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1

Demand Response Enabled Appliance Development at GE  

NLE Websites -- All DOE Office Websites (Extended Search)

Demand Response Enabled Appliance Development at GE Speaker(s): David Najewicz Date: June 12, 2009 - 12:00pm Location: 90-3122 Dave Najewicz of GE Consumer and Appliances will...

2

GE Appliances and Lighting Home Energy Solutions  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

GE Appliances and Lighting GE Appliances and Lighting Home Energy Solutions Introduction to Devices with Brillion(tm) Technology Portfolio of Products 3 GE Appliances and Lighting All Rights Reserved Brillion(tm) Suite of Home Energy Solutions Nucleus(tm) Smart Meter Other Devices Internet IHD Other Devices PCT Non-Meter Solution GE DRMS GEA Server 4 GE Appliances and Lighting All Rights Reserved Nucleus(tm) energy manager with Brillion(tm) technology Consumers can reduce electric usage by an average of 5% per year. 5 GE Appliances and Lighting All Rights Reserved GE Profile Appliances enabled with Brillion(tm) technology Delayed defrost during peak Delayed starts and temperature adjustments during peak Delayed start until off- peak Reduced energy usage 60%, DR- enabled Reduced wattage during peak When coupled with the Nucleus and a TOU

3

Modeling of GE Appliances: Final Presentation  

SciTech Connect

This report is the final in a series of three reports funded by U.S. Department of Energy Office of Electricity Delivery and Energy Reliability (DOE-OE) in collaboration with GE Appliances through a Cooperative Research and Development Agreement (CRADA) to describe the potential of GE Appliances DR-enabled appliances to provide benefits to the utility grid.

Fuller, Jason C.; Vyakaranam, Bharat; Leistritz, Sean M.; Parker, Graham B.

2013-01-31T23:59:59.000Z

4

TEE-0077 - In the Matter of GE Appliances & Lighting | Department...  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

7 - In the Matter of GE Appliances & Lighting TEE-0077 - In the Matter of GE Appliances & Lighting The Decision and Order considers and Application for Exception filed by GE...

5

GE Appliances: Order (2012-SE-1403)  

Energy.gov (U.S. Department of Energy (DOE))

DOE ordered GE Appliances, a Division of General Electric Company to pay a $63,000 civil penalty after finding GE had privately labeled and distributed in commerce in the U.S. the 4-cubic-foot capacity refrigerator basic model SMR04GAZCS, which includes models SMR04GAZACS and SMR04GAZBCS.

6

GE Appliances: Order (2010-CE-2113) | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Order (2010-CE-2113) GE Appliances: Order (2010-CE-2113) September 27, 2010 DOE issued an Order after entering into a Compromise Agreement with General Electric Appliances after...

7

GE Appliances: Proposed Penalty (2010-CE-2113) | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

GE Appliances: Proposed Penalty (2010-CE-2113) GE Appliances: Proposed Penalty (2010-CE-2113) GE Appliances: Proposed Penalty (2010-CE-2113) September 8, 2010 DOE alleged in a Notice of Proposed Civil Penalty that General Electric Appliances failed to certify a variety of dehumidifiers as compliant with the applicable energy conservation standards. DOE regulations require a manufacturer (which includes importers) to submit reports certifying that its products have been tested and meet the applicable energy conservation standards. This civil penalty notice advises the company of the potential penalties and DOE's administrative process, including the company's right to a hearing. GE Appliances: Proposed Penalty (2010-CE-2113) More Documents & Publications De'Longhi USA: Proposed Penalty (2010-CE-2114)

8

TEE-0074 - In the Matter of GE Appliances & Lighting | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

74 - In the Matter of GE Appliances & Lighting 74 - In the Matter of GE Appliances & Lighting TEE-0074 - In the Matter of GE Appliances & Lighting This Decision and Order considers an Application for Exception filed by GE Appliances & Lighting (GE) seeking exception relief from the provision of 10 C.F.R. Part 430, Energy Conservation Program for Consumer Products: Energy Conservation Standards for Refrigerators, Refrigerator-Freezers and Freezers (Refrigerator Efficiency Standards). In its exception request, GE asserts that the firm would suffer a gross inequity if required to adhere to the Refrigerator Efficiency Standards codified at 10 C.F.R. § 430.32. If GE's Application for Exception were granted, GE would receive exception relief from the energy efficiency standard applicable to a new

9

VEA-0016 - In the Matter of GE Appliances | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

6 - In the Matter of GE Appliances 6 - In the Matter of GE Appliances VEA-0016 - In the Matter of GE Appliances Sub-Zero Freezer Co. (Sub-Zero), GE Appliances (GE), and Whirlpool Corporation (Whirlpool) filed appeals of our November 3, 2000 decision, granting Viking Range Corporation (Viking) a six-month exception from the 2001 energy appliance efficiency standards for built-in refrigerators. Viking Range Corp., 28 DOE ¶ 81,002 (2000). As discussed below, we have granted the appeals in part. As a result, the six-month exception will be limited to 475 refrigerators per month and will be subject to a monthly reporting requirement. vea0015-16-17.pdf More Documents & Publications VEH-0015 - In the Matter of Sub-Zero Freezer Co. VEA-0015 - In the Matter of Sub-Zero Freezer Co. VEA-0017 - In the Matter of Whirlpool Corporation

10

Modeling of GE Appliances: Cost Benefit Study of Smart Appliances in Wholesale Energy, Frequency Regulation, and Spinning Reserve Markets  

Science Conference Proceedings (OSTI)

This report is the second in a series of three reports describing the potential of GEs DR-enabled appliances to provide benefits to the utility grid. The first report described the modeling methodology used to represent the GE appliances in the GridLAB-D simulation environment and the estimated potential for peak demand reduction at various deployment levels. The third report will explore the technical capability of aggregated group actions to positively impact grid stability, including frequency and voltage regulation and spinning reserves, and the impacts on distribution feeder voltage regulation, including mitigation of fluctuations caused by high penetration of photovoltaic distributed generation. In this report, a series of analytical methods were presented to estimate the potential cost benefit of smart appliances while utilizing demand response. Previous work estimated the potential technical benefit (i.e., peak reduction) of smart appliances, while this report focuses on the monetary value of that participation. The effects on wholesale energy cost and possible additional revenue available by participating in frequency regulation and spinning reserve markets were explored.

Fuller, Jason C.; Parker, Graham B.

2012-12-31T23:59:59.000Z

11

Modeling of GE Appliances in GridLAB-D: Peak Demand Reduction  

Science Conference Proceedings (OSTI)

The widespread adoption of demand response enabled appliances and thermostats can result in significant reduction to peak electrical demand and provide potential grid stabilization benefits. GE has developed a line of appliances that will have the capability of offering several levels of demand reduction actions based on information from the utility grid, often in the form of price. However due to a number of factors, including the number of demand response enabled appliances available at any given time, the reduction of diversity factor due to the synchronizing control signal, and the percentage of consumers who may override the utility signal, it can be difficult to predict the aggregate response of a large number of residences. The effects of these behaviors can be modeled and simulated in open-source software, GridLAB-D, including evaluation of appliance controls, improvement to current algorithms, and development of aggregate control methodologies. This report is the first in a series of three reports describing the potential of GE's demand response enabled appliances to provide benefits to the utility grid. The first report will describe the modeling methodology used to represent the GE appliances in the GridLAB-D simulation environment and the estimated potential for peak demand reduction at various deployment levels. The second and third reports will explore the potential of aggregated group actions to positively impact grid stability, including frequency and voltage regulation and spinning reserves, and the impacts on distribution feeder voltage regulation, including mitigation of fluctuations caused by high penetration of photovoltaic distributed generation and the effects on volt-var control schemes.

Fuller, Jason C.; Vyakaranam, Bharat GNVSR; Prakash Kumar, Nirupama; Leistritz, Sean M.; Parker, Graham B.

2012-04-29T23:59:59.000Z

12

GE Appliance Park Louisville, KY Plant Wide Assessment Final Report October 25th, 2007  

SciTech Connect

Used a team of experts to analyze and model major systems at a large industrial appliance manufacturer. During the data gathering stage, the team specifically looked for baselining the efficiency of the systems as well as developing short term and longer term efficiency projects. Electrical distribution, Compressed air generation and thermal heat recovery for the production facility and front office heating and cooling optimization were all baselined during the study.

Chandon Rao; Richard Urschel

2007-10-25T23:59:59.000Z

13

GE_Order_and_Compromise_Agreement.pdf  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

GE Appliances, a Division of GE Appliances, a Division of General Electric Company, Respondent ) ) ) ) ) ) ORDER By the General Counsel, U.S. Department of Energy: Case Number: 2012-SE-1403 1. In this Order, I adopt the attached Compromise Agreement entered into between the U.S. Department of Energy ("DOE") and GE Appliances, a Division of General Electric Company ("Respondent"). The Compromise Agreement resolves the case initiated after DOE was informed, based on test results made available as a result of verification testing by the Association of Home Appliance Manufacturers ("AHAM"), that aGE refrigerator basic model may not meet the energy conservation standard set forth in 10 C.F.R. § 430.32(a). 2. DOE and Respondent have negotiated the terms of the Compromise Agreement that

14

Ge-S (Germanium - Sulfur)  

Science Conference Proceedings (OSTI)

Ge-S crystallographic data...Ge-S crystallographic data Phase Composition, wt% S Pearson symbol Space group (Ge) 0 cF 8 Fd m βGeS 30.6 h ** ? αGeS 30.6 oP 8 Pnma GeS 2 46.9 oF 72 Fdd 2...

15

Ge-In (Germanium - Indium)  

Science Conference Proceedings (OSTI)

Ge-In crystallographic data...Ge-In crystallographic data Phase Composition, wt% In Pearson symbol Space group (Ge) 0 cF 8 Fd m (In) 100 tI 2 I 4/ mmm...

16

Recovery Act Helps GE in-source Manufacturing | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Recovery Act Helps GE in-source Manufacturing Recovery Act Helps GE in-source Manufacturing Recovery Act Helps GE in-source Manufacturing September 30, 2010 - 2:21pm Addthis The Geospring Hybrid Water Heater will be produced at GE's Appliance Park in Louisville. | Photo courtesy of GE The Geospring Hybrid Water Heater will be produced at GE's Appliance Park in Louisville. | Photo courtesy of GE Lindsay Gsell GE has a long history in Louisville, Ky. The company's appliance and lighting facility in Louisville has been manufacturing appliances for more than 50 years. Like many facilities, it has seen its share of ups-and-downs. Now, after a tough couple of years, the "Appliance Park" facility is making a "manufacturing" comeback -- with the help of the Recovery Act. The plant retooling project, partially funded through a 48C Advanced Energy

17

Ge-Y (Germanium - Yttrium)  

Science Conference Proceedings (OSTI)

Ge-Y crystallographic data...αY 2 Ge 3 55 hP 3 P 6/ mmm βY 3 Ge 5 57.6 oF 72 Fdd 2 αY 3 Ge 5 57.6 tI 12 I 4 1 / amd YGe 2 62.03 oC 12 Cmcm Y 2 Ge 7 74.09 ? C 222 1 (a) (Ge) 0 to ~0.4 cF 8 Fd m (a) Tentative...

18

Thermoelectric properties of nanoporous Ge  

E-Print Network (OSTI)

We computed thermoelectric properties of nanoporous Ge (np-Ge) with aligned pores along the [001] direction through a combined classical molecular dynamics and first-principles electronic structure approach. A significant ...

Lee, Joo-Hyoung

19

GE | OpenEI Community  

Open Energy Info (EERE)

GE Home Jessi3bl's picture Submitted by Jessi3bl(15) Member 16 December, 2012 - 19:18 GE, Clean Energy Fuels Partner to Expand Natural Gas Highway clean energy Clean Energy Fuels...

20

Development of Superalloy GTD262 at GE  

Science Conference Proceedings (OSTI)

... in GE power generation gas turbines. By integrating computational thermodynamic predictions of phase equilibria with GE's property models and databases,...

Note: This page contains sample records for the topic "ge appliances ge" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


21

OpenEI Community - GE  

Open Energy Info (EERE)

en.openei.orgcommunitytaxonomyterm2030 en GE, Clean Energy Fuels Partner to Expand Natural Gas Highway http:en.openei.orgcommunityblogge-clean-energy-fuels-partner-expa...

22

GE Solar Power | Open Energy Information  

Open Energy Info (EERE)

Login | Sign Up Search Page Edit with form History Facebook icon Twitter icon GE Solar Power Jump to: navigation, search Name GE Solar Power Place Delaware Sector Solar...

23

GE Nucleus for Residential Energy Use Education, Home Energy  

NLE Websites -- All DOE Office Websites (Extended Search)

GE Nucleus for Residential Energy Use Education, Home Energy GE Nucleus for Residential Energy Use Education, Home Energy Management/Control, Residential Energy Integration Speaker(s): William Watts Date: August 4, 2011 - 12:00pm Location: 90-3122 Seminar Host/Point of Contact: Janie Page Home Energy Gateways offer a single point of access to the AMI Smart Meter into the home. The Nucleus is GE's home energy management gateway. The GE Nucleus securely communicates to a Smart Meter and delivers real-time whole home energy consumption data for display to the Consumer. The Consumer is able to visualize their energy usage habits on a Client that is connected via TLS encryption to the WiFi or Ethernet interface of the Nucleus. The Nucleus records history of the consumer's usage and cost data for tracking of energy consumption habits. GE has a suite of Smart Appliances that

24

GE PowerPoint Template  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Steels for Steels for Accident Tolera nt Fuel Cla ddings Ferritic Ma rtensitic Alloys a s Accident Tolera nt Fuel (ATF) Cla dding Ma teria l for Light Wa ter Rea ctors Ra ul B. Reba k, GE Globa l Resea rch DOE Integra tion Meeting, Sa lt La ke City 27-August-2013 DE NE 568 2 / GE Reba k - DOE Integra tion Meeting, Sa lt La ke City, 27-August-2013/ GE Project Tea m 3 / GE Reba k - DOE Integra tion Meeting, Sa lt La ke City, 27-August-2013/ Approa ch of GE Resea rch Proposa l * Demonstra te tha t sta inless iron ba sed bulk a lloys or Adva nced Steels ca n be used a s fuel cla dding ma teria ls in commercia l nuclea r rea ctors * The proposed ma teria l should be a s good a s Zr a lloys (or better tha n Zr a lloys) under norma l opera tion conditions 1. Resista nt to genera l corrosion a nd environmenta l cra

25

ORNL Partners with GE on New Hybrid | ornl.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

ORNL Partners with GE on New Hybrid ORNL Partners with GE on New Hybrid September 02, 2011 Water Heater About 400 jobs will soon be created at a Louisville General Electric plant at which a new electric water heater will be built. The technology was developed through a collaboration between ORNL and GE. The appliance will meet the new Energy Star water heater program criteria, which require future heaters to be twice as efficient as an electric storage water heater, positioning GE to be the first company to meet the energy-saving standard. According to DOE, using devices that meet these criteria should save American households approximately $780 million. ORNL's Patrick Hughes said the water heater will benefit consumers with its energy efficiency as well as its cost savings. "It will give you as much hot water and have the same recovery times so you

26

Clean Cities: National Clean Fleets Partner: GE  

NLE Websites -- All DOE Office Websites (Extended Search)

GE to GE to someone by E-mail Share Clean Cities: National Clean Fleets Partner: GE on Facebook Tweet about Clean Cities: National Clean Fleets Partner: GE on Twitter Bookmark Clean Cities: National Clean Fleets Partner: GE on Google Bookmark Clean Cities: National Clean Fleets Partner: GE on Delicious Rank Clean Cities: National Clean Fleets Partner: GE on Digg Find More places to share Clean Cities: National Clean Fleets Partner: GE on AddThis.com... Goals & Accomplishments Partnerships National Clean Fleets Partnership National Parks Initiative Electric Vehicle Infrastructure Training Program Advanced Vehicle Technology Competitions Natural Gas Transit & School Bus Users Group Natural Gas Vehicle Technology Forum Hall of Fame Contacts National Clean Fleets Partner: GE

27

GE Energy Formerly GE Power Systems | Open Energy Information  

Open Energy Info (EERE)

GE Power Systems GE Power Systems Jump to: navigation, search Name GE Energy (Formerly GE Power Systems) Place Atlanta, Georgia Zip 30339 Sector Renewable Energy, Solar, Wind energy Product Atlanta-based supplier of power generation and energy delivery technologies in all areas of the energy industry including renewable resources such as water, wind, solar and alternative fuels. Coordinates 33.748315°, -84.391109° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":33.748315,"lon":-84.391109,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

28

Stable, free-standing Ge nanocrystals  

E-Print Network (OSTI)

Stable, free-standing Ge nanocrystals I.D. Sharp, a,b) Q.Berkeley, CA 94720 ABSTRACT Free-standing Ge nanocrystalsin diluted HF to obtain free-standing nanocrystals on a Si

2005-01-01T23:59:59.000Z

29

Valley splitting theory of SiGe/Si/SiGe quantum wells Mark Friesen,1,  

E-Print Network (OSTI)

Valley splitting theory of SiGe/Si/SiGe quantum wells Mark Friesen,1, * Sucismita Chutia,1 Charles an effective mass theory for SiGe/Si/SiGe quantum wells, with an emphasis on calculating the valley splitting. The theory introduces a valley coupling parameter vv which encapsulates the physics of the quantum well

Sheridan, Jennifer

30

Spectrum of electron-hole states of the Si/Ge structure with Ge quantum dots  

Science Conference Proceedings (OSTI)

The lateral photoconductivity spectra of Si/Ge multilayer structures with Ge quantum dots of various sizes are investigated. We observed optical transition lines between the hole levels of quantum dots and electronic states of Si. This enabled us to construct a detailed energy level diagram of the electron-hole spectrum of the Si/Ge structures. It is shown that the hole levels of Ge quantum dots are successfully described by the 'quantum box' model using the actual sizes of Ge islands. It I found that the position of the longwavelength photosensitivity boundary of Si/Ge structures with Ge quantum dots can be controlled by changing the growth parameters.

Talochkin, A. B., E-mail: tal@thermo.isp.nsc.ru; Chistokhin, I. B., E-mail: igor@thermo.isp.nsc.ru [Russian Academy of Sciences, Institute of Semiconductor Physics, Siberian Branch (Russian Federation)

2011-09-15T23:59:59.000Z

31

Photoconductivity of Si/Ge multilayer structures with Ge quantum dots pseudomorphic to the Si matrix  

SciTech Connect

Longitudinal photoconductivity spectra of Si/Ge multilayer structures with Ge quantum dots grown pseudomorphically to the Si matrix are studied. Lines of optical transitions between hole levels of quantum dots and Si electronic states are observed. This allowed us to construct a detailed energy-level diagram of electron-hole levels of the structure. It is shown that hole levels of pseudomorphic Ge quantum dots are well described by the simplest 'quantum box' model using actual sizes of Ge islands. The possibility of controlling the position of the long-wavelength photosensitivity edge by varying the growth parameters of Si/Ge structures with Ge quantum dots is determined.

Talochkin, A. B., E-mail: tal@thermo.isp.nsc.ru; Chistokhin, I. B. [Russian Academy of Sciences, Rzhanov Institute of Semiconductor Physics, Siberian Branch (Russian Federation)

2011-07-15T23:59:59.000Z

32

GE Upgrades Top Selling Advanced Gas Turbine  

Science Conference Proceedings (OSTI)

Oct 30, 2009 ... According to GE, a typical power plant operating two new 7FA gas turbines with a single steam turbine in combined cycle configuration would...

33

Project Brief: General Electric, GE Global Research  

Science Conference Proceedings (OSTI)

... for rapidly routing electrical energy to customers from diverse sources such as wind and solar powered devices. RECIPIENT: General Electric, GE ...

2010-10-05T23:59:59.000Z

34

Ge/SiGe quantum well devices for light modulation, detection, and emission.  

E-Print Network (OSTI)

??This PhD thesis is devoted to study electro-optic properties of Gemanium/Silicon-Germanium (Ge/SiGe) multiple quantum wells (MQWs) for light modulation, detection, and emission on Si platform. (more)

Chaisakul, Papichaya

2012-01-01T23:59:59.000Z

35

Monolithic Ge-on-Si lasers for integrated photonics  

E-Print Network (OSTI)

We report room temperature Ge-on-Si lasers with direct gap emission at 1590-1610 nm. Modeling of Ge/Si double heterojunction structures, which is supported by experimental results of Ge/Si LEDs, indicates the feasibility ...

Liu, Jifeng

36

Ge-on-Si laser for silicon photonics  

E-Print Network (OSTI)

Ge-on-Si devices are explored for photonic integration. Importance of Ge in photonics has grown and through techniques developed in our group we demonstrated low density of dislocations (<1x109cm-2) and point defects Ge ...

Camacho-Aguilera, Rodolfo Ernesto

2013-01-01T23:59:59.000Z

37

General Electric in India GE | Open Energy Information  

Open Energy Info (EERE)

General Electric in India GE Jump to: navigation, search Name General Electric in India (GE) Place New Delhi, Delhi (NCT), India Zip 110015 Sector Services, Wind energy Product...

38

12 GeV Upgrade | Jefferson Lab  

NLE Websites -- All DOE Office Websites

Science Science A Schematic of the 12 GeV Upgrade The 12 GeV Upgrade will greatly expand the research capabilities of Jefferson Lab, adding a fourth experimental hall, upgrading existing halls and doubling the power of the lab's accelerator. A D D I T I O N A L L I N K S: 12 GeV Home Public Interest Scientific Opportunities Hall D Status Updates Contacts Three-Year Accelerator Schedule 2014 - 2016 top-right bottom-left-corner bottom-right-corner 12 GeV Upgrade Physicists at Jefferson Lab are trying to find answers to some of nature's most perplexing questions about the universe by exploring the nucleus of the atom. Their goal is to answer such questions as: "What is the universe made of?" and "What holds everyday matter together?" In their search for answers, physicists smash electrons into atoms using

39

The greening of GE [alternative energy  

Science Conference Proceedings (OSTI)

General Electric (GE) Co., is now focused on alternative energy resources as it has begun manufacturing wind turbines and photovoltaics, invested in hydrogen fuel cells, and become a leader in the development of gasification equipment that could double ...

P. Fairley

2005-07-01T23:59:59.000Z

40

STM Survey of As/Ge(mnn) and P/Ge(mnn) Surfaces  

DOE Green Energy (OSTI)

This paper contains a few representative results of a scanning tunneling microscope (STM) survey of Ge surfaces after exposure to arsenic and phosphorous.

McMahon, W. E.; Olson, J. M.

2000-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ge appliances ge" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


41

Waveguide Electroabsorption Modulator on Si Employing Ge/SiGe Quantum Wells  

E-Print Network (OSTI)

Waveguide Electroabsorption Modulator on Si Employing Ge/SiGe Quantum Wells Onur Fidaner, Ali K. 2007 Optical Society of America OCIS codes: (230.4110) Modulators ; (230.5590) Quantum-well devices Low wells opened up the possibility of realizing small and power-efficient electroabsorption modulators

Miller, David A. B.

42

GE Hitachi Nuclear Energy | Open Energy Information  

Open Energy Info (EERE)

GE Hitachi Nuclear Energy GE Hitachi Nuclear Energy Jump to: navigation, search Name GE Hitachi Nuclear Energy Place Wilmington, North Carolina Zip 28402 Sector Efficiency, Services Product GE Hitachi Nuclear Energy develops advanced light water reactors and offers products and services used by operators of boiling water reactor (BWR) nuclear power plants to improve efficiency and boost output. Coordinates 42.866922°, -72.868494° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":42.866922,"lon":-72.868494,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

43

STATEMENT OF CONSIDERATIONS REQUEST BY GE CORPORATE RESEARCH & DEVELOPMENT (GE-CRD)  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

CORPORATE RESEARCH & DEVELOPMENT (GE-CRD) CORPORATE RESEARCH & DEVELOPMENT (GE-CRD) FOR AN ADVANCE WAIVER OF DOMESTIC AND FOREIGN PATENT RIGHTS UNDER DOE COOPERATIVE AGREEMENT NO. DE-FC07- 96ID13406; W(A)-96-004; CH-0894 The Petitioner, GE Corporate Research & Development (GE-CRD) has requested a waiver of domestic and foreign patent rights for all subject inventions arising from its participation under the above referenced cooperative agreement entitled "Electric Vehicle Program - Ultracapacitor/Battery Electronic Interface Project." The objective of the cooperative agreement is to develop prototype electronic interface hardware to verify the design of the power electronics and basic control strategy for an advanced electric vehicle drive line that uses ultracapacitors to load level the main storage battery. The

44

GE Lighting Solutions: Order (2013-SE-4901) | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Order (2013-SE-4901) GE Lighting Solutions: Order (2013-SE-4901) April 4, 2013 DOE ordered General Electric Lighting Solutions, LLC to pay a 5,360 civil penalty after finding GE...

45

GE Wind Energy Germany | Open Energy Information  

Open Energy Info (EERE)

Jump to: navigation, search Jump to: navigation, search Name GE Wind Energy Germany Place Salzbergen, Germany Zip 48499 Sector Wind energy Product Germany-based, division of GE Wind Energy wind turbine manufacturer and supplier. Coordinates 52.323136°, 7.347278° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":52.323136,"lon":7.347278,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

46

The 115 GeV Higgs Odyssey  

E-Print Network (OSTI)

On his way home from Troy, Odysseus had arrived within reach of Ithaca when a great storm blew up. He was swept away, and only several years later was he able to return to reclaim his rights from the rapacious suitors, with the aid of his son Telemachus. Some wonder whether this epic is repeating itself, if the Higgs weighs 115 GeV. If so, are CMS and ATLAS cast in the role of Telemachus? In this paper, I first discuss how close to Ithaca LEP may have been, the fact that a 115 GeV Higgs boson would disfavour technicolour, its potential implications for supersymmetry, and finally the prospects for completing the Higgs Odyssey.

John Ellis

2000-11-27T23:59:59.000Z

47

The 115 GeV Higgs Odyssey  

E-Print Network (OSTI)

On his way home from Troy, Odysseus had arrived within reach of Ithaca when a great storm blew up. He was swept away, and only several years later was he able to return to reclaim his rights from the rapacious suitors, with the aid of his son Telemachus. Some wonder whether this epic is repeating itself, if the Higgs weighs 115 GeV. If so, are CMS and ATLAS cast in the role of Telemachus? In this paper, I first discuss how close to Ithaca LEP may have been, the fact that a 115 GeV Higgs boson would disfavour technicolour, its potential implications for supersymmetry, and finally the prospects for completing the Higgs Odyssey.

Ellis, Jonathan Richard

2000-01-01T23:59:59.000Z

48

Booster 6-GeV study  

Science Conference Proceedings (OSTI)

Since a wider aperture has been obtained along the Booster beam line, this opens the opportunity for Booster running a higher intensity beam than ever before. Sooner or later, the available RF accelerating voltage will become a new limit for the beam intensity. Either by increasing the RFSUM or by reducing the accelerating rate can achieve the similar goal. The motivation for the 6-GeV study is to gain the relative accelerating voltage via a slower acceleration.

Yang, Xi; Ankenbrandt, Charles M.; Pellico, William A.; Lackey, James; Padilla, Rene; /Fermilab; Norem, J.; /Argonne

2004-12-01T23:59:59.000Z

49

Booster 6-GeV study  

Science Conference Proceedings (OSTI)

A wider aperture, which has been obtained along the Booster beam line recently, brings the opportunity to run beams with the intensity higher than ever before. Sooner or later, the available RF accelerating voltage will become a new limit for the beam intensity. Extra accelerating voltages can be achieved either by increasing the RFSUM or by reducing the accelerating rate via a slower acceleration, and this motivates the 6-GeV study.

Yang, Xi; Ankenbrandt, Charles M.; Pellico, William A.; Lackey, James; Padilla, Rene; /Fermilab; Norem, James; /Argonne

2005-05-01T23:59:59.000Z

50

An optimistic CoGeNT analysis  

E-Print Network (OSTI)

Inspired by a recently proposed model of millicharged atomic dark matter (MADM), we analyze several classes of light dark matter models with respect to CoGeNT modulated and unmodulated data, and constraints from CDMS, XENON10 and XENON100. After removing the surface contaminated events from the original CoGeNT data set, we find an acceptable fit to all these data (but with the modulating part of the signal making a statistically small contribution), using somewhat relaxed assumptions about the response of the null experiments at low recoil energies, and postulating an unknown modulating background in the CoGeNT data at recoil energies above 1.5 keVee. We compare the fits of MADM---an example of inelastic magnetic dark matter---to those of standard elastically and inelastically scattering light WIMPs (eDM and iDM). The iDM model gives the best fit, with MADM close behind. The dark matter interpretation of the DAMA annual modulation cannot be made compatible with these results however. We find that the inclusion of a tidal debris component in the dark matter phase space distribution improves the fits or helps to relieve tension with XENON constraints.

James M. Cline; Zuowei Liu; Wei Xue

2012-07-12T23:59:59.000Z

51

Prompt Gamma Rays in {sup 77}Ge after Neutron Capture on {sup 76}Ge  

SciTech Connect

The observation of neutrinoless double beta decay would be proof of the Majorana nature of the neutrino. Half-lives for these decays are very long (for {sup 76}Ge:>10{sup 25} y), so background reduction and rejection is the major task for double beta experiments. The GERDA (GERmanium Detector Array) experiment at the Gran Sasso Laboratory of the INFN (LNGS) searches for neutrinoless double beta decay of {sup 76}Ge. The isotope {sup 76}Ge is an ideal candidate because it can be used as source and detector at the same time. A large remaining contribution to the background arises from the prompt gamma cascade after neutron capture by {sup 76}Ge followed by {beta}{sup -}-decay of {sup 77}Ge. Since the prompt gamma decay scheme is poorly known, measurements with isotopically enriched Germanium samples were carried out at the PGAA facility at the research reactor FRM II (Munich). With the known prompt gamma spectrum it will be possible to improve the overall veto efficiency of the GERDA experiment.

Meierhofer, Georg; Grabmayr, Peter; Jochum, Josef [Physikalisches Institut, Eberhard Karls Universitaet Tuebingen, Auf der Morgenstelle 14, 72076 Tuebingen (Germany); Canella, Lea [Institut fuer Radiochemie, Technische Universitaet Muenchen, Walther-Meissner-Str. 3, 85748 Garching (Germany); Jolie, Jan; Kudejova, Petra; Warr, Nigel [Institut fuer Kernphysik, Universitaet zu Koeln, Zuelpicher Str. 77, 50937 Cologne (Germany)

2009-01-28T23:59:59.000Z

52

Reactive dc magnetron sputtering of (GeO{sub x}-SiO{sub 2}) superlattices for Ge nanocrystal formation  

Science Conference Proceedings (OSTI)

The motivation of this work is the tailored growth of Ge nanocrystals for photovoltaic applications. The use of superlattices provides a reliable method to control the Ge nanocrystal size after phase separation. In this paper, we report on the deposition of (GeO{sub x}-SiO{sub 2}) superlattices via reactive dc magnetron sputtering and the self-ordered Ge nanocrystal formation during subsequent annealing. Attention is directed mainly to define proper deposition conditions for tuning the GeO{sub x} composition between elemental Ge (x=0) and GeO{sub 2} (x=2) by the variation in the deposition temperature and the oxygen partial pressure. A convenient process window has been found which allows sequential GeO{sub x}-SiO{sub 2} deposition without changing the oxygen partial pressure during deposition. The phase separation and Ge nanocrystal formation after subsequent annealing were investigated with in situ x-ray scattering, Raman spectroscopy, and electron microscopy. By these methods the existence of 2-5 nm Ge nanocrystals at annealing temperatures of 600-750 deg. C has been confirmed which is within the superlattice stability range. The technique used allows the fabrication of superlattice stacks with very smooth interfaces (roughnessnanocrystal layers could be separated by very thin SiO{sub 2} films (d<3 nm) which offers interesting possibilities for charge transport via direct tunneling.

Zschintzsch, M.; Jeutter, N. M.; Borany, J. von; Krause, M.; Muecklich, A. [Institute of Ion Beam Physics and Materials Research, Forschungszentrum Dresden Rossendorf e.V., P.O. Box 51 01 19, 01314 Dresden (Germany)

2010-02-15T23:59:59.000Z

53

GE-Hitachi Nuclear Energy Americas LLC  

E-Print Network (OSTI)

This letter provides information concerning the evaluation now completed by GE Hitachi Nuclear Energy (GEH) regarding a potential non-conservatism in the calculation of Main Steam Line (MSL) choked flow rates. As stated herein, GEH has concluded that this is not a Reportable Condition for all U.S. BWR/2-6 plants in accordance with the requirements of 10 CFR 21.21(d). This letter closes the supplemental 60-Day Interim Report Notification (MFN 12-111 R1), provided on December 12, 2102, per 21.21(a)(2). If you have any questions, please call me at (910) 819-4491. Sincerely,

Dale E. Porter; Dale E. Porter; S. S. Philpott; S. J. Pannier

2013-01-01T23:59:59.000Z

54

Muon interactions at 490 GeV  

DOE Green Energy (OSTI)

E665 is a new, high-energy muon scattering experiment at Fermilab. Data were taken with a 490 GeV muon beam incident on deuterium, hydrogen, and xenon targets during the 1987--88 fixed target run. These data are being analyzed with various physics objectives in mind, and a number of preliminary results have been obtained. This paper presents four of results, specifically the small {chi}{sub Bj} ratio of xenon and deuterium cross sections, inclusive hadron distributions, two jet signals, and exclusive {rho}{sup 0} production.

Schmitt, M. (Fermi National Accelerator Lab., Batavia, IL (USA) Harvard Univ., Cambridge, MA (USA))

1990-06-01T23:59:59.000Z

55

GE Uses DOE Advanced Light Sources to Develop Revolutionary Battery  

Office of Science (SC) Website

GE Uses DOE Advanced Light Sources to Develop GE Uses DOE Advanced Light Sources to Develop Revolutionary Battery Technology Discovery & Innovation Stories of Discovery & Innovation Brief Science Highlights SBIR/STTR Highlights Contact Information Office of Science U.S. Department of Energy 1000 Independence Ave., SW Washington, DC 20585 P: (202) 586-5430 06.13.11 GE Uses DOE Advanced Light Sources to Develop Revolutionary Battery Technology Company is constructing a new battery factory in Upstate New York that is expected to create 300+ jobs. Print Text Size: A A A Subscribe FeedbackShare Page Click to enlarge photo. Enlarge Photo GE's new Image courtesy of GE GE's new "Durathon(tm)" sodium metal halide battery. The story of American manufacturing over the past two decades has too often been a tale of outsourcing, off-shoring, and downsizing-not least in

56

Formation of NiGe through germanium oxide on Ge(001) substrate  

Science Conference Proceedings (OSTI)

Germanium based devices are of interest due to their performance potential. The use of germanium as source and drain requires low resistance access achieved by the formation of germanide (metal-germanium compound). The nickel mono-germanide (NiGe) is ...

F. Nemouchi, V. Carron, J. L. LBR, L. Vandroux, Y. Morand, T. Morel, J. P. Barnes

2013-07-01T23:59:59.000Z

57

Electroactive complex in thermally treated Ge-Si crystals  

Science Conference Proceedings (OSTI)

It is shown by Hall measurements that quenching complexly doped Ge{sub 1-x}Si{sub x} (0 { crystals with copper.

Azhdarov, G. Kh., E-mail: zangi@physics.ab.az [Academy of Sciences of Azerbaijan, Institute of Physics (Azerbaijan); Zeynalov, Z. M. [Ganja State University (Azerbaijan); Zakhrabekova, Z. M. [Academy of Sciences of Azerbaijan, Institute of Physics (Azerbaijan); Kyazimova, A. I. [Ganja State University (Azerbaijan)

2010-05-15T23:59:59.000Z

58

Titan Propels GE Wind Turbine Research into New Territory | ornl...  

NLE Websites -- All DOE Office Websites (Extended Search)

(ALCC) award, GE is using the hybrid CPUGPU Cray XK7 Titan supercomputer managed by the Oak Ridge Leadership Computing Facility (OLCF) at Oak Ridge National Laboratory to...

59

GE Wind Energy | Open Energy Information  

Open Energy Info (EERE)

Wind Energy Wind Energy Jump to: navigation, search Name GE Wind Energy Place Atlanta, Georgia Zip GA 30339 Sector Wind energy Product GE's wind energy division, formed as a result of the purchase of almost all of Enron Wind Corporation's assets. Provides power plant design, engineering and site selection, as well as operation and maintenance. Coordinates 33.748315°, -84.391109° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":33.748315,"lon":-84.391109,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

60

MU(& Ge-+v,  

Office of Legacy Management (LM)

fil fil MU(& Ge-+v, . !d R&arch & Development b This document consists of 6 Contract Ho. pages and - . --------------_____---. figures No.--~--of.--~~-_-copies, Series,&,, This subcontract entered into this 20 day 0fSepte~ber , 1943, by and between the University of Cliicago, a corporation not for pecuniary profit organized under the ICVS of the Stnto of Illinois, of Chicago, Illinois (hereinafter called "the Contractor") and Yiolverine Tube Divisionof Caluzet 2 Eecla Consolidated Co;-,er co, . a cor?orntion organized under the laws cf the State of l~lch~;an - of Detroit, I:ichigan --- (hersinnftcr called "the Subcontractoi"). WIEHEAS, tho Contractor has heretofore onterod into a contract v;ith the United States of America (rcprcse;!tcd by its dtlly designated

Note: This page contains sample records for the topic "ge appliances ge" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
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61

3 GeV Injector Design Handbook  

Science Conference Proceedings (OSTI)

This Design Handbook is intended to be the main reference book for the specifications of the 3 GeV SPEAR booster synchrotron project. It is intended to be a consistent description of the project including design criteria, key technical specifications as well as current design approaches. Since a project is not complete till it's complete changes and modifications of early conceptual designs must be expected during the duration of the construction. Therefore, this Design Handbook is issued as a loose leaf binder so that individual sections can be replaced as needed. Each page will be dated to ease identification with respect to latest revisions. At the end of the project this Design Handbook will have become the 'as built' reference book of the injector for operations and maintenance personnel.

Wiedemann, H.; /SLAC, SSRL

2009-12-16T23:59:59.000Z

62

H2S molecular beam passivation of Ge(001)  

Science Conference Proceedings (OSTI)

A fundamental issue regarding the introduction of high-mobility Ge channels in CMOS circuits is the electrical passivation of the interface with the high-k gate dielectric. In this paper, we investigate the passivation of p-Ge(001) using molecular H"2S. ... Keywords: H2S, High- semiconductors, Molecular beam epitaxy, Passivation

C. Merckling; Y. C. Chang; C. Y. Lu; J. Penaud; M. El-Kazzi; F. Bellenger; G. Brammertz; M. Hong; J. Kwo; M. Meuris; J. Dekoster; M. M. Heyns; M. Caymax

2011-04-01T23:59:59.000Z

63

Ge epitaxial refill deposition techniques for fabricating pedestal transistor structures  

Science Conference Proceedings (OSTI)

An etch-epitaxial refill technique is described for the fabrication of integrated high-speed Ge transistor structures having a pedestal configuration. The device areas surrounding 0.1 ohm-cm mesa structures were refilled with Ge having a resistivity ...

V. J. Silvestri; T. B. Light; H. N. Yu; A. Reisman

1972-01-01T23:59:59.000Z

64

Secretary Chu Speaks at GE Solar Facility | Department of Energy  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Chu Speaks at GE Solar Facility Chu Speaks at GE Solar Facility Secretary Chu Speaks at GE Solar Facility November 18, 2011 - 1:19pm Addthis Secretary Steven Chu's remarks, as prepared for delivery, at the General Electric Solar Facility in Arvada, Colorado. Thank you, Fred [Seymour], for the introduction. GE is a leader in energy innovation. Thomas Edison, the father of GE, once said, "I'd put my money on the sun and solar energy. What a source of power!" I imagine he would be amazed by the solar technology that is tested here. It's great to be in Colorado, a state that is at the forefront of the clean energy economy and has more solar jobs per capita than any other state[i]. I'm here at a critical time for America's energy future. It's a time of challenge, but it's also a time of opportunity.

65

GE Lighting Solutions: Noncompliance Determination (2013-SE-4901) |  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Noncompliance Determination (2013-SE-4901) Noncompliance Determination (2013-SE-4901) GE Lighting Solutions: Noncompliance Determination (2013-SE-4901) January 11, 2013 DOE issued a Notice of Noncompliance Determination to General Electric Lighting Solutions finding that various models of traffic signal modules do not comport with the energy conservation standards. DOE determined the products were noncompliant based on the company's own testing. GE Lighting Solutions must immediately notify each person (or company) to whom GE Lighting Solutions distributed the noncompliant products that the products do not meet Federal standards. In addition, GE Lighting Solutions must provide to DOE documents and records showing the number of units GE Lighting Solutions distributed and to whom. The manufacturer

66

Polarized Proton Collisions at 205 GeV at RHIC  

Science Conference Proceedings (OSTI)

The Brookhaven Relativistic Heavy Ion Collider (RHIC) has been providing collisions of polarized protons at a beam energy of 100 GeV since 2001. Equipped with two full Siberian snakes in each ring, polarization is preserved during acceleration from injection to 100 GeV. However, the intrinsic spin resonances beyond 100 GeV are about a factor of 2 stronger than those below 100 GeV making it important to examine the impact of these strong intrinsic spin resonances on polarization survival and the tolerance for vertical orbit distortions. Polarized protons were first accelerated to the record energy of 205 GeV in RHIC with a significant polarization measured at top energy in 2005. This Letter presents the results and discusses the sensitivity of the polarization survival to orbit distortions.

Bai, M.; Roser, T.; Ahrens, L.; Alessi, J.; Beebe-Wang, J.; Blaskiewicz, M.; Bravar, A.; Brennan, J.M.; Bruno, D.; Courant, E.; Drees, A.; Fischer, W.; Gardner, C.; Gill, R.; Glenn, J.; Huang, H.; Kewisch, J.; Luccio, A.; Luo, Y.; Pilat, F. [Brookhaven National Laboratory, Upton, New York 11973 (United States)] (and others)

2006-05-05T23:59:59.000Z

67

Superheating and supercooling of Ge nanocrystals embedded in SiO2  

E-Print Network (OSTI)

and liquid Ge/matrix interface free energies govern thematrix, however, alters the interface free energy ofenergy, whereas the relative values of the solid Ge/matrix

2006-01-01T23:59:59.000Z

68

Growth and Characterization of Ge 1-x Sn x Layers for High Mobility ...  

Science Conference Proceedings (OSTI)

Tensile-strained Ge and GeSn layers are attractive for high mobility channel materials of future CMOS devices, because both electron and hole mobilities of...

69

Black Ge Based on Crystalline/Amorphous Core/Shell Nanoneedle ...  

transmission electron microscope (TEM) image of a Ge NN ... are distinctly observed. (e) The EDS line pro?le reveals that the NN structure is pure Ge.

70

Low temperature epitaxial growth of Ge on cube- textured Ni  

SciTech Connect

Quasi- single crystal Ge films were grown on [001]<010> textured Ni substrate at a temperature of 350 oC using an insulating buffer layer of CaF2. A direct deposition of Ge on Ni at 350 oC was shown to alloy with Ni. From x- ray pole figure analysis, it was shown that Ge grew epitaxially with the same orientation as CaF2 and the dispersions in the out- of- plane and in- plane directions were found to be 1.7 0.1o and 6 1o, respectively. In the out- of- plane direction, Ge[111]||CaF2[111]||Ni[001]. In addition, the Ge consisted of four equivalent in- plane oriented domains such that two mutually orthogonal directions: Ge 211 and Ge 011 are parallel to mutually orthogonal directions: Ni 110 and Ni 110 , respectively of the Ni(001) surface. This was shown to be originated from the four equivalent in- plane oriented domains of CaF2 created to minimize the mismatch strain between CaF2 and Ni in those directions.

GIARE, C [Rensselaer Polytechnic Institute (RPI); Palazzo, J [Rensselaer Polytechnic Institute (RPI); Goyal, Amit [ORNL; WANG, G [Rensselaer Polytechnic Institute (RPI); LU, T [Rensselaer Polytechnic Institute (RPI)

2012-01-01T23:59:59.000Z

71

GeV Emission from Collisional Magnetized Gamma Ray Bursts  

E-Print Network (OSTI)

Magnetic fields may play a dominant role in gamma-ray bursts, and recent observations by the Fermi satellite indicate that GeV radiation, when detected, arrives delayed by seconds from the onset of the MeV component. Motivated by this, we discuss a magnetically dominated jet model where both magnetic dissipation and nuclear collisions are important. We show that, for parameters typical of the observed bursts, such a model involving a realistic jet structure can reproduce the general features of the MeV and a separate GeV radiation component, including the time delay between the two. The model also predicts a multi-GeV neutrino component.

P. Mszros; M. J. Rees

2011-04-26T23:59:59.000Z

72

GE Lighting Solutions: Proposed Penalty (2013-SE-4901) | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

GE Lighting Solutions: Proposed Penalty (2013-SE-4901) GE Lighting Solutions: Proposed Penalty (2013-SE-4901) GE Lighting Solutions: Proposed Penalty (2013-SE-4901) March 5, 2013 DOE alleged in a Notice of Proposed Civil Penalty that General Electric Lighting Solutions manufactured and distributed noncompliant traffic signal modules in the U.S. Federal law subjects manufacturers and private labelers to civil penalties if those parties distribute in the U.S. products that do not meet applicable energy conservation standards. This civil penalty notice advises the company of the potential penalties and DOE's administrative process, including the company's right to a hearing. GE Lighting Solutions: Proposed Penalty (2013-SE-4901) More Documents & Publications Act One: NPCP (2013-CE-49001) Excellence Opto: Proposed Penalty (2013-CE-49002)

73

Crystal Lake - GE Energy Wind Farm | Open Energy Information  

Open Energy Info (EERE)

GE Energy Wind Farm GE Energy Wind Farm Jump to: navigation, search Name Crystal Lake - GE Energy Wind Farm Facility Crystal Lake - GE Energy Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner NextEra Energy Resources Developer NextEra Energy Resources Location IA Coordinates 43.194201°, -93.860521° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":43.194201,"lon":-93.860521,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

74

Northern Colorado Wind Energy Center (GE) | Open Energy Information  

Open Energy Info (EERE)

Center (GE) Center (GE) Jump to: navigation, search Name Northern Colorado Wind Energy Center (GE) Facility Northern Colorado Wind Energy Center (GE) Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner NextEra Energy Developer NextEra Energy Energy Purchaser Xcel Energy Location Logan County CO Coordinates 40.974539°, -103.025336° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":40.974539,"lon":-103.025336,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

75

Notrees 1B (GE Energy) Wind Farm | Open Energy Information  

Open Energy Info (EERE)

B (GE Energy) Wind Farm B (GE Energy) Wind Farm Jump to: navigation, search Name Notrees 1B (GE Energy) Wind Farm Facility Notrees 1B (GE Energy) Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Duke Energy Carolinas LLC Developer Duke Energy Carolinas LLC Location TX Coordinates 31.9685988°, -99.9018131° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":31.9685988,"lon":-99.9018131,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

76

GE Nucleus for Residential Energy Use Education, Home Energy...  

NLE Websites -- All DOE Office Websites (Extended Search)

GE Nucleus for Residential Energy Use Education, Home Energy ManagementControl, Residential Energy Integration Speaker(s): William Watts Date: August 4, 2011 - 12:00pm Location:...

77

Ge-on-Si laser operating at room temperature  

E-Print Network (OSTI)

Monolithic lasers on Si are ideal for high-volume and large-scale electronicphotonic integration. Ge is an interesting candidate owing to its pseudodirect gap properties and compatibility with Si complementary metal oxide ...

Liu, Jifeng

78

Probing the Structure of {sup 74}Ge Nucleus with Coupled-channels Analysis of {sup 74}Ge+{sup 74}Ge Fusion Reaction  

Science Conference Proceedings (OSTI)

We study the fusion reaction of the {sup 74}Ge+{sup 74}Ge system in term of the full order coupled-channels formalism. We especially calculated the fusion cross section as well as the fusion barrier distribution of this reaction using transition matrix suggested by recent Coulomb excitation experiment. We compare the results with the one obtained by coupling matrix based on pure vibrational and rotational models. The present coupled-channels calculations for the barrier distributions obtained using experiment coupling matrix is in good agreement with the one obtained with vibrational model, in contrast to the rotational model. This is indicates that {sup 74}Ge nucleus favor a spherical shape than a deformed shape in its ground state. Our results will resolve the debates concerning the structure of this nucleus.

Zamrun F, Muhammad [Deparment of Physics University of Malaya, Kuala Lumpur, 50603 (Malaysia); Jurusan Fisika FMIPA, Universitas Haluoleo, Kendari, Sulawesi Tenggara, 93232 (Indonesia); Kasim, Hasan Abu [Deparment of Physics University of Malaya, Kuala Lumpur, 50603 (Malaysia)

2010-12-23T23:59:59.000Z

79

Multimuon production in 280 GeV ?+ iron interactions  

Science Conference Proceedings (OSTI)

Results are presented on dimuon and trimuon final states in 280 GeV ?+ iron interactions. Both dimuon and trimuon data show clear evidence for open charm production and suggest strongly that the dominant production process is photon?gluon fusion. Similar amounts of elastic and inelastic (shower energy ?5 GeV) J/? production are measured in the trimuon sample. Elastic J/? production is consistent with photon?gluon fusion plus naive assumptions. Inelastic J/? production is inconsistent with this simple model

The European Muon Collaboration

1980-01-01T23:59:59.000Z

80

Thermally oxidized formation of new Ge dots over as-grown Ge dots in the Si capping layer  

Science Conference Proceedings (OSTI)

A Si-capped Ge quantum dot sample was self-assembly grown via Stranski-Krastanov mode in a molecular beam epitaxy system with the Si capping layer deposited at 300 deg. C. After annealing the sample in an oxygen atmosphere at 1000 deg. C, a structure, namely two layers of quantum dots, was formed with the newly formed Ge-rich quantum dots embedded in the oxidized matrix with the position accurately located upon the as-grown quantum dots. It has been found that the formation of such nanostructures strongly depends upon the growth temperature and oxygen atmosphere. A growth mechanism was proposed to explain the formation of the nanostructure based on the Ge diffusion from the as-grown quantum dots, Ge segregation from the growing oxide, and subsequent migration/agglomeration.

Nie Tianxiao [State Key Laboratory of Surface Physics, Fudan University, Shanghai 200433 (China); Materials Engineering, University of Queensland, Brisbane, Queensland QLD 4072 (Australia); Lin Jinhui; Shao Yuanmin; Wu Yueqin; Yang Xinju; Fan Yongliang; Jiang Zuimin [State Key Laboratory of Surface Physics, Fudan University, Shanghai 200433 (China); Chen Zhigang [Materials Engineering, University of Queensland, Brisbane, Queensland QLD 4072 (Australia); Zou Jin [Materials Engineering, University of Queensland, Brisbane, Queensland QLD 4072 (Australia); Centre for Microscopy and Microanalysis, University of Queensland, Brisbane, Queensland QLD 4072 (Australia)

2011-12-01T23:59:59.000Z

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81

TEM Study on the Evolution of Ge Nanocrystals in Si Oxide Matrix as a Function of Ge Concentration and the Si Reduction Process  

E-Print Network (OSTI)

Growth and evolution of germanium (Ge) nanocrystals embedded into a silicon oxide (SiO?) system have been studied based on the Ge content of co-sputtered Ge-SiO? films using transmission electron microscopy (TEM) and X-ray ...

Chew, Han Guan

82

Cedar Creek Wind Farm I (GE) | Open Energy Information  

Open Energy Info (EERE)

GE) GE) Jump to: navigation, search Name Cedar Creek Wind Farm I (GE) Facility Cedar Creek Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Babcock & Brown/BP America Developer Babcock & Brown/BP America Energy Purchaser Xcel Energy Location Weld County east of Grover CO Coordinates 40.873578°, -104.07825° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":40.873578,"lon":-104.07825,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

83

Greenhouse Gas Services AES GE EFS | Open Energy Information  

Open Energy Info (EERE)

Greenhouse Gas Services AES GE EFS Greenhouse Gas Services AES GE EFS Jump to: navigation, search Name Greenhouse Gas Services (AES/GE EFS) Place Arlington, Virginia Zip 22203-4168 Product Develop and invest in a range of projects that reduce greenhouse gas emissions that produce verified GHG credits. Coordinates 43.337585°, -89.379449° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":43.337585,"lon":-89.379449,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

84

Top of the World (GE) | Open Energy Information  

Open Energy Info (EERE)

Top of the World (GE) Top of the World (GE) Facility Top of the World (GE) Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Duke Energy Carolinas LLC Developer Duke Energy Carolinas LLC Energy Purchaser PacifiCorp Location 4 miles northeast of Glenrock WY Coordinates 42.914132°, -105.691223° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":42.914132,"lon":-105.691223,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

85

NETL: News Release - GE Sets Benchmarks for Fuel Cell Performance  

NLE Websites -- All DOE Office Websites (Extended Search)

August 8, 2005 August 8, 2005 GE Sets Benchmarks for Fuel Cell Performance Achievements Move Efficient, Clean SOFC Technology Closer to Mainstream Energy Markets TORRANCE, CA - In the race to speed solid oxide fuel cell (SOFC) technology out of niche markets and into widespread commercial use, GE Hybrid Power Generation Systems has kicked fuel cell performance into high gear. Recent advancements have dramatically improved baseline cell performance and accelerate GE's prospects for achieving the system efficiency and cost objectives of DOE's Solid State Energy Alliance (SECA) program. Packing more power into smaller volumes is one of the breakthroughs needed to reduce the cost and expand the use of efficient, environmentally friendly fuel cells. But increasing power density isn't the only goal; as power density increases, fuel cells must continue to efficiently and reliably convert fuel to electric power.

86

Spin Structure with JLab 6 and 12 GeV  

Science Conference Proceedings (OSTI)

Highlights of JLab 6 GeV results on spin structure study and plan for 12 GeV program. Spin structure study is full of surprises and puzzles. A decade of experiments from JLab yield these exciting results: (1) valence spin structure; (2) precision measurements of g{sub 2}/d{sub 2} - high-twist; (3) spin sum rules and polarizabilities; and (4) first neutron transversity. There is a bright future as the 12 GeV Upgrade will greatly enhance our capability: (1) Precision determination of the valence quark spin structure flavor separation; (2) Precision measurements of g{sub 2}/d{sub 2}; and (3) Precision extraction of transversity/tensor charge.

Jian-Ping Chen

2012-02-01T23:59:59.000Z

87

Jefferson Lab 12 GeV CEBAF Upgrade  

Science Conference Proceedings (OSTI)

The existing continuous electron beam accelerator facility (CEBAF) at Thomas Jefferson National Accelerator Facility (TJNAF) is a 5-pass, recirculating cw electron Linac operating at ~6 GeV and is devoted to basic research in nuclear physics. The 12 GeV CEBAF Upgrade is a $310 M project, sponsored by the Department of Energy (DOE) Office of Nuclear Physics, that will expand its research capabilities substantially by doubling the maximum energy and adding major new experimental apparatus. The project received construction approval in September 2008 and has started the major procurement process. The cryogenic aspects of the 12 GeV CEBAF Upgrade includes: doubling the accelerating voltages of the Linacs by adding ten new high-performance, superconducting radiofrequency (SRF) cryomodules (CMs) to the existing 42 1/4 cryomodules; doubling of the 2 K cryogenics plant; and the addition of eight superconducting magnets.

Claus Rode

2010-04-01T23:59:59.000Z

88

Reducing 68Ge Background in Dark Matter Experiments  

SciTech Connect

Experimental searches for dark matter include experiments with sub-0.5 keV-energy threshold high purity germanium detectors. Experimental efforts, in partnership with the CoGeNT Collaboration operating at the Soudan Underground Laboratory, are focusing on energy threshold reduction via noise abatement, reduction of backgrounds from cosmic ray generated isotopes, and ubiquitous environmental radioactive sources. The most significant cosmic ray produced radionuclide is 68Ge. This paper evaluates reducing this background by freshly mining and processing germanium ore. The most probable outcome is a reduction of the background by a factor of two, and at most a factor of four. A very cost effective alternative is to obtain processed Ge as soon as possible and store it underground for 18 months.

Kouzes, Richard T.; Orrell, John L.

2011-03-01T23:59:59.000Z

89

Cedar Creek Wind Farm II (GE) | Open Energy Information  

Open Energy Info (EERE)

Cedar Creek Wind Farm II (GE) Cedar Creek Wind Farm II (GE) Jump to: navigation, search Name Cedar Creek Wind Farm II (GE) Facility Cedar Creek II (GE) Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner BP Wind Energy Developer BP Wind Energy Energy Purchaser Xcel Energy Location Weld County CO Coordinates 40.868652°, -104.092398° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":40.868652,"lon":-104.092398,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

90

7-GeV Advanced Photon Source Conceptual Design Report  

SciTech Connect

During the past decade, synchrotron radiation emitted by circulating electron beams has come into wide use as a powerful, versatile source of x-rays for probing the structure of matter and for studying various physical processes. Several synchrotron radiation facilities with different designs and characteristics are now in regular operation throughout the world, with recent additions in this country being the 0.8-GeV and 2.5-GeV rings of NSLS at Brookhaven National Laboratory. However, none of the operating facilities has been designed to use a low-emittance, high-energy stored beam, together with modern undulator devices, to produce a large number of hard x-ray beams of extremely high brilliance. This document is a proposal to the Department of Energy to construct and operate high-energy synchrotron radiation facility at Argonne National Laboratory. We have now chosen to set the design energy of this facility at 7.0 GeV, with the capability to operate at up to 7.5 GeV.

Not Available

1987-04-01T23:59:59.000Z

91

Demand Response Performance of GE Hybrid Heat Pump Water Heater  

SciTech Connect

This report describes a project to evaluate and document the DR performance of HPWH as compared to ERWH for two primary types of DR events: peak curtailments and balancing reserves. The experiments were conducted with GE second-generation Brillion-enabled GeoSpring hybrid water heaters in the PNNL Lab Homes, with one GE GeoSpring water heater operating in Standard electric resistance mode to represent the baseline and one GE GeoSpring water heater operating in Heat Pump mode to provide the comparison to heat pump-only demand response. It is expected that Hybrid DR performance, which would engage both the heat pump and electric elements, could be interpolated from these two experimental extremes. Signals were sent simultaneously to the two water heaters in the side-by-side PNNL Lab Homes under highly controlled, simulated occupancy conditions. This report presents the results of the evaluation, which documents the demand-response capability of the GE GeoSpring HPWH for peak load reduction and regulation services. The sections describe the experimental protocol and test apparatus used to collect data, present the baselining procedure, discuss the results of the simulated DR events for the HPWH and ERWH, and synthesize key conclusions based on the collected data.

Widder, Sarah H.; Parker, Graham B.; Petersen, Joseph M.; Baechler, Michael C.

2013-07-01T23:59:59.000Z

92

Commercialization potential of compositionally graded Ge - Si??x?Gex? - Si substrates for solar applications  

E-Print Network (OSTI)

This project considers the potential of Ge - Si??x?Gex? - Si substrates for solar applications. The use of compositionally graded substrates to achieve heterointegration across different materials platforms such as Si, Ge ...

Goh, Johnathan Jian Ming

2006-01-01T23:59:59.000Z

93

Large inherent optical gain from the direct gap transition of Ge thin films  

E-Print Network (OSTI)

The recent demonstration of Ge-on-Si diode lasers renews the interest in the unique carrier dynamics of Ge involving both direct (?) and indirect (L) valleys. Here, we report a large inherent direct gap optical gain ...

Wang, Xiaoxin

94

EA-0389: Proposed 7-GeV Advanced Photon Source, Argonne, Illinois  

Energy.gov (U.S. Department of Energy (DOE))

This EA evaluates the environmental impacts of a proposal for construction and operation of a 6- to 7-GeV synchrotron radiation source known as the 7-GeV Advanced Photon Source atDOE's Argonne...

95

Epitaxial Ge/Il-V Heterostructures : MOCVD growth, characterization, and applications  

E-Print Network (OSTI)

Epitaxial Ge thin films are being investigated for many important roles in next generation microelectronics. Metal-oxide-semiconductor field effect transistors (MOSFETs) utilizing Ge channels have demonstrated dramatic ...

Bai, Yu, Ph.D. Massachusetts Institute of Technology

2011-01-01T23:59:59.000Z

96

FF4, SiGe/Si Selective Etch Structures for Nanowire Release and ...  

Science Conference Proceedings (OSTI)

1 To attain Ge-rich SiGe nanowire segment at temperatures above 400C, which is more compatible with SiNW growth conditions, disilane (1% in...

97

THE MAGNET LATTICE OF THE LBL 1-2 GeV SYNCHROTRON RADIATION SOURCE  

E-Print Network (OSTI)

the Chasman- Green TBA Lattices," LBL-21279, to be published19, 1987 THE MAGNET LATTICE OF THE LBL 1-2 GeV SYNCHROTRONLBL- 22193 THE MAGNET LATTICE OF THE LBL 1-2 GeV SYNCHROTRON

Jackson, A.

2010-01-01T23:59:59.000Z

98

GE to DOE General Counsel; Re:Request for Comment on Large Capacity Clothes Washers  

Energy.gov (U.S. Department of Energy (DOE))

GE urges the department engage in rulmaking to amend the clothes washer test procedure to reflect efficiency standards of large-capacity residential clothes washer machines. GE also urges the DOE...

99

The BErkeley Lab Laser Accelerator (BELLA): A 10 GeV Laser Plasma Accelerator  

E-Print Network (OSTI)

The BErkeley Lab Laser Accelerator (BELLA):A 10 GeV Laser Plasma Accelerator W.P. Leemans ' , R.of the design of a 10 GeV laser plasma accelerator (LPA)

Leemans, W.P.

2011-01-01T23:59:59.000Z

100

Si/SiGe Quantum Devices and Quantum Wells: Electron Spin Coherence  

E-Print Network (OSTI)

Si/SiGe Quantum Devices and Quantum Wells: Electron Spin Coherence J. L. Truitt1 , K. A. Slinker1 quantum wells are clad by SiGe barriers, and therefore intrinsically strained, leading to growth the current status of ESR experiments in Si/SiGe quantum wells. Many factors can effect transport in silicon

Sheridan, Jennifer

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101

High mobility CMOS transistors on Si/SiGe heterostructure channels  

Science Conference Proceedings (OSTI)

We have demonstrated high mobility CMOS transistors on Si/SiGe heterostructure channels selectively grown on a Si (100) substrate. Electron and hole mobility is enhanced simultaneously on a single Si/SiGe heterostructure channel by confining electrons ... Keywords: Hetero-epitaxy, Hetero-structure, High mobility channel, SiGe CMOS

Jungwoo Oh; Kanghoon Jeon; Se-Hoon Lee; Jeff Huang; P. Y. Hung; Injo Ok; Barry Sassman; Dae-Hong Ko; Paul Kirsch; Raj Jammy

2012-09-01T23:59:59.000Z

102

GE Lighting Solutions: Proposed Penalty (2013-SE-4901) | Department of  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Proposed Penalty (2013-SE-4901) Proposed Penalty (2013-SE-4901) GE Lighting Solutions: Proposed Penalty (2013-SE-4901) March 5, 2013 DOE alleged in a Notice of Proposed Civil Penalty that General Electric Lighting Solutions manufactured and distributed noncompliant traffic signal modules in the U.S. Federal law subjects manufacturers and private labelers to civil penalties if those parties distribute in the U.S. products that do not meet applicable energy conservation standards. This civil penalty notice advises the company of the potential penalties and DOE's administrative process, including the company's right to a hearing. GE Lighting Solutions: Proposed Penalty (2013-SE-4901) More Documents & Publications Watermark: Proposed Penalty (2011-SW-2908) Act One: NPCP (2013-CE-49001)

103

Capricorn Ridge (GE Energy) Wind Farm | Open Energy Information  

Open Energy Info (EERE)

Energy) Wind Farm Energy) Wind Farm Jump to: navigation, search Name Capricorn Ridge (GE Energy) Wind Farm Facility Capricorn Ridge (GE Energy) Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner NextEra Energy Resources Developer NextEra Energy Resources Location TX Coordinates 31.838061°, -100.923965° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":31.838061,"lon":-100.923965,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

104

Multi-GeV Electron Generation Using Texas Petawatt Laser  

Science Conference Proceedings (OSTI)

We present simulation results and experimental setup for multi-GeV electron generation by a laser plasma wake field accelerator (LWFA) driven by the Texas Petawatt (TPW) laser. Simulations show that, in plasma of density n{sub e} = 2-4x10{sup 17} cm{sup -3}, the TPW laser pulse (1.1 PW, 170 fs) can self-guide over 5 Rayleigh ranges, while electrons self-injected into the LWFA can accelerate up to 7 GeV. Optical diagnostic methods employed to observe the laser beam self-guiding, electron trapping and plasma bubble formation and evolution are discussed. Electron beam diagnostics, including optical transition radiation (OTR) and electron gamma ray shower (EGS) generation, are discussed as well.

Wang, X.; Du, D.; Yi, S. A.; Kalmykov, S.; D'avignon, E.; Fazel, N.; Zagdzaj, R.; Reed, S.; Dong, P.; Henderson, W.; Dyer, G.; Bernstein, A.; Gaul, E.; Martinez, M.; Shvets, G.; Ditmire, T.; Downer, M. [Department of Physics, University of Texas at Austin, Austin, TX 78712 (United States)

2010-11-04T23:59:59.000Z

105

The 12 GeV Energy Upgrade at Jefferson Laboratory  

SciTech Connect

Two new cryomodules and an extensive upgrade of the bending magnets at Jefferson Lab has been recently completed in preparation for the full energy upgrade in about one year. Jefferson Laboratory has undertaken a major upgrade of its flagship facility, the CW re-circulating CEBAF linac, with the goal of doubling the linac energy to 12 GeV. I will discuss here the main scope and timeline of the upgrade and report on recent accomplishments and the present status. I will then discuss in more detail the core of the upgrade, the new additional C100 cryomodules, their production, tests and recent successful performance. I will then conclude by looking at the future plans of Jefferson Laboratory, from the commissioning and operations of the 12 GeV CEBAF to the design of the MEIC electron ion collider.

Pilat, Fulvia C. [JLAB

2012-09-01T23:59:59.000Z

106

InGaAs and Ge MOSFETs with high ? dielectrics  

Science Conference Proceedings (OSTI)

InGaAs and Ge MOSFETs with high @k's are now the leading candidates for technology beyond the 15nm node CMOS. The UHV-Al"2O"3/Ga"2O"3(Gd"2O"3) [GGO]/InGaAs has low electrical leakage current densities, C-V characteristics with low interfacial densities ... Keywords: Atomic layer deposition, Germanium, High ? dielectrics, III-V Compound semiconductor, MOSFETs, Molecular beam epitaxy

W. C. Lee; P. Chang; T. D. Lin; L. K. Chu; H. C. Chiu; J. Kwo; M. Hong

2011-04-01T23:59:59.000Z

107

Milford Wind Corridor Phase I (GE Energy) | Open Energy Information  

Open Energy Info (EERE)

form form View source History View New Pages Recent Changes All Special Pages Semantic Search/Querying Get Involved Help Apps Datasets Community Login | Sign Up Search Page Edit with form History Facebook icon Twitter icon » Milford Wind Corridor Phase I (GE Energy) Jump to: navigation, search Name Milford Wind Corridor Phase I (GE Energy) Facility Milford Wind Corridor Phase I (GE Energy) Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner First Wind Developer First Wind Energy Purchaser Southern California Public Power Authority Location Milford UT Coordinates 38.52227°, -112.935262° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":38.52227,"lon":-112.935262,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

108

NMSSM Higgs Benchmarks Near 125 GeV  

E-Print Network (OSTI)

The recent LHC indications of a SM-like Higgs boson near 125 GeV are consistent not only with the Standard Model (SM) but also with Supersymmetry (SUSY). However naturalness arguments disfavour the Minimal Supersymmetric Standard Model (MSSM). We consider the Next-to-Minimal Supersymmetric Standard Model (NMSSM) with a SM-like Higgs boson near 125 GeV involving relatively light stops and gluinos below 1 TeV in order to satisfy naturalness requirements. We are careful to ensure that the chosen values of couplings do not become non perturbative below the grand unification (GUT) scale, although we also examine how these limits may be extended by the addition of extra matter to the NMSSM at the two-loop level. We then propose four sets of benchmark points corresponding to the SM-like Higgs boson being the lightest or the second lightest Higgs state in the NMSSM or the NMSSM-with-extra-matter. With the aid of these benchmark points we discuss how the NMSSM Higgs boson near 125 GeV may be distinguished from the SM Higgs boson in future LHC searches.

S. F. King; M. Muhlleitner; R. Nevzorov

2012-01-12T23:59:59.000Z

109

Gamma-Ray Bursts Above 1 GeV  

E-Print Network (OSTI)

One of the principal results obtained by the Compton Gamma Ray Observatory relating to the study of gamma-ray bursts was the detection by the EGRET instrument of energetic ($>$100 MeV) photons from a handful of bright bursts. The most extreme of these was the single 18 GeV photon from the GRB940217 source. Given EGRET's sensitivity and limited field of view, the detection rate implies that such high energy emission may be ubiquitous in bursts. Hence expectations that bursts emit out to at least TeV energies are quite realistic, and the associated target-of-opportunity activity of the TeV gamma-ray community is well-founded. This review summarizes the observations and a handful of theoretical models for generating GeV--TeV emission in bursts sources, outlining possible ways that future positive detections could discriminate between different scenarios. The power of observations in the GeV--TeV range to distinguish between spectral structure intrinsic to bursts and that due to the intervening medium between source and observer is also discussed.

Matthew G. Baring

1997-11-21T23:59:59.000Z

110

Kinetics of Ge-Se-In Film Growth  

SciTech Connect

The processes of vacuum evaporation and condensation in the Ge-Se-In system were investigated. Thin amorphous films were deposited by modified thermal evaporation from previously synthesized non-crystalline (GeSe{sub y}){sub 1-x}In{sub x} ingots, where x = 0, 5, 10, 15, 20 and y = 4, 5 and 6. The specific evaporation rate was determined by measuring of the mass of evaporator before evaporation and the mass of empty evaporator after evaporation in temperature range of evaporation (500-800) K. The substrate temperature was varied in the range (300-430) K to study the condensation process and specific condensation rate was determined by measuring of the substrate mass before and after condensation. The condensation energy of the (GeSe{sub y}){sub 1-x}In{sub x} layers steady increases at indium addition.The thin films studied by transmission electron microscopy (TEM) and electron microdiffraction (EMD) reveal homogeneous and amorphous structure. The layer composition determined by Auger electron spectroscopy is close to that of the corresponded bulk samples.

Stoilova, A.; Petkov, P.; Nedeva, Y. [Department of Physics, University of Chemical Technology and Metallurgy, 1756 Sofia (Bulgaria); Monchev, B. [Institute of Electrochemistry and Energy Systems, BAS, 1113 Sofia (Bulgaria)

2010-01-21T23:59:59.000Z

111

Chemical nature of the passivation layer depending on the oxidizing agent in Gd2O3/GeO2/Ge stacks grown by molecular beam deposition  

Science Conference Proceedings (OSTI)

In Ge-based metal oxide semiconductor technology, the insertion of a passivation layer seems to be crucial in unpinning the Fermi level at the interface and in reducing the amount of interface defects. GeO"2 was obtained by atomic oxygen (AO), molecular ... Keywords: Gadolinium oxide, Germanium, Molecular beam deposition, Passivation layer, Time-of-flight secondary ion mass spectrometry

A. Lamperti; S. Baldovino; A. Molle; M. Fanciulli

2011-04-01T23:59:59.000Z

112

Chemical Bonding, Interfaces and Defects in Hafnium Oxide/Germanium Oxynitride Gate Stacks on Ge (100)  

SciTech Connect

Correlations among interface properties and chemical bonding characteristics in HfO{sub 2}/GeO{sub x}N{sub y}/Ge MIS stacks were investigated using in-situ remote nitridation of the Ge (100) surface prior to HfO{sub 2} atomic layer deposition (ALD). Ultra thin ({approx}1.1 nm), thermally stable and aqueous etch-resistant GeO{sub x}N{sub y} interfaces layers that exhibited Ge core level photoelectron spectra (PES) similar to stoichiometric Ge{sub 3}N{sub 4} were synthesized. To evaluate GeO{sub x}N{sub y}/Ge interface defects, the density of interface states (D{sub it}) was extracted by the conductance method across the band gap. Forming gas annealed (FGA) samples exhibited substantially lower D{sub it} ({approx} 1 x 10{sup 12} cm{sup -2} eV{sup -1}) than did high vacuum annealed (HVA) and inert gas anneal (IGA) samples ({approx} 1x 10{sup 13} cm{sup -2} eV{sup -1}). Germanium core level photoelectron spectra from similar FGA-treated samples detected out-diffusion of germanium oxide to the HfO{sub 2} film surface and apparent modification of chemical bonding at the GeO{sub x}N{sub y}/Ge interface, which is related to the reduced D{sub it}.

Oshima, Yasuhiro; /Stanford U., Materials Sci. Dept.; Sun, Yun; /SLAC, SSRL; Kuzum, Duygu; /Stanford U.; Sugawara, Takuya; Saraswat, Krishna C.; Pianetta, Piero; /SLAC, SSRL; McIntyre, Paul C.; /Stanford U., Materials Sci. Dept.

2008-10-31T23:59:59.000Z

113

How is the blazar GeV emission really produced?  

E-Print Network (OSTI)

We show that the external Compton (EC) model for the production of the GeV emission in blazars makes specific predictions for the spectrum and variability of those blazars characterized by a high Compton dominance (Compton to synchrotron luminosity ratio). These unavoidable features have not been observed, casting doubt on the validity of this popular model. We argue that synchrotron-self Compton (SSC) models including the higher orders of Compton scattering are more promising, and we briefly discuss the implications of our findings for the geometry of the broad line region (BLR).

Markos Georganopoulos; Eric Perlman; Demosthenes Kazanas; Brian Wingert

2005-06-23T23:59:59.000Z

114

Chemical equilibrium study at SPS 158A GeV  

E-Print Network (OSTI)

A detailed study of chemical freeze-out in nucleus-nucleus collisions at beam energy 158A GeV is presented. By analyzing hadronic multiplicities within the statistical hadronization approach, the chemical equilibration of p-p, C-C, Si-Si and Pb-Pb systems is studied as a function of the number of participating nucleons in the system. Additionally, Two Component statistical hadronization model is applied to the data and is found to be able to explain the observed strangeness hadronic phase space under-saturation.

Jaakko Manninen

2004-11-30T23:59:59.000Z

115

The Jefferson Lab 12 GeV Upgrade  

Science Conference Proceedings (OSTI)

A major upgrade of the Continuous Electron Beam Accelerator Facility (CEBAF) at the Thomas Jefferson National Accelerator Facility is in progress. Construction began in 2008 and the project should be completed in 2015. The upgrade includes doubling the energy of the electron beam to 12 GeV, the addition of a new fourth experimental hall, and new experimental equipment in three of the experimental halls. A brief overview of this upgrade project is presented along with some highlights of the anticipated experimental program.

R.D. McKeown

2011-10-01T23:59:59.000Z

116

8 GeV H- ions: Transport and injection  

DOE Green Energy (OSTI)

Fermilab is working on the design of an 8 GeV superconducting RF H{sup -} linac called the Proton Driver. The energy of H{sup -} beam will be an order of magnitude higher than the existing ones. This brings up a number of technical challenges to transport and injection of H{sup -} ions. This paper will focus on the subjects of stripping losses (including stripping by blackbody radiation, field and residual gas) and carbon foil stripping efficiency, along with a brief discussion on other issues such as Stark states lifetime of hydrogen atoms, single and multiple Coulomb scattering, foil heating and stress, radiation activation, collimation and jitter correction, etc.

Chou, W.; Bryant, H.; Drozhdin, A.; Hill, C.; Kostin, M.; Macek, R.; Ostiguy, J.-F.; Rees, G.H.; Tang, Z.; Yoon, P.; /Fermilab /New Mexico U. /Los Alamos /Rutherford

2005-05-01T23:59:59.000Z

117

Vermont Yankee's benefits and concerns operating with Axially zoned GE9 fuel  

Science Conference Proceedings (OSTI)

Vermont Yankee (VY) is a 368-assembly, D-lattice, boiling water reactor (BWR)/4. The current cycle 16 contains 252 GE9 assemblies with axial zoning of gadolinium and enrichment, 112 GE8 assemblies with axially zoned gadolinium, and 4 Siemens 9 x 9-IX lead qualification assemblies. In this paper, the performance of the GE9-dominated core is evaluated against previous cores containing less sophisticated fuel designs.

Woehlke, R.A. (Yankee Atomic Electric Co., Bolton, MA (United States))

1993-01-01T23:59:59.000Z

118

The Jefferson Lab program: From 6 GeV operations to the 12 GeV upgrade  

Science Conference Proceedings (OSTI)

The Thomas Jefferson National Laboratory and the CEBAF accelerator operated for more than a decade, running a comprehensive scientific program that improved our understanding of the strong interaction. The facility is now moving toward an upgrade of the machine, from 6 to 12 GeV; a new experimental hall will be added and the equipment of the three existing halls will be enhanced. In this contribution some selected results from the rich physics program run at JLab, as well as the prospects for the near future, will be presented.

Marco Battaglieri

2012-04-01T23:59:59.000Z

119

G Ge Get Get E Get El Get Ele Get Elec Get Elect Get Electr Get ...  

Science Conference Proceedings (OSTI)

G. Ge. Get. Get E. Get El. Get Ele. Get Elec. Get Elect. Get Electr. Get Electri. Get Electrif. Get Electrifi. Get Electrifie. Get Electrified. Get Electrified Electronic...

120

EE3, Molecular Beam Epitaxy of Very Thin Fluoride Films on Ge(111)  

Science Conference Proceedings (OSTI)

RTDs were fabricated on Ge substrates by using the initial fluoride layer grown under the optimized condition. The various fluoride layers grown by the single...

Note: This page contains sample records for the topic "ge appliances ge" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


121

Application of Alloy 718 in GE Aircraft Engines: Past, Present and ...  

Science Conference Proceedings (OSTI)

Robert E. Schafrik, Douglas D. Ward, Jon R. Groh. GE Aircraft Engines. Materials and Process Engineering Department. Cincinnati. Ohio 452 15. ABSTRACT.

122

Radiation microscope for SEE testing using GeV ions.  

SciTech Connect

Radiation Effects Microscopy is an extremely useful technique in failure analysis of electronic parts used in radiation environment. It also provides much needed support for development of radiation hard components used in spacecraft and nuclear weapons. As the IC manufacturing technology progresses, more and more overlayers are used; therefore, the sensitive region of the part is getting farther and farther from the surface. The thickness of these overlayers is so large today that the traditional microbeams, which are used for REM are unable to reach the sensitive regions. As a result, higher ion beam energies have to be used (> GeV), which are available only at cyclotrons. Since it is extremely complicated to focus these GeV ion beams, a new method has to be developed to perform REM at cyclotrons. We developed a new technique, Ion Photon Emission Microscopy, where instead of focusing the ion beam we use secondary photons emitted from a fluorescence layer on top of the devices being tested to determine the position of the ion hit. By recording this position information in coincidence with an SEE signal we will be able to indentify radiation sensitive regions of modern electronic parts, which will increase the efficiency of radiation hard circuits.

Doyle, Barney Lee; Knapp, James Arthur; Rossi, Paolo; Hattar, Khalid M.; Vizkelethy, Gyorgy; Brice, David Kenneth; Branson, Janelle V.

2009-09-01T23:59:59.000Z

123

12 GeV Upgrade Project - Cryomodule Production  

Science Conference Proceedings (OSTI)

The Thomas Jefferson National Accelerator Facility (Jefferson Lab) is producing ten 100+MV SRF cryomodules (C100) as part of the CEBAF 12 GeV Upgrade Project. Once installed, these cryomodules will become part of an integrated accelerator system upgrade that will result in doubling the energy of the CEBAF machine from 6 to 12 GeV. This paper will present a complete overview of the C100 cryomodule production process. The C100 cryomodule was designed to have the major components procured from private industry and assembled together at Jefferson Lab. In addition to measuring the integrated component performance, the performance of the individual components is verified prior to being released for production and assembly into a cryomodule. Following a comprehensive cold acceptance test of all subsystems, the completed C100 cryomodules are installed and commissioned in the CEBAF machine in preparation of accelerator operations. This overview of the cryomodule production process will include all principal performance measurements, acceptance criterion and up to date status of current activities.

J. Hogan, A. Burrill, G.K. Davis, M.A. Drury, M. Wiseman

2012-07-01T23:59:59.000Z

124

Hotcell Examination of GE11 and GE13 BWR Fuel Exposed to 52 and 65 GWd/MTU at the Limerick 1 and 2 Reactors  

Science Conference Proceedings (OSTI)

BWR fuel components of the GE11 and GE13 (9x9) designs that operated to either 51-53 or 65 GWd/MTU average exposure in the Limerick 1 and Limerick 2 reactors were examined in the GE Vallecitos hotcells. The irradiation of the components and their examination are part of a program to quantify operating margins, to improve fuel-cycle economics by increasing exposure to which BWR fuel can operate, and to evaluate the effects of cladding process and operation in NobleChemTM water chemistry. The post-irradiat...

2007-12-20T23:59:59.000Z

125

Axial Ge/Si nanowire heterostructure tunnel FETs  

SciTech Connect

The vapor-liquid-solid (VLS) growth of semiconductor nanowires allows doping and composition modulation along their axis and the realization of axial 1 D heterostructures. This provides additional flexibility in energy band-edge engineering along the transport direction which is difficult to attain by planar materials growth and processing techniques. We report here on the design, growth, fabrication, and characterization of asymmetric heterostructure tunnel field-effect transistors (HTFETs) based on 100% compositionally modulated Si/Ge axial NWs for high on-current operation and low ambipolar transport behavior. We discuss the optimization of band-offsets and Schottky barrier heights for high performance HTFETs and issues surrounding their experimental realization. Our HTFET devices with 10 nm PECVD SiN{sub x} gate dielectric resulted in a measured current drive exceeding 100 {mu}A/{mu}m (I/{pi}D) and 10{sup 5} I{sub on}/I{sub off} ratios.

Picraux, Sanuel T [Los Alamos National Laboratory; Daych, Shadi A [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

126

Direct Detection of Sub-GeV Dark Matter  

SciTech Connect

Direct detection strategies are proposed for dark matter particles with MeV to GeV mass. In this largely unexplored mass range, dark matter scattering with electrons can cause single-electron ionization signals, which are detectable with current technology. Ultraviolet photons, individual ions, and heat are interesting alternative signals. Focusing on ionization, we calculate the expected dark matter scattering rates and estimate the sensitivity of possible experiments. Backgrounds that may be relevant are discussed. Theoretically interesting models can be probed with existing technologies, and may even be within reach using ongoing direct detection experiments. Significant improvements in sensitivity should be possible with dedicated experiments, opening up a window to new regions in dark matter parameter space.

Essig, Rouven; Mardon, Jeremy; Volansky, Tomer

2012-03-20T23:59:59.000Z

127

200-GeV ISA with room temperature magnets  

SciTech Connect

A conceptual design study of 200-GeV proton intersecting storage accclerators with room temperature magnets is presented. The key to this study was thc desire to keep the electric power consumptiom to an acceptable level (40 MW). The design has been optimized by choosing small-gap (4 cm) aluminum coil dipoles operating at about 15 kG. The luminosity of this machine is limited to about 10/sup 32/ cm-/sup -2/ sec/sup -1/ by transverse space-charg e effects. An order of magnitude higher luminositics can be obtained by adding a booster of modest cost. A novel vacuum system using distributed Ti-sublimation pumps results in considerable savings. A cost comparison with a high-luminosity superconducting machine is given. (auth)

Willis, W.J.; Danby, G.T.; Hahn, H.; Halama, H.J.; Maschke, A.W.; Month, M.; Parzen, G.; Polk, I.

1974-02-11T23:59:59.000Z

128

Microsoft Word - Poster Abstract_2010_GE Global Reserach.doc  

NLE Websites -- All DOE Office Websites (Extended Search)

current collector geometry on ohmic resistance current collector geometry on ohmic resistance H. Cao, S. Gaunt, T. Striker and M.J. Alinger* GE Global Research, One Research Circle, Niskayuna, NY 12309 In order to directly measure the cathode current collector ohmic resistance contribution to the total cell resistance, contact resistance measurements are typically made. In addition to starting cell resistance contributions, these tests provide data regarding resistance changes over time for interpretation of performance degradation. However, the geometries of the current collection used during this testing are often not directly representative of operational fuel cells. Thus, an experimental study was initiated to investigate the effect of various interconnect geometries and their influence on Area

129

Observation of the polarization in reaction ????n at 40 GeV/c  

Science Conference Proceedings (OSTI)

The preliminary results of polarization measurements in reaction ??+p??+n at 40 GeV/c for the 4?momentum transfers up to 1 (GeV/c)2 are presented. Averaged blue of the polarization in the t?range 0

V. D. Apokin; I. A. Avvakumov; N. S. Borisov; B. V. Chuiko; Yu. M. Goncharenko; Yu. M. Kazarinov; B. A. Khachaturov; G. G. G. Macharashvili; V. N. Matafonov; Yu. A. Matulenko; A. P. Meschanin; A. I. Mysnik; A. B. Neganov; S. B. Nurushev; L. B. Parfenov; A. F. Prudkogliad; A. I. Saraykin; E. V. Smirnov; V. L. Solovyanov; L. F. Solovyev; Yu. A. Usov; A. N. Vasilyev

1983-01-01T23:59:59.000Z

130

Gamma-ray energies for calibration of Ge(Li) spectrometers  

SciTech Connect

Gamma-ray energies are compared for bent-crystal measurements, Ge(Li) measurements, and other measurements. 150 gamma-ray energies below 3450 keV from 35 isotopes are being calibrated for calibration of Ge(Li) spectrometers. (WHK)

Helmer, R.G.; Greenwood, R.C.; Gehrke, R.J.

1975-01-01T23:59:59.000Z

131

Ge integration on Si via rare earth oxide buffers: From MBE to CVD (Invited Paper)  

Science Conference Proceedings (OSTI)

Single crystalline rare earth oxide heterostructures are flexible buffer systems to achieve the monolithic integration of Ge thin film structures on Si. The development of engineered oxide systems suitable for mass-production compatible CVD processes ... Keywords: Engineered Si wafers, Ge integration, Heteroepitaxy, Rare earth oxides, X-ray diffraction

T. Schroeder; A. Giussani; H. -J. Muessig; G. Weidner; I. Costina; Ch. Wenger; M. Lukosius; P. Storck; P. Zaumseil

2009-07-01T23:59:59.000Z

132

Activation and thermal stability of ultra-shallow B{sup +}-implants in Ge  

Science Conference Proceedings (OSTI)

The activation and thermal stability of ultra-shallow B{sup +} implants in crystalline (c-Ge) and preamorphized Ge (PA-Ge) following rapid thermal annealing was investigated using micro Hall effect and ion beam analysis techniques. The residual implanted dose of ultra-shallow B{sup +} implants in Ge was characterized using elastic recoil detection and was determined to correlate well with simulations with a dose loss of 23.2%, 21.4%, and 17.6% due to ion backscattering for 2, 4, and 6 keV implants in Ge, respectively. The electrical activation of ultra-shallow B{sup +} implants at 2, 4, and 6 keV to fluences ranging from 5.0 Multiplication-Sign 10{sup 13} to 5.0 Multiplication-Sign 10{sup 15} cm{sup -2} was studied using micro Hall effect measurements after annealing at 400-600 Degree-Sign C for 60 s. For both c-Ge and PA-Ge, a large fraction of the implanted dose is rendered inactive due to the formation of a presumable B-Ge cluster. The B lattice location in samples annealed at 400 Degree-Sign C for 60 s was characterized by channeling analysis with a 650 keV H{sup +} beam by utilizing the {sup 11}B(p, {alpha})2{alpha} nuclear reaction and confirmed the large fraction of off-lattice B for both c-Ge and PA-Ge. Within the investigated annealing range, no significant change in activation was observed. An increase in the fraction of activated dopant was observed with increasing energy which suggests that the surface proximity and the local point defect environment has a strong impact on B activation in Ge. The results suggest the presence of an inactive B-Ge cluster for ultra-shallow implants in both c-Ge and PA-Ge that remains stable upon annealing for temperatures up to 600 Degree-Sign C.

Yates, B. R.; Darby, B. L.; Jones, K. S. [Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611 (United States); Petersen, D. H. [DTU Nanotech, Department of Micro- and Nanotechnology, Technical University of Denmark, DK-2800 Kgs. Lyngby (Denmark); Hansen, O. [DTU Nanotech, Department of Micro- and Nanotechnology, Technical University of Denmark, DK-2800 Kgs. Lyngby (Denmark); CINF, Center for Individual Nanoparticle Functionality, Technical University of Denmark, DK-2800 Kongens Lyngby (Denmark); Lin, R.; Nielsen, P. F. [CAPRES A/S, Scion-DTU, DK-2800 Kgs. Lyngby (Denmark); Romano, L. [IMM-CNR MATIS and Dipartimento di Fisica e Astronomia, Universita di Catania, Via S. Sofia 64, I-95123 Catania (Italy); Doyle, B. L. [Sandia National Laboratories, MS-1056, Albuquerque, New Mexico 87185 (United States); Kontos, A. [Applied Materials, Gloucester, Massachusetts 01930 (United States)

2012-12-15T23:59:59.000Z

133

GE, Clean Energy Fuels Partner to Expand Natural Gas Highway | OpenEI  

Open Energy Info (EERE)

GE, Clean Energy Fuels Partner to Expand Natural Gas Highway GE, Clean Energy Fuels Partner to Expand Natural Gas Highway Home > Groups > Clean and Renewable Energy Jessi3bl's picture Submitted by Jessi3bl(15) Member 16 December, 2012 - 19:18 clean energy Clean Energy Fuels energy Environment Fuel GE Innovation Partnerships Technology Innovation & Solutions Transportation Trucking GE, Clean Energy Fuels Partner to Expand 'Natural Gas Highway' GE and Clean Energy Fuels announced a collaboration to expand the infrastructure for natural gas transportation in the United States. The agreement supports Clean Energy's efforts in developing America's Natural Gas Highway, a fueling network that will enable trucks to operate on liquefied natural gas coast to coast and border to border. Clean Energy Fuels will initially purchase two ecomagination-qualified

134

STATEMENT OF CONSIDERATIONS REQUEST BY GE ENERGY (USA) LLC, FOR AN ADVANCE WAIVER OF  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

902; W(A)-2012-019; CH-1662 902; W(A)-2012-019; CH-1662 GE Energy (USA) LLC (GE), requests an advance waiver of domestic and foreign patent rights for all subject inventions made under the above cooperative agreement for work entitled, "Seeping Studies to Evaluate the Benefits of an Advanced Dry Feed System on the Use of Low-Rank Coal". Under this agreement, GE will demonstrate the advantage of using GE's new, advanced dry feed system (Posimetric Feed System-PFS) for converting low rank coal to electrical power in an IGCC plant configured for 90% Carbon Capture Utilization and Storage (CCUS). The PFS is centered on GE's proprietary Posimetric Feeder, a mechanical device that behaves like a particulate solids pump and is capable of pressurizing dry, ground coal to over 100 psi

135

Titan Propels GE Wind Turbine Research into New Territory | ornl.gov  

NLE Websites -- All DOE Office Websites (Extended Search)

Features Features 2014 2013 2012 2011 2010 News Home | ORNL | News | Features | 2013 SHARE Titan Propels GE Wind Turbine Research into New Territory Simulations of freezing water can help engineers design better blades GE simulated hundreds of water droplets, each including one million molecules. Simulations accelerated at least 200 times over pre-GPU estimates permitting GE to study the nucleation of individual ice molecules.Vizualization by M. Matheson (ORNL) GE simulated hundreds of water droplets, each including one million molecules. Simulations accelerated at least 200 times over pre-GPU estimates permitting GE to study the nucleation of individual ice molecules.Vizualization by M. Matheson (ORNL) (hi-res image) The amount of global electricity supplied by wind, the world's fastest

136

BTATEMENT OF CONBZDRUATIOHN REQUEST BY GENERAL ELECTRIC COMPANY(GE) FOR AN ADVANCED WAIVER OF  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

DEC. -15' 97(MON) 00:19 IPL DO DEC. -15' 97(MON) 00:19 IPL DO TEL:I 630 5 2779 P. 002 BTATEMENT OF CONBZDRUATIOHN REQUEST BY GENERAL ELECTRIC COMPANY(GE) FOR AN ADVANCED WAIVER OF DOMESTIC AND FOREIGN INVENTION RIGHTS UNDER COOPERATIVE AGREEMENT NO. DE-FC36-97GO10236, W(A)-97-024, CH-0929 The Petitioner, General Electric Company (GE), was awarded this cooperative agreement in response to a proposal for an affordable compact fluorescent lamp (CFL). The initial phase of this work is being performed under DOE Contract No. DE-FC36-97G010236. GE has requested a waiver of domestic and foreign patent rights for all subject inventions under this agreement. As brought out in GE's response to questions 2& 3, the total estimated cost of the project is $1,117,342 with GE paying 25% and DOE providing the balance.

137

Mn solid solutions in self-assembled Ge/Si (001) quantum dot heterostructures  

SciTech Connect

Heteroepitaxial Ge{sub 0.98}Mn{sub 0.02} quantum dots (QDs) on Si (001) were grown by molecular beam epitaxy. The standard Ge wetting layer-hut-dome-superdome sequence was observed, with no indicators of second phase formation in the surface morphology. We show that Mn forms a dilute solid solution in the Ge quantum dot layer, and a significant fraction of the Mn partitions into a sparse array of buried, Mn-enriched silicide precipitates directly underneath a fraction of the Ge superdomes. The magnetic response from the ultra-thin film indicates the absence of robust room temperature ferromagnetism, perhaps due to anomalous intermixing of Si into the Ge quantum dots.

Kassim, J.; Nolph, C.; Reinke, P.; Floro, J. [Department of Materials Science and Engineering, University of Virginia, Charlottesville, Virginia 22904 (United States); Jamet, M. [Institut Nanosciences et Cryogenie/SP2M, CEA-UJF, F-38054 Grenoble (France)

2012-12-10T23:59:59.000Z

138

An ultra-thin buffer layer for Ge epitaxial layers on Si  

SciTech Connect

Using an Fe{sub 3}Si insertion layer, we study epitaxial growth of Ge layers on a Si substrate by a low-temperature molecular beam epitaxy technique. When we insert only a 10-nm-thick Fe{sub 3}Si layer in between Si and Ge, epitaxial Ge layers can be obtained on Si. The detailed structural characterizations reveal that a large lattice mismatch of {approx}4% is completely relaxed in the Fe{sub 3}Si layer. This means that the Fe{sub 3}Si layers can become ultra-thin buffer layers for Ge on Si. This method will give a way to realize a universal buffer layer for Ge, GaAs, and related devices on a Si platform.

Kawano, M.; Yamada, S.; Tanikawa, K.; Miyao, M.; Hamaya, K. [Department of Electronics, Kyushu University, 744 Motooka, Fukuoka 819-0395 (Japan)] [Department of Electronics, Kyushu University, 744 Motooka, Fukuoka 819-0395 (Japan); Sawano, K. [Advanced Research Laboratories, Tokyo City University, 8-15-1 Todoroki, Tokyo 158-0082 (Japan)] [Advanced Research Laboratories, Tokyo City University, 8-15-1 Todoroki, Tokyo 158-0082 (Japan)

2013-03-25T23:59:59.000Z

139

Heat capacity of low temperature Ge- and Si-calorimeters and optimization of As-implanted silicon thermistors  

E-Print Network (OSTI)

Heat capacity of low temperature Ge- and Si-calorimeters and optimization of As-implanted silicon thermistors

Alessandrello, A; Cerofolini, G F; Fiorini, Ettore; Giuliani, A; Liguori, C; Meda, L; Niinikoski, T O; Rijllart, A

1988-01-01T23:59:59.000Z

140

Depth Profiles of Radionuclides Induced in Shielding Concrete of the 12 GeV Proton Accelerator Facility at KEK  

E-Print Network (OSTI)

Depth Profiles of Radionuclides Induced in Shielding Concrete of the 12 GeV Proton Accelerator Facility at KEK

Miura, T; Ishihama, S; Ohotsuka, N; Kunifuda, T

2000-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ge appliances ge" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


141

First Measurements of the Longitudinal Bunch Profile at SLAC Using Coherent Smith-Purcell Radiation at 28GeV  

E-Print Network (OSTI)

First Measurements of the Longitudinal Bunch Profile at SLAC Using Coherent Smith-Purcell Radiation at 28GeV

Blackmore, V; Doucas, G; Kimmitt, M F; Molloy, S; Ottewell, B; Perry, C; Woods, M

2008-01-01T23:59:59.000Z

142

Hot-Wire Deposition of Hydrogenated Nanocrystalline SiGe Films for Thin-Film Si Based Solar Cells  

E-Print Network (OSTI)

Hot-Wire Deposition of Hydrogenated Nanocrystalline SiGe Films for Thin-Film Si Based Solar Cells bandgap absorber in an a-Si/a-SiGe/nc-SiGe(nc- Si) triple-junction solar cell due to its higher optical investigations of nc-SiGe:H thin films made by hot-wire chemical vapor deposition (HWCVD) with a coil

Deng, Xunming

143

Search for Heavy Majorana Neutrinos in Same-Sign mumu+jets and ee+jets Events in pp Collisions at sqrt(s) = 7 GeV  

E-Print Network (OSTI)

cut (GeV) Predicted MC truth Ratio Table 6.6: Predicted andcut (GeV) Predicted MC truth Ratio Table 6.7: Predicted and

Giordano, Ferdinando

2013-01-01T23:59:59.000Z

144

Tuning the properties of Ge-quantum dots superlattices in amorphous silica matrix through deposition conditions  

Science Conference Proceedings (OSTI)

In this work, we investigate the structural properties of Ge quantum dot lattices in amorphous silica matrix, prepared by low-temperature magnetron sputtering deposition of (Ge+SiO{sub 2})/SiO{sub 2} multilayers. The dependence of quantum dot shape, size, separation, and arrangement type on the Ge-rich (Ge + SiO{sub 2}) layer thickness is studied. We show that the quantum dots are elongated along the growth direction, perpendicular to the multilayer surface. The size of the quantum dots and their separation along the growth direction can be tuned by changing the Ge-rich layer thickness. The average value of the quantum dots size along the lateral (in-plane) direction along with their lateral separation is not affected by the thickness of the Ge-rich layer. However, the thickness of the Ge-rich layer significantly affects the quantum dot ordering. In addition, we investigate the dependence of the multilayer average atomic composition and also the quantum dot crystalline quality on the deposition parameters.

Pinto, S. R. C.; Ramos, M. M. D.; Gomes, M. J. M. [University of Minho, Centre of Physics and Physics Department, Braga 4710-057 (Portugal); Buljan, M. [Ruder Boskovic Institute, Bijenicka cesta 54, Zagreb 10000 (Croatia); Chahboun, A. [University of Minho, Centre of Physics and Physics Department, Braga 4710-057 (Portugal); Physics Department, FST Tanger, Tanger BP 416 (Morocco); Roldan, M. A.; Molina, S. I. [Departamento de Ciencia de los Materiales e Ing. Metalurgica y Q. I., Universidad de Cadiz, Cadiz (Spain); Bernstorff, S. [Sincrotrone Trieste, SS 14 km163, 5, Basovizza 34012 (Italy); Varela, M.; Pennycook, S. J. [Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States); Barradas, N. P.; Alves, E. [Instituto Superior Tecnico e Instituto Tecnologico e Nuclear-, EN10, Sacavem 2686-953 (Portugal)

2012-04-01T23:59:59.000Z

145

Tuning the properties of Ge-quantum dots superlattices in amorphous silica matrix through deposition conditions  

Science Conference Proceedings (OSTI)

In this work, we investigate the structural properties of Ge quantum dot lattices in amorphous silica matrix, prepared by low-temperature magnetron sputtering deposition of (Ge+SiO{sub 2})/SiO{sub 2} multilayers. The dependence of quantum dot shape, size, separation, and arrangement type on the Ge-rich (Ge + SiO{sub 2}) layer thickness is studied. We show that the quantum dots are elongated along the growth direction, perpendicular to the multilayer surface. The size of the quantum dots and their separation along the growth direction can be tuned by changing the Ge-rich layer thickness. The average value of the quantum dots size along the lateral (in-plane) direction along with their lateral separation is not affected by the thickness of the Ge-rich layer. However, the thickness of the Ge-rich layer significantly affects the quantum dot ordering. In addition, we investigate the dependence of the multilayer average atomic composition and also the quantum dot crystalline quality on the deposition parameters.

Pinto, S. [University of Minho, Portugal; Roldan Gutierrez, Manuel A [ORNL; Ramos, M. M.D. [University of Minho, Portugal; Gomes, M.J.M. [University of Minho, Portugal; Molina, S. I. [Universidad de Cadiz, Spain; Pennycook, Stephen J [ORNL; Varela del Arco, Maria [ORNL; Buljan, M. [R. Boskovic Institute, Zagreb, Croatia; Barradas, N. [Instituto Tecnologico e Nuclear (ITN), Lisbon, Portugal; Alves, E. [Instituto Tecnologico e Nuclear (ITN), Lisbon, Portugal; Chahboun, A. [FST Tanger, Morocco; Bernstorff, S. [Sincrotrone Trieste, Basovizza, Italy

2012-01-01T23:59:59.000Z

146

Hydrogen Sensor Based on Pd/GeO{sub 2} Using a Low Cost Electrochemical Deposition  

Science Conference Proceedings (OSTI)

This work reports on a synthesis of sub micron germanium dioxide (GeO{sub 2}) on porous silicon (PS) by electrochemical deposition. n-type Si (100) wafer was used to fabricate (PS) using conventional method of electrochemical etching in HF based solution. A GeCl{sub 4} was directly hydrolyzed by hydrogen peroxide to produce pure GeO{sub 2}, and then electrochemically deposited on PS. Followed by palladium (Pd) contact on GeO{sub 2} /PS was achieved by using RF sputtering technique. The grown GeO{sub 2} crystals were characterized using SEM and EDX. I-V characteristics of Pd/ GeO{sub 2} were recorded before and after hydrogen gas exposure as well as with different H{sub 2} concentrations and different applied temperatures. The sensitivity of Pd/ GeO{sub 2} also has been investigated it could be seen to increase significantly with increased hydrogen concentration while it decreased with increase temperature.

Jawad, M. J.; Hashim, M. R. [School of Physics, Universiti Sains Malaysia, 11800-Penang (Malaysia); Ali, N. K. [Material Innovations and Nanoelectronics Research Group, Faculty of Electrical Engineering, Department of electronic engineering, Universiti Teknologi Malaysia, 81310 Skudai, Johor (Malaysia)

2011-05-25T23:59:59.000Z

147

In situ control of As dimer orientation on Ge(100) surfaces  

Science Conference Proceedings (OSTI)

We investigated the preparation of single domain Ge(100):As surfaces in a metal-organic vapor phase epitaxy reactor. In situ reflection anisotropy spectra (RAS) of vicinal substrates change when arsenic is supplied either by tertiarybutylarsine or by background As{sub 4} during annealing. Low energy electron diffraction shows mutually perpendicular orientations of dimers, scanning tunneling microscopy reveals distinct differences in the step structure, and x-ray photoelectron spectroscopy confirms differences in the As coverage of the Ge(100):As samples. Their RAS signals consist of contributions related to As dimer orientation and to step structure, enabling precise in situ control over preparation of single domain Ge(100):As surfaces.

Brueckner, Sebastian; Doescher, Henning [Helmholtz-Zentrum Berlin, Hahn-Meitner-Platz 1, 14109 Berlin (Germany); Technische Universitaet Ilmenau, Institut fuer Physik, Postfach 10 05 65, 98684 Ilmenau (Germany); Supplie, Oliver; Luczak, Johannes [Helmholtz-Zentrum Berlin, Hahn-Meitner-Platz 1, 14109 Berlin (Germany); Barrigon, Enrique; Rey-Stolle, Ignacio [Instituto de Energia Solar, Universidad Politecnica de Madrid, Avda. Complutense s/n, 28040 Madrid (Spain); Kleinschmidt, Peter [Helmholtz-Zentrum Berlin, Hahn-Meitner-Platz 1, 14109 Berlin (Germany); CiS Forschungsinstitut fuer Mikrosensorik und Photovoltaik GmbH, Konrad-Zuse-Strasse 14, 99099 Erfurt (Germany); Hannappel, Thomas [Helmholtz-Zentrum Berlin, Hahn-Meitner-Platz 1, 14109 Berlin (Germany); Technische Universitaet Ilmenau, Institut fuer Physik, Postfach 10 05 65, 98684 Ilmenau (Germany); CiS Forschungsinstitut fuer Mikrosensorik und Photovoltaik GmbH, Konrad-Zuse-Strasse 14, 99099 Erfurt (Germany)

2012-09-17T23:59:59.000Z

148

Electroluminescence from Strained Ge membranes and Implications for an Efficient Si-Compatible Laser  

E-Print Network (OSTI)

We demonstrate room-temperature electroluminescence (EL) from light-emitting diodes (LED) on highly strained germanium (Ge) membranes. An external stressor technique was employed to introduce a 0.76% bi-axial tensile strain in the active region of a vertical PN junction. Electrical measurements show an on-off ratio increase of one order of magnitude in membrane LEDs compared to bulk. The EL spectrum from the 0.76% strained Ge LED shows a 100nm redshift of the center wavelength because of the strain-induced direct band gap reduction. Finally, using tight-binding and FDTD simulations, we discuss the implications for highly efficient Ge lasers.

Nam, Donguk; Cheng, Szu-Lin; Roy, Arunanshu; Huang, Kevin Chih-Yao; Brongersma, Mark; Nishi, Yoshio; Saraswat, Krishna

2012-01-01T23:59:59.000Z

149

GeV EMISSION FROM COLLISIONAL MAGNETIZED GAMMA-RAY BURSTS  

Science Conference Proceedings (OSTI)

Magnetic fields may play a dominant role in gamma-ray bursts, and recent observations by Fermi indicate that GeV radiation, when detected, arrives delayed by seconds from the onset of the MeV component. Motivated by this, we discuss a magnetically dominated jet model where both magnetic dissipation and nuclear collisions are important. We show that, for parameters typical of the observed bursts, such a model involving a realistic jet structure can reproduce the general features of the MeV and a separate GeV radiation component, including the time delay between the two. The model also predicts a multi-GeV neutrino component.

Meszaros, P. [Department of Astronomy and Astrophysics, Department of Physics and Center for Particle Astrophysics, 525 Davey Lab., Pennsylvania State University, University Park, PA 16802 (United States); Rees, M. J. [Institute of Astronomy, University of Cambridge, Cambridge CB3 0HA (United Kingdom)

2011-06-01T23:59:59.000Z

150

GE power generation technology challenges for advanced gas turbines  

SciTech Connect

The GE Utility ATS is a large gas turbine, derived from proven GEPG designs and integrated GEAE technology, that utilizes a new turbine cooling system and incorporates advanced materials. This system has the potential to achieve ATS objectives for a utility sized machine. Combined with use of advanced Thermal Barrier Coatings (TBC`s), the new cooling system will allow higher firing temperatures and improved cycle efficiency that represents a significant improvement over currently available machines. Developing advances in gas turbine efficiency and emissions is an ongoing process at GEPG. The third generation, ``F`` class, of utility gas turbines offers net combined cycle efficiencies in the 55% range, with NO{sub x} programs in place to reduce emissions to less than 10 ppM. The gas turbines have firing temperatures of 2350{degree}F, and pressure ratios of 15 to 1. The turbine components are cooled by air extracted from the cycle at various stages of the compressor. The heat recovery cycle is a three pressure steam system, with reheat. Throttle conditions are nominally 1400 psi and 1000{degree}F reheat. As part of GEPG`s ongoing advanced power generation system development program, it is expected that a gas fired advanced turbine system providing 300 MW power output greater than 58% net efficiency and < 10 ppM NO{sub x} will be defined. The new turbine cooling system developed with technology support from the ATS program will achieve system net efficiency levels in excess of 60%.

Cook, C.S.; Nourse, J.G.

1993-11-01T23:59:59.000Z

151

APPROACHING CRYOGENIC GE PERFORMANCE WITH PELTIER COOLED CDTE  

Science Conference Proceedings (OSTI)

A new class of hand-held, portable spectrometers based on large area (lcm2) CdTe detectors of thickness up to 3mm has been demonstrated to produce energy resolution of between 0.3 and 0.5% FWHM at 662 keV. The system uses a charge loss correction circuit for improved efficiency, and detector temperature stabilization to ensure consistent operation of the detector during field measurements over a wide range of ambient temperature. The system can operate continuously for up to 8hrs on rechargeable batteries. The signal output from the charge loss corrector is compatible with most analog and digital spectroscopy amplifiers and multi channel analyzers. Using a detector measuring 11.2 by 9.1 by 2.13 mm3, we have recently been able to obtain the first wide-range plutonium gamma-ray isotopic analysis with other than a cryogenically cooled germanium spectrometer. The CdTe spectrometer is capable of measuring small plutonium reference samples in about one hour, covering the range from low to high burnup. The isotopic analysis software used to obtain these results was FRAM, Version 4 from LANL. The new spectrometer is expected to be useful for low-grade assay, as well as for some in-situ plutonium gamma-ray isotopics in lieu of cryogenically cooled Ge.

Khusainov, A. K. (A. Kh.); Iwanczyk, J. S. (Jan S.); Patt, B. E. (Bradley E.); Prirogov, A. M. (Alexandre M.); Vo, Duc T.

2001-01-01T23:59:59.000Z

152

Measurement of the Inclusive Charm Cross Section at 4.03 GeV and 4.14 GeV  

E-Print Network (OSTI)

The cross section for charmed meson production at $\\sqrt{s} = 4.03 $ and 4.14 GeV has been measured with the Beijing Spectrometer. The measurement was made using 22.3 $pb^{-1}$ of $e^+e^-$ data collected at 4.03 GeV and 1.5 $pb^{-1}$ of $e^+e^-$ data collected at 4.14 GeV. Inclusive observed cross sections for the production of charged and neutral D mesons and momentum spectra are presented. Observed cross sections were radiatively corrected to obtain tree level cross sections. Measurements of the total hadronic cross section are obtained from the charmed meson cross section and an extrapolation of results from below the charm threshold.

Bai, J Z; Bian, J G; Blum, I; Chen, G P; Chen, H F; Chen, J; Chen, J C; Chen, Y; Chen, Y B; Chen, Y Q; Cheng Bao Sen; Cui, X Z; Ding, H L; Dong, L Y; Du, Z Z; Dunwoodie, W M; Gao, C S; Gao, M L; Gao, S Q; Gratton, P; Gu, J H; Gu, S D; Gu, W X; Gu, Y F; Guo, Y N; Guo, Z J; Han, S W; Han, Y; Harris, F A; He, J; He, J T; He, K L; He, M; Heng, Y K; Hitlin, D G; Hu, G Y; Hu, H M; Hu, J L; Hu, Q H; Hu, T; Hu, X Q; Huang, Y Z; Huang, G S; Izen, J M; Jiang, C H; Jin, Y; Jones, B D; Ju, X; Ke, Z J; Kelsey, M H; Kim, B K; Kong, D; Lai, Y F; Lang, P F; Lankford, A; Li, C G; Li, D; Li, H B; Li, J; Li, J C; Li, P Q; Li, R B; Li, W; Li, W G; Li, X H; Li, X N; Liu, H M; Liu, J; Liu, R G; Liu, Y; Lou, X C; Lowery, B; Lu, F; Lu, J G; Luo, X L; Ma, E C; Ma, J M; Malchow, R; Mandelkern, M A; Mao, H S; Mao, Z P; Meng, X C; Nie, J; Olsen, S L; Oyang, J; Paluselli, D; Pan, L J; Panetta, J; Porter, F; Qi, N D; Qi, X R; Qian, C D; Qiu, J F; Qu, Y H; Que, Y K; Rong, G; Schernau, M; Schmid, B; Schultz, J; Shao, Y Y; Shen, B W; Shen, D L; Shen, H; Shen, X Y; Sheng, H Y; Shi, H Z; Song, X F; Standifird, J; Stoker, D; Sun, F; Sun, H S; Sun, Y; Sun, Y Z; Tang, S Q; Toki, W; Tong, G L; Varner, G S; Wang, F; Wang, L S; Wang, L Z; Wang, M; Wang, P; Wang, P L; Wang, S M; Wang, T J; Wang, Y Y; Weaver, M; Wei, C L; Wu, N; Wu, Y G; Xi, D M; Xia, X M; Xie, P P; Xie, Y; Xie, Y H; Xu, G F; Xue, S T; Yan, J; Yan, W G; Yang, C M; Yang, C Y; Yang, H X; Yang, J; Yang, W; Yang, X F; Ye, M H; Ye, S W; Ye, Y X; Yu, C S; Yu, C X; Yu, G W; Yu, Y H; Yu, Z Q; Yuan, C Z; Yuan, Y; Zhang, B Y; Zhang, C; Zhang, C C; Zhang, D H; Zhang, H L; Zhang, J; Zhang, J W; Zhang, L; Zhang, L S; Zhang, P; Zhang, Q J; Zhang, S Q; Zhang, X Y; Zhang, Y Y; Zhao, D X; Zhao, H W; Zhao, J W; Zhao, M; Zhao, W R; Zhao, Z G; Zheng, J P; Zheng, L S; Zheng, Z P; Zhou, B Q; Zhou, G P; Zhou, H S; Zhou, L; Zhu, K J; Zhu, Q M; Zhu, Y C; Zhu, Y S; Zhuang, B A

2000-01-01T23:59:59.000Z

153

Two GeV Electrons Achieved by Laser Plasma Wakefield Acceleration | U.S.  

Office of Science (SC) Website

Two GeV Electrons Achieved by Laser Plasma Wakefield Acceleration Two GeV Electrons Achieved by Laser Plasma Wakefield Acceleration High Energy Physics (HEP) HEP Home About Research Facilities Science Highlights Benefits of HEP Funding Opportunities Advisory Committees News & Resources Contact Information High Energy Physics U.S. Department of Energy SC-25/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-3624 F: (301) 903-2597 E: sc.hep@science.doe.gov More Information » July 2013 Two GeV Electrons Achieved by Laser Plasma Wakefield Acceleration Scientists at University of Texas, Austin, accelerate electrons to 2 GeV in table top apparatus. Print Text Size: A A A Subscribe FeedbackShare Page Click to enlarge photo. Enlarge Photo Image courtesy of Neil Fazel The inside of the University of Texas, Austin, vacuum chamber where

154

STATEMENT OF CONSIDERATIONS REQUEST BY GE ENERGY (USA) LLC, FOR AN ADVANCE WAIVER OF  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

859; W(A)-2012-018 859; W(A)-2012-018 ; CH-1661 GE Energy (USA) LLC (GE), requests an advance waiver of domestic and foreign patent rights for all subject inventions made under the above cooperative agreement for work entitled , "Feasibility Studies to Improve Plant Availability and Reduce Total Installed Cost in IGCC Plants". Under this agreement, GE will evaluate several factors that make the cost of implementing integrated gasification combined cycle (IGCC) power production challenging . Specifically, GE will evaluate the effects on total installed cost and availability through deployment of a multi-faceted approach in three areas: Technology Evaluation ; Constructability; and , Design methodology. The end result is to reduce the time to technologica l maturity and enable plants to reach higher

155

Energy Secretary Chu to Tour GE Global Research Advanced Manufacturing Lab  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Tour GE Global Research Advanced Tour GE Global Research Advanced Manufacturing Lab Energy Secretary Chu to Tour GE Global Research Advanced Manufacturing Lab May 24, 2012 - 10:54am Addthis WASHINGTON - On Friday, May 25, 2012, U.S. Energy Secretary Steven Chu will visit GE Global Research in Niskayuna, New York, where he will tour the company's advanced manufacturing lab. Secretary Chu will highlight the economic opportunities in the clean energy economy as well as advanced manufacturing's potential to save American companies time and money while supporting efficient innovative product engineering and development. Following his tour, Secretary Chu will speak at Rensselaer Polytechnic Institute's Commencement Colloquy. On Saturday, May 26, Secretary Chu will participate in the university's commencement ceremonies as an

156

Another SunShot Success: GE to Make PrimeStar Solar Panels at New Colorado  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Another SunShot Success: GE to Make PrimeStar Solar Panels at New Another SunShot Success: GE to Make PrimeStar Solar Panels at New Colorado Plant Another SunShot Success: GE to Make PrimeStar Solar Panels at New Colorado Plant October 14, 2011 - 4:03pm Addthis Thin film solar panels produced by General Electric’s PrimeStar in Arvada, Colorado | Image courtesy of Edelman. Thin film solar panels produced by General Electric's PrimeStar in Arvada, Colorado | Image courtesy of Edelman. Minh Le Minh Le Program Manager, Solar Program Yesterday, General Electric (GE) announced that it will build a new thin-film photovoltaic (PV) solar panel manufacturing facility in Aurora, Colorado, to produce highly-efficient, low-cost panels that are based on innovative technology originally developed at the Energy Department's

157

New GE Plant to Produce Thin Film PV Solar Panels Based on NREL Technology  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

New GE Plant to Produce Thin Film PV Solar Panels Based on NREL New GE Plant to Produce Thin Film PV Solar Panels Based on NREL Technology New GE Plant to Produce Thin Film PV Solar Panels Based on NREL Technology April 22, 2011 - 10:17am Addthis Photo courtesy of General Electric Photo courtesy of General Electric Minh Le Minh Le Program Manager, Solar Program Earlier this month, General Electric announced plans to enter the global marketplace for solar photovoltaic (PV) panels in a big way - and to do it, they will be using technology pioneered at the Department of Energy's National Renewable Energy Lab (NREL). The record-breaking Cadmium-Telluride (CdTe) thin film photovoltaic technology GE has chosen for its solar panels was originally developed more than a decade ago by a team of scientists led by NREL's Xuanzhi Wu, and

158

STATEMENT OF CONSIDERATIONS REQUEST BY GENERAL ELECTRIC COMPANY (GE) FOR AN  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

(GE) FOR AN (GE) FOR AN ADVANCE WAIVER OF DOMESTIC AND FOREIGN RIGHTS TO INVENTIONS MADE UNDER COOPERATIVE AGREEMENT NUMBER DE-FC04-2002AL68080, DOE WAIVER NO. W(A) 03-003. The Petitioner, GE, has requested a waiver of all domestic and foreign patent rights to inventions that may be conceived or first actually reduced to practice in the course of GE's work under Cooperative Agreement Number DE-FC04-2002AL68080 entitled "Advanced Hybrid Propulsion and Energy Management System for High Efficiency, Off- Highway, 320 Ton Class, Diesel Electric Haul Trucks." The work to be done under the cooperative agreement will be the design, fabrication and demonstration of a hybrid propulsion and energy management system for off-highway vehicles used in mining applications. The hybrid propulsion system would allow for an

159

STATEMENT OF CONSIDERATIONS PETITION FOR ADVANCE WAIVER OF PATENT RIGHTS BY GE  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

181 BETWEEN GE GLOBAL AND 181 BETWEEN GE GLOBAL AND DOE; W(A)-09-016; CH-1485 The Petitioner, GE GLOBAL, has requested a waiver of domestic and certain foreign patent rights for all subject inventions that may be conceived or first actually reduced to practice by GE GLOBAL arising from its participation under the above referenced cooperative agreement entitled "300°c Capable Electronics Platform and Temperature Sensor System for Enhanced Geothermal Systems." The objective of the project is development of geothermal well bore monitoring applications, through the development of SiC based electronics and ceramic packaging capable of sustained operation at temperatures up to 300°C and 10km depth. The total cost of the project is approximately $2 million with the Petitioner

160

Ge-on-Si Integrated Photonics: New Tricks from an Old Semiconductor  

E-Print Network (OSTI)

We review recent progress in Ge active photonic devices for electronic-photonic integration on Si, demonstrating new tricks in optoelectronics from this old semiconductor material used for the first transistor more than ...

Jifeng, Liu

Note: This page contains sample records for the topic "ge appliances ge" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


161

Thermal interface conductance in Si/Ge superlattices by equilibrium molecular dynamics  

E-Print Network (OSTI)

We provide a derivation allowing the calculation of thermal conductance at interfaces by equilibrium molecular dynamics simulations and illustrate our approach by studying thermal conduction mechanisms in Si/Ge superlattices. ...

Esfarjani, Keivan

162

Structural and magnetic properties of MBE grown GeMnN2 thin films  

Science Conference Proceedings (OSTI)

Epitaxial GeMnN{sub 2} thin films are synthesized by plasma-assisted molecular beam epitaxy. Transmission electron microscopy and x-ray diffraction measurements confirm that it is the orthorhombic variant, consistent with the predictions of first-principles calculations. The magnetic properties of the films are related to defects, with samples grown under Ge-rich conditions exhibiting a net magnetic moment above room temperature. These results are explained by first-principles calculations, indicating that the preferential substitution of one magnetic sublattice of GeMnN{sub 2} by impurities and/or intrinsic defects such as Ge antisites produces a net magnetic moment in an antiferromagnetic background, and also introduces spin-polarized carriers near the Fermi level.

Liu, Y [University of Wisconsin, Milwaukee; Lazarov, V. K. [University of Wisconsin, Milwaukee; Cheung, S.H. [University of Wisconsin, Milwaukee; Keavney, D.J. [Argonne National Laboratory (ANL); Gai, Zheng [ORNL; Gajdardziska-Josifovska, M [University of Wisconsin, Milwaukee; Weinert, M [University of Wisconsin, Milwaukee; Li, Lian [University of Wisconsin, Milwaukee

2012-01-01T23:59:59.000Z

163

Microsoft Word - 41889_GE_IGCC Syst Study_FactSheet_012405.doc  

NLE Websites -- All DOE Office Websites (Extended Search)

GE Energy 1 December 2004 Project No. DE-FC26-03NT41889 System Study For Improved Gas Turbine Performance For Coal IGCC Application Fact Sheet I Project Participants: A. Prime...

164

e+e- pair production from 10 GeV to 10 ZeV  

E-Print Network (OSTI)

e + e ? Pair Production from 10 GeV to 10 ZeV Spencer R.very high energies, pair production (? ? e + e ? ) exhibitsatoms reduces the pair production cross section considerably

Klein, Spencer R.

2004-01-01T23:59:59.000Z

165

GE, Berkeley Lab-EETD Explore Possible Key to Energy Storage...  

NLE Websites -- All DOE Office Websites (Extended Search)

GE, Berkeley Lab-EETD Explore Possible Key to Energy Storage for Electric Vehicles August 2013 From a General Electric press release: It's a little more complex than making instant...

166

Direct gap photoluminescence of n-type tensile-strained Ge-on-Si  

E-Print Network (OSTI)

Room temperature direct gap photoluminescence (PL) was observed from n-type tensile-strained epitaxial Ge-on-Si. The PL intensity increases with n-type doping due to a higher electron population in the direct ? valley as ...

Sun, Xiaochen

167

SiGe-On-Insulator (SGOI): Two Structures for CMOS Application  

E-Print Network (OSTI)

Two SiGe-on-insulator (SGOI) structures for CMOS application are presented: surface-channel strained-Si on SGOI (SSOI) and dual-channel SGOI structures. Comparisons between two structures are made from both device performance ...

Cheng, Zhiyuan

168

Optical gain and lasing from band-engineered Ge-on-Si at room temperature  

E-Print Network (OSTI)

We present theoretical modeling and experimental results of optical gain and lasing from tensile-strained, n[superscript +] Ge-on-Si at room temperature. Compatible with silicon CMOS, these devices are ideal for large-scale ...

Liu, Jifeng

169

High active carrier concentration in n-type, thin film Ge using delta-doping  

E-Print Network (OSTI)

We demonstrate CVD in situ doping of Ge by utilizing phosphorus delta-doping for the creation of a high dopant diffusion source. Multiple monolayer delta doping creates source phosphorous concentrations above 1 10[superscript ...

Cai, Yan

170

Room-temperature direct bandgap electroluminesence from Ge-on-Si light-emitting diodes  

E-Print Network (OSTI)

We report what we believe to be the first demonstration of direct bandgap electroluminescence (EL) from Ge/Si heterojunction light-emitting diodes (LEDs) at room temperature. In-plane biaxial tensile strain is used to ...

Sun, Xiaochen

171

A market analysis for high efficiency multi-junction solar cells grown on SiGe  

E-Print Network (OSTI)

Applications, markets and a cost model are presented for III-V multi-junction solar cells built on compositionally graded SiGe buffer layers currently being developed by professors Steven Ringell of Ohio State University ...

Judkins, Zachara Steele

2007-01-01T23:59:59.000Z

172

XRY{*?C**kL,x*SGH]??*?*COLyc**? (rP??*0Ge ...  

Science Conference Proceedings (OSTI)

XRY{*?C**kL,x*SGH]??*?*COLyc**? (rP??*0Ge

2012-10-23T23:59:59.000Z

173

LS-35 6 GeV Light Source Storage Ring Quadrupole and Sextupole...  

NLE Websites -- All DOE Office Websites (Extended Search)

5 6 GeV Light Source Storage Ring Quadrupole and Sextupole Magnet Field Calculations Robert J. Lari September 23, 1985 Quadrupole Magnet Figure 1 shows the cross section of...

174

Design of 10 GeV laser wakefield accelerator stages with shaped laser modes  

E-Print Network (OSTI)

DESIGN OF 10 GEV LASER WAKEFIELD ACCELERATORSTAGES WITH SHAPED LASER MODES ? E. Cormier-Michel, E.PAL framework, of 10 GeV laser plasma wake?eld ac- celerator

Cormier-Michel, Estelle

2010-01-01T23:59:59.000Z

175

Energy Secretary Chu to Tour GE Global Research Advanced Manufacturing Lab  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

Secretary Chu to Tour GE Global Research Advanced Secretary Chu to Tour GE Global Research Advanced Manufacturing Lab Energy Secretary Chu to Tour GE Global Research Advanced Manufacturing Lab May 24, 2012 - 10:54am Addthis WASHINGTON - On Friday, May 25, 2012, U.S. Energy Secretary Steven Chu will visit GE Global Research in Niskayuna, New York, where he will tour the company's advanced manufacturing lab. Secretary Chu will highlight the economic opportunities in the clean energy economy as well as advanced manufacturing's potential to save American companies time and money while supporting efficient innovative product engineering and development. Following his tour, Secretary Chu will speak at Rensselaer Polytechnic Institute's Commencement Colloquy. On Saturday, May 26, Secretary Chu will participate in the university's commencement ceremonies as an

176

Surface Termination and Roughness of Ge(100) Cleaned by HF and HCl Solutions  

DOE Green Energy (OSTI)

Oxide removal from Ge(100) surfaces treated by HCl and HF solutions with different concentrations are systematically studied by synchrotron radiation photoelectron spectroscopy (SR-PES). SR-PES results show that clean surfaces without any oxide can be obtained after wet chemical cleaning followed by vacuum annealing with a residual carbon contamination of less than 0.02 monolayer. HF etching leads to a hydrogen terminated Ge surface whose hydrogen coverage is a function of the HF concentration. In contrast, HCl etching yields a chlorine terminated surface. Possible etching mechanisms are discussed. Surface roughness after HF and HCl treatments is also investigated by AFM, which shows that HF treatment leaves a rougher surface than HCl. Germanium (Ge) is increasingly being studied for MOSFET applications to take advantage of its high intrinsic electron and hole mobility. To fabricate high performance devices on Ge, it is essential to understand Ge surface chemistry and find an effective way to clean and passivate its surface. Although Si surface cleaning and passivation have been extensively studied, only recently has some research been done on Ge surfaces. Conventional XPS results show that HF etching removes Ge oxide and carbon contamination significantly, and HCl etching leads to a chlorine terminated Ge(111) surface, which only forms Ge monochloride. However, it is difficult to probe the details of the chemical nature of treated surfaces and quantify the surface termination and cleanness with conventional XPS, because of its limited surface sensitivity and resolution. In addition, little attention has been paid to the HF concentration, which turns out to be an important factor in the surface hydrogen passivation. In this work, we study the Ge(100) surfaces treated by aqueous HCl and HF solutions with three different concentrations by synchrotron radiation photoelectron spectroscopy (SR-PES) at Stanford Synchrotron Radiation Laboratory (SSRL). Using SR-PES, we can tune the photon energy to achieve very high surface sensitivity and good resolution, so the chemical states of treated surfaces can be resolved unambiguously, and the surface termination and cleanness can be quantified. We find that HF treatment results in a hydrogen terminated surface, and the hydrogen coverage depends on the HF concentration. In contrast, a Cl terminated Ge(100) surface is achieved after HCl treatment. Both monochloride and dichloride are formed on the surface. The termination difference between HF etching and HCl etching can be explained by the etching mechanism. In both cases, the residual carbon and oxygen after chemical etching can be removed by vacuum annealing.

Sun, Shiyu; /SLAC, SSRL

2005-10-10T23:59:59.000Z

177

Fragmentation studies of 158 A GeV Pb ions using CR39 nuclear track detectors  

E-Print Network (OSTI)

Six stacks of CR39 nuclear track detectors with different targets were exposed to a lead ion beam of 158 A GeV at the CERN-SPS, at normal incidence, in order to study the fragmentation properties of ultra-relativistic lead nuclei. Measurements of the total, break-up and pick-up charge-changing cross sections of 158 A GeV Pb ions have been made for the first time.

Dekhissi, H; Giorgini, M; Mandrioli, G; Manzoor, S; Patrizii, L; Popa, V; Serra, P; Togo, V

2000-01-01T23:59:59.000Z

178

Nanostructured ion beam-modified Ge films for high capacity Li ion battery anodes  

SciTech Connect

Nanostructured ion beam-modified Ge electrodes fabricated directly on Ni current collector substrates were found to exhibit excellent specific capacities during electrochemical cycling in half-cell configuration with Li metal for a wide range of cycling rates. Structural characterization revealed that the nanostructured electrodes lose porosity during cycling but maintain excellent electrical contact with the metallic current collector substrate. These results suggest that nanostructured Ge electrodes have great promise for use as high performance Li ion battery anodes.

Rudawski, N. G.; Darby, B. L.; Yates, B. R.; Jones, K. S. [Department of Materials Science and Engineering, University of Florida, Gainesville, Florida 32611-6400 (United States); Elliman, R. G. [Department of Electronic Materials Engineering, Research School of Physics and Engineering, Australian National University, Canberra, Australian Capital Territory 0200 (Australia); Volinsky, A. A. [Department of Mechanical Engineering, University of South Florida, Tampa Florida 33620 (United States)

2012-02-20T23:59:59.000Z

179

Distinct local electronic structure and magnetism for Mn in amorphous Si and Ge  

SciTech Connect

Transition metals such as Mn generally have large local moments in covalent semiconductors due to their partially filled d shells. However, Mn magnetization in group-IV semiconductors is more complicated than often recognized. Here we report a striking crossover from a quenched Mn moment (<0.1 {mu}{sub B}) in amorphous Si (a-Si) to a large distinct local Mn moment ({ge}3{mu}{sub B}) in amorphous Ge (a-Ge) over a wide range of Mn concentrations (0.005-0.20). Corresponding differences are observed in d-shell electronic structure and the sign of the Hall effect. Density-functional-theory calculations show distinct local structures, consistent with different atomic density measured for a-Si and a-Ge, respectively, and the Mn coordination number N{sub c} is found to be the key factor. Despite the amorphous structure, Mn in a-Si is in a relatively well-defined high coordination interstitial type site with broadened d bands, low moment, and electron (n-type) carriers, while Mn in a-Ge is in a low coordination substitutional type site with large local moment and holes (p-type) carriers. Moreover, the correlation between N{sub c} and the magnitude of the local moment is essentially independent of the matrix; the local Mn moments approach zero when N{sub c} > 7 for both a-Si and a-Ge.

Zeng, Li; Cao, J. X.; Helgren, E.; Karel, J.; Arenholz, E.; Ouyang, Lu; Smith, David J.; Wu, R. Q.; Hellman, F.

2010-06-01T23:59:59.000Z

180

One-Step Growth of Ge doped ZnO Tubes by Thermal Evaporation  

Science Conference Proceedings (OSTI)

In this paper we report a simple thermal evaporation technique (horizontal tube furnace) to grow the bulk-quantity of germanium (Ge) doped zinc oxide (ZnO) tubes on the Si substrate by using one-step thermal evaporation of a mixed powder of Ge and ZnO. The microstructure and optical properties of the Ge doped ZnO tubes have been investigated by scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction, photoluminescence (PL) spectrometer and Raman spectrometer. The investigation of structural properties indicated that the structures consist of bulk quantities of cylindrical rod and tube with diameter around 1micron. EDX reveals that the tube structures have Ge, Zn and O{sub 2} compositions and XRD analysis indicated the product is mainly composed of Ge, zinc germanium oxide (Zn{sub 2}GeO{sub 4}) and small proportion of ZnO. Room temperature photoluminescence (PL) spectrum shows broad emission peaks around 400 nm, opening up a route to potential applications in future optoelectronic devices. Raman measurement also measured at room temperature for these tubes.

Jumidali, M. M. [School of Physics, Universiti Sains Malaysia (USM), 11800 Minden, Penang (Malaysia); Faculty of Applied Science, Universiti Teknologi MARA, 13500 Penang (Malaysia); Hashim, M. R. [School of Physics, Universiti Sains Malaysia (USM), 11800 Minden, Penang (Malaysia); Sulieman, K. M. [Faculty of Applied Science, Universiti Teknologi MARA, 13500 Penang (Malaysia)

2011-03-30T23:59:59.000Z

Note: This page contains sample records for the topic "ge appliances ge" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


181

Ferromagnetism in Mn-Implanted Epitaxially Grown Ge on Si(100)  

SciTech Connect

We have studied ferromagnetism of Mn-implanted epitaxial Ge films on silicon. The Ge films were grown by ultrahigh vacuum chemical vapor deposition using a mixture of germane (GeH{sub 4}) and methylgermane (CH{sub 3}GeH{sub 3}) gases with a carbon concentration of less than 1 at. %, and observed surface rms roughness of 0.5 nm, as measured by atomic force microscopy. Manganese ions were implanted in epitaxial Ge films grown on Si (100) wafers to an effective concentration of 16, 12, 6, and 2 at. %. Superconducting quantum interference device measurements showed that only the three highest Mn concentration samples are ferromagnetic, while the fourth sample, with [Mn] = 2 at. %, is paramagnetic. X-ray absorption spectroscopy and x-ray magnetic circular dichroism measurements indicate that localized Mn moments are ferromagnetically coupled below the Curie temperature. Isothermal annealing of Mn-implanted Ge films with [Mn] = 16 at. % at 300 C for up to 1200 s decreases the magnetization but does not change the Curie temperature, suggesting that the amount of the magnetic phase slowly decreases with time at this anneal temperature. Furthermore, transmission electron microscopy and synchrotron grazing incidence x-ray diffraction experiments show that the Mn-implanted region is amorphous, and we believe that it is this phase that is responsible for the ferromagnetism. This is supported by our observation that high-temperature annealing leads to recrystallization and transformation of the material into a paramagnetic phase.

Guchhait, S.; Jamil, M.; Ohldag, H.; Mehta, A.; Arenholz, E.; Lian, G.; Li Fatou, A.; Ferrer, D. A.; Markert, J. T.; Colombo, L.; Banerjee, S. K.

2011-01-05T23:59:59.000Z

182

Microstructure study of the rare-earth intermetallic compounds R5(SixGe1-x)4 and R5(SixGe1-x)3  

SciTech Connect

The unique combination of magnetic properties and structural transitions exhibited by many members of the R{sub 5}(Si{sub x}Ge{sub 1-x}){sub 4} family (R = rare earths, 0 ? x ? 1) presents numerous opportunities for these materials in advanced energy transformation applications. Past research has proven that the crystal structure and magnetic ordering of the R{sub 5(Si{sub x}Ge{sub 1-x}){sub 4} compounds can be altered by temperature, magnetic field, pressure and the Si/Ge ratio. Results of this thesis study on the crystal structure of the Er{sub 5}Si{sub 4} compound have for the first time shown that the application of mechanical forces (i.e. shear stress introduced during the mechanical grinding) can also result in a structural transition from Gd{sub 5}Si{sub 4}-type orthorhombic to Gd{sub 5}Si{sub 2}Ge{sub 2}-type monoclinic. This structural transition is reversible, moving in the opposite direction when the material is subjected to low-temperature annealing at 500 ?C. Successful future utilization of the R{sub 5}(Si{sub x}Ge{sub 1-x}){sub 4} family in novel devices depends on a fundamental understanding of the structure-property interplay on the nanoscale level, which makes a complete understanding of the microstructure of this family especially important. Past scanning electron microscopy (SEM) observation has shown that nanometer-thin plates exist in every R{sub 5}(Si{sub x}Ge{sub 1-x}){sub 4} (5:4) phase studied, independent of initial parent crystal structure and composition. A comprehensive electron microscopy study including SEM, energy dispersive spectroscopy (EDS), selected area diffraction (SAD), and high resolution transmission electron microscopy (HRTEM) of a selected complex 5:4 compound based on Er rather than Gd, (Er{sub 0.9Lu{sub 0.1}){sub 5}Si{sub 4}, has produced data supporting the assumption that all the platelet-like features present in the R{sub 5}(Si{sub x}Ge{sub 1-x}){sub 4} family are hexagonal R{sub 5}(Si{sub x}Ge{sub 1-x}){sub 3} (5:3) phase and possess the same reported orientation relationship that exists for the Gd{sub 5}Ge{sub 4} and Gd{sub 5}Si{sub 2}Ge{sub 2} compounds, i.e. [010](102?){sub m} || [101?0](12?11){sub p}. Additionally, the phase identification in (Er{sub 0.9}Lu{sub 0.1}){sub 5}Si{sub 4} carried out using X-ray powder diffraction (XRD) techniques revealed that the low amount of 5:3 phase is undetectable in a conventional laboratory Cu K? diffractometer due to detection limitations, but that extremely low amounts of the 5:3 phase can be detected using high resolution powder diffraction (HRPD) employing a synchrotron source. These results suggest that use of synchrotron radiation for the study of R{sub 5}(Si{sub x}Ge{sub 1-x}){sub 4} compounds should be favored over conventional XRD for future investigations. The phase stability of the thin 5:3 plates in a Gd{sub 5}Ge{sub 4} sample was examined by performing long-term annealing at very high temperature. The experimental results indicate the plates are thermally unstable above 1200?C. While phase transformation of 5:3 to 5:4 occurs during the annealing, the phase transition is still fairly sluggish, being incomplete even after 24 hours annealing at this elevated temperature. Additional experiments using laser surface melting performed on the surface of a Ho{sub 5}(Si{sub 0.8}Ge{sub 0.}2){sub 4} sample showed that rapid cooling will suppress the precipitation of 5:3 plates. Bulk microstructure studies of polycrystalline and monocrystalline Gd{sub 5}Ge{sub 3} compounds examined using optical microscopy, SEM and TEM also show a series of linear features present in the Gd{sub 5}Ge{sub 3} matrix, similar in appearance in many ways to the 5:3 plates observed in R{sub 5}(Si{sub x}Ge{sub 1-x}){sub 4} compounds. A systematic microscopy analysis of these linear features revealed they also are thin plates with a stoichiometric composition of Gd{sub 5}Ge{sub 4} with an orthorhombic structure. The orientation relationship between the 5:3 matrix and the precipitate 5:4 thin plates was determined as [101?0] (12?11){s

Cao, Qing

2012-07-26T23:59:59.000Z

183

Circuit Breaker Maintenance; Volume 1: Low-Voltage Circuit Breakers; Part 2: GE AK Models: Volume 1: Low-Voltage Circuit Breakers Pa rt 2: GE AK Models  

Science Conference Proceedings (OSTI)

This comprehensive guide will help utilities improve their maintenance of GE model AK circuit breakers. It consolidates industry guidelines, applicable standards, original equipment manufacturer recommendations, and hands-on experience relative to these circuit breakers. Ultimately, improved maintenance will increase reliability and reduce costs associated with corrective maintenance and equipment downtime.

1992-05-02T23:59:59.000Z

184

Structural and electronic studies of a-SiGe:H alloys  

DOE Green Energy (OSTI)

This report describes work to produce alloys of a-Si[sub 1-x]Ge[sub x]:H of improved photoelectronic quality by plasma-enhanced chemical vapor deposition (PECVD). The goal was to discover optimum preparation conditions for the end-component, a-Ge:H, to establish whether modification of the usual practice of starting from a-Si:H preparation conditions was advisable. Such modification, found to be necessary, gave films of a-Ge:H with efficiency-mobility-lifetime products ([eta][mu][tau]) 10[sup 2] to 10[sup 3] higher than were earlier available, in homogeneous environmentally stable material. Both a-Ge:H and a-Si[sub 1-x]Ge[sub x]:H of large x were studied in detail. Alloy material was shown to have [eta][mu][tau] 10[sup 2] larger than found earlier. However, just as the [eta][mu][tau] of a-Si:H decreases when Ge is added, so also the [eta][mu][tau] of these alloys with Si addition. By contrast, the ambipolar diffusion lengths, L[sub o] which are governed by the hole mobility, vary by only a factor of two over the whole alloy series. Using the experimental finding of a small valence band offset between a-Si:H and a-Ge:H compositional fluctuations on a 10-mm scale are suggested to explain the behavior of [eta][mu][tau] and L[sub o] The implications for eventual improvement of the alloys are profound, but require direct experimental tests of the postulated compositional fluctuations.

Paul, W. (Harvard Univ., Cambridge, MA (United States))

1993-04-01T23:59:59.000Z

185

Investigations of the R5(SixGe1-x)4 Intermetallic Compounds by X-Ray Resonant Magnetic Scattering  

SciTech Connect

The XRMS experiment on the Gd{sub 5}Ge{sub 4} system has shown that, below the Neel temperature, T{sub N} = 127 K, the magnetic unit cells is the same as the chemical unit cell. From azimuth scans and the Q dependence of the magnetic scattering, all three Gd sites in the structure were determined to be in the same magnetic space group Pnma. The magnetic moments are aligned along the c-axis and the c-components of the magnetic moments at the three different sites are equal. The ferromagnetic slabs are stacked antiferromagnetically along the b-direction. They found an unusual order parameter curve in Gd{sub 5}Ge{sub 4}. A spin-reorientation transition is a possibility in Gd{sub 5}Ge{sub 4}, which is similar to the Tb{sub 5}Ge{sub 4} case. Tb{sub 5}Ge{sub 4} possesses the same Sm{sub 5}Ge{sub 4}-type crystallographic structure and the same magnetic space group as Gd{sub 5}Ge{sub 4} does. The difference in magnetic structure is that Tb{sub 5}Ge{sub 4} has a canted one but Gd{sub 5}Ge{sub 4} has nearly a collinear one in the low temperature antiferromagnetic phase. The competition between the magneto-crystalline anisotropy and the nearest-neighbor magnetic exchange interactions may allow a 3-dimensional canted antiferromagnetic structure in Tb{sub 5}Ge{sub 4}. The spin-reorientation transition in both Gd{sub 5}Ge{sub 4} and Tb{sub 5}Ge{sub 4} may arise from the competition between the magnetic anisotropy from the spin-orbit coupling of the conduction electrons and the dipolar interactions anisotropy.

Lizhi Tan

2008-08-18T23:59:59.000Z

186

Epitaxial growth of Dy2O3 thin films on epitaxial Dy-germanide films on Ge(001) substrates  

Science Conference Proceedings (OSTI)

Ultra-thin films of Dy are grown on Ge(001) substrates by molecular beam deposition near room temperature and immediately annealed for solid phase epitaxy at higher temperatures, leading to the formation of DyGe"x films. Thin films of Dy"2O"3 are grown ... Keywords: Dy2O3 film, Ge(001) substrate, High-? oxide, Molecular beam epitaxy (MBE), Structural characterization, Transmission electron microscopy (TEM)

Md. Nurul Kabir Bhuiyan; Mariela Menghini; Jin Won Seo; Jean-Pierre Locquet

2011-04-01T23:59:59.000Z

187

6 GeV LIGHT SOURCE PROJECT COST ESTIMATING PROCEDURE LS-34  

NLE Websites -- All DOE Office Websites (Extended Search)

GeV LIGHT SOURCE PROJECT GeV LIGHT SOURCE PROJECT COST ESTIMATING PROCEDURE LS-34 October 23, 1985 YC/AVR To maintain uniformity in estimating the cost requirements of the various components of the 6 GeV Light Source, the following procedure will be used by all the task groups. The procedure uses a Work Breakdown Structure (WBS) to break down the project into manageable, easy to estimate, components. The project is first broken down into major tasks or categories. Then each major division is continuously subdivided until the desired level of detail is achieved. This can be shown best by using the example of the WBS of the Aladdin Upgrade Project, excerpts of which are included in Appendix A. As shown in the example, the project is first divided into: 1.1 Project Management and Administration

188

The Linac Injector For The ANL 7 Ge V Advanced Photon Source  

NLE Websites -- All DOE Office Websites (Extended Search)

Injector For The ANL 7 Ge V Injector For The ANL 7 Ge V Advanced Photon Source A. Nassiri, W. Wesolowski, and G. Mavrogenes Argonne National Laboratory Submitted to the 1990 LINAC Conferece Albuquerque, New Mexico LS-154 9/28/90 TEE LINAC INJECTOR FOR TEE ANL 7 G<.iJ,V ADVANCED PHOTON SOORCE* A. Nassiri, W. Wesolowski, and G. Mavrogenes Argonne National Laboratory 9700 South Cass Avenue Argonne, IL 60439 USA Abstract The Argonne Advanced Photon Source (APS) linac system consists of a 200 MeV electron linac, a positron converter, and a 450 MeV positron linac. Design parameters and computer simulations of the two linac systems are presented. Introduction The Argonne Advanced Photon Source is a 7 GeV synchrotron X-Ray facility. The APS machine parameters have been described.

189

STATEMENT OF CONSIDERATIONS REQUEST BY GENERAL ELECTRIC GLOBAL RESEARCH, INC (GE) FOR AN  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

RESEARCH, INC (GE) FOR AN RESEARCH, INC (GE) FOR AN ADVANCE WAIVER OF DOMESTIC AND FOREIGN PATENT RIGHTS UNDER DOE AWARD NO. DE-EE0005344; W(A) 2011-072 GE has requested a waiver of domestic and foreign patent rights of the United States of America in all subject inventions arising from its participation under the above referenced cooperative agreement entitled "Module Embedded Microinverter Smart Grid Ready Residential Solar Electric System." The cooperative agreement was made under the Solar Energy Grid Integration Systems - Advanced Concepts (SEGIS-AC) Funding Opportunity Announcement (DE-FOA-0000479). The objectives of SEGIS-AC are to support the development and demonstration of technologies in power electronics that reduce the overall PV system costs, allow high penetrations of solar

190

STATEMENT OF CONSIDERATIONS REQUEST BY THE GE CORPORATE RESEARCH AND DEVELOPMENT  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

0 0 STATEMENT OF CONSIDERATIONS REQUEST BY THE GE CORPORATE RESEARCH AND DEVELOPMENT (GE) FOR AN ADVANCE WAIVER OF DOMESTIC AND FOREIGN PATENT RIGHTS UNDER DOE COOPERATIVE AGREEMENT NO. DE- FC07-011D14093; W(A)-01-031; CH-1078 The Petitioner, GE, has requested a waiver of domestic and foreign patent rights for all subject inventions arising from its participation under the above referenced cooperative agreement entitled "Microanalysis Techniques for Accelerated Characterization of Polymer Properties." This waiver will not impact the rights of those parties subject to Public Law 96-517, as amended, nor shall it grant any rights in inventions made by employees of the National Laboratories. The objective of the cooperative agreement is to develop techniques and

191

Microsoft Word - DOE-ID-13-005 GE Hitachi EC B3-6.doc  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

5 5 SECTION A. Project Title: Next Generation Electromagnetic Pump: Analysis Tools and Insulation Materials Development - GE Hitachi Nuclear Energy Americas LLC SECTION B. Project Description GE Hitachi, teaming with Argonne National Laboratory, proposes to improve electromagnetic (EM) pump analysis model and EM design and analysis tools for next-generation EM pumps. Additionally, GE Hitachi proposes to develop, produce, and evaluate samples of new pump insulation materials. SECTION C. Environmental Aspects / Potential Sources of Impact Chemical Use/Storage - Mica flake, ceramic fibers, glass fibers, and ceramic binders will be used. Chemical Waste Disposal - Approximately 1 lb of mica flake, 1 lb of ceramic fibers, 1 lb of glass fibers, and 20 lbs of ceramic binders

192

Suzanne G.E. te Velthuis - Argonne National Laboratories, Materials Sicence  

NLE Websites -- All DOE Office Websites (Extended Search)

NXRS > Suzanne G.E. te Velthuis NXRS > Suzanne G.E. te Velthuis Suzanne G.E. te Velthuis Physicist Bldg. 223, B-205 Phone 630-252-1075 This e-mail address is being protected from spambots. You need JavaScript enabled to view it. Quick Links Selected Publications Selected Invited Talks Present Position Physicist, Materials Science Division, Argonne National Laboratory (2005-Present). Education Ph.D. Degree, Deft University of Technology, The Netherlands (1999). Masters Degree in Applied Physics, Eindhoven University of Technology, The Netherlands (1993). Professional Expirence Assistant Scientist, Materials Science Division, Argonne National Laboratory, (2001-2005). Post-doctoral Scientist, Intense Pulsed Neutron Source, Argonne National Laboratory (1999-2001). Researcher in training (leading to PhD degree), Delft University of Technology, The Netherlands (1994 -1998).

193

Microsoft Word - DOE-ID-13-005 GE Hitachi EC B3-6.doc  

NLE Websites -- All DOE Office Websites (Extended Search)

5 5 SECTION A. Project Title: Next Generation Electromagnetic Pump: Analysis Tools and Insulation Materials Development - GE Hitachi Nuclear Energy Americas LLC SECTION B. Project Description GE Hitachi, teaming with Argonne National Laboratory, proposes to improve electromagnetic (EM) pump analysis model and EM design and analysis tools for next-generation EM pumps. Additionally, GE Hitachi proposes to develop, produce, and evaluate samples of new pump insulation materials. SECTION C. Environmental Aspects / Potential Sources of Impact Chemical Use/Storage - Mica flake, ceramic fibers, glass fibers, and ceramic binders will be used. Chemical Waste Disposal - Approximately 1 lb of mica flake, 1 lb of ceramic fibers, 1 lb of glass fibers, and 20 lbs of ceramic binders

194

Hybrid model of GeV-TeV gamma ray emission from Galactic Center  

E-Print Network (OSTI)

The observations of high energy $\\gamma$-ray emission from the Galactic center (GC) by HESS, and recently by Fermi, suggest the cosmic ray acceleration in the GC and possibly around the supermassive black hole. In this work we propose a lepton-hadron hybrid model to explain simultaneously the GeV-TeV $\\gamma$-ray emission. Both electrons and hadronic cosmic rays were accelerated during the past activity of the GC. Then these particles would diffuse outwards and interact with the interstellar gas and background radiation field. The collisions between hadronic cosmic rays with gas is responsible to the TeV $\\gamma$-ray emission detected by HESS. With fast cooling in the strong radiation field, the electrons would cool down and radiate GeV photons through inverse Compton scattering off the soft background photons. This scenario provides a natural explanation of the observed GeV-TeV spectral shape of $\\gamma$-rays.

Yi-Qing Guo; Qiang Yuan; Cheng Liu; Ai-Feng Li

2013-03-26T23:59:59.000Z

195

Options for an 11 GeV RF Beam Separator for the Jefferson Lab CEBAF Upgrade  

Science Conference Proceedings (OSTI)

The CEBAF accelerator at Jefferson Lab has had, since first demonstration in 1996, the ability to deliver a 5-pass electron beam to experimental halls (A, B, and C) simultaneously. This capability was provided by a set of three, room temperature 499 MHz rf separators in the 5th pass beamline. The separator was two-rod, TEM mode type resonator, which has a high shunt impedance. The maximum rf power to deflect the 6 GeV beams was about 3.4kW. The 12 GeV baseline design does not preserve the capability of separating the 5th pass, 11 GeV beam for the 3 existing halls. Several options for restoring this capability, including extension of the present room temperature system or a new superconducting design in combination with magnetic systems, are under investigation and are presented.

Jean Delayen, Michael Spata, Haipeng Wang

2009-05-01T23:59:59.000Z

196

MaGe - a Geant4-based Monte Carlo framework for low-background experiments  

E-Print Network (OSTI)

A Monte Carlo framework, MaGe, has been developed based on the Geant4 simulation toolkit. Its purpose is to simulate physics processes in low-energy and low-background radiation detectors, specifically for the Majorana and Gerda $^{76}$Ge neutrinoless double-beta decay experiments. This jointly-developed tool is also used to verify the simulation of physics processes relevant to other low-background experiments in Geant4. The MaGe framework contains simulations of prototype experiments and test stands, and is easily extended to incorporate new geometries and configurations while still using the same verified physics processes, tunings, and code framework. This reduces duplication of efforts and improves the robustness of and confidence in the simulation output.

Yuen-Dat Chan; Jason A. Detwiler; Reyco Henning; Victor M. Gehman; Rob A. Johnson; David V. Jordan; Kareem Kazkaz; Markus Knapp; Kevin Kroninger; Daniel Lenz; Jing Liu; Xiang Liu; Michael G. Marino; Akbar Mokhtarani; Luciano Pandola; Alexis G. Schubert; Claudia Tomei

2008-02-06T23:59:59.000Z

197

New Measurement of the Cosmic-Ray Positron Fraction from 5 to 15 GeV  

E-Print Network (OSTI)

We present a new measurement of the cosmic-ray positron fraction at energies between 5 and 15 GeV with the balloon-borne HEAT-pbar instrument in the spring of 2000. The data presented here are compatible with our previous measurements, obtained with a different instrument. The combined data from the three HEAT flights indicate a small positron flux of non-standard origin above 5 GeV. We compare the new measurement with earlier data obtained with the HEAT-e+- instrument, during the opposite epoch of the solar cycle, and conclude that our measurements do not support predictions of charge sign dependent solar modulation of the positron abundance at 5 GeV.

J. J. Beatty; A. Bhattacharyya; C. Bower; S. Coutu; M. A. DuVernois; S. McKee; S. A. Minnick; D. Muller; J. Musser; S. Nutter; A. W. Labrador; M. Schubnell; S. Swordy; G. Tarle; A. Tomasch

2004-12-09T23:59:59.000Z

198

5-10 GeV Neutrinos from Gamma-Ray Burst Fireballs  

E-Print Network (OSTI)

A gamma-ray burst fireball is likely to contain an admixture of neutrons, in addition to protons, in essentially all progenitor scenarios. Inelastic collisions between differentially streaming protons and neutrons in the fireball produce muon neutrinos (antineutrinos) of ~ 10 GeV as well as electron neutrinos (antineutrinos) of ~ 5 GeV, which could produce ~ 7 events/year in kilometer cube detectors, if the neutron abundance is comparable to that of protons. Photons of ~ 10 GeV from pi-zero decay and ~ 100 MeV electron antineutrinos from neutron decay are also produced, but will be difficult to detect. Photons with energies < 1 MeV from shocks following neutron decay produce a characteristic signal which may be distinguishable from the proton-related MeV photons.

John N. Bahcall; Peter Meszaros

2000-04-04T23:59:59.000Z

199

Mechanism of the Initial Oxidation of Hydrogen andHalogen Terminated Ge(111) Surfaces in Air  

DOE Green Energy (OSTI)

The initial stage of the oxidation of Ge(111) surfaces etched by HF, HCl and HBr solutions is systematically studied using synchrotron radiation photoelectron spectroscopy (SR-PES). We perform controlled experiments to differentiate the effects of different oxidation factors. SR-PES results show that both moisture and oxygen contribute to the oxidation of the surfaces; however, they play different roles in the oxidation process. Moisture effectively replaces the hydrogen and halogen termination layers with hydroxyl (OH), but hardly oxidizes the surfaces further. On the other hand, dry oxygen does not replace the termination layers, but breaks the Ge-Ge back bonds and oxidizes the substrates with the aid of moisture. In addition, room light enhances the oxidation rate significantly.

Sun, Shiyu; /Stanford U., Phys. Dept.; Sun, Yun; Liu, Zhi; Lee, Dong-Ick; Pianetta, Piero; /SLAC, SSRL

2006-08-23T23:59:59.000Z

200

Crystallization Times of Ge-Te Phase Change Materials as a Function of Composition  

Science Conference Proceedings (OSTI)

The crystallization times of Ge-Te phase change materials with variable Ge concentrations (29.5-72.4 at. %) were studied. A very strong dependence of the crystallization time on the composition for as-deposited, amorphous films was confirmed, with a minimum for the stoichiometric composition GeTe. The dependence is weaker for melt-quenched, amorphous material and crystallization times are between one to almost four orders of magnitude shorter than for as-deposited materials. This is promising for applications because recrystallization from the melt-quenched phase is the relevant process for optical and solid state memory, and fast crystallization and weak dependence on compositional variations are desirable.

S Raoux; H Cheng; M Caldwell; H Wong

2011-12-31T23:59:59.000Z

Note: This page contains sample records for the topic "ge appliances ge" from the National Library of EnergyBeta (NLEBeta).
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201

Method for preparing high transition temperature Nb/sub 3/Ge superconductors. [Patent application  

DOE Patents (OSTI)

Bulk coatings of Nb/sub 3/Ge superconductors having transition temperatures in excess of 20/sup 0/K are readily formed by a chemical vapor deposition technique involving the coreduction of NbCl/sub 5/ and GeCl/sub 4/ in the presence of hydrogen. The NbCl/sub 5/ vapor may advantageously be formed quantitatively in the temperature range of about 250 to 260/sup 0/C by the chlorination of Nb metal provided the partial pressure of the product NbCl/sub 5/ vapor is maintained at or below about 0.1 atm.

Newkirk, L.R.; Valencia, F.A.

1975-06-26T23:59:59.000Z

202

PHENIX Direct Photons in 200 GeV p+p and Au+Au Collisions  

E-Print Network (OSTI)

We present the first positive direct photon results in Au+Au at sqrt{s_NN} = 200 GeV along with initial p+p results at the same energy. The p+p result is found to be consistent with NLO perturbative QCD predictions within its large uncertainties. In central Au+Au collisions, an excess over expected background as large as 200-300% is observed from p_T = 4-12 GeV/c. This large signal is shown to be consistent with the scaled pQCD photon prediction, together with suppression of meson background sources.

Justin Frantz

2004-04-03T23:59:59.000Z

203

Method for preparing high transition temperature Nb.sub.3 Ge superconductors  

DOE Patents (OSTI)

Bulk coatings of Nb.sub.3 Ge superconductors having transition temperatures in excess of 20 K are readily formed by a chemical vapor deposition technique involving the coreduction of NbCl.sub.5 and GeCl.sub.4 in the presence of hydrogen. The NbCl.sub.5 vapor may advantageously be formed quantitatively in the temperature range of about 250.degree. to 260.degree. C by the chlorination of Nb metal provided the partial pressure of the product NbCl.sub.5 vapor is maintained at or below about 0.1 atm.

Newkirk, Lawrence R. (Los Alamos, NM); Valencia, Flavio A. (Santa Fe, NM)

1977-01-01T23:59:59.000Z

204

Blue Emission Peak of GeO{sub 2} Particles Grown Using Thermal Evaporation  

Science Conference Proceedings (OSTI)

In this paper we report a simple thermal evaporation technique (horizontal tube furnace) to grow large quantities of GeO{sub 2} particles with diameters ranging from tens of nanometer to 500 nm on n-type (100) Si substrate free of catalyst. The particles were grown at temperature about 1000 degree sign C for 2 hrs and characterized by scanning electron microscopy (SEM), X-Ray diffraction (XRD), energy-dispersive X-ray spectroscopy (EDX) and photoluminescence (PL) spectroscopy. The photoluminescence spectrum reveals several emission peaks around 400 nm at room temperature. Raman measurement also measured at room temperature for this GeO{sub 2} particles.

Sulieman, Kamal Mahir [School of Physics, Universiti Sains Malaysia (USM), 11800 Minden, Penang (Malaysia); Physics Department, Alzaiem Alazhary University, 1432-Khartoum (Sudan); Jumidali, M. M. [School of Physics, Universiti Sains Malaysia (USM), 11800 Minden, Penang (Malaysia); Faculty of Applied Science, Universiti Teknologi MARA, 13500 Penang (Malaysia); Hashim, M. R. [School of Physics, Universiti Sains Malaysia (USM), 11800 Minden, Penang (Malaysia)

2010-07-07T23:59:59.000Z

205

Process for preparing high-transition-temperature superconductors in the Nb-Al-Ge system  

DOE Patents (OSTI)

The patent describes a process for preparing superconducting materials in the Nb-Al-Ge system having transition temperatures in excess of 19K. The process comprises premixing powdered constituents, pressing them into a plug, heating the plug to 1,450-1,800C for 30 minutes to an hour under vacuum or an inert atmosphere, and annealing at moderate temperatures for reasonably long times (approximately 50 hours). High transition-temperature superconductors, including those in the Nb3(Al,Ge) system, prepared in accordance with this process exhibit little degradation in the superconducting transition temperature on being ground to -200 mesh powder. (GRA)

Giorgi, A.L.; Szklarz, E.G.

1973-01-30T23:59:59.000Z

206

Precise measurement of the {sup 64}Ge mass and its effect on the rp process  

SciTech Connect

The Canadian Penning Trap mass spectrometer has been used to determine the mass excesses of {sup 64}Ge and {sup 64}Ga as -54344(30) keV and -58832.5(39) keV, respectively. Under typical conditions used for modeling x-ray bursts, {sup 64}Ge is confirmed as a waiting-point nuclide and can contribute up to 35.5 s to the timescale of the rp process at a peak x-ray burst temperature of 1.5 GK.

Clark, J. A. [Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520 (United States); Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2 (Canada); Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States); Sharma, K. S. [Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2 (Canada); Savard, G. [Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States); Department of Physics, University of Chicago, Chicago, Illinois 60637 (United States); Levand, A. F.; Zhou, Z.; Seweryniak, D.; Trimble, W. [Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States); Wang, J. C. [Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2 (Canada); Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States); Blank, B. [Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States); Centre d'Etudes Nucleaires de Bordeaux-Gradignan, F-33175 Gradignan Cedex (France); Buchinger, F.; Crawford, J. E.; Gulick, S.; Lee, J. K. P. [Department of Physics, McGill University, Montreal, Quebec H3A 2T8 (Canada)

2007-03-15T23:59:59.000Z

207

Implications of 98 GeV and 125 GeV Higgs scenario in non-decoupling SUSY with updated ATLAS, CMS and PLANCK data  

E-Print Network (OSTI)

We discuss both MSSM and NMSSM scenarios in which the lightest Higgs boson with $m_h=98$~GeV is consistent with the small excess ($\\sim 2.3 \\sigma$) observed at the LEP in $e^+ e^-\\rightarrow Zh$, with $h \\rightarrow b {\\bar b}$ process and the heavier Higgs boson of mass close to 125~GeV as the observed candidate of the SM Higgs like particle at the LHC. We show the allowed regions in the non-decoupling Higgs zone of MSSM parameter space which are consistent with several low energy constraints coming from heavy flavour physics, latest experimental data on Higgs signals and lower limit on superparticle masses from 7~TeV and 8~TeV LHC run. We also implement the constraints from the relic density of the cold dark matter as obtained from the recent PLANCK data. Additionally, we discuss the possibility of observing the light Higgs boson of mass 98~GeV at the 14~TeV LHC run via $pp \\rightarrow V h$, with $h \\rightarrow b \\bar b$ using the technique of jet substructure. Our analysis shows that at 14~TeV LHC run wit...

Bhattacherjee, Biplob; Chakraborty, Amit; Chattopadhyay, Utpal; Das, Debottam; Ghosh, Dilip Kumar

2013-01-01T23:59:59.000Z

208

The novel use of low temperature hydrogenated microcrystalline silicon germanium (cSiGe: H) for MEMS applications  

Science Conference Proceedings (OSTI)

In this paper, we propose hydrogenated microcrystalline silicon germanium (@mcSiGe:H) as a MEMS structural material deposited at temperatures of 300-400 ^oC, showing good mechanical and electrical properties. This range of deposition temperatures is ... Keywords: Growth mechanism, Low temperature processing, Microcrystalline, Microelectromechanical systems, PECVD, SiGe, Stress

M. Gromova; K. Baert; C. Van Hoof; A. Mehta; A. Witvrouw

2004-10-01T23:59:59.000Z

209

Neutral pion production in Au plus Au collisions at root s(NN)=200 GeV  

E-Print Network (OSTI)

The results of midrapidity (0GeV/c) in ?(s[subscript NN])=200?GeV?Au+Au collisions, measured by the STAR experiment, are presented. ...

Walker, M.

210

Direct photons in 200 GeV p+p, d+Au, and Au+Au from PHENIX  

E-Print Network (OSTI)

Direct photons were measured with the PHENIX experiment in p+p, d+Au, and Au+Au at sqrt(s_NN) = 200 GeV. To tackle the p_T region below 5 GeV/c, direct photons were measured through their internal conversion into e^+e^- in Au+Au collisions.

Stefan Bathe; for the PHENIX Collaboration

2005-11-22T23:59:59.000Z

211

Room-temperature electroluminescence from germanium in an Al0.3Ga0.7As/Ge heterojunction  

E-Print Network (OSTI)

.7As/Ge heterojunction light-emitting diode without any complicated manipulation for alternating. ©2012 Optical Society of America OCIS codes: (230.3670) Light-emitting diodes; (230.3990) Micro. Vuckovi, and Y. Nishi, "Room temperature 1.6 microm electroluminescence from Ge light emitting diode on Si

Kolner, Brian H.

212

The Influence of Strain Relaxation on the Electrical Properties of Submicron Si/SiGe Resonant-Tunneling Diodes  

Science Conference Proceedings (OSTI)

Resonant tunneling devices (RTDs) and resonant tunneling transistors (RTTs) are possible building blocks with increased functionality of future microelectronic circuits. These quantum devices can be made in the Si/SiGe system, which is compatible with ... Keywords: SiGe, resonant tunneling, strain relaxation

P. W. Lukey; J. Caro; T. Zijlstra; E. van der Drift; S. Radelaar

2000-06-01T23:59:59.000Z

213

Adhesion effect of interface layers on pattern fabrication with GeSbTe as laser thermal lithography film  

Science Conference Proceedings (OSTI)

Adhesion of pattern structures is a very important issue in laser thermal lithography. In this paper, Si"3N"4 and ZnS-SiO"2 were investigated as interface layers to improve patterns' adhesion to substrate on pattern fabrication with Ge"2Sb"2Te"5 as laser ... Keywords: Adhesion, GeSbTe, Interface layers, Thermal lithography, Thin films, Wet etching

Changmeng Deng; Yongyou Geng; Yiqun Wu; Yang Wang; Jinsong Wei

2013-03-01T23:59:59.000Z

214

Optical Modulator on Si Employing Ge Quantum Wells Jonathan E. Roth1*  

E-Print Network (OSTI)

Optical Modulator on Si Employing Ge Quantum Wells Jonathan E. Roth1* , Onur Fidaner1 , Rebecca K ; (230.5590) Quantum-well devices The recently demonstrated quantum confined Stark effect (QCSE) in germanium quantum wells is a likely candidate for creating optoelectronic modulators for monolithically

Miller, David A. B.

215

Search for charm in 250 GeV/c $pi$$sup -$p interactions  

SciTech Connect

A study was made of the reaction $pi$$sup -$ + p at 250 GeV/c in order to search for charmed particles. Cross sections, effective mass distributions, and an upper limit for each decay mode were found. However, no evidence was found for charmed particles. (JFP)

Bogert, D.; Hanft, R.; Albright, J.R.

1975-10-01T23:59:59.000Z

216

Search for charm in 250 GeV/c $pi$$sup -$p interactions  

SciTech Connect

Inclusive cross sections are found for strange particle production in $pi$$sup -$p interactions at 250 GeV/c in a search for charmed particles using neutral particle decays in a bubble chamber. The results are preliminary, but at the present statistical level no evidence was found for charmed particle production. (JFP)

Harris, R.; Bogert, D.; Hanft, R.

1975-01-01T23:59:59.000Z

217

Measurements of total cross sections between 23 and 280 GeV/c  

SciTech Connect

The high precision measurements of the total cross sections for $pi$/sup +-/, K/sup +-/, p, and anti p scattering from H$sub 2$ and D$sub 2$ were continued with an extension of the energy range from 23 to 280 GeV/c. (JFP)

Koehler, P.F.M.

1975-01-01T23:59:59.000Z

218

Energy deposition of 24 GeV/c protons in gravity affected  

E-Print Network (OSTI)

Energy deposition of 24 GeV/c protons in gravity affected mercury jet Sergei Striganov Fermilab +- 15 degree 75 +- 15 degree #12;Energy deposition density in round gravity affected jet at 5 Tesla, r=8.1 degree 84.2 +- 5.8 degree 330.9 +- 29.1 degree #12;Energy deposition density in elliptic gravity affected

McDonald, Kirk

219

? cross section in p+p collisions at ?s=200??GeV  

E-Print Network (OSTI)

We report on a measurement of the ?(1S+2S+3S)?e+e- cross section at midrapidity in p+p collisions at ?s=200??GeV. We find the cross section to be 11438(stat+fit)-24+23(syst)??pb. Perturbative QCD calculations at next-to-leading ...

Balewski, Jan T.

220

The GERDA experiment for the search of 0??? decay in ^{76}Ge  

E-Print Network (OSTI)

The GERDA collaboration is performing a search for neutrinoless double beta decay of ^{76}Ge with the eponymous detector. The experiment has been installed and commissioned at the Laboratori Nazionali del Gran Sasso and has started operation in November 2011. The design, construction and first operational results are described, along with detailed information from the R&D phase.

GERDA Collaboration; K. -H. Ackermann; M. Agostini; M. Allardt; M. Altmann; E. Andreotti; A. M. Bakalyarov; M. Balata; I. Barabanov; M. Barnabe Heider; N. Barros; L. Baudis; C. Bauer; N. Becerici-Schmidt; E. Bellotti; S. Belogurov; S. T. Belyaev; G. Benato; A. Bettini; L. Bezrukov; T. Bode; V. Brudanin; R. Brugnera; D. Budjas; A. Caldwell; C. Cattadori; A. Chernogorov; O. Chkvorets; F. Cossavella; A. D`Andragora; E. V. Demidova; A. Denisov; A. di Vacri; A. Domula; V. Egorov; R. Falkenstein; A. Ferella; K. Freund; F. Froborg; N. Frodyma; A. Gangapshev; A. Garfagnini; J. Gasparro; S. Gazzana; R. Gonzalez de Orduna; P. Grabmayr; V. Gurentsov; K. Gusev; K. K. Guthikonda; W. Hampel; A. Hegai; M. Heisel; S. Hemmer; G. Heusser; W. Hofmann; M. Hult; L. V. Inzhechik; L. Ioannucci; J. Janicsko Csalty; J. Jochum; M. Junker; R. Kankanyan; S. Kianovsky; T. Kihm; J. Kiko; I. V. Kirpichnikov; A. Kirsch; A. Klimenko; M. Knapp; K. T. Knpfle; O. Kochetov; V. N. Kornoukhov; K. Krninger; V. Kusminov; M. Laubenstein; A. Lazzaro; V. I. Lebedev; B. Lehnert; D. Lenz; H. Liao; M. Lindner; I. Lippi; J. Liu; X. Liu; A. Lubashevskiy; B. Lubsandorzhiev; A. A. Machado; B. Majorovits; W. Maneschg; G. Marissens; S. Mayer; G. Meierhofer; I. Nemchenok; L. Niedermeier; S. Nisi; J. Oehm; C. O'Shaughnessy; L. Pandola; P. Peiffer; K. Pelczar; A. Pullia; S. Riboldi; F. Ritter; C. Rossi Alvarez; C. Sada; M. Salathe; C. Schmitt; S. Schnert; J. Schreiner; J. Schubert; O. Schulz; U. Schwan; B. Schwingenheuer; H. Seitz; E. Shevchik; M. Shirchenko; H. Simgen; A. Smolnikov; L. Stanco; F. Stelzer; H. Strecker; M. Tarka; U. Trunk; C. A. Ur; A. A. Vasenko; S. Vogt; O. Volynets; K. von Sturm; V. Wagner; M. Walter; A. Wegmann; M. Wojcik; E. Yanovich; P. Zavarise; I. Zhitnikov; S. V. Zhukov; D. Zinatulina; K. Zuber; G. Zuzel

2012-12-17T23:59:59.000Z

Note: This page contains sample records for the topic "ge appliances ge" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


221

A search for GeV-TeV emission from GRBs with the Milagro detector  

E-Print Network (OSTI)

in the three years since the launch of Swift. Keywords: gamma-ray sources; gamma-ray bursts; astronomical observations gamma-ray PACS: 98.70.Rz,95.85.Pw Gamma-ray bursts (GRBs) have been detected up to GeV energies. B. Yodh CPIOOO, Gamma-Ray Bursts 2007: Proceedings of the Santa Fe Conference, edited by M. Galassi

California at Santa Cruz, University of

222

Fabrication and Testing Status of CEBAF 12 GeV Upgrade Cavities  

Science Conference Proceedings (OSTI)

The 12 GeV upgrade of the Continuous Electron Beam Accelerator Facility (CEBAF) at Jefferson Laboratory (JLab) is under way. All cavities have been built by industry and are presently undergoing post-processing and final low and high power qualification before cryomodule assembly. The status is reported including fabrication-related experiences, observations and issues throughout production, post-processing and qualification.

Marhauser, F; Davis, G K; Forehand, D; Grenoble, C; Hogan, J; Overton, R B; Reilly, A V; Rimmer, R A

2011-09-01T23:59:59.000Z

223

Performance of First C100 Cryomodules for the CEBAF 12 GeV Upgrade Project  

Science Conference Proceedings (OSTI)

The Thomas Jefferson National Accelerator Facility is currently engaged in the 12 GeV Upgrade Project. The goal of the project is a doubling of the available beam energy of CEBAF from 6 GeV to 12 GeV. This increase in beam energy will be due primarily to the construction and installation of ten "C100" cryomodules in the CEBAF linacs. The C100 cryomodules are designed to deliver an average 108 MV each from a string of eight seven-cell, electropolished superconducting RF cavities operating at an average accelerating gradient of 19.2 MV/m. The new cryomodules fit in the same available linac space as the original CEBAF 20 MV cryomodules. Cryomodule production started in September 2010. Initial acceptance testing started in June 2011. The first two C100 cryomodules were installed and tested from August 2011 through October 2011, and successfully operated during the last period of the CEBAF 6 GeV era, which ended in May 2012. This paper will present the results of acceptance testing and commissioning of the C100 style cryomodules to date.

Drury, Michael A. [JLAB; Burrill, Andrew B. [JLAB, Helmholtz-Zentrum Berlin fur Materialien und Energie GmbH; Davis, G. Kirk [JLAB; Hogan, John P. [JLAB; King, Lawrence [JLAB; Marhauser, Frank [JLAB; Park, HyeKyoung [JLAB; Preble, Joseph [JLAB; Reece, Charles E. [JLAB; Reilly, Anthony V. [JLAB; Rimmer, Robert A. [JLAB; Wang, Haipeng [JLAB; Wiseman, Mark A. [JLAB

2012-09-01T23:59:59.000Z

224

Measurements of the Cosmic-Ray Positron Fraction From 1 to 50 GeV  

E-Print Network (OSTI)

Two measurements of the cosmic-ray positron fraction as a function of energy have been made using the High Energy Antimatter Telescope (HEAT) balloon-borne instrument. The first flight took place from Ft. Sumner, New Mexico in 1994, and yielded results above the geomagnetic cutoff energy of 4.5 GeV. The second flight from Lynn Lake, Manitoba in 1995 permitted measurements over a larger energy interval, from 1 GeV to 50 GeV. In this letter we present results on the positron fraction based on data from the Lynn Lake flight, and compare these with the previously published results from the Ft. Sumner flight. The results confirm that the positron fraction does not increase with energy above ~10 GeV, although a small excess above purely secondary production cannot be ruled out. At low energies the positron fraction is slightly larger than that reported from measurements made in the 1960's. This effect could possibly be a consequence of charge dependence in the level of solar modulation.

HEAT Collaboration; S. W. Barwick; E. Schneider; J. J. Beatty; G. A. de Nolfo; A. Bhattacharyya; C. R. Bower; J. A. Musser; C. J. Chaput; S. Coutu; S. McKee; G. Tarle; A. D. Tomasch; J. Knapp; D. M. Lowder; D. Muller; S. P. Swordy; E. Torbet; S. L. Nutter

1997-03-28T23:59:59.000Z

225

LASER WAKEFIELD ACCELERATION BEYOND 1 GeV USING IONIZATION INDUCED INJECTION*  

Science Conference Proceedings (OSTI)

A series of laser wake field accelerator experiments leading to electron energy exceeding 1 GeV are described. Theoretical concepts and experimental methods developed while conducting experiments using the 10 TW Ti:Sapphire laser at UCLA were implemented and transferred successfully to the 100 TW Callisto Laser System at the Jupiter Laser Facility at LLNL. To reach electron energies greater than 1 GeV with current laser systems, it is necessary to inject and trap electrons into the wake and to guide the laser for more than 1 cm of plasma. Using the 10 TW laser, the physics of self-guiding and the limitations in regards to pump depletion over cm-scale plasmas were demonstrated. Furthermore, a novel injection mechanism was explored which allows injection by ionization at conditions necessary for generating electron energies greater than a GeV. The 10 TW results were followed by self-guiding at the 100 TW scale over cm plasma lengths. The energy of the self-injected electrons, at 3 x 10{sup 18} cm{sup -3} plasma density, was limited by dephasing to 720 MeV. Implementation of ionization injection allowed extending the acceleration well beyond a centimeter and 1.4 GeV electrons were measured.

Marsh, K A; Clayton, C E; Joshi, C; Lu, W; Mori, W B; Pak, A; silva, L O; Lemos, N; Fonseca, R A; de Freitas, S; Albert, F; Doeppner, T; Filip, C; Froula, D; Glenzer, S H; Price, D; Ralph, J; Pollock, B B

2011-03-22T23:59:59.000Z

226

Molecular beam epitaxy passivation studies of Ge and III-V semiconductors for advanced CMOS  

Science Conference Proceedings (OSTI)

Future CMOS technologies will require the use of substrate material with a very high mobility in order to fulfil the performance requirements. Therefore, combination of Ge p-MOS with n-MOS devices made out of high mobility III/V compounds, such as GaAs, ... Keywords: High mobility semiconductors, Molecular beam epitaxy (MBE), Passivation

C. Merckling; J. Penaud; D. Kohen; F. Bellenger; A. Alian; G. Brammertz; M. El-Kazzi; M. Houssa; J. Dekoster; M. Caymax; M. Meuris; M. M. Heyns

2009-07-01T23:59:59.000Z

227

Superconductivity for Electric Systems Program Review LANL Contributions to GE HTS Generator  

E-Print Network (OSTI)

-section · Develop a heat generation profile => thermal analysis #12;Superconductivity for Electric Systems Program analysis of the coolant path ­ Investigated affect of rotation on heat load · Completed initial simulationsSuperconductivity for Electric Systems Program Review LANL Contributions to GE HTS Generator

228

SiGe: An attractive material for post-CMOS processing of MEMS  

Science Conference Proceedings (OSTI)

This work gives an overview of the different developments for silicon germanium (Si"1"-"xGe"x) from a MEMS post-processing perspective. First, the maximum processing temperature that does not introduce any damage or degradation into the standard characteristics ... Keywords: Excimer laser annealing, MEMS Post-Processing, Silicon germanium

Sherif Sedky

2007-11-01T23:59:59.000Z

229

CTu2J.1.pdf CLEO Technical Digest OSA 2012 Light Emission in Ge Quantum Wells  

E-Print Network (OSTI)

.3670) Light-emitting diode 1. Introduction The field of Si photonics presents a number of potential benefits. Saraswat, J. Vuckovic, and Y. Nishi, "Room temperature 1.6 µm electroluminescence from Ge light emitting diode on Si substrate" Opt. Express 17, 10019 (2009). [3] P. Chaisakul, D. Marris-Morini, G. Isella, D

Miller, David A. B.

230

Spontaneous Domain Switching during Phase Separation of Pb on Ge(111) and S. Chiang1  

E-Print Network (OSTI)

Spontaneous Domain Switching during Phase Separation of Pb on Ge(111) Y. Sato1,2 and S. Chiang1 1, and S. Chiang, Mater. Sci. Eng. B 96, 215 (2002). [13] Y. Sato and S. Chiang (to be published). [14] See

Chiang, Shirley

231

In adsorption on Si(112) and its impact on Ge growth  

Science Conference Proceedings (OSTI)

The change of the Si(112) surface morphology and structure induced by In adsorption, as well as the impact of In preadsorption on the growth kinetics and island morphology in Ge/Si(112) epitaxy, has been investigated by means of low-energy electron microscopy ...

M. Speckmann; Th. Schmidt; J. I. Flege; J. Falta

2011-07-01T23:59:59.000Z

232

Room temperature 1.6 m electroluminescence from Ge light emitting diode on Si substrate  

E-Print Network (OSTI)

Room temperature 1.6 µm electroluminescence from Ge light emitting diode on Si substrate Szu n+/p light emitting diode on a Si substrate. Unlike normal electrically pumped devices, this device.4670) Optical materials; (230.3670) Light-emitting diodes. References and links 1. L. C. Kimerling, "Silicon

Vuckovic, Jelena

233

Fabrication of improved SiGe alloys for an 18-couple module test  

DOE Green Energy (OSTI)

N- and p-type Si{sub 0.78}Ge{sub 0.22} alloys were fabricated to determine if recently reported improvements in the figure-of-merit, Z, could be realized in devices. These will be tested in an 18-couple module to directly compare the performance of these materials with that of standard coarse-grain SiGe used in flight programs. We describe the synthesis by vacuum casting and hot pressing p-type SiGe and mechanical alloying and hot-isostatic pressing n-type SiGe. Improved materials and standard materials are characterized and compared. The integrated average figures-of-merit (573--1273 K) of the improved materials were Z{sub p} = 0.59 {times} 10{sup {minus}3} K{sup {minus}1} and Z{sub n} = 0.85 {times} 10{sup {minus}3} K{sup {minus}1} compared with Z{sub p} = 0.52 {times} l0{sup {minus}3} K{sup {minus}1} and Z{sub n} = 0.76 {times} 10{sup {minus}3} K{sup {minus}1} for the standard materials. We also report the power factors for improved and standard materials removed from fabricated devices to gain insight as to how subsequent processing impacts performance.

Loughin, S.; Nakahara, J.F.; Centurioni, D.X. [Martin Marietta Astro Space, Philadelphia, PA (United States); Cook, B.A.; Harringa, J.L. [Ames Lab., IA (United States)

1995-01-01T23:59:59.000Z

234

Measurements of the Cosmic-Ray Positron Fraction From 1 to 50 GeV  

E-Print Network (OSTI)

Two measurements of the cosmic-ray positron fraction as a function of energy have been made using the High Energy Antimatter Telescope (HEAT) balloon-borne instrument. The first flight took place from Ft. Sumner, New Mexico in 1994, and yielded results above the geomagnetic cutoff energy of 4.5 GeV. The second flight from Lynn Lake, Manitoba in 1995 permitted measurements over a larger energy interval, from 1 GeV to 50 GeV. In this letter we present results on the positron fraction based on data from the Lynn Lake flight, and compare these with the previously published results from the Ft. Sumner flight. The results confirm that the positron fraction does not increase with energy above ~10 GeV, although a small excess above purely secondary production cannot be ruled out. At low energies the positron fraction is slightly larger than that reported from measurements made in the 1960's. This effect could possibly be a consequence of charge dependence in the level of solar modulation.

Barwick, S W; Beatty, J J; De Nolfo, G A; Bhattacharya, A; Bower, C; Musser, J A; Chaput, C J; Coutu, S; McKee, S; Tarl, G; Tomasch, A D; Knapp, J; Lowder, D M; Mller, D; Swordy, S P; Torbet, E; Nutter, S L

1997-01-01T23:59:59.000Z

235

Barocaloric effect in the magnetocaloric prototype Gd5Si2Ge2  

SciTech Connect

We report on calorimetric measurements under hydrostatic pressure that enabled us to determine the barocaloric effect in Gd5Si2Ge2. The values for the entropy change for moderate pressures compare favourably to those corresponding to the magnetocaloric effect in this compound. Entropy data are complemented with direct measurements of the adiabatic pressure-induced temperature change.

Yuce, Suheyla; Barrio, Maria; Emre, Baris; Stern-Taulats, Enric; Planes, Antoni; Tamarit, Josep-Lluis; Mudryk, Yaroslav; Gschneidner, Karl A.; Pecharsky, Vitalij K.; Manosa, Lluis

2012-08-16T23:59:59.000Z

236

Measurements of Compton Scattering on the Proton at 2 - 6 GeV  

DOE Green Energy (OSTI)

Similar to elastic electron scattering, Compton Scattering on the proton at high momentum transfers(and high p?) can be an effective method to study its short-distance structure. An experiment has been carried out to measure the cross sections for Real Compton Scattering (RCS) on the proton for 2.3-5.7 GeV electron beam energies and a wide distribution of large scattering angles. The 25 kinematic settings sampled a domain of s = 5?11(GeV/c)2,?t = ?7(GeV/c)2 and ?u = 0.5?6.5(GeV/c)2. In addition, a measurement of longitudinal and transverse polarization transfer asymmetries was made at a 3.48 GeV beam energy and a scattering angle of ?cm = 120o. These measurements were performed to test the existing theoretical mechanisms for this process as well as to determine RCS form factors. At the heart of the scientific motivation is the desire to understand the manner in which a nucleon interacts with external excitations at the above listed energies, by comparing and contrasting the two existing models Leading Twist Mechanism and Soft Overlap Handbag Mechanism and identify the dominant mechanism. Furthermore, the Handbag Mechanism allows one to calculate reaction observables in the framework of Generalized Parton Distributions (GPD), which have the function of bridging the wide gap between the exclusive(form factors) and inclusive(parton distribution functions) description of the proton. The experiment was conducted in Hall A of Thomas Jefferson National Accelerator Facility(Jefferson Lab). It used a polarized and unpolarized electron beam, a 6% copper radiator with the thickness of 6.1% radiation lengths (to produce a bremsstrahlung photon beam), the Hall A liquid hydrogen target, a high resolution spectrometer with a focal plane polarimeter, and a photon hodoscope calorimeter. Results of the differential cross sections are presented, and discussed in the general context of the scientific motivation.

Areg Danagoulian

2006-05-01T23:59:59.000Z

237

Contactless monitoring of Ge content and B concentration in ultrathin single and double layer Si{sub 1-x}Ge{sub x} epitaxial films using multiwavelength micro-Raman spectroscopy  

Science Conference Proceedings (OSTI)

Non-contact monitoring of Ge content and B concentration in single and double Si{sub 1-x}Ge{sub x} epitaxial layers on Si(100) device wafers was attempted using high-resolution, multiwavelength micro-Raman spectroscopy. The Ge content and B concentration determined by secondary ion mass spectroscopy (SIMS) depth profiling showed very strong correlation with the position and full-width-at-half-maximum of the Si-Si peak from the Si{sub 1-x}Ge{sub x} epitaxial layers as determined by Raman measurements. High resolution X-ray diffraction (HRXRD) characterization was done for all wafers to determine Ge and B sensitivity and form comparisons with Raman and SIMS analysis. The non-destructive, in-line monitoring of Ge content and B concentration of single and double Si{sub 1-x}Ge{sub x} epitaxial layers with thickness ranging from 5 {approx} 120 nm, on small area monitoring pads, was successfully demonstrated by multiwavelength micro-Raman spectroscopy during epitaxial process optimization, material property verification, and quality control applications.

Chang, Chun-Wei; Hong, Min-Hao; Lee, Wei-Fan; Lee, Kuan-Ching; Jang Jian, Shiu-Ko; Chuang, Yen; Fan, Yu-Ta [Taiwan Semiconductor Manufacturing Company, Ltd., 8, Li-Hsin Rd. 6, Hsinchu Science Park, Hsinchu, 300-77, Taiwan (China); Hasuike, Noriyuki; Harima, Hiroshi [Kyoto Institute of Technology, Matsugasaki, Kyoto, 606-8585 (Japan); Ueda, Takeshi; Ishigaki, Toshikazu; Kang, Kitaek; Sik Yoo, Woo [WaferMasters, Inc., 246 East Gish Road, San Jose, California 95112 (United States)

2012-03-15T23:59:59.000Z

238

High pT [p subscript T] nonphotonic electron production in p+p collisions at ?s=200??[square root of s=200] GeV  

E-Print Network (OSTI)

We present the measurement of nonphotonic electron production at high transverse momentum (pT>2.5??GeV/c) [(p subscript T > 2.5 GeV/c)] in p+p collisions at ?s=200??[square root of s=200] GeV using data recorded during ...

Balewski, Jan T.

239

Experimental limits on massive neutrinos from e/sup +/e/sup /minus// annihilations at 29 GeV  

SciTech Connect

A search was made in 29 GeV e/sup +/e/sup /minus// annihilations for massive neutrinos decaying to e/sup +-/X/sup /minus plus//(..nu..) where X is a muon or meson. A 300 pb/sup /minus/1/ data sample yielded just one candidate event with a mass m/sub ex/ > 1.8 GeV. Significant limits are found for new neutrinos with masses from 1.8 to 6.7 GeV and with mixing parameters in the range 10/sup /minus/6/ < chemically bondUchemically bond/sup 2/ < 1. 12 refs., 4 figs.

Akerlof, C.; Chapman, J.; Errede, D.; Ken, M.T.; Meyer, D.I.; Neal, H.; Nitz, D.; Thun, R.; Tschirhart, R.; Derrick, M.

1989-01-01T23:59:59.000Z

240

u.s. DEPARTIIIENT OF ENERGY EERE PROJECT MA N A GE M E~ T CENT  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

MA N A GE M E~ T CENT MA N A GE M E~ T CENT ER NEPA DETERlIlINATION Page 1 of2 RECIPIENT:Power Environmental Energy Research Institute STATE: CO PROJECT TITLE: Novel Multidimensional Tracers for Geolhermallnter-Well Diagnostics Funding Opportunity Announcement Number DE-PS36-09G099018 Procurement Instrument Number OE·EEOOO3032 NEPA Control Number GFO-1 0-345 CID Number G03032 Based on my review orlhe Information concerning the proposed action, as NEPA Compliance Officer (authoriud under DOE Order 4SI.IA),1 have made the following determination: ex, EA, [IS APPENDIX AND NUMBER: Description: 83.1 Onsile and offsite site characterization and environmental monitoring. including siting, construction (or modification), operation, and dismantlement or closing (abandonment) of characterization and monitoring devices and siting,

Note: This page contains sample records for the topic "ge appliances ge" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


241

STATEMENT OF CONSIDERATIONS PETITION FOR ADVANCE WAIVER OF PATENT RIGHTS BY GE  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

CONTRACT NO. QZ001 UNDER CONTRACT NO. QZ001 UNDER COOPERATIVE AGREEMENT NO. DE-FC07-051D14635 BETWEEN DOMINION NUCLEAR NORTH ANNA LLC ("DOMINION") AND DOE; W(A)-05-025; CH-1291 The Petitioner, GE, has requested a waiver of domestic and certain foreign patent rights for all subject inventions that may be conceived or first actually reduced to practice by GE or its subcontractors, arising from its participation under the above referenced cooperative agreement entitled "North Anna Construction and Operating License Demonstration Project." The objective of the North Anna Construction and Operating License Demonstration Project is to demonstrate the combined Construction and Operating License ("COL") process under 10 CFR 52 to promote new Nuclear Power Plant

242

Categorical Exclusion Determination Form Proposed Action Title: (0675-1534) GE Global Research -  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

34) GE Global Research - 34) GE Global Research - Control Enabling Solutions with Ultrathin Strain and Temperature Sensor System for Reduced Battery Life Cycle Cost Program or Field Office: Advanced Research Projects Agency - Energy LocationCs) CCity/County/State): Niskayuna, NY; Ann Arbor, MI; Dearborn, MI Proposed Action Description: Funding will support efforts to develop a a novel sensor system with supporting multi-physics models to increase battery cell lifetime and extend battery range for electric vehicle applications. Proposed work will consist of: (1) development and fabrication a novel multi-measurand sensor capable of measuring strain and temperature across multiple battery cells; (2) performance of strain and temperature testing and development and validation of multi-physics models; (3)

243

SHIELDING ESTIMATES FOR THE ANL 6.0 GeV SYNCHROTRON LIGHT SOURCE  

NLE Websites -- All DOE Office Websites (Extended Search)

SHIELDING ESTIMATES FOR THE ANL 6.0 GeV SHIELDING ESTIMATES FOR THE ANL 6.0 GeV SYNCHROTRON LIGHT SOURCE H. J. Moe V. R. Veluri LS-55-Revised Harch 1987 2 1.0 Introduction Shielding estimates for the linac, positron converter, booster synchrotron and the positron storage ring have been computed using preliminary design information. Calculations have been made of the resulting radiation for several types of operations involving normal beam loss, as well as, certain accidental beam losses. When available, experimental data from existing accelerator and light source facilities have been used in lieu of theoretical estimates. 2.0 Shielding Design Objective The Department of Energy's basic occupational exposure limit is 5 rem per year (DOE 81). However, in its guidance for maintaining exposures "as

244

REQUEST BY GENERAL ELECTRIC CORPORATE RESEARCH AND DEVELOPMENT (GE) FOR AN ADVANCE WAIVER OF DOMESTIC AND  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

4 4 Statement of Considerations REQUEST BY GENERAL ELECTRIC CORPORATE RESEARCH AND DEVELOPMENT (GE) FOR AN ADVANCE WAIVER OF DOMESTIC AND FOREIGN PATENT RIGHTS TO INVENTIONS MADE UNDER CONTRACT NO. DE-FC26-00NT40993 ENTITLED "VARIABLE SPEED INTEGRATED INTELLIGENT BLOWER FOR HIGH EFFICIENCY HEATING VENTILATION AND AIR CONDITIONING"; W(A)-01-019, CH1066. GE has requested an advance waiver of domestic and foreign patent rights to inventions its employees may conceive or first actually reduce to practice in the performance of Contract No. DE-FC26-00NT40993. As brought out in the attached waiver petition, the scope of work includes the development and marketing of an Electronically Cormutated Motor (ECM) and fan combination. The combination utilizes a common rotating shaft and integral cooling and advanced blower fan

245

Radiation damage induced by GeV electrons in W-Re and Cu targets  

NLE Websites -- All DOE Office Websites (Extended Search)

3 3 UCRL-JC-148049 July 2002 Linear Collider Collaboration Tech Notes Radiation Damage Induced by GeV Electrons in W-Re Targets for Next Generation Linear Colliders M.-J. Caturla 1* , S. Roesler 2 , V. K. Bharadwaj 3 , D. C. Schultz 3 , J. C. Sheppard 3 , J. Marian 1 , B. D. Wirth 1 , W. Stein 1 and A. Sunwoo 1 1 Lawrence Livermore National Laboratory Livermore, CA 2 CERN, CH-1211 Geneva 23, Switzerland 3 Stanford Linear Accelerator Center Menlo Park, California s: We have studied the structural damage of W-Re targets produced by electrons with energies of several GeV and under different conditions of total number of electrons, beam shape and target depth. We report the differences in damage levels for different designs considered in the construction of the next generation of linear accelerators, and discuss the possible effects in the lifetime

246

STATEMENT OF CONSIDERATIONS PETITION FOR ADVANCE WAIVER OF PATENT RIGHTS BY GE  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

SUBCONTRACT NO. QZ002 SUBCONTRACT NO. QZ002 UNDER PRIME CONTRACT NO. DE-FC07-051D14636 BETWEEN NUSTART ENERGY DEVELOPMENT ("NUSTART") AND DOE; W(A)-05- 026; CH-1292 The Petitioner, GE, has requested a waiver of domestic and certain foreign patent rights for all subject inventions that may be conceived or first actually reduced to practice by GE or its subcontractors, arising from its participation under the above referenced cooperative agreement entitled "NuStart Energy Construction and Operating License Demonstration Project." The objective of the cooperative agreement is to demonstrate the combined Construction and Operating License ("COL") process under 10 CFR 52 to promote new Nuclear Power Plant ("NPP") construction in the United States. This work is funded

247

Measurement of inclusive charged current interactions on carbon in a few-GeV neutrino beam  

SciTech Connect

The SciBooNE Collaboration reports a measurement of inclusive charged current interactions of muon neutrinos on carbon with an average energy of 0.8 GeV using the Fermilab Booster Neutrino Beam. We compare our measurement with two neutrino interaction simulations: NEUT and NUANCE. The charged current interaction rates (product of flux and cross section) are extracted by fitting the muon kinematics, with a precision of 6-15% for the energy dependent and 3% for the energy integrated analyses. We also extract CC inclusive interaction cross sections from the observed rates, with a precision of 10-30% for the energy dependent and 8% for the energy integrated analyses. This is the first measurement of the CC inclusive cross section on carbon around 1 GeV. These results can be used to convert previous SciBooNE cross section ratio measurements to absolute cross section values.

Nakajima, Y.; jima, Y.Naka; Alcaraz-Aunion, J.L.; Brice, S.J.; Bugel, L.; Catala-Perez, J.; Cheng, G.; Conrad, J.M.; Djurcic, Z.; Dore, U.; Finley, D.A.; /Kyoto U. /Barcelona, IFAE /Fermilab /MIT /Valencia U. /Columbia U. /MIT /Columbia U. /INFN, Rome /Rome U. /Fermilab /Columbia U. /INFN, Rome /Rome U.

2010-11-01T23:59:59.000Z

248

Coalescing at 8 GeV in the Fermilab Main Injector  

SciTech Connect

For Project X, it is planned to inject a beam of 3 10{sup 11} particles per bunch into the Main Injector. To prepare for this by studying the effects of higher intensity bunches in the Main Injector it is necessary to perform coalescing at 8 GeV. The results of a series of experiments and simulations of 8 GeV coalescing are presented. To increase the coalescing efficiency adiabatic reduction of the 53 MHz RF is required. This results in {approx}70% coalescing efficiency of 5 initial bunches. Data using wall current monitors has been taken to compare previous work and new simulations for 53 MHz RF reduction, bunch rotations and coalescing, good agreement between experiment and simulation was found. By increasing the number of bunches to 7 and compressing the bunch energy spread a scheme generating approximately 3 10{sup 11} particles in a bunch has been achieved. These bunches will then be used in further investigations.

Scott, D.J.; Capista, D.; Chase, B.; Dye, J.; Kourbanis, I.; Seiya, K.; Yang, M.-J.; /Fermilab

2012-05-01T23:59:59.000Z

249

SRF CAVITY PERFORMANCE OVERVIEW FOR THE 12 GeV UPGRADE  

Science Conference Proceedings (OSTI)

The CEBAF accelerator, a recirculating CW electron accelerator that is currently operating at Jefferson Laboratory, is in the process of having 10 new cryomodules installed to allow for the maximum beam energy to be increased from 6 GeV to 12 GeV. This upgrade required the fabrication, processing and RF qualification of 80, seven cell elliptical SRF cavities, a process that was completed in February 2012. The RF performance achieve in the vertical testing dewars has exceeded the design specification by {approx}25% and is a testament to the cavity design and processing cycle that has been implemented. This paper will provide a summary of the cavity RF performance in the vertical tests, as well as review the overall cavity processing cycle and duration for the project.

A. Burrill, G.K. Davis, C.E. Reece, A.V. Reilly, M. Stirbet

2012-07-01T23:59:59.000Z

250

Control of Laser Plasma Based Accelerators up to 1 GeV  

Science Conference Proceedings (OSTI)

This dissertation documents the development of a broadband electron spectrometer (ESM) for GeV class Laser Wakefield Accelerators (LWFA), the production of high quality GeV electron beams (e-beams) for the first time in a LWFA by using a capillary discharge guide (CDG), and a statistical analysis of CDG-LWFAs. An ESM specialized for CDG-LWFAs with an unprecedented wide momentum acceptance, from 0.01 to 1.1 GeV in a single shot, has been developed. Simultaneous measurement of e-beam spectra and output laser properties as well as a large angular acceptance (> {+-} 10 mrad) were realized by employing a slitless scheme. A scintillating screen (LANEX Fast back, LANEX-FB)--camera system allowed faster than 1 Hz operation and evaluation of the spatial properties of e-beams. The design provided sufficient resolution for the whole range of the ESM (below 5% for beams with 2 mrad divergence). The calibration between light yield from LANEX-FB and total charge, and a study on the electron energy dependence (0.071 to 1.23 GeV) of LANEX-FB were performed at the Advanced light source (ALS), Lawrence Berkeley National Laboratory (LBNL). Using this calibration data, the developed ESM provided a charge measurement as well. The production of high quality electron beams up to 1 GeV from a centimeter-scale accelerator was demonstrated. The experiment used a 310 {micro}m diameter gas-filled capillary discharge waveguide that channeled relativistically-intense laser pulses (42 TW, 4.5 x 10{sup 18} W/cm{sup 2}) over 3.3 centimeters of sufficiently low density ({approx_equal} 4.3 x 10{sup 18}/cm{sup 3}) plasma. Also demonstrated was stable self-injection and acceleration at a beam energy of {approx_equal} 0.5 GeV by using a 225 {micro}m diameter capillary. Relativistically-intense laser pulses (12 TW, 1.3 x 10{sup 18}W/cm{sup 2}) were guided over 3.3 centimeters of low density ({approx_equal} 3.5 x 10{sup 18}/cm{sup 3}) plasma in this experiment. A statistical analysis of the CDG-LWFAs performance was carried out. By taking advantage of the high repetition rate experimental system, several thousands of shots were taken in a broad range of the laser and plasma parameters. An analysis program was developed to sort and select the data by specified parameters, and then to evaluate performance statistically. The analysis suggested that the generation of GeV-level beams comes from a highly unstable and regime. By having the plasma density slightly above the threshold density for self injection, (1) the longest dephasing length possible was provided, which led to the generation of high energy e-beams, and (2) the number of electrons injected into the wakefield was kept small, which led to the generation of high quality (low energy spread) e-beams by minimizing the beam loading effect on the wake. The analysis of the stable half-GeV beam regime showed the requirements for stable self injection and acceleration. A small change of discharge delay t{sub dsc}, and input energy E{sub in}, significantly affected performance. The statistical analysis provided information for future optimization, and suggested possible schemes for improvement of the stability and higher quality beam generation. A CDG-LWFA is envisioned as a construction block for the next generation accelerator, enabling significant cost and size reductions.

Nakamura, Kei

2007-12-03T23:59:59.000Z

251

A 125GeV Higgs Boson and Muon g-2 in More Generic Gauge Mediation  

E-Print Network (OSTI)

Recently, the ATLAS and CMS collaborations reported exciting hints of a Standard Model-like Higgs boson with a mass around 125GeV. A Higgs boson this heavy is difficult to realize in conventional models of gauge mediation. Here we revisit the lightest Higgs boson mass in "more generic gauge mediation," where the Higgs doublets mix with the messenger doublets. We show that a Higgs boson mass around 125GeV can be realized in more generic gauge mediation models, even for a relatively light gluino mass ~1TeV. We also show that the muon anomalous magnetic moment can be within 1sigma of the experimental value for these models, even when the Higgs boson is relatively heavy. We also discuss the LHC constraints and the prospects of discovery.

Evans, Jason L; Shirai, Satoshi; Yanagida, Tsutomu T

2012-01-01T23:59:59.000Z

252

Beam Physics for the 12 GeV CEBAF Upgrade Project  

SciTech Connect

Beam physics aspects of the 12 GeV Upgrade of CEBAF are presented. The CEBAF Upgrade to 12 GeV is achieved via 5.5 recirculations through the linacs, and the installation of 10 new high-gradient cryomodules. A new experimental hall, Hall D, is envisioned at the end of North Linac. Simulation results for straight-through and recirculated injectors are summarized and compared. Beam transport designs are discussed and evaluated with respect to matching and beam breakup (BBU) optimization. Effects of synchrotron radiation excitation on the beam properties are calculated. BBU simulations and derived specifications for the damping of higher order modes of the new 7-cell cavities are presented. The energies that provide longitudinal polarization in multiple experimental halls simultaneously are calculated. Finally, a detailed optics design for the Hall D transport line has been obtained.

L. Merminga; J. F. Benesch; S.A. Bogacz; Y.-C. Chao; A. Freyberger; J.M. Grames; L. Harwood; R. Kazimi; G.A. Krafft; M. Spata; M. Tiefenback; M. Wiseman; B.C. Yunn; Y. Zhang

2005-05-16T23:59:59.000Z

253

An overview of the planned Jefferson Lab 12-GeV helium refrigerator upgrade  

SciTech Connect

In February 2006, Jefferson Laboratory in Newport News, VA, received Critical Decision 1 (CD-1) approval to proceed with the engineering and design of the long anticipated upgrade to increase the beam energy of CEBAF, the Continuous Electron Beam Accelerator Facility, from 6 GeV to 12 GeV. This will require the installation of 10 new cryomodules, and additional 2.1-K refrigeration beyond the available 4600 W to handle the increased heat loads. Additionally, a new experimental hall, Hall D, is planned that will require the installation of a small, available refrigerator. This paper will present an overview of the integration of the new proposed refrigeration system into CEBAF, the installation of the available refrigerator for Hall D, and includes planned work scope, current schedule plans and project status.

Arenius, Dana; Creel, Jonathan; Dixon, Kelly; Ganni, Venkatarao; Knudsen, Peter; Sidi-Yekhlef, Ahmed; Wright, Mathew

2008-03-01T23:59:59.000Z

254

MeV-GeV emission from neutron-loaded short gamma-ray burst jets  

E-Print Network (OSTI)

Recent discovery of the afterglow emission from short gamma-ray bursts suggests that binary neutron star or black hole-neutron star binary mergers are the likely progenitors of these short bursts. The accretion of neutron star material and its subsequent ejection by the central engine implies a neutron-rich outflow. We consider here a neutron-rich relativistic jet model of short bursts, and investigate the high energy neutrino and photon emission as neutrons and protons decouple from each other. We find that upcoming neutrino telescopes are unlikley to detect the 50 GeV neutrinos expected in this model. For bursts at z~0.1, we find that GLAST and ground-based Cherenkov telescopes should be able to detect prompt 100 MeV and 100 GeV photon signatures, respectively, which may help test the neutron star merger progenitor identification.

Soebur Razzaque; Peter Meszaros

2006-01-27T23:59:59.000Z

255

Measurement of the g factor of the 4{sub 1}{sup +} state in {sup 70}Ge  

Science Conference Proceedings (OSTI)

The g factors of the 2{sub 1}{sup +},3{sub 1}{sup -}, and 4{sub 1}{sup +} states of {sup 70}Ge have been measured by the transient field technique. The measured value, g(4{sub 1}{sup +})=+0.5(2) is in good agreement with the results of shell-model calculations within the full fp configuration space and with the nuclear g-factor systematics in this region. The measured g(4{sub 1}{sup +}) is consistent with the recently reported positive g(4{sub 1}{sup +}) value for {sup 68}Zn, the N=38 isotone of {sup 70}Ge. The determination of the logarithmic slope of the particle-{gamma} angular correlations is discussed for two typical arrangements of transient field experiments.

Boutachkov, P.; Escuderos, A.; Kumbartzki, G.; Benczer-Koller, N.; Stefanova, E.; Sharon, Y. Y.; Zamick, L. [Department of Physics and Astronomy, Rutgers University, New Brunswick, New Jersey 08903 (United States); Robinson, S. J. Q. [Geology and Physics Department, University of Southern Indiana, Evansville, Indiana 47712 (United States); McCutchan, E. A.; Werner, V.; Ai, H.; Heinz, A.; Qian, J.; Williams, E.; Winkler, R. [Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520 (United States); Garnsworthy, A. B.; Thompson, N. J. [Department of Physics, University of Surrey, Guildford, GU2 7XH (United Kingdom); Guerdal, G. [Department of Physics and Astronomy, Rutgers University, New Brunswick, New Jersey 08903 (United States); Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520 (United States); Clark University, Worcester, Massachusetts 01610 (United States)

2007-11-15T23:59:59.000Z

256

Development of Model-Based Controls for GE's Gasifier and Syngas Cooler  

NLE Websites -- All DOE Office Websites (Extended Search)

Model-Based Controls Model-Based Controls for GE's Gasifier and Syngas Cooler Background The U.S. Department of Energy (DOE) National Energy Technology Laboratory (NETL) develops affordable and clean energy from coal and other fossil fuels to secure a sustainable energy economy. To further this mission, NETL funds research and development of advanced sensor and control technologies that can function under the extreme operating conditions often found in advanced power systems, particularly

257

Compare 100 GeV/n Au Run 2010 with Run 2007  

Science Conference Proceedings (OSTI)

With the very successful commissioning of the vertical stochastic cooling in 100 GeV/n Au Run 2010, the IBS (intra-beam scattering) is no longer the dominant factor in terms of the integrated luminosity. A new luminosity model is needed, where the beam intensity lifetime is more important and the burn-off needs to be accounted for. Toward this goal, a brief review of the Run 2010, compared with Run 2007, is presented.

Zhang, S.Y.

2011-01-01T23:59:59.000Z

258

Some issues on the RF system in the 3 GeV Fermilab pre-booster  

SciTech Connect

Some issues are presented on the rf system in the future Fermilab prebooster, which accelerates 4 bunches each containing 0.25 x 10{sub 14} protons from 1 to 3 GeV kinetic energy. The problem of beam loading is discussed. The proposal of having a non-tunable fixed-frequency rf system is investigated. Robinson's criteria for phase stability are checked and possible Robinson instability growth is computed.

Ng, K. Y.

1998-06-01T23:59:59.000Z

259

SiGe analog AGC circuit for an 802.11a WLAN direct conversion receiver  

Science Conference Proceedings (OSTI)

This brief presents a baseband automatic gain control (AGC) circuit for an IEEE 802.11a wireless local area network (WLAN) direct conversion receiver. The whole receiver is to be fully integrated in a low-cost 0.25-m 75-GHz SiGe bipolar complementary ... Keywords: bipolar complementary metal-oxide-semiconductor (BiCMOS) integrated circuits, feedforward systems, gain control, peak detector, variable gain amplifier (VGA), wireless local-area network (WLAN)

J. P. Alegre; S. Celma; B. Calvo; N. Fiebig; S. Halder

2009-02-01T23:59:59.000Z

260

New phases of D ge 2 current and diffeomorphism algebras in particle physics  

SciTech Connect

We survey some global results and open issues of current algebras and their canonical field theoretical realization in D {ge} 2 dimensional spacetime. We assess the status of the representation theory of their generalized Kac-Moody and diffeomorphism algebras. Particular emphasis is put on higher dimensional analogs of fermi-bose correspondence, complex analyticity and the phase entanglements of anyonic solitons with exotic spin and statistics. 101 refs.

Tze, Chia-Hsiung.

1990-09-01T23:59:59.000Z

Note: This page contains sample records for the topic "ge appliances ge" from the National Library of EnergyBeta (NLEBeta).
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261

Ge(Li) low level in-situ gamma-ray spectrometer applications  

SciTech Connect

Currently a Ge(Li) spectrometer is being employed for in-situ measurements of radionuclides contained in soil. This is being done at nuclear reactor sites and in complex radionuclide fields at the Nevada Test Site. The methodology and precision of the in-situ spectrometric technique was previously established for analysis of radionuclides in soil. Application of the technique to gaseous and liquid effluents containing radionuclides has shown a great deal of promise. (auth)

Phelps, P.L.; Anspaugh, L.R.; Roth, S.J.; Huckabay, G.W.; Sawyer, D.L.

1973-12-27T23:59:59.000Z

262

Nonintrusive Emittance Measurement of 1GeV H- Beam with a Laser  

SciTech Connect

A laser wire based transverse phase space measurement system has been developed at the Spallation Neutron Source (SNS). The system allows a nonintrusive measurement of 1GeV hydrogen ion (H-) beam at the high energy beam transport (HEBT). This paper describes the design, installation, and measurement performance of the system. Major technical challenges in the implementation and commissioning of the nonintrusive phase space diagnostics at high brightness particle accelerator facilities are discussed.

Liu, Yun [ORNL; Aleksandrov, Alexander V [ORNL; Long, Cary D [ORNL; Menshov, Alexander A [ORNL; Pogge, James R [ORNL; Webster, Anthony W [ORNL; Zhukov, Alexander P [ORNL

2012-01-01T23:59:59.000Z

263

High-transition-temperature superconductors in the Nb-Al-Ge system  

DOE Patents (OSTI)

The patent describes superconducting materials of the nominal composition Nb(x)Al(y)Ge(l-y), where x is in the range of 1.9 to 2.8 and y is in the range of 0.5 to 0.9, having transition temperatures in the 19 -20K. range which are readily produced by annealing arc-melted compositions, or cold-pressed, heat-treated compositions at moderate temperatures for reasonably long times (about 50 hours).

Giorgi, A.L.; Szklarz, E.G.

1972-09-26T23:59:59.000Z

264

Consistent dark matter interpretation for CoGeNT and DAMA/LIBRA  

SciTech Connect

In this paper, we study the recent excess of low-energy events observed by the CoGeNT Collaboration and the annual modulation reported by the DAMA/LIBRA Collaboration, and discuss whether these signals could both be the result of the same elastically scattering dark matter particle. We find that, without channeling but when taking into account uncertainties in the relevant quenching factors, a dark matter candidate with a mass of approximately 7 GeV and a cross section with nucleons of {sigma}{sub DM-N{approx}}2x10{sup -4} pb (2x10{sup -40} cm{sup 2}) could account for both of these observations. We also comment on the events recently observed in the oxygen band of the CRESST experiment and point out that these could potentially be explained by such a particle. Lastly, we compare the region of parameter space favored by DAMA/LIBRA and CoGeNT to the constraints from XENON10, XENON100, and CDMS (Si) and find that these experiments cannot at this time rule out a dark matter interpretation of these signals.

Hooper, Dan [Center for Particle Astrophysics, Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States); Department of Astronomy and Astrophysics, University of Chicago, Chicago, Illinois 60637 (United States); Collar, J. I. [Enrico Fermi Institute, KICP and Department of Physics, University of Chicago, Chicago, Illinois 60637 (United States); Hall, Jeter [Center for Particle Astrophysics, Fermi National Accelerator Laboratory, Batavia, Illinois 60510 (United States); McKinsey, Dan [Department of Physics, Yale University, New Haven, Connecticut 06520 (United States); Kelso, Christopher M. [Department of Physics, University of Chicago, Chicago, Illinois 60637 (United States)

2010-12-15T23:59:59.000Z

265

4. pi. physics. [/sup 40/Ar + KCl, 0. 4 to 1. 8 GeV/A  

Science Conference Proceedings (OSTI)

Exclusive ..pi../sup -/ and charged-particle production in collisions of /sup 40/Ar on KCl are studied at incident energies from 0.4 to 1.8 GeV/A. The correlation between the ..pi../sup -/ and the total charged particle multiplicity confines the reaction along a narrow ridge with no exotic islands of pion production. For high multiplicities the system reaches the total disintegration of target and projectile into singly charged fragments and pions. Every 200 MeV/A datum was taken with a central and inelastic trigger. For central collisions the mean ..pi../sup -/ multiplicity increases linearly with the bombarding energy with no marked discontinuities due to the ..delta..(3,3) resonance. At 1.8 GeV/A evidence for nonthermal ..pi../sup -/ production in central collisions is found. The total c.m. energy in ..pi../sup -/ shows linear dependence on the ..pi../sup -/ multiplicity with a slope of epsilon = 300 MeV/..pi../sup -/. Strange particle production in the central collision of 1.8 GeV/A Ar on KCl is seen. 8 figures.

Sandoval, A.

1980-03-01T23:59:59.000Z

266

Photo-oxidation of Ge Nanocrystals: Kinetic Measurements by InSitu Raman Spectroscopy  

SciTech Connect

Ge nanocrystals are formed in silica by ion beam synthesis and are subsequently exposed by selective HF etching of the silica. Under ambient conditions, the exposed nanocrystals are stable after formation of a protective native oxide shell of no more than a few monolayers. However, under visible laser illumination at room temperature and in the presence of O{sub 2}, the nanocrystals rapidly oxidize. The oxidation rate was monitored by measuring the Raman spectra of the Ge nanocrystals in-situ. The intensity ratio of the anti-Stokes to the Stokes line indicated that no significant laser-induced heating of illuminated nanocrystals occurs. Therefore, the oxidation reaction rate enhancement is due to a photo-chemical process. The oxidation rate varies nearly linearly with the logarithm of the laser intensity, and at constant laser intensity the rate increases with increasing photon energy. These kinetic measurements, along with the power dependencies, are described quantitatively by an electron active oxidation mechanism involving tunneling of optically excited electrons through the forming oxide skin and subsequent transport of oxygen ions to the Ge nanocrystal surface.

Sharp, I.D.; Xu, Q.; Yuan, C.W.; Beeman, J.W.; Ager III, J.W.; Chrzan, D.C.; Haller, E.E.

2006-11-22T23:59:59.000Z

267

ON THE ORIGIN OF > 10 GeV PHOTONS IN GAMMA-RAY BURST AFTERGLOWS  

Science Conference Proceedings (OSTI)

Fermi/LAT has detected long-lasting high-energy photons (>100 MeV) from gamma-ray bursts (GRBs), with the highest energy photons reaching about 100 GeV. One proposed scenario is that they are produced by high-energy electrons accelerated in GRB forward shocks via synchrotron radiation. We study the maximum synchrotron photon energy in this scenario, considering the properties of the microturbulence magnetic fields behind the shock, as revealed by recent particle-in-cell simulations and theoretical analyses of relativistic collisionless shocks. Due to the small-scale nature of the microturbulent magnetic field, the Bohm acceleration approximation, in which the scattering mean free path is equal to the particle Larmor radius, breaks down at such high energies. This effect leads to a typical maximum synchrotron photon of a few GeV at 100 s after the burst and this maximum synchrotron photon energy decreases quickly with time. We show that the fast decrease of the maximum synchrotron photon energy leads to a fast decay of the synchrotron flux. The 10-100 GeV photons detected after the prompt phase cannot be produced by the synchrotron mechanism. They could originate from the synchrotron self-Compton emission of the early afterglow if the circumburst density is sufficiently large, or from the external inverse Compton process in the presence of central X-ray emission, such as X-ray flares and prompt high-latitude X-ray emission.

Wang Xiangyu; Liu Ruoyu [School of Astronomy and Space Science, Nanjing University, Nanjing 210093 (China); Lemoine, Martin [Institut d'Astrophysique de paris, CNRS, UPMC, 98 bis boulevard Arago, F-75014 Paris (France)

2013-07-10T23:59:59.000Z

268

Study of plutonium disposition using existing GE advanced Boiling Water Reactors  

SciTech Connect

The end of the cold war and the resulting dismantlement of nuclear weapons has resulted in the need for the US to dispose of 50 to 100 metric tons of excess of plutonium in a safe and proliferation resistant manner. A number of studies, including the recently released National Academy of Sciences (NAS) study, have recommended conversion of plutonium into spent nuclear fuel with its high radiation barrier as the best means of providing permanent conversion and long-term diversion resistance to this material. The NAS study ``Management and Disposition of Excess Weapons Plutonium identified Light Water Reactor spent fuel as the most readily achievable and proven form for the disposition of excess weapons plutonium. The study also stressed the need for a US disposition program which would enhance the prospects for a timely reciprocal program agreement with Russia. This summary provides the key findings of a GE study where plutonium is converted into Mixed Oxide (MOX) fuel and a typical 1155 MWe GE Boiling Water Reactor (BWR) is utilized to convert the plutonium to spent fuel. A companion study of the Advanced BWR has recently been submitted. The MOX core design work that was conducted for the ABWR enabled GE to apply comparable fuel design concepts and consequently achieve full MOX core loading which optimize plutonium throughput for existing BWRs.

Not Available

1994-06-01T23:59:59.000Z

269

Effect of nonstoichiometry on the electrophysical properties of the layered compounds Ge{sub 3}Bi{sub 2}Te{sub 6} and GeBi{sub 2}Te{sub 4}  

Science Conference Proceedings (OSTI)

The objective of this work was to investigate the effect of deviation from stoichiometry on the electrophysical properties (electrical and thermal conductivity, thermoelectric power, and carrier concentration) of the ternary layered semiconducting compounds Ge{sub 3{plus_minus}{delta}1}Bi{sub 2+{delta}2}Te{sub 6+{delta}3} and Ge{sub 1{plus_minus}{delta}3}, which are promising for use in thermoelectric converters.The electrophysical properties were measured at 300 K. The Ge{sub 1-{delta}1}Bi{sub 2+{delta}3} alloys were studied by powder X-ray diffraction analysis on a DRON UM-1 diffractometer (CoK{sub {alpha}} radiation). It was found that Ge{sub 3{plus_minus}{delta}1} Bi{sub 2+{delta}2}Te{sub 6{plus_minus}{delta}3} is a nonstoichiometric phase with p-type conductivity throughout the {delta}{sub 1}, {delta}{sub 2}, and {delta}{sub 3} ranges examined. Our results suggest that cation vacancies are likely to be the dominant nonstoichiometric defects responsible for the high concentration of holes. The conductivity of Ge{sub 1{plus_minus}{delta}1}Bi{sub 2}Te{sub 4} changes from the p-type in the Ge-deficient alloys to the n-type in the Gerich alloys.

Shelimova, L.E.; Karpinskii, O.G.; Avilov, E.S.; Kretova, M.A.; Lubman, C.U. [Baikov Institute of Metallurgy, Moscow (Russian Federation)

1994-12-01T23:59:59.000Z

270

Measurement of J/? Azimuthal Anisotropy in Au+Au Collisions at ?s[subscript NN]=200??GeV  

E-Print Network (OSTI)

The measurement of J/? azimuthal anisotropy is presented as a function of transverse momentum for different centralities in Au+Au collisions at ?s[subscript NN]=200??GeV. The measured J/? elliptic flow is consistent with ...

Balewski, Jan T.

271

Light neutralino dark matter with a very light Higgs for CoGeNT and DAMA/LIBRA data  

E-Print Network (OSTI)

Recently, the CoGeNT collaboration reported the WIMP candidate signal events exceeding the known backgrounds where the light WIMP with large cross section is supported. Motivated by this issue, we analyze a light neutralino dark matter scenario with a very light CP-even Higgs mediation in the elastic scattering process, which provides the mass and direct detection cross section to explain the CoGeNT result. To be compatible with the result of LEP experiments, the light CP-even Higgs is favored to be in 9 to 10 GeV. Such a scenario can be realized in the "Beyond the MSSM" context. The relic abundance consistent with the WMAP result can be obtained when twice of neutralino mass is close to the light Higgs mass via the resonance enhancement of the annihilation cross section. As a result, the neutralino mass is predicted to be at around 5 to 6 GeV.

Kyu Jung Bae; Hyung Do Kim; Seodong Shin

2010-05-27T23:59:59.000Z

272

New Electron Beam-Dump Experiments to Search for MeV to few-GeV Dark Matter  

E-Print Network (OSTI)

In a broad class of consistent models, MeV to few-GeV dark matter interacts with ordinary matter through weakly coupled GeV-scale mediators. We show that a suitable meter-scale (or smaller) detector situated downstream of an electron beam-dump can sensitively probe dark matter interacting via sub-GeV mediators, while B-factory searches cover the 1-5 GeV range. Combined, such experiments explore a well-motivated and otherwise inaccessible region of dark matter parameter space with sensitivity several orders of magnitude beyond existing direct detection constraints. These experiments would also probe invisibly decaying new gauge bosons ("dark photons") down to kinetic mixing of \\epsilon ~ 10^{-4}, including the range of parameters relevant for explaining the (g-2)_{\\mu} discrepancy. Sensitivity to other long-lived dark sector states and to new milli-charge particles would also be improved.

Eder Izaguirre; Gordan Krnjaic; Philip Schuster; Natalia Toro

2013-07-24T23:59:59.000Z

273

SiGe receiver front ends and flip-chip integrated wideband antennas for millimeter-wave passive imaging  

E-Print Network (OSTI)

SiGe wideband 77-GHz and 94-GHz front end receivers with integrated antennas for passive imaging have been designed and characterized. These front end systems exhibit wideband performance with the highest gain and lowest ...

Powell, Johnna, 1980-

2009-01-01T23:59:59.000Z

274

Performance improvement of Ge-Sb-Te material by GaSb doping for phase change memory  

SciTech Connect

Effects of GaSb doping on phase change characteristics of Ge-Sb-Te material are investigated by in situ resistance and x-ray diffraction measurement, optical spectroscopy, and x-ray photoelectron spectroscopy. The crystallization temperature and data retention of Ge-Sb-Te material increase significantly by the addition of GaSb, which results from the high thermal stability of amorphous GaSb. In addition, GaSb-doped Ge-Sb-Te material exhibits faster crystallization speed due to the change in electronic states as a result of the formation of chemical bonds with Ga element. Incorporation of GaSb is highly effective way to enhance the comprehensive performance of Ge-Sb-Te material for phase change memory.

Lu, Yegang [State Key Laboratory of Functional Materials for Informatics, Laboratory of Nanotechnology, Shanghai Institute of Micro-system and Information Technology, Chinese Academy of Sciences, Shanghai 200050 (China) [State Key Laboratory of Functional Materials for Informatics, Laboratory of Nanotechnology, Shanghai Institute of Micro-system and Information Technology, Chinese Academy of Sciences, Shanghai 200050 (China); Faculty of Information Science and Engineering, Ningbo University, Ningbo 315211 (China); Graduate School of Chinese Academy of Sciences, Beijing 100049 (China); Zhang, Zhonghua; Song, Sannian; Cheng, Limin; Song, Zhitang [State Key Laboratory of Functional Materials for Informatics, Laboratory of Nanotechnology, Shanghai Institute of Micro-system and Information Technology, Chinese Academy of Sciences, Shanghai 200050 (China)] [State Key Laboratory of Functional Materials for Informatics, Laboratory of Nanotechnology, Shanghai Institute of Micro-system and Information Technology, Chinese Academy of Sciences, Shanghai 200050 (China); Shen, Xiang; Wang, Guoxiang; Dai, Shixun [Faculty of Information Science and Engineering, Ningbo University, Ningbo 315211 (China)] [Faculty of Information Science and Engineering, Ningbo University, Ningbo 315211 (China)

2013-06-17T23:59:59.000Z

275

Photon and neutral pion production in Au plus Au collisions at root s(NN)=130 GeV  

E-Print Network (OSTI)

We report inclusive photon measurements about midrapidity (ygammagamma decay channel. The fractional contribution of the pi(0)-->gammagamma decay to the inclusive photon spectrum decreases by 20%+/-5% between p(t)=1.65 GeV/c and p(t)=2.4 GeV/c in the most central events, indicating that relative to pi(0)-->gammagamma decay the contribution of other photon sources is substantially increasing.

Adams, J.; Adler, C.; Aggarwal, MM; Ahammed, Z.; Amonett, J.; Anderson, BD; Anderson, M.; Arkhipkin, D.; Averichev, GS; Badyal, SK; Balewski, J.; Barannikova, O.; Barnby, LS; Baudot, J.; Bekele, S.; Belaga, VV; Bellwied, R.; Berger, J.; Bezverkhny, BI; Bhardwaj, S.; Bhaskar, P.; Bhati, AK; Bichsel, H.; Billmeier, A.; Bland, LC; Blyth, CO; Bonner, BE; Botje, M.; Boucham, A.; Brandin, A.; Bravar, A.; Cadman, RV; Cai, XZ; Caines, H.; Sanchez, MCD; Carroll, J.; Castillo, J.; Castro, M.; Cebra, D.; Chaloupka, P.; Chattopadhyay, S.; Chen, HF; Chen, Y.; Chernenko, SP; Cherney, M.; Chikanian, A.; Choi, B.; Christie, W.; Coffin, JP; Cormier, TM; Cramer, JG; Crawford, HJ; Das, D.; Das, S.; Derevschikov, AA; Didenko, L.; Dietel, T.; Dong, X.; Draper, JE; Du, F.; Dubey, AK; Dunin, VB; Dunlop, JC; Majumdar, MRD; Eckardt, V.; Efimov, LG; Emelianov, V.; Engelage, J.; Eppley, G.; Erazmus, B.; Estienne, M.; Fachini, P.; Faine, V.; Faivre, J.; Fatemi, R.; Filimonov, K.; Filip, P.; Finch, E.; Fisyak, Y.; Flierl, D.; Foley, KJ; Fu, J.; Gagliardi, Carl A.; Ganti, MS; Gutierrez, TD; Gagunashvili, N.; Gans, J.; Gaudichet, L.; Germain, M.; Geurts, F.; Ghazikhanian, V.; Ghosh, P.; Gonzalez, JE; Grachov, O.; Grigoriev, V.; Gronstal, S.; Grosnick, D.; Guedon, M.; Guertin, SM; Gupta, A.; Gushin, E.; Hallman, TJ; Hardtke, D.; Harris, JW; Heinz, M.; Henry, TW; Heppelmann, S.; Herston, T.; Hippolyte, B.; Hirsch, A.; Hjort, E.; Hoffmann, GW; Horsley, M.; Huang, HZ; Huang, SL; Humanic, TJ; Igo, G.; Ishihara, A.; Jacobs, P.; Jacobs, WW; Janik, M.; Johnson, I.; Jones, PG; Judd, EG; Kabana, S.; Kaneta, M.; Kaplan, M.; Keane, D.; Kiryluk, J.; Kisiel, A.; Klay, J.; Klein, SR; Klyachko, A.; Koetke, DD; Kollegger, T.; Konstantinov, AS; Kopytine, M.; Kotchenda, L.; Kovalenko, AD; Kramer, M.; Kravtsov, P.; Krueger, K.; Kuhn, C.; Kulikov, AI; Kumar, A.; Kunde, GJ; Kunz, CL; Kutuev, RK; Kuznetsov, AA; Lamont, MAC; Landgraf, JM; Lange, S.; Lansdell, CP; Lasiuk, B.; Laue, F.; Lauret, J.; Lebedev, A.; Lednicky, R.; Leontiev, VM; LeVine, MJ; Li, C.; Li, Q.; Lindenbaum, SJ; Lisa, MA; Liu, F.; Liu, L.; Liu, Z.; Liu, QJ; Ljubicic, T.; Llope, WJ; Long, H.; Longacre, RS; Lopez-Noriega, M.; Love, WA; Ludlam, T.; Lynn, D.; Ma, J.; Ma, YG; Magestro, D.; Mahajan, S.; Mangotra, LK; Mahapatra, DP; Majka, R.; Manweiler, R.; Margetis, S.; Markert, C.; Martin, L.; Marx, J.; Matis, HS; Matulenko, YA; McShane, TS; Meissner, F.; Melnick, Y.; Meschanin, A.; Messer, M.; Miller, ML; Milosevich, Z.; Minaev, NG; Mironov, C.; Mishra, D.; Mitchell, J.; Mohanty, B.; Molnar, L.; Moore, CF; Mora-Corral, MJ; Morozov, V.; de Moura, MM; Munhoz, MG; Nandi, BK; Nayak, SK; Nayak, TK; Nelson, JM; Nevski, P.; Nikitin, VA; Nogach, LV; Norman, B.; Nurushev, SB; Odyniec, G.; Ogawa, A.; Okorokov, V.; Oldenburg, M.; Olson, D.; Paic, G.; Pandey, SU; Pal, SK; Panebratsev, Y.; Panitkin, SY; Pavlinov, AI; Pawlak, T.; Perevoztchikov, V.; Peryt, W.; Petrov, VA; Phatak, SC; Picha, R.; Planinic, M.; Pluta, J.; Porile, N.; Porter, J.; Poskanzer, AM; Potekhin, M.; Potrebenikova, E.; Potukuchi, BVKS; Prindle, D.; Pruneau, C.; Putschke, J.; Rai, G.; Rakness, G.; Raniwala, R.; Raniwala, S.; Ravel, O.; Ray, RL; Razin, SV; Reichhold, D.; Reid, JG; Renault, G.; Retiere, F.; Ridiger, A.; Ritter, HG; Roberts, JB; Rogachevski, OV; Romero, JL; Rose, A.; Roy, C.; Ruan, LJ; Sahoo, R.; Sakrejda, I.; Salur, S.; Sandweiss, J.; Savin, I.; Schambach, J.; Scharenberg, RP; Schmitz, N.; Schroeder, LS; Schweda, K.; Seger, J.; Seliverstov, D.; Seyboth, P.; Shahaliev, E.; Shao, M.; Sharma, M.; Shestermanov, KE; Shimanskii, SS; Singaraju, RN; Simon, F.; Skoro, G.; Smirnov, N.; Snellings, R.; Sood, G.; Sorensen, P.; Sowinski, J.; Spinka, H. M.; Srivastava, B.; Stanislaus, S.; Stock, R.; Stolpovsky, A.; Strikhanov, M.; Stringfellow, B.; Struck, C.; Suaide, AAP; Sugarbaker, E.; Suire, C.; Sumbera, M.; Surrow, B.; Symons, TJM; de Toledo, AS; Szarwas, P.; Tai, A.; Takahashi, J.; Tang, AH; Thein, D.; Thomas, JH; Tikhomirov, V.; Tokarev, M.; Tonjes, MB; Trainor, TA; Trentalange, S.; Tribble, Robert E.; Trivedi, MD; Trofimov, V.; Tsai, O.; Ullrich, T.; Underwood, DG; Van Buren, G.; VanderMolen, AM; Vasiliev, AN; Vasiliev, M.; Vigdor, SE; Viyogi, YP; Voloshin, SA; Waggoner, W.; Wang, F.; Wang, G.; Wang, XL; Wang, ZM; Ward, H.; Watson, JW; Wells, R.; Westfall, GD; Whitten, C.; Wieman, H.; Willson, R.; Wissink, SW; Witt, R.; Wood, J.; Wu, J.; Xu, N.; Xu, Z.; Xu, ZZ; Yakutin, AE; Yamamoto, E.; Yang, J.; Yepes, P.; Yurevich, VI; Zanevski, YV; Zborovsky, I.; Zhang, H.; Zhang, HY; Zhang, WM; Zhang, ZP; Zolnierczuk, PA; Zoulkarneev, R.; Zoulkarneeva, J.; Zubarev, AN.

2004-01-01T23:59:59.000Z

276

Accelerating Into the Future: From 0 to GeV in a Few Centimeters (LBNL Summer Lecture Series)  

SciTech Connect

Summer Lecture Series 2008: By exciting electric fields in plasma-based waveguides, lasers accelerate electrons in a fraction of the distance conventional accelerators require. The Accelerator and Fusion Research Division's LOASIS program, headed by Wim Leemans, has used 40-trillion-watt laser pulses to deliver billion-electron-volt (1 GeV) electron beams within centimeters. Leemans looks ahead to BELLA, 10-GeV accelerating modules that could power a future linear collider.

Leemans, Wim (LOASIS Program, AFRD)

2008-07-08T23:59:59.000Z

277

Synthesis and Characterization of Gd5Si2Ge2-Al Composite for Automobile Applications  

E-Print Network (OSTI)

This thesis research synthesizes a new class of composite materials and investigates their properties, performance, and potential applications. The new materials that are multi-phase and multifunctional are considered for use in car cooling systems, internal combustion engine waste-heat-power generators, and engine crack healing which are major problems plaguing the auto industry. This research uses primarily experimental approaches to study the magnetocaloric compound, Ge5Si2Ge2 (GSG), that has large strain effects. Such a material was formed into a composite using Al as a substrate. The newly developed composite, GSG-Al, is the first material of its kind that possesses self-healing effects in cracks. X-ray diffraction was used to determine the crystal structures that existed within the material. It is found that the sintering process used to create the composite caused the formation of GdAlGe that is a magnetic compound with a high Curie temperature. The GSG-Al has a wide variety of crystal structures, ranging from face centered cubic for aluminum phases to monoclinic and orthorhombic phases for GSG. The discovery of GdAlGe confirmed that alpha-ThSi-type tetragonal and YAlGe-type orthorhombic crystal structures existed. Transmission electron microscopy (TEM) was used to analyze the wear debris collected during tribo-testing. The debris were also analyzed using energy-dispersive X-ray spectroscopy (EDS) for chemical analysis. The GSG-Al was put through tribological studies at several different temperatures to determine the thermal effects on the composite. The GSG-Al, although found to be ductile, showed high resistance to wear when compared to a common aluminum alloy, Al 6061-T651. The wear rate decreased with increasing temperature when the temperature was increased from the room temperature to 150 degrees C. Results showed that with GSG, the composite did not show cracking common in Al alloys. This was due to the unique thermal expansion properties of the GSG-Al. The phase transformation induced a significant volume expansion in the material and thus a giant strain effect. This research opens new approaches in energy conversion and improving efficiency of automobile engines. The composite developed here is important for future scientific investigation in the area of multifunctional materials as well as materials that exhibit self-healing tendencies.

Barkley, Brady C.

2010-05-01T23:59:59.000Z

278

Structural and Magnetothermal Properties of Compounds: Yb5SixGe4-x,Sm5SixGe4-x, EuO, and Eu3O4  

Science Conference Proceedings (OSTI)

The family of R{sub 5}Si{sub x}Ge{sub 4-x} alloys demonstrates a variety of unique physical phenomena related to magneto-structural transitions associated with reversible breaking and reforming of specific bonds that can be controlled by numerous external parameters such as chemical composition, magnetic field, temperature, and pressure. Therefore, R{sub 5}Si{sub x}Ge{sub 4-x} systems have been extensively studied to uncover the mechanism of the extraordinary magneto-responsive properties including the giant magnetoresistance (GMR) and colossal magnetostriction, as well as giant magnetocaloric effect (GMCE). Until now, more than a half of possible R{sub 5}Si{sub x}Ge{sub 4-x} pseudobinary systems have been completely or partially investigated with respect to their crystallography and phase relationships (R = La, Pr, Nd, Gd, Tb, Dy, Er, Lu, Y). Still, there are other R{sub 5}Si{sub x}Ge{sub 4-x} systems (R = Ce, Sm, Ho, Tm, and Yb) that are not studied yet. Here, we report on phase relationships and structural, magnetic, and thermodynamic properties in the Yb{sub 5}Si{sub x}Ge{sub 4-x} and Sm{sub 5}Si{sub x}Ge{sub 4-x} pseudobinary systems, which may exhibit mixed valence states. The crystallography, phase relationships, and physical properties of Yb{sub 5}Si{sub x}Ge{sub 4-x} alloys with 0 {le} x {le} 4 have been examined by using single crystal and powder x-ray diffraction at room temperature, and dc magnetization and heat capacity measurements between 1.8 K and 400 K in magnetic fields ranging from 0 to 7 T. Unlike the majority of R{sub 5}Si{sub x}Ge{sub 4-x} systems studied to date, where R is the rare earth metal, all Yb-based germanide-silicides with the 5:4 stoichiometry crystallize in the same Gd{sub 5}Si{sub 4}-type structure. The magnetic properties of Yb{sub 5}Si{sub x}Ge{sub 4-x} materials are nearly composition-independent, reflecting the persistence of the same crystal structure over the whole range of x from 0 to 4. Both the crystallographic and magnetic property data indicate that Yb{sub 5}Si{sub x}Ge{sub 4-x} alloys are mixed valence systems, in which the majority (60%) of Yb atoms is divalent, while the minority (40%) is trivalent. This finding is supported by recent Moessbauer spectroscopy data.

Kyunghan Ahn

2007-05-09T23:59:59.000Z

279

Eleven new compounds in the RE-Cd-Ge systems (RE=Pr, Nd, Sm, Gd-Yb; Y): Crystal chemistry of the RE{sub 2}CdGe{sub 2} series  

SciTech Connect

A large new family of rare-earth metal-cadmium-germanides RE{sub 2}CdGe{sub 2} (RE=Y, Pr, Nd, Sm, Gd-Yb) has been synthesized and structurally characterized. All eleven structures have been established from single-crystal X-ray diffraction data and have been found to belong to the tetragonal Mo{sub 2}FeB{sub 2} structure type (ordered ternary variant of the U{sub 3}Si{sub 2} structure type-space group P4/mbm (No. 127), Z=2; Pearson symbol tP10). The structural variations among the three series of isostructural RE{sub 2}MgGe{sub 2}, RE{sub 2}InGe{sub 2}, and RE{sub 2}CdGe{sub 2} compounds are discussed, as well as the crystal chemistry changes as a function of the decreasing size of the rare-earth metals (lattice constants a=7.176(2)-7.4589(12) A and c=4.1273(14)-4.4356(13) A). The experimental results have been complemented by tight-binding linear muffin-tin orbital (TB-LMTO) electronic structure calculations. - Graphical abstract: More than 300 compounds have been reported to crystallize with the tetragonal U{sub 3}Si{sub 2} structure type, or the Mo{sub 2}FeB{sub 2} structure type, which is its ordered ternary variant. Among them, there are several large RE{sub 2}CdX{sub 2} classes, where the X-elements are typically late transition metals such as Cu, Ni, Au, Pd, Pt, and Rh. The new RE{sub 2}CdGe{sub 2} phases (RE=Y, Pr, Nd, Sm, Gd-Yb) increase the diversity and represent the first cadmium germanides. Highlights: Black-Right-Pointing-Pointer RE{sub 2}CdGe{sub 2} (RE=Y, Pr, Nd, Sm, Gd-Yb) are new ternary germanides. Black-Right-Pointing-Pointer Their structures can be recognized as a 1:1 intergrowth of CsCl- and AlB{sub 2}-like slabs. Black-Right-Pointing-Pointer The Ge atoms are covalently bound into Ge{sub 2} dumbbells. Black-Right-Pointing-Pointer Almost all RE{sub 2}CdGe{sub 2} phases are the first structurally characterized phases in the respective ternary RE-Cd-Ge systems.

Guo Shengping; Meyers, John J.; Tobash, Paul H. [Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716 (United States); Bobev, Svilen, E-mail: bobev@udel.edu [Department of Chemistry and Biochemistry, University of Delaware, Newark, Delaware 19716 (United States)

2012-08-15T23:59:59.000Z

280

GE Energy  

Science Conference Proceedings (OSTI)

... Sub- Committee on Technology and Innovation assessed coordination and progress made on smart grid system architecture and technical ...

2012-12-03T23:59:59.000Z

Note: This page contains sample records for the topic "ge appliances ge" from the National Library of EnergyBeta (NLEBeta).
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281

Adsorption and thermal reactions of disilane and the growth of Si films on Ge(100)-(2[times]1)  

SciTech Connect

Scanning tunneling microscopy (STM), core-level photoemission spectroscopy using synchrotron radiation, and electron diffraction were employed to study the vapor-phase epitaxial growth of Si on Ge(100)-(2[times]1) using disilane (Si[sub 2]H[sub 6]). The dissociative chemisorption of a Si[sub 2]H[sub 6] molecule on Ge(100)-(2[times]1) at room temperature results in two Si-trihydride (SiH[sub 3]) radicals bonded onto two adjacent Ge dangling bonds. Some SiH[sub 2] and GeH species are also formed as a result of decomposition of SiH[sub 3]. An initial sticking coefficient of [similar to]0.5 is deduced from STM images. An exposure of more than 2 langmuirs (1 langmuir=10[sup [minus]6] Torr s) of disilane at room temperature saturates the surface with SiH[sub 3], SiH[sub 2], and GeH species, and the resulting surface is disordered. The total amount of Si on the saturated surface is about 1/2 monolayer (ML). Successive annealing of the saturated surface to higher temperatures causes the conversion of SiH[sub 3] to SiH[sub 2], the conversion of SiH[sub 2] to SiH, and the desorption of H from GeH. These processes become complete at about 600 K, and the resulting surface is a clean Ge(100)-(2[times]1) interspersed with about 1/2 ML of Si-monohydride (SiH)-(2[times]1) islands. Desorption of hydrogen from these SiH islands occurs at even higher annealing temperatures, and is accompanied by indiffusion of Si into the Ge substrate. This process becomes complete at about 690 K, and the final system configuration is a clean Ge(100)-(2[times]1) with about 1/2 ML of Si buried in the subsurface region. Multilayer Si deposition was performed by atomic layer epitaxy, i.e., cyclic disilane adsorption at [similar to]340 K followed by thermal conversion at 820 K. For up to 18 cycles, the resulting surface consists of Ge only. The change in surface morphology is studied by STM.

Lin, D.; Miller, T.; Chiang, T. (Department of Physics, University of Illinois, 1110 West Green Street, Urbana, Illinois 61801 (United States) Materials Research Laboratory, University of Illinois, 104 South Goodwin Avenue, Urbana, Illinois 61801 (United States))

1993-03-15T23:59:59.000Z

282

Study of plutonium disposition using the GE Advanced Boiling Water Reactor (ABWR)  

SciTech Connect

The end of the cold war and the resulting dismantlement of nuclear weapons has resulted in the need for the U.S. to disposition 50 to 100 metric tons of excess of plutonium in parallel with a similar program in Russia. A number of studies, including the recently released National Academy of Sciences (NAS) study, have recommended conversion of plutonium into spent nuclear fuel with its high radiation barrier as the best means of providing long-term diversion resistance to this material. The NAS study {open_quotes}Management and Disposition of Excess Weapons Plutonium{close_quotes} identified light water reactor spent fuel as the most readily achievable and proven form for the disposition of excess weapons plutonium. The study also stressed the need for a U.S. disposition program which would enhance the prospects for a timely reciprocal program agreement with Russia. This summary provides the key findings of a GE study where plutonium is converted into Mixed Oxide (MOX) fuel and a 1350 MWe GE Advanced Boiling Water Reactor (ABWR) is utilized to convert the plutonium to spent fuel. The ABWR represents the integration of over 30 years of experience gained worldwide in the design, construction and operation of BWRs. It incorporates advanced features to enhance reliability and safety, minimize waste and reduce worker exposure. For example, the core is never uncovered nor is any operator action required for 72 hours after any design basis accident. Phase 1 of this study was documented in a GE report dated May 13, 1993. DOE`s Phase 1 evaluations cited the ABWR as a proven technical approach for the disposition of plutonium. This Phase 2 study addresses specific areas which the DOE authorized as appropriate for more in-depth evaluations. A separate report addresses the findings relative to the use of existing BWRs to achieve the same goal.

NONE

1994-04-30T23:59:59.000Z

283

Synthesis, structural characterization and magnetic properties of RE{sub 2}MgGe{sub 2} (RE=rare-earth metal)  

SciTech Connect

A series of rare-earth metal-magnesium-germanides RE{sub 2}MgGe{sub 2} (RE=Y, Nd, Sm, Gd-Tm, Lu) has been synthesized by reactions of the corresponding elements at high temperature. Their structures have been established by single-crystal and powder X-ray diffraction and belong to the Mo{sub 2}FeB{sub 2} structure type (space group P4/mbm (No. 127), Z=2; Pearson symbol tP10). Temperature dependent DC magnetization measurements indicate Curie-Weiss paramagnetism in the high-temperature regime for all members of the family, excluding Y{sub 2}MgGe{sub 2}, Sm{sub 2}MgGe{sub 2}, and Lu{sub 2}MgGe{sub 2}. At cryogenic temperatures (ca. 60 K and below), most RE{sub 2}MgGe{sub 2} phases enter into an antiferromagnetic ground-state, except for Er{sub 2}MgGe{sub 2} and Tm{sub 2}MgGe{sub 2}, which do not undergo magnetic ordering down to 5 K. The structural variations as a function of the decreasing size of the rare-earth metals, following the lanthanide contraction, and the changes in the magnetic properties across the series are discussed as well. - Graphical Abstract: The structure of RE{sub 2}MgGe{sub 2} (RE=Y, Nd, Sm, Gd-Tm, Lu) can be best viewed as 2-dimensional slabs of Mg and Ge atoms (anionic sub-lattice), and layers of rare-earth metal atoms (cationic sub-lattice) between them. Within this description, one should consider the Ge-Ge dumbbells (formally Ge{sup 6-}{sub 2}), interconnected with square-planar Mg atom as forming flat [MgGe{sub 2}] layers (z=0), stacked along the c-axis with the layers at z=1/2, made of rare-earth metal cations (formally RE{sup 3+}). Highlights: > RE{sub 2}MgGe{sub 2} (RE=Y, Nd, Sm, Gd-Tm, Lu) are new ternary germanides. > Their structures can be recognized as a 1:1 intergrowth of CsCl- and AlB{sub 2}-like slabs. > Ge atoms are covalently bound into Ge{sub 2} dumbbells. > Most RE{sub 2}MgGe{sub 2} phases are antiferromagnetically ordered at cryogenic temperatures.

Suen, Nian-Tzu; Tobash, Paul H. [Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716 (United States); Bobev, Svilen, E-mail: bobev@udel.edu [Department of Chemistry and Biochemistry, University of Delaware, Newark, DE 19716 (United States)

2011-11-15T23:59:59.000Z

284

A neutron dose detector with REM response to 1 GeV  

Science Conference Proceedings (OSTI)

The limitation of current remmeters, which do not measure neutron dose equivalents above about 15 MeV, is a serious problem at high-energy accelerator facilities, where a much wider range of neutron energies exist. The purpose of this work was to measure the response of a modified Anderson-Braun (A-B) remmeter to neutron energies up to 1 GeV. The modifications to the standard A-B remmeter were based on the experimental results of Pb(n,xn) reactions.

Sun, R.K.; Krebs, G.F.; Smith, A.R. (Lawrence Berkeley Lab., CA (United States)); Hsu, H.H. (Los Alamos National Lab., NM (United States))

1992-07-01T23:59:59.000Z

285

SPIN Effects, QCD, and Jefferson Laboratory with 12 GeV electrons  

Science Conference Proceedings (OSTI)

QCD and Spin physics are playing important role in our understanding of hadron structure. I will give a short overview of origin of hadron structure in QCD and highlight modern understanding of the subject. Jefferson Laboratory is undergoing an upgrade that will increase the energy of electron beam up to 12 GeV. JLab is one of the leading facilities in nuclear physics studies and once operational in 2015 JLab 12 will be crucial for future of nuclear physics. I will briefly discuss future studies in four experimental halls of Jefferson Lab.

Prokudin, Alexey [JLAB

2013-11-01T23:59:59.000Z

286

Comments on momentum aperture of 100 GeV/n Au runs in RHIC  

Science Conference Proceedings (OSTI)

In RHIC 2010 100 GeV/n Au run, the momentum aperture has been an issue in the re-bucketing and the beam intensity lifetime in store. Both Blue and Yellow beams with comparable storage RF voltage and peak current have suffered more beam loss than in Run 2007. In this note, some comments are made for the momentum aperture of the lattices used from the Au runs in 2007, 2008 and 2010. From the wigglings and the beam decays of each lattice, information regarding the machine momentum aperture is presented. Several directions in further improvement are discussed.

Zhang, S.Y.

2011-11-01T23:59:59.000Z

287

Diphoton Decay Excess and 125 GeV Higgs Boson in Gauge-Higgs Unification  

E-Print Network (OSTI)

In the context of gauge-Higgs unification scenario in a 5-dimensional flat spacetime, we investigate Higgs boson production via gluon fusion and its diphoton decay mode at the LHC. We show that the signal strength of the Higgs diphoton decay mode observed at ATLAS and CMS, which is considerably larger than the Standard Model expectation, can be explained by a simple gauge-Higgs unification model with color-singlet bulk fermions to which a half-periodic boundary condition is assigned. The bulk fermions also play a crucial role in reproducing the observed Higgs boson mass around 125 GeV.

Nobuhito Maru; Nobuchika Okada

2013-03-23T23:59:59.000Z

288

Enhanced Direct Photon Production in Au+Au Collisions at 200 GeV in PHENIX  

E-Print Network (OSTI)

The production of electron pairs with transverse momentum between 1 and 5 GeV/c and mdirect photons, the direct photon yield in Au+Au was found to be enhanced compared to the binary-scaled p+p yield. The enhancement is consistent with an exponential inverse slope of 221 +- 23 +- 18 MeV and predictions from hydrodynamical models with initial temperature between 300 and 600 MeV at formation times of 0.6-0.15 fm/c.

S. Bathe; for the PHENIX Collaboration

2009-06-09T23:59:59.000Z

289

Recirculating Beam Breakup Study for the 12 GeV Upgrade at Jefferson Lab  

Science Conference Proceedings (OSTI)

Two new high gradient C100 cryomodules with a total of 16 new cavities were installed at the end of the CEBAF south linac during the 2011 summer shutdown as part of the 12-GeV upgrade project at Jefferson Lab. We surveyed the higher order modes (HOMs) of these cavities in the Jefferson Lab cryomodule test facility and CEBAF tunnel. We then studied recirculating beam breakup (BBU) in November 2011 to evaluate CEBAF low energy performance, measure transport optics, and evaluate BBU thresholds due to these HOMs. This paper discusses the experiment setup, cavity measurements, machine setup, optics measurements, and lower bounds on BBU thresholds by new cryomodules.

Ilkyoung Shin, Todd Satogata, Shahid Ahmed, Slawomir Bogacz, Mircea Stirbet, Haipeng Wang, Yan Wang, Byung Yunn, Ryan Bodenstein

2012-07-01T23:59:59.000Z

290

Nano-electron beam induced current and hole charge dynamics through uncapped Ge nanocrystals  

Science Conference Proceedings (OSTI)

Dynamics of hole storage in spherical Ge nanocrystals (NCs) formed by a two step dewetting/nucleation process on an oxide layer grown on an n-doped silicon substrate is studied using a nano-electron beam induced current technique. Carrier generation is produced by an electron beam irradiation. The generated current is collected by an atomic force microscope--tip in contact mode at a fixed position away from the beam spot of about 0.5 {mu}m. This distance represents the effective diffusion length of holes. The time constants of holes charging are determined and the effect of the NC size is underlined.

Marchand, A.; El Hdiy, A.; Troyon, M. [Laboratoire de Recherche en Nanosciences, Bat. 6, case no 15, UFR Sciences, Universite de Reims Champagne Ardenne, 51687 Reims Cedex 2 (France); Amiard, G.; Ronda, A.; Berbezier, I. [IM2NP, Faculte des Sciences et Techniques, Campus de Saint Jerome - Case 142, Avenue Escadrille Normandie Niemen, 13397 Marseille Cedex 20 (France)

2012-04-16T23:59:59.000Z

291

Conformal Higgs model: Charged gauge fields can produce a 125GeV resonance  

E-Print Network (OSTI)

In the conformal Higgs model, the dynamical value of parameter $\\lambda$ in Lagrangian term $-\\lambda(\\Phi^\\dag\\Phi)^2$ depends on the mass of an intermediate neutral boson field that combines interacting scalars $W^+_\\mu W_-^\\mu$ and $Z^*_\\mu Z^\\mu$. If this mass is $125GeV$, $\\lambda$ is negative and of order $10^{-88}$, in agreement with the empirical value deduced from well-established cosmological and electroweak data. Hence this intermediate scalar boson field is a candidate to explain the recently observed LHC resonance. The conformal Higgs model considers coupled fields: metric tensor $g_{\\mu\

R. K. Nesbet

2013-03-28T23:59:59.000Z

292

Size-Dependent Polar Ordering on Colloidal GeTe Nanocrystals  

SciTech Connect

The question of the nature and stability of polar ordering in nanoscale ferroelectrics is examined with colloidal nanocrystals of germanium telluride (GeTe). We provide atomic-scale evidence for room-temperature polar ordering in individual nanocrystals using aberration-corrected transmission electron microscopy and demonstrate a reversible, size-dependent polar-nonpolar phase transition of displacive character in nanocrystal ensembles. A substantial linear component of the distortion is observed, which is in contrast with theoretical reports predicting a toroidal state.

M Polking; J Urban; D Milliron; H Zheng; E Chan; M Caldwell; S Raoux; C Kisielowski; J Ager; et al.

2011-12-31T23:59:59.000Z

293

Vibration Response Testing of the CEBAF 12GeV Upgrade Cryomodules  

SciTech Connect

The CEBAF 12 GeV upgrade project includes 80 new 7-cell cavities to form 10 cryomodules. These cryomodules were tested during production to characterize their microphonic response in situ. For several early cryomodules, detailed (vibration) modal studies of the cryomodule string were performed during the assembly process to identify the structural contributors to the measured cryomodule microphonic response. Structural modifications were then modelled, implemented, and verified by subsequent modal testing and in-situ microphonic response testing. Interim and latest results from this multi-stage process will be reviewed.

Davis, G. Kirk [JLAB; Matalevich, Joseph R. [JLAB; Wiseman, Mark A. [JLAB; Powers, Thomas J. [JLAB

2012-09-01T23:59:59.000Z

294

Method of making active magnetic refrigerant materials based on Gd-Si-Ge alloys  

DOE Patents (OSTI)

An alloy made of heat treated material represented by Gd.sub.5(Si.sub.xGe.sub.1-x).sub.4 where 0.47.ltoreq.x.ltoreq.0.56 that exhibits a magnetic entropy change (-.DELTA.S.sub.m) of at least 16 J/kg K, a magnetostriction of at least 2000 parts per million, and a magnetoresistance of at least 5 percent at a temperature of about 300K and below, and method of heat treating the material between 800 to 1600 degrees C. for a time to this end.

Pecharsky, Alexandra O. (Ames, IA); Gschneidner, Jr., Karl A. (Ames, IA); Pecharsky, Vitalij K. (Ames, IA)

2006-10-03T23:59:59.000Z

295

Proposal for the Purchase, Without a Call for Tenders, of a Medium-Temperature Hot Water Boiler for the 300 GeV Accelerator  

E-Print Network (OSTI)

Proposal for the Purchase, Without a Call for Tenders, of a Medium-Temperature Hot Water Boiler for the 300 GeV Accelerator

1976-01-01T23:59:59.000Z

296

Vacuum-Pump Control System Using Programmable Logic Controllers on the TCP/IP Network for the 2.5-GeV Storage Ring  

E-Print Network (OSTI)

Vacuum-Pump Control System Using Programmable Logic Controllers on the TCP/IP Network for the 2.5-GeV Storage Ring

Kanaya, N; Maezawa, H; Factory, P

1999-01-01T23:59:59.000Z

297

run 873 - 7 September 1977, Rings 1 and 2 - 26 GeV, Orbit distortions due to sextupole fields with the low-beta insertion  

E-Print Network (OSTI)

run 873 - 7 September 1977, Rings 1 and 2 - 26 GeV, Orbit distortions due to sextupole fields with the low-beta insertion

Gourber, J P

1977-01-01T23:59:59.000Z

298

Run 888 - 28 October 1977, Rings 1 and 2 - GeV, Orbit distortion due to sextupole fields with the low-beta insertion - part 2  

E-Print Network (OSTI)

Run 888 - 28 October 1977, Rings 1 and 2 - GeV, Orbit distortion due to sextupole fields with the low-beta insertion - part 2

Brand, K

1978-01-01T23:59:59.000Z

299

Synchro-betatron resonances in the 8 GeV proton driver  

Science Conference Proceedings (OSTI)

The major difference of these two versions is the size (circumference) and the maximum energy. In the first study, the circumference is chosen to be 711.3m, which is 1.5 times the present Booster, with the maximum energy of 16 GeV. In the second version, it is mandated to be the same as Booster together with the same maximum energy of 8 GeV. One of the major impacts of the reduced size of the ring is the inevitable reduction in the total length of available space for injection/collimation/extraction systems and for rf cavities, 14 slots of 7.43m each in the smaller ring compared with 24 slots of 6.15m each in the larger ring. Since each cavity occupies a slot of 2.35m and 22 cavities are desirable, seven or eight slots out of 14 in the smaller ring must be reserved for rf, only six or seven remaining for all other systems. The constraint in space is particularly troublesome for the extraction system since the beam loss at extraction (at the highest beam energy) is the major concern of any high intensity proton machines.

Shoroku Ohnuma

2002-12-02T23:59:59.000Z

300

{Xi} ({Omega}) production in Pb + Pb collisions at 158 GeV/c  

SciTech Connect

Using the NA49 main TPC, the central production of ({Xi} + {bar {Xi}}) hyperons has been measured in CERN SPS Pb on Pb collisions at 158 GeV/c. The preliminary ({Xi} + {bar {Xi}})/ ({Lambda} + {bar {Lambda}}) ratio, studied at 2.0 < y < 2.6 and 1 < p{sub T} < 3 GeV/c, equals {approximately} (13 {+-} 4)% (systematic error only). It is compatible, within errors, with the previously obtained ratios for central S+S, S+W, and S+Au collisions. The fit to the transferse momentum distribution resulted in an inverse slope parameter T of 297 MeV. At this level of statistics we do not see any noticeable enhancement of hyperon production with the increased volume (and, possibly, degree of equilibration) of the system from S+S to Pb+Pb. This result is unexpected and counterintuitive, and should be further investigated. If confirmed, it will have a significant impact on our understanding of mechanisms leading to the enhanced strangeness production in heavy ion collisions.

Odyniec, G.; Cooper, G.E.; Jacobs, P. [and others

1997-06-01T23:59:59.000Z

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301

125 GeV Higgs Boson From Gauge-Higgs Unification: A Snowmass white paper  

E-Print Network (OSTI)

In certain five dimensional gauge theories compactified on the orbifold $S^1/Z_2$ the Standard Model Higgs doublet is identified with the zero mode of the fifth component of the gauge field. This gauge-Higgs unification scenario is realized at high energies, and the Standard Model as an effective theory below the compactification scale satisfies the boundary condition that the Higgs quartic coupling vanishes at the compactification scale (gauge-Higgs condition). This is because at energies above the compactification scale, the five dimensional gauge invariance is restored and the Higgs potential vanishes as a consequence. We consider scenario where top quark Yukawa and weak gauge coupling unification can be realized and identify the compactification scale as one at which this two coupling couplings have the same value. Taking into account the experimental uncertainties in measurements of the top quark mass and the QCD coupling constant, the Higgs mass prediction of 119-126 GeV from the gauge-Higgs unification scenario is consistent with the experimentally measured value of 125-126 GeV. More precise measurements of the top quark mass and the QCD coupling constant are crucial to reduce the interval of the Higgs mass prediction and thereby test the feasibility of the gauge-Higgs unification scenario.

Ilia Gogoladze; Nobuchika Okada; Qaisar Shafi

2013-07-18T23:59:59.000Z

302

Polarization components in $?^{0}$ photoproduction at photon energies up to 5.6 GeV  

E-Print Network (OSTI)

We present new data for the polarization observables of the final state proton in the $^{1}H(\\vec{\\gamma},\\vec{p})\\pi^{0}$ reaction. These data can be used to test predictions based on hadron helicity conservation (HHC) and perturbative QCD (pQCD). These data have both small statistical and systematic uncertainties, and were obtained with beam energies between 1.8 and 5.6 GeV and for $\\pi^{0}$ scattering angles larger than 75$^{\\circ}$ in center-of-mass (c.m.) frame. The data extend the polarization measurements data base for neutral pion photoproduction up to $E_{\\gamma}=5.6 GeV$. The results show non-zero induced polarization above the resonance region. The polarization transfer components vary rapidly with the photon energy and $\\pi^{0}$ scattering angle in c.m. frame. This indicates that HHC does not hold and that the pQCD limit is still not reached in the energy regime of this experiment.

W. Luo; E. J. Brash; R. Gilman; M. K. Jones; M. Meziane; L. Pentchev; C. F. Perdrisat; A. J. R. Puckett; V. Punjabi; F. R. Wesselmann; A. Ahmidouch; I. Albayrak; K. A. Aniol; J. Arrington; A. Asaturyan; O. Ates; H. Baghdasaryan; F. Benmokhtar; W. Bertozzi; L. Bimbot; P. Bosted; W. Boeglin; C. Butuceanu; P. Carter; S. Chernenko; M. E. Christy; M. Commisso; J. C. Cornejo; S. Covrig; S. Danagoulian; A. Daniel; A. Davidenko; D. Day; S. Dhamija; D. Dutta; R. Ent; S. Frullani; H. Fenker; E. Frlez; F. Garibaldi; D. Gaskell; S. Gilad; Y. Goncharenko; K. Hafidi; D. Hamilton; D. W. Higinbotham; W. Hinton; T. Horn; B. Hu; J. Huang; G. M. Huber; E. Jensen; H. Kang; C. Keppel; M. Khandaker; P. King; D. Kirillov; M. Kohl; V. Kravtsov; G. Kumbartzki; Y. Li; V. Mamyan; D. J. Margaziotis; P. Markowitz; A. Marsh; Y. Matulenko; J. Maxwell; G. Mbianda; D. Meekins; Y. Melnik; J. Miller; A. Mkrtchyan; H. Mkrtchyan; B. Moffit; O. Moreno; J. Mulholland; A. Narayan; Nuruzzaman; S. Nedev; E. Piasetzky; W. Pierce; N. M. Piskunov; Y. Prok; R. D. Ransome; D. S. Razin; P. E. Reimer; J. Reinhold; O. Rondon; M. Shabestari; A. Shahinyan; K. Shestermanov; S. Sirca; I. Sitnik; L. Smykov; G. Smith; L. Solovyev; P. Solvignon; I. I. Strakovsky; R. Subedi; R. Suleiman; E. Tomasi-Gustafsson; A. Vasiliev; M. Veilleux; S. Wood; Z. Ye; Y. Zanevsky; X. Zhang; Y. Zhang; X. Zheng; L. Zhu

2011-09-21T23:59:59.000Z

303

A lattice for the 50 GeV muon collider ring  

Science Conference Proceedings (OSTI)

A recent progress report on the lattice design of the 50-50 GeV muon collider is presented. The ring circumference needs to be as small as possible due to the short lifetime of the 50 GeV muons. The background at the detector is affected by the continuous decay of muons into electrons which requires a dipole between the high focusing quadrupoles and the detector. To obtain a luminosity on the order of 1{times}10{sup 33} cm{sup {minus}2} s{sup {minus}1} it is required to have beam intensities on the order of 1{times}10{sup 12} particles per bunch. The rms momentum spread of the beam is equal to 0.12% and the beta functions at the interaction point are equal to 4 cm. The maxima of the betatron functions at these quadrupoles are 1,300 m, resulting in large chromaticities which must be corrected by local chromatic correction. Pairs of horizontal and vertical chromatic sextupoles are located at locations where the corresponding betatron functions are 100 m and the values of the horizontal dispersion functions are 3 and 2 m, respectively. They are carefully placed so that most of their nonlinear effects are canceled. The dynamic aperture is larger than 7 times the mean size of the beam for the momentum offsets larger than {minus}6 and +10 sigmas.

Trbojevic, D. [Brookhaven National Lab., Upton, NY (United States); Ng, K.Y.; Weishi, W. [Fermi National Accelerator Lab., Batavia, IL (United States)

1998-08-01T23:59:59.000Z

304

Studies of Nucleon Form Factors with 12 GeV CEBAF and SuperBigBite  

SciTech Connect

The elastic electromagnetic form factors are among the most fundamental quantities that describe the ground-state structure of the proton and neutron. Precision data of the form factors over a wide kinematical range provide a powerful test of current theories of hadron structure. A number of experiments aiming to measure the electric and magnetic elastic form factors of the neutron, G{sub E}{sup n} and G{sub M}{sup n}, and proton, G{sub E}{sup p}, at very high momentum transfer, up to the range of Q{sup 2} = 10-14 (GeV/c){sup 2}, are planned to be carried out with the future 11 GeV electron beam of the upgraded CEBAF at Jefferson Lab. These experiments will determine the nucleon form factors with unprecedented precision to Q{sup 2}-values up to three times higher than those of existing data. We review the approved proposals and the conceptual design of a new spectrometer, SuperBigBite, that will be used in these and other future experiments at Jefferson Lab.

Jens-Ole Hansen

2012-04-01T23:59:59.000Z

305

The magnet lattice of the LBL 1-2 GeV Synchrotron Radiation Source  

SciTech Connect

This paper describes the magnet chosen for the LBL 1-2 GeV Synchrotron Radiation Source. The structure has a circumference of 196.8 m, with 12 dispersion free straight sections that can accommodate insertion devices up to 5 m long. The achromatic arcs that connect these straight sections feature combined function (gradient) bending magnets. Utilization of three such magnets in the so-called three-bend-achromat (TBA) arrangement, has several beneficial effects: (1) it reduces the amplitude of the vertical beta-function in the bending magnets, thereby minimizing the required aperture; (2) it changes the damping partition number in such a way as to reduce the natural emittance; and (3) it produces separation of the beta-functions such that relatively low sextupole strengths are sufficient for chromatic correction. The result is a structure with very low emittance (4 nm-rad at 1.5 GeV) that is correctable with only two families of sextupoles while maintaining excellent chromatic properties and acceptable dynamic aperture. In this paper we describe the details of the storage ring and discuss the characteristic features of the lattice.

Jackson, A.

1987-03-01T23:59:59.000Z

306

Novel Higgs-to-125 GeV Higgs boson decays in the complex NMSSM  

E-Print Network (OSTI)

In the Next-to-Minimal Supersymmetric Standard Model (NMSSM) a variety of parameter configurations yields a Higgs boson consistent with the one observed at the LHC. Additionally, the Higgs sector of the model can contain explicit CP-violating phases even at the tree level, in contrast with the Minimal Supersymmetric Standard Model (MSSM). In this article we present the complete one-loop Higgs boson mass matrix of the complex NMSSM in the renormalisation-group improved effective potential approach. We also present the trilinear Higgs boson self-couplings and the complete set of expressions for various partial decay widths of a generic CP-mixed Higgs boson in the model. We then analyse a very interesting phenomenological scenario wherein the decay of a relatively light pseudoscalar-like Higgs boson into ~ 125 GeV SM-like Higgs boson(s) is induced by non-zero CP-violating phases. We discuss in detail a few benchmark cases in which such a decay can contribute significantly to the production of SM-like Higgs bosons at the LHC on top of the gluon fusion process. It can thus be partially responsible for the gamma.gamma excess near 125 GeV due to the subsequent decay of the SM-like Higgs boson. Such a scenario is extremely difficult to realize in the complex MSSM and, if probed at the LHC, it could provide an indication of the non-minimal nature of supersymmetry.

Shoaib Munir

2013-10-30T23:59:59.000Z

307

Environmental assessment of the proposed 7-GeV Advanced Photon Source  

SciTech Connect

The potential environmental impacts of construction and operation of a 6- to 7-GeV synchrotron radiation source known as the 7-GeV Advanced Photon Source at Argonne National Laboratory were evaluated. Key elements considered include on- and off-site radiological effects; socioeconomic effects; and impacts to aquatic and terrestrial flora and fauna, wetlands, water and air quality, cultural resources, and threatened or endangered species. Also incorporated are the effects of decisions made as a result of the preliminary design (Title I) being prepared. Mitigation plans to further reduce impacts are being developed. These plans include coordination with the US Army Corps of Engineers (COE) and other responsible agencies to mitigate potential impacts to wetlands. This mitigation includes providing habitat of comparable ecological value to assure no net loss of wetlands. These mitigation actions would be permitted and monitored by COE. A data recovery plan to protect cultural resources has been developed and approved, pursuant to a Programmatic Agreement among the US Department of Energy, the Advisory Council on Historic Preservation, and the Illinois State Historic Preservation Office. Applications for National Emission Standard for Hazardous Air Pollutants (NESHAP) and air emissions permits have been submitted to the US Environmental Protection Agency (EPA) and the Illinois Environmental Protection Agency (IEPA), respectively. 71 refs., 10 figs., 11 tabs.

Not Available

1990-02-01T23:59:59.000Z

308

GeV Wakefield acceleration of low energy electron bunches using Petawatt lasers  

Science Conference Proceedings (OSTI)

The possibility of accelerating electrons to the GeV level using a Petawatt laser focused in a uniform plasma is investigated. The proposed scheme relies on the wakefield acceleration of an electron bunch from a state-of-the-art radio-frequency accelerator. Using an analytical model as well as numerical simulations performed with WAKE [P. Mora and T. M. Antonsen, Phys. Plasmas 4, 217 (1997)], a systematical study of the injector parameters is carried out. In particular, it is found that the quality of the accelerated electron bunch--in terms of bunch length and energy spread--depends crucially on the injection energy. Injection energies of a few MeV lead to a GeV electron beam with sub-100 fs bunches and 10% energy spreads. Most of the features of the acceleration process can be explained within the linear response framework, including both the reduction of energy spread and bunch length at low injection energies. The role of nonlinear effects is discussed.

Lifschitz, A.F.; Faure, J.; Malka, V.; Mora, P. [Laboratoire d'Optique Appliquee, Ecole Polytechnique, ENSTA, CNRS, UMR 7639, 91761 Palaiseau (France); Laboratoire de Physique Theorique, Ecole Polytechnique, CNRS, UMR 7644, 91128 Palaiseau (France)

2005-09-15T23:59:59.000Z

309

Higher-Order Spin Resonances in 2.1 GeV/c Polarized Proton Beam  

Science Conference Proceedings (OSTI)

Spin resonances can cause partial or full depolarization or spin-flip of a polarized beam. We studied 1st-, 2nd- and 3rd-order spin resonances with a 2.1 GeV/c vertically polarized proton beam stored in the COSY Cooler Synchrotron. We observed almost full spin-flip when crossing the 1st-order G*gamma=8?nuy vertical-betatron-tune spin resonance and partial depolarization near some 2nd- and 3rd-order resonances. We observed almost full depolarization near the 1st-order G*gamma=8?nux horizontal spin resonance and partial depolarization near some 2nd- and 3rd-order resonances. Moreover, we found that a 2nd-order nux resonance seems about as strong as some 3rd-order nux resonances, while some 3rd-order nuy resonances seem much stronger than a 2nd-order nuy resonance. It was thought that, for flat accelerators, vertical spin resonances are stronger than horizontal, and lower order resonances are stronger than higher order ones. The data suggest that many higher-order spin resonances, both horizontal and vertical, must be overcome to accelerate polarized protons to high energies; the data may help RHIC to better overcome its snake resonances between 100 and 250 GeV/c.

Leonova, M A; Gordon, K N; Krisch, A D; Liu, J; Nees, D A; Raymond, R S; Sivers, D W; Wong, V K; Hinterberger, F

2011-03-01T23:59:59.000Z

310

Higher-Order Spin Resonances in 2.1 GeV/c Polarized Proton Beam  

SciTech Connect

Spin resonances can cause partial or full depolarization or spin-flip of a polarized beam. We studied 1st-, 2nd- and 3rd-order spin resonances with a 2.1 GeV/c vertically polarized proton beam stored in the COSY Cooler Synchrotron. We observed almost full spin-flip when crossing the 1st-order G*gamma=8?nuy vertical-betatron-tune spin resonance and partial depolarization near some 2nd- and 3rd-order resonances. We observed almost full depolarization near the 1st-order G*gamma=8?nux horizontal spin resonance and partial depolarization near some 2nd- and 3rd-order resonances. Moreover, we found that a 2nd-order nux resonance seems about as strong as some 3rd-order nux resonances, while some 3rd-order nuy resonances seem much stronger than a 2nd-order nuy resonance. It was thought that, for flat accelerators, vertical spin resonances are stronger than horizontal, and lower order resonances are stronger than higher order ones. The data suggest that many higher-order spin resonances, both horizontal and vertical, must be overcome to accelerate polarized protons to high energies; the data may help RHIC to better overcome its snake resonances between 100 and 250 GeV/c.

Leonova, M A; Gordon, K N; Krisch, A D; Liu, J; Nees, D A; Raymond, R S; Sivers, D W; Wong, V K; Hinterberger, F

2011-03-01T23:59:59.000Z

311

Investigation of the kinetics of surface-limited thin film growth of SiGe alloys  

SciTech Connect

The kinetics of surface-limited thin film growth of SiGe alloys was investigated by time-resolved surface differential reflectometry. The source gas, mixtures of disilane and digermane in ratios from 1:1 to 6:1 in helium carrier gas, was delivered to a heated substrate by a fast-acting pulsed molecular jet valve. The adsorption and desorption kinetics were determined from the surface differential reflectance signal obtained using a polarized, high-stability HeNe probe laser. Thin film growth was studied in the temperature range of 400--600{degrees}C on Si(001) substrates. Preferential incorporation of digermane into the film produces an alloy composition that depends upon but does not mirror the gas composition. For all gas mixtures, there is a strong temperature dependence of the rate at which the adsorption layer decomposes into film plus by-product. The kinetic data and the alloy compositions provide a basis for deducing some of the characteristics of the reaction sequence that leads to SiGe alloy thin film growth.

Sharp, J.W. [Tennessee Univ., Knoxville, TN (United States). Dept. of Physics and Astronomy; Eres, G. [Oak Ridge National Lab., TN (United States)

1992-11-01T23:59:59.000Z

312

Investigation of the kinetics of surface-limited thin film growth of SiGe alloys  

SciTech Connect

The kinetics of surface-limited thin film growth of SiGe alloys was investigated by time-resolved surface differential reflectometry. The source gas, mixtures of disilane and digermane in ratios from 1:1 to 6:1 in helium carrier gas, was delivered to a heated substrate by a fast-acting pulsed molecular jet valve. The adsorption and desorption kinetics were determined from the surface differential reflectance signal obtained using a polarized, high-stability HeNe probe laser. Thin film growth was studied in the temperature range of 400--600[degrees]C on Si(001) substrates. Preferential incorporation of digermane into the film produces an alloy composition that depends upon but does not mirror the gas composition. For all gas mixtures, there is a strong temperature dependence of the rate at which the adsorption layer decomposes into film plus by-product. The kinetic data and the alloy compositions provide a basis for deducing some of the characteristics of the reaction sequence that leads to SiGe alloy thin film growth.

Sharp, J.W. (Tennessee Univ., Knoxville, TN (United States). Dept. of Physics and Astronomy); Eres, G. (Oak Ridge National Lab., TN (United States))

1992-11-01T23:59:59.000Z

313

Adsorption, thermal reaction, and desorption of disilane on Ge(111)-[ital c](2[times]8)  

DOE Green Energy (OSTI)

Room-temperature adsorption of disilane (Si[sub 2]H[sub 6]) on Ge(111)-[ital c](2[times]8) and subsequent thermal reactions and desorption at elevated temperatures were studied using scanning tunneling microscopy and core-level photoemission. The initial adsorption results in the formation of various surface radicals, and the reacted areas on the surface grow laterally for increasing exposures. The sticking coefficient is rather low, and an exposure greater than about 30 000 langmuirs is needed to saturate the surface. The net amount of Si deposited for the saturated surface is about one-half of an atomic layer. Thermal annealing causes the hydrogen atoms to desorb and the Si atoms to move below the surface. For annealing temperatures beyond about 630 K, the desorption of hydrogen becomes complete, all of the Si atoms move below the surface, and the resulting surface resembles the starting clean Ge(111)-[ital c](2[times]8) surface except that the [ital c](2[times]8) long-range order is partially destroyed. Step flow and island coarsening, similar to growth by molecular-beam epitaxy, are observed.

Lin, D.; Hirschorn, E.S.; Miller, T.; Chiang, T. (Department of Physics, University of Illinois, 1110 West Green Street, Urbana, Illinois 61801-3080 (United States) Materials Research Laboratory, University of Illinois, 104 South Goodwin Avenue, Urbana, Illinois 61801-2902 (United States))

1994-01-15T23:59:59.000Z

314

Design of the Trigger Interface and Distribution Board for CEBAF 12 GeV Upgrade  

SciTech Connect

The design of the Trigger Interface and Distribution (TID) board for the 12 GeV Upgrade at the Continuous Electron Beam Accelerator Facility (CEBAF) at TJNAL is described. The TID board distributes a low jitter system clock, synchronized trigger, and synchronized multi-purpose SYNC signal. The TID also initiates data acquisition for the crate. With the TID boards, a multi-crate system can be setup for experiment test and commissioning. The TID board can be selectively populated as a Trigger Interface (TI) board, or a Trigger Distribution (TD) board for the 12 GeV upgrade experiments. When the TID is populated as a TI, it can be located in the VXS crate and distribute the CLOCK/TRIGGER/SYNC through the VXS P0 connector; it can also be located in the standard VME64 crate, and distribute the CLOCK/TRIGGER/SYNC through the VME P2 connector or front panel. It initiates the data acquisition for the front crate where the TI is positioned in. When the TID is populated as a TD, it fans out the CLOCK/TRIGGER/SYNC from trigger supervisor to the front end crates through optical fibres. The TD monitors the trigger processing on the TIs, and gives feedback to the TS for trigger flow control. Field Programmable Gate Arrays (FPGA) is utilised on TID board to provide programmability. The TID boards were intensively tested on the bench, and various setups.

Gu, Jianhui; Dong, Hai; Cuevas, R; Gyurjyan, Vardan; Heyes, William; Jastrzembski, Edward; Kaneta, Scott; Nganga, Nicholas; Moffit, Bryan; Raydo, Benjamin; Timmer, Carl

2012-10-01T23:59:59.000Z

315

The Cosmic-Ray antiproton flux between 3 and 49 GeV  

E-Print Network (OSTI)

We report on a new measurement of the cosmic ray antiproton spectrum. The data were collected by the balloon-borne experiment CAPRICE98 which was flown on 28-29 May 1998 from Fort Sumner, New Mexico, USA. The experiment used the NMSU-WIZARD/CAPRICE98 balloon-borne magnet spectrometer equipped with a gas Ring Imaging Cherenkov (RICH) detector, a time-of-flight system, a tracking device consisting of drift chambers and a superconducting magnet and a silicon-tungsten calorimeter. The RICH detector was the first ever flown capable of mass-resolving charge-one particles at energies above 5 GeV. A total of 31 antiprotons with rigidities between 4 and 50 GV at the spectrometer were identified with small backgrounds from other particles. The absolute antiproton energy spectrum was determined in the kinetic energy region at the top of the atmosphere between 3.2 and 49.1 GeV. We found that the observed antiproton spectrum and the antiproton-to-proton ratio are consistent with a pure secondary origin. However, a primary component may not be excluded.

WiZard/CAPRICE Collaboration

2001-03-30T23:59:59.000Z

316

Microsoft Word - 1aDOE-ID-12-048 GE EC B3-6.doc  

NLE Websites -- All DOE Office Websites (Extended Search)

8 8 SECTION A. Project Title: Ferritic Martensitic Alloys as Accident Tolerant Fuel Cladding Material for Light Water Reactors - GE Global Research SECTION B. Project Description The GE Global Research (GE-GRC) team, which includes the University of Michigan, Los Alamos National Laboratory, and Global Nuclear Fuels, will demonstrate the feasibility that ferritic materials will be suitable for fuel cladding material in current light water reactors as accident tolerant fuel. The objective is to show feasibility that traditional and nano-structured ferritic/martensitic alloys are candidate materials for fuel cladding in light water reactors. Studies will be conducted in parallel with current zirconium alloys cladding materials. SECTION C. Environmental Aspects / Potential Sources of Impact

317

Photon and neutral pion production in Au+Au collisions at sqrt(s_{NN}) = 130 GeV  

E-Print Network (OSTI)

We report the first inclusive photon measurements about mid-rapidity (|y|Photon pair conversions were reconstructed from electron and positron tracks measured with the Time Projection Chamber (TPC) of the STAR experiment. With this method, an energy resolution of Delta(E)/E = 2% at 0.5 GeV has been achieved. Reconstructed photons have also been used to measure the transverse momentum (pt) spectra of pi0 mesons about mid-rapidity (|y| photon photon decay channel. The fractional contribution of the pi0 -> photon photon decay to the inclusive photon spectrum decreases by 20% +/- 5% between pt = 1.65 GeV/c and pt = 2.4 GeV/c in the most central events, indicating that relative to pi0 -> photon photon decay the contribution of other photon sources is substantially increasing.

STAR Collaboration

2004-01-08T23:59:59.000Z

318

Atomic-level investigation of the growth of Si/Ge by ultrahigh vacuum chemical vapor deposition  

SciTech Connect

Si and Ge films can be prepared under ultrahigh vacuum conditions by chemical vapor deposition using disilane and digermane as source gases. These gases offer a high sticking probability, and are suitable for atomic layer epitaxy. Using synchrotron radiation photoemission spectroscopy and scanning tunneling microscopy, we have examined the surface processes associated with the heteroepitaxial growth of Ge/Si. The measured surface-induced shifts and chemical shifts of the Si 2p and Ge 3d core levels allow us to identify the surface species and to determine the surface chemical composition, and this information is correlated with the atomic features observed by scanning tunneling microscopy. Issues related to precursor dissociation, attachment to dangling bonds, diffusion, surface segregation, growth morphology, and pyrolytic reaction pathways will be discussed. {copyright} {ital 1997 American Vacuum Society.}

Lin, D. [Institute of Physics, National Chiao-Tung University, Hsinchu, Taiwan, Republic of (China)] [Institute of Physics, National Chiao-Tung University, Hsinchu, Taiwan, Republic of (China); Miller, T.; Chiang, T. [Department of Physics and Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801 (United States)] [Department of Physics and Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801 (United States)

1997-05-01T23:59:59.000Z

319

Topological cross sections and multiplicity moments for $pi$$sup -$p interactions at 250 GeV/c  

SciTech Connect

The data are from a 46,000 picture exposure of the 15-foot hydrogen bubble chamber at Fermilab to a 250-GeV/c $pi$$sup -$run. An inelastic cross section of 21.1 +- 0.6 mb was obtained. Topological cross sections and multiplicity moments are presented and compared with results at lower energies. The energy dependence of the mean charged multiplicity, (n), and the second moment, f$sub 2$, are well fit by a polynomial in log's for $pi$$sup -$p experiment from 10 to 250 GeV/c. (auth)

Hagopian, S.; Albright, J.R.; Hays, P.

1975-01-01T23:59:59.000Z

320

Hot Cell Examination of Broken GE14 Spacer Grid and Sound Fuel Rod Irradiated in Forsmark-3 BWR  

Science Conference Proceedings (OSTI)

A Global Nuclear Fuel (GNF)-designed GE14 fuel rod8212operated to approximately 40 GWd/MTU bundle average exposure in the Forsmark-3 boiling water reactor (BWR) in Osthammar, Sweden8212was examined at the Studsvik Nuclear hot cell laboratory in Nykping, Sweden. During re-channeling and rod retrieval, it was found that the first spacer grid was broken in the same bundle. Along with the one sound GE14 fuel rod, the broken spacer grid piece was sent to the Studsvik facility for examination. This report prov...

2008-10-23T23:59:59.000Z

Note: This page contains sample records for the topic "ge appliances ge" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


321

A Higgs boson near 125 GeV with enhanced di-photon signal in the NMSSM  

E-Print Network (OSTI)

A natural region in the parameter space of the NMSSM can accomodate a CP-even Higgs boson with a mass of about 125 GeV and, simultaneously, an enhanced cross section times branching ratio in the di-photon channel. This happens in the case of strong singlet-doublet mixing, when the partial width of a 125 GeV Higgs boson into bb is strongly reduced. In this case, a second lighter CP-even Higgs boson is potentially also observable at the LHC.

Ulrich Ellwanger

2011-12-15T23:59:59.000Z

322

A Higgs boson near 125 GeV with enhanced di-photon signal in the NMSSM  

E-Print Network (OSTI)

A natural region in the parameter space of the NMSSM can accomodate a CP-even Higgs boson with a mass of about 125 GeV and, simultaneously, an enhanced cross section times branching ratio in the di-photon channel. This happens in the case of strong singlet-doublet mixing, when the partial width of a 125 GeV Higgs boson into bb is strongly reduced. In this case, a second lighter CP-even Higgs boson is potentially also observable at the LHC.

Ellwanger, Ulrich

2011-01-01T23:59:59.000Z

323

Kinetics of hydrogen desorption in surface-limited thin-film growth of SiGe alloys  

DOE Green Energy (OSTI)

The kinetics of hydrogen desorption in surface-limited thin-film growth of SiGe alloys from binary mixtures of disilane and digermane was investigated by surface differential reflectance. The hydrogen desorption process from the alloy surface was found to consist of two components. Both components are thermally activated, but the activation energies appear to equal neither the hydrogen desorption energy from pure silicon nor that from pure germanium surfaces. We suggest that the two components represent Ge- and Si-mediated hydrogen desorption, with the former being more rapid than the latter.

Sharp, J.W. (Department of Physics and Astronomy, The University of Tennessee, Knoxville, Tennessee 37996 (United States)); Eres, G. (Oak Ridge National Laboratory, P. O. Box 2008, Solid State Division, Bldg. 2000 MS 6056, Oak Ridge, Tennessee 37831-6056 (United States))

1993-05-31T23:59:59.000Z

324

Fuel Reliability Program: Hot Cell Investigation and Assessment of GE14 Failures in Browns Ferry Unit 3  

Science Conference Proceedings (OSTI)

Browns Ferry 3 Cycle 12 began operation in April 2004, but on July 19, 2004, an off-gas radiation monitor increase and subsequent grab sample confirmed the presence of failures in two second-cycle GE14 (10 x 10) bundles. The failures coincided with power changes during a control rod sequence exchange; however, local rod power and the change in rod power levels were well below design limits and operating experience from another GE14 failure in Hatch Unit 1 (described in Electric Power Research Institute [...

2010-09-01T23:59:59.000Z

325

Exclusive Photoproduction of Charged Pions in Hydrogen and Deuterium from 1 to 6 GeV  

DOE Green Energy (OSTI)

The study of the transition region in the description of exclusive processes and hadron structure, from the nucleon-meson degrees of freedom in meson-exchange models at low energy to the quark-gluon degrees of freedom in pQCD at high energy, is essential for us to understand the strong interaction. The differential cross section measurements for exclusive reactions at fixed center-of-mass angles enable us to investigate the constituent counting rule, which explicitly connects the quark-gluon degrees of freedom to the energy dependence of differential cross sections. JLab Experiment E94-104 was carried out in Hall A with two high resolution spectrometers. It included the coincidence cross section measurement for the [gamma]n --> pi{sup -}[p] process with a deuterium target and the singles measurement for the [gamma]p --> pi{sup +}[n] process with a hydrogen target. The untagged real photons were generated by the electron beam impinging on a copper radiator. The photon energies ranged from 1.1 to 5.5 GeV, corresponding to the center-of-mass energies from 1.7 to 3.4 GeV. The pion center-of-mass angles were fixed at 50 deg, 70 deg, 90 deg, and also 100 deg, 110 deg at a few energies. The JLab E94-104 data presented in this thesis contain four interesting features. The data exhibit a global scaling behavior for both [pi]{sup -} and [pi]{sup +} photoproduction at high energies and high transverse momenta, consistent with the constituent counting rule and the existing [pi]{sup +} photoproduction data. This implies that the quark-gluon degrees of freedom start to play a role at this energy scale. The data suggests possible substructure of the scaling behavior, which might be oscillations around the scaling value. There are several possible mechanisms that can cause oscillations, for example the one associated with the generalized constituent counting rule involving quark orbital angular momentum. The data show an enhancement in the scaled cross section at center-of-mass energy near 2.2 GeV, where baryon resonances are not as well known as those at low energies. The differential cross section ratios for exclusive [gamma]n --> pi{sup -}[p] to [gamma]p --> pi{sup +}[n] process at [theta]{sub cm} = 90 deg start to show consistency with the prediction based on one-hard-gluon-exchange diagrams at high energies.

Lingyan Zhu

2004-02-28T23:59:59.000Z

326

STATEMENT OF CONSIDERATIONS REQUEST BY GE WIND ENERGY, LLC FOR AN ADVANCE WAIVER OF  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

WIND ENERGY, LLC FOR AN ADVANCE WAIVER OF WIND ENERGY, LLC FOR AN ADVANCE WAIVER OF DOMESTIC AND FOREIGN PATENT RIGHTS UNDER NREL SUBCONTRACT NO. ZAM-3-31235-05 UNDER DOE CONTRACT NO. DE-AC36-98GO10337; W(A)-03-033; CH-1159 As set out in the attached waiver petition and in subsequent discussions with DOE Patent Counsel, GE Wind Energy, LLC (GEWE) has requested an advance waiver of domestic and foreign patent rights for all subject inventions made under the above-identified subcontract by its employees and its subcontractors' employees, regardless of tier, except inventions made by subcontractors eligible to retain title to inventions pursuant to P.L. 96-517, as amended, and National Laboratories. Referring to item 2 of GEWE's waiver petition, the purpose of this agreement encompasses the design, development, and testing of a 5.0 megawatt (MW) low wind speed

327

Microsoft Word - 41020_GE_Adv Combustion System_Factsheet_Rev01_10-03.doc  

NLE Websites -- All DOE Office Websites (Extended Search)

FACT SHEET FACT SHEET Advanced Combustion Systems for Next Generation Gas Turbines I.) Participants: Principal Investigator: General Electric, Air Force Research Lab II.) Description A. Objective: Develop a new gas turbine combustion system design with 50% lower emissions, and demonstrate it at sub-scale. The system will be compared with state-of- the-art lean premixed gas turbine NOx emissions at temperatures and pressures comparable to GE F-Class turbines. B. Background/Relevancy: Next generation turbine power plants will require high efficiency gas turbines with higher combustor pressures and firing temperatures than is currently available. These increases in the severity of gas turbine operating conditions will tend to increase NOx emissions. As the desire for higher efficiency drives combustor pressures

328

Microsoft Word - 42643_GE_Hydrogen Turbine_Factsheet_Rev B_12-08-06.doc  

NLE Websites -- All DOE Office Websites (Extended Search)

3 - Advanced IGCC/H2 Gas Turbine Development 3 - Advanced IGCC/H2 Gas Turbine Development Revision B 1 December 2006 FACT SHEET I. PROJECT PARTICIPANTS A. Prime Participant: General Electric Company, GE Energy B. Sub-Award Participant: General Electric Company, Global Research Center II. PROJECT DESCRIPTION A. Objective(s): The objective of this project is to design and develop a fuel flexible (coal derived hydrogen or syngas) gas turbine for IGCC and FutureGen type applications that meets DOE turbine performance goals. The overall DOE Advanced Power System goal is to conduct, by 2010, the research and development (R&D) necessary to produce coal-based IGCC power systems with high efficiency (45-50% (HHV)), near-zero emissions (less than 3 ppm v NOx @ 15% O 2 ) and competitive capital cost (< $1000/kW).

329

Categorical Exclusion Determination Form Proposed Action Title: (0672-1502) General Electric Global Research (GE) -  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

'Department of Energy 'Department of Energy Categorical Exclusion Determination Form Proposed Action Title: (0672-1502) General Electric Global Research (GE) - Chilled Natural Gas for At-Home Refueling Program or Field Office: Advanced Research Projects Agency - Energy LocationCs) CCity/County/State): Niskayuna, NY; Troy, NY; Columbia, MO Proposed Action Description: Funding will support efforts to develop a compressor technology for at-home refueling of natural gas vehicles. Proposed work will consist of: (1) development, synthesis, and testing of small quantities of adsorbent material at a dedicated laboratory facility on the University of Missouri campus in Columbia, MO; (2) design, fabrication (or procurement), and testing of compressor system components, including a cryocooler and an accumulator, at Chart Industries, Inc.'s commercial development and assembly site in Troy, NY; and (3) assembly

330

Direct Observation of Room-Temperature Polar Ordering in Colloidal GeTe Nanocrystals  

SciTech Connect

Ferroelectrics and other materials that exhibit spontaneous polar ordering have demonstrated immense promise for applications ranging from non-volatile memories to microelectromechanical systems. However, experimental evidence of polar ordering and effective synthetic strategies for accessing these materials are lacking for low-dimensional nanomaterials. Here, we demonstrate the synthesis of size-controlled nanocrystals of the polar material germanium telluride (GeTe) using colloidal chemistry and provide the first direct evidence of room-temperature polar ordering in nanocrystals less than 5 nm in size using aberration-corrected transmission electron microscopy. Synchrotron x-ray diffraction and Raman studies demonstrate a sizeable polar distortion and a reversible size-dependent polar phase transition in these nanocrystals. The stability of polar ordering in solution-processible nanomaterials suggests an economical avenue to Tbit/in2-density non-volatile memory devices and other applications.

Polking, Mark J.; Zheng, Haimei; Urban, Jeffrey J.; Milliron, Delia J.; Chan, Emory; Caldwell, Marissa A.; Raoux, Simone; Kisielowski, Christian F.; Ager III, Joel W.; Ramesh, Ramamoorthy; Alivisatos, A.P.

2009-12-07T23:59:59.000Z

331

Multi-GeV Neutrino Emission from Magnetized Gamma Ray Bursts  

E-Print Network (OSTI)

We investigate the expected neutrino emissivity from nuclear collisions in magnetically dominated collisional models of gamma-ray bursts, motivated by recent observational and theoretical developments. The results indicate that significant multi-GeV neutrino fluxes are expected for model parameter values which are typical of electromagnetically detected bursts. We show that for detecting at least one muon event in Icecube and its Deep Core sub-array, a single burst must be near the high end of the luminosity function and at a redshift $z\\lesssim 0.2$. We also calculate the luminosity and distance ranges that can generate $0.01-1$ muon events per GRB in the same detectors, which may be of interest if simultaneously detected electromagnetically, or if measured with future extensions of Icecube or other neutrino detectors with larger effective volume and better sensitivity.

Shan Gao; Peter Meszaros

2011-12-23T23:59:59.000Z

332

Concerning the energy levels of silver in Ge-Si alloys  

Science Conference Proceedings (OSTI)

The emission from impurity states of silver (an element of the IB subgroup) in a Ge-Si alloy, containing 18 at % Si, has been studied. The donor level of silver has been found in crystals doubly doped with gallium and silver, while its first acceptor level has been revealed in crystals doped with only silver. Single crystals were grown by pulling from a melt using a feeding rod. Doping with gallium was performed by introducing this element into the feeding rod, and silver was introduced into the crystals via diffusion. The positions of the donor and first acceptor Ag levels with respect to the top of the valence band were found by analyzing the temperature dependence of the Hall coefficient and the electroneutrality equation for the crystal: 0.06 and 0.29 eV, respectively.

Tahirov, V. I. [Baku State University (Azerbaijan); Agamaliev, Z. A. [National Academy of Sciences of Azerbaijan, Institute of Physics (Azerbaijan); Sadixova, S. R.; Guliev, A. F.; Gahramanov, N. F., E-mail: n_gakhramanov@mail.ru [Sumgait State University (Azerbaijan)

2012-03-15T23:59:59.000Z

333

Neutral strange particle production in $pi$ tau interactions at 250 GeV/c  

SciTech Connect

Neutral strange particles were studied in about one third of a 46,000 picture exposure of 250-GeV/c pions in the Fermilab 15 foot bubble chamber. This chamber is particularly well suited for the study of neutral particles because of its large volume. Experimental inclusive cross sections are sigma (K/sub s/$sup 0$) equals 4.17 +- 0.45 mb, sigma (LAMBDA$sup 0$) = 1.74 +- 0.24 mb, sigma (anti LAMBDA$sup 0$) = 0.82 +- 0.13 mb. The average number of K/sub s/$sup 0$, LAMBDA$sup 0$, anti LAMBDA$sup 0$ per inelastic collision are approximately independent of charge multiplicity. F$sub 1$(x) and F$sub 2$(p/sup 2// sub t/) distributions as well as two strange particle mass plots are presented. (auth)

Bogert, D.; Hanft, R.; Harris, R.

1975-01-01T23:59:59.000Z

334

Progress on Neutron-Target Multipoles above 1 GeV  

SciTech Connect

We report a new extraction of nucleon resonance couplings using ?{sup ?} photo-production cross sections on the neutron. The world database for the process ?n ? ?{sup ?}p above 1 GeV has quadrupled with the addition of new differential cross sections from the CEBAF Large Acceptance Spectrometer (CLAS) at Jefferson Lab in Hall B. Differential cross sections from CLAS have been improved with a new final-state interaction determination using a diagrammatic technique taking into account the SAID phenomenological NN and ?N final-state interaction amplitudes. Resonance couplings have been extracted and compared to previous determinations. With the addition of these new cross sections, significant changes are seen in the high-energy behavior of the SAID cross sections and amplitudes.

Strakovsky, I I; Gao, H; Briscoe, W J; Dutta, D; Kudryavtsev, A E; Mirazite, M; Paris, M; Rossi, P; Stepanyan, S; Tarasov, V E

2012-12-01T23:59:59.000Z

335

A new Fermi smearing approach for scattering of multi-GeV electrons by nuclei  

E-Print Network (OSTI)

The cross section for electron scattering by nuclei at high momentum transfers is calculated within the Fermi smearing approximation (FSA), where binding effects on the struck nucleon are introduced via the relativistic Hartree approximation (RHA). The model naturally preserves current conservation, since the response tensor for an off-shell nucleon conserves the same form that for a free one but with an effective mass. Different parameterizations for the inelastic nucleon structure function, are analyzed. The smearing at the Fermi surface is introduced through a momentum distribution obtained from a perturbative nuclear matter calculation. Recent CEBAF data on inclusive scattering of 4.05 GeV electrons on $^{56}$Fe are well reproduced for all measured geometries for the first time, as is evident from the comparison with previous calculations.

A. Mariano; P. Podesta Lerma

2003-05-29T23:59:59.000Z

336

1 GeV CW nonscaling FFAG for ADS, and magnet parameters  

SciTech Connect

Multi-MW proton driver capability remains a challenging, critical technology for many core HEP programs, particularly the neutrino ones such as the Muon Collider and Neutrino factory, and for high-profile energy applications such as Accelerator Driven Subcritical Reactors (ADS) and Accelerator Transmutation of Waste for nuclear power and waste management. Work is focused almost exclusively on an SRF linac, as, to date, no re-circulating accelerator can attain the 10-20 MW capability necessary for the nuclear applications. Recently, the concept of isochronous orbits has been explored and developed for nonscaling FFAGs using powerful new methodologies in FFAG accelerator design. Work is progressing on a stable, high-intensity, 1 GeV isochronous FFAG. Initial specifications of novel magnets with the nonlinear radial fields required to support isochronous operation are also reported here.

Johnstone C.; Meot, F.; Snopok, P.; Weng, W.

2012-05-20T23:59:59.000Z

337

Thermally-induced expansion in the 8 GeV/c ? ? + 197 Au reaction.  

E-Print Network (OSTI)

Fragment kinetic energy spectra for reactions induced by 8.0 GeV/c ? ? beams incident on a 197 Au target have been analyzed in order to deduce the possible existence and influence of thermal expansion. The average fragment kinetic energies are observed to increase systematically with fragment charge and to be nearly independent of excitation energy. Comparison of the data with statistical multifragmentation models indicates the onset of extra collective thermal expansion near an excitation energy of E*/A ? 5 MeV. However, this effect is weak relative to the radial expansion observed in heavy-ion-induced reactions, consistent with the interpretation that the latter expansion may be driven primarily by dynamical effects such as compression/decompression. The origin of the multifragmentation process [1], and its link to a nuclear liquid-gas phase

T. Lefort; L. Beaulieu; A. Botvina; D. Dur; K. Kwiatkowski; W. -c. Hsi; B. Back; H. Breuer; S. Gushue; R. G. Korteling; R. Laforest

1999-01-01T23:59:59.000Z

338

Production and Testing Experience with the SRF Cavities for the CEBAF 12 GeV Upgrade  

Science Conference Proceedings (OSTI)

The CEBAF recirculating CW electron linear accelerator at Jefferson Lab is presently undergoing a major upgrade to 12 GeV. This project includes the fabrication, preparation, and testing of 80 new 7-cell SRF cavities, followed by their incorporation into ten new cryomodules for subsequent testing and installation. In order to maximize the cavity Q over the full operable dynamic range in CEBAF (as high as 25 MV/m), the decision was taken to apply a streamlined preparation process that includes a final light temperature-controlled electropolish of the rf surface over the vendor-provided bulk BCP etch. Cavity processing work began at JLab in September 2010 and will continue through December 2011. The excellent performance results are exceeding project requirements and indicate a fabrication and preparation process that is stable and well controlled. The cavity production and performance experience to date will be summarized and lessons learned reported to the community.

A. Burrill, G.K. Davis, F. Marhauser, C.E. Reece, A.V. Reilly, M. Stirbet

2011-09-01T23:59:59.000Z

339

Influence of encapsulation temperature on Ge:P {delta}-doped layers  

Science Conference Proceedings (OSTI)

We present a systematic study of the influence of the encapsulation temperature on dopant confinement and electrical properties of Ge:P {delta}-doped layers. For increasing growth temperature we observe an enhancement of the electrical properties accompanied by an increased segregation of the phosphorous donors, resulting in a slight broadening of the {delta} layer. We demonstrate that a step-flow growth achieved at {approx}530 deg. C provides the best compromise between high crystal quality and minimal dopant redistribution, with an electron mobility {approx}128 cm{sup 2}/Vs at a carrier density 1.3x10{sup 14} cm{sup -2}, and a 4.2 K phase coherence length of {approx}180 nm.

Scappucci, G.; Simmons, M. Y. [School of Physics and Australian Research Council Centre of Excellence for Quantum Computer Technology, University of New South Wales, Sydney, New South Wales 2052 (Australia); Capellini, G. [Dipartimento di Fisica, Universita di Roma Tre, Via della Vasca Navale 84, 00146 Roma (Italy)

2009-12-15T23:59:59.000Z

340

Categorical Exclusion Determination Form Proposed Action Title: (0473-1579) GE Global Research -  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

partment of n rgy partment of n rgy Categorical Exclusion Determination Form Proposed Action Title: (0473-1579) GE Global Research - Nanoclay-reinforced Ethylene-Propylene-Rubber for Low Cost HVDC Cabling Program or Field Office: Advanced Research Projects Agency - Energy LocationCs) (City/County/State): Niskayuna, NY Proposed Action Description: Funding will support development of a low cost, extrudable, nanoclay-reinforced ethylene-propylene-rubber (EPR) for making high voltage direct current (HVDC) cable. Proposed work will consist of (1) indoor, laboratory-based synthesis, characterization, and testing of nanoclay-reinforced EPR and (2) computer- based modeling of the performance characteristics and production cost of the nanoclay-reinforced EPR HVDC cable at full scale.

Note: This page contains sample records for the topic "ge appliances ge" from the National Library of EnergyBeta (NLEBeta).
While these samples are representative of the content of NLEBeta,
they are not comprehensive nor are they the most current set.
We encourage you to perform a real-time search of NLEBeta
to obtain the most current and comprehensive results.


341

Preparation and Testing of the SRF Cavities for the CEBAF 12 GeV Upgrade  

SciTech Connect

Eighty new 7-cell, low-loss cell-shaped cavities are required for the CEBAF 12 GeV Upgrade project. In addition to ten pre-production units fabricated at JLab, the full set of commercially-produced cavities have been delivered. An efficient processing routine, which includes a controlled 30 micron electropolish, has been established to transform these cavities into qualified 8-cavity strings. This work began in 2010 and will run through the end of 2011. The realized cavity performance consistently exceeds project requirements and also the maximum useful gradient in CEBAF: 25 MV/m. We will describe the cavity processing and preparation protocols and summarize test results obtained to date.

Reilly, A. V.; Bass, T.; Burrill, A.; Davis, G. K.; Marhauser, F.; Reece, C. E.; Stirbet, M.

2011-07-01T23:59:59.000Z

342

Energy dependence of pi, p and pbar transverse momentum spectra for Au+Au collisions at sqrt sNN = 62.4 and 200 GeV  

Science Conference Proceedings (OSTI)

We study the energy dependence of the transverse momentum (pT) spectra for charged pions, protons and anti-protons for Au+Au collisions at sqrt sNN = 62.4 and 200 GeV. Data are presented at mid-rapidity (lbar y rbar 7 GeV/c) the modification is similar for both energies. The p/pi+ and pbar/pi- ratios for central collisions at sqrt sNN = 62.4 GeV peak at pT _~;; 2 GeV/c. In the pT range where recombination is expected to dominate, the p/pi+ ratios at 62.4 GeV are larger than at 200 GeV, while the pbar/pi- ratios are smaller. For pT> 2 GeV/c, the pbar/pi- ratios at the two beam energies are independent of pT and centrality indicating that the dependence of the pbar/pi- ratio on pT does not change between 62.4 and 200 GeV. These findings challenge various models incorporating jet quenching and/or constituent quark coalescence.

Ritter, H

2007-03-26T23:59:59.000Z

343

Strained Ge channel p-type metal-oxide-semiconductor field-effect transistors grown on Si???xGex/Si virtual substrates  

E-Print Network (OSTI)

We have fabricated strained Ge channel p-type metal-oxide-semiconductor field-effect transistors (p-MOSFETs) on Si??.??Ge??.?? virtual substrates. The poor interface between silicon dioxide (SiO??) and the Ge channel ...

Lee, Minjoo L.

344

Abstract--Selective epitaxial growth of crystalline Ge on Si in a standard ASM Epsilon 2000 CVD reactor is investigated for the  

E-Print Network (OSTI)

In a standard CVD reactor, Ge selective epitaxial growth on patterned Si substrates was developed in thickness. The epitaxy is performed in a standard ASM Epsilon 2000 chemical-vapor-deposition (CVD) reactor surface after Ge-growth make this an attractive and straightforward add-on to standard Si technology. #12

Technische Universiteit Delft

345

Depth Requirements for a Tonne-scale 76Ge Neutrinoless Double-beta Decay Experiment  

E-Print Network (OSTI)

Neutrinoless double-beta decay experiments can potentially determine the Majorana or Dirac nature of the neutrino, and aid in understanding the neutrino absolute mass scale and hierarchy. Future 76Ge-based searches target a half-life sensitivity of >10^27 y to explore the inverted neutrino mass hierarchy. Reaching this sensitivity will require a background rate of required to reach this background goal in a tonne-scale experiment with a compact (copper and lead) shield based on Monte Carlo calculations of cosmic-ray background rates. We find that, in light of the presently large uncertainties in these types of calculations, a site with an underground depth >~5200 mwe is required for a tonne-scale experiment with a compact shield similar to the planned 40-kg MAJORANA DEMONSTRATOR. The required overburden is highly dependent on the chosen shielding configuration and could be relaxed significantly if, for example, a liquid cryogen and water shield, or an active neutron shield were employed. Operation of the MAJORANA DEMONSTRATOR and GERDA detectors will serve to reduce the uncertainties on cosmic-ray background rates and will impact the choice of shielding style and location for a future tonne-scale experiment. 4/2013: The peer review process revealed that one of the veto rejection factors (the factor-of-4 described on p12) needs to be better established. Our reevaluation of this parameter to date has not yielded strong support for the value stated in the manuscript, and we require further study to develop a solid estimate. This further study will supersede the work described in this manuscript, and may or may not lead to the same conclusion regarding the ~>5200 mwe requirement for future tonne-scale 76Ge neutrinoless double beta decay experiments.

The MAJORANA Collaboration; E. Aguayo; F. T. Avignone III; H. O. Back; A. S. Barabash; M. Bergevin; F. E. Bertrand; M. Boswell; V. Brudanin; M. Busch; Y-D. Chan; C. D. Christofferson; J. I. Collar; D. C. Combs; R. J. Cooper; J. A. Detwiler; P. J. Doe; Yu. Efremenko; V. Egorov; H. Ejiri; S. R. Elliott; J. Esterline; J. E. Fast; N. Fields; P. Finnerty; F. M. Fraenkle; V. M. Gehman; G. K. Giovanetti; M. P. Green; V. E. Guiseppe; K. Gusey; A. L. Hallin; R. Hazama; R. Henning; A. Hime; E. W. Hoppe; M. Horton; S. Howard; M. A. Howe; R. A. Johnson; K. J. Keeter; M. E. Keillor; C. Keller; J. D. Kephart; M. F. Kidd; A. Knecht; O. Kochetov; S. I. Konovalov; R. T. Kouzes; B. D. LaFerriere; B. H. LaRoque; J. Leon; L. E. Leviner; J. C. Loach; S. MacMullin; M. G. Marino; R. D. Martin; D. -M. Mei; J. H. Merriman; M. L. Miller; L. Mizouni; M. Nomachi; J. L. Orrell; N. R. Overman; D. G. Phillips II; A. W. P. Poon; G. Perumpilly; G. Prior; D. C. Radford; K. Rielage; R. G. H. Robertson; M. C. Ronquest; A. G. Schubert; T. Shima; M. Shirchenko; K. J. Snavely; V. Sobolev; D. Steele; J. Strain; K. Thomas; V. Timkin; W. Tornow; I. Vanyushin; R. L. Varner; K. Vetter; K. Vorren; J. F. Wilkerson; B. A. Wolfe; E. Yakushev; A. R. Young; C. -H. Yu; V. Yumatov; C. Zhang

2011-09-19T23:59:59.000Z

346

Active magnetic refrigerants based on Gd-Si-Ge material and refrigeration apparatus and process  

DOE Patents (OSTI)

Active magnetic regenerator and method using Gd.sub.5 (Si.sub.x Ge.sub.1-x).sub.4, where x is equal to or less than 0.5, as a magnetic refrigerant that exhibits a reversible ferromagnetic/antiferromagnetic or ferromagnetic-II/ferromagnetic-I first order phase transition and extraordinary magneto-thermal properties, such as a giant magnetocaloric effect, that renders the refrigerant more efficient and useful than existing magnetic refrigerants for commercialization of magnetic regenerators. The reversible first order phase transition is tunable from approximately 30 K to approximately 290 K (near room temperature) and above by compositional adjustments. The active magnetic regenerator and method can function for refrigerating, air conditioning, and liquefying low temperature cryogens with significantly improved efficiency and operating temperature range from approximately 10 K to 300 K and above. Also an active magnetic regenerator and method using Gd.sub.5 (Si.sub.x Ge.sub.1-x).sub.4, where x is equal to or greater than 0.5, as a magnetic heater/refrigerant that exhibits a reversible ferromagnetic/paramagnetic second order phase transition with large magneto-thermal properties, such as a large magnetocaloric effect that permits the commercialization of a magnetic heat pump and/or refrigerant. This second order phase transition is tunable from approximately 280 K (near room temperature) to approximately 350 K by composition adjustments. The active magnetic regenerator and method can function for low level heating for climate control for buildings, homes and automobile, and chemical processing.

Gschneidner, Jr., Karl A. (Ames, IA); Pecharsky, Vitalij K. (Ames, IA)

1998-04-28T23:59:59.000Z

347

Active magnetic refrigerants based on Gd-Si-Ge material and refrigeration apparatus and process  

DOE Patents (OSTI)

Active magnetic regenerator and method using Gd{sub 5} (Si{sub x}Ge{sub 1{minus}x}){sub 4}, where x is equal to or less than 0.5, as a magnetic refrigerant that exhibits a reversible ferromagnetic/antiferromagnetic or ferromagnetic-II/ferromagnetic-I first order phase transition and extraordinary magneto-thermal properties, such as a giant magnetocaloric effect, that renders the refrigerant more efficient and useful than existing magnetic refrigerants for commercialization of magnetic regenerators. The reversible first order phase transition is tunable from approximately 30 K to approximately 290 K (near room temperature) and above by compositional adjustments. The active magnetic regenerator and method can function for refrigerating, air conditioning, and liquefying low temperature cryogens with significantly improved efficiency and operating temperature range from approximately 10 K to 300 K and above. Also an active magnetic regenerator and method using Gd{sub 5} (Si{sub x} Ge{sub 1{minus}x}){sub 4}, where x is equal to or greater than 0.5, as a magnetic heater/refrigerant that exhibits a reversible ferromagnetic/paramagnetic second order phase transition with large magneto-thermal properties, such as a large magnetocaloric effect that permits the commercialization of a magnetic heat pump and/or refrigerant. This second order phase transition is tunable from approximately 280 K (near room temperature) to approximately 350 K by composition adjustments. The active magnetic regenerator and method can function for low level heating for climate control for buildings, homes and automobile, and chemical processing. 27 figs.

Gschneidner, K.A. Jr.; Pecharsky, V.K.

1998-04-28T23:59:59.000Z

348

Modeling of 10 GeV-1 TeV laser-plasma accelerators using Lorentz booster simulations  

SciTech Connect

Modeling of laser-plasma wakefield accelerators in an optimal frame of reference [J.-L. Vay, Phys. Rev. Lett. 98 130405 (2007)] allows direct and e#14;fficient full-scale modeling of deeply depleted and beam loaded laser-plasma stages of 10 GeV-1 TeV (parameters not computationally accessible otherwise). This verifies the scaling of plasma accelerators to very high energies and accurately models the laser evolution and the accelerated electron beam transverse dynamics and energy spread. Over 4, 5 and 6 orders of magnitude speedup is achieved for the modeling of 10 GeV, 100 GeV and 1 TeV class stages, respectively. Agreement at the percentage level is demonstrated between simulations using different frames of reference for a 0.1 GeV class stage. Obtaining these speedups and levels of accuracy was permitted by solutions for handling data input (in particular particle and laser beams injection) and output in a relativistically boosted frame of reference, as well as mitigation of a high-frequency instability that otherwise limits effectiveness.

Vay, J.-L.; Geddes, C.G.R.; Esarey, E.; Esarey, E.; Leemans, W.P.; Cormier-Michel, E.; Grote, D.P.

2011-12-01T23:59:59.000Z

349

Shape transitions and island nucleation for Si/Ge molecular beam epitaxy on stripe-patterned Si (001) substrate  

Science Conference Proceedings (OSTI)

Si and Ge growth on the stripe patterned Si (001) substrates is studied using scanning tunneling microscopy. During Si buffer growth, the stripe morphology rapidly evolves from multifaceted ''U'' to ''V''-shaped forms. This involves successive transitions between different low energy (11n) side facets, where n continuously decreases from n=3 to 20. Ge growth on such stripes induces the formation of a pronounced side wall ripple structure when the Ge thickness exceeds three monolayers. This ripple structure consists of alternating (105) microfacets oriented perpendicularly to the stripes. Depending of the side wall geometry, Ge nanoislands subsequently nucleate either on the side walls or at the bottom of grooves. The latter only occurs for ''V''-shaped stripes, where the side wall ripples extend all the way from the top to the bottom of the grooves, allowing efficient downward mass transport. For multifaceted ''U'' stripes, the side wall ripples are interrupted by steeper side wall segments such that mounds and subsequently, pyramids and domes grow on the side walls instead of at the bottom of the grooves. The island shapes strongly depend on their position on the pattern topography, which also affects the critical coverage for island nucleation as well as for the transition from pyramids to domes. The mechanisms for nucleation at different positions are clarified by detailed analysis and the role of kinetic as well as energetic factors identified.

Sanduijav, B.; Chen, G.; Springholz, G. [Institut fuer Halbleiter- und Festkoerperphysik, Johannes Kepler University, A-4040 Linz (Austria); Matei, D. [Institut fuer Halbleiter- und Festkoerperphysik, Johannes Kepler University, A-4040 Linz (Austria); National Institute for Laser, Plasma and Radiation Physics, RO-077125 Bucharest (Romania)

2009-09-15T23:59:59.000Z

350

Inclusive meson production in 3.5 GeV pp collisions studied with the HADES spectrometer  

Science Conference Proceedings (OSTI)

We present the inclusive di?electron invariant?mass spectrum from p + p interactions at 3.5 GeV kinetic beam energy. It is a very important reference for the study of vector meson production off the nucleus

Anar Rustamov; The HADES Collaboration

2010-01-01T23:59:59.000Z

351

Studies of nucleon-gold collisions at 200 GeV per nucleon pair using tagged d+Au interactions  

E-Print Network (OSTI)

The spectra of charged hadrons produced near mid-rapidity in d+Au, p+Au and n+Au collisions at - = 200 GeV are presented as a function of transverse momentum and centrality. These measurements were performed using the ...

Reed, Corey (Corey James)

2006-01-01T23:59:59.000Z

352

Di-electron spectrum at mid-rapidity in p+p collisions at ?s=200 GeV  

E-Print Network (OSTI)

We report on the mid-rapidity mass spectrum of di-electrons and cross sections of pseudoscalar and vector mesons via e[superscript +]e[superscript ?] decays, from ?s=200 GeV p+p collisions, measured by the large-acceptance ...

Balewski, Jan T.

353

Third harmonic flow of charged particles in Au + Au collisions at ?s[subscript NN]=200GeV  

E-Print Network (OSTI)

We report measurements of the third harmonic coefficient of the azimuthal anisotropy, v[subscript 3], known as triangular flow. The analysis is for charged particles in Au+Au collisions at ?s[subscript NN]=200 GeV, based ...

Betancourt, M. J.

354

Directed flow in Au+Au collisions at $\\sqrt{s_{_{NN}}}$ =62.4 GeV  

E-Print Network (OSTI)

We present the directed flow ($v_1$) measured in Au+Au collisions at $\\sqrt{s_{_{NN}}}$ = 62.4 GeV in the mid-pseudorapidity region $|\\eta|directed flow is in the direction opposite to that of fragmentation neutrons.

STAR Collaboration; J. Adams

2005-10-17T23:59:59.000Z

355

Muon g - 2 anomaly and 125 GeV Higgs: Extra vector-like quark and LHC prospects  

Science Conference Proceedings (OSTI)

The ATLAS and CMS collaborations recently reported indication of a Higgs boson around 125GeV. If we add extra vector-like quarks to the MSSM, such a relatively heavy Higgs can be naturally realized in the GMSB framework, simultaneously explaining the muon g - 2 anomaly. I will discuss LHC prospect of this attractive model.

Iwamoto, Sho [Department of Physics, University of Tokyo, Tokyo 113-0033 (Japan)

2012-07-27T23:59:59.000Z

356

Ming Jiang and Ge Wang: Recent Advances in Iterative Algorithms Page 1 of 13 Development of Iterative Algorithms for Image  

E-Print Network (OSTI)

of Radiology University of Iowa Iowa City, IA 52242, USA ge-wang@ieee.org http on the initial guesses, and so on. In addition, heuristic arguments are given for the SART and EM algorithms of Radiology University of Iowa 200 Hawkins Drive Iowa City, Iowa 52242, USA (P) (319) 356-8376 (F) (319) 356

Jiang, Ming

357

Structure of Clean Ge(1 1 0) and Effects of Low Coverage Ag Adsorption C. H. Mullet and S. Chiang  

E-Print Network (OSTI)

1 Structure of Clean Ge(1 1 0) and Effects of Low Coverage Ag Adsorption C. H. Mullet and S. Chiang, 2000), p. 296. [18] C. L. H. Devlin, D. N. Futaba, A. Loui, J. D. Shine, and S. Chiang, Mat Sci Eng B

Chiang, Shirley

358

Light neutralino dark matter in light Higgs scenario related with the CoGeNT and DAMA/LIBRA results  

E-Print Network (OSTI)

Recently, the CoGeNT collaboration reported the WIMP candidate signal events exceeding the known backgrounds where the light WIMP with large cross section is supported. Motivated by this issue, we analyze a light neutralino dark matter scenario with a very light CP-even Higgs mediation in the elastic scattering process, which provides the mass and direct detection cross section to explain the CoGeNT result. To be compatible with the result of other experiments such as LEP and B-factories, the light CP-even Higgs is favored to be in 9 to 10 GeV. Such a scenario can be realized in the "Beyond the MSSM" context. The relic abundance consistent with the WMAP result can be obtained when twice of neutralino mass is close to the light Higgs mass via the resonance enhancement of the annihilation cross section. As a result, the neutralino mass is predicted to be at around 5 to 6 GeV.

Seodong Shin

2010-11-29T23:59:59.000Z

359

Ca{sub 2}Pd{sub 3}Ge, a new fully ordered ternary Laves phase structure  

SciTech Connect

The title compound, Ca{sub 2}Pd{sub 3}Ge, was prepared as a part of a systematic investigation of the Ca-Pd-Ge ternary phase diagram. The structure was determined and refined from single-crystal X-ray diffraction data. It is a new fully ordered ternary Laves phase with the space group R-3m, Z=3, a=5.6191 (5) A, c=12.1674 (7) A, wR{sub 2}=0.054 (all data) and is isostructural to Mg{sub 2}Ni{sub 3}Si (Noreus et al., 1985 [17]) but due to the larger size of all elements in Ca{sub 2}Pd{sub 3}Ge, the cell axes are approximately 10% longer. The compound may formally be considered as a Zintl compound, with [Pd{sub 3}Ge]{sup 4-} forming a poly-anionic network and divalent Ca cations located in truncated tetrahedral interstices. The electronic structure and chemical bonding of Ca{sub 2}Pd{sub 3}Ge is discussed in terms of LMTO band structure calculations and compared with CaPd{sub 2} (MgCu{sub 2}-type). - Graphical abstract: The title compound, Ca{sub 2}Pd{sub 3}Ge is a new fully ordered ternary Laves phase which may formally be considered as a Zintl compound, with [Pd{sub 3}Ge]{sup 4-} forming a poly-anionic network and divalent Ca cations located in truncated tetrahedral interstices. The structure is composed of Kagome net layers, consisting of Pd atoms only, which are stacked in an ABC sequence. Band structure calculations show that the Fermi level is located at a local minimum of the DOS (pseudo-gap) indicating that the charge is roughly optimized in the structure. Highlights: Black-Right-Pointing-Pointer Site specific segregation in a Laves phase that is also a Zintl phase. Black-Right-Pointing-Pointer Pseudo-gap at the Fermi level in a Laves phase. Black-Right-Pointing-Pointer Distorted Frank-Kasper polyhedron.

Doverbratt, Isa, E-mail: isa.doverbratt@polymat.lth.se [Centre for Analysis and Synthesis, Lund University, P.O. Box 124, 22100 Lund (Sweden); Ponou, Simeon; Lidin, Sven [Centre for Analysis and Synthesis, Lund University, P.O. Box 124, 22100 Lund (Sweden)

2013-01-15T23:59:59.000Z

360

The Nature of the Distinctive Microscopic Features in R5(SixGe1-x)4 Magnetic Refrigeration Materials  

Science Conference Proceedings (OSTI)

Magnetic refrigeration is a promising technology that offers a potential for high energy efficiency. The giant magnetocaloric effect of the R{sub 5}(Si{sub x}, Ge{sub 1-x}){sub 4} alloys (where R=rare-earth and O {le} x {le} 1), which was discovered in 1997, make them perfect candidates for magnetic refrigeration applications. In this study the microstructures of Gd{sub 5}(Si{sub x}Ge{sub 1-x}){sub 4} alloys have been characterized using electron microscopy techniques, with the focus being on distinctive linear features first examined in 1999. These linear features have been observed in R{sub 5}(Si{sub x}, Ge{sub 1-x}){sub 4} alloys prepared from different rare-earths (Gd, Tb, Dy and Er) with different crystal structures (Gd{sub 5}Si{sub 4}-type orthorhombic, monoclinic and Gd{sub 5}Ge{sub 4}-type orthorhombic). Systematic scanning electron microscope studies revealed that these linear features are actually thin-plates, which grow along specific directions in the matrix material. The crystal structure of the thin-plates has been determined as hexagonal with lattice parameters a=b=8.53 {angstrom} and c=6.40 {angstrom} using selected area diffraction (SAD). Energy dispersive spectroscopy analysis, carried out in both scanning and transmission electron microscopes, showed that the features have a composition approximating to R{sub 5}(Si{sub x},Ge{sub 1-x}){sub 3}.phase. Orientation relationship between the matrix and the thin-plates has been calculated as [- 1010](1-211){sub p}//[010](10-2){sub m}. The growth direction of the thin plates are calculated as (22 0 19) and (-22 0 19) by applying the Ag approach of Zhang and Purdy to the SAD patterns of this system. High Resolution TEM images of the Gd{sub 5}Ge{sub 4} were used to study the crystallographic relationship. A terrace-ledge structure was observed at the interface and a 7{sup o} rotation of the reciprocal lattices with respect to each other, consistent with the determined orientation relationship, was noted. Both observations are consistent with the stated hypothesis that the growth direction of the thin-plates is parallel to an invariant line direction. Based on the terrace-ledge structure of the thin-plate interface a displacive-diffusional growth mechanism has been proposed to explain the rapid formation of the R{sub 5}(Si{sub x},Ge{sub 1-x}){sub 3} plates.

Ozan Ugurlu

2006-05-01T23:59:59.000Z

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361

Multi-junction, monolithic solar cell using low-band-gap materials lattice matched to GaAs or Ge  

DOE Patents (OSTI)

A multi-junction, monolithic, photovoltaic solar cell device is provided for converting solar radiation to photocurrent and photovoltage with improved efficiency. The solar cell device comprises a plurality of semiconductor cells, i.e., active p/n junctions, connected in tandem and deposited on a substrate fabricated from GaAs or Ge. To increase efficiency, each semiconductor cell is fabricated from a crystalline material with a lattice constant substantially equivalent to the lattice constant of the substrate material. Additionally, the semiconductor cells are selected with appropriate band gaps to efficiently create photovoltage from a larger portion of the solar spectrum. In this regard, one semiconductor cell in each embodiment of the solar cell device has a band gap between that of Ge and GaAs. To achieve desired band gaps and lattice constants, the semiconductor cells may be fabricated from a number of materials including Ge, GaInP, GaAs, GaInAsP, GaInAsN, GaAsGe, BGaInAs, (GaAs)Ge, CuInSSe, CuAsSSe, and GaInAsNP. To further increase efficiency, the thickness of each semiconductor cell is controlled to match the photocurrent generated in each cell. To facilitate photocurrent flow, a plurality of tunnel junctions of low-resistivity material are included between each adjacent semiconductor cell. The conductivity or direction of photocurrent in the solar cell device may be selected by controlling the specific p-type or n-type characteristics for each active junction.

Olson, Jerry M. (Lakewood, CO); Kurtz, Sarah R. (Golden, CO); Friedman, Daniel J. (Lakewood, CO)

2001-01-01T23:59:59.000Z

362

Crystal structure and chemical bonding of novel Li-containing polar intermetallic compound La{sub 11}Li{sub 12}Ge{sub 16}  

SciTech Connect

A novel Li-containing polar intermetallic compound La{sub 11}Li{sub 12}Ge{sub 16} has been synthesized using the high-temperature reaction method and characterized by both powder and single-crystal X-ray diffractions. The title compound crystallized in the orthorhombic crystal system (space group Immm, Z=2, Pearson symbol oI78) with fifteen crystallographically unique atomic positions in the asymmetric unit, and the lattice parameters are refined as a=4.5244(4) A, b=6.9932(6) A, and c=53.043(5) A. The complex crystal structure of the title compound can be described as a 2:1 intergrowth of two closely related compounds: La{sub 2}Li{sub 2}Ge{sub 3} (Ce{sub 2}Li{sub 2}Ge{sub 3}-type) and La{sub 3}Li{sub 4}Ge{sub 4} (Zr{sub 3}Cu{sub 4}Si{sub 4}-type) acting like 'building-blocks' along the c-axis. Six La sites are categorized into three distinct types based on the local coordination environment showing the coordination numbers of 12-14. Three unique Li sites are placed in the centers of local tetrahedra formed by four Ge atoms which eventually construct Ge{sub 2} dimers or 1-dimensional cis-/trans-Ge chains. Theoretical investigations using the tight-binding linear muffin-tin orbital (LMTO) method provide rationales for an improved structural stability and for unique local coordination geometries established by anionic elements including [LiGe{sub 4}] tetrahedra, cis-/trans-Ge chain and Ge{sub 2} dimers. - Graphical abstract: Reported is a novel ternary Li-containing polar intermetallic compound La{sub 11}Li{sub 12}Ge{sub 16}. The complex crystal structure can be viewed as a simple combination of two closely related known compounds acting as 'building-blocks', La{sub 2}Li{sub 2}G{sub 3} and La{sub 3}Li{sub 4}Ge{sub 4}, in a 2:1 stoichiometric ratio. Highlights: Black-Right-Pointing-Pointer A novel Li-containing polar intermetallic compound La{sub 11}Li{sub 12}Ge{sub 16} was synthesized. Black-Right-Pointing-Pointer The complex crystal structure was easily explained as a combination of two known compounds. Black-Right-Pointing-Pointer Theoretical calculations indicated that the Fermi level was located near the pseudogap.

Jung, Yaho; Nam, Gnu; Jeon, Jieun; Kim, Youngjo [Department of Chemistry, Chungbuk National University, Cheongju, 410 Seungbong-ro Heungduk-gu Chungbuk 361-763 (Korea, Republic of)] [Department of Chemistry, Chungbuk National University, Cheongju, 410 Seungbong-ro Heungduk-gu Chungbuk 361-763 (Korea, Republic of); You, Tae-Soo, E-mail: tsyou@chungbuk.ac.kr [Department of Chemistry, Chungbuk National University, Cheongju, 410 Seungbong-ro Heungduk-gu Chungbuk 361-763 (Korea, Republic of)] [Department of Chemistry, Chungbuk National University, Cheongju, 410 Seungbong-ro Heungduk-gu Chungbuk 361-763 (Korea, Republic of)

2012-12-15T23:59:59.000Z

363

Phase transformation and crystallization kinetics of a-Ge/Cu bilayer for blue-ray recording under thermal annealing and pulsed laser irradiation  

SciTech Connect

Similar phase formation and crystallization behaviors have been observed in the a-Ge/Cu bilayer under thermal annealing and pulsed laser irradiation. The Cu{sub 3}Ge phase would form prior to the crystallization of a-Ge. The crystallization temperature and activation energy for crystallization of a-Ge were reduced to 310 deg. C and 2.75 eV, respectively, due to the fast Ge diffusion in the already formed germanide phases. The reaction exponent m of {approx}2.0 for the a-Ge/Cu bilayer corresponds to a crystallization process in which grain growth occurs with nucleation, and the nucleation rate decreases with the progress of the grain growth process. Under pulsed laser irradiation, the maximum data-transfer-rates of 44, 56, 74, and 112 Mbit/s can be achieved in the write-once blue-ray disk at the recording powers of 3, 4, 5, and 6 mW, respectively. The a-Ge/Cu bilayer also demonstrated sufficient optical contrast and adequate absorptance for low power and high speed write-once blue-ray recording.

Her, Yung-Chiun; Tu, Wei-Ting; Tsai, Ming-Hsin [Department of Materials Science and Engineering, National Chung Hsing University, Taichung, Taiwan 40254 (China)

2012-02-15T23:59:59.000Z

364

Demonstration of New Technologies Required for the Treatment of Mixed Waste Contaminated with {ge}260 ppm Mercury  

Science Conference Proceedings (OSTI)

The Resource Conservation and Recovery Act (RCRA) defines several categories of mercury wastes, each of which has a defined technology or concentration-based treatment standard, or universal treatment standard (UTS). RCRA defines mercury hazardous wastes as any waste that has a TCLP value for mercury of 0.2 mg/L or greater. Three of these categories, all nonwastewaters, fall within the scope of this report on new technologies to treat mercury-contaminated wastes: wastes as elemental mercury; hazardous wastes with less than 260 mg/kg [parts per million (ppm)] mercury; and hazardous wastes with 260 ppm or more of mercury. While this report deals specifically with the last category--hazardous wastes with 260 ppm or more of mercury--the other two categories will be discussed briefly so that the full range of mercury treatment challenges can be understood. The treatment methods for these three categories are as follows: Waste as elemental mercury--RCRA identifies amalgamation (AMLGM) as the treatment standard for radioactive elemental mercury. However, radioactive mercury condensates from retorting (RMERC) processes also require amalgamation. In addition, incineration (IMERC) and RMERC processes that produce residues with >260 ppm of radioactive mercury contamination and that fail the RCRA toxicity characteristic leaching procedure (TCLP) limit for mercury (0.20 mg/L) require RMERC, followed by AMLGM of the condensate. Waste with TCLP mercury concentration of 0.20 mg/L be treated by a suitable method to meet the TCLP limit for mercury of 0.025 mg/L. RMERC residues must meet the TCLP value of {ge}0.20 mg/L, or be stabilized and meet the {ge}0.025 mg/L limit. Waste with {ge}260 ppm mercury--For hazardous wastes with mercury contaminant concentrations {ge}260 ppm and RCRA-regulated organic contaminants (other than incinerator residues), incineration or retorting (IMERC or RMERC) is the treatment standard. For wastes with mercury contaminant concentrations {ge}260 ppm that are inorganic, including incinerator and retort residues, RMERC is the treatment standard. Mercury hazardous waste contaminated with {ge}260 ppm mercury is the primary focus of this report.

Morris, M.I.

2002-02-06T23:59:59.000Z

365

Photon and Eta Production in p+Pb and p+C Collisions at sqrt{sNN} = 17.4 GeV  

E-Print Network (OSTI)

Measurements of direct photon production in p+Pb and p+C collisions at $\\sqrt{s_\\mathrm{NN}} = 17.4\\mathrm{GeV}$ are presented. Upper limits on the direct photon yield as a function of $p_\\mathrm{T}$ are derived and compared to the results for Pb+Pb collisions at $\\sqrt{s_\\mathrm{NN}} = 17.3$ GeV. The production of the $\\eta$ meson, which is an important input to the direct photon signal extraction, has been determined in the $\\eta \\rightarrow 2\\gamma$ channel for p+C collisions at $\\sqrt{s_\\mathrm{NN}} = 17.4\\mathrm{GeV}$.

WA98 Collaboration

2011-08-26T23:59:59.000Z

366

UNITED STATES DEPAR~FIENT OF THE INTERIOR GE O U X I CAL S URVEY  

Office of Legacy Management (LM)

DEPAR~FIENT OF THE INTERIOR DEPAR~FIENT OF THE INTERIOR GE O U X I CAL S URVEY F e d e r a l C e n t e r , D e n v e r , C o l o r a d o 80225 CHEMICAL AllD RADIOCHEMICAL ANALYSES OF WATER FROM STREAMS, RESERVOIRS, WELLS, AND SPRINGS I N THE R U L I S O N PROJECT AREA, GARFIELD AND MESA COUNTIES, COLORADO P r e p a r e d under C o n t r a c t A T ( 2 9 - 2 ) - 4 7 4 for the N e v a d a O p e r a t i o n s O f f i c e U . S . A t o m i c E n e r g y C o m m i s s i o n DISCLAIMER Portions of this document may be illegible in electronic image products. Images are produced from the best available original document. CONTENTS Page I n t r o d u c t i o n . . . . ,. . . . . . . . . . . . . . . . . . . . . . . 1 . . . . . . . . . . . . . . . . . . . . Methods of study and d a t a . 3 3 Samples of s u r f a c e w a t e r s . . . . . . . . . .. . . . . . . . . 8 . . . . . . . . . . . Samples of w e l l s , s p r i n g s and c i s t e r n s . S e l e c t e d r e f e r e n c e s . . . . . . . . . . . . . . . . . . . . . . . . . .

367

Environmental Assessment and (FONSI) Of The Proposed 7-GeV Advanced Photon Source  

Energy.gov (U.S. Department of Energy (DOE)) Indexed Site

and (FONSI) OF THE PROPOSED and (FONSI) OF THE PROPOSED 7-GeV ADVANCED PHOTON SOURCE Table of Contents LIST OF ABBREVIATIONS AND ACRONYMS ABSTRACT 1.0 INTRODUCTION 1.1 PURPOSE 1.2 THE APS PROJECT AT ANL 1.3 SUMMARY OF THE PROPOSED ACTION 1.4 NEED FOR ACTION 2.0 THE PROPOSED ACTION AND ALTERNATIVES 2.1 DESCRIPTION OF APS AND CONSTRUCTION ACTIVITIES (PROPOSED ACTION) 2.1.1 APS Facility Description 2.1.2 Utility Services 2.1.3 Gaseous Emissions, Liquid Effluents, and Wastes 2.1.4 Construction Activities 2.1.5 Decommissioning 2.2 ALTERNATIVES 2.2.1 No Action 2.2.2 Construction at Another ANL Site 3.0 THE AFFECTED ENVIRONMENT 3.1 SITE DESCRIPTION 3.2 CLIMATOLOGY AND AIR QUALITY 3.2.1 Climatology 3.2.2 Air Quality 3.3 DEMOGRAPHY AND SOCIOECONOMIC PROFILE 3.4 LAND USE 3.4.1 Site and Vicinity

368

Inferring the nature of the boson at 125-126 GeV  

E-Print Network (OSTI)

The presence of a bosonic resonance near 125 GeV has been firmly established at the Large Hadron Collider. Understanding the exact nature of this boson is a priority. The task now is to verify whether the boson is indeed the scalar Higgs as proposed in the Standard Model of particle physics, or something more esoteric as proposed in the plethora of extensions to the Standard Model. This requires a verification that the boson is a J^{PC}=0^{++} state with couplings precisely as predicted by the Standard Model. Since a non Standard Model boson can in some cases mimic the Standard Model Higgs in its couplings to gauge bosons, it is essential to rule out any anomalous behavior in its gauge couplings. We present a step by step methodology to determine the properties of this resonance without making any assumptions about its couplings. We present the analysis in terms of measurements that would require the minimum number of events. We show that by studying three uni-angular distributions and other readily measurable observables, one can unambiguously confirm whether the new boson is indeed the Higgs with J^{PC}=0^{++} and with couplings to Z bosons exactly as predicted in the Standard Model.

Tanmoy Modak; Dibyakrupa Sahoo; Rahul Sinha; Hai-Yang Cheng

2013-01-23T23:59:59.000Z

369

Measurements of Materials Shielding Properties with 1 GeV/nuc56Fe  

DOE Green Energy (OSTI)

The design of future spacecraft such as the Crew ExplorationVehicle must take into account the radiation shielding properties of boththe structural components as well as dedicated shielding materials. Sincemodest depths of shielding stop the vast majority of Solar EnergeticParticles (SEP), the greater challenge is posed by the need to shieldcrew from the Galactic Cosmic Rays (GCR), which include highly-chargedand highly-energetic particles. Here, we report on results from testsperformed with beams of 1 GeV/nuc 56Fe at the Brookhaven NationalLaboratory. A wide variety of targets, both elemental and composite, wereplaced in the particle beams, and the spectra of particles emerging fromthe targets were measured using a stack of silicon detectors. Results arepresented primarily in terms of dose reduction per g cm-2 of targetmaterial, and support the conclusions of an earlier calculation by Wilsonet al. showing that performance improves as the shield's mass numberdecreases, with hydrogen being by far the most effective. The data alsoshow that, as depth increases, the incremental benefit of addingshielding decreases, particularlyfor aluminum and other elements withhigher atomic mass numbers.

Zeitlin, Cary; Guetersloh, Stephen B.; Heilbronn, Lawrence H.; Miller, Jack

2006-05-15T23:59:59.000Z

370

Light Stops, Light Staus and the 125 GeV Higgs  

E-Print Network (OSTI)

The ATLAS and CMS experiments have recently announced the discovery of a Higgs-like resonance with mass close to 125 GeV. Overall, the data is consistent with a Standard Model (SM)-like Higgs boson. Such a particle may arise in the minimal supersymmetric extension of the SM with average stop masses of the order of the TeV scale and a sizable stop mixing parameter. In this article we discuss properties of the SM-like Higgs production and decay rates induced by the possible presence of light staus and light stops. Light staus can affect the decay rate of the Higgs into di-photons and, in the case of sizable left-right mixing, induce an enhancement in this production channel up to $\\sim$ 50% of the Standard Model rate. Light stops may induce sizable modifications of the Higgs gluon fusion production rate and correlated modifications to the Higgs diphoton decay. Departures from SM values of the bottom-quark and tau-lepton couplings to the Higgs can be obtained due to Higgs mixing effects triggered by light third ...

Carena, Marcela; Shah, Nausheen R; Wagner, Carlos E M; Wang, Lian-Tao

2013-01-01T23:59:59.000Z

371

Quark compound Bag model for NN scattering up to 1 GeV  

SciTech Connect

A Quark Compound Bag model has been constructed to describe NN s-wave scattering up to 1 GeV. The model contains a vertex interaction H/sub D/leftrightarrow/NN/ for describing the excitation of a confined six-quark Bag state, and a meson-exchange interaction obtained from modifying the phenomenological core of the Paris potential. Explicit formalisms and numerical results are presented to reveal the role of the Bag excitation mechanism in determining the relative wave function, P- and S-matrix of NN scattering. We explore the merit as well as the shortcoming of the Quark Compound Bag model developed by the ITEP group. It is shown that the parameters of the vertex interaction H/sub D/leftrightarrow/NN/ can be more rigorously determined from the data if the notation of the Chiral/Cloudy Bag model is used to allow the presence of the background meson-exchange interaction inside Bag excitation region. The application of the model in the study of quark degrees of freedom in nuclei is discussed. 41 refs., 6 figs., 3 tabs.

Fasano, C.; Lee, T.S.H.

1987-01-01T23:59:59.000Z

372

Reciprocal space analysis of the initial stages of strain relaxation in SiGe epilayers  

SciTech Connect

Metastable SiGe films were grown by MBE on Si (001) substrates and annealed to promote varying degrees of partial relaxation. X-ray diffraction reciprocal-space analysis was then used to monitor the structural evolution of the displacement fields of the dislocation array with increasing misfit density. The diffuse-x-ray-scattering patterns of the dislocated heterolayers were compared with lineal- misfit densities determined by defect etching, leading to the develop a geometric model which provides a framework for understanding the early-stage evolution of the displacement fields of the dislocation array, and which also explicitly links diffuse x-ray intensity to misfit density. At low misfit density, the diffuse intensity arises from two-dimensional displacement fields associated with single-nonoverlapping dislocations. As misfit density increases, the displacement fields of individual dislocations increasingly overlap producing three-dimensional displacements. The evolving diffuse intensity reflects the transition from 2-D to 3-D displacement fields. Finally, it is demonstrated that the diffuse x-ray intensity of the strained epilayer can be used to accurately measure lineal misfit- dislocation densities from 400 to 20,000 lines/cm.

Lee, S.R.; Floro, J.A.

1996-01-01T23:59:59.000Z

373

Macroparticle simulations of antiproton lifetime at 150 GeV in the te vatron  

SciTech Connect

In this paper we report on a systematic study of antiproton lifetime at the injection energy of 150 GeV in the Tevatron. Our parallel beam-beam model can handle both strong-strong and weak-strong beam-beam collisions with arbitrary beam-beam separation and beam distributions. In this study, we have only used the weak-strong capability due to the fact that the antiproton intensity is much smaller than the proton intensity. We have included all 72 long-range beam-beam collisions with a linear transfer map between adjacent collision points and taken into account linear chromaticity. The effects of antiproton emittance, beam-beam separation, proton intensity, and machine chromaticity have been investigated. Initial results show that the antiproton lifetime as a function of the proton intensity from the simulation is in good agreement with that from the experimental measurements. The antiproton lifetime can be significantly improved by increasing the beam separation and by reducing the antiproton emittance.

Qiang, Ji; Ryne, Robert D.; Sen, Tanaji; Xiao, Meiqin

2003-05-09T23:59:59.000Z

374

Development of improved p-type Si-20 at. % Ge by addition of fullerite  

DOE Green Energy (OSTI)

In a series of experiments designed to evaluate the possibility of lowering the lattice thermal conductivity of silicon-germanium alloys through the formation of an inert, intragrannular nanophase, a number of p-type Si-20 at. % Ge alloys, with a nominal doping level of 0.5 at. % boron, were prepared with varying amounts of fullerite, a mixture of 90% C{sub 60} + 10% C{sub 70} with a particle size of 0.7 nm. The alloys were synthesized by mechanical alloying (MA) and the fullerite was added at various stages of the preparation sequence. Compacts consolidated by hot pressing at temperatures of 1200 to 1265 C were found to be fully dense and homogeneous. Each compact was characterized by Hall effect at room temperature and also by electrical resistivity, Seebeck coefficient, and thermal diffusivity measurements to 1000 C. A reduction in thermal conductivity of up to 22% compared to standard p-type alloys was observed in samples containing 0.8 wt % additions. In this study, a maximum integrated average figure of merit, Z, between 300 and 1000 C of 0.65 {times} 10{sup {minus}3} {degree}C{sup {minus}1} was obtained, corresponding to 0.4 wt % addition of fullerite. Observation of selected samples by transmission electron microscopy revealed that the fullerite reacted with silicon to form nanophase SiC inclusions.

Cook, B.A.; Harringa, J.L.

1994-12-31T23:59:59.000Z

375

Strange particle production in p+p collisions at root s=200 GeV  

E-Print Network (OSTI)

We present strange particle spectra and yields measured at midrapidity in root s = 200 GeV proton-proton (p + p) collisions at the BNL Relativistic Heavy Ion Collider (RHIC). We find that the previously observed universal transverse mass (m(T) = root PT2 + m(2)) scaling of hadron production in p + p collisions seems to break down at higher m(T) and that there is a difference in the shape of the m(T) spectrum between baryons and mesons. We observe midrapidity antibaryon to baryon ratios near unity for Lambda and Xi baryons and no dependence of the ratio on transverse momentum, indicating that our data do not yet reach the quark-jet dominated region. We show the dependence of the mean transverse momentum on measured charged particle multiplicity and on particle mass and infer that these trends are consistent with gluon-jet dominated particle production. The data are compared with previous measurements made at the CERN Super Proton Synchrotron and Intersecting Storage Rings and in Fermilab experiments and with leading-order and next-to-leading-order string fragmentation model predictions. We infer from these comparisons that the spectral shapes and particle yields from p + p collisions at RHIC energies have large contributions from gluon jets rather than from quark jets.

Abelev, B. I.; Adams, J.; Aggarwal, M. M.; Ahammed, Z.; Amonett, J.; Anderson, B. D.; Anderson, M.; Arkhipkin, D.; Averichev, G. S.; Bai, Y.; Balewski, J.; Barannikova, O.; Barnby, L. S.; Baudot, J.; Bekele, S.; Belaga, V. V.; Bellingeri-Laurikainen, A.; Bellwied, R.; Benedosso, F.; Bhardwaj, S.; Bhasin, A.; Bhati, A. K.; Bichsel, H.; Bielcik, J.; Bielcikova, J.; Bland, L. C.; Blyth, S. -L; Bonner, B. E.; Botje, M.; Bouchet, J.; Brandin, A. V.; Bravar, A.; Burton, T. P.; Bystersky, M.; Cadman, R. V.; Cai, X. Z.; Caines, H.; Calderon de la Barca Sanchez,M.; Castillo, J.; Catu, O.; Cebra, D.; Chajecki, Z.; Chaloupka, P.; Chattopadhyay, S.; Chen, H. F.; Chen, J. H.; Cheng, J.; Cherney, M.; Chikanian, A.; Christie, W.; Coffin, J. P.; Cormier, T. M.; Cosentino, M. R.; Cramer, J. G.; Crawford, H. J.; Das, D.; Das, S.; Dash, S.; Daugherity, M.; de Moura, M. M.; Dedovich, T. G.; DePhillips, M.; Derevschikov, A. A.; Didenko, L.; Dietel, T.; Djawotho, P.; Dogra, S. M.; Dong, W. J.; Dong, X.; Draper, J. E.; Du, F.; Dunin, V. B.; Dunlop, J. C.; Dutta Mazumdar, M. R.; Eckardt, V.; Edwards, W. R.; Efimov, L. G.; Emelianov, V.; Engelage, J.; Eppley, G.; Erazmus, B.; Estienne, M.; Fachini, P.; Fatemi, R.; Fedorisin, J.; Filimonov, K.; Filip, P.; Finch, E.; Fine, V.; Fisyak, Y.; Fu, J.; Gagliardi, Carl A.; Gaillard, L.; Ganti, M. S.; Ghazikhanian, V.; Ghosh, P.; Gonzalez, J. E.; Gorbunov, Y. G.; Gos, H.; Grebenyuk, O.; Grosnick, D.; Guertin, S. M.; Guimaraes, K. S. F. F.; Gupta, A.; Gutierrez, T. D.; Haag, B.; Hallman, T. J.; Hamed, A.; Harris, J. W.; He, W.; Heinz, M.; Henry, T. W.; Hepplemann, S.; Hippolyte, B.; Hirsch, A.; Hjort, E.; Hoffman, A. M.; Hoffmann, G. W.; Horner, M. J.; Huang, H. Z.; Huang, S. L.; Hughes, E. W.; Humanic, T. J.; Igo, G.; Jacobs, P.; Jacobs, W. W.; Jakl, P.; Jia, F.; Jiang, H.; Jones, P. G.; Judd, E. G.; Kabana, S.; Kang, K.; Kapitan, J.; Kaplan, M.; Keane, D.; Kechechyan, A.; Khodyrev, V. Yu; Kim, B. C.; Kiryluk, J.; Kisiel, A.; Kislov, E. M.; Klein, S. R.; Kocoloski, A.; Koetke, D. D.; Kollegger, T.; Kopytine, M.; Kotchenda, L.; Kouchpil, V.; Kowalik, K. L.; Kramer, M.; Kravtsov, P.; Kravtsov, V. I.; Krueger, K.; Kuhn, C.; Kulikov, A. I.; Kumar, A.; Kuznetsov, A. A.; Lamont, M. A. C.; Landgraf, J. M.; Lange, S.; LaPointe, S.; Laue, F.; Lauret, J.; Lebedev, A.; Lednicky, R.; Lee, C. -H; Lehocka, S.; LeVine, M. J.; Li, C.; Li, Q.; Li, Y.; Lin, G.; Lin, X.; Lindenbaum, S. J.; Lisa, M. A.; Liu, F.; Liu, H.; Liu, J.; Liu, L.; Liu, Z.; Ljubicic, T.; Llope, W. J.; Long, H.; Longacre, R. S.; Love, W. A.; Lu, Y.; Ludlam, T.; Lynn, D.; Ma, G. L.; Ma, J. G.; Ma, Y. G.; Magestro, D.; Mahapatra, D. P.; Majka, R.; Mangotra, L. K.; Manweiler, R.; Margetis, S.; Markert, C.; Martin, L.; Matis, H. S.; Matulenko, Yu A.; McClain, C. J.; McShane, T. S.; Melnick, Yu; Meschanin, A.; Millane, J.; Miller, M. L.; Minaev, N. G.; Mioduszewski, Saskia; Mironov, C.; Mischke, A.; Mishra, D. K.; Mitchell, J.; Mohanty, B.; Molnar, L.; Moore, C. F.; Morozov, D. A.; Munhoz, M. G.; Nandi, B. K.; Nattrass, C.; Nayak, T. K.; Nelson, J. M.; Netrakanti, P. K.; Nogach, L. V.; Nurushev, S. B.; Odyniec, G.; Ogawa, A.; Okorokov, V.; Oldenburg, M.; Olson, D.; Pachr, M.; Pal, S. K.; Panebratsev, Y.; Panitkin, S. Y.; Pavlinov, A. I.; Pawlak, T.; Peitzmann, T.; Perevoztchikov, V.; Perkins, C.; Peryt, W.; Phatak, S. C.; Picha, R.; Planinic, M.; Pluta, J.; Poljak, N.; Porile, N.; Porter, J.; Poskanzer, A. M.; Potekhin, M.; Potrebenikova, E.; Potukuchi, B. V. K. S.; Prindle, D.; Pruneau, C.; Putschke, J.; Rakness, G.; Raniwala, R.; Raniwala, S.; Ray, R. L.; Razin, S. V.; Reinnarth, J.; Relyea, D.; Retiere, F.; Ridiger, A.; Ritter, H. G.; Roberts, J. B.; Rogachevskiy, O. V.; Romero, J. L.; Rose, A.; Roy, C.; Ruan, L.; Russcher, M. J.; Sahoo, R.; Sakuma, T.; Salur, S.; Sandweiss, J.; Sarsour, M.; Sazhin, P. S.; Schambach, J.; Scharenberg, R. P.; Schmitz, N.; Schweda, K.; Seger, J.; Selyuzhenkov, I.; Seyboth, P.; Shabetai, A.; Shahaliev, E.; Shao, M.; Sharma, M.; Shen, W. Q.; Shimanskiy, S. S.; Sichtermann, E.; Simon, F.; Singaraju, R. N.; Smirnov, N.; Snellings, R.; Sood, G.; Sorensen, P.; Sowinski, J.; Speltz, J.; Spinka, H. M.; Srivastava, B.; Stadnik, A.; Stanislaus, T. D. S.; Stock, R.; Stolpovsky, A.; Strikhanov, M.; Stringfellow, B.; Suaide, A. A. P.; Sugarbaker, E.; Sumbera, M.; Sun, Z.; Surrow, B.; Swanger, M.; Symons, T. J. M.; de Toledo, A. Szanto; Tai, A.; Takahashi, J.; Tang, A. H.; Tarnowsky, T.; Thein, D.; Thomas, J. H.; Timmins, A. R.; Timoshenko, S.; Tokarev, M.; Trainor, T. A.; Trentalange, S.; Tribble, Robert E.; Tsai, O. D.; Ulery, J.; Ullrich, T.; Underwood, D. G.; Van Buren, G.; van der Kolk, N.; van Leeuwen, M.; Vander Molen, A. M.; Varma, R.; Vasilevski, I. M.; Vasiliev, A. N.; Vernet, R.; Vigdor, S. E.

2007-01-01T23:59:59.000Z

376

Strange Particle Production in $p+p$ Collisions at $\\sqrt{s}$= 200GeV  

SciTech Connect

We present strange particle spectra and yields measured atmid-rapidity in sqrt text s=200 GeV proton-proton (p+p) collisions atRHIC. We find that the previously observed universal transverse mass(mathrm mT \\equiv\\sqrt mathrm p_T 2+\\mathrm m2) scaling of hadronproduction in p+p collisions seems to break down at higher \\mt and thatthere is a difference in the shape of the \\mt spectrum between baryonsand mesons. We observe mid-rapidity anti-baryon to baryon ratios nearunity for Lambda and Xi baryons and no dependence of the ratio ontransverse momentum, indicating that our data do not yet reach thequark-jet dominated region. We show the dependence of the mean transversemomentum (\\mpt) on measured charged particle multiplicity and on particlemass and infer that these trends are consistent with gluon-jet dominatedparticle production. The data are compared to previous measurements fromCERN-SPS, ISR and FNAL experiments and to Leading Order (LO) and Next toLeading order (NLO) string fragmentation model predictions. We infer fromthese comparisons that the spectral shapes and particle yields from $p+p$collisions at RHIC energies have large contributions from gluon jetsrather than quark jets.

Abelev, B.I.; Adams, J.; Aggarwal, M.M.; Ahammed, Z.; Amonett,J.; Anderson, B.D.; Anderson, M.; Arkhipkin, D.; Averichev, G.S.; Bai,Y.; Balewski, J.; Barannikova, O.; Barnby, L.S.; Baudot, J.; Bekele, S.; Belaga, V.V.; Bellingeri-Laurikainen, A.; Bellwied, R.; Benedosso, F.; Bhardwaj, S.; Bhasin, A.; Bhati, A.K.; Bichsel, H.; Bielcik, J.; Bielcikova, J.; Bland, L.C.; Blyth, S.-L.; Bonner, B.E.; Botje, M.; Bouchet, J.; Brandin, A.V.; Bravar, A.; Bystersky, M.; Cadman, R.V.; Cai,X.Z.; Caines, H.; Calderon de la Barca Sanchez, M.; Castillo, J.; Catu,O.; Cebra, D.; Chajecki, Z.; Chaloupka, P.; Chattopadhyay, S.; Chen,H.F.; Chen, J.H.; Cheng, J.; Cherney, M.; Chikanian, A.; Christie, W.; Coffin, J.P.; Cormier, T.M.; Cosentino, M.R.; Cramer, J.G.; Crawford,H.J.; Das, D.; Das, S.; Daugherity, M.; de Moura, M.M.; Dedovich, T.G.; DePhillips, M.; Derevschikov, A.A.; Didenko, L.; Dietel, T.; Djawotho,P.; Dogra, S.M.; Dong, W.J.; Dong, X.; Draper, J.E.; Du, F.; Dunin, V.B.; Dunlop, J.C.; Dutta Mazumdar, M.R.; Eckardt, V.; Edwards, W.R.; Efimov,L.G.; Emelianov, V.; Engelage, J.; Eppley, G.; Erazmus, B.; Estienne, M.; Fachini, P.; Fatemi, R.; Fedorisin, J.; Filimonov, K.; Filip, P.; Finch,E.; Fine, V.; Fisyak, Y.; Fu, J.; Gagliardi, C.A.; Gaillard, L.; Ganti,M.S.; Ghazikhanian, V.; Ghosh, P.; Gonzalez, J.S.; Gorbunov, Y.G.; Gos,H.; Grebenyuk, O.; Grosnick, D.; Guertin, S.M.; Guimaraes, K.S.F.F.; Guo,Y.; Gupta,N.; Gutierrez, T.D.; Haag, B.; Hallman, T.J.; Hamed, A.; Harris, J.W.; He, W.; Heinz, M.; Henry, T.W.; Hepplemann, S.; Hippolyte,B.; Hirsch, A.; Hjort, E.; Hoffman, A.M.; Hoffmann, G.W.; Horner, M.J.; Huang, H.Z.; Huang, S.L.; Hughes, E.W.; Humanic, T.J.; Igo, G.; Jacobs,P.; Jacobs, W.W.; Jakl, P.; Jia, F.; Jiang, H.; Jones, P.G.; Judd, E.G.; Kabana, S.; Kang, K.; Kapitan, J.; Kaplan, M.; Keane, D.; Kechechyan, A.; Khodyrev, V.Yu.; Kim, B.C.; Kiryluk, J.; Kisiel, A.; Kislov, E.M.; Klein,S.R.; Kocoloski, A.; Koetke, D.D.; et al.

2006-07-31T23:59:59.000Z

377

Microsoft Word - 41448_GE_Enabling & IT for RAM_Factsheet_Rev01_09-03.doc  

NLE Websites -- All DOE Office Websites (Extended Search)

GE Power Systems GE Power Systems Fact Sheet: Enabling & IT to Increase RAM for Advanced Powerplants DOE Contract No: DE-FC26-03NT41448 I. Project Participants: A. Prime Participant: General Electric Company, General Electric Power Systems B. Sub-Award Participants: General Electric Company, Global Research General Electric Company, Aircraft Engine General Electric Company, Energy and Environmental Research Corp. General Electric Company, Energy and Industrial Services, Inc. Georgia Institute of Technology Sandia National Laboratory II Project Description: A. Objective: Advanced analytical part lifing models, advanced sensors and controls, and highly integrated information technology (IT) platforms will be demonstrated in merchant coal/IGCC (Integrated Gasification Combined Cycle) gas turbine combined cycle

378

Measurement and modeling of infrared nonlinear absorption coefficients and laser-induced damage thresholds in Ge and GaSb  

SciTech Connect

Using a simultaneous fitting technique to extract nonlinear absorption coefficients from data at two pulse widths, we measure two-photon and free-carrier absorption coefficients for Ge and GaSb at 2.05 and 2.5 {mu}m for the first time, to our knowledge. Results agreed well with published theory. Single-shot damage thresholds were also measured at 2.5 {mu}m and agreed well with modeled thresholds using experimentally determined parameters including nonlinear absorption coefficients and temperature dependent linear absorption. The damage threshold for a single-layer Al{sub 2}O{sub 3} anti-reflective coating on Ge was 55% or 35% lower than the uncoated threshold for picosecond or nanosecond pulses, respectively.

Wagner, T. J.; Bohn, M. J.; Coutu, R. A. Jr. [Air Force Institute of Technology, Wright Patterson Air Force Base, Ohio 45433 (United States); Gonzalez, L. P.; Murray, J. M.; Guha, S. [Air Force Research Laboratory, Materials and Manufacturing Directorate, Wright Patterson Air Force Base, Ohio 45433 (United States); Schepler, K. L. [Air Force Research Laboratory, Sensors Directorate, Wright Patterson Air Force Base, Ohio 45433 (United States)

2010-10-15T23:59:59.000Z

379

$J/?$ polarization in p+p collisions at $\\sqrt{s}$ = 200 GeV in STAR  

E-Print Network (OSTI)

We report on a polarization measurement of inclusive $J/\\psi$ mesons in the di-electron decay channel at mid-rapidity at 2 $< p_T <$ 6 GeV/c in p+p collisions at $\\sqrt{s}$ = 200 GeV. Data were taken with the STAR detector at RHIC. The $J/\\psi$ polarization measurement should help to distinguish between the different models of the $J/\\psi$ production mechanism since they predict different $p_T$ dependences of the $J/\\psi$ polarization. In this analysis, $J/\\psi$ polarization is studied in the helicity frame. The polarization parameter $\\lambda_{\\theta}$ measured at RHIC becomes smaller towards high $p_T$, indicating more longitudinal $J/\\psi$ polarization as $p_T$ increases. The result is compared with predictions of presently available models.

STAR Collaboration; L. Adamczyk; J. K. Adkins; G. Agakishiev; M. M. Aggarwal; Z. Ahammed; I. Alekseev; J. Alford; C. D. Anson; A. Aparin; D. Arkhipkin; E. C. Aschenauer; G. S. Averichev; J. Balewski; A. Banerjee; Z. Barnovska; D. R. Beavis; R. Bellwied; A. Bhasin; A. K. Bhati; P. Bhattarai; H. Bichsel; J. Bielcik; J. Bielcikova; L. C. Bland; I. G. Bordyuzhin; W. Borowski; J. Bouchet; A. V. Brandin; S. G. Brovko; S. Bltmann; I. Bunzarov; T. P. Burton; J. Butterworth; H. Caines; M. Caldern de la Barca Snchez; D. Cebra; R. Cendejas; M. C. Cervantes; P. Chaloupka; Z. Chang; S. Chattopadhyay; H. F. Chen; J. H. Chen; L. Chen; J. Cheng; M. Cherney; A. Chikanian; W. Christie; J. Chwastowski; M. J. M. Codrington; R. Corliss; J. G. Cramer; H. J. Crawford; X. Cui; S. Das; A. Davila Leyva; L. C. De Silva; R. R. Debbe; T. G. Dedovich; J. Deng; A. A. Derevschikov; R. Derradi de Souza; S. Dhamija; B. di Ruzza; L. Didenko; C. Dilks; F. Ding; P. Djawotho; X. Dong; J. L. Drachenberg; J. E. Draper; C. M. Du; L. E. Dunkelberger; J. C. Dunlop; L. G. Efimov; J. Engelage; K. S. Engle; G. Eppley; L. Eun; O. Evdokimov; R. Fatemi; S. Fazio; J. Fedorisin; P. Filip; E. Finch; Y. Fisyak; C. E. Flores; C. A. Gagliardi; D. R. Gangadharan; D. Garand; F. Geurts; A. Gibson; M. Girard; S. Gliske; D. Grosnick; Y. Guo; A. Gupta; S. Gupta; W. Guryn; B. Haag; O. Hajkova; A. Hamed; L-X. Han; R. Haque; J. W. Harris; J. P. Hays-Wehle; S. Heppelmann; A. Hirsch; G. W. Hoffmann; D. J. Hofman; S. Horvat; B. Huang; H. Z. Huang; X. Huang; P. Huck; T. J. Humanic; G. Igo; W. W. Jacobs; H. Jang; E. G. Judd; S. Kabana; D. Kalinkin; K. Kang; K. Kauder; H. W. Ke; D. Keane; A. Kechechyan; A. Kesich; Z. H. Khan; D. P. Kikola; I. Kisel; A. Kisiel; D. D. Koetke; T. Kollegger; J. Konzer; I. Koralt; W. Korsch; L. Kotchenda; P. Kravtsov; K. Krueger; I. Kulakov; L. Kumar; R. A. Kycia; M. A. C. Lamont; J. M. Landgraf; K. D. Landry; J. Lauret; A. Lebedev; R. Lednicky; J. H. Lee; W. Leight; M. J. LeVine; C. Li; W. Li; X. Li; X. Li; Y. Li; Z. M. Li; L. M. Lima; M. A. Lisa; F. Liu; T. Ljubicic; W. J. Llope; R. S. Longacre; X. Luo; G. L. Ma; Y. G. Ma; D. M. M. D. Madagodagettige Don; D. P. Mahapatra; R. Majka; S. Margetis; C. Markert; H. Masui; H. S. Matis; D. McDonald; T. S. McShane; N. G. Minaev; S. Mioduszewski; B. Mohanty; M. M. Mondal; D. A. Morozov; M. G. Munhoz; M. K. Mustafa; B. K. Nandi; Md. Nasim; T. K. Nayak; J. M. Nelson; L. V. Nogach; S. Y. Noh; J. Novak; S. B. Nurushev; G. Odyniec; A. Ogawa; K. Oh; A. Ohlson; V. Okorokov; E. W. Oldag; R. A. N. Oliveira; M. Pachr; B. S. Page; S. K. Pal; Y. X. Pan; Y. Pandit; Y. Panebratsev; T. Pawlak; B. Pawlik; H. Pei; C. Perkins; W. Peryt; P. Pile; M. Planinic; J. Pluta; D. Plyku; N. Poljak; J. Porter; A. M. Poskanzer; N. K. Pruthi; M. Przybycien; P. R. Pujahari; H. Qiu; A. Quintero; S. Ramachandran; R. Raniwala; S. Raniwala; R. L. Ray; C. K. Riley; H. G. Ritter; J. B. Roberts; O. V. Rogachevskiy; J. L. Romero; J. F. Ross; A. Roy; L. Ruan; J. Rusnak; N. R. Sahoo; P. K. Sahu; I. Sakrejda; S. Salur; A. Sandacz; J. Sandweiss; E. Sangaline; A. Sarkar; J. Schambach; R. P. Scharenberg; A. M. Schmah; W. B. Schmidke; N. Schmitz; J. Seger; P. Seyboth; N. Shah; E. Shahaliev; P. V. Shanmuganathan; M. Shao; B. Sharma; W. Q. Shen; S. S. Shi; Q. Y. Shou; E. P. Sichtermann; R. N. Singaraju; M. J. Skoby; D. Smirnov; N. Smirnov; D. Solanki; P. Sorensen; U. G. deSouza; H. M. Spinka; B. Srivastava; T. D. S. Stanislaus; J. R. Stevens; R. Stock; M. Strikhanov; B. Stringfellow; A. A. P. Suaide; M. Sumbera; X. Sun; X. M. Sun; Y. Sun; Z. Sun; B. Surrow; D. N. Svirida; T. J. M. Symons; A. Szanto de Toledo; J. Takahashi; A. H. Tang; Z. Tang; T. Tarnowsky; J. H. Thomas; A. R. Timmins; D. Tlusty; M. Tokarev; S. Trentalange; R. E. Tribble; P. Tribedy; B. A. Trzeciak; O. D. Tsai; J. Turnau; T. Ullrich; D. G. Underwood; G. Van Buren; G. van Nieuwenhuizen; J. A. Vanfossen, Jr.; R. Varma; G. M. S. Vasconcelos; A. N. Vasiliev; R. Vertesi; F. Videbk; Y. P. Viyogi; S. Vokal; A. Vossen; M. Wada; M. Walker; F. Wang; G. Wang; H. Wang; J. S. Wang; X. L. Wang; Y. Wang; Y. Wang; G. Webb; J. C. Webb; G. D. Westfall; H. Wieman; S. W. Wissink; R. Witt; Y. F. Wu; Z. Xiao; W. Xie; K. Xin; H. Xu; N. Xu; Q. H. Xu; Y. Xu; Z. Xu; W. Yan; C. Yang; Y. Yang; Y. Yang; Z. Ye; P. Yepes; L. Yi; K. Yip; I-K. Yoo; Y. Zawisza; H. Zbroszczyk; W. Zha; J. B. Zhang; J. L. Zhang; S. Zhang; X. P. Zhang; Y. Zhang; Z. P. Zhang; F. Zhao; J. Zhao; C. Zhong; X. Zhu; Y. H. Zhu; Y. Zoulkarneeva; M. Zyzak

2013-11-07T23:59:59.000Z

380

Single/Few Bunch Space Charge Effects at 8 GeV in the Fermilab Main Injector  

SciTech Connect

For Project X, it is planned to inject a beam of 3 10{sup 11} particles per bunch into the Main Injector. Therefore, at 8 GeV, there will be increased space charge tune shifts and an increased incoherent tune spread. In preparation for these higher intensity bunches exploratory studies have commenced looking at the transmission of different intensity bunches at different tunes. An experiment is described with results for bunch intensities between 20 and 300 10{sup 9} particles. To achieve the highest intensity bunches coalescing at 8 GeV is required, resulting in a longer bunch length. Comparisons show that similar transmission curves are obtained when the intensity and bunch length have increased by similar factors. This indicates the incoherent tune shifts are similar, as expected from theory. The results of these experiments will be used in conjugation with simulations to further study high intensity bunches in the Main Injector.

Scott, D.J.; Capista, D.; Kourbanis, I.; Seiya, K.; Yang, M.-J.; /Fermilab

2012-05-01T23:59:59.000Z

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381

Electronic Band Dispersion Of CeAg{sub 2}Ge{sub 2} Studied Using Angle Resolved Photoemission Spectroscopy  

Science Conference Proceedings (OSTI)

Angle resolved photoelectron spectroscopy has been used to determine the electronic band dispersion of CeAg{sub 2}Ge{sub 2} single crystal along the {Gamma}-Z direction. Normal emission photoelectron spectra for photon energy from 21 eV to 35 eV were used to obtain the band mapping. Four photoemission features are observed to show the dispersion. The experimental spectra have been interpreted with the help of calculations based on full potential linear augmented plane wave method using density functional theory. The bands that show dispersion along the {Gamma}-Z direction are mainly related to the Ce 4f states and the hybridized Ag 4d with Ge 4p states.

Banik, Soma; Chakrabarti, Aparna; Deb, S. K. [Raja Ramanna Centre for Advanced Technology, Indore 452013 (India); Jha, S. N. [Spectroscopy Division, Bhabha Atomic Research Center, Mumbai 400085 (India); Thamizhavel, A. [Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400005 (India)

2011-07-15T23:59:59.000Z

382

Scanning tunneling microscopy studies of the surfaces of a-Si:H and a-SiGe:H films  

SciTech Connect

The report contains a detailed description of the experimental complexities encountered in developing scanning tunneling microscope (STM) probing of atomic structure on the surface of freshly-grown hydrogenated-amorphous semiconductors. It also contains a speculative microscopic film-growth model that explains differences between the disorder in CVD grown a-Ge:H versus a-Si:H films. This model is derived from prior results obtained in the chemical analysis of GeH{sub 4} plasmas, combined with surface reaction and thermodynamic considerations. The neutral radical fragments of silane, disilane and germane dissociation in discharges, which dominate the vapor and film-growth reactions, have been deduced from detailed analysis of prior data and are reported. 4 refs., 7 figs.

Gallagher, A.; Ostrom, R.; Tannenbaum, D. (National Inst. of Standards and Technology, Boulder, CO (USA))

1991-06-01T23:59:59.000Z

383

First Measurements of the Longitudinal Bunch Profile at SLAC Using Coherent Smith-Purcell Radiation at 28GeV  

Science Conference Proceedings (OSTI)

Coherent Smith-Purcell radiation has been demonstrated as a technique for measuring the longitudinal profile of charged particles bunches in the low to intermediate energy range. However, with the advent of the International Linear Collider, the need has arisen for a non-invasive method of measuring the bunch profile at extremely high energies. Smith-Purcell radiation has been used for the first time in the multi-GeV regime to measure the longitudinal profile of the 28GeV SLAC beam. The experiment has both successfully determined the bunch length, and has also demonstrated its sensitivity to bunch profile changes. The challenges associated with this technique, and its prospects as a diagnostic tool are reported here.

Blackmore, V.; Doucas, G.; Ottewell, B.; Perry, C.; /Oxford U.; Kimmitt, M.F.; /Essex U.; Arnold, R.; Molloy, S.; Woods, M.; /SLAC

2011-11-02T23:59:59.000Z

384

Light Nuclides Produced in the Proton-Induced Spallation of 238U at 1 GeV  

E-Print Network (OSTI)

The production of light and intermediate-mass nuclides formed in the reaction 1H+238U at 1 GeV was measured at the Fragment Separator (FRS) at GSI, Darmstadt. The experiment was performed in inverse kinematics, shooting a 1 A GeV 238U beam on a thin liquid-hydrogen target. 254 isotopes of all elements in the range from Z=7 to Z=37 were unambiguously identified, and the velocity distributions of the produced nuclides were determined with high precision. The results show that the nuclides are produced in a very asymmetric binary decay of heavy nuclei originating from the spallation of uranium. All the features of the produced nuclides merge with the characteristics of the fission products as their mass increases.

M. V. Ricciardi; P. Armbruster; J. Benlliure; M. Bernas; A. Boudard; S. Czajkowski; T. Enqvist; A. Kelic; S. Leray; R. Legrain; B. Mustapha; J. Pereira; F. Rejmund; K. -H. Schmidt; C. Stephan; L. Tassan-Got; C. Volant; O. Yordanov

2005-08-24T23:59:59.000Z

385

In search of high performance anode materials for Mg batteries: computational studies of Mg in Ge, Si, and Sn  

E-Print Network (OSTI)

We present ab initio studies of structures, energetics, and diffusion properties of Mg in Si, Ge, and Sn diamond structures to evaluate their potential as insertion type anode materials for Mg batteries. We show that Si could provide the highest specific capacities (3817 mAh g-1) and the lowest average insertion voltage (~0.15 eV vs. Mg) for Mg storage. Nevertheless, due to its significant percent lattice expansion (~216%) and slow Mg diffusion, Sn and Ge are more attractive; both anodes have lower lattice expansions (~120 % and ~178 %, respectively) and diffusion barriers (~0.50 and ~0.70 eV, respectively for single-Mg diffusion) than Si. We show that Mg-Mg interactions at different stages of charging can decrease significantly the diffusion barrier compared to the single atom diffusion, by up to 0.55 eV.

Malyi, Oleksandr I; Manzhos, Sergei; 10.1016/j.jpowsour.2013.01.114

2013-01-01T23:59:59.000Z

386

Multi-GeV neutrinos due to neutro anti-neutron oscillation in Gamma-Ray Burst Fireballs  

E-Print Network (OSTI)

The long and short gamma-ray bursts are believed to be produced due to collapse of massive stars and merger of compact binaries respectively. All these objects are rich in neutron and the jet outflow from these objects must have a neutron component in it. By postulating the neutron anti-neutron oscillation in the gamma-ray burst fireball, we show that, 19-38 GeV neutrinos and anti-neutrinos can be produced due to annihilation of anti-neutrons with the background neutrons. These neutrinos and anti-neutrinos will be produced before the 5-10 GeV neutrinos due to dynamical decoupling of neutrons from the rest of the fireball. Observation of these neutrinos will shed more light on the nature of the GRB progenitors and also be a unique signature of physics beyond the standard model. A possible way of detecting these neutrinos in future is also discussed.

Sarira Sahu

2007-02-27T23:59:59.000Z

387

Post-Irradiation Examination of a Failed GE12 Fuel Rod with a Long Axial Split from Forsmark 1  

Science Conference Proceedings (OSTI)

The Electric Power Research Institutes (EPRIs) Fuel Reliability Program (FRP) is co-sponsoring research with Vattenfall to perform post-irradiation examination (PIE) research, initiated and supported by Vattenfall, and making the results available to all FRP members.This particular study looks at a GE12 fuel rod that operated in Forsmark 1 for five annual cycles. During the fifth cycle (Cycle 21), an indication of fuel rod failure was observed by increased off-gas activity. ...

2013-09-24T23:59:59.000Z

388

Particle distribution and nuclear stopping in Au-Au collisions at $\\sqrt{s_{NN}}$=200 GeV  

E-Print Network (OSTI)

The transverse momentum distribution of produced charged particles is investigated for gold-gold collisions at $\\sqrt{s_{NN}}=200$ GeV. A simple parameterization is suggested for the particle distribution based on the nuclear stopping effect. The model can fit very well both the transverse momentum distributions at different pseudo-rapidities and the pseudo-rapidity distributions at different centralities. The ratio of rapidity distributions for peripheral and central collisions is calculated and compared with the data.

L. L. Zhu; C. B. Yang

2006-05-18T23:59:59.000Z

389

Direct photons in d+Au collisions at s_(NN)**(1/2)=200GeV with STAR  

E-Print Network (OSTI)

Results are presented of an ongoing analysis of direct photon production in s_(NN)=200GeV deuteron-gold collisions with the STAR experiment at RHIC. A significant excess of direct photons is observed near mid-rapidity 0

STAR collaboration

2007-01-15T23:59:59.000Z

390

Centrality Dependence of Direct Photon Production in sqrt(s_NN) = 200 GeV Au+Au Collisions  

E-Print Network (OSTI)

The first measurement of direct photons in Au+Au collisions at sqrt(s_NN) = 200 GeV is presented. The direct photon signal is extracted as a function of the Au+Au collision centrality and compared to NLO pQCD calculations. The direct photon yield is shown to scale with the number of nucleon-nucleon collisions for all centralities.

PHENIX Collaboration; S. S. Adler

2005-03-07T23:59:59.000Z

391

Direct photon measurement in Au+Au collisions at $\\sqrt{s_{NN}}$=200GeV a t RHIC  

E-Print Network (OSTI)

Direct photon production in Au+Au collisions at $\\sqrt{s_{NN}}$=200 GeV has been measured. The result is compared to several theoretical calculations, and found that it is not inconsistent with ones including thermal radiation from QGP or jet-photon conversion process on top of a NLO pQCD expectation. The direct photon contribution in dilepton measurement is also evaluated.

Takao Sakaguchi

2006-01-03T23:59:59.000Z

392

Exotic Effects at the Charm Threshold and Other Novel Physics Topics at JLab-12 GeV  

Science Conference Proceedings (OSTI)

I briefly survey a number of novel hadron physics topics which can be investigated with the 12 GeV upgrade at J-Lab. The topics include new the formation of exotic heavy quark resonances accessible above the charm threshold, intrinsic charm and strangeness phenomena, the exclusive Sivers effect, hidden-color Fock states of nuclei, local two-photon interactions in deeply virtual Compton scattering, and non-universal antishadowing.

Brodsky, Stanley J.; /SLAC

2012-05-03T23:59:59.000Z

393

Advanced Gas Turbine Guidelines: Hot Gas Path Parts Condition and Remaining Life Assessment for GE 7FA in Baseload Operation  

Science Conference Proceedings (OSTI)

Based on two years experience operating four advanced gas turbines (AGT) General Electric MS 7221 FA at Martin CC of Florida Power & Light (FP&L), this guideline describes the operating and maintenance philosophy used for baseload AGT units and the integrity of the hot path components and their remaining life. The guideline will assist utilities operating the GE MS 7221FA class AGT plan inspections and comparisons with other units in this class.

1997-04-16T23:59:59.000Z

394

A search for GeV-TeV emission from Gamma-ray Bursts using the Milagro detector  

E-Print Network (OSTI)

A search for GeV-TeV emission from Gamma-ray Bursts using the Milagro detector p. M. Saz Parkinson of operation. Keywords: gamma-ray sources; gamma-ray bursts; astronomical observations gamma-ray; gamma-ray telescope; Milagro PACS: 95.55.Ka; 95.85.Pw; 98.70.Rz INTRODUCTION Gamma-ray bursts (GRBs) were detected up

California at Santa Cruz, University of

395

Distribution of aluminum and indium impurities in crystals of Ge-Si solid solutions grown from the melt  

Science Conference Proceedings (OSTI)

The problem regarding the distribution of aluminum and indium impurities in bulk crystals of solid solutions with a variable composition Ge{sub 1-x}Si{sub x} (0 {<=} x {<=} 0.3) is solved in order to establish regularities of the changes in the segregation coefficients of impurities with variations in the composition of the host lattice in the germanium-silicon system. Aluminum-and indium-doped crystals of Ge{sub 1-x}Si{sub x} (0 {<=} x {<=} 0.3) solid solutions with a silicon content decreasing along the crystallization axis are grown by a modified Bridgman method with the use of a silicon seed. The concentration distribution of impurities over the length of the crystals is determined from Hall measurements. It is demonstrated that the experimental data on the concentration distribution of impurities in the crystals are in good agreement with the results obtained from the theory according to which the equilibrium segregation coefficients of impurities vary linearly with a change in the composition of Ge-Si solid solution crystals.

Kyazimova, V. K. [National Academy of Sciences of Azerbaijan, Institute of Physics (Azerbaijan)], E-mail: zangi@physics.ab.az; Zeynalov, Z. M. [Ganja State University (Azerbaijan); Zakhrabekova, Z. M.; Azhdarov, G. Kh. [National Academy of Sciences of Azerbaijan, Institute of Physics (Azerbaijan)

2006-12-15T23:59:59.000Z

396

New Results from the HAPPEx Experiments at Q^2= 0.1 GeV/c^2  

SciTech Connect

The nucleon's strange electric and magnetic form factors G_E^s and G_M^s can be probed via parity-violating electron scattering. The HAPPEx collaboration has made new measurements of the parity-violating asymmetry A_PV in elastic scattering of 3 GeV electrons off hydrogen and 4He targets with = 6.0 degrees. For 4He the preliminary result is A_PV = (+6.43 +- 0.23 (stat) +- 0.22 (syst)) x 10^{-6}. For hydrogen the preliminary result isA_PV = (-1.60 +- 0.12 (stat) +- 0.05 (syst)) x 10^{-6}. From these values we extract G^s_E = 0.004 +- 0.014 +- 0.013at = 0.077 GeV/c^2, and G^s_E+ 0.09 G^s_M = 0.004 +- 0.011 +- 0.005at = 0.109 GeV/c^2, both consistent with zero, providing stringent new limits on the role of strange quarks in the vector structure of the nucleon.

David Armstrong

2006-05-16T23:59:59.000Z

397

Open Charm Yields in d+Au Collisions at sqrt(sNN) = 200 GeV  

Science Conference Proceedings (OSTI)

Mid-rapidity open charm spectra from direct reconstruction of D{sup 0}({bar D}{sup 0}) {yields} K{sup {-+}} {pi}{sup {+-}} in d+Au collisions and indirect electron/positron measurements via charm semileptonic decays in p+p and d+Au collisions at {radical}s{sub NN} = 200 GeV are reported. The D{sup 0}({bar D}{sup 0}) spectrum covers a transverse momentum (p{sub T}) range of 0.1 < p{sub T} < 3 GeV/c whereas the electron spectra cover a range of 1 < p{sub T} < 4 GeV/c. The electron spectra show approximate binary collision scaling between p+p and d+Au collisions. From these two independent analyses, the differential cross section per nucleon-nucleon binary interaction at mid-rapidity for open charm production from d+Au collisions at RHIC is d{sigma}{sub c{bar c}}{sup NN}/dy = 0.30 {+-} 0.04 (stat.) {+-} 0.09(syst.) mb. The results are compared to theoretical calculations. Implications for charmonium results in A+A collisions are discussed.

Adams, J.; Aggarwal, M.M.; Ahammed, Z.; Amonett, J.; Anderson, B.D.; Arkhipkin, D.; Averichev, G.S.; Badyal, S.K.; Bai, Y.; Balewski, J.; Barannikova, O.; Barnby, L.S.; Baudot, J.; Bekele, S.; Belaga, V.V.; Bellwied, R.; Berger, J.; Bezverkhny, B.I.; Bharadwaj, S.; Bhasin, A.; Bhati, A.K.; Bhatia, V.S.; Bichsel, H.; Billmeier, A.; Bland, L.C.; Blyth, C.O.; Bonner, B.E.; Botje, M.; Boucham, A.; Brandin, A.; Bravar, A.; Bystersky, M.; Cadman, R.V.; Cai, X.Z.; Caines, H.; Calderon de la Barca Sanchez, M.; Castillo, J.; Cebra, D.; Chajecki, Z.; Chaloupka, P.; Chattopadhyay, S.; Chen, H.F.; Chen, Y.; Cheng, J.; Cherney, M.; Chikanian, A.; Christie, W.; Coffin, J.P.; Cormier, T.M.; Cramer, J.G.; Crawford, H.J.; Das, D.; Das, S.; De Moura, M.M.; Derevschikov, A.A.; Didenko, L.; Dietel, T.; Dogra, S.M.; Dong, W.J.; Dong, X.; Draper, J.E.; Du, F.; Dubey, A.K.; Dunin, V.B.; Dunlop, J.C.; Dutta Mazumda, M.R.; Eckardt, V.; Edwards, W.R.; Efimov, L.G.; Emelianov, V.; Engelage, J.; Eppley, G.; Erazmus, B.; Estienne, M.; Fachini, P.; Faivre, J.; Fatemi, R.; Fedorisin, J.; Filimonov, K.; Filip, P.; Finch, E.; Fine, V.; Fisyak, Y.; Fomenko, K.; Fu, J.; Gagliardi, C.A.; Gaillard, L.; Gans, J.; Ganti, M.S.; Gaudichet, L.; Geurts, F.; Ghazikhanian, V.; Ghosh, P.; Gonzalez, J.F.; Grachov, O.; Grebenyuk, O.; Grosnick, D.; Guertin, S.M.; Guo, Y.; Gupta, A.; Gutierrez, T.D.; Hallman, T.J.; Hamed, A.; Hardtke, D.; Harris, J.W.; Heinz, M.; Henry, T.W.; Heppelmann, S.; Hippolyte, B.; Hirsch, A.; Hjort, E.; Hoffmann, G.W.; Huang, H.Z.; Huang, S.L.; Hughes, E.W.; Humanic, T.J.; Igo, G.; Ishihara, A.; Ivanshin, Yu.I.; Jacobs, P.; Jacobs, W.W.; Janik, M.; Jiang, H.; Jones, P.G.; Judd, E.G.; Kabana, S.; Kang, K.; Kaplan, M.; Keane, D.; Khodyrev, V.Yu.; Kiryluk, J.; Kisiel, A.; Kislov, E.M.; Klay, J.; Klein, S.R.; Koetke, D.D.; Kollegger, T.; Kopytine, S.M.; Kotchenda, L.; Kramer, M.; Kravtsov, P.; Kravtsov, V.I.; Krueger, K.; Kuhn, C.; Kulikov, A.I.; Kumar, A.; et al.

2005-01-07T23:59:59.000Z

398

Photon and neutral pion production in Au+Au collisions at {radical}s{sub NN} = 130 GeV  

Science Conference Proceedings (OSTI)

We report the first inclusive photon measurements about mid-rapidity (|y| conversions were reconstructed from electron and positron tracks measured with the Time Projection Chamber (TPC) of the STAR experiment. With this method, an energy resolution of {Delta}E/E {approx} 2% at 0.5 GeV has been achieved. Reconstructed photons have also been used to measure the transverse momentum (p{sub t}) spectra of {pi}{sup 0} mesons about mid-rapidity (|y| < 1) via the {pi}{sup 0} {yields} {gamma}{gamma} decay channel. The fractional contribution of the {pi}{sup 0} {yields} {gamma}{gamma} decay to the inclusive photon spectrum decreases by 20% {+-} 5% between p{sub t} = 1.65 GeV/c and p{sub t} = 2.4 GeV/c in the most central events, indicating that relative to {pi}{sup 0} {yields} {gamma}{gamma} decay the contribution of other photon sources is substantially increasing.

Adams, J.; Adler, C.; Aggarwal, M.M.; Ahammed, Z.; Amonett, J.; Anderson, B.D.; Anderson, M.; Arkhipkin, D.; Averichev, G.S.; Badyal, S.K.; Balewski, J.; Barannikova, O.; Barnby, L.S.; Baudot, J.; Bekele, S.; Belaga, V.V.; Bellwied, R.; Berger, J.; Bezverkhny, B.I.; Bhardwaj, S.; Bhaskar, P.; Bhati, A.K.; Bichsel, H.; Billmeier, A.; Bland, L.C.; Blyth, C.O.; Bonner, B. E.; Botje, M.; Boucham, A.; Brandin, A.; Bravar, A.; Cadman, R.V.; Cai, X.Z.; Caines, H.; Calderon de la Barca Sanchez, M.; Carroll, J.; Castillo, J.; Castro, M.; Cebra, D.; Chaloupka, P.; Chattopadhyay, S.; Chen, H.F.; Chen, Y.; Chernenko, S.P.; Cherney, M.; Chikanian, A.; Choi, B.; Christie, W.; Coffin, J.P.; Cormier, T.M.; Cramer, J.G.; Crawford, H.J.; Das, D.; Das, S.; Derevschikov, A.A.; Didenko, L.; Dietel, T.; Dong, X.; Draper, J.E.; Du, F.; Dubey, A.K.; Dunin, V.B.; Dunlop, J.C.; Dutta Majumdar, M.R.; Eckardt, V.; Efimov, L.G.; Emelianov, V.; Engelage, J.; Eppley, G.; Erazmus, B.; Estienne, M.; Fachini, P.; Faine, V.; Faivre, J.; Fatemi, R.; Filimonov, K.; Filip, P.; Finch, E.; Fisyak, Y.; Flierl, D.; Foley, K.J.; Fu, J.; Gagliardi, C.A.; Ganti, M.S.; Gutierrez, T.D.; Gagunashvili, N.; Gans, J.; Gaudichet, L.; Germain, M.; Geurts, F.; Ghazikhanian, V.; Ghosh, P.; Gonzalez, J.E.; Grachov, O.; Grigoriev, V.; Gronstal, S.; Grosnick, D.; Guedon, M.; Guertin, S.M.; Gupta, A.; Gushin, E.; Hallman, T.J.; Hardtke, D.; Harris, J.W.; Heinz, M.; Henry, T.W.; Heppelmann, S.; Herston, T.; Hippolyte, B.; Hirsch, A.; Hjort, E.; Hoffmann, G.W.; Horsley, M.; Huang, H.Z.; Huang, S.L.; Humanic, T.J.; Igo, G.; Ishihara, A.; Jacobs, P.; Jacobs, W.W.; Janik, M.; Johnson, I.; Jones, P.G.; Judd, E.G.; Kabana, S.; Kaneta, M.; Kaplan, M.; Keane, D.; Kiryluk, J.; Kisiel, A.; Klay, J.; Klein, S.R.; Klyachko, A.; Koetke, D.D.; Kollegger, T.; Konstantinov, A.S.; Kopytine, M.; Kotchenda, L.; Kovalenko, A.D.; Kramer, M.; Kravtsov, P.; Krueger, K.; Kuhn, C.; Kulikov, A.I.; Kumar, A.; et al.

2004-01-08T23:59:59.000Z

399

Dielectron Mass Spectra from Au+Au Collisions at $\\sqrt{s_{\\rm NN}}$ = 200 GeV  

E-Print Network (OSTI)

We report the STAR measurements of dielectron ($e^+e^-$) production at midrapidity ($|y_{ee}|<$1) in Au+Au collisions at $\\sqrt{s_{\\rm NN}}$ = 200 GeV. The measurements are evaluated in different invariant mass regions with a focus on 0.30-0.76 ($\\rho$-like), 0.76-0.80 ($\\omega$-like), and 0.98-1.05 ($\\phi$-like) GeV/$c^{2}$. The spectrum in the $\\omega$-like and $\\phi$-like regions can be well described by the hadronic cocktail simulation. In the $\\rho$-like region, however, the vacuum $\\rho$ spectral function cannot describe the shape of the $\\rho$-like dielectron excess. In this range, an enhancement of 1.77$\\pm$0.11(stat.)$\\pm$0.24(sys.)$\\pm$0.34(cocktail) is determined with respect to the hadronic cocktail simulation that excludes the $\\rho$ meson. The enhancement shows no significant dependence on the collision centrality in 0-80% and on the dielectron transverse momentum ($p_{\\rm T}$) in $p_{\\rm T}<$2 GeV/$c$. Theoretical models with in-medium broadened $\\rho$ contributions can provide a consistent description of the dilepton mass spectra for the measurement presented here and the earlier data at the Super Proton Synchrotron energies.

STAR Collaboration; L. Adamczyk; J. K. Adkins; G. Agakishiev; M. M. Aggarwal; Z. Ahammed; I. Alekseev; J. Alford; C. D. Anson; A. Aparin; D. Arkhipkin; E. C. Aschenauer; G. S. Averichev; A. Banerjee; D. R. Beavis; R. Bellwied; A. Bhasin; A. K. Bhati; P. Bhattarai; H. Bichsel; J. Bielcik; J. Bielcikova; L. C. Bland; I. G. Bordyuzhin; W. Borowski; J. Bouchet; A. V. Brandin; S. G. Brovko; S. Bltmann; I. Bunzarov; T. P. Burton; J. Butterworth; H. Caines; M. Calderndze~la~Barca~Snchez; D. Cebra; R. Cendejas; M. C. Cervantes; P. Chaloupka; Z. Chang; S. Chattopadhyay; H. F. Chen; J. H. Chen; L. Chen; J. Cheng; M. Cherney; A. Chikanian; W. Christie; J. Chwastowski; M. J. M. Codrington; G. Contin; J. G. Cramer; H. J. Crawford; X. Cui; S. Das; A. Davila Leyva; L. C. De Silva; R. R. Debbe; T. G. Dedovich; J. Deng; A. A. Derevschikov; R. Derradi de Souza; S. Dhamija; B. di Ruzza; L. Didenko; C. Dilks; F. Ding; P. Djawotho; X. Dong; J. L. Drachenberg; J. E. Draper; C. M. Du; L. E. Dunkelberger; J. C. Dunlop; L. G. Efimov; J. Engelage; K. S. Engle; G. Eppley; L. Eun; O. Evdokimov; R. Fatemi; S. Fazio; J. Fedorisin; P. Filip; E. Finch; Y. Fisyak; C. E. Flores; C. A. Gagliardi; D. R. Gangadharan; D. Garand; F. Geurts; A. Gibson; M. Girard; S. Gliske; L. Greiner; D. Grosnick; D. S. Gunarathne; Y. Guo; A. Gupta; S. Gupta; W. Guryn; B. Haag; O. Hajkova; A. Hamed; L-X. Han; R. Haque; J. W. Harris; S. Heppelmann; A. Hirsch; G. W. Hoffmann; D. J. Hofman; S. Horvat; B. Huang; H. Z. Huang; X. Huang; P. Huck; T. J. Humanic; G. Igo; W. W. Jacobs; H. Jang; E. G. Judd; S. Kabana; D. Kalinkin; K. Kang; K. Kauder; H. W. Ke; D. Keane; A. Kechechyan; A. Kesich; Z. H. Khan; D. P. Kikola; I. Kisel; A. Kisiel; D. D. Koetke; T. Kollegger; J. Konzer; I. Koralt; L. Kotchenda; A. F. Kraishan; P. Kravtsov; K. Krueger; I. Kulakov; L. Kumar; R. A. Kycia; M. A. C. Lamont; J. M. Landgraf; K. D. Landry; J. Lauret; A. Lebedev; R. Lednicky; J. H. Lee; M. J. LeVine; C. Li; W. Li; X. Li; X. Li; Y. Li; Z. M. Li; M. A. Lisa; F. Liu; T. Ljubicic; W. J. Llope; M. Lomnitz; R. S. Longacre; X. Luo; G. L. Ma; Y. G. Ma; D. M. M. D. Madagodagettige Don; D. P. Mahapatra; R. Majka; S. Margetis; C. Markert; H. Masui; H. S. Matis; D. McDonald; T. S. McShane; N. G. Minaev; S. Mioduszewski; B. Mohanty; M. M. Mondal; D. A. Morozov; M. K. Mustafa; B. K. Nandi; Md. Nasim; T. K. Nayak; J. M. Nelson; G. Nigmatkulov; L. V. Nogach; S. Y. Noh; J. Novak; S. B. Nurushev; G. Odyniec; A. Ogawa; K. Oh; A. Ohlson; V. Okorokov; E. W. Oldag; D. L. Olvitt Jr.; M. Pachr; B. S. Page; S. K. Pal; Y. X. Pan; Y. Pandit; Y. Panebratsev; T. Pawlak; B. Pawlik; H. Pei; C. Perkins; W. Peryt; P. Pile; M. Planinic; J. Pluta; N. Poljak; J. Porter; A. M. Poskanzer; N. K. Pruthi; M. Przybycien; P. R. Pujahari; J. Putschke; H. Qiu; A. Quintero; S. Ramachandran; R. Raniwala; S. Raniwala; R. L. Ray; C. K. Riley; H. G. Ritter; J. B. Roberts; O. V. Rogachevskiy; J. L. Romero; J. F. Ross; A. Roy; L. Ruan; J. Rusnak; N. R. Sahoo; P. K. Sahu; I. Sakrejda; S. Salur; J. Sandweiss; E. Sangaline; A. Sarkar; J. Schambach; R. P. Scharenberg; A. M. Schmah; W. B. Schmidke; N. Schmitz; J. Seger; P. Seyboth; N. Shah; E. Shahaliev; P. V. Shanmuganathan; M. Shao; B. Sharma; W. Q. Shen; S. S. Shi; Q. Y. Shou; E. P. Sichtermann; R. N. Singaraju; M. J. Skoby; D. Smirnov; N. Smirnov; D. Solanki; P. Sorensen; H. M. Spinka; B. Srivastava; T. D. S. Stanislaus; J. R. Stevens; R. Stock; M. Strikhanov; B. Stringfellow; M. Sumbera; X. Sun; X. M. Sun; Y. Sun; Z. Sun; B. Surrow; D. N. Svirida; T. J. M. Symons; M. A. Szelezniak; J. Takahashi; A. H. Tang; Z. Tang; T. Tarnowsky; J. H. Thomas; A. R. Timmins; D. Tlusty; M. Tokarev; S. Trentalange; R. E. Tribble; P. Tribedy; B. A. Trzeciak; O. D. Tsai; J. Turnau; T. Ullrich; D. G. Underwood; G. Van Buren; G. van Nieuwenhuizen; M. Vandenbroucke; J. A. Vanfossen, Jr.; R. Varma; G. M. S. Vasconcelos; A. N. Vasiliev; R. Vertesi; F. Videbk; Y. P. Viyogi; S. Vokal; A. Vossen; M. Wada; F. Wang; G. Wang; H. Wang; J. S. Wang; X. L. Wang; Y. Wang; Y. Wang; G. Webb; J. C. Webb; G. D. Westfall; H. Wieman; S. W. Wissink; R. Witt; Y. F. Wu; Z. Xiao; W. Xie; K. Xin; H. Xu; J. Xu; N. Xu; Q. H. Xu; Y. Xu; Z. Xu; W. Yan; C. Yang; Y. Yang; Y. Yang; Z. Ye; P. Yepes; L. Yi; K. Yip; I-K. Yoo; N. Yu; Y. Zawisza; H. Zbroszczyk; W. Zha; J. B. Zhang; J. L. Zhang; S. Zhang; X. P. Zhang; Y. Zhang; Z. P. Zhang; F. Zhao; J. Zhao; C. Zhong; X. Zhu; Y. H. Zhu; Y. Zoulkarneeva; M. Zyzak

2013-12-28T23:59:59.000Z

400

Fermi LAT Observations of LS I +61 303: First Detection of an Orbital Modulation in GeV Gamma Rays  

SciTech Connect

This Letter presents the first results from the observations of LS I +61{sup o}303 using Large Area Telescope data from the Fermi Gamma-Ray Space Telescope between 2008 August and 2009 March. Our results indicate variability that is consistent with the binary period, with the emission being modulated at 26.6 {+-} 0.5 days. This constitutes the first detection of orbital periodicity in high-energy gamma rays (20 MeV-100 GeV, HE). The light curve is characterized by a broad peak after periastron, as well as a smaller peak just before apastron. The spectrum is best represented by a power law with an exponential cutoff, yielding an overall flux above 100 MeV of 0.82 {+-} 0.03(stat) {+-} 0.07(syst) 10{sup -6} ph cm{sup -2} s{sup -1}, with a cutoff at 6.3 {+-} 1.1(stat) {+-} 0.4(syst) GeV and photon index {Gamma} = 2.21 {+-} 0.04(stat) {+-} 0.06(syst). There is no significant spectral change with orbital phase. The phase of maximum emission, close to periastron, hints at inverse Compton scattering as the main radiation mechanism. However, previous very high-energy gamma ray (>100 GeV, VHE) observations by MAGIC and VERITAS show peak emission close to apastron. This and the energy cutoff seen with Fermi suggest that the link between HE and VHE gamma rays is nontrivial.

Abdo, A.A.; /Federal City Coll. /Naval Research Lab, Wash., D.C.; Ackermann, M.; /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept.; Ajello, M.; /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept.; Atwood, W.B.; /UC, Santa Cruz; Axelsson, M.; /Stockholm U., OKC /Stockholm U.; Baldini, L.; /INFN, Pisa; Ballet, J.; /DAPNIA, Saclay; Barbiellini, G.; /INFN, Trieste /Trieste U.; Bastieri, D.; /INFN, Padua /Padua U.; Baughman, B.M.; /Ohio State U.; Bechtol, K.; /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept.; Bellazzini, R.; /INFN, Pisa; Berenji, B.; /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept.; Blandford, R.; /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept.; Bloom, E.D.; /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept.; Bonamente, E.; /INFN, Perugia /Perugia U.; Borgland, A.W.; /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept.; Bregeon, J.; /INFN, Pisa; Brez, A.; /INFN, Pisa; Brigida, M.; /Bari U. /INFN, Bari; Bruel, P.; /Ecole Polytechnique /Washington U., Seattle /Bari U. /INFN, Bari /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /IASF, Milan /Milan Polytechnic /DAPNIA, Saclay /ASDC, Frascati /INFN, Perugia /Perugia U. /NASA, Goddard /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /DAPNIA, Saclay /Naval Research Lab, Wash., D.C. /George Mason U. /NASA, Goddard /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /INFN, Perugia /Perugia U. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /Montpellier U. /Sonoma State U. /Stockholm U., OKC /Royal Inst. Tech., Stockholm /Stockholm U. /DAPNIA, Saclay /NASA, Goddard /CSST, Baltimore /ASDC, Frascati /Naval Research Lab, Wash., D.C. /INFN, Trieste /Pavia U. /Bari U. /INFN, Bari /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /UC, Santa Cruz /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /SLAC /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys. Dept. /Grenoble, CEN; /more authors..

2012-04-02T23:59:59.000Z

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401

Fermi LAT observations of cosmic-ray electrons from 7 GeV to 1 TeV  

SciTech Connect

We present the results of our analysis of cosmic-ray electrons using about 8x10{sup 6} electron candidates detected in the first 12 months on-orbit by the Fermi Large Area Telescope. This work extends our previously published cosmic-ray electron spectrum down to 7 GeV, giving a spectral range of approximately 2.5 decades up to 1 TeV. We describe in detail the analysis and its validation using beam-test and on-orbit data. In addition, we describe the spectrum measured via a subset of events selected for the best energy resolution as a cross-check on the measurement using the full event sample. Our electron spectrum can be described with a power law {proportional_to}E{sup -3.08{+-}0.05} with no prominent spectral features within systematic uncertainties. Within the limits of our uncertainties, we can accommodate a slight spectral hardening at around 100 GeV and a slight softening above 500 GeV.

Ackermann, M.; Ajello, M.; Bechtol, K.; Berenji, B.; Blandford, R. D.; Bloom, E. D.; Bogart, J. R.; Borgland, A. W.; Buehler, R.; Cameron, R. A.; Charles, E.; Chiang, J.; Claus, R.; Digel, S. W.; Couto e Silva, E. do; Drell, P. S.; Drlica-Wagner, A.; Dubois, R.; Funk, S.; Glanzman, T. [W. W. Hansen Experimental Physics Laboratory, Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics and SLAC National Accelerator Laboratory, Stanford University, Stanford, California 94305 (United States)

2010-11-01T23:59:59.000Z

402

Precision Measurements of the Nucleon Strange Form Factors at Q^2 ~ 0.1GeV^2  

DOE Green Energy (OSTI)

We report new measurements of the parity-violating asymmetry A{sub PV} in elastic scattering of 3 GeV electrons off hydrogen and {sup 4}He targets with ({theta}{sub lab}) {approx} 6.0{sup o}. The {sup 4}He result is A{sub PV} = (+6.40 {+-} 0.23 (stat) {+-} 0.12 (syst)) x 10{sup -6}. The hydrogen result is A{sub PV} = (-1.58 {+-} 0.12 (stat) {+-} 0.04 (syst)) x 10{sup -6}. These results significantly improve constraints on the electric and magnetic strange form factors G{sub E}{sup s} and G{sub M}{sup s}. We extract G{sub E}{sup s} = 0.002 {+-} 0.014 {+-} 0.007 at (Q{sup 2}) = 0.077 GeV{sup 2}, and G{sub E}{sup s} + 0.09 G{sub M}{sup s} = 0.007 {+-} 0.011 {+-} 0.006 at (Q{sup 2}) = 0.109 GeV{sup 2}, providing new limits on the role of strange quarks in the nucleon charge and magnetization distributions.

Armando Acha Quimper; Konrad Aniol; David Armstrong; John Arrington; Todd Averett; Stephanie Bailey; James Barber; Arie Beck; Hachemi Benaoum; Jay Benesch; Pierre Bertin; Peter Bosted; Florentin Butaru; Etienne Burtin; Gordon Cates; Yu-Chiu Chao; Jian-Ping Chen; Eugene Chudakov; Evaristo Cisbani; Brandon Craver; Francesco Cusanno; Raffaele De Leo; Piotr Decowski; Alexandre Deur; Robert Feuerbach; John Finn; Salvatore Frullani; Sabine Fuchs; Kirsten Fuoti; Ronald Gilman; Lindsay Glesener; Klaus Grimm; Joseph Grames; Jens-ole Hansen; John Hansknecht; Douglas Higinbotham; Richard Holmes; Timothy Holmstrom; Hassan Ibrahim; Cornelis De Jager; Xiaodong Jiang; Joseph Katich; Lisa Kaufman; Aidan Kelleher; Paul King; Ameya Kolarkar; Stanley Kowalski; Elena Kuchina; Krishna Kumar; Luigi Lagamba; Peter Laviolette; John LeRose; Richard Lindgren; David Lhuillier; Nilanga Liyanage; Demetrius Margaziotis; Pete Markowitz; David Meekins; Zein-Eddine Meziani; Robert Michaels; Bryan Moffit; Sirish Nanda; Vladimir Nelyubin; Keith Otis; Kent Paschke; Sasha Philips; Benard Poelker; Roman Pomatsalyuk; Milan Potokar; Yelena Prok; Andrew Puckett; Y. Qian; Yi Qiang; Bodo Reitz; Julie Roche; Arunava Saha; Bradley Sawatzky; Jaideep Singh; Karl Slifer; Simon Sirca; Ryan Snyder; Patricia Solvignon; Paul Souder; Marcy Stutzman; Ramesh Subedi; Riad Suleiman; Vincent Sulkosky; William Tobias; Paul Ulmer; Guido Urciuoli; Kebin Wang; Richard Wilson; Bogdan Wojtsekhowski; Huan Yao; Yunxiu Ye; Xiaohui Zhan; Xiaochao Zheng; Shi-Lin Zhu; Vitaliy Ziskin

2006-09-11T23:59:59.000Z

403

New Results from the HAPPEx Experiments at Q^2= 0.1 GeV/c^2  

DOE Green Energy (OSTI)

The nucleon's strange electric and magnetic form factors G_E^s and G_M^s can be probed via parity-violating electron scattering. The HAPPEx collaboration has made new measurements of the parity-violating asymmetry A_PV in elastic scattering of 3 GeV electrons off hydrogen and 4He targets with = 6.0 degrees. For 4He the preliminary result is A_PV = (+6.43 +- 0.23 (stat) +- 0.22 (syst)) x 10^{-6}. For hydrogen the preliminary result isA_PV = (-1.60 +- 0.12 (stat) +- 0.05 (syst)) x 10^{-6}. From these values we extract G^s_E = 0.004 +- 0.014 +- 0.013at = 0.077 GeV/c^2, and G^s_E+ 0.09 G^s_M = 0.004 +- 0.011 +- 0.005at = 0.109 GeV/c^2, both consistent with zero, providing stringent new limits on the role of strange quarks in the vector structure of the nucleon.

David Armstrong

2006-05-16T23:59:59.000Z

404

BOILDDlG Ol'ILI'rDS PaR 7 GeV ADVABCED PlO1'OII SOURCE BASED...  

NLE Websites -- All DOE Office Websites (Extended Search)

Photon Source Based on Maxi.a. Coaponent Design of 1.1 GaV. The building utilities, electrical power and cooling water requirements, were estimated for the 7 GeV Advanced...

405

Direct Photons in p+p, d+Au and Au+Au Collisions at sqrt(s_NN) = 200 GeV  

E-Print Network (OSTI)

The PHENIX experiment has measured direct photons at $\\sqrt{s_{NN}}$ = 200 GeV in $p+p$, $d$+Au and Au+Au collisions. For $p_{T}$ $direct photons in Au+Au.

B. Sahlmueller; for the PHENIX Collaboration

2006-05-09T23:59:59.000Z

406

Charged hadron transverse momentum spectra in Au+Au and d+Au collisions at 200 GeV per nucleon pair  

E-Print Network (OSTI)

The Relativistic Heavy Ion Collider (RHIC) collides Au ions at a center of mass energy of 200 GeV per nucleon pair, which produces the most energetic collisions yet seen in the laboratory. RHIC has also collided proton ...

Kane, Jay Lawrence

2005-01-01T23:59:59.000Z

407

Study of natural spin-parity strange meson radial excitations in K/sup -/p. -->. K/sup -/. pi. /sup +/n at 11 GeV/c  

SciTech Connect

Results are presented from a high statistics study of the reaction K/sup -/p ..-->.. K/sup -/..pi../sup +/n at 11 GeV/c. This data was selected offline from an approx. 1000 event/..mu..b K/sup -/p experiment run on the Large Aperture Solenoid Spectrometer (LASS) at SLAC which triggered on essentially the total inelastic cross section. This K/sup -/..pi../sup +/n sample, after cuts, contained approx. 42,000 events in the K..pi.. invariant mass region from 0.65 GeV to 2.30 GeV, and absolute value t' < 0.2 GeV/sup 2/. A spherical harmonic angular moments analysis of this data is presented, as well as an energy independent partial wave analysis (PWA) of these angular moments. The nearly uniform acceptance characteristics of this data allowed a detailed analysis, which yielded information on natural spin-parity strange meson resonances in the K..pi.. invariant mass range from 0.65 GeV to 2.30 GeV. The well established K*(895), K*(1430), and K*(1780) are observed, and clear evidence is presented for a J/sup P/ = 4/sup +/ strange meson state at a mass of 2.08 GeV. The K/sup -/..pi../sup +/ elastic scattering partial waves extracted in this PWA show unambiguous evidence for a relatively narrow S wave resonance near 1.42 GeV in the K..pi.. invariant mass. This state is a confirmation of the 0/sup +/ K(1500) seen in previous PWA's. A new higher S wave resonance is clearly seen unambiguously near 1.90 GeV. Unambiguous evidence is presented for a relatively wide P wave resonance in the 1.70 GeV region.A second new P wave resonance also is seen in two of four ambiguous partial wave solutions in the 2.10 GeV region. These resonance states are discussed within the framework of a simple harmonic oscillator quark model. In particular three of the underlying resonances are discussed as possible natural spin-parity strange meson radial excitations.

Durkin, L.S.

1980-12-01T23:59:59.000Z

408

Study of natural spin-parity strange meson radial excitations in K/sup -/p. -->. K/sup -/. pi. /sup +/n at 11 GeV/c  

SciTech Connect

Results are presented from a high statistics study of the reaction K/sup -/p ..-->.. K/sup -/..pi../sup +/n at 11 GeV/c. This data was selected offline from an approx. 1000 event/..mu..b K/sup -/p experiment run on the Large Aperture Solenoid Spectrometer (LASS) at SLAC which triggered on essentially the total inelastic cross section. This K/sup -/..pi../sup +/n sample, after cuts, contained approx. 42,000 events in the K..pi.. invariant mass region from 0.65 GeV to 2.30 GeV, and absolute value t' < 0.2 GeV/sup 2/. A spherical harmonic angular moments analysis of this data is presented, as well as an energy independent partial wave analysis (PWA) of these angular moments. The nearly uniform acceptance characteristics of this data allowed a detailed analysis, which yielded information on natural spin-parity strange meson resonances in the K..pi.. invariant mass range from 0.65 GeV to 2.30 GeV. The well established K*(895), K*(1430), and K*(1780) are observed, and clear evidence is presented for a J/sup P/ = 4/sup +/ strange meson state at a mass of 2.08 GeV. The K/sup -/..pi../sup +/ elastic scattering partial waves extracted in this PWA show unambiguous evidence for a relatively narrow S wave resonance near 1.42 GeV in the K..pi.. invariant mass. This state is a confirmation of the 0/sup +/ K(1500) seen in previous PWA's. A new higher S wave resonance is clearly seen unambiguously near 1.90 GeV. Unambiguous evidence is presented for a relatively wide P wave resonance in the 1.70 GeV region.A second new P wave resonance also is seen in two of four ambiguous partial wave solutions in the 2.10 GeV region. These resonance states are discussed within the framework of a simple harmonic oscillator quark model. In particular three of the underlying resonances are discussed as possible natural spin-parity strange meson radial excitations.

Durkin, L.S.

1980-12-01T23:59:59.000Z

409

Ultra-low-energy ion-beam-synthesis of Ge nanocrystals in thin ALD Al2O3 layers for memory applications  

Science Conference Proceedings (OSTI)

Structural and electrical properties of ALD-grown 5 and 7nm-thick Al"2O"3 layers before and after implantation of Ge ions (1keV, 0.5-1x10^1^6 cm^-^2) and thermal annealing at temperatures in the 700-1050^oC range are reported. Transmission Electron Microscopy ... Keywords: Ge nanocrystals, Ion implantation, Nanocrystal memory

P. Dimitrakis; A. Mouti; C. Bonafos; S. Schamm; G. Ben Assayag; V. Ioannou-Sougleridis; B. Schmidt; J. Becker; P. Normand

2009-07-01T23:59:59.000Z

410

30TH INTERNATIONAL COSMIC RAY CONFERENCE Search for 1-100 GeV Emission from Gamma-Ray Bursts Using Milagro  

E-Print Network (OSTI)

30TH INTERNATIONAL COSMIC RAY CONFERENCE Search for 1-100 GeV Emission from Gamma-Ray Bursts Using one hundred gamma-ray bursts (GRBs) detected since the beginning of 2000 by BATSE, BeppoSax, HETE-2 spectra of gamma-ray bursts peak around a few hundred keV, EGRET has ob- served photons in the GeV energy

California at Santa Cruz, University of

411

The Science and Experimental Equipment for the 12 GeV Upgrade of CEBAF  

Science Conference Proceedings (OSTI)

This Conceptual Design Report (CDR) presents the compelling scientific case for upgrading the Continuous Electron Beam Accelerator Facility (CEBAF) at Jefferson Lab to 12 GeV. Such a facility will make profound contributions to the study of hadronic matter. In particular, it will allow breakthrough programs to be launched in four main areas: The experimental study of gluonic excitations in order to understand the funda- mentally new dynamics that underpins all of nuclear physics: the confinement of quarks. Theoretical conjectures, now strengthened by lattice QCD simulations, indicate that the most spectacular new prediction of QCD quark confinement occurs through the formation of a string-like flux tube between quarks. This conclusion (and proposed mechanisms of flux tube formation) can be tested by determining the spectrum of the gluonic excitations of mesons. The Fundamental Structure of the Nuclear Building Blocks. A vast improvement in our knowledge of the fundamental structure of the proton and neutron can be achieved. Not only can existing deep inelastic scattering cross sections be extended for the first time to cover the critical region where their basic three-quark structure dominates, but also measure- ments of new deep exclusive scattering cross sections will open the door to a comprehensive characterization of these wavefunctions using the framework of the Generalized Parton Distri- butions; these data will provide access to information on the correlations among the quarks. These studies will be complemented by detailed measurements of elastic and transition form factors, determining the dynamics underlying the quark-gluon structure through measure- ments of their high-momentum-transfer behavior and providing essential constraints on their description. The Physics of Nuclei. A broad and diversified program of measurements that (taken together with the hadron studies outlined above) aims to provide a firm intellectual under- pinning for all of nuclear physics by answering the question How does the phenomenological description of nuclei as nucleons interacting via an effective interaction parameterized using meson exchange arise from the underlying dynamics of quarks and gluons? It has two main components: The emergence of nuclei from QCD. Experiments aimed at understanding how the description of nuclei in terms of nucleons interacting via the N ? N force arises from the more fundamental QCD description. It includes the investigation of the partonic structure of nuclei, of short range structures in nuclei, and of the modification of the quark-gluon structure of the nucleons and mesons by the nuclear environment. Fundamental QCD processes in the nuclear arena. Experiments aimed at under- standing how hadron-hadron interactions arise from the underlying quark-gluon struc- ture of QCD. Tests of the Standard Model of electro-weak interactions and the determination of fundamental parameters of this model. Precision, parity-violating electron scat- tering experiments made feasible by the 12 GeV Upgrade have the sensitivity to search for deviations from the Standard Model that could signal the presence of new physics. Preci- sion measurements of the two-photon decay widths and transition form factors of the three neutral pseudoscalar mesons ?0, ?, and ? via the Primakoff effect will lead to a significant improvement on our knowledge of chiral symmetry in QCD, in particular on the ratios of quark masses and on chiral anomalies. This science program has expanded significantly since the project was first presented to the Nuclear Sciences Advisory Committee (NSAC) in the form of a White Paper [WP01] produced as part of the 2001-2002 NSAC Long Range Planning Process and since the pre-Conceptual Design Report (pCDR) produced in June 2004 to document the Upgrade science and experimental equipment plans [pCDR]. While focusing on science, this document also provides a brief description of the required detector and accelerator upgrades so that it can serve as an overview of t

Arrington, John; Bernstein, Aron; Brooks, William; Burker, Volker; Cardman, Lawrence; Carlson, Carl; Cates, Gordon; Chen, Jian-Ping; Dzierba, Alex; Ent, Rolf; Elouadrhiri, Latifa; Fenker, Howard; Gao, Haiyan; Gasparian, Ashot; Goity, Jose; Higinbotham, Douglas; Holt, Roy; Hyde, Charles; De Jager, Cornelis; Jeschonnek, Sabine; Ji, Xiangdong; Jiang, Xiangdong; Jones, Mark; Keppel, Cynthia; Kuhn, Sebastian; Kumar, Krishna; Laget, Jean; Mack, David; Meyer, Curtis; Melnitchouk, Wolodymyr; Meziani, Zein-Eddine; Radyushkin, Anatoly; Ramsey-Musolf, Mike; Reimer, Paul; Richards, David; Rondon-Aramayo, Oscar; Salgado, Carlos; Smith, Elton; Schiavilla, Rocco; Souder, Paul; Stoler, Paul; Thomas, Anthony; Ulmer, Paul; Weinstein, Lawrence; Weiss, Christian

2005-04-01T23:59:59.000Z

412

Applicability of a Bonner Shere technique for pulsed neutron in 120 GeV proton facility  

Science Conference Proceedings (OSTI)

The data on neutron spectra and intensity behind shielding are important for radiation safety design of high-energy accelerators since neutrons are capable of penetrating thick shielding and activating materials. Corresponding particle transport codes--that involve physics models of neutron and other particle production, transportation, and interaction--have been developed and used world-wide [1-8]. The results of these codes have been ensured through plenty of comparisons with experimental results taken in simple geometries. For neutron generation and transport, several related experiments have been performed to measure neutron spectra, attenuation length and reaction rates behind shielding walls of various thicknesses and materials in energy range up to several hundred of MeV [9-11]. The data have been used to benchmark--and modify if needed--the simulation modes and parameters in the codes, as well as the reference data for radiation safety design. To obtain such kind of data above several hundred of MeV, Japan-Fermi National Accelerator Laboratory (FNAL) collaboration for shielding experiments has been started in 2007, based on suggestion from the specialist meeting of shielding, Shielding Aspects of Target, Irradiation Facilities (SATIF), because of very limited data available in high-energy region (see, for example, [12]). As a part of this shielding experiment, a set of Bonner sphere (BS) was tested at the antiproton production target facility (pbar target station) at FNAL to obtain neutron spectra induced by a 120-GeV proton beam in concrete and iron shielding. Generally, utilization of an active detector around high-energy accelerators requires an improvement on its readout to overcome burst of secondary radiation since the accelerator delivers an intense beam to a target in a short period after relatively long acceleration period. In this paper, we employ BS for a spectrum measurement of neutrons that penetrate the shielding wall of the pbar target station in FNAL.

Sanami, T.; Hagiwara, M.; Iwase, H.; /KEK, Tsukuba; Iwamoto, Y.; Sakamoto, Y.; Nakashima, H.; /JAEA, Ibaraki; Arakawa, H.; Shigyo, N.; /Kyushu U.; Leveling, A.F.; Boehnlein, D.J.; Vaziri, K.; /Fermilab

2008-02-01T23:59:59.000Z

413

The neutron electric form factor to Q = 1.45 (GeV/c)  

Science Conference Proceedings (OSTI)

The nucleon elastic electromagnetic form factors are fundamental quantities needed for an understanding of nucleon and nuclear electromagnetic structure. The evolution of the Sachs electric and magnetic form factors with Q2, the square of the four-momentum transfer, is related to the distribution of charge and magnetization within the nucleon. High precision measurements of the nucleon form factors are essential for stringent tests of our current theoretical understanding of confinement within the nucleon. Measurements of the neutron form factors, in particular, those of the neutron electric form factor, have been notoriously difficult due to the lack of a free neutron target and the vanishing integral charge of the neutron. Indeed, a precise measurement of the neutron electric form factor has eluded experimentalists for decades; however, with the advent of high duty-factor polarized electron beam facilities, experiments employing polarization degrees of freedom have finally yielded the first precise measurements of this fundamental quantity. Following a general overview of the experimental and theoretical status of the nucleon form factors, a detailed description of an experiment designed to extract the neutron electric form factor from measurements of the neutron's recoil polarization in quasielastic 2H(e, e')1H scattering is presented. The experiment described here employed the Thomas Jefferson National Accelerator Facility's longitudinally polarized electron beam, a magnetic spectrometer for detection of the scattered electron, and a neutron polarimeter designed specifically for this experiment. Measurements were conducted at three Q2 values of 0.45, 1.13, and 1.45 (GeV/c)2, and the final results extracted from an analysis of the data acquired in this experiment are reported and compared with recent theoretical predictions for the nucleon form factors.

Bradley Plaster

2004-02-01T23:59:59.000Z

414

Cerenkov ring imaging and spectroscopy of charged KSTAR interactions at 11 GeV/c  

SciTech Connect

The physics and technology of this new Cerenkov detector are discussed, including materials studies, construction techniques, and resolution measurements. Sources of resolution error are individually identified and measured where possible. The results of all studied indicate that the measurement resolution is understood. This work has led to the adoption of a large scale ring imaging detector as part of a new high energy physics spectrometer, the SLD, at the Stanford Linear Accelerator Center. Results from an amplitude analysis of strange meson final states in K/sup /minus//p ..-->.. /ovr K/sub 0//..pi../sup /minus//p interactions are presented. The data derive from a 4 event/nb exposure of the LASS (large Aperture Superconducting Solenoid) spectrometer to an 11 GeV/c K/sup /minus// beam. The data sample consists of /approximately/100,000 vents distributed over the Dalitz plot of the channel. The process is observed to be dominated by the production and decay of natural spin-parity (J/sup P/ = 1/sup /minus//,2/sup +/,3/sup /minus//,/hor ellipsis/) strange meson states. The data can be understood in terms of a simple model in which the resonant /ovr K*/sup -// are produced predominantly via natural parity exchange in the t channel. The leading K*(890), K/sub 2/*(1430), and K*(1780) resonances are clearly observed and measured, and the underlying spectroscopy is also extracted. Indications of higher mass resonance production are also shown. The observed properties of these states are used to confront current models of quark spectroscopy in strange meson systems. 94 refs., 96 figs., 23 tabs.

Bird, P.F.

1988-11-01T23:59:59.000Z

415

7-GeV advanced photon source beamline initiative: Conceptual design report  

Science Conference Proceedings (OSTI)

The DOE is building a new generation 6-7 GeV Synchrotron Radiation Source known as the Advanced Photon Source (APS) at Argonne National Laboratory. This facility, to be completed in FY 1996, can provide 70 x-ray sources of unprecedented brightness to meet the research needs of virtually all scientific disciplines and numerous technologies. The technological research capability of the APS in the areas of energy, communications and health will enable a new partnership between the DOE and US industry. Current funding for the APS will complete the current phase of construction so that scientists can begin their applications in FY 1996. Comprehensive utilization of the unique properties of APS beams will enable cutting-edge research not currently possible. It is now appropriate to plan to construct additional radiation sources and beamline standard components to meet the excess demands of the APS users. In this APS Beamline Initiative, 2.5-m-long insertion-device x-ray sources will be built on four straight sections of the APS storage ring, and an additional four bending-magnet sources will also be put in use. The front ends for these eight x-ray sources will be built to contain and safeguard access to these bright x-ray beams. In addition, funds will be provided to build standard beamline components to meet scientific and technological research demands of the Collaborative Access Teams. The Conceptual Design Report (CDR) for the APS Beamline Initiative describes the scope of all the above technical and conventional construction and provides a detailed cost and schedule for these activities. The document also describes the preconstruction R&D plans for the Beamline Initiative activities and provides the cost estimates for the required R&D.

Not Available

1993-05-01T23:59:59.000Z

416

Physics Opportunities with the 12 GeV Upgrade at Jefferson Lab  

SciTech Connect

We are at the dawn of a new era in the study of hadronic nuclear physics. The non-Abelian nature of Quantum Chromodynamics (QCD) and the resulting strong coupling at low energies represent a significant challenge to nuclear and particle physicists. The last decade has seen the development of new theoretical and experimental tools to quantitatively study the nature of confinement and the structure of hadrons comprised of light quarks and gluons. Together these will allow both the spectrum and the structure of hadrons to be elucidated in unprecedented detail. Exotic mesons that result from excitation of the gluon field will be explored. Multidimensional images of hadrons with great promise to reveal the dynamics of the key underlying degrees of freedom will be produced. In particular, these multidimensional distributions open a new window on the elusive spin content of the nucleon through observables that are directly related to the orbital angular momenta of quarks and gluons. Moreover, computational techniques in Lattice QCD now promise to provide insightful and quantitative predictions that can be meaningfully confronted with, and elucidated by, forthcoming experimental data. In addition, the development of extremely high intensity, highly polarized and extraordinarily stable beams of electrons provides innovative opportunities for probing (and extending) the Standard Model, both through parity violation studies and searches for new particles. Thus the 12 GeV upgrade of the Continuous Electron Beam Accelerator Facility (CEBAF) at Jefferson Lab will enable a new experimental program with substantial discovery potential to address these and other important topics in nuclear, hadronic and electroweak physics.

Dudek, Jozef; Essig, Rouven; Kumar, Krishna; Meyer, Curtis; McKeown, Robert; Meziani, Zein Eddine; Miller, Gerald A; Pennington, Michael; Richards, David; Weinstein, Larry

2012-08-01T23:59:59.000Z

417

R{sub 4}Ir{sub 13}Ge{sub 9} (R=La, Ce, Pr, Nd, Sm) and RIr{sub 3}Ge{sub 2} (R=La, Ce, Pr, Nd): Crystal structures with nets of Ir atoms  

Science Conference Proceedings (OSTI)

The crystal structures of the new ternary compounds Sm{sub 4}Ir{sub 13}Ge{sub 9} and LaIr{sub 3}Ge{sub 2} were determined and refined on the basis of single-crystal X-ray diffraction data. They belong to the Ho{sub 4}Ir{sub 13}Ge{sub 9} (oP52, Pmmn) and CeCo{sub 3}B{sub 2} (hP5, P6/mmm) structure types, respectively. The formation of isotypic compounds R{sub 4}Ir{sub 13}Ge{sub 9} with R=La, Ce, Pr, Nd, and RIr{sub 3}Ge{sub 2} with R=Ce, Pr, Nd, was established by powder X-ray diffraction. The RIr{sub 3}Ge{sub 2} (R=La, Ce, Pr, Nd) compounds exist only in as-cast samples and decompose during annealing at 800 Degree-Sign C with the formation of R{sub 4}Ir{sub 13}Ge{sub 9}. The structure of Sm{sub 4}Ir{sub 13}Ge{sub 9} contains intersecting, slightly puckered nets of Ir atoms (4{sup 4})(4{sup 3}.6){sub 2}(4.6{sup 2}){sub 2} and (4{sup 4}){sub 2}(4{sup 3}.6){sub 4}(4.6{sup 2}){sub 2} that are perpendicular to [0 1 1] as well as to [0 -1 1] and [0 0 1]. The Ir atoms are surrounded by Ge atoms that form tetrahedra or square pyramids (where the layers intersect). The Sm and additional Ir atoms (in trigonal-planar coordination) are situated in channels along [1 0 0] (short translation vector). In the structure of LaIr{sub 3}Ge{sub 2} the Ir atoms form planar Kagome nets (3.6.3.6) perpendicular to [0 0 1]. These nets alternate along the short translation vector with layers of La and Ge atoms. - Graphical abstract: The crystal structures contain the nets of Ir atoms as main structural motif: R{sub 4}Ir{sub 13}Ge{sub 9} contains intersecting slightly puckered nets of Ir atoms, whereas in the structure of RIr{sub 3}Ge{sub 2} the Ir atoms form planar Kagome nets. Highlights: Black-Right-Pointing-Pointer The Ir-rich ternary germanides R{sub 4}Ir{sub 13}Ge{sub 9} (R=La, Ce, Pr, Nd, Sm) and RIr{sub 3}Ge{sub 2} (R=La, Ce, Pr, Nd) have been synthesized. Black-Right-Pointing-Pointer The RIr{sub 3}Ge{sub 2} compounds exist only in as-cast samples and decompose during annealing at 800 Degree-Sign C with the formation of R{sub 4}Ir{sub 13}Ge{sub 9}. Black-Right-Pointing-Pointer The structure of R{sub 4}Ir{sub 13}Ge{sub 9} contains intersecting slightly puckered nets of Ir atoms. Black-Right-Pointing-Pointer In the structure of RIr{sub 3}Ge{sub 2} the Ir atoms form planar Kagome nets.

Yarema, Maksym [Department of Inorganic Chemistry, Ivan Franko National University of Lviv, Kyryla i Mefodiya Str, 6, UA-79005 Lviv (Ukraine) [Department of Inorganic Chemistry, Ivan Franko National University of Lviv, Kyryla i Mefodiya Str, 6, UA-79005 Lviv (Ukraine); Swiss Federal Laboratories for Materials Science and Technology (EMPA), Ueberlandstr. 129, CH-8600 Duebendorf (Switzerland); Zaremba, Oksana; Gladyshevskii, Roman [Department of Inorganic Chemistry, Ivan Franko National University of Lviv, Kyryla i Mefodiya Str, 6, UA-79005 Lviv (Ukraine)] [Department of Inorganic Chemistry, Ivan Franko National University of Lviv, Kyryla i Mefodiya Str, 6, UA-79005 Lviv (Ukraine); Hlukhyy, Viktor, E-mail: viktor.hlukhyy@lrz.tu-muenchen.de [Department Chemie, Technische Universitaet Muenchen, Lichtenbergstr. 4, D-85747 Garching (Germany)] [Department Chemie, Technische Universitaet Muenchen, Lichtenbergstr. 4, D-85747 Garching (Germany); Faessler, Thomas F. [Department Chemie, Technische Universitaet Muenchen, Lichtenbergstr. 4, D-85747 Garching (Germany)] [Department Chemie, Technische Universitaet Muenchen, Lichtenbergstr. 4, D-85747 Garching (Germany)

2012-12-15T23:59:59.000Z

418

Measurements of the Electron-Helicity Dependent Cross Sections of Deeply Virtual Compton Scattering with CEBAF at 12 GeV  

E-Print Network (OSTI)

We propose precision measurements of the helicity-dependent and helicity independent cross sections for the ep->epg reaction in Deeply Virtual Compton Scattering (DVCS) kinematics. DVCS scaling is obtained in the limits Q^2>>Lambda_{QCD}^2, x_Bj fixed, and -\\Delta^2=-(q-q')^22 GeV^2, W>2 GeV, and -\\Delta^21 GeV^2. We will use our successful technique from the 5.75 GeV Hall A DVCS experiment (E00-110). With polarized 6.6, 8.8, and 11 GeV beams incident on the liquid hydrogen target, we will detect the scattered electron in the Hall A HRS-L spectrometer (maximum central momentum 4.3 GeV/c) and the emitted photon in a slightly expanded PbF_2 calorimeter. In general, we will not detect the recoil proton. The H(e,e'g)X missing mass resolution is sufficient to isolate the exclusive channel with 3% systematic precision.

J. Roche; C. E. Hyde-Wright; B. Michel; C. Munoz Camacho

2006-09-11T23:59:59.000Z

419

Measurements of the Electron-Helicity Dependent Cross Sections of Deeply Virtual Compton Scattering with CEBAF at 12 GeV  

E-Print Network (OSTI)

We propose precision measurements of the helicity-dependent and helicity independent cross sections for the ep->epg reaction in Deeply Virtual Compton Scattering (DVCS) kinematics. DVCS scaling is obtained in the limits Q^2>>Lambda_{QCD}^2, x_Bj fixed, and -\\Delta^2=-(q-q')^22 GeV^2, W>2 GeV, and -\\Delta^21 GeV^2. We will use our successful technique from the 5.75 GeV Hall A DVCS experiment (E00-110). With polarized 6.6, 8.8, and 11 GeV beams incident on the liquid hydrogen target, we will detect the scattered electron in the Hall A HRS-L spectrometer (maximum central momentum 4.3 GeV/c) and the emitted photon in a slightly expanded PbF_2 calorimeter. In general, we will not detect the recoil proton. The H(e,e'g)X missing mass resolution is sufficient to isolate the exclusive channel with 3% systematic precision.

Roche, J; Hyde-Wright, E; Gavalian, G; Amarian, M; Bltmann, S; Dodge, G E; Juengst, H; Lachniet, J; Radyushkin, A; Ulmer, P E; Weinstein, L B; Ball, J; Bertin, P Y; Brossard, M; De Masi, R; Garon, M; Girod, F X; Guidal, M; MacCormick, M; Mazouz, M; Niccolai, S; Pire, B; Procureur, S; Sabatie, F; Voutier, E; Wallon, S; Muoz Camacho, C; Camsonne, A; Chen, J P; Chudakov, E; Deur, A; Gaskell, D; Higinbotham, D; De Jager, C; Le Rose, J; Hansen, O; Michaels, R; Nanda, S; Saha, A; Stepanyan, S; Wojtsekhowski, B; Markowitz, P E C; Zheng, X; Gilman, R; Jiang, X; Kuchina, E; Ransome, R; Deshpande, Abhay A; Liyanage, N; Choi, S; Kang, H; Lee, B; Yumin, Oh; Jongsog, S; Sirca, S

2006-01-01T23:59:59.000Z

420

Spin Density Matrix Elements in Exclusive rho^0 Electroproduction on 1H and 2H Targets at 27.5 GeV Beam Energy  

E-Print Network (OSTI)

Spin Density Matrix Elements (SDMEs) describing the angular distribution of exclusive rho^0 electroproduction and decay are determined in the HERMES experiment with 27.6 GeV beam energy and unpolarized hydrogen and deuterium targets. Eight (fifteen) SDMEs that are related (unrelated) to the longitudinal polarization of the beam are extracted in the kinematic region 1 GeV^2 < Q^2 < 7 GeV^2, 3.0 GeV < W < 6.3 GeV, and -t < 0.4 GeV^2. Within the given experimental uncertainties, a hierarchy of relative sizes of helicity amplitudes is observed. Kinematic dependences of all SDMEs on Q^2 and t are presented, as well as the longitudinal-to-transverse rho^0 electroproduction cross section ratio as a function of Q^2. A small but statistically significant deviation from the hypothesis of s-channel helicity conservation is observed. An indication is seen of a contribution of unnatural-parity-exchange amplitudes; these amplitudes are naturally generated with a quark-exchange mechanism.

HERMES Collaboration; A. Airapetian

2009-01-06T23:59:59.000Z

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421

Measurements of the Electron-Helicity Dependent Cross Sections of Deeply Virtual Compton Scattering with CEBAF at 12 GeV  

DOE Green Energy (OSTI)

We propose precision measurements of the helicity-dependent and helicity independent cross sections for the ep {yields} ep{gamma} reaction in Deeply Virtual Compton Scattering (DVCS) kinematics. DVCS scaling is obtained in the limits Q{sup 2} >> {Lambda}{sub QCD}{sup 2}, x{sub Bj} fixed, and -{Delta}{sup 2} = -(q-q{prime}){sup 2} << Q{sup 2}. We consider the specific kinematic range Q{sup 2} > 2 GeV{sup 2}, W > 2 GeV, and -{Delta}{sup 2} {le} 1 GeV{sup 2}. We will use our successful technique from the 5.75 GeV Hall A DVCS experiment (E00-110). With polarized 6.6, 8.8, and 11 GeV beams incident on the liquid hydrogen target, we will detect the scattered electron in the Hall A HRS-L spectrometer (maximum central momentum 4.3 GeV/c) and the emitted photon in a slightly expanded PbF{sub 2} calorimeter. In general, we will not detect the recoil proton. The H(e,e{prime}{gamma})X missing mass resolution is sufficient to isolate the exclusive channel with 3% systematic precision.

J. Roche; C. E. Hyde-Wright; B. Michel; C. Munoz Camacho; et al. (The Jefferson Lab Hall A Collaboration)

2006-09-11T23:59:59.000Z

422

A spectroscopic ellispometric study of the tunability of the optical constants and thickness of GeO{sub x} films with swift heavy ions  

Science Conference Proceedings (OSTI)

Sub-stoichiometric GeO{sub x} films were fabricated by electron-beam evaporation method. The films were irradiated with 100 MeV Ag{sup 7+} ions at fluences between 1 x 10{sup 12} and 1 x 10{sup 14} ions-cm{sup -2}. Spectroscopic ellipsometric measurements were performed in air at room temperature. The values of the layer thickness and refractive index were extracted from ellipsometry using a multilayer analysis and the Tauc Lorentz model. The refractive index (at 633 nm) of the as-deposited GeO{sub x} film was estimated to be 1.860 and decreased to 1.823 for films irradiated at an ion fluence of 1 x 10{sup 14} ions-cm{sup -2}. The thickness of the films also decreased after irradiation and is due to a sputtering induced by the ion beam. The change in the refractive index with ion fluence is attributed to a stoichiometric change and structural transformation represented by GeO{sub x}{yields} Ge + GeO{sub y} (y > x) occurring due to a thermal spike induced by ion irradiation. Swift heavy ions thus provide a scope for modulating the refractive index of GeO{sub x} films. The thickness and stoichiometric changes are supported by Rutherford backscattering measurements.

Vijayarangamuthu, K.; Singh, Chaman; Rath, Shyama [Department of Physics and Astrophysics, University of Delhi, Delhi 110007 (India); Kabiraj, D. [Inter-University Accelerator Centre, Aruna Asaf Ali Marg, New Delhi 110067 (India)

2011-09-15T23:59:59.000Z

423

Luminosity issues in 2009 100 GeV polarized proton run  

SciTech Connect

Several luminosity issues are reviewed. Questions remain, which are stated for further investigation. Some suggestions are made for possible luminosity improvement. There are several factors affecting the luminosity in 2009 100 GeV polarized proton run: (1) The highest bunch intensity at RHIC early store (1.5 hour after accramp in this note) in 2009 is 1.25 x 10{sup 11} protons. In 2008 run, it was 1.42 x 10{sup 11} protons, which gives rise to 30% higher luminosity if other conditions are the same. Yellow ramp efficiency is identified as one of the main problem. Meanwhile, the beam-beam induced loss in about 1 hour into collision accounts actually no less than the ramp. (2) The typical transverse emittance at early store is 13 {pi}{micro}m for bunch intensity of 10{sup 11} protons, but it is 17 {pi}{micro} for 1.25 x 10{sup 11} protons. The increase of the emittance implies a 30% difference in luminosity if other conditions are the same. The emittance growth with electron cloud below instability threshold may be partially responsible. Meanwhile, the Booster scraping may also be relevant. (3) The luminosity lifetime in 2009 run is significantly lower than that in 2005, 2006, and 2008 runs. At the beam-beam parameter of 0.01, the typical average luminosity lifetime in early store is 10 hours in 2009, and it is 15 hours in previous runs. Given 8 hours of store time, this implies more than 20% of the difference in integrated luminosity. The 0.7 m betastar adopted in 2009 might be relevant, but the evidence is not fully convincing. On the other hand, the continuing RF voltage ramp in store may be of concern. (4) In the last month of the run, the polarization at RHIC early store is declined from 60% to 55%, a 30% reduction in p{sup 4} factor. It is noted that the Booster scraping is reduced in order to increase bunch intensity at RHIC, and the source polarization is also declined at the same time. Questions regarding these issues are discussed, and some suggestions are made.

Zhang,S.Y.

2009-08-01T23:59:59.000Z

424

Structural and electronic studies of a-SiGe:H alloys. Final subcontract report, 1 January 1991--28 February 1993  

DOE Green Energy (OSTI)

This report describes work to produce alloys of a-Si{sub 1-x}Ge{sub x}:H of improved photoelectronic quality by plasma-enhanced chemical vapor deposition (PECVD). The goal was to discover optimum preparation conditions for the end-component, a-Ge:H, to establish whether modification of the usual practice of starting from a-Si:H preparation conditions was advisable. Such modification, found to be necessary, gave films of a-Ge:H with efficiency-mobility-lifetime products ({eta}{mu}{tau}) 10{sup 2} to 10{sup 3} higher than were earlier available, in homogeneous environmentally stable material. Both a-Ge:H and a-Si{sub 1-x}Ge{sub x}:H of large x were studied in detail. Alloy material was shown to have {eta}{mu}{tau} 10{sup 2} larger than found earlier. However, just as the {eta}{mu}{tau} of a-Si:H decreases when Ge is added, so also the {eta}{mu}{tau} of these alloys with Si addition. By contrast, the ambipolar diffusion lengths, L{sub o} which are governed by the hole mobility, vary by only a factor of two over the whole alloy series. Using the experimental finding of a small valence band offset between a-Si:H and a-Ge:H compositional fluctuations on a 10-mm scale are suggested to explain the behavior of {eta}{mu}{tau} and L{sub o} The implications for eventual improvement of the alloys are profound, but require direct experimental tests of the postulated compositional fluctuations.

Paul, W. [Harvard Univ., Cambridge, MA (United States)

1993-04-01T23:59:59.000Z

425

Broad Line Radio Galaxies Observed with Fermi-LAT: The Origin of the GeV Gamma-Ray Emission  

SciTech Connect

We report on a detailed investigation of the {gamma}-ray emission from 18 broad line radio galaxies (BLRGs) based on two years of Fermi Large Area Telescope (LAT) data. We confirm the previously reported detections of 3C 120 and 3C 111 in the GeV photon energy range; a detailed look at the temporal characteristics of the observed {gamma}-ray emission reveals in addition possible flux variability in both sources. No statistically significant {gamma}-ray detection of the other BLRGs was however found in the considered dataset. Though the sample size studied is small, what appears to differentiate 3C 111 and 3C 120 from the BLRGs not yet detected in {gamma}-rays is the particularly strong nuclear radio flux. This finding, together with the indications of the {gamma}-ray flux variability and a number of other arguments presented, indicate that the GeV emission of BLRGs is most likely dominated by the beamed radiation of relativistic jets observed at intermediate viewing angles. In this paper we also analyzed a comparison sample of high accretion-rate Seyfert 1 galaxies, which can be considered radio-quiet counterparts of BLRGs, and found none were detected in {gamma}-rays. A simple phenomenological hybrid model applied for the broad-band emission of the discussed radio-loud and radio-quiet type 1 active galaxies suggests that the relative contribution of the nuclear jets to the accreting matter is {ge} 1% on average for BLRGs, while {le} 0.1% for Seyfert 1 galaxies.

Kataoka, J.; /Waseda U., RISE; Stawarz, L.; /JAXA, Sagamihara /Jagiellonian U., Astron. Observ.; Takahashi, Y.; /Waseda U., RISE; Cheung, C.C.; /Natl. Acad. Sci. /Naval Research Lab, Wash., D.C.; Hayashida, M.; /SLAC /Stanford U., HEPL /KIPAC, Menlo Park; Grandi, P.; /Bologna Observ.; Burnett, T.H.; /Washington U., Seattle; Celotti, A.; /SISSA, Trieste; Fegan, S.J.; Fortin, P.; /Ecole Polytechnique; Maeda, K.; Nakamori, T.; /Waseda U., RISE; Taylor, G.B.; /New Mexico U.; Tosti, G.; /INFN, Perugia /Perugia U.; Digel, S.W.; /SLAC /Stanford U., HEPL /KIPAC, Menlo Park; McConville, W.; /NASA, Goddard /Maryland U.; Finke, J.; /Naval Research Lab, Wash., D.C.; D'Ammando, F.; /IASF, Palermo /INAF, Rome

2012-06-07T23:59:59.000Z

426

Multihadron-event properties in e sup + e sup minus annihilation at radical s =52--57 GeV  

Science Conference Proceedings (OSTI)

We present the general properties of multihadron final states produced by {ital e}{sup +}{ital e}{sup {minus}} annihilation at center-of-mass energies from 52 to 57 GeV in the AMY detector at the KEK collider TRISTAN. Global shape, inclusive charged-particle, and particle-flow distributions are presented. Our measurements are compared with QCD+fragmentation models that use either leading-logarithmic parton-shower evolution or QCD matrix elements at the parton level, and either string or cluster fragmentation for hadronization.

Li, Y.K.; Li, J.; Cheng, C.P.; Gu, P.; Ye, M.H.; Zhu, Y.C.; Imlay, R.; Kirk, P.; Lim, J.; McNeil, R.R.; Metcalf, W.; Myung, S.S.; Abashian, A.; Gotow, K.; Hu, K.P.; Low, E.H.; Mattson, M.E.; Piilonen, L.; Sterner, K.L.; Lusin, S.; Rosenfeld, C.; Wang, A.T.M.; Wilson, S.; Frautschi, M.; Kagan, H.; Kass, R.; Trahern, C.G.; Breedon, R.E.; Kim, G.N.; Ko, W.; Lander, R.L.; Maeshima, K.; Malchow, R.L.; Smith, J.R.; Stuart, D.; Abe, K.; Fujii, Y.; Higashi, Y.; Kim, S.K.; Kurihara, Y.; Maki, A.; Nozaki, T.; Omori, T.; Sagawa, H.; Sakai, Y.; Sugimoto, Y.; Takaiwa, Y.; Terada, S.; Walker, R.C.; Kajino, F.; Perticone, D.; Poling, R.; Thomas, T.; Ishi, Y.; Miyano, K.; Miyata, H.; Sasaki, T.; Yamashita, Y.; Bacala, A.; Liu, J.; Park, I.H.; Sannes, F.; Schnetzer, S.; Stone, R.; Vinson, J.; Auchincloss, P.; Blanis, D.; Bodek, A.; Budd, H.; Eno, S.; Fry, C.A.; Harada, H.; Ho, Y.H.; Kim, Y.K.; Kumita, T.; Mori, T.; Olsen, S.L.; Shaw, N.M.; Sill, A.; Thorndike, E.H.; Ueno, K.; Zheng, H.W.; Kobayashi, S.; The AMY Collaboration

1990-05-01T23:59:59.000Z

427

Finite element simulation for ultraviolet excimer laser processing of patterned Si/SiGe/Si(100) heterostructures  

SciTech Connect

Ultraviolet (UV) Excimer laser assisted processing is an alternative strategy for producing patterned silicon germanium heterostructures. We numerically analyzed the effects caused by pulsed 193 Excimer laser radiation impinging on patterned amorphous hydrogenated silicon (a-Si:H) and germanium (a-Ge:H) bilayers deposited on a crystalline silicon substrate [Si(100)]. The proposed two dimensional axisymmetric numerical model allowed us to estimate the temperature and concentration gradients caused by the laser induced rapid melting and solidification processes. Energy density dependence of maximum melting depth and melting time evolution as well as three dimensional temperature and element distribution have been simulated and compared with experimentally obtained results.

Conde, J. C.; Chiussi, S.; Gontad, F.; Gonzalez, P. [Dpto. Fisica Aplicada, University of Vigo, E-36310 Vigo (Spain); Martin, E. [Dpto. Mecanica, Maquinas, Motores Termicos y Fluidos, University of Vigo, E-36310 Vigo (Spain); Serra, C. [CACTI, University of Vigo, E-36310 Vigo (Spain)

2010-07-05T23:59:59.000Z

428

Recoil Polarization Measurements of the Proton Electromagnetic Form Factor Ratio to Q^2 = 8.5 GeV^2  

E-Print Network (OSTI)

Among the most fundamental observables of nucleon structure, electromagnetic form factors are a crucial benchmark for modern calculations describing the strong interaction dynamics of the nucleon's quark constituents; indeed, recent proton data have attracted intense theoretical interest. In this letter, we report new measurements of the proton electromagnetic form factor ratio using the recoil polarization method, at momentum transfers Q2=5.2, 6.7, and 8.5 GeV2. By extending the range of Q2 for which GEp is accurately determined by more than 50%, these measurements will provide significant constraints on models of nucleon structure in the non-perturbative regime.

A. J. R. Puckett; E. J. Brash; M. K. Jones; W. Luo; M. Meziane; L. Pentchev; C. F. Perdrisat; V. Punjabi; F. R. Wesselmann; A. Ahmidouch; I. Albayrak; K. A. Aniol; J. Arrington; A. Asaturyan; H. Baghdasaryan; F. Benmokhtar; W. Bertozzi; L. Bimbot; P. Bosted; W. Boeglin; C. Butuceanu; P. Carter; S. Chernenko; E. Christy; M. Commisso; J. C. Cornejo; S. Covrig; S. Danagoulian; A. Daniel; A. Davidenko; D. Day; S. Dhamija; D. Dutta; R. Ent; S. Frullani; H. Fenker; E. Frlez; F. Garibaldi; D. Gaskell; S. Gilad; R. Gilman; Y. Goncharenko; K. Hafidi; D. Hamilton; D. W. Higinbotham; W. Hinton; T. Horn; B. Hu; J. Huang; G. M. Huber; E. Jensen; C. Keppel; M. Khandaker; P. King; D. Kirillov; M. Kohl; V. Kravtsov; G. Kumbartzki; Y. Li; V. Mamyan; D. J. Margaziotis; A. Marsh; Y. Matulenko; J. Maxwell; G. Mbianda; D. Meekins; Y. Melnik; J. Miller; A. Mkrtchyan; H. Mkrtchyan; B. Moffit; O. Moreno; J. Mulholland; A. Narayan; S. Nedev; Nuruzzaman; E. Piasetzky; W. Pierce; N. M. Piskunov; Y. Prok; R. D. Ransome; D. S. Razin; P. Reimer; J. Reinhold; O. Rondon; M. Shabestari; A. Shahinyan; K. Shestermanov; S. Sirca; I. Sitnik; L. Smykov; G. Smith; L. Solovyev; P. Solvignon; R. Subedi; E. Tomasi-Gustafsson; A. Vasiliev; M. Veilleux; B. B. Wojtsekhowski; S. Wood; Z. Ye; Y. Zanevsky; X. Zhang; Y. Zhang; X. Zheng; L. Zhu

2010-05-19T23:59:59.000Z

429

Reducing the longitudinal emittance of the 8-GeV beam via the rf manipulation in a booster cycle  

Science Conference Proceedings (OSTI)

Bunch rotation will cause the longitudinal emittance growth whenever there are far more A rf stations than B rf stations, or vice versa. An alternate method via optimizing the RFSUM curve in a Booster cycle has been investigated using the ESME simulation. Since the rf manipulation at transition crossing can reduce the longitudinal emittance 31% and the momentum spread 17%, eventually, the rms momentum spread of 2.98 MeV and the longitudinal emittance of 0.061 eV {center_dot} sec with 95% of the beam can be achieved at 8-GeV.

Yang, Xi; Lebedev, Valeri A.; Ankenbrandt, Charles M.; /Fermilab

2005-08-01T23:59:59.000Z

430

Reducing the momentum spread of 8-GeV proton beam via the bunch rotation in Booster  

Science Conference Proceedings (OSTI)

It requires Booster to be able to deliver 8-GeV proton beams to Main Injector at the intensity of 4.5 x 10{sup 12} per batch with a longitudinal emittance of 0.12 eV {center_dot} sec and a momentum spread ({Delta}p) of 18 MeV in order to achieve the antiproton production rate of 24 x 10{sup 10} per hour. Bunch rotation via the RFSUM reduction at the end of a cycle has been implemented to reach the goal. Afterward, it is important for us to develop diagnostic tools and tuning capabilities to make bunch rotation operationally reliable.

Yang, Xi; Ankenbrandt, Charles M.; Padilla, Rene; Pellico, William A.; Dey, Joseph E.; Koba, Kiyomi; /Fermilab

2005-06-01T23:59:59.000Z

431

Cross section and recoil properties of copper isotopes from uranium bombarded with 12-GeV protons  

SciTech Connect

Cross sections and thick-target recoil properties have been measured on of /sup 238/U with protons. The kinetic energies are much smaller than expected From a conventional fission process, even for the neutron-rich /sup 67/Cu. It is proposed thai these Cu nuclides are produced at proton energies above 3 GeV by the fission of low mass nuclei which are the residues of an intranuclear cascade process involving high deposition energy and the emission of fragments prior to fission both in the fast cascade and the evaporation stage. (auth)

Chang, S.K.; Sugarman, N.

1973-08-01T23:59:59.000Z

432

Single photon emission from impurity centers in AlGaAs epilayers on Ge and Si substrates  

SciTech Connect

We show that the epitaxial growth of thin layers of AlGaAs on Ge and Si substrates allows to obtain single photon sources by exploiting the sparse and unintentional contamination with acceptors of the AlGaAs. Very bright and sharp single photoluminescence lines are observed in confocal microscopy. These lines behave very much as single excitons in quantum dots, but their implementation is by far much easier, since it does not require 3D nucleation. The photon antibunching is demonstrated by time resolved Hanbury Brown and Twiss measurements.

Minari, S.; Cavigli, L.; Sarti, F.; Abbarchi, M.; Accanto, N.; Munoz Matutano, G.; Vinattieri, A.; Gurioli, M. [Dipartimento di Fisica e Astronomia, LENS and CNISM, Universita di Firenze, Via Sansone 1, I-50019 Firenze (Italy); Bietti, S.; Sanguinetti, S. [Dipartimento di Scienza dei Materiali and L-NESS, Universita di Milano Bicocca, Via Cozzi 53, I-20125 Milano (Italy)

2012-10-22T23:59:59.000Z

433

The Feasibility of Near-field ODR Beam-size Monitoring at 23 GeV at FACET  

SciTech Connect

Extension of near-field optical diffraction radiation (ODR) imaging to the 23 GeV beams at the proposed FACET facility at SLAC has been evaluated. The beam-size sensitivity at the 10- to 20-{micro}m sigma level based on a simple model will be reported. Polarization effects are also seen to be important and will be discussed. The comparisons to previous experimental results and the modeling results indicate sufficient feasibility for planning of the experiments in the coming year.

Lumpkin, A.H.; /Fermilab; Yao, C.-Y.; /Argonne; Hogan, M.; /SLAC; Muggli, P.; /Southern California U.

2012-06-01T23:59:59.000Z

434

High Transverse Momentum Xi Baryon Correlations in p+p Collisions at s^(1/2)=200 GeV  

E-Print Network (OSTI)

Angular correlations between produced high pT Xi baryons and unidentified charged and neutral particles are observed in high-tower-triggered (on a large electromagnetic energy deposit) s^(1/2)=200 GeV p+p collisions. This trigger favors events with higher average multiplicity than those in minimum bias. These events are likely to contain jets. The average multiplicity of a high-tower triggered event is similar to that of a minimum bias event containing a Xi, which implies that Xi baryons are likely to be produced in jets. Xi mean pT is higher in the triggered data then in the minimum bias sample.

Betty I. Bezverkhny

2005-11-08T23:59:59.000Z

435

Lambda0 polarization in p p ---> p Lambda0 K+ (pi+ pi-) at 27.5-GeV  

DOE Green Energy (OSTI)

The polarization of 1973 {Lambda}{sup 0}'s from the specific reaction pp {yields} p{Lambda}{sup 0}K{sup +}({pi}{sup +}{pi}{sup -}){sup 5} created by 27.5 Gev incident protons on a liquid hydrogen target, as a function of {chi}{sub F}, P{sub T}, and M{sub {Lambda}{sup 0}K{sup +}}, is, within statistics, consistent with the polarization of {Lambda}{sup 0}'s from pp {yields} P{sub fast} {Lambda}{sup 0}K{sup +} at 800 GeV.

Felix, J.; Christian, D.C.; Church, M.D.; Forbush, M.; Gottschalk, E.E.; Gutierrez, G.; Hartouni, E.P.; Holmes, Stephen D.; Huson, F.R.; Jensen, D.A.; Knapp, B.C.; Kreisler, M.N.; Uribe, J.; Stern, B.J.; Wang, M.H.L.S.; Wehmann, A.; Wiencke, L.R.; White, J.T.; /Guanajuato U. /Fermilab /Nevis Labs, Columbia U. /Texas A-M /Massachusetts U.,

2004-10-01T23:59:59.000Z

436

The preliminary result from spectra of K 0 s? ? in reaction p+propane at 10 GeV/c.  

E-Print Network (OSTI)

The experimental data from 2m propane bubble chamber have been analyzed to search for scalar meson ?(800) in a K 0 s? decay mode for the reaction p+C3H8 at 10 GeV/c. The K 0 s? ? invariant mass spectrum has shown resonant structures with M K 0 s ? ?=730, 900 and ?=143, 48 MeV/c2, respectively. The statistical significance are estimated to be of 14.2? and 4.2?, respectively. The peak in M(900) is identified as reflection from the well known resonance with mass of 892 MeV/c 2. 1

unknown authors

2006-01-01T23:59:59.000Z

437

Elimination of gold diffusion in the heterostructure core/shell growth of high performance Ge/Si nanowire HFETs  

SciTech Connect

Radial heterostructure nanowires offer the possibility of surface, strain, band-edge and modulution-doped engineering for optimizing performance of nanowire transistors. Synthesis of such heterostructures is non-trivial and is typically accompanied with Au diffusion on the nanowire sidewalls that result in rough morphology and undesired whisker growth. Here, they report a novel growth procedure to synthesize Ge/Si core/multi-shell nanowires by engineering the growth interface between the Au seed and the nanowire sidewalls. Single crystal Ge/Si core/multi-shell nanowires are used to fabricate side-by-side FET transistors with and without Au diffusion. Elimination of Au diffusion in the synthesis of such structures led to {approx} 2X improvement in hole field-effect mobility, transconductances and currents. Initial prototype devices with a 10 nm PECVD nitride gate dielectric resulted in a record maximum on current of 430 {micro}A/V (I{sub DS}L{sub G}/{pi}DV{sub DS}), {approx} 2X higher than ever achieved before in a p-type FET.

Picraux, Samuel T [Los Alamos National Laboratory; Dayeh, Shadi A [Los Alamos National Laboratory

2010-01-01T23:59:59.000Z

438

Search for Charged Higgs Bosons in e+e- Collisions at sqrts(s) = 189-209 GeV  

E-Print Network (OSTI)

A search is made for charged Higgs bosons predicted by Two-Higgs-Doublet extensions of the Standard Model (2HDM) using electron-positron collision data collected by the OPAL experiment at sqrt(s)=189-209 GeV, corresponding to an integrated luminosity of approximately 600 pb-1. Charged Higgs bosons are assumed to be pair-produced and to decay into q qbar, tau nu or A W+-. No signal is observed. Model-independent limits on the charged Higgs-boson production cross section are derived by combining these results with previous searches at lower energies. Under the assumption BR(H+- -> tau nu) + BR(H+- -> qq)=1, motivated by general 2HDM type II models, excluded areas on the [m(H+-), BR(H+- -> tau nu)] plane are presented and charged Higgs bosons are excluded up to a mass of 76.3 GeV at 95% confidence level, independent of the branching ratio BR(H+- -> tau nu). A scan of the 2HDM type I model parameter space is performed and limits on the Higgs-boson masses m(H+-) and m(A) are presented for different choices of tan(beta).

The OPAL collaboration

2008-12-01T23:59:59.000Z

439

Enhancement of Loop induced 125GeV Higgs pair production through Large-Extra-Dimensions model at the LHC  

E-Print Network (OSTI)

Based on the analysis of 5 fb^-1 of data at the LHC, the ATLAS and CMS collaborations have presented evidence for a Higgs boson with a mass in the 125 GeV range. We consider the 125 GeV neutral Higgs pair production process in the context of large-extra-dimensions(LED) model including the Kaluza-Klein(KK) excited gravitons at the LHC. We take into account the LED effects coming from gluon-gluon fusion and quark-antiquark collision channels as well as their corresponding next-to-leading order(NLO) QCD loop induced corrections. We analyse their impacts on both the total cross section and some key distributions. Indeed,pp -> HH has the clear advantage of a lower standard model(SM) background compare to process like pp -> jj, though its SM prediction is very small, it is shown that the LED model raises the cross section of Higgs pair production compare to its SM prediction and enhance the transverse momentum(pHT) and invariant mass(MHH) Distributions especially at high scales of pH T and MHH. By including the NLO QCD loop corrections, the scale dependence of total cross section can be reduced obviously. Choose suitable decay modes like HH -> bbrr or HH -> bbmumu and some simple cuts, we can strongly reduce the SM background but keep most of the LED effects, leading Higgs pair production a promising channel to search LED effects.

Hao Sun; Ya-Jin Zhou

2012-11-27T23:59:59.000Z

440

Constraints on large-extra-dimensions model through 125 GeV Higgs pair production at the LHC  

E-Print Network (OSTI)

Based on the analysis of 5 fb^-1 of data at the LHC, the ATLAS and CMS collaborations have presented evidence for a Higgs boson with a mass in the 125 GeV range. We consider the 125 GeV neutral Higgs pair production process in the context of large-extra-dimensions (LED) model including the Kaluza-Klein (KK)excited gravitons at the LHC. We consider the standard model(SM) Higgs pair production in gluon-gluon fusion channel and pure LED effects through graviton exchange as well as their interferences. It is shown that such interferences should be included; the LED model raises the transverse momentum (Pt)and invariant mass (M_HH) distributions at high scales of Pt and M_HH of the Higgs pair production. By using the Higgs pair production we could set the discovery limit on the cutoff scale M_S up to 6 TeV for delta = 2 and 4.5 TeV for delta = 6.

Hao Sun; Ya-Jin Zhou; He Chen

2012-11-22T23:59:59.000Z

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441

Emission of forward neutrons by 158A GeV indium nuclei in collisions with Al, Cu, Sn and Pb  

E-Print Network (OSTI)

The cross sections of forward emission of one, two and three neutrons by 158A GeV 115In nuclei in collisions with Al, Cu, Sn and Pb targets are reported. The measurements were performed in the framework of the ALICE-LUMI experiment at the SPS facility at CERN. Various corrections accounting for the absorption of beam nuclei and produced neutrons in target material and surrounding air were introduced. The corrected cross section data are compared with the predictions of the RELDIS model for electromagnetic fragmentation of 115In in ultraperipheral collisions, as well as with the results of the abrasion-ablation model for neutron emission in hadronic interactions. The measured neutron emission cross sections well agree with the RELDIS results, with the exception of In-Al collisions where the measured cross sections are larger compared to RELDIS. This is attributed to a relatively large contribution of hadronic fragmentation of In on Al target with respect to electromagnetic fragmentation, on the contrary to similar measurements performed earlier with 30A GeV 208Pb colliding with Al.

E. V. Karpechev; I. A. Pshenichnov; T. L. Karavicheva; A. B. Kurepin; M. B. Golubeva; F. F. Gub