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1

arXiv.org help - Why Submit the TeX/LaTeX Source?  

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

abshep-th9511053). TeX source is more compact and space-efficient. Frequent Red Herring Concerns: Will the auto-TeXing embed figures? Yes. Our TeX installation can do...

2

The TE Wave Transmission Method for Electron Cloud Measurements at Cesr-TA  

E-Print Network (OSTI)

CBP-836 THE TE WAVE TRANSMISSION METHOD FOR ELECTRON CLOUDobtained using the TE transmission technique described inBesides the TE transmission method in its initial

Desantis, S.

2010-01-01T23:59:59.000Z

3

Energy Sources for Yotta-TeV Iceberg Showers  

Science Conference Proceedings (OSTI)

In late February of 2002, warming climate along the Antarctic Peninsula triggered a macroscopic particle acceleration event that smashed a 350 Gkg floating ice shelf, called the Larsen B. The particle shower released by the acceleration involved on the order of >10^6 iceberg particles accelerated to an aggregate total kinetic energy of ~10^17 J (100 Mt TNT equivalent). The explosion was so extreme that it caught glaciological science by surprise (an injury to the egos of glaciologists worldwide) and caused glaciers of the Antarctic Peninsula formerly buttressed by the missing ice shelf to surge (yielding a small increment to sea level rise). In this presentation, I shall describe research, both experimental and field oriented, that has revealed the energy source for this explosive event. I shall also describe how climate warming has the capacity to trigger this type of ice-shelf collapse. A review of the geologic record of ice-rafted debris on the ocean floor suggests that extreme, explosive ice-shelf collapse may be a ubiquitous catastrophe that has happened regularly in the past as part of glacial/interglacial climate cycles.

MacAyeal, Douglas [University of Chicago

2013-05-01T23:59:59.000Z

4

TeV Scale Quantum Gravity and Mirror Supernovae as Sources of Gamma Ray Bursts  

E-Print Network (OSTI)

Mirror matter models have been suggested recently as an explanation of neutrino puzzles and microlensing anomalies. We show that mirror supernovae can be a copious source of energetic gamma rays if one assumes that the quantum gravity scale is in the TeV range. We show that under certain assumptions plausible in the mirror models, the gamma energies could be degraded to the 10 MeV range (and perhaps even further) so as to provide an explanation of observed gamma ray bursts. This mechanism for the origin of the gamma ray bursts has the advantage that it neatly avoids the ``baryon load problem''.

R. N. Mohapatra; S. Nussinov; V. L. Teplitz

1999-09-22T23:59:59.000Z

5

Exploring the powering source of the TeV X-ray binary LS 5039  

E-Print Network (OSTI)

LS 5039 is one of the four TeV emitting X-ray binaries detected up to now. The powering source of its multi-wavelength emission can be accretion in a microquasar scenario or wind interaction in a young non-accreting pulsar scenario. These two scenarios predict different morphologic and peak position changes along the orbital cycle of 3.9 days, which can be tested at milliarcsecond scales using VLBI techniques. Here we present a campaign of 5 GHz VLBA observations conducted in June 2000 (2 runs five days apart). The results show a core component with a constant flux density, and a fast change in the morphology and the position angle of the elongated extended emission, but maintaining a stable flux density. These results are difficult to fit comfortably within a microquasar scenario, whereas they appear to be compatible with the predicted behavior for a non-accreting pulsar.

J. Moldon; M. Ribo; Josep M. Paredes; J. Marti; M. Massi

2008-12-04T23:59:59.000Z

6

BLAZARS AS ULTRA-HIGH-ENERGY COSMIC-RAY SOURCES: IMPLICATIONS FOR TeV GAMMA-RAY OBSERVATIONS  

Science Conference Proceedings (OSTI)

The spectra of BL Lac objects and Fanaroff-Riley I radio galaxies are commonly explained by the one-zone leptonic synchrotron self-Compton (SSC) model. Spectral modeling of correlated multiwavelength data gives the comoving magnetic field strength, the bulk outflow Lorentz factor, and the emission region size. Assuming the validity of the SSC model, the Hillas condition shows that only in rare cases such sources accelerate protons to much above 10{sup 19} eV, so {approx}> 10{sup 20} eV ultra-high-energy cosmic rays (UHECRs) are likely to be heavy ions if powered by this type of radio-loud active galactic nuclei (AGNs). Survival of nuclei is shown to be possible in TeV BL Lacs and misaligned counterparts with weak photohadronic emissions. Another signature of hadronic production is intergalactic UHECR-induced cascade emission, which is an alternative explanation of the TeV spectra of some extreme non-variable blazars such as 1ES 0229+200 or 1ES 1101-232. We study this kind of cascade signal, taking into account effects of the structured extragalactic magnetic fields in which the sources should be embedded. We demonstrate the importance of cosmic-ray deflections on the {gamma}-ray flux, and show that required absolute cosmic-ray luminosities are larger than the average UHECR luminosity inferred from UHECR observations and can even be comparable to the Eddington luminosity of supermassive black holes. Future TeV {gamma}-ray observations using the Cerenkov Telescope Array and the High Altitude Water Cerenkov detector array can test for UHECR acceleration by observing >25 TeV photons from relatively low redshift sources such as 1ES 0229+200, and {approx}>TeV photons from more distant radio-loud AGNs.

Murase, Kohta [Department of Physics, Center for Cosmology and Astro-Particle Physics, Ohio State University, Columbus, OH 43210 (United States); Dermer, Charles D. [Space Science Division, Naval Research Laboratory, Washington, DC 20375 (United States); Takami, Hajime [Max Planck Institute for Physics, Foehringer Ring 6, 80805 Munich (Germany); Migliori, Giulia [Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)

2012-04-10T23:59:59.000Z

7

Deep radio images of the HEGRA and Whipple TeV sources in the Cygnus OB2 region  

E-Print Network (OSTI)

Context. The modern generation of Cherenkov telescopes has revealed a new population of gamma-ray sources in the Galaxy. Some of them have been identified with previously known X-ray binary systems while other remain without clear counterparts a lower energies. Our initial goal here was reporting on extensive radio observations of the first extended and yet unidentified source, namely TeV J2032+4130. This object was originally detected by the HEGRA telescope in the direction of the Cygnus OB2 region and its nature has been a matter of debate during the latest years. Aims. We aim to pursue our radio exploration of the TeV J2032+4130 position that we initiated in a previous paper but taking now into account the latest results from new Whipple and MILAGRO TeV telescopes. Methods. Our investigation is mostly based on interferometric radio observations with the Giant Metre Wave Radio Telescope (GMRT) close to Pune (India) and the Very Large Array (VLA) in New Mexico (USA). We also conducted near infrared observati...

Marti, Josep; Ishwara Chandra C H; Bosch-Ramon, Valenti

2007-01-01T23:59:59.000Z

8

Sensitivity of the High Altitude Water Cherenkov Detector to Sources of Multi-TeV Gamma Rays  

E-Print Network (OSTI)

The High Altitude Water Cherenkov (HAWC) observatory is an array of large water Cherenkov detectors sensitive to gamma rays and hadronic cosmic rays in the energy band between 100 GeV and 100 TeV. The observatory will be used to measure high-energy protons and cosmic rays via detection of the energetic secondary particles reaching the ground when one of these particles interacts in the atmosphere above the detector. HAWC is under construction at a site 4100 meters above sea level on the northern slope of the volcano Sierra Negra, which is located in central Mexico at 19 degrees N latitude. It is scheduled for completion in 2014. In this paper we estimate the sensitivity of the HAWC instrument to point-like and extended sources of gamma rays. The source fluxes are modeled using both unbroken power laws and power laws with exponential cutoffs. HAWC, in one year, is sensitive to point sources with integral power-law spectra as low as 5x10^-13 cm^-2 sec^-1 above 2 TeV (approximately 50 mCrab) over 5 sr of the sky...

Abeysekara, A U; Alvarez, C; Álvarez, J D; Arceo, R; Arteaga-Velázquez, J C; Solares, H A Ayala; Barber, A S; Baughman, B M; Bautista-Elivar, N; Belmont, E; BenZvi, S Y; Berley, D; Rosales, M Bonilla; Braun, J; Caballero-Lopez, R A; Carramiñana, A; Castillo, M; Cotti, U; Cotzomi, J; de la Fuente, E; De León, C; DeYoung, T; Hernandez, R Diaz; Diaz-Velez, J C; Dingus, B L; DuVernois, M A; Ellsworth, R W; Fernandez, A; Fiorino, D W; Fraija, N; Galindo, A; Garcia-Luna, J L; Garcia-Torales, G; Garfias, F; González, L X; González, M M; Goodman, J A; Grabski, V; Gussert, M; Hampel-Arias, Z; Hui, C M; Hüntemeyer, P; Imran, A; Iriarte, A; Karn, P; Kieda, D; Kunde, G J; Lara, A; Lauer, R J; Lee, W H; Lennarz, D; Vargas, H León; Linares, E C; Linnemann, J T; Longo, M; Luna-Garc\\'\\ia, R; Marinelli, A; Martinez, O; Mart\\'\\inez-Castro, J; Matthews, J A J; Miranda-Romagnoli, P; Moreno, E; Mostafá, M; Nava, J; Nellen, L; Newbold, M; Noriega-Papaqui, R; Oceguera-Becerra, T; Patricelli, B; Pelayo, R; Pérez-Pérez, E G; Pretz, J; Rivière, C; Rosa-González, D; Salazar, H; Salesa, F; Sandoval, A; Santos, E; Schneider, M; Silich, S; Sinnis, G; Smith, A J; Sparks, K; Springer, R W; Taboada, I; Toale, P A; Tollefson, K; Torres, I; Ukwatta, T N; Villaseñor, L; Weisgarber, T; Westerhoff, S; Wisher, I G; Wood, J; Yodh, G B; Younk, P W; Zaborov, D; Zepeda, A; Zhou, H

2013-01-01T23:59:59.000Z

9

Activity Book TA Orientation  

E-Print Network (OSTI)

Activity Book TA Orientation School of Physics and Astronomy, University of Minnesota Fall, 2004 Student Laboratory Reports 195 Homework #8. Judging Problems 211 #12;TA Orientation 2004 Activity 1: UMn: _______________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ #12;TA Orientation 2004 Activity 1 (continued) Page 2 University of Minnesota Model for Teaching

Minnesota, University of

10

Activity Book TA Orientation  

E-Print Network (OSTI)

Activity Book TA Orientation School of Physics and Astronomy University of Minnesota Fall, 2005 #12 of Example Student Laboratory Reports 181 #12;#12;TA Orientation 2005 Activity 1: UMn Model for Introductory: _______________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ _____________________________________________________________________________ #12;TA Orientation 2005 Activity 1 (continued) Page 2 Notes

Minnesota, University of

11

Charting the TeV Milky Way: H.E.S.S. Galactic plane survey maps, catalog and source populations  

E-Print Network (OSTI)

Very-high-energy (VHE, E>100 GeV) gamma-rays provide a unique view of the non-thermal universe, tracing the most violent and energetic phenomena at work inside our Galaxy and beyond. The latest results of the H.E.S.S. Galactic Plane Survey (HGPS) undertaken by the High Energy Stereoscopic System (H.E.S.S.), an array of four imaging atmospheric Cherenkov telescopes located in Namibia, are described here. The HGPS aims at the detection of cosmic accelerators with environments suitable for the production of photons at the highest energies and has led to the discovery of an unexpectedly large and diverse population of over 60 sources of TeV gamma rays within its current range of l = 250 to 65 degrees in longitude and |b|<3.5 degrees in latitude. The data set of the HGPS comprises 2800 hours of high-quality data, taken in the years 2004 to 2013. The sensitivity for the detection of point-like sources, assuming a power-law spectrum with a spectral index of 2.3 at a statistical significance of 5 sigma, is now at ...

Carrigan, S; Chaves, R C G; Deil, C; Gast, H

2013-01-01T23:59:59.000Z

12

The experimental search for point sources above 1 TeV  

Science Conference Proceedings (OSTI)

The search for point sources of VHE and UHE radiation is an exciting new field which bridges Astrophysics and High Energy physics. This paper describes three experiments to study this radiation: The first is the CYGNUS experiment in Los Alamos which has been operational since 1986 and is sensitive to the electromagnetic and muonic component of extensive air showers above 5×101 3 eV. The second is the proposed GRANDE detector which will be capable of detecting all components of extensive air showers above 101 3 eV and detecting upward coming muons from neutrino induced events in the rock below it. An third a new experiment

J. A. Goodman; The GRANDE Collaboration; The CYGNUS Collaboration

1990-01-01T23:59:59.000Z

13

TA-21 Cleanup Project  

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

of schedule Technical Area 21 (TA-21) was one of the early sites of Manhattan Project and Cold War-era work at the Laboratory. The location of the world's first plutonium...

14

TA Orientation 2005 Activity #3 TA Orientation 2005 Activity #3 (continued)  

E-Print Network (OSTI)

TA Orientation 2005 Activity #3 Page 15 #12;TA Orientation 2005 Activity #3 (continued) Page 16 #12;TA Orientation 2005 Activity #3 (continued) Page 17 #12;TA Orientation 2005 Activity #3 (continued) Page 18 #12;TA Orientation 2005 Activity #3 (continued) Page 19 #12;TA Orientation 2005 Activity #3

Minnesota, University of

15

ALTERNATING URRENT PHOTOVOLTAI UILDING LO K TE HNOLOGY ...  

Solar Energy Generation Energy Storage Power Sources Satellites TE HNOLOGI AL ENEFITS module technologies Eliminates D voltage concerns

16

Thin Metal Oxide Films to Modify a Window Layer in CdTe-Based Solar Cells for Improved Performance  

Science Conference Proceedings (OSTI)

We report on CdS/CdTe photovoltaic devices that contain a thin Ta2O5 film deposited onto the CdS window layer by sputtering. We show that for thicknesses below 5 nm, Ta2O5 films between CdS and CdTe positively affect the solar cell performance, improving JSC, VOC, and the cell power conversion efficiency despite the insulating nature of the interlayer material. Using the Ta2O5 interlayer, a VOC gain of over 100 mV was demonstrated compared to a CdTe/CdS baseline. Application of a 1nm Ta2O5 interlayer enabled the fabrication of CdTe solar cells with extremely thin (less than 30 nm) CdS window layers. The efficiency of these cells exceeded that of a base line cell with 95 nm of CdS.

Lemmon, John P.; Polikarpov, Evgueni; Bennett, Wendy D.; Kovarik, Libor

2012-05-05T23:59:59.000Z

17

TA Orientation 2007 Activity #3 Lab Preparation  

E-Print Network (OSTI)

TA Orientation 2007 Activity #3 Lab Preparation Activity 3 - Page 1 Preparation for Teaching a Lab, based on the papers of these 6 students. #12;TA Orientation 2007 Activity #3 Lab Preparation Activity 3 - Page 2 #12;TA Orientation 2007 Activity #3 Lab Preparation Activity 3 - Page 3 Warm-up Questions

Minnesota, University of

18

TA Orientation 2004 Activity #13 (2 points)  

E-Print Network (OSTI)

TA Orientation 2004 Activity #13 (2 points) Page 113 What Questions Would You Ask? Last year and equations on the board. Group #1 Group 2 #12;TA Orientation 2004 Activity 13 (continued) Page 114 Group 3 will be randomly collected from each group for grading. #12;TA Orientation 2004 Manager

Minnesota, University of

19

TA Orientation 2006 Activity #3 Lab Preparation  

E-Print Network (OSTI)

TA Orientation 2006 Activity #3 Lab Preparation Activity 3 ­ Page 1 Preparation for Teaching a Lab, based on the papers of these 6 students. #12;TA Orientation 2006 Activity #3 Lab Preparation Activity 3 ­ Page 2 #12;TA Orientation 2006 Activity #3 Lab Preparation Activity 3 ­ Page 3 Warm-up Questions

Minnesota, University of

20

TA Orientation 2004 Activity 4. Rationale for UMN Model  

E-Print Network (OSTI)

TA Orientation 2004 Activity 4. Rationale for UMN Model #12;TA Orientation 2004 Activity 4 (continued) #12;TA Orientation 2004 Activity 4 (continued) Page 45 #12;TA Orientation 2004 Activity 4 (continued) Page 46 #12;TA Orientation 2004 Activity 4 (continued) Page 47 #12;TA Orientation 2004 Activity 4

Minnesota, University of

Note: This page contains sample records for the topic "ta te source" 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

TA-55: LANL Plutonium-Processing Facilities  

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

TA-55: LANL Plutonium-Processing Facilities TA-55: LANL Plutonium-Processing Facilities TA-55: LANL Plutonium-Processing Facilities TA-55 supports a wide range of national security programs that involve stockpile stewardship, plutonium processing, nuclear materials stabilization, materials disposition, nuclear forensics, nuclear counter-terrorism, and nuclear energy. ...the only fully operational, full capability plutonium facility in the nation. National Security At the Los Alamos National Laboratory (LANL), virtually all plutonium operations occur within the Plutonium Facility at Technical Area 55 (TA-55). TA-55 is the nation's most modern plutonium science and manufacturing facility, and it is the only fully operational, full capability plutonium facility in the nation. Thus, TA-55 supports a wide

22

TE HNOLOGY SUMMARY  

nano oral™ high surfa e area platinum atalysts to improve fuel ell effi ien y te hnology summary te hnology readiness level: 4 key elements have een demonstrated ...

23

Sources  

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

SOURCES Microsoft Corporation. "Gasohol," Microsoft Encarta Online Encyclopedia 2001, http:encarta.msn.com. U.S. Department of Transportation, Federal Highway Administration, A...

24

CdSxTe1-x Alloying in CdS/CdTe Solar Cells  

DOE Green Energy (OSTI)

A CdSxTe1-x layer forms by interdiffusion of CdS and CdTe during the fabrication of thin-film CdTe photovoltaic (PV) devices. The CdSxTe1-x layer is thought to be important because it relieves strain at the CdS/CdTe interface that would otherwise exist due to the 10% lattice mismatch between these two materials. Our previous work [1] has indicated that the electrical junction is located in this interdiffused CdSxTe1-x region. Further understanding, however, is essential to predict the role of this CdSxTe1-x layer in the operation of CdS/CdTe devices. In this study, CdSxTe1-x alloy films were deposited by RF magnetron sputtering and co-evaporation from CdTe and CdS sources. Both radio-frequency-magnetron-sputtered and co-evaporated CdSxTe1-x films of lower S content (x<0.3) have a cubic zincblende (ZB) structure akin to CdTe, while those of higher S content have a hexagonal wurtzite (WZ) structure like that of CdS. Films become less preferentially oriented as a result of a CdCl2 heat treatment at ~400 degrees C for 5 min. Films sputtered in a 1% O2/Ar ambient are amorphous as deposited, but show CdTe ZB, CdS WZ, and CdTe oxide phases after a CdCl2 heat treatment (HT). Films sputtered in O2 partial pressure have a much wider bandgap (BG) than expected. This may be explained by nanocrystalline size effects seen previously [2] for sputtered oxygenated CdS (CdS:O) films.

Duenow, J. N.; Dhere, R. G.; Moutinho, H. R.; To, B.; Pankow, J. W.; Kuciauskas, D.; Gessert, T. A.

2011-05-01T23:59:59.000Z

25

EA-1407: Proposed TA-16 Engineering Complex Refurbishment and...  

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

07: Proposed TA-16 Engineering Complex Refurbishment and Consolidation at Los Alamos National Laboratory, Los Alamos, New Mexico EA-1407: Proposed TA-16 Engineering Complex...

26

CRAD, Emergency Management - Los Alamos National Laboratory TA...  

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

Emergency Management - Los Alamos National Laboratory TA 55 SST Facility CRAD, Emergency Management - Los Alamos National Laboratory TA 55 SST Facility June 2005 A section of...

27

IMPROVEMENT OF CdMnTe DETECTOR PERFORMANCE BY MnTe PURIFICATION  

Science Conference Proceedings (OSTI)

Residual impurities in manganese (Mn) are a big obstacle to obtaining high-performance CdMnTe (CMT) X-ray and gamma-ray detectors. Generally, the zone-refining method is an effective way to improve the material's purity. In this work, we purified the MnTe compounds combining the zone-refining method with molten Te, which has a very high solubility for most impurities. We confirmed the improved purity of the material by glow-discharge mass spectrometry (GDMS). We also found that CMT crystals from a multiply-refined MnTe source, grown by the vertical Bridgman method, yielded better performing detectors.

Kim, K.H.; Bolotnikov, A.E.; Camarda, G.S.; Tappero, R.; Hossain, A.; Cui, Y.; Yang, G.; Gul, R.; and James, R.B.

2011-04-25T23:59:59.000Z

28

Locating TeV Gamma-Ray Sources with Sub-Arcminute Precision: the Pointing Calibration of the HEGRA System of Imaging Atmospheric Cherenkov Telescopes  

E-Print Network (OSTI)

Stereoscopic viewing of TeV gamma-ray air showers with systems of Imaging Atmospheric Cherenkov Telescopes (IACTs) allows to reconstruct the origin of individual primary particles with an accuracy of 0.1 degree or better. The shower impact point can be determined within 15 meters. To actually achieve this resolution, the pointing of the telescopes of an IACT system needs to be controlled with high precision. For the HEGRA IACT system, a procedure to calibrate telescope pointing was established, using bright stars distributed over the sky as references. On the basis of these measurements, one determines parameters of a correction function which is valid for the complete hemisphere. After correction a pointing accuracy of 0.01 degree is achieved.

G. Puehlhofer; A. Daum; G. Hermann; M. Hess; W. Hofmann; C. Koehler; M. Panter

1998-01-12T23:59:59.000Z

29

AOCS Official Method Ta 1e-70  

Science Conference Proceedings (OSTI)

Sampling of Dibasic Acids AOCS Official Method Ta 1e-70 Methods Downloads Methods Downloads DEFINITION The method covers representative sampling of dibasic acids derived from the fatty series of organic compounds

30

AOCS Official Method Ta 1-09  

Science Conference Proceedings (OSTI)

Sampling of Industrial Oils and Derivatives AOCS Official Method Ta 1-09 Methods Downloads Methods Downloads DEFINITION This method covers the procedure for obtaining representative samples of industrial oils and

31

TA Orientation 2005 Activity 6 Problem Solving: Cowboy Bob Problem  

E-Print Network (OSTI)

TA Orientation 2005 Activity 6 Problem Solving: Cowboy Bob Problem Page 61 Below is a problem from the outlaws. #12;TA Orientation 2005 Activity 6 (continued) Page 62 Notes: #12;TA Orientation 2005 Activity 7. #12;TA Orientation 2005 Activity 7 (continued) Page 64 Answer Sheet for Activity 7 1. Examine your

Minnesota, University of

32

TE HNOLOGY SUMMARY  

owned subsidiary of Lockheed Martin Corporation, for the U.S. Department of Energy’s National Nuclear Security Administration. SAND # 2011-7007P TE HNOLOGY INQUIRY?

33

LaTaT: language and text analysis tools  

Science Conference Proceedings (OSTI)

LaTaT is a Language and Text Analysis Toolset. This paper gives a brief description of the components comprising LaTaT, including a Minimalist parser and language and concept learning programs.

Dekang Lin

2001-03-01T23:59:59.000Z

34

TA Orientation 2004 Name: . Activity #2a (1 point)  

E-Print Network (OSTI)

TA Orientation 2004 Name: . Activity #2a (1 point) Page 7 EXPLORATORY PROBLEM #1: Light Patterns shade); and a large white cardboard screen (representing the side of the building). #12;TA Orientation would see on the screen. #12;TA Orientation 2004 Activity #2a (continued) Page 9 Why did you draw what

Minnesota, University of

35

TA Orientation 2006 Activity #2 Expert-Novice Differences  

E-Print Network (OSTI)

TA Orientation 2006 Activity #2 Expert-Novice Differences Activity 2 - Page 1 Differences in Expert group's answers to the questions. PRODUCT: Activity#2 Answer Sheet. #12;TA Orientation 2006 Activity #2 with the boulder. Determine how fast Bob will have to roll the boulder to reach the outlaws. #12;TA Orientation

Minnesota, University of

36

TA Orientation 2007 Activity #2 Expert-Novice Differences  

E-Print Network (OSTI)

TA Orientation 2007 Activity #2 Expert-Novice Differences Activity 2 - Page 1 Differences in Expert group's answers to the questions. PRODUCT: Activity #2 Answer Sheet. #12;TA Orientation 2007 Activity #2 with the boulder. Determine how fast Bob will have to roll the boulder to reach the outlaws. #12;TA Orientation

Minnesota, University of

37

TA Orientation 2007 Activity #6 Coaching During Discussion Sessions  

E-Print Network (OSTI)

TA Orientation 2007 Activity #6 Coaching During Discussion Sessions Activity 6 - Page 1 Coaching to these questions with your peers during TA Orientation. NOTE: These partial student solutions were actually taken. #12;TA Orientation 2007 Activity #6 Coaching During Discussion Sessions Activity 6 - Page 2 Problem

Minnesota, University of

38

TA Orientation 2004 Manager: _______________________ Activity 3a (2 points) Recorder: _______________________  

E-Print Network (OSTI)

TA Orientation 2004 Manager: _______________________ Activity 3a (2 points) Recorder to the questions. Group Product: Activity #2 Answer Sheets. #12;TA Orientation 2004 Activity 3a (continued) Page 26 of these "alternative conceptions" were successfully addressed by instruction? Which were not? #12;TA Orientation 2004

Minnesota, University of

39

TA Orientation 2004 Activity #12: Why CPS May Not Work  

E-Print Network (OSTI)

TA Orientation 2004 Activity #12: Why CPS May Not Work Page 105 2 Why Group Problem Solving May arrived at, can be understood and appreciated by all group members. #12;TA Orientation 2004 Activity 12 by copying a pattern. #12;TA Orientation 2004 Activity 12 (continued) Page 107 5 3. The task problem must

Minnesota, University of

40

TA Orientation 2006 Activity #6 Coaching During Discussion Sessions  

E-Print Network (OSTI)

TA Orientation 2006 Activity #6 Coaching During Discussion Sessions Activity 6 - Page 1 Coaching to these questions with your peers during TA Orientation. NOTE: These partial student solutions were actually taken. #12;TA Orientation 2006 Activity #6 Coaching During Discussion Sessions Activity 6 - Page 2 Problem

Minnesota, University of

Note: This page contains sample records for the topic "ta te source" 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

Molten Salt Multi-anode Reactive Alloy Coating(MARC) of Ta-W ...  

Science Conference Proceedings (OSTI)

In this study, Ta-W coated samples (Ta-7.31W, Ta-4.12W and Ta-1.92W) were prepared by multi-anode reactive alloy coating (MARC) process in molten salt ...

42

The half-life of {sup 131g,m}Te  

SciTech Connect

In this work, the half-lives of {sup 131m}Te and {sup 131g}Te were measured. Radioactive sources of {sup 131}Te were obtained using the {sup 130}Te(n,{gamma}){sup 131}Te nuclear reaction. These nuclear parameters have been determined with a better confidence and accuracy than previously available: 18.89 {+-} 0.11 min and 33.18 {+-} 0.13 h, respectively. These results are quite helpful for new calculations that attempt to describe the low-lying levels in {sup 131}I from the decay of {sup 131g,m}Te.

Ruivo, J. C.; Zamboni, C. B. [Instituto de Pesquisas Energeticas e Nucleares (IPEN / CNEN - SP) Av. Professor Lineu Prestes 2242 05508-000 Sao Paulo, SP (Brazil); Oliveira, J. R. B. [Instituto de Fisica da Universidade de Sao Paulo, Brazil Travessa R da Rua do Matao 187 05508-090 Sao Paulo, SP (Brazil); Heder Medina, Nilberto

2013-05-06T23:59:59.000Z

43

TA Orientation 2004 Activity 14a. Good and Bad Writing: Expanding Our Vocabulary  

E-Print Network (OSTI)

TA Orientation 2004 Activity 14a. Good and Bad Writing: Expanding Our Vocabulary Page 117 TA Orientation, Fall 2003TA Orientation, Fall 2003 Evaluating Laboratory Reports forEvaluating Laboratory Reports;TA Orientation 2004 Activity 14a (continued) Page 118 TA Orientation, Fall 2003TA Orientation, Fall

Minnesota, University of

44

CdTe portfolio offers commercial ready high efficiency solar ...  

This characteristic is due partly to the single-phase nature of the absorber layer and the ease with which the CdTe source ... Wind Energy; Partners (27) Visual ...

45

INTEGRAL observations of TeV plerions  

E-Print Network (OSTI)

Amongst the sources seen in very high gamma-rays several are associated with Pulsar Wind Nebulae (``TeV plerions''). The study of hard X-ray/soft gamma-ray emission is providing an important insight into the energetic particle population present in these objects. The unpulsed emission from pulsar/pulsar wind nebula systems in the energy range accessible to the INTEGRAL satellite is mainly synchrotron emission from energetic and fast cooling electrons close to their acceleration site. Our analyses of public INTEGRAL data of known TeV plerions detected by ground based Cherenkov telescopes indicate a deeper link between these TeV plerions and INTEGRAL detected pulsar wind nebulae. The newly discovered TeV plerion in the northern wing of the Kookaburra region (G313.3+0.6 powered by the middle aged PSR J1420-6048) is found to have a previously unknown INTEGRAL counterpart which is besides the Vela pulsar the only middle aged pulsar detected with INTEGRAL. We do not find an INTEGRAL counterpart of the TeV plerion associated with the X-ray PWN ``Rabbit'' G313.3+0.1 which is possibly powered by a young pulsar.

A. I. D. Hoffmann; D. Horns; A. Santangelo

2006-09-14T23:59:59.000Z

46

CRAD, Configuration Management - Los Alamos National Laboratory TA 55 SST  

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

Configuration Management - Los Alamos National Laboratory TA Configuration Management - Los Alamos National Laboratory TA 55 SST Facility CRAD, Configuration Management - Los Alamos National Laboratory TA 55 SST Facility June 2005 A section of Appendix C to DOE G 226.1-2 "Federal Line Management Oversight of Department of Energy Nuclear Facilities." Consists of Criteria Review and Approach Documents (CRADs) used for an assessment of the Configuration Management program at the Los Alamos National Laboratory, TA 55 SST Facility. CRADs provide a recommended approach and the types of information to gather to assess elements of a DOE contractor's programs. CRAD, Configuration Management - Los Alamos National Laboratory TA 55 SST Facility More Documents & Publications CRAD, Emergency Management - Los Alamos National Laboratory TA 55 SST

47

CRAD, Emergency Management - Los Alamos National Laboratory TA 55 SST  

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

Emergency Management - Los Alamos National Laboratory TA 55 Emergency Management - Los Alamos National Laboratory TA 55 SST Facility CRAD, Emergency Management - Los Alamos National Laboratory TA 55 SST Facility June 2005 A section of Appendix C to DOE G 226.1-2 "Federal Line Management Oversight of Department of Energy Nuclear Facilities." Consists of Criteria Review and Approach Documents (CRADs) used for an assessment of the Emergency Management program at the Los Alamos National Laboratory TA 55 SST Facility. CRADs provide a recommended approach and the types of information to gather to assess elements of a DOE contractor's programs. CRAD, Emergency Management - Los Alamos National Laboratory TA 55 SST Facility More Documents & Publications CRAD, Conduct of Operations - Los Alamos National Laboratory TA 55 SST

48

CRAD, Criticality Safety - Los Alamos National Laboratory TA 55 SST  

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

Criticality Safety - Los Alamos National Laboratory TA 55 SST Criticality Safety - Los Alamos National Laboratory TA 55 SST Facility CRAD, Criticality Safety - Los Alamos National Laboratory TA 55 SST Facility June 2005 A section of Appendix C to DOE G 226.1-2 "Federal Line Management Oversight of Department of Energy Nuclear Facilities." Consists of Criteria Review and Approach Documents (CRADs) used for an assessment of the Criticality Safety program at the Los Alamos National Laboratory, TA 55 SST Facility. CRADs provide a recommended approach and the types of information to gather to assess elements of a DOE contractor's programs. CRAD, Criticality Safety - Los Alamos National Laboratory TA 55 SST Facility More Documents & Publications CRAD, Configuration Management - Los Alamos National Laboratory TA 55 SST

49

CRAD, Maintenance - Los Alamos National Laboratory TA 55 SST Facility |  

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

Los Alamos National Laboratory TA 55 SST Los Alamos National Laboratory TA 55 SST Facility CRAD, Maintenance - Los Alamos National Laboratory TA 55 SST Facility A section of Appendix C to DOE G 226.1-2 "Federal Line Management Oversight of Department of Energy Nuclear Facilities." Consists of Criteria Review and Approach Documents (CRADs) used for an assessment of the Maintenance program at the Los Alamos National Laboratory TA 55 SST Facility. CRADs provide a recommended approach and the types of information to gather to assess elements of a DOE contractor's programs. CRAD, Maintenance - Los Alamos National Laboratory TA 55 SST Facility More Documents & Publications CRAD, Maintenance - Los Alamos National Laboratory Waste Characterization, Reduction, and Repackaging Facility CRAD, Configuration Management - Los Alamos National Laboratory TA 55 SST

50

TA-2 Water Boiler Reactor Decommissioning Project  

Science Conference Proceedings (OSTI)

This final report addresses the Phase 2 decommissioning of the Water Boiler Reactor, biological shield, other components within the biological shield, and piping pits in the floor of the reactor building. External structures and underground piping associated with the gaseous effluent (stack) line from Technical Area 2 (TA-2) Water Boiler Reactor were removed in 1985--1986 as Phase 1 of reactor decommissioning. The cost of Phase 2 was approximately $623K. The decommissioning operation produced 173 m{sup 3} of low-level solid radioactive waste and 35 m{sup 3} of mixed waste. 15 refs., 25 figs., 3 tabs.

Durbin, M.E. (ed.); Montoya, G.M.

1991-06-01T23:59:59.000Z

51

TA Orientation 2005 Activity 14 Evaluating Sample Laboratory Report from Laboratory Manual  

E-Print Network (OSTI)

TA Orientation 2005 Activity 14 Page 101 Evaluating Sample Laboratory Report from Laboratory Manual: 45 minutes. #12;TA Orientation 2005 Activity 14 (continued) Page 102 #12;TA Orientation 2005 Activity 14 (continued) Page 103 #12;TA Orientation 2005 Activity 14 (continued) Page 104 #12;TA Orientation

Minnesota, University of

52

TA Orientation 2004 Activity 15a. How to Grade Student Laboratory Reports  

E-Print Network (OSTI)

TA Orientation 2004 Activity 15a. How to Grade Student Laboratory Reports Page 145 How to Grade along closely. #12;TA Orientation 2004 Activity 15a (continued) #12;TA Orientation 2004 Activity 15a (continued) #12;TA Orientation 2004 Activity 15a (continued) #12;TA Orientation 2004 Activity 15a (continued

Minnesota, University of

53

CdS/CdTe Solar Cells Containing Directly Deposited CdSxTe1-x Alloy Layers: Preprint  

DOE Green Energy (OSTI)

A CdSxTe1-x layer forms by interdiffusion of CdS and CdTe during the fabrication of thin-film CdTe photovoltaic (PV) devices. The CdSxTe1-x layer is thought to be important because it relieves strain at the CdS/CdTe interface that would otherwise exist due to the 10% lattice mismatch between these two materials. Our previous work [1] has indicated that the electrical junction is located in this interdiffused CdSxTe1-x region. Further understanding, however, is essential to predict the role of this CdSxTe1-x layer in the operation of CdS/CdTe devices. In this study, CdSxTe1-x alloy films were deposited by radio-frequency (RF) magnetron sputtering and co-evaporation from CdTe and CdS sources. Both RF-magnetron-sputtered and co-evaporated CdSxTe1-x films of lower S content (x<0.3) have a cubic zincblende (ZB) structure akin to CdTe, whereas those of higher S content have a hexagonal wurtzite (WZ) structure like that of CdS. Films become less preferentially oriented as a result of a CdCl2 heat treatment (HT) at ~400 degrees C for 5 min. Films sputtered in a 1% O2/Ar ambient are amorphous as deposited, but show CdTe ZB, CdS WZ, and CdTe oxide phases after a CdCl2 HT. Films sputtered in O2 partial pressure have a much wider bandgap than expected. This may be explained by nanocrystalline size effects seen previously [2] for sputtered oxygenated CdS (CdS:O) films. Initial PV device results show that the introduction of a directly-deposited CdSxTe1-x alloy layer into the device structure produces devices of comparable performance to those without the alloy layer when a CdCl2 HT is performed. Further investigation is required to determine whether the CdCl2 heat treatment step can be altered or eliminated through direct deposition of the alloy layer.

Duenow, J. N.; Dhere, R. G.; Moutinho, H. R.; To, B.; Pankow, J. W.; Kuciauskas, D.; Gessert, T. A.

2011-07-01T23:59:59.000Z

54

TA Orientation 2007 Activity #7 Facilitating an End Discussion  

E-Print Network (OSTI)

TA Orientation 2007 Activity #7 Facilitating an End Discussion Activity 7 - Page 1 Facilitating Orientation. NOTE: These partial student solutions were actually taken from individual solutions to a 1201 it is similar to most group problems given in discussion sessions. #12;TA Orientation 2007 Activity #7

Minnesota, University of

55

TA Orientation 2006 Activity #7 Facilitating an End Discussion  

E-Print Network (OSTI)

TA Orientation 2006 Activity #7 Facilitating an End Discussion Activity 7 - Page 1 Facilitating Orientation. NOTE: These partial student solutions were actually taken from individual solutions to a 1201 it is similar to most group problems given in discussion sessions. #12;TA Orientation 2006 Activity #7

Minnesota, University of

56

Preparation, characterization of the Ta-doped ZnO nanoparticles and their photocatalytic activity under visible-light illumination  

SciTech Connect

This paper describes a novel catalyst of the Ta-doped ZnO nanocrystals prepared by a modified polymerizable complex method using the water-soluble tantalum precursor as the sources of Ta. The catalysts were characterized by means of various analytical techniques as a function of Ta content (x=0-4 mol%) systematically. A remarkable advantage of the results was confirmed that dopant Ta enhanced the visible-light absorption of ZnO and the low-solubility tantalum doping could restrain the growth of crystal and minish the particle size. The relationship between the physicochemical property and the photocatalytic performance was discussed, and it was found that the photocatalytic activity in the photochemical degradation of methylene blue under visible-light irradiation (lambda>=420 nm) was dependent on the contents of the dopant, which could affect the particle size, concentration of surface hydroxyl groups and active hydrogen-related defect sites, and the visible-light absorption. The highest photocatalytic activity was obtained for the 1.0 mol% Ta-doped ZnO sample. - Graphical abstract: The addition of the tantalum into ZnO prepared by a modified polymerizable complex method not only restrains the growth of crystal, minish the particle size, but also changes the nanocrystal morphology.

Kong Jizhou [National Laboratory of Solid State Microstructures, Materials Science and Engineering Department, Nanjing University, Nanjing 210093 (China); Li Aidong, E-mail: adli@nju.edu.c [National Laboratory of Solid State Microstructures, Materials Science and Engineering Department, Nanjing University, Nanjing 210093 (China); Zhai Haifa; Gong Youpin; Li Hui; Wu Di [National Laboratory of Solid State Microstructures, Materials Science and Engineering Department, Nanjing University, Nanjing 210093 (China)

2009-08-15T23:59:59.000Z

57

TransporTaTionresearch Group newsletter reporT 2010  

E-Print Network (OSTI)

for the future. The Transportation Research Group participated in the Transportation Research Board ConferenceTliGhT on TransiT research 6 selecTed publicaTions by The 7 miTsl research Group TransporTaTion research board 9 TransporTaTion sTudenT 13 inTernships sTudenT profiles 14 recenT alumni 14 special noTes 14 Transportation

Fernandez, Eduardo

58

First principles calculation of phase diagrams of V-Nb, V-Ta and Nb-Ta alloys  

Science Conference Proceedings (OSTI)

We report the solid state phase diagram of V-Nb, V-Ta and Nb-Ta alloys computed by combining the density functional theory total energies with the cluster expansion and Monte Carlo techniques. From the computed phase diagrams, we find that V-Nb and Nb-Ta alloys form continuous series of solid solutions and the solid solution phase is stable down to ambient temperatures, consistent with experiments. The calculated bcc V-Ta phase diagram exhibits complete miscibility. Since the current cluster expansion ignore V{sub 2}Ta phase, the chemical interaction due to relatively large electronegativity difference, which cause the ordering of V{sub 2}Ta phase from the bcc solid solution, appears to manifest by making the solid solution phase remain stable for the complete concentration range, down to ambient temperatures, perhaps with some short-range-order. This work further demonstrates the dominant role of constituent strains in the accurate calculation of phase diagram of alloys of constituents with significant size mismatches.

Ravi, C.; Panigrahi, B. K.; Valsakumar, M. C.; Walle, A. Van de [Materials Physics Division, Indira Gandhi Centre for Atomic Research, Kalpakkam-603102 (India); Engineering and Applied Science Division, California Institute of Technology, Pasadena, California 91125 (United States)

2012-06-05T23:59:59.000Z

59

Diffuse TeV Emission at the Galactic Centre  

E-Print Network (OSTI)

The High-Energy Stereoscopic System (HESS) has detected intense diffuse TeV emission correlated with the distribution of molecular gas along the galactic ridge at the centre of our Galaxy. Earlier HESS observations of this region had already revealed the presence of several point sources at these energies, one of them (HESS J1745-290) coincident with the supermassive black hole Sagittarius A*. It is still not entirely clear what the origin of the TeV emission is, nor even whether it is due to hadronic or leptonic interactions. It is reasonable to suppose, however, that at least for the diffuse emission, the tight correlation of the intensity distribution with the molecular gas indicates a pionic-decay process involving relativistic protons. In this paper, we explore the possible source(s) of energetic hadrons at the galactic centre, and their propagation through a turbulent medium. We conclude that though Sagittarius A* itself may be the source of cosmic rays producing the emission in HESS J1745-290, it cannot be responsible for the diffuse emission farther out. A distribution of point sources, such as pulsar wind nebulae dispersed along the galactic plane, similarly do not produce a TeV emission profile consistent with the HESS map. We conclude that only a relativistic proton distribution accelerated throughout the inter-cloud medium can account for the TeV emission profile measured with HESS.

Elizabeth Wommer; Fulvio Melia; Marco Fatuzzo

2008-04-18T23:59:59.000Z

60

CdTe and Cd0.9Zn0.1Te Crystal Growth and Characterization for Nuclear Spectrometers  

Science Conference Proceedings (OSTI)

Large volume single crystals of CdTe and Cd0.9Zn0.1Te (CZT) have been grown by a controlled vertical Bridgman technique using in-house zone refined precursors and characterized through structural, electrical, optical, and spectroscopic methods. The grown crystals (diameter greater than or equal to 2.5 cm and length >10 cm) have shown promising characteristics for high-resolution room temperature solid-state radiation detectors due to their high resistivity (~1010 -cm for CdTe, and >1011 -cm for CZT) and good charge transport properties [ e ~ (2-5)x10-3 cm2/V]. The fabricated detectors in planar single element and Frisch collar configurations have shown very low leakage currents and high count rates for various sources, including Am-241, and Cs-137. The grown crystals have been further characterized by X-ray diffraction (XRD), infrared spectroscopy (IR), and transmission two-modulator generalized ellipsometry (2-MGE). Details of the CdTe and CZT characterization results, detector fabrication steps, and testing with radiation sources are presented. The CdTe and CZT crystals have shown high prospects for low power rating solid-state nuclear spectrometers and medical imaging devices.

Mandal, Krishna [EIC Laboratories, Inc.; Kang, Sung Hoon [EIC Laboratories, Inc.; Choi, Michael [EIC Laboratories, Inc.; Wright, Gomez W [ORNL; Jellison Jr, Gerald Earle [ORNL

2006-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ta te source" 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.


61

EA-1407: Proposed TA-16 Engineering Complex Refurbishment and Consolidation  

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

07: Proposed TA-16 Engineering Complex Refurbishment and 07: Proposed TA-16 Engineering Complex Refurbishment and Consolidation at Los Alamos National Laboratory, Los Alamos, New Mexico EA-1407: Proposed TA-16 Engineering Complex Refurbishment and Consolidation at Los Alamos National Laboratory, Los Alamos, New Mexico SUMMARY This EA evaluates the environmental impacts for the proposal to construct and operate offices, laboratories, and shops within the U.S. Department of Energy Los Alamos National Laboratory's (LANL) Technical Area 16 engineering complex where Engineering and Science Applications Division operations would be consolidated from other locations at LANL. PUBLIC COMMENT OPPORTUNITIES None available at this time. DOCUMENTS AVAILABLE FOR DOWNLOAD April 23, 2002 EA-1407: Finding of No Significant Impact

62

Recent results from the Milagro TeV gamma-ray observatory  

E-Print Network (OSTI)

Milagro is a gamma-ray observatory employing a water Cherenkov detector to observe extensive air showers produced by high-energy particles impacting in the Earth's atmosphere. We discuss the first detection of TeV gamma-rays from the Galactic plane and report the detection of an extended TeV source coincident with the EGRET source 3EG J0520+2556, and the observation of TeV emission from the Cygnus region of our Galaxy. We also summarize the status of our search for Very High Energy (VHE) emission from satellite-triggered Gamma Ray Bursts (GRBs) and discuss plans for the next generation water Cherenkov detector.

Parkinson, P M S

2005-01-01T23:59:59.000Z

63

POLARIZATION STUDIES OF CdZnTe DETECTORS USING SYNCHROTRON X-RAY RADIATION.  

Science Conference Proceedings (OSTI)

New results on the effects of small-scale defects on the charge-carrier transport in single-crystal CdZnTe (CZT) material were produced. We conducted detailed studies of the role of Te inclusions in CZT by employing a highly collimated synchrotron x-ray radiation source available at Brookhaven's National Synchrotron Light Source (NSLS). We were able to induce polarization effects by irradiating specific areas with the detector. These measurements allowed the first quantitative comparison between areas that are free of Te inclusions and those with a relatively high concentration of inclusions. The results of these polaration studies will be reported.

CAMARDA,G.S.; BOLOTNIKOV, A.E.; CUI, Y.; HOSSAIN, A.; JAMES, R.B.

2007-07-01T23:59:59.000Z

64

Detector Performance of Ammonium-Sulfide-Passivated CdZnTe and CdMnTe Materials  

Science Conference Proceedings (OSTI)

Dark currents, including those in the surface and bulk, are the leading source of electronic noise in X-ray and gamma detectors, and are responsible for degrading a detector's energy resolution. The detector material itself determines the bulk leakage current; however, the surface leakage current is controllable by depositing appropriate passivation layers. In previous research, we demonstrated the effectiveness of surface passivation in CZT (CdZnTe) and CMT (CdMnTe) materials using ammonium sulfide and ammonium fluoride. In this research, we measured the effect of such passivation on the surface states of these materials, and on the performances of detectors made from them.

Kim, K.H.; Bolotnikov, A.E.; Camarda, G.S.; Marchini, L.; Yang, G.; Hossain, A.; Cui, Y.; Xu, L.; and James, R.B.

2010-08-01T23:59:59.000Z

65

Effects of Te inclusions on the performance of CdZnTe radiation detectors  

Science Conference Proceedings (OSTI)

Te inclusions existing at high concentrations in CdZnTe (CZT) material can degrade the performance of CZT detectors. These microscopic defects trap the free electrons generated by incident radiation, so entailing significant fluctuations in the total collected charge and thereby strongly affecting the energy resolution of thick (long-drift) detectors. Such effects were demonstrated in thin planar detectors, and, in many cases, they proved to be the dominant cause of the low performance of thick detectors, wherein the fluctuations in the charge losses accumulate along the charge's drift path. We continued studying this effect using different tools and techniques. We employed a dedicated beamline recently established at BNL's National Synchrotron Light Source for characterizing semiconductor radiation detectors, along with an IR transmission microscope system, the combination of which allowed us to correlate the concentration of defects with the devices performances. We present here our new results from testing over 50 CZT samples grown by different techniques. Our goals are to establish tolerable limits on the size and concentrations of these detrimental Te inclusions in CZT material, and to provide feedback to crystal growers to reduce their numbers in the material.

Bolotnikov,A.E.; Abdul-Jabber, N. M.; Babalola, O. S.; Camarda, G. S.; Cui, Y.; Hossain, A. M.; Jackson, E. M.; Jackson, H. C.; James, J. A.; Kohman, K. T.; Luryi, A. L.; James, R. B.

2008-10-19T23:59:59.000Z

66

Tufts University GSAS and SOE Teaching Assistant (T.A.) Handbook  

E-Print Network (OSTI)

Tufts University GSAS and SOE Teaching Assistant (T.A.) Handbook 2012/2013 #12;T.A. Handbook 2012/13 Table of contents Page Welcome to Tufts! 3 Part I Policies 47 2. Important Contact Information 51 Last updated: 7/6/12 #12;T.A. Handbook 2012

Kounaves, Samuel P.

67

TA Orientation 2007 Activity 8 Designing a Problem Solving Framework/Answer Sheet  

E-Print Network (OSTI)

TA Orientation 2007 Activity 8 Designing a Problem Solving Framework/Answer Sheet Activity 8 - Page of population of students for whom they were developed. #12;TA Orientation 2007 Activity 8 Designing a Problem #12;TA Orientation 2007 Activity 8 Designing a Problem Solving Framework/Answer Sheet Activity 8

Minnesota, University of

68

TA Orientation 2004 Activity #8a: Expert-Novice Problem Solving and Methods Questions  

E-Print Network (OSTI)

TA Orientation 2004 Activity #8a: Expert-Novice Problem Solving and Methods Questions Page 77 1 , making some false moves but graduallymovingclosertowardthegoal. #12;TA Orientation 2004 Activity 8a to solution Draw abbreviated diagram of situation Textbook solution to Cowboy Bob Problem #12;TA Orientation

Minnesota, University of

69

TA Orientation 2004 Activity 5 (2 points). Teaching Discussion Sessions at UMn  

E-Print Network (OSTI)

TA Orientation 2004 Activity 5 (2 points). Teaching Discussion Sessions at UMn Page 61 The purpose answers/notes in the space provided. #12;TA Orientation 2004 Activity 5 (continued) Page 62 Preparation. QUESTIONS/NOTES: #12;TA Orientation 2004 Activity 5 (continued) Page 63 Instructor Actions What the Students

Minnesota, University of

70

TA Orientation 2006 Activity 8 Designing a Problem Solving Framework/Answer Sheet  

E-Print Network (OSTI)

TA Orientation 2006 Activity 8 Designing a Problem Solving Framework/Answer Sheet Activity 8 - Page of population of students for whom they were developed. #12;TA Orientation 2006 Activity 8 Designing a Problem #12;TA Orientation 2006 Activity 8 Designing a Problem Solving Framework/Answer Sheet Activity 8

Minnesota, University of

71

TA Orientation 1999 Activity #16a. Classroom Climate, Scholastic Dishonesty, and Diversity  

E-Print Network (OSTI)

TA Orientation 1999 Activity #16a. Classroom Climate, Scholastic Dishonesty, and Diversity Page 171. Brainstorm factors that contributed to the positive/negative classroom climate #12;TA Orientation 2004;TA Orientation 1999 Activity #16b (3 points) Page 173 Case Studies: Diversity and Gender Issues GROUP

Minnesota, University of

72

TA Orientation 2004 Activity 6a (1 point). The Cowboy Bob Problem  

E-Print Network (OSTI)

TA Orientation 2004 Activity 6a (1 point). The Cowboy Bob Problem Page 65 Below is a problem from the outlaws. #12;TA Orientation 2004 Activity 6a (continued) Page 66 Notes: #12;TA Orientation 2004 Activity Orientation 2004 Manager: _______________________ Activity 6b (2 points) Recorder

Minnesota, University of

73

The TeV spectrum of H1426+428  

E-Print Network (OSTI)

The BL Lac object H1426+428 was recently detected as a high energy gamma-ray source by the VERITAS collaboration (Horan et al. 2002). We have reanalyzed the 2001 portion of the data used in the detection in order to examine the spectrum of H1426+428 above 250 GeV. We find that the time-averaged spectrum agrees with a power law of the shape dF/dE = 10^(-7.31 +- 0.15(stat) +- 0.16(syst)) x E^(-3.50 +- 0.35(stat) +- 0.05(syst)) m^(-2)s^(-1)TeV^(-1) The statistical evidence from our data for emission above 2.5 TeV is 2.6 sigma. With 95% c.l., the integral flux of H1426+428 above 2.5 TeV is larger than 3% of the corresponding flux from the Crab Nebula. The spectrum is consistent with the (non-contemporaneous) measurement by Aharonian et al. (2002) both in shape and in normalization. Below 800 GeV, the data clearly favours a spectrum steeper than that of any other TeV Blazar observed so far indicating a difference in the processes involved either at the source or in the intervening space.

D. Petry; I. H. Bond; S. M. Bradbury; J. H. Buckley; D. A. Carter-Lewis; W. Cui; C. Duke; I. de la Calle Perez; A. Falcone; D. J. Fegan; S. J. Fegan; J. P. Finley; J. A. Gaidos; K. Gibbs; S. Gammell; J. Hall; T. A. Hall; A. M. Hillas; J. Holder; D. Horan; M. Jordan; M. Kertzman; D. Kieda; J. Kildea; J. Knapp; K. Kosack; F. Krennrich; S. LeBohec; P. Moriarty; D. Müller; T. N. Nagai; R. Ong; M. Page; R. Pallassini; B. Power-Mooney; J. Quinn; N. W. Reay; P. T. Reynolds; H. J. Rose; M. Schroedter; G. H. Sembroski; R. Sidwell; N. Stanton; S. P. Swordy; V. V. Vassiliev; S. P. Wakely; G. Walker; T. C. Weekes

2002-07-23T23:59:59.000Z

74

A GENERAL RELATIVISTIC EXTERNAL COMPTON-SCATTERING MODEL FOR TeV EMISSION FROM M87  

SciTech Connect

M87 is the first detected non-blazar extragalactic tera-electron-volt (TeV) source with rapid variation and a very flat spectrum in the TeV band. To explain the two peaks in the spectral energy distribution of the nucleus of M87, which is similar to that of blazars, the most commonly adopted models are the synchrotron self-Compton-scattering models and the external inverse Compton (EIC) scattering models. Considering that there is no correlated variation in the soft band (from radio to X-ray) matching the TeV variation and that the TeV sources should not suffer from {gamma}{gamma} absorption due to the flat TeV spectrum, the EIC models are advantageous in modeling the TeV emission from M87. In this paper, we propose a self-consistent EIC model to explain the flat TeV spectrum of M87 within the framework of fully general relativity, where the background soft photons are from the advection-dominated accretion flow around the central black hole, and the high-energy electrons are from the mini-jets that are powered by the magnetic reconnection in the main jet. In our model, both the TeV flares observed in the years 2005 and 2008 could be well explained: the {gamma}{gamma} absorption for TeV photons is very low, even inside the region very close to the black hole 20R{sub g} {approx} 50R{sub g} ; at the same region, the average EIC cooling time ({approx}10{sup 2} {approx} 10{sup 3} s) is short, which is consistent with the observed timescale of the TeV variation. Furthermore, we also discuss the possibility that the accompanying X-ray flare in 2008 is due to the direct synchrotron radiation of the mini-jets.

Cui Yudong; Yuan Yefei [Key Laboratory for Research in Galaxies and Cosmology, Department of Astronomy, University of Sciences and Technology of China, CAS, Hefei, Anhui 230026 (China); Li Yanrong; Wang Jianmin, E-mail: yfyuan@ustc.edu.cn [Key Laboratory for Particle Astrophysics, Institute of High Energy Physics, CAS, 19B Yuquan Road, Beijing 100049 (China)

2012-02-20T23:59:59.000Z

75

Molecular Beam Epitaxial Growth of Bi2Te3 and Sb2Te3 Topological Insulators on GaAs (111) Substrates: A Potential Route to Fabricate Topological Insulator p-n Junction  

E-Print Network (OSTI)

High quality Bi2Te3 and Sb2Te3 topological insulators films were epitaxially grown on GaAs (111) substrate using solid source molecular beam epitaxy. Their growth and behavior on both vicinal and non-vicinal GaAs (111) substrates were investigated by reflection high-energy electron diffraction, atomic force microscopy, x-ray diffraction, and high resolution transmission electron microscopy. It is found that non-vicinal GaAs (111) substrate is better than a vicinal substrate to provide high quality Bi2Te3 and Sb2Te3 films. Hall and magnetoresistance measurements indicate that p type Sb2Te3 and n type Bi2Te3 topological insulator films can be directly grown on a GaAs (111) substrate, which may pave a way to fabricate topological insulator p-n junction on the same substrate, compatible with the fabrication process of present semiconductor optoelectronic devices.

Zhaoquan Zeng; Timothy A. Morgan; Dongsheng Fan; Chen Li; Yusuke Hirono; Xian Hu; Yanfei Zhao; Joon Sue Lee; Zhiming M. Wang; Jian Wang; Shuiqing Yu; Michael E. Hawkridge; Mourad Benamara; Gregory J. Salamo

2013-01-03T23:59:59.000Z

76

Dislocation nucleation in bcc Ta single crystals studied by nanoindentation  

SciTech Connect

The study of dislocation nucleation in closed-packed metals by nanoindentation has recently attracted much interest. Here, we address the peculiarities of the incipient plasticity in body centered cubic (bcc) metals using low index Ta single-crystals as a model system. The combination of nanoindentation with high-resolution atomic force microscopy provides us with experimental atomic-scale information on the process of dislocation nucleation and multiplication. Our results reveal a unique deformation behavior of bcc Ta at the onset of plasticity which is distinctly different from that of closed-packed metals. Most noticeable, we observe only one rather than a sequence of discontinuities in the load-displacement curves. This and other differences are discussed in context of the characteristic plastic deformation behavior of bcc metals.

Biener, M M; Biener, J; Hodge, A M; Hamza, A V

2007-08-08T23:59:59.000Z

77

TA-DA: A TOOL FOR ASTROPHYSICAL DATA ANALYSIS  

SciTech Connect

We present the Tool for Astrophysical Data Analysis (TA-DA), a new software aimed to greatly simplify and improve the analysis of stellar photometric data in comparison with theoretical models, and allow the derivation of stellar parameters from multi-band photometry. Its flexibility allows one to address a number of such problems: from the interpolation of stellar models, or sets of stellar physical parameters in general, to the computation of synthetic photometry in arbitrary filters or units; from the analysis of observed color-magnitude diagrams to a Bayesian derivation of stellar parameters (and extinction) based on multi-band data. TA-DA is available as a pre-compiled Interactive Data Language widget-based application; its graphical user interface makes it considerably user-friendly. In this paper, we describe the software and its functionalities.

Da Rio, Nicola [European Space Agency, Keplerlaan 1, 2200-AG Noordwijk (Netherlands); Robberto, Massimo, E-mail: ndario@rssd.esa.int [Space Telescope Science Institute, 3700 San Martin Dr., Baltimore, MD 21218 (United States)

2012-12-01T23:59:59.000Z

78

Synthesis and Optical Properties of NuTaN2: Potential Solar Cell Applications  

Science Conference Proceedings (OSTI)

Layered CuTaN2 was synthesized by an ion exchange reaction of CuI and NaTaN2 as previously reported. Based on the results of EDX analysis, the Cu:Ta ratio of the CuTaN2 sample was 1:1 within the overall errors when examining powders of +/-10% and no Na was detected. The crystal structure and thermal stability of CuTaN2 was accurately determined by Rietveld analysis of the powder X-ray Diffraction profile and by TGA analysis, respectively. CuTaN2 crystallizes in a rhombohedral structure with space group R-3mH as shown in [figure 1]. CuTaN2 possesses a band gap of 1.53(x) eV, which is in reasonable agreement with density functional theory calculations of Cu containing nitrides. Similar materials may be even better suited for solar cell application.

Yang, M.; Zakutayev, A.; Zhang, X.; Ginley, D.; DiSalvo, F.

2013-01-01T23:59:59.000Z

79

Issues for reuse of gloveboxes at LANL TA-55  

Science Conference Proceedings (OSTI)

This report is a summary of issues that face plutonium glovebox designers and users at the Los Alamos National Laboratory (LANL) Technical Area 55 (TA-55). Characterizing the issues is a step in the task of enhancing the next generation glovebox design to minimize waste streams while providing the other design functions. This report gives an initial assessment of eight important design and operation issues that can benefit from waste minimization.

Cadwallader, L.C.; Pinson, P.A.; Miller, C.F.

1998-08-01T23:59:59.000Z

80

Complete genome sequence of Tolumonas auensis type strain (TA 4T)  

Science Conference Proceedings (OSTI)

Tolumonas auensis Fischer-Romero et al. 1996 is currently the only validly named species of the genus Tolumonas in the family Aeromonadaceae. The strain is of interest because of its ability to produce toluene from phenylalanine and other phenyl precursors, as well as phenol from tyrosine. This is of interest because toluene is normally considered to be a tracer of anthropogenic pollution in lakes, but T. auensis represents a biogenic source of toluene. Oth- er than Aeromonas hydrophila subsp. hydrophila, T. auensis strain TA 4T is the only other member in the family Aeromonadaceae with a completely sequenced type-strain genome. The 3,471,292 bp chromosome with a total of 3,288 protein-coding and 116 RNA genes was sequenced as part of the DOE Joint Genome Institute Program JBEI 2008.

Chertkov, Olga [Los Alamos National Laboratory (LANL); Copeland, A [U.S. Department of Energy, Joint Genome Institute; Lucas, Susan [U.S. Department of Energy, Joint Genome Institute; Lapidus, Alla L. [U.S. Department of Energy, Joint Genome Institute; Berry, Alison M [California Institute of Technology, University of California, Davis; Detter, J. Chris [U.S. Department of Energy, Joint Genome Institute; Glavina Del Rio, Tijana [U.S. Department of Energy, Joint Genome Institute; Hammon, Nancy [U.S. Department of Energy, Joint Genome Institute; Dalin, Eileen [U.S. Department of Energy, Joint Genome Institute; Tice, Hope [U.S. Department of Energy, Joint Genome Institute; Pitluck, Sam [U.S. Department of Energy, Joint Genome Institute; Richardson, P M [U.S. Department of Energy, Joint Genome Institute; Bruce, David [Los Alamos National Laboratory (LANL); Goodwin, Lynne A. [Los Alamos National Laboratory (LANL); Han, Cliff [Los Alamos National Laboratory (LANL); Tapia, Roxanne [Los Alamos National Laboratory (LANL); Saunders, Elizabeth H [Los Alamos National Laboratory (LANL); Schmutz, Jeremy [Stanford University; Brettin, Thomas S [ORNL; Larimer, Frank W [ORNL; Land, Miriam L [ORNL; Hauser, Loren John [ORNL; Spring, Stefan [DSMZ - German Collection of Microorganisms and Cell Cultures GmbH, Braunschweig, Germany; Rohde, Manfred [HZI - Helmholtz Centre for Infection Research, Braunschweig, Germany; Kyrpides, Nikos C [U.S. Department of Energy, Joint Genome Institute; Ivanova, N [U.S. Department of Energy, Joint Genome Institute; Goker, Markus [DSMZ - German Collection of Microorganisms and Cell Cultures GmbH, Braunschweig, Germany; Beller, Harry R. [Lawrence Berkeley National Laboratory (LBNL); Klenk, Hans-Peter [DSMZ - German Collection of Microorganisms and Cell Cultures GmbH, Braunschweig, Germany; Woyke, Tanja [U.S. Department of Energy, Joint Genome Institute

2011-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ta te source" 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.


81

Complete genome sequence of Tolumonas auensis type strain (TA 4T)  

Science Conference Proceedings (OSTI)

Tolumonas auensis (Fischer-Romero et al. 1996) is currently the only validly named species of the genus Tolumonas in the family Aeromonadaceae. The strain is of interest because of its ability to produce toluene from phenylalanine and other phenyl precursors, as well as phenol from tyrosine. This is of interest because toluene is normally considered to be a tracer of anthropogenic pollution in lakes, but T. auensis represents a biogenic source of toluene. Other than Aeromonas hydrophila subsp. hydrophila, T. auensis strain TA 4T is the only other member in the family Aeromonadaceae with a completely sequenced type-strain genome. The 3,471,292-bp chromosome with a total of 3,288 protein-coding and 116 RNA genes was sequenced as part of the DOE Joint Genome Institute Program JBEI 2008.

Chertkov, Olga; Copeland, Alex; Lucas1, Susa; Lapidus, Alla; Berry, KerrieW.; Detter, JohnC.; Glavina Del Rio, Tijana; Hammon, Nancy; Dalin, Eileen; Tice, Hope; Pitluck, Sam; Richardson, Paul; Bruce, David; Goodwin, Lynne; Han, Cliff; Tapia, Roxanne; Saunders, Elizabeth; Schmutz, Jeremy; Brettin, Thomas; Larimer, Frank; Land, Miriam; Hauser, Loren; Spring, Stefan; Rohde, Manfred; Kyrpides, NikosC.; Ivanova, Natalia; Göker, Markus; Beller, HarryR.; Klenk, Hans-Peter; Woyke, Tanja

2011-10-04T23:59:59.000Z

82

Structural, mechanical, and electronic properties of TaB{sub 2}, TaB, IrB{sub 2}, and IrB: First-principle calculations  

Science Conference Proceedings (OSTI)

First-principle calculations were performed to investigate the structural, elastic, and electronic properties of TaB{sub 2}, TaB, IrB{sub 2}, and IrB. The calculated equilibrium structural parameters, shear modulus, and Young's modulus of TaB{sub 2} are well consistent with the available experimental data, and TaB{sub 2} with P6/mmm space group has stronger directional bonding between ions than WB{sub 2}, OsB{sub 2}, IrN{sub 2}, and PtN{sub 2}. For TaB{sub 2}, the hexagonal P6/mmm structure is more stable than the orthorhombic Pmmn one, while for IrB{sub 2} the orthorhombic Pmmn structure is the most stable one. The high shear modulus of P6/mmm phase TaB{sub 2} is mainly due to the strong covalent pi-bonding of B-hexagon in the (0001) plane. Such a B-hexagon network can strongly resist against an applied [112-bar0] (0001) shear deformation. Correlation between the hardness and the elastic constants of TaB{sub 2} was discussed. The band structure shows that P6/mmm phase TaB{sub 2} and Pmmn phase IrB{sub 2} are both metallic. The calculations show that both TaB and IrB are elastically stable with the hexagonal P6{sub 3}/mmc structure. - Elastic constant c{sub 44} of TaB{sub 2} is calculated to be 235 GPa. This value is exceptionally high, exceeding those of WB{sub 2}, OsB{sub 2}, WB{sub 4}, OsN{sub 2}, IrN{sub 2}, and PtN{sub 2}.

Zhao Wenjie [Institute for Computational Materials Science, School of Physics and Electronics, Henan University, Kaifeng 475004 (China); Wang Yuanxu, E-mail: wangyx@henu.edu.c [Institute for Computational Materials Science, School of Physics and Electronics, Henan University, Kaifeng 475004 (China)

2009-10-15T23:59:59.000Z

83

The system Ta-V-Si: Crystal structure and phase equilibria  

SciTech Connect

Phase relations have been evaluated for the Ta-V-Si system at 1500 and 1200 Degree-Sign C. Three ternary phases were found: {tau}{sub 1}-(Ta,V){sub 5}Si{sub 3} (Mn{sub 5}Si{sub 3}-type), {tau}{sub 2}-Ta(Ta,V,Si){sub 2} (MgZn{sub 2}-type) and {tau}{sub 3}-Ta(Ta,V,Si){sub 2} (MgCu{sub 2}-type). The crystal structure of {tau}{sub 2}-Ta(Ta,V,Si){sub 2} was solved by X-ray single crystal diffraction (space group P6{sub 3}/mmc). Atom order in the crystal structures of {tau}{sub 1}-(Ta,V){sub 5}Si{sub 3} (Mn{sub 5}Si{sub 3} type) and {tau}{sub 3}-Ta(Ta,V,Si){sub 2} was derived from X-ray powder diffraction data. A large homogeneity range was found for {tau}{sub 1}-(Ta{sub x}V{sub 1-x}){sub 5}Si{sub 3} revealing random exchange of Ta and V at a constant Si content. At 1500 Degree-Sign C, the end points of the {tau}{sub 1}-phase solution (0.082{<=}x{<=}0.624) are in equilibrium with the solutions (Ta{sub 1-x}V{sub x}){sub 5}Si{sub 3} (Cr{sub 5}B{sub 3} type, 0{<=}x{<=}0.128) and (Ta{sub x}V{sub 1-x}){sub 5}Si{sub 3} (W{sub 5}Si{sub 3} type, 0{<=}x{<=}0.048). - Graphical abstract: Phase relations have been evaluated for the Ta-V-Si system at 1500 and 1200 Degree-Sign C. Highlights: Black-Right-Pointing-Pointer Phase relations have been evaluated for the Ta-V-Si system at 1500 and 1200 Degree-Sign C. Black-Right-Pointing-Pointer Three ternary phases were found at 1500 Degree-Sign C. Black-Right-Pointing-Pointer At 1500 Degree-Sign C, {tau}{sub 1}-phase has large homogeneity region (0.064{<=}x{<=}0.624).

Khan, A.U. [Institute of Physical Chemistry, University of Vienna, Waehringerstrasse 42, A-1090 Wien (Austria); Broz, P. [Masaryk University, Department of Chemistry, Kolarska 2, 611 37, Brno (Czech Republic); Masaryk University, Central European Institute of Technology, CEITEC, Kamenice 753/5, 625 00, Brno (Czech Republic); Niu, H.Y. [Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang (China); Bursik, J. [Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Zizkova 22, 61662 Brno (Czech Republic); Grytsiv, A. [Institute of Physical Chemistry, University of Vienna, Waehringerstrasse 42, A-1090 Wien (Austria); Chen, X.-Q. [Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang (China); Giester, G. [Institute of Mineralogy and Crystallography, University of Vienna, Althanstrasse 14, A-1090 Wien (Austria); Rogl, P., E-mail: peter.franz.rogl@univie.ac.at [Institute of Physical Chemistry, University of Vienna, Waehringerstrasse 42, A-1090 Wien (Austria)

2012-03-15T23:59:59.000Z

84

CRAD, Quality Assurance - Los Alamos National Laboratory TA 55 SST Facility  

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

TA 55 SST TA 55 SST Facility CRAD, Quality Assurance - Los Alamos National Laboratory TA 55 SST Facility A section of Appendix C to DOE G 226.1-2 "Federal Line Management Oversight of Department of Energy Nuclear Facilities." Consists of Criteria Review and Approach Documents (CRADs) used for an assessment of the Quality Assurance Program at the Los Alamos National Laboratory TA 55 SST Facility. CRADs provide a recommended approach and the types of information to gather to assess elements of a DOE contractor's programs. CRAD, Quality Assurance - Los Alamos National Laboratory TA 55 SST Facility More Documents & Publications CRAD, Quality Assurance - Los Alamos National Laboratory Waste Characterization, Reduction, and Repackaging Facility CRAD, Management - Los Alamos National Laboratory TA 55 SST Facility

85

Low emissivity Ag/Ta/glass multilayer thin films deposited by sputtering  

SciTech Connect

Ta is deposited on a glass substrate as an interlayer for the two-dimensional growth of Ag thin films because Ta has good thermal stability and can induce a negative surface-energy change in Ag/glass. From the transmission electron microscopy results, we concluded that the Ag crystals in the bottom layer (seemingly on Ag/Ta) were flattened; this was rarely observed in the three-dimensional growth mode. Comparing Ag/Ta/glass with Ag/glass, we found that the Ta interlayer was effective in reducing both the resistance and the emissivity, accompanied by the relatively high transmittance in the visible region. In particular, Ag(9 nm)/Ta(1 nm)/glass film showed 0.08 of the emissivity, including {approx}61% of the transmittance in the visible region (wavelength: 550 nm).

Park, Sun Ho [Division of Advanced Materials Engineering, Kongju National University, Budaedong, Cheonan City (Korea, Republic of); Lee, Kee Sun [Division of Advanced Materials Engineering, Kongju National University, Budaedong, Cheonan City (Korea, Republic of); Green Home Energy Technology Center, Cheonan City (Korea, Republic of); Sivasankar Reddy, A. [Green Home Energy Technology Center, Cheonan City (Korea, Republic of)

2011-09-15T23:59:59.000Z

86

TaC Studios New Construction Test House  

SciTech Connect

As part of the NAHB Research Center Industry Partnership, Southface partnered with TaC Studios, an Atlanta based architecture firm specializing in residential and light commercial design, on the construction of a new test home in Atlanta, GA in the mixed humid climate zone. This home will serve as a model home for the builder partner and addresses Building America energy savings targets through the planning and implementation of a design package will serve as a basis of design for the builder partner's future homes. As a BA test house, this home will be evaluated to detail whole house energy use, end use loads, and HVAC and hot water efficiency.

Butler, T.; Curtis, O.; Kim, E.; Roberts, S.; Stephenson, R.

2013-03-01T23:59:59.000Z

87

Effects of Changes in Alloy Composition on Toughness of Ni-Ta-X ...  

Science Conference Proceedings (OSTI)

On-Site Speaker (Planned), John J Lewandowski. Abstract Scope, The effects of changes in alloy chemistry on the fracture behavior of Ni-Ta-X glasses are ...

88

TE Connectivity Finds Answers in Tomography  

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

TE Connectivity Finds Answers in TE Connectivity Finds Answers in Tomography TE Connectivity Finds Answers in Tomography Print Thursday, 22 August 2013 10:50 TE Connectivity is a world leader in connectivity-the $13 billion global company designs and manufactures more than 500,000 different electronic connectivity products for the automotive, energy, industrial, broadband communications, consumer device, healthcare, aerospace, and defense industries. TE Connectivity has a long-standing commitment to innovation and engineering excellence. Their products help address challenges arising from companies' need for energy efficiency, always-on communications, and ever-increasing productivity. Recently, a team led by TE's senior manager of materials development, Dr. Jerzy Gazda (at left), has been investigating how ALS tomography capabilities can help the company develop more efficient connectors.

89

Recycling of CdTe photovoltaic waste  

DOE Patents (OSTI)

A method for extracting and reclaiming metals from scrap CdTe photovoltaic cells and manufacturing waste by leaching the waste with a leaching solution comprising nitric acid and water, skimming any plastic material from the top of the leaching solution, separating the glass substrate from the liquid leachate and electrolyzing the leachate to separate Cd from Te, wherein the Te is deposits onto a cathode while the Cd remains in solution.

Goozner, Robert E. (Charlotte, NC); Long, Mark O. (Charlotte, NC); Drinkard, Jr., William F. (Charlotte, NC)

1999-01-01T23:59:59.000Z

90

Ultrahigh Energy Cosmic Rays and Prompt TeV Gamma Rays from Gamma Ray Bursts  

E-Print Network (OSTI)

Gamma Ray Bursts (GRBs) have been proposed as one {\\it possible} class of sources of the Ultrahigh Energy Cosmic Ray (UHECR) events observed up to energies $\\gsim10^{20}\\ev$. The synchrotron radiation of the highest energy protons accelerated within the GRB source should produce gamma rays up to TeV energies. Here we briefly discuss the implications on the energetics of the GRB from the point of view of the detectability of the prompt TeV gamma rays of proton-synchrotron origin in GRBs in the up-coming ICECUBE muon detector in the south pole.

Pijushpani Bhattacharjee; Nayantara Gupta

2003-05-12T23:59:59.000Z

91

Study of possible systematics in the L*X - Ta* correlation of Gamma Ray Bursts  

E-Print Network (OSTI)

Gamma Ray Bursts (GRBs) are the most energetic sources in the universe and among the farthest known astrophysical sources. These features make them appealing candidates as standard candles for cosmological applications so that studying the physical mechanisms for the origin of the emission and correlations among their observable properties is an interesting task. We consider here the luminosity L*X - break time Ta* (hereafter LT) correlation and investigate whether there are systematics induced by selection effects or redshift dependent calibra- tion. We perform this analysis both for the full sample of 77 GRBs with known redshift and for the subsample of GRBs having canonical X-ray light curves, hereafter called U0095 sample. We do not find any systematic bias thus con- firming the existence of physical GRB subclasses revealed by tight correlations of their afterglow properties. Furthermore, we study the possibility of applying the LT correlation as a redshift estimator both for the full distribution and for the canonical lightcurves. The large uncertainties and the non negligible intrin- sic scatter make the results not so encouraging, but there are nevertheless some hints motivating a further analysis with an increased U0095 sample.

M. G. Dainotti; V. F. Cardone; S. Capozziello; M. Ostrowski; R. Willingale

2011-01-09T23:59:59.000Z

92

Characteristics of Plasma-Treated Amorphous Ta-Si-C Film as a ...  

Science Conference Proceedings (OSTI)

The Cu/Ta-Si-C/Si stacked film has a failure temperature of 750°C/1 min by using Ar + H2 plasma treatment of a 5 nm-thick Ta-Si-C film, and the stacked film has ...

93

Response of Cds/CdTe Devices to Te Exposure of Back Contact: Preprint  

DOE Green Energy (OSTI)

Theoretical predictions of thin-film CdS/CdTe photovoltaic (PV) devices have suggested performance may be improved by reducing recombination due to Te-vacancy (VTe) or Te-interstitial (Tei) defects. Although formation of these intrinsic defects is likely influenced by CdTe deposition parameters, it also may be coupled to formation of beneficial cadmium vacancy (VCd) defects. If this is true, reducing potential effects of VTe or Tei may be difficult without also reducing the density of VCd. In contrast, post-deposition processes can sometimes afford a greater degree of defect control. Here we explore a post-deposition process that appears to influence the Te-related defects in polycrystalline CdTe. Specifically, we have exposed the CdTe surface to Te prior to ZnTe:Cu/Ti contact-interface formation with the goal of reducing VTe but without significantly reducing VCd. Initial results show that when this modified contact is used on a CdCl2-treated CdS/CdTe device, significantly poorer device performance results. This suggests two things: First, the amount of free-Te available during contact formation (either from chemical etching or CuTe or ZnTe deposition) may be a more important parameter to device performance than previously appreciated. Second, if processes have been used to reduce the effect of VTe (e.g., oxygen and chlorine additions to the CdTe), adding even a small amount of Te may produce detrimental defects.

Gessert, T. A.; Burst, J. M.; Ma, J.; Wei, S. H.; Kuciauskas, D.; Barnes, T. M.; Duenow, J. N.; Young, M. R.; Rance, W. L.; Li, J. V.; Dippo, P.

2012-06-01T23:59:59.000Z

94

TaC Studios New Construction Test House  

SciTech Connect

As part of the NAHB Research Center Industry Partnership, Southface partnered with TaC Studios, an Atlanta based architecture firm specializing in residential and light commercial design, on the construction of a new test home in Atlanta, GA in the mixed humid climate zone. This home will serve as a model home for the builder partner and addresses Building America energy savings targets through the planning and implementation of a design package will serve as a basis of design for the builder partner's future homes. As a BA test house, this home will be evaluated to detail whole house energy use, end use loads, and HVAC and hot water efficiency.

Butler, T.; Curtis, O.; Kim, E.; Roberts, S.; Stephenson, R.

2013-03-01T23:59:59.000Z

95

Electron Cloud at Low Emittance in CesrTA  

SciTech Connect

The Cornell Electron Storage Ring (CESR) has been reconfigured as a test accelerator (CesrTA) for a program of electron cloud (EC) research at ultra low emittance. The instrumentation in the ring has been upgraded with local diagnostics for measurement of cloud density and with improved beam diagnostics for the characterization of both the low emittance performance and the beam dynamics of high intensity bunch trains interacting with the cloud. A range of EC mitigation methods have been deployed and tested and their effectiveness is discussed. Measurements of the electron cloud's effect on the beam under a range of conditions are discussed along with the simulations being used to quantitatively understand these results.

Palmer, Mark; /Cornell U., CLASSE; Alexander, James; /Cornell U., CLASSE; Billing, Michael; /Cornell U., CLASSE; Calvey, Joseph; /Cornell U., CLASSE; Conolly, Christopher; /Cornell U., CLASSE; Crittenden, James; /Cornell U., CLASSE; Dobbins, John; /Cornell U., CLASSE; Dugan, Gerald; /Cornell U., CLASSE; Eggert, Nicholas; /Cornell U., CLASSE; Fontes, Ernest; /Cornell U., CLASSE; Forster, Michael; /Cornell U., CLASSE; Gallagher, Richard; /Cornell U., CLASSE; Gray, Steven; /Cornell U., CLASSE; Greenwald, Shlomo; /Cornell U., CLASSE; Hartill, Donald; /Cornell U., CLASSE; Hopkins, Walter; /Cornell U., CLASSE; Kreinick, David; /Cornell U., CLASSE; Kreis, Benjamin; /Cornell U., CLASSE; Leong, Zhidong; /Cornell U., CLASSE; Li, Yulin; /Cornell U., CLASSE; Liu, Xianghong; /Cornell U., CLASSE /Cornell U., CLASSE /Cornell U., CLASSE /Cornell U., CLASSE /Cornell U., CLASSE /Cornell U., CLASSE /Cornell U., CLASSE /Cornell U., CLASSE /Cornell U., CLASSE /Cornell U., CLASSE /Cornell U., CLASSE /Cornell U., CLASSE /Cornell U., CLASSE /Cornell U., CLASSE /Cornell U., CLASSE /Cornell U., CLASSE /Cornell U., CLASSE /Cornell U., CLASSE /Cornell U., CLASSE /Cornell U., CLASSE /Cornell U., CLASSE /Cornell U., CLASSE /Cornell U., CLASSE /Cornell U., CLASSE /Cornell U., CLASSE /Cornell U., CLASSE /CERN /CERN /CERN /CERN /CERN /CERN; /more authors..

2012-07-06T23:59:59.000Z

96

CRAD, Occupational Safety & Health - Los Alamos National Laboratory TA 55  

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

Los Alamos National Laboratory Los Alamos National Laboratory TA 55 SST Facility CRAD, Occupational Safety & Health - Los Alamos National Laboratory TA 55 SST Facility A section of Appendix C to DOE G 226.1-2 "Federal Line Management Oversight of Department of Energy Nuclear Facilities." Consists of Criteria Review and Approach Documents (CRADs) used for an assessment of the Industrial Hygiene program at the Los Alamos National Laboratory TA 55 SST Facility. CRADs provide a recommended approach and the types of information to gather to assess elements of a DOE contractor's programs. CRAD, Occupational Safety & Health - Los Alamos National Laboratory TA 55 SST Facility More Documents & Publications CRAD, Conduct of Operations - Los Alamos National Laboratory TA 55 SST

97

Particulate Contacts to Si and CdTe: Al, Ag, Hg-Cu-Te, and Sb-Te  

DOE Green Energy (OSTI)

Our team has been investigating the use of particle-based contacts in both Si and CdTe solar cell technologies. First, in the area of contacts to Si, powders of Al and Ag prepared by an electroexplosion process have been characterized by transmission electron microscopy (TEM), TEM elemental determination X-ray spectroscopy (TEM-EDS), and TEM electron diffraction (TEM-ED). These Al and Ag particles were slurried and tested as contacts to p- and n-type silicon wafers, respectively. Linear current-voltage (I-V) was observed for Ag on n-type Si, indicative of an ohmic contact, whereas the Al on p-type Si sample was non-ideal. A wet-chemical surface treatment was performed on one Al sample and TEM-EDS indicated a substantial decrease in the O contaminant level. The treated Al on p-type Si films exhibited linear I-V after annealing. Second, in the area of contacts to CdTe, particles of Hg-Cu-Te and Sb-Te have been applied as contacts to CdTe/CdS/SnO2 heterostructures prepared by the standard NREL protocol. First, Hg-Cu-Te and Sb-Te were prepared by a metathesis reaction. After CdCl2 treatment and NP etch of the CdTe layer, particle contacts were applied. The Hg-Cu-Te contacted cells exhibited good electrical characteristics, with Voc > 810 mV and efficiencies > 11.5 % for most cells. Although Voc > 800 mV were observed for the Sb-Te contacted cells, efficiencies in these devices were limited to 9.1%, presumably by a large series resistance (>20 {Omega}) observed in all samples.

Schulz, D. L.; Ribelin, D.; Curtis, C. J.; Ginley, D. S.

1998-10-22T23:59:59.000Z

98

Synthesis of Nanowires-enhanced Bulk TE Nanocomposite for High ...  

Science Conference Proceedings (OSTI)

Abstract Scope, There are great interest in developing high-efficiency thermoelectrical (TE) materials for power generation. Significant improvements in a few TE ...

99

EGS4 calculations for a Cd-Zn-Te detector to measure synchrotron radiation at PEP-II  

SciTech Connect

Calculations have been performed with the EGS4 Code System for a CdZnTe semiconductor detector to be used in background studies of synchrotron radiation at PEP-II. The simulations take into account K-shell fluorescent-photon production in a CdZnTe mixture, electron-hole pair collection and electronic-noise broadening. The results are compared with measurements made with encapsulated {sup 241}Am, {sup 133}Ba and {sup 109}Cd sources.

Nelson, W.R. [Stanford Univ., CA (US). Stanford Linear Accelerator Center; Borak, T.; Malchow, R.; Toki, W. [Colorado State Univ., Fort Collins, CO (US); Kadyk, J. [Lawrence Berkeley National Lab., CA (US)

1997-08-20T23:59:59.000Z

100

EGS4 CALCULATIONS FOR A Cd-Zn-Te DETECTOR TO? y MEASURE SYNCHROTRON RADIATION AT PEP-II  

E-Print Network (OSTI)

Calculations have been performed with the EGS4 Code System for a CdZnTe semiconductor detector to be used in background studies of synchrotron radiation at PEP-II. The simulations take into account K-shell uorescent-photon production in a CdZnTe mixture, electron-hole pair collection and electronic-noise broadening. The results are compared with measurements made with encapsulated 241 Am, 133 Ba and 109 Cd sources.

W. R. Nelson; T. Borak; R. Malchow; W. Toki; J. Kadyk

1997-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ta te source" 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.


101

Double-{beta}-decay Q values of {sup 130}Te, {sup 128}Te, and {sup 120}Te  

SciTech Connect

The double-{beta}-decay Q values of {sup 130}Te, {sup 128}Te, and {sup 120}Te have been determined from parent-daughter mass differences measured with the Canadian Penning Trap mass spectrometer. The {sup 132}Xe-{sup 129}Xe mass difference, which is precisely known, was also determined to confirm the accuracy of these results. The {sup 130}Te Q value was found to be 2527.01{+-}0.32 keV, which is 3.3 keV lower than the 2003 Atomic Mass Evaluation recommended value and is consistent with another recent Penning trap measurement. The {sup 128}Te and {sup 120}Te Q values were found to be 865.87{+-}1.31 and 1714.81{+-}1.25 keV, respectively. For {sup 120}Te, this reduction in uncertainty of nearly a factor of 8 opens up the possibility of using this isotope for sensitive searches for neutrinoless double-electron capture and electron capture with {beta}{sup +}emission.

Scielzo, N. D. [Physical Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California 94550 (United States); Caldwell, S.; Savard, G.; Sternberg, M.; Van Schelt, J. [Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States); Department of Physics, University of Chicago, Chicago, Illinois 60637 (United States); Clark, J. A.; Levand, A. F.; Sun, T. [Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States); Deibel, C. M. [Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States); Joint Institute of Nuclear Astrophysics, Michigan State University, East Lansing, Michigan 48824 (United States); Fallis, J. [Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States); Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2 (Canada); Gulick, S. [Department of Physics, McGill University, Montreal, Quebec H3A 2T8 (Canada); Lascar, D. [Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States); Department of Physics and Astronomy, Northwestern University, Evanston, Illinois 60208 (United States); Li, G. [Physics Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States); Department of Physics, McGill University, Montreal, Quebec H3A 2T8 (Canada); Mintz, J. [Department of Nuclear Engineering, University of California, Berkeley, California 94720 (United States); Norman, E. B. [Physical Sciences Directorate, Lawrence Livermore National Laboratory, Livermore, California 94550 (United States); Department of Nuclear Engineering, University of California, Berkeley, California 94720 (United States); Sharma, K. S. [Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2 (Canada)

2009-08-15T23:59:59.000Z

102

p-Doping limit and donor compensation in CdTe polycrystalline thin film solar cells  

E-Print Network (OSTI)

everything accelerates. ARCO solar produces more than 1 MW PV cells in `80, being the first in the world, the Million Solar Roofs in the US, and many more. Besides these programs, the efficiency of CdTe thin film PV energy source is the photovoltaic (PV) cell, which converts sunlight to electrical current, without any

Bieber, Michael

103

Recycling of CdTe photovoltaic waste  

DOE Patents (OSTI)

A method for extracting and reclaiming metals from scrap CdTe photovoltaic cells and manufacturing waste by leaching the metals in dilute nitric acid, leaching the waste with a leaching solution comprising nitric acid and water, skimming any plastic material from the top of the leaching solution, separating the glass substrate from the liquid leachate, adding a calcium containing base to the leachate to precipitate Cd and Te, separating the precipitated Cd and Te from the leachate, and recovering the calcium-containing base.

Goozner, Robert E. (Charlotte, NC); Long, Mark O. (Charlotte, NC); Drinkard, Jr., William F. (Charlotte, NC)

1999-04-27T23:59:59.000Z

104

Recycling of CdTe photovoltaic waste  

DOE Patents (OSTI)

A method for extracting and reclaiming metals from scrap CdTe photovoltaic cells and manufacturing waste by leaching the metals in dilute nitric acid, leaching the waste with a leaching solution comprising nitric acid and water, skimming any plastic material from the top of the leaching solution, separating the glass substrate from the liquid leachate, adding a calcium containing base to the leachate to precipitate Cd and Te, separating the precipitated Cd and Te from the leachate, and recovering the calcium-containing base. 3 figs.

Goozner, R.E.; Long, M.O.; Drinkard, W.F. Jr.

1999-04-27T23:59:59.000Z

105

NEPA REVIEW LASO-10-002 CATEGORICAL EXCLUSION PAJARITO ROAD RIGHT-OF-WAY SHIFT AT TA-50 AND TA-55  

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

REVIEW REVIEW LASO-10-002 CATEGORICAL EXCLUSION PAJARITO ROAD RIGHT-OF-WAY SHIFT AT TA-50 AND TA-55 1. DESCRIPTION OF PROPOSED ACTION: LANL proposes to shift a segment of Pajarito Road slightly to the south along the edge of Two-Mile Canyon in the vicinity of TA-55. The existing centerline would be moved between 36 feet and 56 feet depending on final designs. This shift would address the need to integrate security requirements related to the Chemistry and Metallurgy Building Replacement Project (CMRR) and the Nuclear Materials Safeguards and Security Upgrades Project (NMSSIJP) - specifically placement of the Perimeter Intrusion Detection, Assessment, and Delay System fence improvements in proximity to Pajarito Road. Pajarito Road is not open to the public and is secured to preclude unauthorized access to the facilities between

106

Thermodynamic and Transport Properties of YTe3, LaTe3 and CeTe3  

SciTech Connect

Measurements of heat capacity, susceptibility, and electrical resistivity are presented for single crystals of the charge density wave compounds YTe{sub 3}, LaTe{sub 3}, and CeTe{sub 3}. The materials are metallic to low temperatures, but have a small density of states due to the charge density wave gapping large portions of the Fermi surface. CeTe{sub 3} is found to be a weak Kondo lattice, with an antiferromagnetic ground state and T{sub N} = 2.8 K. The electrical resistivity of all three compounds is highly anisotropic, confirming the weak dispersion perpendicular to Te planes predicted by band structure calculations.

Ru, N.

2011-08-19T23:59:59.000Z

107

DOE - Office of Legacy Management -- TA-1 Manhattan Laboratory - NM 11  

Office of Legacy Management (LM)

TA-1 Manhattan Laboratory - NM 11 TA-1 Manhattan Laboratory - NM 11 FUSRAP Considered Sites Site: TA-1 MANHATTAN LABORATORY (NM.11 ) Eliminated from consideration under FUSRAP Designated Name: Not Designated Alternate Name: Main Technical Area LASL LANL NM.11-1 NM.11-2 NM.11-3 Location: Los Alamos , New Mexico NM.11-3 Evaluation Year: 1985 NM.11-1 Site Operations: Nuclear weapons research and development. NM.11-1 NM.11-3 Site Disposition: Site Disposition NM.11-1 Radioactive Materials Handled: Yes Primary Radioactive Materials Handled: Uranium , Plutonium, Fission Products NM.11-1 NM.11-3 Radiological Survey(s): Yes NM.11-2 NM.11-3 Site Status: Eliminated from consideration under FUSRAP NM.11-1 Also see Documents Related to TA-1 MANHATTAN LABORATORY NM.11-1 - DOE Memorandum/Checklist; Jones to File; Subject:

108

Kah-nee-ta Pool & Spa Low Temperature Geothermal Facility | Open Energy  

Open Energy Info (EERE)

Kah-nee-ta Pool & Spa Low Temperature Geothermal Facility Kah-nee-ta Pool & Spa Low Temperature Geothermal Facility Jump to: navigation, search Name Kah-nee-ta Pool & Spa Low Temperature Geothermal Facility Facility Kah-nee-ta Sector Geothermal energy Type Pool and Spa Location Warm Springs, Oregon Coordinates 44.7634519°, -121.2661625° 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":[]}

109

AOCS Official Method Te 3a-64  

Science Conference Proceedings (OSTI)

Acid Value and Free Amine Value of Fatty Quaternary Ammonium Chlorides AOCS Official Method Te 3a-64 Methods Downloads Methods Downloads DEFINITION The acid value is the mg of potassium hydroxide necessary to neut

110

Substrate CdTe Efficiency Improvements  

Thin film solar cells have been the focus of many research facilities in recent years that are working to decrease manufacturing costs and increase cell efficiency. Cadmium telluride (CdTe) has been well recognized as a promising photovoltaic material ...

111

AOCS Official Method Te 4a-70  

Science Conference Proceedings (OSTI)

Acid Value AOCS Official Method Te 4a-70 Methods Downloads Methods Downloads DEFINITION The acid value is the mg of potassium hydroxide necessary to neutralize the free acids in 1 g of test sample.

112

Perspective on TeV-scale physics  

Science Conference Proceedings (OSTI)

These lectures review theoretical motivations and experimental prospects for the study of TeV-scale physics. Three clues to the importance of TeV physics are discussed: implications of quantum corrections for the masses of a fourth generation quark-lepton family, the gauge hierarchy problem and known solutions, and implications of symmetry and unitarity for the symmetry-breaking sector of the electroweak gauge theory. The experimental prospects are reviewed with emphasis on the multi-TeV pp colliders that may be built in the 1990's. The topics include new phenomena that might occur - e.g., a fourth generation, heavy gauge bosons, composite structure, and supersymmetry - as well as the signals of the unknown SU(2)/sub L/ /times/ U(1)/sub Y/ breaking mechanism that must occur within the TeV domain. 96 refs., 21 figs.

Chanowitz, M.S.

1989-02-01T23:59:59.000Z

113

LaTeX Paper - TMS  

Science Conference Proceedings (OSTI)

LaTeX PAPER TMS1, Jane Doe2, John Doe2 1TMS (The Minerals Metals & Materials Society)184 Thorn Hill Rd.; Warrendale, PA 15086-7514, USA 2Name of ...

114

AOCS Official Method Te 1a-64  

Science Conference Proceedings (OSTI)

Acid Value AOCS Official Method Te 1a-64 Methods Downloads Methods Downloads DEFINITION The acid value is the mg of potassium hydroxide necessary to neutralize fatty acids in 1 g of test sample. SCO

115

AOCS Official Method Te 2a-64  

Science Conference Proceedings (OSTI)

Color, Photometric Index AOCS Official Method Te 2a-64 Methods Downloads Methods Downloads DEFINITION This method measures the color of commercial fatty acids and expresses the color as percent transmission at 440

116

Electrical and optical properties of Ta-Si-N thin films deposited by reactive magnetron sputtering  

SciTech Connect

The electrical and optical properties of Ta{sub x}Si{sub y}N{sub z} thin films deposited by reactive magnetron sputtering from individual Ta and Si targets were studied in order to investigate the effects of nitrogen and silicon contents on both properties and their correlation to the film microstructure. Three sets of fcc-Ta{sub x}Si{sub y}N{sub z} thin films were prepared: sub-stoichiometric Ta{sub x}Si{sub y}N{sub 0.44}, nearly stoichiometric Ta{sub x}Si{sub y}N{sub 0.5}, and over-stoichiometric Ta{sub x}Si{sub y}N{sub 0.56}. The optical properties were investigated by near-normal-incidence reflectivity and ellipsometric measurements in the optical energy range from 0.375 eV to 6.8 eV, while the d.c. electrical resistivity was measured in the van der Pauw configuration from 20 K to 300 K. The optical and electrical measurements were interpreted using the standard Drude-Lorentz model and the so-called grain boundary scattering model, respectively. The electronic properties were closely correlated with the compositional and structural modifications of the Ta{sub x}Si{sub y}N{sub z} films due to variations in the stoichiometry of the fcc-TaN{sub z} system and the addition of Si atoms. According to the nitrogen and silicon contents, fcc-Ta{sub x}Si{sub y}N{sub z} films can exhibit room temperature resistivity values ranging from 10{sup 2} {mu}{Omega} cm to about 6 Multiplication-Sign 10{sup 4} {mu}{Omega} cm. The interpretation of the experimental temperature-dependent resistivity data within the Grain Boundary Scattering model, combined with the results from optical investigations, showed that the mean electron transmission probability G and the free carriers concentration, N, are the main parameters that control the transport properties of these films. The results indicated that the correlation between electrical and optical measurements with the chemical composition and the nanostructure of the Ta{sub x}Si{sub y}N{sub z} thin films provides a pertinent and consistent description of the evolution of the Ta-Si-N system from a solid solution to a nanocomposite material due to the addition of Si atoms.

Oezer, D.; Sanjines, R. [Ecole Polytechnique Federale de Lausanne (EPFL), Institute of Condensed Matter Physics (ICMP), CH-1015 Lausanne (Switzerland); Ramirez, G.; Rodil, S. E. [Instituto de Investigaciones en Materiales, Universidad Nacional Autonoma de Mexico, Circuito Exterior s/n, CU, Mexico D.F. 04510 (Mexico)

2012-12-01T23:59:59.000Z

117

Unique LaTaO[subscript 4] Polymorph for Multiple Energy Applications  

DOE Green Energy (OSTI)

Rare-earth niobate and tantalate (RE-Nb/Ta) materials are of considerable interest in environmental and energy-related applications that include phosphors for solid-state lighting, photocatalysts for both contaminant degeneration and H{sub 2} generation, chemically robust hosts for nuclear materials and wastes, and ion conductors for lithium batteries or solid-oxide fuel cells. However, the chemically inert nature limits the synthetic routes available to obtain these materials, which in turn hampers the discovery and development of new RE-Nb/Ta phases. Of the simple orthotantalate, LaTaO{sub 4}, there were three polymorphs known prior. With this paper, we present the structural characterization (from high-resolution X-ray powder diffraction data collected at the APS 11-BM line) of a fourth polymorph. It is obtained only from dehydration of La{sub 2}Ta{sub 2}O{sub 7}(OH){sub 2}, which is in turn synthesized hydrothermally. The structure of the new LaTaO{sub 4} polymorph is distinctive from the others in the arrangement of the alternating La-O polyhedra layers and TaO{sub 6} octahedra layers. Luminescence measurements (Eu-doped) and photocatalysis studies of the new LaTaO{sub 4} polymorph, and comparison to the performance of a previously described LaTaO{sub 4} polymorph reveals enhanced performance of the new polymorph in both applications. This study illustrates the relevance of form-function relationships in solid-state materials, as well as the important role of synthesis in the development of advanced functional materials.

Nyman, May; Rodriguez, Mark A.; Rohwer, Lauren E.S.; Martin, James E.; Waller, Mollie; Osterloh, Frank E.; (Sandia); (UCD)

2009-11-04T23:59:59.000Z

118

GaTe semiconductor for radiation detection  

SciTech Connect

GaTe semiconductor is used as a room-temperature radiation detector. GaTe has useful properties for radiation detectors: ideal bandgap, favorable mobilities, low melting point (no evaporation), non-hygroscopic nature, and availability of high-purity starting materials. The detector can be used, e.g., for detection of illicit nuclear weapons and radiological dispersed devices at ports of entry, in cities, and off shore and for determination of medical isotopes present in a patient.

Payne, Stephen A. (Castro Valley, CA); Burger, Arnold (Nashville, TN); Mandal, Krishna C. (Ashland, MA)

2009-06-23T23:59:59.000Z

119

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).

120

Component Overpressure Growth and Characterization of High Resistivity CdTe Crystals for Radiation Detectors  

Science Conference Proceedings (OSTI)

Spectrometer-grade CdTe single crystals with resistivities higher than 10{sup 9} {Omega} cm have been grown by the modified Bridgman method using zone-refined precursor materials (Cd and Te) under a Cd overpressure. The grown CdTe crystals had good charge-transport properties ({mu}{tau}{sub e} = 2 x 10{sup -3} cm{sup 2} V{sup -1}, {mu}{tau}{sub h} = 8 x 10{sup -5} cm{sup 2} V{sup -1}) and significantly reduced Te precipitates compared with crystals grown without Cd overpressure. The crystal growth conditions for the Bridgman system were optimized by computer modeling and simulation, using modified MASTRAPP program, and applied to crystal diameters of 14 mm (0.55'), 38 mm (1.5'), and 76 mm (3'). Details of the CdTe crystal growth operation, structural, electrical, and optical characterization measurements, detector fabrication, and testing using {sup 241}Am (60 keV) and {sup 137}Cs (662 keV) sources are presented.

Mandal, Krishna [EIC Laboratories, Inc.; Kang, Sung Hoon [EIC Laboratories, Inc.; Choi, Michael [EIC Laboratories, Inc.; Wei, Jiuan [State University of New York, Stony Brook; Zheng, Lili [State University of New York, Stony Brook; Zhang, Hui [State University of New York, Stony Brook; Jellison Jr, Gerald Earle [ORNL; Groza, Michael [Fisk University, Nashville, TN; Burger, Arnold [Fisk University, Nashville, TN

2007-01-01T23:59:59.000Z

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121

Preparation and properties of evaporated CdTe films compared with single-crystal CdTe. Progress report no. 6, February 1, 1982-April 30, 1982  

DOE Green Energy (OSTI)

Films of n-type CdTe:In have been deposited by hot-wall vacuum evaporation (HWVE) on 7059 glass substrates, BaF/sub 2/ single crystal substrates, metal (Pt, Cr, Mo, Al) coated glass substrates, and single crystal p-type CdTe substrates. Films deposited on 7059 glass show typically a dark resistivity of 2 x 10/sup 5/ ohm-cm and a light resistivity of 3 x 10/sup 2/ ohm-cm. With increasing In source temperature, the resistivity decreases, but actually increases slightly again if the T/sub In/ is raised above 600/sup 0/C. Photoexcitation increases the electron density but does not affect the electron mobility. It appears that the grains are depleted in the dark. Films deposited on BaF/sup 2/ show dark resistivity of about 5 ohm-cm and light resistivity of about 2 ohm-cm, corresponding to electron densities of about 3 x 10/sup 16/ cm/sup -3/ and electron mobilities of about 30 cm/sup 2//V-sec. For doping levels abpove 10/sup 16/ cm/sup -3/ photoexcitation increases the mobility, but not the electron density; it appears that the grains are not depleted in the dark in this case. Cr coated 7059 glass makes an ohmic contact to n-type CdTe films. A Schottky diode formed with a 100A thick Au layer showed V/sub oc/ = 0.46 V, J/sub sc/ = 9 mA/cm/sup 2/ and a solar efficiency of about 2%. An n/p homojunction device was made by HWVE deposition of a 1.5 ..mu..m thick n-type CdTe layer on a p-type CdTe single crystal substrate. Values of V/sub oc/ = 0.73 V and J/sub sc/ = 0.24 mA/cm/sup 2/ were obtained. Grain boundary investigations showed the additive quality of two independent grain boundaries when measured in series, and tested the effects of passivation by Au, Cu, Li and H/sub 2/ in p-type CdTe grain boundaries, and In in n-type CdTe grain boundaries. Marked decreases in grain boundary resistance were observed after Li diffusion and H/sub 2/ diffusion in p-type CdTe.

Bube, R H

1982-01-01T23:59:59.000Z

122

CANGAROO-III OBSERVATION OF TeV GAMMA RAYS FROM THE VICINITY OF PSR B1706-44  

Science Conference Proceedings (OSTI)

Observation by the CANGAROO-III stereoscopic system of the Imaging Cherenkov Telescope has detected extended emission of TeV gamma rays in the vicinity of the pulsar PSR B1706-44. The strength of the signal observed as gamma-ray-like events varies when we apply different ways of emulating background events. The reason for such uncertainties is argued in relevance to gamma rays embedded in the 'OFF-source data', that is, unknown sources and diffuse emission in the Galactic plane, namely, the existence of a complex structure of TeV gamma-ray emission around PSR B1706-44.

Enomoto, R.; Kifune, T. [Institute for Cosmic Ray Research, University of Tokyo, Kashiwa, Chiba 277-8582 (Japan); Kushida, J.; Hattori, T.; Ishioka, H.; Kawachi, A. [Department of Physics, Tokai University, Hiratsuka, Kanagawa 259-1292 (Japan); Nakamori, T. [Department of Basic Physics, Tokyo Institute of Technology, Meguro, Tokyo, 152-8551 (Japan); Bicknell, G. V. [Research School of Astronomy and Astrophysics, Australian National University, ACT 2611 (Australia); Clay, R. W. [School of Chemistry and Physics, University of Adelaide, SA 5005 (Australia); Edwards, P. G. [Narrabri Observatory of the Australia Telescope National Facility, CSIRO, Epping, NSW 2121 (Australia); Gunji, S.; Inoue, K. [Department of Physics, Yamagata University, Yamagata 990-8560 (Japan); Hara, S. [Ibaraki Prefectural University of Health Sciences, Ami, Ibaraki 300-0394 (Japan); Hara, T. [Faculty of Management Information, Yamanashi Gakuin University, Kofu, Yamanashi 400-8575 (Japan); Hayashi, S.; Kajino, F. [Department of Physics, Konan University, Kobe, Hyogo 658-8501 (Japan); Higashi, Y.; Kabuki, S. [Department of Physics, Kyoto University, Sakyo-ku, Kyoto 606-8502 (Japan); Hirai, Y. [Faculty of Science, Ibaraki University, Mito, Ibaraki 310-8512 (Japan); Katagiri, H. [Department of Physical Science, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8526 (Japan)

2009-10-01T23:59:59.000Z

123

Bixbyite- and anatase-type phases in the system Sc-Ta-O-N  

Science Conference Proceedings (OSTI)

The aim of our study was to modify the basis compound ss-TaON, which crystallizes in the monoclinic baddeleyite-type, by incorporation of appropriate dopant ions, in order to obtain anion-deficient cubic fluorite-type phases, which are of interest as solids with mobile nitrogen ions. For this purpose, scandium-doped tantalum oxide nitrides were prepared by ammonolysis of amorphous oxide precursors. An unexpected variety of phases with different structural features was observed: bixbyite-type phases of general composition Sc{sub x}Ta{sub 1-x}(O,N){sub y} with 0.33{<=}x{<=}1 and 1.7{<=}y{<=}1.9, yellow colored metastable anatase-type phases such as Sc{sub 0.1}Ta{sub 0.9}O{sub 1.2}N{sub 0.8} or Sc{sub 0.15}Ta{sub 0.85}O{sub 1.3}N{sub 0.7} and, additionally, anosovite-type phases Sc{sub x}Ta{sub 3-x}O{sub 2x}N{sub 5-2x} with 0{<=}x{<=}1.05. Selected phases were investigated by UV/vis spectroscopy. Anatase- and anosovite-type compounds show brilliant colors. In the anatase-type phase, a possible anion ordering was examined by theoretical methods. Additionally, energy calculations on phase stability were performed for Sc{sub x}Ta{sub 1-x}O{sub 1+2x}N{sub 1-2x} in the baddeleyite, rutile, and anatase structure types with varying amounts of dopants. - Graphical abstract: New anatase- and bixbyite-type phases obtained as single-phase samples in the system Sc-Ta-O-N.

Stork, A.; Schilling, H. [Institut fuer Chemie, TU Berlin, Strasse des 17. Juni 135, D-10623 Berlin (Germany); Wessel, C.; Wolff, H. [Institut fuer Anorganische Chemie, RWTH Aachen, Landoltweg 1, D-52056 Aachen (Germany); Boerger, A. [Institut fuer Physikalische und Theoretische Chemie, TU Braunschweig, Hans-Sommer-Str. 10, D-38106 Braunschweig (Germany); Baehtz, C. [HASYLAB at DESY, Netkestr. 85, D-22603 Hamburg (Germany); Becker, K.-D. [Institut fuer Physikalische und Theoretische Chemie, TU Braunschweig, Hans-Sommer-Str. 10, D-38106 Braunschweig (Germany); Dronskowski, R. [Institut fuer Anorganische Chemie, RWTH Aachen, Landoltweg 1, D-52056 Aachen (Germany); Lerch, M., E-mail: lerch@chem.tu-berlin.d [Institut fuer Chemie, TU Berlin, Strasse des 17. Juni 135, D-10623 Berlin (Germany)

2010-09-15T23:59:59.000Z

124

Impurity Gettering Effect of Te Inclusions in Cdznte Single Crystals  

Science Conference Proceedings (OSTI)

The local impurity distribution in Te inclusions of CdZnTe (CZT) crystal was investigated by the time-of-flight secondary ion mass spectrometry (Tof-SIMS) technique. Direct evidence of impurity gettering in Te inclusions has been observed for the first time. The impurity gettering in Te inclusions originated from the diffusion mechanism during crystal growth and segregation mechanism during crystal cooling. This phenomenon is meaningful, because it reveals how Te inclusions affect CZT properties and provides a possible approach to reduce the impurities in CZT by the way of removing Te inclusions.

Yang, G.; Bolotnikov, A; Cui, Y; Camarda, G; Hossain, A; James, R

2009-01-01T23:59:59.000Z

125

Laser Ion Source Development at HRIBF  

Science Conference Proceedings (OSTI)

This report describes the efforts made to develop a resonant-ionization laser ion source based on tunable Ti:Sapphire lasers for nuclear physics and astrophysics research at HRIBF. Three Ti:Sapphire lasers have been upgraded with individual pump lasers to eliminate laser power losses due to synchronization delays. Ionization schemes for 14 elements have been obtained. Off-line studies show that the overall efficiency of the laser ion source can be as high as 40%. TaC surface coatings have been investigated for minimizing surface and bulk trapping of the atoms of interest.

Liu, Yuan [ORNL; Beene, James R [ORNL; Havener, Charles C [ORNL; Howe, Jane Y [ORNL; Kiggans, Jim [ORNL; Vane, C Randy [ORNL; Mattolat, C. [Johannes Gutenberg-Universitaet Mainz, Mainz, Germany; Gottwald, T. [Johannes Gutenberg-Universitaet Mainz, Mainz, Germany; Wendt, K. [Johannes Gutenberg-Universitaet Mainz, Mainz, Germany

2012-01-01T23:59:59.000Z

126

Defect and dopant properties of MgTa{sub 2}O{sub 6}  

Science Conference Proceedings (OSTI)

Atomistic computer simulation techniques have been used, for the first time, to reproduce the crystal structure of MgTa{sub 2}O{sub 6} and to investigate the defect chemistry and dopant properties of this material. The calculated defect energetics suggest that the concentration of intrinsic atomic defects in this phase is insignificant and that the system is probably stable to both oxidation and reduction. Dopant solution energy versus ion size trends are found for both isovalent and aliovalent dopant incorporation at Mg and Ta sites. Divalent dopants (e.g. Ca, Cu) preferentially occupy the Mg site whereas dopants with higher charge (e.g. Sc, Zr, Nb) are more favorable on the Ta site. High migration activation energies (>2eV) predict limited ionic conductivity in this material.

Tealdi, Cristina [Dipartimento di Chimica Fisica 'M. Rolla', Universita degli Studi di Pavia, Viale Taramelli, No. 16, PV 27100, Pavia (Italy); Saiful Islam, M. [Department of Chemistry, University of Surrey, Guildford, GU2 7XH (United Kingdom); Malavasi, Lorenzo [Dipartimento di Chimica Fisica 'M. Rolla', Universita degli Studi di Pavia, Viale Taramelli, No. 16, PV 27100, Pavia (Italy)]. E-mail: lorenzo.malavasi@unipv.it; Flor, Giorgio [Dipartimento di Chimica Fisica 'M. Rolla', Universita degli Studi di Pavia, Viale Taramelli, No. 16, PV 27100, Pavia (Italy)

2004-11-01T23:59:59.000Z

127

Search for ? + / EC double beta decay of 120 Te  

Science Conference Proceedings (OSTI)

We present a search for ? + / EC double beta decay of 120 Te performed with the CUORICINO experiment

C. Tomei; The CUORICINO Collaboration

2011-01-01T23:59:59.000Z

128

Second order incommensurate phase transition in 25L-Ta{sub 2}O{sub 5}  

SciTech Connect

A new structural state 25L-Ta{sub 2}O{sub 5}, obtained from sintering and annealing treatments of a Ta{sub 2}O{sub 5} powder, is identified both by electron diffraction and high resolution imaging on a transmission electron microscope (TEM). According to general rules for the different L-Ta{sub 2}O{sub 5} structures proposed by Grey et al. (J. Solid State Chem. 178 (2005) 3308), a structural model is derived from their crystallographic data on 19L-Ta{sub 2}O{sub 5}. This model yields simulated images in agreement with high resolution TEM observations of the structure oriented along its [001] zone axis, but only for a very thin crystal thickness of less than 1.2 nm. Such a limitation is shown to be due to a modulation of the structure along its [001] axis. Actually, from an analysis of a diffuse scattering and of its evolution into satellites reflections as a function of the cooling rate, a second order incommensurate phase transition can be assumed to occur in this compound. The property of single phase samples observed by TEM is also verified by X-ray powder diffraction. In a discussion about studies performed by different authors on incommensurate structures in the system Ta{sub 2}O{sub 5}-WO{sub 3}, it is noticed that TEM results, similar to ours, indicate that phase transitions could be expected in these structures. - Graphical Abstract: Electron diffraction patterns of [100] zone axis, showing a structural change of the 25L-Ta{sub 2}O{sub 5} phase through a variation of the cooling rate from 1000 {sup o}C.

Audier, M., E-mail: Marc.Audier@grenoble-inp.f [Laboratoire des Materiaux et du Genie Physique, UMR CNRS 5628, Minatec - INP Grenoble, 3 parvis Louis Neel, BP 257, 38016 Grenoble Cedex 1 (France); Chenevier, B.; Roussel, H. [Laboratoire des Materiaux et du Genie Physique, UMR CNRS 5628, Minatec - INP Grenoble, 3 parvis Louis Neel, BP 257, 38016 Grenoble Cedex 1 (France); Lintanf Salauen, A. [Tyndall National Institute Lee Maltings prospect row, Cork (Ireland)

2010-09-15T23:59:59.000Z

129

Novel Method for Growing Te-Inclusion-Free CZT  

Science Conference Proceedings (OSTI)

The authors propose a new method for growth of detector-grade CdZnTe (CZT) with reduced concentration and sizes of Te inclusions. The method is designed to impede the formation of Te-rich inclusions in crystals due to the use of new CZT growth method and a unique ampoule design.

Bolotnikov,A.

2008-06-17T23:59:59.000Z

130

Atmospheric Dispersion and Consequence Analysis at Sandia's TA-V Nuclear Facilities  

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

Atmospheric Dispersion and Atmospheric Dispersion and Consequence Analysis at Sandia's TA-V Nuclear Facilities Jim Dahl Manager, Nuclear Safety Analysis Sandia National Laboratories Office: 505-284-9067 Email: jjdahl@sandia.gov SAND2012-4478P Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy's National Nuclear Security Administration under contract DE-AC04-94AL85000. 2 Dispersion and Consequence Analysis at Sandia's TA-V Topics: * Site Characteristics * Dispersion Analysis Inputs - Meteorological Data - Stability Class - Dispersion Coefficients - Deposition Velocity

131

Preparation and investigation of the quaternary alloy CuTaInSe{sub 3}  

Science Conference Proceedings (OSTI)

Polycrystalline samples of the quaternary alloy CuTaInSe{sub 3} were prepared by the usual melt and anneal technique. The analysis of the diffraction pattern indicates a single phase which indexes as a tetragonal chalcopyrite-like structure with lattice parameters a = 5.7837 {+-} 0.0002 A; c = 11.6208 {+-} 0.0007 A and V = 389 {+-} 1 A{sup 3}. Differential thermal analysis shows that the melting transition of CuTaInSe{sub 3} is incongruent with large liquid + solids regions.

Grima-Gallardo, P. [Centro de Estudios en Semiconductores (CES), Dpto. Fisica, Facultad de Ciencias, La Hechicera, Merida (Venezuela)], E-mail: peg@ula.ve; Munoz, M.; Duran, S. [Centro de Estudios en Semiconductores (CES), Dpto. Fisica, Facultad de Ciencias, La Hechicera, Merida (Venezuela); Delgado, G.E. [Laboratorio de Cristalografia, Dpto. Quimica, Facultad de Ciencias, Universidad de Los Andes, Merida 5101 (Venezuela); Quintero, M.; Ruiz, J. [Centro de Estudios en Semiconductores (CES), Dpto. Fisica, Facultad de Ciencias, La Hechicera, Merida (Venezuela)

2007-12-04T23:59:59.000Z

132

Design and Test of a 100MW X Band TE01 Window  

Science Conference Proceedings (OSTI)

Research at Stanford Linear Accelerator Center (SLAC) is in progress on a TeV-scale linear collider that will operate at 5-10 times the energy of present generation accelerators. This will require development of high power X-Band sources generating 50-100 MW per source. Conventional pillbox window designs are capable of transmitting peak rf powers up to about 30 MW, well below the desired level required for the use of a single window per tube. SLAC has developed a 75 MW TE{sub 01} window [1] that uses a 'traveling wave' design to minimize fields at the window face. Irises match to the dielectric window impedance, resulting in a pure traveling wave in the ceramic and minimum fields on the window face. The use of the TE{sub 01} mode also has zero electric field on the braze fillet. Unfortunately, in-band resonances prevented this window design from achieving the desired 75MW power level. It was believed the resonances resulted from sudden steps in the circular guide to match the 38mm input diameter to the overmoded (TE{sub 01} and TE{sub 02} mode propagating) 65 mm diameter of the window ceramic. Calabazas Creek Research Inc. is currently developing a traveling wave window using compact, numerically optimized, parabolic tapers to match the input diameter of 38mm to the window ceramic diameter of 76mm (Figure 1). The design is projected to handle 100 MW of pulse power with a peak field at the window face of 3.6 MV/m. Cold test of the window has shown the return loss to be better than -25 dB over a 100 MHz bandwidth and to be resonance free (Figure 2). The window is scheduled for high-power testing in July 2003 at the SLAC.

Neilson, J.; Ives, L.; Tantawi, S.G.; /Calabazas Creek Res., Saratoga /SLAC

2008-03-24T23:59:59.000Z

133

ZnO-ZnTe Nanocone Heterojunctions  

Science Conference Proceedings (OSTI)

Semiconductor nanostructure heterojunctions are expected to be efficient structures for next-generation photovoltaic solar cells, radiation detectors, and light-emitting diodes. In this letter we report heterojunctions made of vertically aligned ZnO/ZnTe nanocones synthesized using a combination of thermal vapor deposition and pulsed-laser deposition (PLD). The ZnO nanocones and nanorods were synthesized as cores by utilizing the growth rate difference between central and boundary sites of precursor domains during thermal vapor deposition. The p-n heterojunctions were subsequently formed by growing ZnTe as shells on the nanocone surface using PLD. The ZnTe shells were polycrystalline structures, while ZnO cores were wurzite structures. The p-n junction of the nanocone core-shell structure exhibited I-V characteristics consistent with a p-n diode, but the nanorod junction did not. These structural and electric characteristics indicate that the ZnO nanocones are more feasible than ZnO nanorods as heterojunctions because the sloping facets of the nanocones facilitate deposition of ZnTe by PLD without the deleterious effects of shadowing. Furthermore, based on theoretical modeling of nanostructure heterojunctions, the nanocone-based junction exhibits an electrostatic potential profile that is much more effective for carrier transport than the electrostatic potential for the nanorod-based junction.

Lee, Sang Hyun [ORNL; Smith, Barton [ORNL; Zhang, Xiaoguang [ORNL; Seo, Sung Seok A [ORNL; Bell, Zane W [ORNL; Xu, Jun [ORNL

2010-01-01T23:59:59.000Z

134

Mechanism of terahertz photoconductivity in semimetallic HgTe/CdHgTe quantum wells  

Science Conference Proceedings (OSTI)

Terahertz photoconductivity in magnetic fields in semimetallic HgTe/CdHgTe quantum wells has been studied. The main contribution to photoconductivity comes from a signal that appears as a result of electron-gas heating. It is shown that, with the cyclotron resonance conditions satisfied, the photoconductivity signal is composed of cyclotron-resonance and bolometric components. However, in this case too, the bolometric contribution predominates.

Vasilyev, Yu. B., E-mail: yu.vasilyev@mail.ioffe.ru [Russian Academy of Sciences, Ioffe Physical-Technical Institute (Russian Federation); Mikhailov, N. N. [Russian Academy of Sciences, Rzhanov Institute of Semiconductor Physics, Siberian Branch (Russian Federation); Gouider, F. [Institut fuer Angewandte Physik (Germany); Vasilyeva, G. Yu. [St. Petersburg State Polytechnic University (Russian Federation); Nachtwei, G. [Institut fuer Angewandte Physik (Germany)

2012-05-15T23:59:59.000Z

135

THE PERFORMANCE OF THIN FILM SOLAR CELLS EMPLOYING PHOTOVOLTAIC Cu22014x Te-CdTe HETEROJUNCTIONS (1)  

E-Print Network (OSTI)

195 THE PERFORMANCE OF THIN FILM SOLAR CELLS EMPLOYING PHOTOVOLTAIC Cu22014x Te This paper is a short status report on the continuing development of Cu22014xTe-CdTe thin film solar cells thin film work. The most pressing current need is to determine how to extend cell life, particularly

Paris-Sud XI, Université de

136

Graduate Teaching Assistant Survey Rank each of the following items from the UM Physics Department TA ORIENTATION based  

E-Print Network (OSTI)

TA ORIENTATION based on how useful you think they were to your teaching preparation. 1. Presentation, and reading assignments during TA Orientation. What did you like or dislike about them? Was the workload, but it was not addressed during the orientation? 13. Please comment about each of the following speakers: Jennifer Engler

Minnesota, University of

137

Preferential orientation of Te precipitates in melt-grown CZT  

Science Conference Proceedings (OSTI)

Cadmium zinc telluride (Cd1-xZnxTe or CZT) has proved to be a useful material for semiconductor gamma-ray spectrometers and other electro-optic devices. It is often grown Te-rich to optimize its electrical characteristics, but this off-stoichiometric growth leads to the formation of semimetallic Te precipitates in the semiconducting host crystal. These precipitates can impair device performance and their formation needs to be inhibited, if possible, during growth. Characterization of melt-grown CZT has shown that Te precipitates are often faceted. In this study, characterization of several particles of different shapes revealed that most of the Te precipitates were preferentially oriented with the {101}CZT||{-12-10}Te . A secondary orientation relationship was also observed as {11-1}CZT||{01-11}Te for one of the {111}CZT family of planes. One of the particles exhibited {110}CZT||{01-10}Te and {001}CZT||{0001}Te . Precipitates were often found on {111}CZT twin boundaries and, in these cases, it was possible to assign specific orientations with respect to the twin plane. The expected orientation of the {0001}-plane of Te aligned with the {111}-plane of CZT was not observed even though a good lattice match is predicted in ab initio models. Observations of strained and polycrystalline Te precipitates are also discussed with relevance to the ab initio model and to impacts on electronic properties.

Henager, Charles H.; Edwards, Danny J.; Schemer-Kohrn, Alan L.; Bliss, Mary; Jaffe, John E.

2009-05-18T23:59:59.000Z

138

CdTe PV: Real and Perceived EHS Risks  

DOE Green Energy (OSTI)

As CdTe photovoltaics reached commercialization, questions have been raised about potential cadmium emissions from CdTe PV modules. Some have attacked the CdTe PV technology as unavoidably polluting the environment, and made comparisons of hypothetical emissions from PV modules to cadmium emissions from coal fired power plants. This paper gives an overview of the technical issues pertinent to these questions and further explores the potential of EHS risks during production, use and decommissioning of CdTe PV modules. The following issues are discussed: (a) The physical and toxicological properties of CdTe, (b) comparisons of Cd use in CdTe PV with its use in other technologies and products, and the (c) the possibility of CdTe releases from PV modules.

Fthenakis, V.; Zweibel, K.

2003-05-01T23:59:59.000Z

139

High-pressure shock behavior of WC and Ta2O5 powders.  

SciTech Connect

Planar shock experiments were conducted on granular tungsten carbide (WC) and tantalum oxide (Ta{sub 2}O{sub 5}) using the Z machine and a 2-stage gas gun. Additional shock experiments were also conducted on a nearly fully dense form of Ta{sub 2}O{sub 5}. The experiments on WC yield some of the highest pressure results for granular materials obtained to date. Because of the high distention of Ta{sub 2}O{sub 5}, the pressures obtained were significantly lower, but the very high temperatures generated led to large contributions of thermal energy to the material response. These experiments demonstrate that the Z machine can be used to obtain accurate shock data on granular materials. The data on Ta{sub 2}O{sub 5} were utilized in making improvements to the P-{lambda} model for high pressures; the model is found to capture the results not only of the Z and gas gun experiments but also those from laser experiments on low density aerogels. The results are also used to illustrate an approach for generating an equation of state using only the limited data coming from nanoindentation. Although the EOS generated in this manner is rather simplistic, for this material it gives reasonably good results.

Knudson, Marcus D. (Sandia National Laboratories, Albuquerque, NM); Reinhart, William Dodd (Sandia National Laboratories, Albuquerque, NM); Vogler, Tracy John; Root, Seth (Sandia National Laboratories, Albuquerque, NM)

2011-10-01T23:59:59.000Z

140

TA-55 Final Safety Analysis Report Comparison Document and DOE Safety Evaluation Report Requirements  

Science Conference Proceedings (OSTI)

This document provides an overview of changes to the currently approved TA-55 Final Safety Analysis Report (FSAR) that are included in the upgraded FSAR. The DOE Safety Evaluation Report (SER) requirements that are incorporated into the upgraded FSAR are briefly discussed to provide the starting point in the FSAR with respect to the SER requirements.

Alan Bond

2001-04-01T23:59:59.000Z

Note: This page contains sample records for the topic "ta te source" 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

Applied Reactor Physics TA RG E T AU D I E N C E  

E-Print Network (OSTI)

courses. Most production codes in reactor physics are accompanied with rather complete theory guides devoted to the study of interactions between neutrons and matter in a nuclear reactor. Such an interactionApplied Reactor Physics TA RG E T AU D I E N C E Applied Reactor Physics is designed for an audi

Meunier, Michel

142

The Use of TaBoRR as a Heavy Oil Upgrader  

SciTech Connect

Preliminary testing has shown that Western Research Institute's (WRI) Tank Bottom Recovery and Remediation (TaBoRR{reg_sign}) technology shows promise for heavy oil upgrading. Approximately 70 to 75 wt% of a Canadian Cold Lake bitumen feed was converted to a partially upgraded overhead product that could be transported directly by pipeline or blended with the parent bitumen to produce transportable crude. TaBoRR{reg_sign} was originally developed to remediate tank bottom wastes by producing a distillate product and solid waste. TaBoRR{reg_sign}'s processing steps include breaking a water-oil emulsion, recovering a light hydrocarbon fraction by distillation in a stripper unit, and pyrolyzing the residua reducing it to additional overhead and a benign coke for disposal. Cold Lake bitumen was tested in WRI's bench-scale equipment to evaluate the potential use of TaBoRR{reg_sign} technology for heavy oil upgrading to produce a stable, partially (or fully) upgraded product that will allow diluent-reduced or diluent-free transportation of bitumen or ultra-heavy crudes to market. Runs were conducted at temperatures of low, intermediate and high severity in the stripper to produce stripper overhead and bottoms. The bottoms from each of these runs were processed further in a 6-inch screw pyrolyzer to produce pyrolyzer overhead for blending with the corresponding stripper overheads. Proceeding in this fashion yielded three partially upgraded crudes. The products from TaBoRR{reg_sign} processing, the parent bitumen, and bitumen blends were subjected to stability and compatibility testing at the National Centre for Upgrading Technology (NCUT). Chemical analyses of the overhead product blends have met pipeline specifications for viscosity and density; however the bromine number does not, which might indicate the need for mild hydrotreating. Storage stability tests showed the blends to be stable. The blends were also soluble and compatible with most other Alberta crudes.

Lee Brecher; Charles Mones

2009-02-05T23:59:59.000Z

143

Spectroscopic Cathodoluminescence Studies of the ZnTe:Cu Contact Process for CdS/CdTe Solar Cells: Preprint  

DOE Green Energy (OSTI)

This conference paper describes the spectroscopic cathodoluminescence (CL), electron-beam induced current (EBIC), and capacitance-Voltage (C-V) measurements are used to study the formation of CdS/CdTe devices processed using ion-beam milling and a ZnTe:Cu/Ti contact. Results show heating in vacuum at {approx}360 C and ion-beam milling lead to observable changes in the CL emission from the CdCl2-treated CdTe surface. Changes in the CL spectrum are also observed as ZnTe:Cu layer thickness increases. These changes are correlated to published studies of defect levels and shown to be due, possibly, to an n-type region existing between the ZnTe:Cu contact interface and the p-CdTe layers. This n-type region is eliminated once a sufficiently thick ZnTe:Cu layer is produced.

Gessert, T. A.; Romero, M. J.; Johnston, S.; Keyes, B.; Dippo, P.

2002-05-01T23:59:59.000Z

144

Solar Energy Materials & Solar Cells 91 (2007) 17261732 Optical and structural properties of Ta2O5CeO2 thin films  

E-Print Network (OSTI)

Solar Energy Materials & Solar Cells 91 (2007) 1726­1732 Optical and structural properties of Ta2O5

Thirumalai, Devarajan

145

OBSERVATION OF TeV GAMMA RAYS FROM THE CYGNUS REGION WITH THE ARGO-YBJ EXPERIMENT  

SciTech Connect

We report the observation of TeV {gamma}-rays from the Cygnus region using the ARGO-YBJ data collected from 2007 November to 2011 August. Several TeV sources are located in this region including the two bright extended MGRO J2019+37 and MGRO J2031+41. According to the Milagro data set, at 20 TeV MGRO J2019+37 is the most significant source apart from the Crab Nebula. No signal from MGRO J2019+37 is detected by the ARGO-YBJ experiment, and the derived flux upper limits at the 90% confidence level for all the events above 600 GeV with medium energy of 3 TeV are lower than the Milagro flux, implying that the source might be variable and hard to be identified as a pulsar wind nebula. The only statistically significant (6.4 standard deviations) {gamma}-ray signal is found from MGRO J2031+41, with a flux consistent with the measurement by Milagro.

Bartoli, B.; Catalanotti, S. [Dipartimento di Fisica dell'Universita di Napoli 'Federico II', Complesso Universitario di Monte Sant'Angelo, via Cinthia, 80126 Napoli (Italy); Bernardini, P.; Bleve, C. [Dipartimento di Fisica dell'Universita del Salento, via per Arnesano, 73100 Lecce (Italy); Bi, X. J.; Cao, Z.; Chen, S. Z.; Chen, Y. [Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, Chinese Academy of Sciences, P.O. Box 918, 100049 Beijing (China); Bolognino, I. [Dipartimento di Fisica Nucleare e Teorica dell'Universita di Pavia, via Bassi 6, 27100 Pavia (Italy); Branchini, P.; Budano, A. [Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tre, via della Vasca Navale 84, 00146 Roma (Italy); Calabrese Melcarne, A. K. [Istituto Nazionale di Fisica Nucleare-CNAF, Viale Berti-Pichat 6/2, 40127 Bologna (Italy); Camarri, P. [Dipartimento di Fisica dell'Universita di Roma 'Tor Vergata', via della Ricerca Scientifica 1, 00133 Roma (Italy); Cardarelli, R. [Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tor Vergata, via della Ricerca Scientifica 1, 00133 Roma (Italy); Cattaneo, C. [Istituto Nazionale di Fisica Nucleare, Sezione di Pavia, via Bassi 6, 27100 Pavia (Italy); Chen, T. L. [Tibet University, 850000 Lhasa, Xizang (China); Creti, P. [Istituto Nazionale di Fisica Nucleare, Sezione di Lecce, via per Arnesano, 73100 Lecce (Italy); Cui, S. W. [Hebei Normal University, Shijiazhuang 050016, Hebei (China); Dai, B. Z. [Yunnan University, 2 North Cuihu Road, 650091 Kunming, Yunnan (China); D'Ali Staiti, G., E-mail: chensz@ihep.ac.cn [Dipartimento di Fisica e Tecnologie Relative, Universita degli Studi di Palermo, Viale delle Scienze, Edificio 18, 90128 Palermo (Italy); Collaboration: ARGO-YBJ Collaboration; and others

2012-02-15T23:59:59.000Z

146

Probing the Era of Galaxy Formation via TeV Gamma Ray Absorption by the Near Infrared Extragalactic Background  

E-Print Network (OSTI)

We present models of the extragalactic background light (EBL) based on several scenarios of galaxy formation and evolution. We have treated galaxy formation with the Press-Schecter approximation for both cold dark matter (CDM) and cold+hot dark matter (CHDM) models, representing a moderate ($z_f \\sim 3$) and a late ($z_f \\sim 1$) era of galaxy formation respectively. Galaxy evolution has been treated by considering a variety of stellar types, different initial mass functions and star formation histories, and with an accounting of dust absorption and emission. We find that the dominant factor influencing the EBL is the epoch of galaxy formation. A recently proposed method for observing the EBL utilizing the absorption of $\\sim 0.1$ to 10 TeV gamma-rays from active galactic nuclei (AGN) is shown to be capable of discriminating between different galaxy formation epochs. The one AGN viewed in TeV light, Mrk 421, does show some evidence for a cutoff above 3 TeV; based on the EBL models presented here, we suggest that this is due to extinction in the source. The large absorption predicted at energies $>200$ GeV for sources at $z>0.5$ indicates that observations of TeV gamma-ray bursts (GRB) would constrain or eliminate models in which the GRB sources lie at cosmological distances.

D. MacMinn; J. R. Primack

1995-04-11T23:59:59.000Z

147

Sources - CECM  

E-Print Network (OSTI)

help · annotate · Contents Next: References Up: RamanujanModular Equations, Previous: Ramanujan's sum. Sources. [Annotate] · [Shownotes]. References [7] ...

148

Engineering basis for selection of positron source material  

Science Conference Proceedings (OSTI)

This note describes the engineering basis for the selection of the positron source material. It assumes the approximate physics parameters have already been chosen (i.e. a high Z material of 6 radiation lengths thickness). As part of this study a basic heat transfer analysis of the target was performed and is discussed. It is concluded that Ta-10W is the most likely material to meet required physics parameters and not fail structurally.

Feerick, B.

1983-10-10T23:59:59.000Z

149

CdZnTe technology for gamma ray detectors  

Science Conference Proceedings (OSTI)

CdZnTe detector technology has been developed at NASA Goddard for imaging and spectroscopy applications in hard x-ray and gamma ray astronomy. A CdZnTe strip detector array with capabilities for arc second imaging and spectroscopy has been built as a prototype for a space flight gamma ray burst instrument. CdZnTe detectors also have applications for medical imaging

Carl Stahle; Jack Shi; Peter Shu; Scott Barthelmy; Ann Parsons; Steve Snodgrass

1998-01-01T23:59:59.000Z

150

Fabrication of stable, large-area, thin-film CdTe photovoltaic modules  

DOE Green Energy (OSTI)

Solar Cells, Inc (SCI) has a program to produce 60 cm X 120 cm solar modules based on CdTe films. The method of choice for semiconductor deposition is condensation from high temperature vapor's. Early work focussed on Close Spaced Sublimation and Chemical Vapor Deposition using elemental sources, but later equipment designs no longer strictly conform to either category. Small area efficiency has been confirmed by NREL at 9.3% on a 0.22 cm{sup 2} device (825 mV Voc, 18.2 mA/cm{sup 2} Jsc, and 0.62 FF) deposited on a 100 cm{sup 2} substrate. On 8 cell, 64 cm{sup 2} submodules, the best result to date is 7.3% (5.9 V Voc, 130 mA Isc, and 0.61 FF). CdS, CdTe, and ZnTe films have been deposited onto 60 cm X 120 cm substrates - single cells produced from this material have exceeded 8% efficiency, 64 cm{sup 2} submodules have exceeded 5%. Module efficiency is limited by mechanical defects - mostly shunts - associated with processing after deposition of the semiconductor layer's. Present best result is 1.4% total area efficiency. In anticipation of more advanced designs, CdTe films have also been deposited from apparatus employing elemental sources. This project is in an early stage and has produced only rudimentary results. A pro-active Safety, Health, Environmental and Disposal program has been developed. Results to date indicate that both employees and the environment have been protected against overexposure to hazards including toxic chemicals.

Nolan, J.F.; Meyers, P.V. (Solar Cells, Inc., Toledo, OH (United States))

1992-09-01T23:59:59.000Z

151

On the Origin of TeV Gamma-ray Emission from HESS J1834-087  

E-Print Network (OSTI)

We present an X-ray study of the field containing the extended TeV source HESS J1834-087 using data obtained with the XMM-Newton telescope. Previously, the coincidence of this source with both the shell-type supernova remnant (SNR) W41 and a giant molecular cloud (GMC) was interpreted as favoring pi^0-decay gamma-rays from interaction of the old SNR with the GMC. Alternatively, the TeV emission has been attributed to inverse Compton scattering from leptons deposited by PSR J1833-0827, a pulsar assumed to have been born in W41 but now located 24' from the center of the SNR (and the TeV source). Instead, we argue for a third possibility, that the TeV emission is powered by a previously unknown pulsar wind nebula located near the center of W41. The candidate pulsar is XMMU J183435.3-084443, a hard X-ray point source that lacks an optical counterpart to R>21 and is coincident with diffuse X-ray emission. The X-rays from both the point source and diffuse feature are evidently non-thermal and highly absorbed. A best fit power-law model yields photon index Gamma ~ 0.2 and Gamma ~ 1.9, for the point source and diffuse emission, respectively, and 2-10 keV flux ~ 5 X 10^(-13) ergs/cm^(2)/s for each. At the measured 4 kpc distance of W41, the observed X-ray luminosity implies an energetic pulsar with Edot ~ 10^(36)d_4^2 ergs/s, which is also sufficient to generate the observed gamma-ray luminosity of 2.7 X 10^(34)d_4^2 ergs/s via inverse Compton scattering.

R. Mukherjee; E. V. Gotthelf; J. P. Halpern

2008-10-09T23:59:59.000Z

152

Liquidus Projection of Thermoelectric Ag-Sn-Te Ternary System  

Science Conference Proceedings (OSTI)

Presentation Title, Liquidus Projection of Thermoelectric Ag-Sn-Te Ternary ... Ag Decorated Al Nanoparticles as Novel Ink Materials for Printed Electronics ...

153

Photo-degradation of methylene blue using Ta-doped ZnO nanoparticle  

SciTech Connect

A photocatalyst of Ta-doped ZnO was prepared by a modified Pechini-type method. The structural, morphological properties and photocatalytic activity of 1 mol % Ta-doped ZnO samples annealed at different temperatures were characterized. The photo-oxidation of methylene blue under the visible-light irradiation followed the pseudo-first-order kinetics according to the Langmuir-Hinshelwood model. It is found that the photocatalysis of 1% Ta-doped ZnO annealed at 700 {sup o}C showed excellent performance of the photodegradation of methylene blue, which was attributed to a competitive trade-off among the crystallinity, surface hydroxyl groups, and specific surface area. The processing parameter such as the pH value also played an important role in tuning the photocatalytic activity. The maximum photodecomposed rate was achieved at pH=8, and an novel model about the absorption of methylene blue on the surface of the catalysts was proposed. - Graphical abstract: This model describes the adsorption between the amphoteric behavior of the metal oxide and the cationic dye methylene blue (MB) on the surface of the catalyst at the acidic and alkaline condition.

Kong Jizhou [National Laboratory of Solid State Microstructures, Materials Science and Engineering Department, Nanjing University, Nanjing 210093 (China); Li Aidong, E-mail: adli@nju.edu.c [National Laboratory of Solid State Microstructures, Materials Science and Engineering Department, Nanjing University, Nanjing 210093 (China); Li Xiangyu; Zhai Haifa; Zhang Wenqi; Gong Youpin; Li Hui; Wu Di [National Laboratory of Solid State Microstructures, Materials Science and Engineering Department, Nanjing University, Nanjing 210093 (China)

2010-06-15T23:59:59.000Z

154

TIME DELAY OF CASCADE RADIATION FOR TeV BLAZARS AND THE MEASUREMENT OF THE INTERGALACTIC MAGNETIC FIELD  

SciTech Connect

Recent claims that the strength B{sub IGMF} of the intergalactic magnetic field (IGMF) is {approx}> 10{sup -15} G are based on upper limits to the expected cascade flux in the GeV band produced by blazar TeV photons absorbed by the extragalactic background light. This limit depends on an assumption that the mean blazar TeV flux remains constant on timescales {approx}> 2(B{sub IGMF}/10{sup -18}G){sup 2}/(E/10 GeV){sup 2} yr for an IGMF coherence length {approx}1 Mpc, where E is the measured photon energy. Restricting TeV activity of 1ES 0229+200 to {approx}3-4 years during which the source has been observed leads to a more robust lower limit of B{sub IGMF} {approx}> 10{sup -18} G, which can be larger by an order of magnitude if the intrinsic source flux above {approx}5-10 TeV from 1ES 0229+200 is strong.

Dermer, Charles D.; Razzaque, Soebur; Finke, Justin D. [Space Science Division, U.S. Naval Research Laboratory, Washington, DC 20375 (United States); Cavadini, Massimo [Dipartimento di Fisica e Matematica, Universita dell'Insubria, via Valleggio 11, 22100, Como (Italy); Chiang, James [W. W. Hansen Experimental Physics Laboratory, Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics and SLAC National Accelerator Laboratory, Stanford University, Stanford, CA 94305 (United States); Lott, Benoit, E-mail: charles.dermer@nrl.navy.mil [CNRS/IN2P3, Centre d' Etudes Nucleaires Bordeaux Gradignan, UMR 5797, Gradignan, 33175 (France)

2011-06-01T23:59:59.000Z

155

X-ray luminescence of CdTe quantum dots in LaF{sub 3}:Ce/CdTe nanocomposites  

Science Conference Proceedings (OSTI)

CdTe quantum dots have intense photoluminescence but exhibit almost no x-ray luminescence. However, intense x-ray luminescence from CdTe quantum dots is observed in LaF{sub 3}:Ce/CdTe nanocomposites. This enhancement in the x-ray luminescence of CdTe quantum dots is attributed to the energy transfer from LaF{sub 3}:Ce to CdTe quantum dots in the nanocomposites. The combination of LaF{sub 3}:Ce nanoparticles and CdTe quantum dots makes LaF{sub 3}:Ce/CdTe nanocomposites promising scintillators for radiation detection.

Hossu, Marius; Liu Zhongxin; Yao Mingzhen; Ma Lun; Chen Wei

2012-01-02T23:59:59.000Z

156

Development of a simultaneous Hugoniot and temperature measurement for preheated-metal shock experiments: Melting temperatures of Ta at pressures of 100 GPa  

Science Conference Proceedings (OSTI)

Equations of state of metals are important issues in earth science and planetary science. A major limitation of them is the lack of experimental data for determining pressure-volume and temperature of shocked metal simultaneously. By measuring them in a single experiment, a major source of systematic error is eliminated in determining from which shock pressure release pressure originates. Hence, a non-contact fast optical method was developed and demonstrated to simultaneously measure a Hugoniot pressure-volume (P{sub H}-V{sub H}) point and interfacial temperature T{sub R} on the release of Hugoniot pressure (P{sub R}) for preheated metals up to 1000 K. Experimental details in our investigation are (i) a Ni-Cr resistance coil field placed around the metal specimen to generate a controllable and stable heating source, (ii) a fiber-optic probe with an optical lens coupling system and optical pyrometer with ns time resolution to carry out non-contact fast optical measurements for determining P{sub H}-V{sub H} and T{sub R}. The shock response of preheated tantalum (Ta) at 773 K was investigated in our work. Measured data for shock velocity versus particle velocity at an initial state of room temperature was in agreement with previous shock compression results, while the measured shock data between 248 and 307 GPa initially heated to 773 K were below the Hugoniot evaluation from its off-Hugoniot states. Obtained interfacial temperatures on release of Hugoniot pressures (100-170 GPa) were in agreement with shock-melting points at initial ambient condition and ab initio calculations of melting curve. It indicates a good consistency for shock melting data of Ta at different initial temperatures. Our combined diagnostics for Hugoniot and temperature provides an important approach for studying EOS and the temperature effect of shocked metals. In particular, our measured melting temperatures of Ta address the current controversy about the difference by more than a factor of 2 between the melting temperatures measured under shock and those measured in a laser-heated diamond anvil cell at {approx}100 GPa.

Li Jun; Zhou Xianming; Li Jiabo; Wu Qiang; Cai Lingcang; Dai Chengda [National Key Laboratory for Shock Wave and Detonation Physics, Institute of Fluid Physics, P.O. Box 919-102, Mianyang, 621900 (China)

2012-05-15T23:59:59.000Z

157

Ion source  

DOE Patents (OSTI)

A magnetic filter for an ion source reduces the production of undesired ion species and improves the ion beam quality. High-energy ionizing electrons are confined by the magnetic filter to an ion source region, where the high-energy electrons ionize gas molecules. One embodiment of the magnetic filter uses permanent magnets oriented to establish a magnetic field transverse to the direction of travel of ions from the ion source region to the ion extraction region. In another embodiment, low energy 16 eV electrons are injected into the ion source to dissociate gas molecules and undesired ion species into desired ion species.

Leung, Ka-Ngo (Hercules, CA); Ehlers, Kenneth W. (Alamo, CA)

1984-01-01T23:59:59.000Z

158

Pl-Cns-00-006 I In Nt Te Er Ri Im M S Si It Te E S St Ta Ab Bi Il Li Iz Za At Ti Io On N  

E-Print Network (OSTI)

This document is a revision and update of the 1999 Closure Plan. CNS has provided this update to make the document consistent with the Atlantic Interstate Low-level Radioactive Waste Compact Implementation Act (S1129), which became law effective July 1, 2000. The Closure Plan reviews major aspects of the Barnwell site's operations and outlines plans for facility closure, post-closure observation, and long-term care. S1129 establishes time frames for operations upon which this plan is structured. CNS has designed its approach for closure to be consistent with these time frames as shown on Figure 1-1

An Nd Cl

2000-01-01T23:59:59.000Z

159

Excited quark production at a 100 TeV VLHC  

E-Print Network (OSTI)

I look for a dijet resonance produced by an excited quark q* in a simulated sample corresponding to 3 ab^{-1} of pp collisions at $\\sqrt{s} = 100$ TeV. Using a cut and count analysis approach I demonstrate the potential to explore q* masses up to 50 TeV, corresponding to a length scale of around 4 am.

Jacob Anderson

2013-09-03T23:59:59.000Z

160

Excited quark production at a 100 TeV VLHC  

E-Print Network (OSTI)

I look for a dijet resonance produced by an excited quark q* in a simulated sample corresponding to 3 ab^{-1} of pp collisions at $\\sqrt{s} = 100$ TeV. Using a cut and count analysis approach I am able to explore q* masses up to 50 TeV, corresponding to a length scale of around 4 am.

Anderson, Jacob

2013-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ta te source" 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

Time dependent modelisation of TeV blazars by a stratified jet model  

E-Print Network (OSTI)

We present a new time-dependent inhomogeneous jet model of non-thermal blazar emission. Ultra-relativistic leptons are injected at the base of a jet and propagate along it. We assume continuous reacceleration and cooling, producing a relativistic quasi-maxwellian (or "pile-up") particle energy distribution. The synchrotron and Synchrotron-Self Compton jet emissivity are computed at each altitude. Klein-Nishina effects as well as intrinsic gamma-gamma absorption are included in the computation. Due to the pair production optical depth, considerable particle density enhancement can occur, particularly during flaring states.Time-dependent jet emission can be computed by varying the particle injection, but due to the sensitivity of pair production process, only small variations of the injected density are required during the flares. The stratification of the jet emission, together with a pile-up distribution, allows significantly lower bulk Lorentz factors, compared to one-zone models. Applying this model to the case of PKS 2155-304 and its big TeV flare observed in 2006, we can reproduce simultaneously the average broad band spectrum of this source from radio to TeV, as well as TeV light curve of the flare with bulk Lorentz factor lower than 15.

Timothé Boutelier; Gilles Henri; Pierre-Olivier Petrucci

2008-10-01T23:59:59.000Z

162

An inhomogeneous jet model for the rapid variability of TeV blazars  

E-Print Network (OSTI)

We present a new time-dependent inhomogeneous jet model of non-thermal blazar emission, which reproduces the entire spectral energy distribution together with the rapid gamma-ray variability. Ultra-relativistic leptons are injected at the base of a jet and propagate along the jet structure. We assume continuous reacceleration and cooling, producing a relativistic quasi-maxwellian (or "pile-up") particle energy distribution. The synchrotron and Synchrotron-Self Compton jet emissivity are computed at each altitude. Klein-Nishina effects as well as intrinsic gamma-gamma absorption are included in the computation. Due to the pair production optical depth, considerable particle density enhancement can occur, particularly during flaring states. Time-dependent jet emission can be computed by varying the particle injection, but due to the sensitivity of pair production process, only small variations of the injected density are required during the flares. The stratification of the jet emission, together with a pile-up distribution, allows significantly lower bulk Lorentz factors, compared to one-zone models. Applying this model to the case of PKS2155-304 and its big TeV flare observed in 2006, we can reproduce simultaneously the average broad band spectrum of this source as well as the TeV spectra and TeV light curve of the flare with bulk Lorentz factor lower than 15.

Timothé Boutelier; Gilles Henri; Pierre-Olivier Petrucci

2008-07-31T23:59:59.000Z

163

Effect of Te Inclusions on the Performance of Cdznte Radiation Detectors  

Science Conference Proceedings (OSTI)

Te inclusions existing at high concentrations in CdZnTe (CZT) material can degrade the performance of CZT detectors. These microscopic defects trap the free electrons generated by incident radiation, so entailing significant fluctuations in the total collected charge and thereby strongly affecting the energy resolution of thick (long-drift) detectors. Such effects were demonstrated in thin planar detectors, and, in many cases, they proved to be the dominant cause of the low performance of thick detectors, wherein the fluctuations in the charge losses accumulate along the charge's drift path. We continued studying this effect using different tools and techniques. We employed a dedicated beamline recently established at BNL's National Synchrotron Light Source for characterizing semiconductor radiation detectors, along with an IR transmission microscope system, the combination of which allowed us to correlate the concentration of defects with the devices' performances. We present here our new results from testing over 50 CZT samples grown by different techniques. Our goals are to establish tolerable limits on the size and concentrations of these detrimental Te inclusions in CZT material, and to provide feedback to crystal growers to reduce their numbers in the material.

Bolotnikov, A.; Abdul-Jabbar, N; Babalola, O; Camarda, G; Cui, Y; Hossain, A; Jackson, E; Jackson, H; James, J; et. al.

2009-01-01T23:59:59.000Z

164

DEVELOPMENT OF CdZnTe RADIATION DETECTORS  

Science Conference Proceedings (OSTI)

Cadmium Zinc Telluride (CdZnTe or CZT) is a very attractive material for room-temperature semiconductor detectors because of its wide band-gap and high atomic number. Despite these advantages, CZT still presents some material limitations and poor hole mobility. In the past decade most of the developing CZT detectors focused on designing different electrode configurations, mainly to minimize the deleterious effect due to the poor hole mobility. A few different electrode geometries were designed and fabricated, such as pixelated anodes and Frisch-grid detectors developed at Brookhaven National Lab (BNL). However, crystal defects in CZT materials still limit the yield of detector-grade crystals, and, in general, dominate the detector's performance. In the past few years, our group's research extended to characterizing the CZT materials at the micro-scale, and to correlating crystal defects with the detector's performance. We built a set of unique tools for this purpose, including infrared (IR) transmission microscopy, X-ray micro-scale mapping using synchrotron light source, X-ray transmission- and reflection-topography, current deep level transient spectroscopy (I-DLTS), and photoluminescence measurements. Our most recent work on CZT detectors was directed towards detailing various crystal defects, studying the internal electrical field, and delineating the effects of thermal annealing on improving the material properties. In this paper, we report our most recent results.

BOLOTNIKOV, A.; CAMARDA, G.; HOSSAIN, A.; KIM, K.H.; YANG, G.; GUL, R.; CUI, Y.; AND JAMES, R.B.

2011-10-23T23:59:59.000Z

165

Investigation of Charge Transport Properties of CdZnTe Detectors with Synchrotron X-ray Radiation  

Science Conference Proceedings (OSTI)

Various internal defects, such as Te inclusions, twin boundaries, dislocation, etc., are prevalent in as-grown CdZnTe (CZT) crystals, which affect the charge transport properties of CZT crystals and, therefore, worsen the performance of CZT detectors. In order to develop high quality CZT detectors, it is imperative to clarify the effects of internal defects on the charge transport properties of CZT. Simple flood illumination with nuclear radiation source cannot reveal the nature of highly localized defects in CZT. Therefore, at Brookhaven's National Synchrotron Light Source (NSLS), we have developed a unique testing system for micro-scale defect investigation of CZT, which employs an X-ray beam collimated with the spatial resolution as small as 3 x 3 {micro}m{sup 2}, a microscopic size comparable to the scale of common defects in CZT. This powerful tool enables us to investigate the effect of internal defects on charge transport properties of CZT in detail.

Yang,G.; Bolotnikov, A.E.; Camarda, G.S.; Cui, Y.; Hossain, A.; James, R.B.

2008-10-19T23:59:59.000Z

166

Laser irradiation effects on the CdTe/ZnTe quantum dot structure studied by Raman and AFM spectroscopy  

SciTech Connect

Micro-Raman spectroscopy has been applied to investigate the impact of laser irradiation on semiconducting CdTe/ZnTe quantum dots (QDs) structures. A reference sample (without dots) was also studied for comparison. Both samples were grown by molecular beam epitaxy technique on the p-type GaAs substrate. The Raman spectra have been recorded for different time of a laser exposure and for various laser powers. The spectra for both samples exhibit peak related to the localized longitudinal (LO) ZnTe phonon of a wavenumber equal to 210 cm{sup -1}. For the QD sample, a broad band corresponding to the LO CdTe phonon related to the QD-layer appears at a wavenumber of 160 cm{sup -1}. With increasing time of a laser beam exposure and laser power, the spectra get dominated by tellurium-related peaks appearing at wavenumbers around 120 cm{sup -1} and 140 cm{sup -1}. Simultaneously, the ZnTe surface undergoes rising damage, with the formation of Te aggregates at the pinhole edge as reveal atomic force microscopy observations. Local temperature of irradiated region has been estimated from the anti-Stokes/Stokes ratio of the Te modes intensity and it was found to be close or exceeding ZnTe melting point. Thus, the laser damage can be explained by the ablation process.

Zielony, E.; Placzek-Popko, E.; Henrykowski, A.; Gumienny, Z.; Kamyczek, P.; Jacak, J. [Institute of Physics, Wroclaw University of Technology, Wybrzeze Wyspianskiego 27, 50-370 Wroclaw (Poland); Nowakowski, P.; Karczewski, G. [Institute of Physics, Polish Academy of Sciences, al. Lotnikow 32/46, 02-668 Warsaw (Poland)

2012-09-15T23:59:59.000Z

167

Experimental observation of nonspherically-decaying radiation from a rotating superluminal source  

E-Print Network (OSTI)

, United Kingdom J. Singleton National High Magnetic Field Laboratory, TA-35, MS-E536, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 H. Ardavan Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, United Kingdom... of (retarded) source time. Consequently, the intensity of the radiation in the direction of these cusps declines more slowly with in- creasing distance from the source than would the emis- sion from a conventional antenna. Note, however, that energy...

Ardavan, A; Hayes, W; Singleton, J; Ardavan, H; Fopma, J; Halliday, D

2004-10-15T23:59:59.000Z

168

Competitive Sourcing  

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

COMPETITIVE SOURCING COMPETITIVE SOURCING ▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬▬ Report on Competitive Sourcing Results Fiscal Year 2006 May 2007 Executive Office of the President Office of Management and Budget TABLE OF CONTENTS Executive Summary ...................................................................................... 1 Introduction................................................................................................. 4 I. The big picture ......................................................................................... 4 II. How public-private competition was used in FY 2006 .................................... 6 A. Anticipated benefits from competition in FY 2006

169

Laser ion source development at Holifield Radioactive Ion Beam Facility  

Science Conference Proceedings (OSTI)

This report describes the efforts made to develop a resonant-ionization laser ion source based on tunable Ti:sapphire lasers for nuclear physics and astrophysics research at Holifield Radioactive Ion Beam Facility. Three Ti:sapphire lasers have been upgraded with individual pump lasers to eliminate laser power losses due to synchronization delays. Ionization schemes for 14 elements have been obtained. Off-line studies show that the overall efficiency of the laser ion source can be as high as 40%. TaC surface coatings have been investigated for minimizing surface and bulk trapping of the atoms of interest.

Liu, Y.; Havener, C. C.; Beene, J. R. [Physics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States); Gottwald, T.; Mattolat, C.; Vane, C. R.; Wendt, K. [Institute of Physics, University of Mainz, D-55099 Mainz (Germany); Howe, J. Y.; Kiggans, J. [Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)

2012-02-15T23:59:59.000Z

170

Use of separate ZnTe interface layers to form OHMIC contacts to p-CdTe films  

DOE Patents (OSTI)

A method of improving electrical contact to a thin film of a p-type tellurium-containing II-VI semiconductor comprising: depositing a first undoped layer of ZnTe on a thin film of p-type tellurium containing II-VI semiconductor with material properties selected to limit the formation of potential barriers at the interface between the p-CdTe and the undoped layer, to a thickness sufficient to control diffusion of the metallic-doped ZnTe into the p-type tellurim-containing II-VI semiconductor, but thin enough to minimize affects of series resistance; depositing a second heavy doped p-type ZnTe layer to the first layer using an appropriate dopant; and depositing an appropriate metal onto the outer-most surface of the doped ZnTe layer for connecting an external electrical conductor to an ohmic contact.

Gessert, Timothy A. (Conifer, CO)

1999-01-01T23:59:59.000Z

171

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

172

NEUTRON SOURCES  

DOE Patents (OSTI)

A neutron source is obtained without employing any separate beryllia receptacle, as was formerly required. The new method is safer and faster, and affords a source with both improved yield and symmetry of neutron emission. A Be container is used to hold and react with Pu. This container has a thin isolating layer that does not obstruct the desired Pu--Be reaction and obviates procedures previously employed to disassemble and remove a beryllia receptacle. (AEC)

Richmond, J.L.; Wells, C.E.

1963-01-15T23:59:59.000Z

173

Scanning tunneling microscopy of charge density wave structure in 1T- TaS sub 2  

SciTech Connect

I have used a scanning tunneling microscope (STM) to image simultaneously the atomic lattice and the charge density wave (CDW) superstructure in tantalum disulfide (1T-TaS{sub 2}) over the temperature range of 370-77K. In the lowest temperature (commensurate) phase, present below 180K, the CDW is at an angle of 13.9{degrees} relative to the lattice and is uniformly commensurate. In the incommensurate phase, present above 353K, the CDW is aligned with the lattice. 1T-TaS{sub 2} exhibits two other phases; the triclinic (T) phase which is present between 223K and 283K upon warming the sample, and the nearly-commensurate (NC) phase which is present between 353K and 180K upon cooling the sample and between 283K and 353K upon warming the sample. In both of these phases, discommensurate models where the CDW is arranged in small commensurate domains have been proposed. In the NC phase the CDW is rotated between 10{degrees} and 12.5{degrees} relative to the atomic lattice. Such a rotated CDW would create an interference pattern with the underlying atomic lattice regardless of the existence of a true domain superstructure. Previous work on 1T-TaS{sub 2} has not adequately accounted for the possibility of this moire pattern. However, around each fundamental CDW peak in the Fourier transform of the real space STM images, several satellite spots are visible, which conclusively prove the existence of domains in the NC phase.

Thomson, R.E.

1991-11-01T23:59:59.000Z

174

Scanning tunneling microscopy of charge density wave structure in 1T- TaS{sub 2}  

SciTech Connect

I have used a scanning tunneling microscope (STM) to image simultaneously the atomic lattice and the charge density wave (CDW) superstructure in tantalum disulfide (1T-TaS{sub 2}) over the temperature range of 370-77K. In the lowest temperature (commensurate) phase, present below 180K, the CDW is at an angle of 13.9{degrees} relative to the lattice and is uniformly commensurate. In the incommensurate phase, present above 353K, the CDW is aligned with the lattice. 1T-TaS{sub 2} exhibits two other phases; the triclinic (T) phase which is present between 223K and 283K upon warming the sample, and the nearly-commensurate (NC) phase which is present between 353K and 180K upon cooling the sample and between 283K and 353K upon warming the sample. In both of these phases, discommensurate models where the CDW is arranged in small commensurate domains have been proposed. In the NC phase the CDW is rotated between 10{degrees} and 12.5{degrees} relative to the atomic lattice. Such a rotated CDW would create an interference pattern with the underlying atomic lattice regardless of the existence of a true domain superstructure. Previous work on 1T-TaS{sub 2} has not adequately accounted for the possibility of this moire pattern. However, around each fundamental CDW peak in the Fourier transform of the real space STM images, several satellite spots are visible, which conclusively prove the existence of domains in the NC phase.

Thomson, R.E.

1991-11-01T23:59:59.000Z

175

EquilTheTA: Thermodynamic and transport properties of complex equilibrium plasmas  

SciTech Connect

EquilTheTA (EQUILibrium for plasma THErmodynamics and Transport Applications) is a web-based software which calculates chemical equilibrium product concentrations from any set of reactants and determines thermodynamic and transport properties for the product mixture in wide temperature and pressure ranges. The program calculates chemical equilibrium by using a hierarchical approach, thermodynamic properties and transport coefficients starting from recent and accurate databases of atomic and molecular energy levels and collision integrals. In the calculations, Debye length and cut-off are consistently updated and virial corrections (up to third order) can be considered. Transport coefficients are calculated by using high order approximations of the Chapman-Enskog method.

Colonna, G.; D'Angola, A. [CNR-IMIP Bari, via Amendola 122/D - 70126 Bari (Italy); DIFA, Universita della Basilicata, via dell'Ateneo Lucano, 1085100 Potenza (Italy)

2012-11-27T23:59:59.000Z

176

Model for projectile fragmentation: case study for Ni on Ta, Be and Xe on Al  

E-Print Network (OSTI)

For projectile fragmentation we work out details of a model whose origin can be traced back to the Bevalac era. The model positions itself between the phenomenological EPAX parametrization and microscopic transport models like "Heavy Ion Phase Space Exploration Model" (HIPSE) and antisymmetrised molecular dynamics(AMD). We apply the model to some recent data of projectile fragmentation of Ni on Ta and Be at beam energy 140 MeV/nucleon and some older data of Xe on Al at beam energy 790 MeV/nucleon. Reasonable values of cross-sections for various composites populated in the reactions are obtained.

S. Mallik; G. Chaudhuri; S. Das Gupta

2010-12-30T23:59:59.000Z

177

SiC MOSFETs with thermally oxidized Ta2Si stacked on SiO2 as high-k gate insulator  

Science Conference Proceedings (OSTI)

In this paper, we compare the electrical characteristics of MOS capacitors and lateral MOSFETs with oxidized Ta"2Si (O-Ta"2Si) as a high-k dielectric on silicon carbide or stacked on thermally grown SiO"2 on SiC. MOS capacitors are used to determine ... Keywords: High-k dielectric, MOSFET, Oxidation, SiC, Ta2Si, Tantalum silicide

A. Pérez-Tomás; M. R. Jennings; P. M. Gammon; G. J. Roberts; P. A. Mawby; J. Millán; P. Godignon; J. Montserrat; N. Mestres

2008-04-01T23:59:59.000Z

178

Process Development for High Voc CdTe Solar Cells  

DOE Green Energy (OSTI)

This is a cumulative and final report for Phases I, II and III of this NREL funded project (subcontract # XXL-5-44205-10). The main research activities of this project focused on the open-circuit voltage of the CdTe thin film solar cells. Although, thin film CdTe continues to be one of the leading materials for large-scale cost-effective production of photovoltaics, the efficiency of the CdTe solar cells have been stagnant for the last few years. This report describes and summarizes the results for this 3-year research project.

Ferekides, C. S.; Morel, D. L.

2011-05-01T23:59:59.000Z

179

Competitive Sourcing  

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

Competitive Sourcing Competitive Sourcing The Department of Energy's (DOE) Competitive Sourcing program is a management initiative aimed at improving DOE's performance and reducing the Department's operational costs. The program is governed by Office of Management and Budget (OMB) Circular A- 76, Performance of Commercial Activities, dated May 29, 2003. The commercial activities selected for review and competition include functions performed by government employees that are readily available in the private sector, and where the potential for efficiencies, regardless of the winning provider, are highly likely. The candidate functions are chosen from the Department's annual Federal Activities Inventory Reform (FAIR) Act Inventory and subjected to a feasibility review to determine if a prudent business case can be made to enter

180

Neutron source  

DOE Patents (OSTI)

A neutron source which is particularly useful for neutron radiography consists of a vessel containing a moderating media of relatively low moderating ratio, a flux trap including a moderating media of relatively high moderating ratio at the center of the vessel, a shell of depleted uranium dioxide surrounding the moderating media of relatively high moderating ratio, a plurality of guide tubes each containing a movable source of neutrons surrounding the flux trap, a neutron shield surrounding one part of each guide tube, and at least one collimator extending from the flux trap to the exterior of the neutron source. The shell of depleted uranium dioxide has a window provided with depleted uranium dioxide shutters for each collimator. Reflectors are provided above and below the flux trap and on the guide tubes away from the flux trap.

Cason, J.L. Jr.; Shaw, C.B.

1975-10-21T23:59:59.000Z

Note: This page contains sample records for the topic "ta te source" 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

ION SOURCE  

DOE Patents (OSTI)

The ion source described essentially eliminater the problem of deposits of nonconducting materials forming on parts of the ion source by certain corrosive gases. This problem is met by removing both filament and trap from the ion chamber, spacing them apart and outside the chamber end walls, placing a focusing cylinder about the filament tip to form a thin collimated electron stream, aligning the cylinder, slits in the walls, and trap so that the electron stream does not bombard any part in the source, and heating the trap, which is bombarded by electrons, to a temperature hotter than that in the ion chamber, so that the tendency to build up a deposit caused by electron bombardment is offset by the extra heating supplied only to the trap.

Leland, W.T.

1960-01-01T23:59:59.000Z

182

Formation of ZnTe:Cu/Ti Contacts at High Temperature for CdS/CdTe Devices: Preprint  

DOE Green Energy (OSTI)

We study the performance of CdS/CdTe thin-film devices contacted with ZnTe:Cu/Ti of various thickness at a higher-than-optimum temperature of {approx}360 C. At this temperature, optimum device performance requires the same thickness of ZnTe:Cu as for similar contacts formed at a lower temperature of 320 C. C-V analysis indicates that a ZnTe:Cu layer thickness of {approx}< 0.5 mu m does not yield the degree of CdTe net acceptor concentration necessary to reduce space charge width to its optimum value for n-p device operation. The thickest ZnTe:Cu layer investigated (1 mu m) yields the highest CdTe net acceptor concentration, lowest value of Jo, and highest Voc. However, performance is limited for this device by poor fill factor. We suggest poor fill factor is due to Cu-related acceptors compensating donors in CdS.

Gessert, T. A.; Asher, S.; Johnston, S.; Duda, A.; Young, M. R.; Moriarty, T.

2006-05-01T23:59:59.000Z

183

RADIATION SOURCES  

DOE Patents (OSTI)

A novel long-lived source of gamma radiation especially suitable for calibration purposes is described. The source of gamma radiation is denoted mock iodine131, which comprises a naixture of barium-133 and cesium-137. The barium and cesium are present in a barium-cesium ratio of approximately 5.7/1 to 14/1, uniformly dispersed in an ion exchange resin and a filter surrounding the resin comprised of a material of atomic number below approximately 51, and substantially 0.7 to 0.9 millimeter thick.

Brucer, M.H.

1958-04-15T23:59:59.000Z

184

NEUTRON SOURCE  

DOE Patents (OSTI)

A neutron source of the antimony--beryllium type is presented. The source is comprised of a solid mass of beryllium having a cylindrical recess extending therein and a cylinder containing antimony-124 slidably disposed within the cylindrical recess. The antimony cylinder is encased in aluminum. A berylliunn plug is removably inserted in the open end of the cylindrical recess to completely enclose the antimony cylinder in bsryllium. The plug and antimony cylinder are each provided with a stud on their upper ends to facilitate handling remotely.

Reardon, W.A.; Lennox, D.H.; Nobles, R.G.

1959-01-13T23:59:59.000Z

185

Development of Ta-based Superconducting Tunnel Junction X-ray Detectors for Fluorescence XAS  

SciTech Connect

We are developing superconducting tunnel junction (STJ) soft X-ray detectors for chemical analysis of dilute samples by fluorescence-detected X-ray absorption spectroscopy (XAS). Our 36-pixel Nb-based STJ spectrometer covers a solid angle {Omega}/4{pi} {approx} 10{sup -3}, offers an energy resolution of {approx}10-20 eV FWHM for energies up to {approx}1 keV, and can be operated at total count rates of {approx}10{sup 6} counts/s. For increased quantum efficiency and cleaner response function, we have now started the development of Ta-based STJ detector arrays. Initial devices modeled after our Nb-based STJs have an energy resolution below 10 eV FWHM for X-ray energies below 1 keV, and pulse rise time discrimination can be used to improve their response function for energies up to several keV. We discuss the performance of the Ta-STJs and outline steps towards the next-generation of large STJ detector arrays with higher sensitivity.

Friedrich, S; Drury, O; Hall, J; Cantor, R

2009-09-23T23:59:59.000Z

186

Environmenal analysis of the Bayo Canyon (TA-10) Site, Los Alamos, New Mexico  

SciTech Connect

The radiological survey of the old TA-10 site in Bayo Canyon found low levels of surface contamination in the vicinity of the firing sites and subsurface contamination in the old waste disposal area. The three alternatives proposed for the site are: (1) to take no action; (2) to restrict usage of the area of subsurface contamination to activities that cause no subsurface disturbance (minimal action); and (3) to remove the subsurface conamination to levels below the working criteria. Dose calculations indicate that doses from surface contamination for recreational users of the canyon, permanent residents, and construction workers and doses for workers involved in excavation of contaminated soil under the clean up alternative are only small percentages of applicable guidelines. No environmental impacts are associated with either the no-action or minimal action alternatives. The impact associated with the cleanup alternative is small, especially considering that the area already has been affected by the original TA-10 decommissioning action, but nevertheless, the preferred alternative is the minimal action alternative, where 0.6 hectare of land is restricted to surface activities. This leaves the rest of the canyon available for development with up to 400 homes. The restricted area can be used for a park, tennis courts, etc., and the /sup 90/Sr activity will decay to levels permitting unrestricted usage in about 160 y.

Ferenbaugh, R.W.; Buhl, T.E.; Stoker, A.K.; Hansen, W.R.

1982-05-01T23:59:59.000Z

187

LaTeX Original - CECM  

E-Print Network (OSTI)

Oblique Representation of GEM. We begin by defining a matrix S[Reject] . which is the diagonal of the combined weight matrix for data sources i and k :.

188

Advances in CdTe R&D at NREL  

DOE Green Energy (OSTI)

This paper summarizes the following R&D accomplishments at National Renewable Energy Laboratory (NREL): (1) Developed several novel materials and world-record high-efficiency CdTe solar cell, (2) Developed "one heat-up step" manufacturing processes, and (3) Demonstrated 13.9% transparent CdTe cell and 15.3% CdTe/CIS polycrystalline tandem solar cell. Cadmium telluride has been well recognized as a promising photovoltaic material for thin-film solar cells because of its near-optimum bandgap of ~1.5 eV and its high absorption coefficient. Impressive results have been achieved in the past few years for polycrystalline CdTe thin-film solar cells at NREL. In this paper, we summarize some recent R&D activities at NREL.

Wu, X.; Zhou, J.; Keane, J. C.; Dhere, R. G.; Albin, D. S.; Gessert, T. A.; DeHart, C.; Duda, A.; Ward, J. J.; Yan, Y.; Teeter, G.; Levi, D. H.; Asher, S.; Perkins, C.; Moutinho, H. R.; To, B.

2005-11-01T23:59:59.000Z

189

Extreme solid state refrigeration using nanostructured Bi-Te alloys.  

SciTech Connect

Materials are desperately needed for cryogenic solid state refrigeration. We have investigated nanostructured Bi-Te alloys for their potential use in Ettingshausen refrigeration to liquid nitrogen temperatures. These alloys form alternating layers of Bi{sub 2} and Bi{sub 2}Te{sub 3} blocks in equilibrium. The composition Bi{sub 4}Te{sub 3} was identified as having the greatest potential for having a high Ettingshausen figure of merit. Both single crystal and polycrystalline forms of this material were synthesized. After evaluating the Ettingshausen figure of merit for a large, high quality polycrystal, we simulated the limits of practical refrigeration in this material from 200 to 77 K using a simple device model. The band structure was also computed and compared to experiments. We discuss the crystal growth, transport physics, and practical refrigeration potential of Bi-Te alloys.

Lima Sharma, Ana L. (San Jose State University, San Jose, CA); Spataru, Dan Catalin; Medlin, Douglas L.; Sharma, Peter Anand; Morales, Alfredo Martin

2009-09-01T23:59:59.000Z

190

Synthesis and characterization of ZnTe hierarchical nanostructures  

Science Conference Proceedings (OSTI)

Single-crystalline ZnTe hierarchical nanostructures have been successfully synthesized by a simple thermal evaporation technology. The as-prepared products were characterized with X-ray diffraction (XRD), scanning electron microcopy (SEM), transmission ...

Baohua Zhang; Fuqiang Guo; Wei Wang

2012-01-01T23:59:59.000Z

191

Supply Chain Dynamics of Tellurium (Te), Indium (In), and Gallium...  

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

CdTe Solar Cells, Solar Energy Materials and Solar Cells, 90 (2006) 2263-2271. 3 CRC Handbook of Chemistry and Physics, CRC Press, Boca Raton, FL, 1986. 4 M.A. Green, K....

192

VUV Detector Calibrations - CsTe Photodiode Description  

Science Conference Proceedings (OSTI)

... telluride (CsTe) photodetectors with magnesium fluoride (MgF 2 ) windows are issued by ... telluride film is deposited onto a MgF 2 window and then ...

2011-12-30T23:59:59.000Z

193

Strategies for recycling CdTe photovoltaic modules  

DOE Green Energy (OSTI)

Recycling end-of-life cadmium telluride (CdTe) photovoltaic (PV) modules may enhance the competitive advantage of CdTe PV in the marketplace, but the experiences of industries with comparable Environmental, Health and Safety (EH&S) challenges suggest that collection and recycling costs can impose significant economic burdens. Customer cooperation and pending changes to US Federal law may improve recycling economics.

Eberspacher, C.; Gay, C.F. [UNISUN, Newbury Park, CA. (United States); Moskowitz, P.D. [Brookhaven National Lab., Upton, NY (United States)

1994-12-31T23:59:59.000Z

194

Effect of Heating, Ion-Beam Milling, and ZnTe:Cu Deposition on the Spectroscopic Cathodoluminescence of Polycrystalline CdTe: Preprint  

DOE Green Energy (OSTI)

Presented at the 2001 NCPV Program Review Meeting: Cathodoluminescence used to study evolution of electro-optical properties of back surface of CdS/CdTe during initial steps of fabricating NREL ZnTe:Cu contact.

Gessert, T. A.; Romero, M. J.; Asher, S. E.

2001-10-01T23:59:59.000Z

195

Phonon conduction in PbSe, PbTe, and PbTe1?xSex from first-principles calculations  

E-Print Network (OSTI)

We apply first-principles calculations to lead selenide (PbSe) and lead telluride (PbTe) and their alloys (PbTe[subscript 1?x]Se[subscript x]), which are potentially good thermoelectric materials, to investigate their ...

Tian, Zhiting

196

A simple and efficient method for synthesizing te nanowires from CdTe nanoparticles with EDTA as shape controller under hydrothermal condition  

Science Conference Proceedings (OSTI)

We developed a simple and efficient method for synthesizing Te nanowires from CdTe nanoparticles with ethylenediaminetetraacetic acid disodium salt dehydrate (EDTA) as shape controller under hydrothermal condition. The systemcould both complete the transformation ...

Fangfang Xue; Ning Bi; Jiangong Liang; Heyou Han

2012-01-01T23:59:59.000Z

197

COMPETITIVE SOURCING  

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

COMPETITIVE SOURCING COMPETITIVE SOURCING EXECUTIVE STEERING GROUP MEETING PROCEEDINGS June 17, 2002 8:30 am - 11:00 am Room 5E-069 ATTENDEES John Gordon Robert Card Bruce Carnes Kathy Peery Brendan Danaher, AFGE Tony Lane Karen Evans Bill Sylvester Claudia Cross Brian Costlow Laurie Smith Helen Sherman Frank Bessera Rosalie Jordan Dennis O'Brien Mark Hively Robin Mudd Steven Apicella AGENDA 8:30 a.m. - 8:35 a.m. Opening Remarks 8:35a.m. - 8:55 a.m. Executive Steering Group roles and responsibilities, A-76 status, and talking points Team Briefings 8:55 a.m. - 9:20 a.m. Information Technology Study 9:20 a.m. - 9:45 a.m. Financial Services Study

198

ION SOURCE  

DOE Patents (OSTI)

An ion source is described and comprises an arc discharge parallel to the direction of and inside of a magnetic field. an accelerating electrode surrounding substantially all of the discharge except for ion exit apertures, and means for establishing an electric field between that electrode and the arc discharge. the electric field being oriented at an acute angle to the magnetic field. Ions are drawn through the exit apertures in the accelrating electrcde in a direction substantially divergent to the direction of the magnetic field and so will travel in a spiral orbit along the magnetic field such that the ions will not strike the source at any point in their orbit within the magnetic field.

Blue, C.W.; Luce, J.S.

1960-07-19T23:59:59.000Z

199

High pressure transport characteristics of Bi[subscript 2]Te[subscript 3], Sb[subscript 2]Te[subscript 3], and BiSbTe[subscript 3  

Science Conference Proceedings (OSTI)

This paper presents ambient and high pressure measurements of transport properties of the Bi2Te3-Sb2Te3 series of materials. The electrical resistivity, thermal conductivity, and Seebeck coefficient have been measured on both end compounds and the direct solid solution of the two at pressure up to 10 GPa. An additional discussion involving the high pressure structure will be presented. From this, it was determined that these materials undergo at least two structural phase transitions between 0 and 20 GPa and a discussion is presented regarding this and the changes in the transport properties.

Jacobsen, M.K.; Sinogeikin, S.V.; Kumar, R.S.; Cornelius, A.L. (UNLV); (CIW)

2012-07-25T23:59:59.000Z

200

Effects of Cu Diffusion from ZnTe:Cu/Ti Contacts on Carrier Lifetime of CdS/CdTe Thin Film Solar Cells: Preprint  

DOE Green Energy (OSTI)

We study the performance of CdS/CdTe thin film PV devices processed with a ZnTe:Cu/Ti contact to investigate how carrier lifetime in the CdTe layer is affected by Cu diffusion from the contact.

Gessert, T. A.; Metzger, W. K.; Asher, S. E.; Young, M. R.; Johnston, S.; Dhere, R. G.; Duda, A.

2008-05-01T23:59:59.000Z

Note: This page contains sample records for the topic "ta te source" 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.


201

LaTeX Original - CECM  

E-Print Network (OSTI)

We can now define the transformed (personal) stimulus space for the combined data sources 1 and k as the ( n+m by tik ) matrix of coordinates of the principal ...

202

3AK RIDGE NATIONAL LABORATORY OPERAiEO BY MARTIN MARIE,TA ENERGY SYSTEMS, INC.  

Office of Legacy Management (LM)

.I Y. ,J,.- i .I Y. ,J,.- i - 3AK RIDGE NATIONAL LABORATORY OPERAiEO BY MARTIN MARIE,TA ENERGY SYSTEMS, INC. POST OFFICE BOX X OAK RIOGE. TENNESSEE 37631 July 20, 1984 Ms. Gale P. Turi Division of Remedial Action Projects Office of Nuclear Energy U.S. Department of Energy MS - NE24 Washington, D.C. 20545 Dear Ms. Turi: Radfoloafcal Survey of the Guterl Steel Fad1 ftya 1 o&a As requested, a visit was made to the Guterl Steel facility (formerly Simonds Saw and Steel) on July 9, 1984 to determine if there have been significant changes in the radiological status of the facility since the last survey. In general, measurements made during this survey are con- sistent with those made during the 1977 survey (ORNL) and a follow-up survey in 1981 (FBD). Significant amounts of contaminated material are present in the rolling

203

An overview of the TA-55, Building PF-4 ventilation system  

Science Conference Proceedings (OSTI)

An overview of the TA-55, Building PF-4 ventilation system is provided in the following sections. Included are descriptions of the zone configurations, equipment-performance criteria, ventilation support systems, and the ventilation-system evaluation criteria. Section 4.2.1.1 provides a brief discussion of the ventilation system function. Section 4.2.1.2 provides details on the overall system configuration. Details of system interfaces and support systems are provided in Section 4.2.1.3. Section 4.2.1.4 describes instrumentation and control needed to operate the ventilation system. Finally, Sections 4.2.1.5 and 4.2.1.6 describe system surveillance/maintenance and Technical Safety Requirements (TSR) Limitations, respectively. Note that the numerical parameters included in this description are considered nominal; set points and other specifications actually fall within operational bands.

NONE

1994-02-22T23:59:59.000Z

204

Radionuclide contaminant analysis of small mammals at Area G, TA-54, 1994  

Science Conference Proceedings (OSTI)

Small mammals were sampled at two waste burial sites (1 and 2) at Area G, TA-54 and a control site outside Area G (Site 3) to identify radionuclides that are present within surface and subsurface soils at waste burial sites, to compare the amount of radionuclide uptake by small mammals at waste burial sites to a control site, and to identify the primary mode of contamination to small mammals, either through surface contact or ingestion/inhalation. Three composite samples of at least five animals per sample were collected at each site. Pelts and carcasses of each animal were separated and analyzed independently. Samples were analyzed for {sup 241}Am, {sup 90}Sr, {sup 238}Pu, {sup 239}Pu, total U, and gamma spectroscopy (including {sup 137}Cs). Significantly higher (parametric t-test at p = 0.05) levels of total U, {sup 241}Am, {sup 238}Pu, {sup 239}Pu, and {sup 40}K were detected in pelts as compared to the carcasses of small mammals at TA-54. Concentrations of other measured radionuclides in carcasses were nearly equal to or exceeded the mean concentrations in the pelts. The authors results show higher concentrations in pelts compared to carcasses which is similar to what has been found at waste burial/contaminated sites outside of Los Alamos National Laboratory. Site 1 had significantly higher (alpha = 0.05, F = 0.0095) total U concentrations in carcasses than Sites 2 and 3. Site 2 had significantly higher (alpha = 0.05, F = 0.0195) {sup 239}Pu concentrations in carcasses than either Site 1 or Site 3. A significant difference in {sup 90}Sr concentration existed between Sites 1 and 2 (alpha = 0.05, F = 0.0681) and concentrations of {sup 40}K at Site 1 were significantly different from Site 3.

Biggs, J.; Bennett, K.; Fresquez, P.

1995-09-01T23:59:59.000Z

205

Electrical Characterization of Cu Composition Effects in CdS/CdTe Thin-Film Solar Cells with a ZnTe:Cu Back Contact: Preprint  

DOE Green Energy (OSTI)

We study the effects of Cu composition on the CdTe/ZnTe:Cu back contact and the bulk CdTe. For the back contact, its potential barrier decreases with Cu concentration while its saturation current density increases. For the bulk CdTe, the hole density increases with Cu concentration. We identify a Cu-related deep level at {approx}0.55 eV whose concentration is significant when the Cu concentration is high. The device performance, which initially increases with Cu concentration then decreases, reflects the interplay between the positive influences and negative influences (increasing deep levels in CdTe) of Cu.

Li, J. V.; Duenow, J. N.; Kuciauskas, D.; Kanevce, A.; Dhere, R. G.; Young, M. R.; Levi, D. H.

2012-07-01T23:59:59.000Z

206

COMPETITIVE SOURCING  

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

EXECUTIVE STEERING GROUP Meeting Proceedings October 30, 2002 Room 6E-069, 10:30 - 12:00 Agenda Opening Remarks Bruce Carnes Competitive Sourcing Update Denny O'Brien Team Briefings Team Leads ESG Discussion/Wrap up Bruce Carnes Attendees Bruce Carnes, Acting Chair MaryAnn Shebek Robert Card Prentis Cook Ambassador Brooks Tony Lane Kyle McSlarrow Karen Evans Suzanne Brennan, NTEU Claudia Cross Brian Costlow Helen Sherman Frank Bessera Laurie Morman Denny O'Brien Travis McCrory Bill Pearce Jeff Dowl Mark Hively Steven Apicella Robin Mudd Bruce Carnes chaired the meeting and began with welcoming NTEU to the meeting. In regard to the OMB's Balanced Scorecard, the Department has achieved a Green on progress and we are close to achieving a yellow on status.

207

Innovative sputtering techniques for CIS and CdTe submodule fabrication  

DOE Green Energy (OSTI)

This report describes work done during Phase 1 of the subject subcontract. The subcontract was designed to study innovative deposition techniques, such as the rotating cylindrical magnetron sputtering system and electrodeposition for large-area, low-cost copper indium diselenide (CIS) and cadmium telluride (CdTe) devices. A key issue for photovoltaics (PV) in terrestrial and future space applications is producibility, particularly for applications using a large quantity of PV. Among the concerns for fabrication of polycrystalline thin-film PV, such as CIS and CdTe, are production volume, cost, and minimization of waste. Both rotating cylindrical magnetron (C-Mag[trademark]) sputtering and electrodeposition have tremendous potential for the fabrication of polycrystalline thin-film PV due to scaleability, efficient utilization of source materials, and inherently higher deposition rates. In the case of sputtering, the unique geometry of the C-Mae facilitates innovative cosputtering and reactive sputtering that could lead to greater throughput reduced health and safety risks, and, ultimately, lower fabrication cost. Electrodeposited films appear to be adherent and comparable with low-cost fabrication techniques. Phase I involved the initial film and device fabrication using the two techniques mentioned herein. Devices were tested by both internal facilities, as well as NREL and ISET.

Armstrong, J.M.; Misra, M.S.; Lanning, B. (Martin Marietta Aerospace, Denver, CO (United States). Astronautics Group)

1993-03-01T23:59:59.000Z

208

Cosmic ray knee and new physics at the TeV scale  

E-Print Network (OSTI)

We analyze the possibility that the cosmic ray knee appears at an energy threshold where the proton-dark matter cross section becomes large due to new TeV physics. It has been shown that such interactions could break the proton and produce a diffuse gamma ray flux consistent with MILAGRO observations. We argue that this hypothesis implies knees that scale with the atomic mass for the different nuclei, as KASKADE data seem to indicate. We find that to explain the change in the spectral index in the flux from E^{-2.7} to E^{-3.1} the cross section must grow like E^{0.4+\\beta} above the knee, where \\beta=0.3-0.6 parametrizes the energy dependence of the age (\\tau \\propto E^{-\\beta}) of the cosmic rays reaching the Earth. The hypothesis also requires mbarn cross sections (that could be modelled with TeV gravity) and large densities of dark matter (that could be clumped around the sources of cosmic rays). We argue that neutrinos would also exhibit a threshold at E=(m_\\chi/m_p)E_{knee}\\approx 10^8 GeV where their interaction with a nucleon becomes strong. Therefore, the observation at ICECUBE or ANITA of standard neutrino events above this threshold would disprove the scenario.

Roberto Barcelo; Manuel Masip; Iacopo Mastromatteo

2009-03-30T23:59:59.000Z

209

A 3 TeV Muon Collider Lattice Design  

SciTech Connect

A new lattice for 3 TeV c.o.m. energy with {beta}* = 5mm was developed which follows the basic concept of the earlier 1.5 TeV design but uses quad triplets for the final focus in order to keep the maximum magnet strength and aperture close to those in 1.5 TeV case. Another difference is employment of combined-function magnets with the goal to lower heat deposition in magnet cold mass and to eliminate bending field free regions which produce 'hot spots' of neutrino radiation that can be an issue at higher energy. The proposed lattice is shown to satisfy the requirements on luminosity, dynamic aperture and momentum acceptance.

Alexahin, Y.; Gianfelice-Wendt, E.; /Fermilab

2012-05-01T23:59:59.000Z

210

Radiation source  

DOE Patents (OSTI)

A device and method for relativistic electron beam heating of a high-density plasma in a small localized region. A relativistic electron beam generator or accelerator produces a high-voltage electron beam which propagates along a vacuum drift tube and is modulated to initiate electron bunching within the beam. The beam is then directed through a low-density gas chamber which provides isolation between the vacuum modulator and the relativistic electron beam target. The relativistic beam is then applied to a high-density target plasma which typically comprises DT, DD, or similar thermonuclear gas at a density of 10.sup.17 to 10.sup.20 electrons per cubic centimeter. The target gas is ionized prior to application of the relativistic electron beam by means of a laser or other preionization source to form a plasma. Utilizing a relativistic electron beam with an individual particle energy exceeding 3 MeV, classical scattering by relativistic electrons passing through isolation foils is negligible. As a result, relativistic streaming instabilities are initiated within the high-density target plasma causing the relativistic electron beam to efficiently deposit its energy into a small localized region of the high-density plasma target.

Thode, Lester E. (Los Alamos, NM)

1981-01-01T23:59:59.000Z

211

High contrast, CdTe portal scanner for radiation therapy  

Science Conference Proceedings (OSTI)

This paper reports on one of the most promising new technologies for improving the qualify of radiation therapy, the use of real-time systems to produce portal images. In the authors' approach, they are constructing a linear array of 256 CdTe photovoltaic detectors attached to a very compact linear scanner, all of which will be mounted in a cassette shaped package to be located under the patient table. The high stopping power of the CdTe allows a high contrast image to be made using only a single Linac pulse per line, resulting in a high contrast image in under 5 seconds.

Entine, G.; Squillante, M.R.; Hahn, R.; Cirignano, L.J.; McGann, W. (Radiation Monitoring Devices, Inc., Watertown, MA (United States)); Biggs, P.J. (Massachusetts General Hospital, Boston, MA (United States))

1992-10-01T23:59:59.000Z

212

Feasibility of GRB with TeV gamma ray all sky monitor  

E-Print Network (OSTI)

We discuss feasibility of Gamma ray burst (GRB) with TeV gamma ray all sky monitor and discuss necessity of TeV gamma ray cherenkov all sky monitor.

S. Osone

2003-05-14T23:59:59.000Z

213

V-183: Cisco TelePresence TC and TE Bugs Let Remote Users Deny...  

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

3: Cisco TelePresence TC and TE Bugs Let Remote Users Deny Service and Remote Adjacent Authenticated Users Gain Root Shell Access V-183: Cisco TelePresence TC and TE Bugs Let...

214

Electrophysical properties of semimagnetic solid solutions Hg 1?x Mn x Te  

Science Conference Proceedings (OSTI)

A comprehensive study of the electrophysical properties of the semimagnetic ternary solid solution Hg 1?x Mn x Te an alternative material to Hg 1?x Cd x Te is reported. The charge-carrier scattering

I. M. Nesmelova; V. N. Ryzhkov; M. I. Ibragimova; V. Yu. PetukhovKazan Physicotechnical Institute, Kazan Research Center of the Russian Academy of Sciences, Kazan?420029, Russia

2004-01-01T23:59:59.000Z

215

Micro-PL Studies of Polycrustalline CdS/CdTe Interfaces  

DOE Green Energy (OSTI)

We describe a technique of photoluminescence measurements with a resolutiion of microns. This technique is applied to examine the CdS/CdTe interface of CdTe solar cells.

Dhere, R.; Cheong, M.; Smith, S.; Albin, D.; Mascarenhas, A.; Gessert, T. A.

2000-01-01T23:59:59.000Z

216

Junction Evolution During Fabrication of CdS/CdTe Thin-film PV Solar Cells (Presentation)  

DOE Green Energy (OSTI)

Discussion of the formation of CdTe thin-film PV junctions and optimization of CdTe thin-film PV solar cells.

Gessert, T. A.

2010-09-01T23:59:59.000Z

217

Photohadronic Origin of the TeV-PeV Neutrinos Observed in IceCube  

E-Print Network (OSTI)

We perform an unbiased search of the origin of the recently observed 28 events above ~30 TeV in the IceCube neutrino observatory, assuming that these are (apart from the atmospheric background) of astrophysical origin produced by photohadronic interactions. Instead of relying on the normalization of the neutrino flux, we demonstrate that spectral shape and flavor composition can be used to constrain or identify the source class. In order to quantify our observations, we use a model where the target photons are produced by the synchrotron emission of co-accelerated electrons, and we include magnetic field effects on the secondary muons, pions, and kaons. We find that the lack of observed events with energies much larger than PeV points towards sources with strong magnetic fields, which do not exhibit a direct correlation between highest cosmic ray and neutrino energies. While the simplest AGN models with efficient proton acceleration plausibly describe the current data at about the 3sigma confidence level, we show that IceCube can rule out that the observed neutrinos stem from the sources of the ultra-high energy cosmic rays with a factor of ten increased statistics at more than 5sigma if the current observations are confirmed. A possible caveat are sources with strong magnetic fields and high Lorentz factors, such as magnetic energy dominated GRBs.

Walter Winter

2013-07-10T23:59:59.000Z

218

Formation of ZnTe:Cu/Ti Contacts at High Temperature for CdS/CdTe Devices (Presentation)  

DOE Green Energy (OSTI)

The conclusions of this report are that Cu diffusion from a ZnTe:Cu contact causes good and bad things. The good (Cu in CdS < low 10{sup 18} cm{sup -3})--increase in CdTe N{sub A}-N{sub D} that leads to V{sub oc} and FF improvement. The bad (Cu in CdS > low 10{sup 18} cm{sup -3})--(1) possibly decreased of shunt resistance (?); (2) depletion width in CdTe can become too narrow for optimum current collection at J{sub MPP}; (3) donor reduction in CdS (significant FF loss in LIV); and (4) excessive Cu diffusion into CdS readily observed by red-light bias QE.

Gessert, T. A.; Asher, S.; Johnston, S.; Duda, A.; Young, M. R.; Moriarty, T.

2006-05-01T23:59:59.000Z

219

JUN TION SOLAR ELLS TE HNOLOGY READINESS LEVEL: 5 US PATENT ...  

POTENTIAL APPLI ATIONS TE HNOLOGI AL Generation of electricity for space photovoltaic applications Terrestrial high-concentration photovoltaic applications

220

TOP AT™ FOR THE ALIGNMENT & ON ENTRATION OF SOLAR TROUGHS TE ...  

POTENTIAL APPLI ATIONS Clean energy production Electric Utility Alternative energy options TE HNOLOGI AL ENEFITS Simple & easy to implement

Note: This page contains sample records for the topic "ta te source" 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

Appendix B: CArBon dioxide CApture teChnology SheetS  

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

DioxiDe CaPture teChnology sheets national energy teChnology laboratory aDvanCeD aCiD gas seParation teChnology for the utilization of low-rank Coals primary project goals Air...

222

NEPA REVIE\ry LASO-10-001 CATEGORICAL EXCLUSION FUELS RESEARCH LAB AT TA-35.455  

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

REVIE\ry REVIE\ry LASO-10-001 CATEGORICAL EXCLUSION FUELS RESEARCH LAB AT TA-35.455 I. DESCRIPTION OF PROPOSED ACTION: Los Alamos National Laboratory proposes to modify an existing laboratory for a Fuels Research Lab (455-FRL). The laboratory would be used to fabricate and characterize fuel pellets. The proposed activities would take place at the former location of the Polymers & Coating Lab (PCL) located at TA-35, Building 455, in room 104. Authorization would need to be obtained for the processing of radioactive materials in this location. The current laboratory configuration of chilled water supply and return, gas, compressed air, and vacuum supply, electrical supply, HEPA filtration, and ventilation would be assessed and modified to suit 455- TPCL facility needs. Analytical and process equipment would be required for this facility. Glovebox

223

CERTIFICATION DOCKET FOR THE F0RhqE.R SITE OF THE RADIOACTIVE LIQUID WASTE TREATMENT PLANT (TA-45)  

Office of Legacy Management (LM)

CERTIFICATION DOCKET CERTIFICATION DOCKET FOR THE F0RhqE.R SITE OF THE RADIOACTIVE LIQUID WASTE TREATMENT PLANT (TA-45) AND THE EFFLUENT RECEIVING AREAS OF ACID, PUEBLO, AND LOS ALAMOS CANYOM, LOS ALAMOS, NEW MEXICO DEPARTMENT OF ENERGY Office of Nuclear Energy Office of Terminal Waste Disposal and Remedial Action Division of Remedial Action Projects -. CONTENTS A Page - Introduction to the Certification Docket for the Former Site of the Radioactive Liquid Waste Treatment Plant (TA-45) and the Effluent Receiving Areas of Acid, Pueblo, and Los Alamos Canyons, Los Alamos, New Mexico Description of the Formeriy Utilized Sites Program at the Former Site of the T.4-45 Treatment Plant and Acid, Pueblo, and Los Alamos Canyons Purpose Property Identification Docket Contents

224

School of Mathematical and Computing Sciences Te Kura Pangarau, Rorohiko  

E-Print Network (OSTI)

#12;School of Mathematical and Computing Sciences Te Kura Pangarau, Rorohiko Vortex geometry constant throughout the fluid flow. The velocity of the fluid flow is v = (A ^r + B ^) r . Use constant throughout the fluid flow. The velocity of the fluid flow is v = (A ^r + B ^) r . Streamlines are equiangular

Visser, Matt

225

TeV Dark Matter detection by Atmospheric Cerenkov Telescopes  

E-Print Network (OSTI)

Ground based Atmospheric Cerenkov Telescopes have recently unveiled a TeV gamma-ray signal from the direction of the Galactic Centre. We examine whether these gamma-rays, observed by the VERITAS, CANGAROO-II and HESS collaborations, may arise from annihilations of dark matter particles. Emission from nearby dwarf spheroidals, such as Sagittarius, could provide a test of this scenario.

Francesc Ferrer

2005-05-19T23:59:59.000Z

226

Carrier dynamics and activation energy of CdTe quantum dots in a Cd{sub x}Zn{sub 1-x}Te quantum well  

SciTech Connect

We investigate the optical properties of CdTe quantum dots (QDs) in a Cd{sub 0.3}Zn{sub 0.7}Te quantum well (QW) grown on GaAs (100) substrates. Carrier dynamics of CdTe/ZnTe QDs and quantum dots-in-a-well (DWELL) structure is studied using time-resolved photoluminescence (PL) measurements, which show the longer exciton lifetime of the DWELL structure. The activation energy of the electrons confined in the DWELL structure, as obtained from the temperature-dependent PL spectra, was also higher than that of electrons confined in the CdTe/ZnTe QDs. This behavior is attributed to the better capture of carriers into QDs within the surrounding QW.

Han, W. I.; Lee, J. H.; Yu, J. S.; Choi, J. C. [Department of Physics, Yonsei University, Wonju 220-710 (Korea, Republic of); Lee, H. S. [Advanced Photonics Research Institute, Gwangju Institute of Science and Technology, Gwangju 500-712 (Korea, Republic of)

2011-12-05T23:59:59.000Z

227

Study of galactic gamma ray sources with Milagro Jordan A. Goodman for the Milagro Collaboration  

E-Print Network (OSTI)

Study of galactic gamma ray sources with Milagro Jordan A. Goodman for the Milagro Collaboration. This factor of ~2 increase in sensitivity (as shown in figure 1) has dramatically changed our view of the high-energy Galactic gamma-ray emission at TeV energies, including the detection of the Cygnus Region at high

California at Santa Cruz, University of

228

Floodplain Assessment for the Proposed Outdoor Fire Range Upgrades at TA-72 in Lower Sandia Canyon, Los Alamos National Laboratory  

Science Conference Proceedings (OSTI)

Los Alamos National Laboratory (LANL) is preparing to implement actions in Sandia Canyon at Technical Area (TA) 72. Los Alamos National Security (LANS) biologists conducted a floodplain determination and this project is partially located within a 100-year floodplain. The proposed project is to upgrade the existing outdoor shooting range facilities at TA-72. These upgrades will result in increased safety and efficiencies in the training for Protective Force personnel. In order to remain current on training requirements, the firing ranges at TA-72 will be upgraded which will result in increased safety and efficiencies in the training for Protective Force personnel (Figure 1). These upgrades will allow for an increase in class size and more people to be qualified at the ranges. Some of these upgrades will be built within the 100-year floodplain. The upgrades include: concrete pads for turning target systems and shooting positions, new lighting to illuminate the firing range for night fire, a new speaker system for range operations, canopies at two locations, an impact berm at the far end of the 300-yard mark, and a block wall for road protection.

Hathcock, Charles D. [Los Alamos National Laboratory

2012-08-27T23:59:59.000Z

229

A Note on TeV Cerenkov Events as Bose-Einstein Gamma Condensations  

E-Print Network (OSTI)

The idea that the TeV air showers, thought to be produced by >10 TeV gamma rays from Mrk 501, can be mimicked by coherent bunches of sub-TeV photons is reexamined, focusing on fundamental considerations. In particular, it is shown that the minimum spot size of the beam of pulsed TeV photons arriving at Earth is on the order of a few kilometers, unless a lens with certain characteristics is placed between the TeV laser and Earth. The viability of the laser production mechanism proposed by Harwit et al. (2000) is also reassessed.

Amir Levinson

2000-07-09T23:59:59.000Z

230

Novel ways of depositing ZnTe films by a solution growth technique  

DOE Green Energy (OSTI)

An electrochemical process has been successfully developed for the reproducible deposition of ZnTe and copper-doped ZnTe films suitable as transparent ohmic contacts for CdS/CdTe solar cells. The development of this method and optimization of key processing steps in the fabrication of CdS/CdTe/ZnTe:Cu devices has allowed IEC to achieve cell performance results of FF>70% and {eta} {approximately}10%. Preliminary efforts have indicated that the deposition methods investigated are potentially feasible for the formation of other II-VI compounds for use in polycrystalline thin film solar devices and should be the focus of future work.

Birkmire, R.W.; McCandless, B.E.; Yokimcus, T.A.; Mondal, A. (Delaware Univ., Newark, DE (United States). Inst. of Energy Conversion)

1992-10-01T23:59:59.000Z

231

Comparison of CdTe and CdZnTe Detectors for Field Determination of Uranium Isotopic Enrichments  

DOE Green Energy (OSTI)

A performance comparison of a CdTe and a CdZnTe detector when exposed to uranium samples of various isotopic enrichments has been performed. These high-resolution detectors can assist in the rapid determination of uranium isotopic content of illicit material. Spectra were recorded from these room temperature semiconductor detectors with a portable multi-channel analyzer, both in the laboratory and in a field environment. Both detectors were operated below ambient temperature using the vendor supplied thermoelectric coolers. Both detectors had nominally the same active volume (18 mm3 for the CdZnTe and 25 mm3 for the CdTe detector) and resolution. Spectra of samples of known isotopic content were recorded at fixed geometries. An evaluation of potential signature g rays for the detection of enriched uranium was completed. Operational advantages and disadvantages of each detector are discussed. There is a need to improve the detection sensitivity during the interdiction of special nuclear materials (SNM) for increased homeland protection. It is essential to provide additional tools to first responders and law enforcement personnel for assessing nuclear and radiological threats.

Hofstetter, KJ

2004-01-23T23:59:59.000Z

232

Contributions to 2^nd TeV Particle Astrophysics Conference (TeV PA II) Madison Wisconsin - 28-31 August 2006  

E-Print Network (OSTI)

This collection of proceedings to the TeV PA II Conference presents some of the latest results of the IceCube Collaboration.

IceCube Collaboration; A. Achterberg

2006-11-18T23:59:59.000Z

233

A very promising piezoelectric property of Ta{sub 2}O{sub 5} thin films. II: Birefringence and piezoelectricity  

SciTech Connect

Birefringent and piezoelectric properties of Ta{sub 2}O{sub 5} ceramic thin films of monoclinic and trigonal structures were analyzed. The birefringence, observed by reflected polarized light microscopy, yields information on thin film microstructures, crystal shapes and sizes and on crystallographic orientations of grains of trigonal structure. Such an information was considered for investigating piezoelectric properties by laser Doppler vibrometry and by piezoresponse force microscopy. The vibration velocity was measured by applying an oscillating electric field between electrodes on both sides of a Ta{sub 2}O{sub 5} film deposited on a Si substrate which was pasted on an isolating mica sheet. In this case, it is shown that the vibration velocity results were not only from a converse piezoelectric effect, proportional to the voltage, but also from the Coulomb force, proportional to the square of the voltage. A huge piezoelectric strain effect, up to 7.6%, is found in the case of Ta{sub 2}O{sub 5} of trigonal structure. From an estimation of the electrical field through the Ta{sub 2}O{sub 5} thin film, this strain likely corresponds to a very high longitudinal coefficient d{sub 33} of several thousand picometers. Results obtained by piezoresponse force microscopy show that trigonal grains exhibit a polarization at zero field, which is probably due to stress caused expansion in the transition monoclinic-trigonal, presented in a previous article (part I). - Graphical abstract: Image of cross-polarized optical microscopy showing grains of trigonal structure embedded in the monoclinic phase (on the left); (a) mounting of the sample for Laser Doppler Vibrometry, sample constituted of several layers and its equivalent electrical circuit; (b) longitudinal displacements due to converse piezoelectric and Coulomb effects and corresponding piezoelectric strain-U{sub app.}. hystereses. Highlights: > A new Ta{sub 2}O{sub 5} trigonal phase is shown to be birefringent and piezoelectric. > This phase is related to a reversible transition with a monoclinic phase. > The piezoelectricity of this trigonal phase is of several thousands of pm/V. > It is compared to piezoelectricity of the monoclinic phase of several tens of pm/V.

Audier, M., E-mail: Marc.Audier@grenoble-inp.fr [Laboratoire des Materiaux et du Genie Physique, UMR CNRS 5628, Minatec - INP Grenoble, 3 parvis Louis Neel, BP 257, 38016 Grenoble Cedex 1 (France); Chenevier, B.; Roussel, H. [Laboratoire des Materiaux et du Genie Physique, UMR CNRS 5628, Minatec - INP Grenoble, 3 parvis Louis Neel, BP 257, 38016 Grenoble Cedex 1 (France); Vincent, L. [CIME Nanotech Minatec, Microsystemes et capteurs, F-38016 Grenoble Cedex 1 (France); Pena, A. [Institut Neel - CNRS/UJF, Dpt. Matiere Condensee, Materiaux et Fonctions, F-38042 Grenoble (France); Lintanf Salauen, A. [L2MA, CEA LETI D2NT, F-38054 Grenoble (France)

2011-08-15T23:59:59.000Z

234

Source Selection | Department of Energy  

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

Source Selection Source Selection Source SelectionSource Selection Boards Source Evaluation Board (SEB) Monthly Status Reporting Requirement (pdf) Source Evaluation Board (SEB)...

235

Radionuclide contaminant analysis of small mammals at Area G, TA-54, Los Alamos National Laboratory, 1995  

Science Conference Proceedings (OSTI)

At Los Alamos National Laboratory, small mammals were sampled at two waste burial sites (Site 1-recently disturbed and Site 2-partially disturbed) at Area G, Technical Area 54 and a control site on Frijoles Mesa (Site 4) in 1995. Our objectives were (1) to identify radionuclides that are present within surface and subsurface soils at waste burial sites, (2) to compare the amount of radionuclide uptake by small mammals at waste burial sites to a control site, and (3) to identify if the primary mode of contamination to small mammals is by surface contact or ingestion/inhalation. Three composite samples of at least rive animals per sample were collected at each site. Pelts and carcasses of each animal were separated and analyzed independently. Samples were analyzed for {sup 241}Am, {sup 90}Sr , {sup 238}Pu, {sup 239}Pu, total U, {sup 137}Cs, and {sup 3}H. Significantly higher (parametric West at p=0.05) levels of total U, {sup 241}Am, {sup 238}Pu and {sup 239}Pu were detected in pelts than in carcasses of small mammals at TA-54. Concentrations of other measured radionuclides in carcasses were nearly equal to or exceeded the mean concentrations in the pelts. Our results show higher concentrations in pelts compared to carcasses, which is similar to what has been found at waste burial/contaminated sites outside of Los Alamos National Laboratory. Site 1 had a significantly higher (alpha=0.05, P=0.0125) mean tritium concentration in carcasses than Site 2 or Site 4. In addition Site 1 also had a significantly higher (alpha=0.05, p=0.0024) mean tritium concentration in pelts than Site 2 or Site 4. Site 2 had a significantly higher (alpha=0.05, P=0.0499) mean {sup 239}Pu concentration in carcasses than either Site 1 or Site 4.

Bennett, K.; Biggs, J.; Fresquez, P.

1997-01-01T23:59:59.000Z

236

Enhancement of the steady state minority carrier lifetime in HgCdTe photodiode using ECR plasma hydrogenation  

Science Conference Proceedings (OSTI)

Keywords: HgCdTe, diffusion length, field effect transistor, hydrogenation, lifetime, mobility, photodiode

Han Jung; Hee Chul Lee; Choong-Ki Kim

1996-08-01T23:59:59.000Z

237

THE COSMOLOGICAL IMPACT OF LUMINOUS TeV BLAZARS. II. REWRITING THE THERMAL HISTORY OF THE INTERGALACTIC MEDIUM  

Science Conference Proceedings (OSTI)

The universe is opaque to extragalactic very high energy gamma rays (VHEGRs, E > 100 GeV) because they annihilate and pair produce on the extragalactic background light. The resulting ultrarelativistic pairs are commonly assumed to lose energy primarily through inverse Compton scattering of cosmic microwave background (CMB) photons, reprocessing the original emission from TeV to GeV energies. In Broderick et al., we argued that this is not the case; powerful plasma instabilities driven by the highly anisotropic nature of the ultrarelativistic pair distribution provide a plausible way to dissipate the kinetic energy of the TeV-generated pairs locally, heating the intergalactic medium (IGM). Here, we explore the effect of this heating on the thermal history of the IGM. We collate the observed extragalactic VHEGR sources to determine a local VHEGR heating rate. Given the pointed nature of VHEGR observations, we estimate the correction for the various selection effects using Fermi observations of high- and intermediate-peaked BL Lac objects. As the extragalactic component of the local VHEGR flux is dominated by TeV blazars, we then estimate the evolution of the TeV blazar luminosity density by tying it to the well-observed quasar luminosity density and producing a VHEGR heating rate as a function of redshift. This heating is relatively homogeneous for z {approx}history of the IGM. Due to the homogeneous nature of the extragalactic background light, TeV blazars produce a uniform volumetric heating rate. This heating is sufficient to increase the temperature of the mean density IGM by nearly an order of magnitude, and at low densities by substantially more. It also naturally produces the inverted temperature-density relation inferred by recent observations of the high-redshift Ly{alpha} forest, a feature that is difficult to reconcile with standard reionization models. Finally, we close with a discussion on the possibility of detecting this hot low-density IGM suggested by our model either directly or indirectly via the local Ly{alpha} forest, the Comptonized CMB, or free-free emission, but we find that such measurements are currently not feasible.

Chang, Philip; Broderick, Avery E.; Pfrommer, Christoph, E-mail: aeb@cita.utoronto.ca, E-mail: pchang@cita.utoronto.ca, E-mail: christoph.pfrommer@h-its.org [Canadian Institute for Theoretical Astrophysics, 60 St. George Street, Toronto, ON M5S 3H8 (Canada)

2012-06-10T23:59:59.000Z

238

Hadron production and QGP Hadronization in Pb--Pb collisions at $\\sqrt{s_{NN}}=2.76$ TeV  

E-Print Network (OSTI)

We show that all central rapidity hadron yields measured in Pb--Pb collisions at $\\sqrt{s_{NN}}=2.76$ TeV are well described by the chemical non-equilibrium statistical hadronization model (SHM), where the chemically equilibrated QGP source breaks up directly into hadrons. SHM parameters are obtained as a function of centrality of colliding ions, and we compare CERN Large Hadron Collider (LHC) with Brookhaven National Laboratory Relativistic Heavy Ion Collider (RHIC) results. We predict yields of unobserved hadrons and address anti-matter production. The physical properties of the quark--gluon plasma fireball particle source show universality of hadronization conditions at LHC and RHIC.

Michal Petran; Jean Letessier; Vojtech Petracek; Johann Rafelski

2013-03-08T23:59:59.000Z

239

TeV scale dark matter and electroweak radiative corrections  

SciTech Connect

Recent anomalies in cosmic rays data, namely, from the PAMELA Collaboration, can be interpreted in terms of TeV scale decaying/annihilating dark matter. We analyze the impact of radiative corrections coming from the electroweak sector of the standard model on the spectrum of the final products at the interaction point. As an example, we consider virtual one loop corrections and real gauge bosons emission in the case of a very heavy vector boson annihilating into fermions. We find electroweak corrections that are relevant, but not as big as sometimes found in the literature; we relate this mismatch to the issue of gauge invariance. At scales much higher than the symmetry breaking scale, one loop electroweak effects are so big that eventually higher orders/resummations have to be considered: we advocate for the inclusion of these effects in parton shower Monte Carlo models aiming at the description of TeV scale physics.

Ciafaloni, Paolo; Urbano, Alfredo [INFN - Sezione di Lecce and Universita del Salento, Via per Arnesano, I-73100 Lecce (Italy)

2010-08-15T23:59:59.000Z

240

High-efficiency large-area CdTe panels  

DOE Green Energy (OSTI)

The objective of this three year effort has been to develop an improved materials technology and fabrication process for limited volume production of 1 ft{sup 2} and 4 ft{sup 2} CdS/CdTe photovoltaic modules. The module stability objective by the end of this three year subcontract was to develop techniques to provide ten year life exploration with no greater than 10% degradation. In order to achieve these efficiency and stability objectives, the research program has been separated into tasks including: (1) analysis and characterization of CdS/CdTe Devices; (2) performance optimization on small cells; (3) encapsulation and stability testing; and (4) module efficiency optimization. 27 refs., 18 figs., 3 tabs.

Albright, S.P.; Chamberlin, R.R.; Jordan, J.F. (Photon Energy, Inc., El Paso, TX (USA))

1990-11-01T23:59:59.000Z

Note: This page contains sample records for the topic "ta te source" 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

Charge transport properties of CdMnTe radiation detectors  

Science Conference Proceedings (OSTI)

Growth, fabrication and characterization of indium-doped cadmium manganese telluride (CdMnTe)radiation detectors have been described. Alpha-particle spectroscopy measurements and time resolved current transient measurements have yielded an average charge collection efficiency approaching 100 %. Spatially resolved charge collection efficiency maps have been produced for a range of detector bias voltages. Inhomogeneities in the charge transport of the CdMnTe crystals have been associated with chains of tellurium inclusions within the detector bulk. Further, it has been shown that the role of tellurium inclusions in degrading chargecollection is reduced with increasing values of bias voltage. The electron transit time was determined from time of flight measurements. From the dependence of drift velocity on applied electric field the electron mobility was found to be n = (718 55) cm2/Vs at room temperature.

Kim K.; Rafiel, R.; Boardman, M.; Reinhard, I.; Sarbutt, A.; Watt, G.; Watt, C.; Uxa, S.; Prokopovich, D.A.; Belas, E.; Bolotnikov, A.E.; James, R.B.

2012-04-11T23:59:59.000Z

242

Sub-barrier fusion enhancement with radioactive 134Te  

E-Print Network (OSTI)

The fusion cross sections of radioactive $^{134}$Te + $^{40}$Ca were measured at energies above and below the Coulomb barrier. The evaporation residues produced in the reaction were detected in a zero-degree ionization chamber providing high efficiency for inverse kinematics. Both coupled-channel calculations and comparison with similar Sn+Ca systems indicate an increased sub-barrier fusion probability that is correlated with the presence of positive Q-value neutron transfer channels. In comparison, the measured fusion excitation functions of $^{130}$Te + $^{58,64}$Ni, which have positive Q-value neutron transfer channels, were accurately reproduced by coupled-channel calculations including only inelastic excitations. The results demonstrate that the coupling of transfer channels can lead to enhanced sub-barrier fusion but this is not directly correlated with positive Q-value neutron transfer channels in all cases.

Z. Kohley; J. F. Liang; D. Shapira; C. J. Gross; R. L. Varner; J. M. Allmond; J. J. Kolata; P. E. Mueller; A. Roberts

2013-06-28T23:59:59.000Z

243

Sub-barrier fusion enhancement with radioactive 134Te  

Science Conference Proceedings (OSTI)

The fusion cross sections of radioactive 134Te + 40Ca were measured at energies above and below the Coulomb barrier. The evaporation residues produced in the reaction were detected in a zero-degree ionization chamber providing high efficiency for inverse kinematics. Both coupled-channel calculations and comparison with similar Sn + Ca systems indicate an increased sub-barrier fusion probability that is correlated with the presence of positive Q-value neutron transfer channels. In comparison, the measured fusion excitation functions of 130Te + 58,64Ni, which have positive Q-value neutron transfer channels, were accurately reproduced by coupled-channel calculations including only inelastic excitations. The results demonstrate that the coupling of transfer channels can lead to enhanced sub-barrier fusion but this is not directly correlated with positive Q-value neutron transfer channels in all cases.

Kohley, Zachary W [ORNL; Liang, J Felix [ORNL; Shapira, Dan [ORNL; Gross, Carl J [ORNL; Varner Jr, Robert L [ORNL; Allmond, James M [ORNL; Kolata, Jim J [University of Notre Dame, IN; Mueller, Paul Edward [ORNL; Roberts, Amy [University of Notre Dame, IN

2013-01-01T23:59:59.000Z

244

MHK Projects/TE4 | Open Energy Information  

Open Energy Info (EERE)

TE4 TE4 < MHK Projects Jump to: navigation, search << Return to the MHK database homepage Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":5,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"500px","height":"350px","centre":false,"title":"","label":"","icon":"File:Aquamarine-marker.png","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":52.3247,"lon":1.68765,"alt":0,"address":"","icon":"http:\/\/prod-http-80-800498448.us-east-1.elb.amazonaws.com\/w\/images\/7\/74\/Aquamarine-marker.png","group":"","inlineLabel":"","visitedicon":""}]}

245

Formation and Characterization of CdSxTe1-x Alloys Prepared from Thin Film Couples of CdS and CdTe: Preprint  

DOE Green Energy (OSTI)

This conference paper describes the alloying between CdS and CdTe at the CdS/CdTe interface is a function of the growth temperature and post-deposition CdCl2 heat treatment (HT). In devices prepared by different techniques, Te-rich CdSxTe1-x alloys with x= 0.04 to 0.08 have been identified. We present our work on thin-film couples of CdS and CdTe, which can withstand higher level of CdCl2 treatment without the adhesion problems typically encountered in the regular device structure. CdS films with a thickness of {approx}100 nm were deposited by chemical-bath deposition on glass/SnO2 substrates, and CdTe films with a thickness of 300 and 800 nm were deposited by close-spaced sublimation. The samples were treated in the presence of vapor CdCl2 at 400-450 C for 5 min. X-ray diffraction and optical analysis of the samples showed that S content in the CdSxTe1-x alloy increased systematically with the CdCl2 HT temperature. CdSxTe1-x alloy with x= 0.14 was identified for the samples treated at 4 30C, which is much higher than expected from the miscibility gap at 430C.

Dhere, R.; Wu, X.; Albin, D.; Perkins, C.; Moutinho, H.; Gessert, T.

2002-05-01T23:59:59.000Z

246

Flat beams in a 50 TeV hadron collider  

SciTech Connect

The basic beam dynamics of a next generation 50 x 50 TeV hadron collider based on a high field magnet approach have been outlined over the past several years. Radiation damping not only produces small emittances, but also flat beams, just as in electron machines. Based on {open_quotes}Snowmass 96{close_quotes} parameters, we investigate the issues associated with flat beams in very high energy hadron colliders.

Peggs, S.; Harrison, M.; Pilat, F.; Syphers, M.

1997-08-01T23:59:59.000Z

247

Mr. John E. Kieling, Chief Hazardous Was te Bureau  

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

John E. Kieling, Chief John E. Kieling, Chief Hazardous Was te Bureau Depa rtment of Energy Carlsbad Field Office P. O. Box 3090 Carlsbad , New Mexico 88221 NOV 0 5 2013 New Mexico Environment Department 2905 Rodeo Park Drive East. Building 1 Santa Fe, New Mexico 87505-6303 Subject: Panel 6 Closure and Final Waste Emplacement Notifications Dear Mr. Kieling : The purpose of this leiter is 1 0 notify th e New Mexico Environment Department (NMEO) that the

248

UNIVERSITY OF CALIFORNIA Search for a TeV Component of GammaRay Bursts  

E-Print Network (OSTI)

in Mo while formation of the debris loops is more prominent in Ta. Another predicted behavior which is in accord with TEM observations is that debris formation occurs more readily under higher temperature and

California at Santa Cruz, University of

249

ELUTIONS Inc formerly TeCom | Open Energy Information  

Open Energy Info (EERE)

ELUTIONS Inc formerly TeCom ELUTIONS Inc formerly TeCom Jump to: navigation, search Name ELUTIONS Inc (formerly TeCom) Place Tampa, Florida Zip 33605 Sector Efficiency Product Tampa-based wireless enterprise automation solutions firm. Elutions provides an Active Energy Management service allowing users to increase efficiency by monitoring, forecasting and analyzing utility resource consumption. Coordinates 27.94653°, -82.459269° 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":27.94653,"lon":-82.459269,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

250

Thermodynamic evaluation of the CdTe deposition by an elemental co-evaporation method under isothermal transport conditions  

SciTech Connect

Thermodynamic potential diagrams were used to predict the conditions for depositing cadmium telluride thin films from two independent elemental sources, Cd and Te, while keeping sources and substrate at the same temperature. The potential diagrams also allowed the evaluation of the influence of gaseous contaminants, such as oxygen, on the formed condensed phases. The method may be applied to the deposition of other compounds as long as their vapor pressures are much smaller than the vapor pressures of the constituent elements. The thermodynamic calculation suggested that the film may be deposited under total pressure of 10-4 mbar and at temperatures as low as 450 deg. C. This total pressure is easily achieved by a mechanical pump and the low temperature range allows the use of low cost glass substrates. The preliminary results showed that the films deposited under the conditions predicted by the thermodynamic calculations were uniform and crystalline, as confirmed by scanning electron microscopy and X-ray diffraction.

Ribeiro, M.C.R. [Pontificia Universidade Catolica do Rio de Janeiro, Departamento de Ciencia dos Materiais e Metalurgia, Rua Marques de Sao Vicente, 225 Gavea, 22453-900 Rio de Janeiro, RJ (Brazil)]. E-mail: mriccio@dcmm.puc-rio.br; Cruz, L.R. [Instituto Militar de Engenharia, Departamento de Engenharia Mecanica e de Materiais, Praca General Tiburcio, 80 Urca, 22290-270 Rio de Janeiro, RJ (Brazil); Avillez, R.R. de [Pontificia Universidade Catolica do Rio de Janeiro, Departamento de Ciencia dos Materiais e Metalurgia, Rua Marques de Sao Vicente, 225 Gavea, 22453-900 Rio de Janeiro, RJ (Brazil)

2006-01-05T23:59:59.000Z

251

Development of ZnTe:Cu Contacts for CdTe Solar Cells: Cooperative Research and Development Final Report, CRADA Number CRD-08-320  

DOE Green Energy (OSTI)

The main focus of the work at NREL was on the development of Cu-doped ZnTe contacts to CdTe solar cells in the substrate configuration. The work performed under the CRADA utilized the substrate device structure used at NREL previously. All fabrication was performed at NREL. We worked on the development of Cu-doped ZnTe as well as variety of other contacts such as Sb-doped ZnTe, CuxTe, and MoSe2. We were able to optimize the contacts to improve device parameters. The improvement was obtained primarily through increasing the open-circuit voltage, to values as high as 760 mV, leading to device efficiencies of 7%.

Dhere, R.

2012-04-01T23:59:59.000Z

252

Gravitational Wave Sources from New Physics  

E-Print Network (OSTI)

Forthcoming advances in direct gravitational wave detection from kilohertz to nanohertz frequencies have unique capabilities to detect signatures from or set meaningful constraints on a wide range of new cosmological phenomena and new fundamental physics. A brief survey is presented of the post-inflationary gravitational radiation backgrounds predicted in cosmologies that include intense new classical sources such as first-order phase transitions, late-ending inflation, and dynamically active mesoscopic extra dimensions. LISA will provide the most sensitive direct probes of such phenomena near TeV energies or Terascale. LISA will also deeply probe the broadband background, and possibly bursts, from loops of cosmic superstrings predicted to form in current models of brane inflation.

Craig J. Hogan

2006-08-25T23:59:59.000Z

253

Bismuth-induced deep levels and carrier compensation in CdTe  

Science Conference Proceedings (OSTI)

First-principles calculations show that Bi on Cd site in CdTe can be either a donor, Bi_Cd+, or an acceptor, Bi_Cd- , depending on the Fermi level. The can bind a substitutional O (O_Te) with large binding energy of 1.40 eV. The calculated (0/-) transition level for B_Cd- - O_Te complex is in good agreement with the observed deep hole trapping level. Bi can also substitute Te to form an acceptor. The amphoteric nature of Bi in CdTe results in the pinning of the Fermi level and the high resistivity. We also discuss the origin of p-type CdTe at high Bi doping level.

Du, Mao-Hua [ORNL

2008-01-01T23:59:59.000Z

254

The Effect of Structural Vacancies on the Thermoelectric Properties of (Cu2Te)1-x(Ga2Te3)x  

SciTech Connect

We have studied the effects of structural vacancies on the thermoelectric properties of the ternary compounds (Cu2Te)1-x(Ga2Te3)x (x = 0.5, 0.55, 0.571, 0.6, 0.625, 0.667 and 0.75), which are solid solutions found in the pseudo-binary phase diagram for Cu2Te and Ga2Te3. This system possesses tunable structural vacancy concentrations. The x= 0.5 phase, CuGaTe2, is nominally devoid of structural vacancies, while the rest of the compounds contain varying amounts of these features, and the volume density of vacancies increases with Ga2Te3 content. The sample with x = 0.5, 0.55, 0.571, 0.6, 0.625 crystallize in the chalcopyrite structure while the x = 0.667 and 0.75 adopt the Ga2Te3 defect zinc blende structure. Strong scattering of heat carrying phonons by structural defects, leads to the reduction of thermal conductivity, which is beneficial to the thermoelectric performance of materials. On the other hand, these defects also scatter charge carriers and reduce the electrical conductivity. All the samples investigated are p-type semiconductors as inferred by the signs of their respective Hall (RH) and Seebeck (S) coefficients. The structural vacancies were found to scatter phonons strongly, while a combination of increased carrier concentration, and vacancies decreases the Hall mobility ( H), degrading the overall thermoelectric performance. The room temperature H drops from 90 cm2/V s for CuGaTe2 to 13 cm2/V s in Cu9Ga11Te21 and 4.6 cm2/V s in CuGa3Te5. The low temperature thermal conductivity decreases significantly with higher Ga2Te3 concentrations (higher vacancy concentration) due to increased point defect scattering which dominate thermal resistance terms. At high temperatures, the dependence of thermal conductivity on the Ga2Te3 content is less significant. The presence of strong Umklapp scattering leads to low thermal conductivity at high temperatures for all samples investigated. The highest ZT among the samples in this study was found for the defect-free CuGaTe2 with ZT ~ 1.0 at 840K.

Ye, Zuxin [GM Research and Development Center; Cho, Jung Y [GM R& D and Planning, Warren, Michigan; Tessema, Misle [GM Research and Development Center; Salvador, James R. [GM R& D and Planning, Warren, Michigan; Waldo, Richard [GM R& D and Planning, Warren, Michigan; Wang, Hsin [ORNL; Cai, Wei [ORNL

2013-01-01T23:59:59.000Z

255

High Efficiency Single Crystal CdTe Solar Cells: November 19, 2009 - January 31, 2011  

DOE Green Energy (OSTI)

The goal of the program was to develop single crystal CdTe-based top cells grown on Si solar cells as a platform for the subsequent manufacture of high efficiency tandem cells for CPV applications. The keys to both the single junction and the tandem junction cell architectures are the ability to grow high quality single-crystal CdTe and CdZnTe layers on p-type Si substrates, to dope the CdTe and CdZnTe controllably, both n and p-type, and to make low resistance ohmic front and back contacts. EPIR demonstrated the consistent MBE growth of CdTe/Si and CdZnTe/Si having high crystalline quality despite very large lattice mismatches; epitaxial CdTe/Si and CdZnTe/Si consistently showed state-of-the-art electron mobilities and good hole mobilities; bulk minority carrier recombination lifetimes of unintentionally p-doped CdTe and CdZnTe grown by MBE on Si were demonstrated to be consistently of order 100 ns or longer; desired n- and p-doping levels were achieved; solar cell series specific resistances <10 ?-cm2 were achieved; A single-junction solar cell having a state-of-the-art value of Voc and a unverified 16.4% efficiency was fabricated from CdZnTe having a 1.80 eV bandgap, ideal for the top junction in a tandem cell with a Si bottom junction.

Carmody, M.; Gilmore, A.

2011-05-01T23:59:59.000Z

256

Novel CdTe Cell Fabrication Process with Potential for Low Cost and High Throughput  

DOE Green Energy (OSTI)

There are several production disadvantages inherent in the conventional SnO(2)/CdS/CdTe manufacturing processes. In this paper, we report a novel manufacturing process for fabrication of polycrystalline Cd(2)SnO(4)/Zn(2)/SnO(4)/CdS/CdTe thin-film solar cells that yielded a CdS/CdTe device with an NREL-confirmed efficiency of 14.0%.

Wu, X.; Sheldon, P.

2000-01-01T23:59:59.000Z

257

Fabrication of stable, large-area, thin-film CdTe photovoltaic modules. Annual subcontract report, 10 May 1991--9 May 1992  

DOE Green Energy (OSTI)

Solar Cells, Inc (SCI) has a program to produce 60 cm X 120 cm solar modules based on CdTe films. The method of choice for semiconductor deposition is condensation from high temperature vapor`s. Early work focussed on Close Spaced Sublimation and Chemical Vapor Deposition using elemental sources, but later equipment designs no longer strictly conform to either category. Small area efficiency has been confirmed by NREL at 9.3% on a 0.22 cm{sup 2} device (825 mV Voc, 18.2 mA/cm{sup 2} Jsc, and 0.62 FF) deposited on a 100 cm{sup 2} substrate. On 8 cell, 64 cm{sup 2} submodules, the best result to date is 7.3% (5.9 V Voc, 130 mA Isc, and 0.61 FF). CdS, CdTe, and ZnTe films have been deposited onto 60 cm X 120 cm substrates - single cells produced from this material have exceeded 8% efficiency, 64 cm{sup 2} submodules have exceeded 5%. Module efficiency is limited by mechanical defects - mostly shunts - associated with processing after deposition of the semiconductor layer`s. Present best result is 1.4% total area efficiency. In anticipation of more advanced designs, CdTe films have also been deposited from apparatus employing elemental sources. This project is in an early stage and has produced only rudimentary results. A pro-active Safety, Health, Environmental and Disposal program has been developed. Results to date indicate that both employees and the environment have been protected against overexposure to hazards including toxic chemicals.

Nolan, J.F.; Meyers, P.V. [Solar Cells, Inc., Toledo, OH (United States)

1992-09-01T23:59:59.000Z

258

Electrolytes for power sources  

DOE Patents (OSTI)

Electrolytes for power sources, particularly alkaline and acidic power sources, comprising benzene polysulfonic acids and benzene polyphosphonic acids or salts of such acids.

Doddapaneni, Narayan (Albuquerque, NM); Ingersoll, David (Albuquerque, NM)

1995-01-01T23:59:59.000Z

259

Electrolytes for power sources  

DOE Patents (OSTI)

Electrolytes are disclosed for power sources, particularly alkaline and acidic power sources, comprising benzene polysulfonic acids and benzene polyphosphonic acids or salts of such acids. 7 figures.

Doddapaneni, N.; Ingersoll, D.

1995-01-03T23:59:59.000Z

260

Calibrated Neutron Sources  

Science Conference Proceedings (OSTI)

... NIST designed a compliant source. ... needed for new purposes and as old sources decay ... The figure shows a reprentative energy spectrum from such ...

2013-07-30T23:59:59.000Z

Note: This page contains sample records for the topic "ta te source" 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.


261

Electrical properties of PbTe single crystals with excess tellurium  

Science Conference Proceedings (OSTI)

The effects of excess (up to 0.1 at %) Te atoms and heat treatment at 473 and 573 K for 120 h on the conductivity {sigma}, thermopower {alpha}, and Hall coefficient R of PbTe single crystals are studied. It is shown that excess Te atoms and annealing strongly affect the values and character of the temperature dependences of these parameters and the signs of {alpha} and R at low temperatures, which is caused by the acceptor effect of these atoms and the formation of antisite defects due to localization of Te in vacancies of the lead sublattice upon annealing.

Bagiyeva, G. Z., E-mail: bagieva-gjulandam@rambler.ru; Mustafayev, N. B.; Abdinova, G. Dj.; Abdinov, D. Sh. [National Academy of Sciences of Azerbaijan, Abdullaev Institute of Physics (Azerbaijan)

2011-11-15T23:59:59.000Z

262

Simulated Performance of the GammaTracker CdZnTe Handheld ...  

Simulated Performance of the GammaTracker CdZnTe Handheld Radioisotope Identifier Carolyn E. Seifert, Member, IEEE, Mitchell J. Myjak, Member, IEEE, ...

263

Mechanical Properties of Thermoelectric Materials PbTe-PbS and ...  

Science Conference Proceedings (OSTI)

... thermoelectric (TE) materials for a variety of applications, including the conversion of waste heat energy into electricity. LAST (Lead-Antimony-Silver-

264

Electrodeposition of PbTe Thermoelectric Materials in NaOH Solutions  

Science Conference Proceedings (OSTI)

Dissolution Kinetics of Steelmaking Slag and Its Promotion for the Growth of Algae · Electrodeposition of PbTe Thermoelectric Materials in NaOH Solutions.

265

Characterization and Analysis of CIGS and CdTE Solar Cells: December 2004 - July 2008  

DOE Green Energy (OSTI)

The work reported here embodies a device-physics approach based on careful measurement and interpretation of data from CIGS and CdTe solar cells.

Sites, J. R.

2009-01-01T23:59:59.000Z

266

NREL Determines Long-Lived Carriers and Differences in CdTe Superstrat...  

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

"Comparison of Minority Carrier Lifetime Measurements in Superstrate and Substrate CdTe PV Devices." Proc. 37 th IEEE Photovoltaic Specialists Conference, 19-24 June 2011,...

267

Review of Photovoltaic Energy Production Using CdTe Thin-Film Modules: Extended Abstract Preprint  

DOE Green Energy (OSTI)

CdTe has near-optimum bandgap, excellent deposition traits, and leads other technologies in commercial PV module production volume. Better understanding materials properties will accelerate deployment.

Gessert, T. A.

2008-09-01T23:59:59.000Z

268

Characterization of Heterogeneities in Detector-Grade CdZnTe Crystals  

Science Conference Proceedings (OSTI)

Synthetic Cd{sub 1-x}ZnxTe or 'CZT' crystals are highly suitable for g-spectrometers operating at room temperature. Secondary phases (SP) within CZT, presumed to be Te metal, have detrimental impacts on the charge collection efficiency of fabricated device. Using analytical techniques rather than arbitrary theoretical definitions, we identify two SP morphologies: (i) many void, 20-{mu}m 'negative' crystals with 65-nm nanoparticle residues of Si, Cd, Zn, and Te and (ii) 20-{mu}m hexagonal-shaped bodies, which are composites of metallic Te layers with cores of amorphous and polycrystalline CZT material that surround the voids.

Duff, M.; Hunter, D; Burger, A; Groza, M; Buliga, V; Bradley, J; Graham, G; Dai, Z; Lanzirotti, A; et. al.

2009-01-01T23:59:59.000Z

269

Floodplain Assessment for the Proposed Engineered Erosion Controls at TA-72 in Lower Sandia Canyon, Los Alamos National Laboratory  

SciTech Connect

Los Alamos National Laboratory (LANL) is preparing to implement engineering controls in Sandia Canyon at Technical Area (TA) 72. Los Alamos National Security (LANS) biologists conducted a floodplain determination and this project is located within a 100-year floodplain. The proposed project is to rehabilitate the degraded channel in lower Sandia Canyon where it crosses through the outdoor firing range at TA-72 to limit the loss of sediment and dissipate floodwater leaving LANL property (Figure 1). The proposed construction of these engineered controls is part of the New Mexico Environment Department's (NMED) approved LANL Individual Storm Water Permit. The purpose of this project is to install storm water controls at Sandia Watershed Site Monitoring Area 6 (S-SMA-6). Storm water controls will be designed and installed to meet the requirements of NPDES Permit No. NM0030759, commonly referred to as the LANL Individual Storm Water Permit (IP). The storm water control measures address storm water mitigation for the area within the boundary of Area of Concern (AOC) 72-001. This action meets the requirements of the IP for S-SMA-6 for storm water controls by a combination of: preventing exposure of upstream storm water and storm water generated within the channel to the AOC and totally retaining storm water falling outside the channel but within the AOC.

Hathcock, Charles D. [Los Alamos National Laboratory

2012-08-27T23:59:59.000Z

270

~~~~: Gmt Lakes Cat-bar) ALTERNaTE I  

Office of Legacy Management (LM)

~~~: Gmt Lakes Cat-bar) ~~~: Gmt Lakes Cat-bar) ALTERNaTE I --------------------------------------- NAME: 333 Iv. Mkhi qr) Aw. thka o ~~~---~~~--~~~_-----__ C I TV : 8 Morim 'Love 82 10 bhh &Q Ir -+----------- STATE- fL I - ------ l OWNER(S) -__----_ past: Current: I --------------------____ Owner contacted q yes p no; _____--_____-____------~~~l if yes, data contacted -_--------__- TYPE OF OPERATION ---_------------- 0 Research & Development q Production scale testing 0 Pilot Scale 0 Bench Scale process 0 Theoretical Studies 0 Sample & Analysis Facility Type p Manufacturing I ! fJ University 0 Research Organization ! 0 Government Sponsored F+ci li ty 0 Other ----~~-~~~----~------ 0 Production 0 Disposal/Storage TYPE OF CUNTRKT ----~---~__----_ / w Prime

271

Multiple charge density wave transitions in Gd2Te5  

Science Conference Proceedings (OSTI)

Diffraction measurements performed via transmission electron microscopy and high resolution X-ray scattering reveal two distinct charge density wave transitions in Gd{sub 2}Te{sub 5} at T{sub c1} = 410(3) and T{sub c2} = 532(3) K, associated with the on-axis incommensurate lattice modulation and off-axis commensurate lattice modulation respectively. Analysis of the temperature dependence of the order parameters indicates a non-vanishing coupling between these two distinct CDW states.

Shin, K.Y.; Ru, N.; /Stanford U., Geballe Lab. /Stanford U., Appl. Phys. Dept.; Condron, C.L.; /SLAC, SSRL; Wu, Y.Q.; Kramer, M.J.; Toney, M.F.; /Ames Lab /Iowa State U., Dept. Mater. Sci. /SLAC, SSRL; Fisher, I.R.; /Stanford U., Geballe Lab. /Stanford U., Appl. Phys. Dept.

2010-02-15T23:59:59.000Z

272

Conformal and projection diagrams in LaTeX  

E-Print Network (OSTI)

In general relativity, the causal structure of space-time may sometimes be depicted by conformal Carter-Penrose diagrams or a recent extension of these - the projection diagrams. The introduction of conformal diagrams in the sixties was one of the progenitors of the golden age of relativity. They are the key ingredient of many scientific papers. Unfortunately, drawing them in the form suitable for LaTeX documents is time-consuming and not easy. We present below a library that allows one to draw an arbitrary conformal diagram in a few simple steps.

Christa R. Ölz; Sebastian J. Szybka

2013-05-09T23:59:59.000Z

273

ENERGY COMMISSION APPL.lCATION FOR SOURCE MATERIAL LICENSE  

Office of Legacy Management (LM)

COMMISSION COMMISSION APPL.lCATION FOR SOURCE MATERIAL LICENSE Pursuant to the rcgu!ations in Title 10, Code of Federal Regulations, Chapter 1, Part 40, application is hereby made for a license to receive, possess, use, transfer, deliver or import into the United Stat-, source material for the activity or activities described. 1. (check ooa) 2. NAME OF APPLICANT W. R. GRACE 6 Co. 0 (a) New Iicense 0 (b) Amendment to License No.- Davison Chemical Division STA-422 3. Q (c) Renewal of Licensr No. 0 (d) Previous License No. Pompton Plains, N. J. 4. ST,.TE THE AOORESS(ES) AT WHICH SOURCE MATERIAL WILL BE POSSESSED OR USED 868 Black Oak Ridge Road, Wayne, fi. J. a*ocY s up/'l File IF 5. BUSINESS OR OCCUPATION I 6. (a) IF APPLICANT IS AN INDIVIDUAL. STATE CITIZENSHIP

274

Source Selection Guide | Department of Energy  

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

Source Selection Guide Source Selection Guide Source Selection Guide More Documents & Publications Source Selection Guide Source Selection Guide Source Selection...

275

Offering Songs, Festive Songs, Processional Songs mGar-gLu, Khro-Glu, Phebsnga: Tashi Tsering's Music: Ta po sam ten gyam pa, 'Dream about Tibet'  

E-Print Network (OSTI)

last updated on Monday, 4 April 2011 Accession Form for Individual Recordings: Collection / Collector Name mGar glu / Katey Blumenthal Tape No. / Track / Item No. 06_14_2010_Ta po sam ten gyam pa.WAV Length of track 00:03:53 Title of track Ta po... ) Date of recording 06/14/2010 Place of recording Lo Monthang, Mustang, Nepal Name(s), age, sex, place of birth of performer(s) Tashi Tsering, unknown age, Male, Lo Monthang, Mustang, Nepal. Language of recording Logay Performer(s)’s first / native...

Blumenthal, Katey

276

TeV blazar gamma-ray emission produced by a cooling pile-up particle energy distribution function  

E-Print Network (OSTI)

We propose a time-dependent one-zone model based on a quasi-Maxwellian `pile-up' distribution in order to explain the time-averaged high energy emission of TeV blazars. The instantaneous spectra are the result of the synchrotron and synchrotron self-Compton emission (SSC) of ultra-relativistic leptons. The particle energy distribution function (EDF) is computed in a self-consistent way, taking into account an injection term of fresh particles, a possible pair creation term, and the particles radiative cooling. The source term is not a usual power-law but rather a `pile-up' distribution, which can result from the combination of a stochastic heating via second order Fermi process and radiative cooling. To validate this approach, we have performed time-averaged fits of the well-known TeV emitter Mrk 501 during the 1997 flaring activity period taking into account the attenuation of the high energy component by cosmic diffuse infrared background (DIrB) and intrinsic absorption via the pair creation process. The model can reproduce very satisfactorily the observed spectral energy distribution (SED). A high Lorentz factor is required to avoid strong pair production; in the case of smaller Lorentz factor, an intense flare in the GeV range is predicted due to the sudden increase of soft photons density below the Klein-Nishina threshold. The possible relevance of such a scenario is discussed.

Ludovic Sauge; Gilles Henri

2004-08-12T23:59:59.000Z

277

Source Tree Composition  

E-Print Network (OSTI)

Dividing software systems in components improves software reusability as well as software maintainability. Components live at several levels, we concentrate on the implementation level where components are formed by source files, divided over directory structures. Such source code components are usually strongly coupled in the directory structure of a software system. Their compilation is usually controlled by a single global build process. This entangling of source trees and build processes often makes reuse of source code components in different software systems difficult. It also makes software systems inflexible because integration of additional source code components in source trees and build processes is difficult. This paper's subject is to increase software reuse by decreasing coupling of source code components. It is achieved by automized assembly of software systems from reusable source code components and involves integration of source trees, build processes, and configuration processes. Application domains include generative programming, product-line architectures, and commercial off-the-shelf (COTS) software engineering.

Merijn De Jonge

2001-01-01T23:59:59.000Z

278

Simple shear processing of bulk BI?TE? alloys  

E-Print Network (OSTI)

The objective of this work is to determine the appropriate extrusion conditions of cast Bi?Te? alloys via equal channel angular extrusion (ECAE) to produce material that has a fine grain size (5~30[]m), uniform grain morphology and low grain boundary misorientation for improving thermoelectric and mechanical properties. The range of variables examined in this study includes: alloy type (p- and n-type) extrusion temperature (400 ~ 525?C), extrusion route (A, B, C and E), extrusion speed (0.3 ~ 0.01 in/min), and the number of extrusions (1, 2, 4 and 8). The microstructure is characterized by a polarized optical microscopy. Successful extrusions were accomplished at a temperature and strain rate that enabled dynamic recrystallization. Holding in the hot die after extrusion encouraged grain growth. The post processed grain size is found to be strongly dependent on extrusion temperature and extrusion speed. The microstructural uniformity is found to be dependent on the number of extrusions and extrusion route. Uniform equiaxial grain of 10 to 30mm average size are obtained in the p-type alloy after four extrusion passes following route E at a temperature of 500?C and an extrusion speed of 0.1 in/min. The results encourage further work and indicate ECAE is a viable method of grain refinement of Bi?Te? alloys.

Im, Jae-taek

2001-01-01T23:59:59.000Z

279

Advanced CdTe Photovoltaic Technology: September 2007 - March 2009  

DOE Green Energy (OSTI)

During the last eighteen months, Abound Solar (formerly AVA Solar) has enjoyed significant success under the SAI program. During this time, a fully automated manufacturing line has been developed, fabricated and commissioned in Longmont, Colorado. The facility is fully integrated, converting glass and semiconductor materials into complete modules beneath its roof. At capacity, a glass panel will enter the factory every 10 seconds and emerge as a completed module two hours later. This facility is currently undergoing trials in preparation for large volume production of 120 x 60 cm thin film CdTe modules. Preceding the development of the large volume manufacturing capability, Abound Solar demonstrated long duration processing with excellent materials utilization for the manufacture of high efficiency 42 cm square modules. Abound Solar prototype modules have been measured with over 9% aperture area efficiency by NREL. Abound Solar demonstrated the ability to produce modules at industry leading low costs to NREL representatives. Costing models show manufacturing costs below $1/Watt and capital equipment costs below $1.50 per watt of annual manufacturing capacity. Under this SAI program, Abound Solar supported a significant research and development program at Colorado State University. The CSU team continues to make progress on device and materials analysis. Modeling for increased device performance and the effects of processing conditions on properties of CdTe PV were investigated.

Barth, K.

2011-05-01T23:59:59.000Z

280

A Search for TeV Emission from Active Galaxies using the Milagro Observatory  

E-Print Network (OSTI)

: Professor Gregory W. Sullivan, Chairman/Advisor Professor Jordan A. Goodman Professor Rabindra N. Mohapatra that observes very high energy gamma rays (100 GeV to 100 TeV) using the water-Cerenkov techniqueV candidates. Active galaxies have been observed to be highly variable at TeV energies. To test for episodic

California at Santa Cruz, University of

Note: This page contains sample records for the topic "ta te source" 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.


281

Search for Short Duration Bursts of TeV Gamma Rays with the Milagrito Telescope  

E-Print Network (OSTI)

OG 2.3.07 Search for Short Duration Bursts of TeV Gamma Rays with the Milagrito Telescope Gus for short duration bursts of TeV photons. Such bursts may result from "traditional" gamma-ray bursts to gamma-ray bursts, the final stages of black hole evaporation) the most compelling reason may

California at Santa Cruz, University of

282

Charge transport in mixed CdSe and CdTe colloidal nanocrystal films  

E-Print Network (OSTI)

We report the influence of trap states on charge transport through films of mixed CdTe and CdSe nanocrystals (NCs) between lateral electrodes, through layered films of CdTe and CdSe NCs in a layered geometry, and through ...

Bawendi, Moungi G.

283

Effects of Surface Composition on CdTe/CdS Device Performance  

DOE Green Energy (OSTI)

The atomic composition of the back surface of the CdTe layer in a CdTe/CdS photovoltiac (PV) device has a significant influence on the quality of the electrical contact to this layer. This paper reports the results of a systematic study that correlates the composition of the back surface with pre-contact processing and device performance.

Levi, D.; Albin, D.; King, D.

2000-01-01T23:59:59.000Z

284

Fabrication and Physics of CdTe Devices by Sputtering: Final Report, 1 March 2005 - 30 November 2008  

DOE Green Energy (OSTI)

Work to understand CdS/CdTe solar cell device physics; increase magnetron sputtering rate (while keeping high device quality); reduce thickness of CdTe layers (while keeping voltage and fill factor).

Compaan, A.; Collins, R.; Karpov, V.; Giolando, D.

2009-04-01T23:59:59.000Z

285

Distributed fault management in WBEM-Based Inter-AS TE for qos guaranteed DiffServ-over–MPLS  

Science Conference Proceedings (OSTI)

Distributed fault management and event notification are essential in Inter-AS Traffic Engineering (TE). In this paper we design and implement distributed fault management for WBEM based inter-AS TE. We designed DMTF Managed Object Format (MOF) based ...

Abdurakhmon Abdurakhmanov; Shahnaza Tursunova; Shanmugham Sundaram; Young-Tak Kim

2006-09-01T23:59:59.000Z

286

Optical, magnetic, and transport behaviors of Ge{sub 1-x}Mn{sub x}Te ferromagnetic semiconductors grown by molecular-beam epitaxy  

SciTech Connect

The optical, magnetic, and transport behaviors of Ge{sub 1-x}Mn{sub x}Te (x=0.24 and 0.55) grown by solid-source molecular-beam epitaxy are investigated. X-ray diffraction shows that Ge{sub 1-x}Mn{sub x}Te crystallizes in rocksalt structure. The temperature-dependent magnetization (M-T) for x=0.55 sample gives a Curie paramagnetic temperature of {theta}{sub p}{approx}180 K, which is consistent with the temperature-dependent resistivity {rho}(T) measurement. Anomalous Hall effect is clearly observed in the samples and can be attributed to extrinsic skew scattering based on the scaling relationship of {rho}{sub xy}{proportional_to}{rho}{sub xx}{sup 1.06}. The magnetoresistance of Ge{sub 1-x}Mn{sub x}Te is isotropic and displays a clear hysterestic loop at low temperature, which resembles that of giant-magnetoresistance granular system in solids.

Chen, W. Q.; Bi, J. F.; Teo, K. L.; Liew, T.; Chong, T. C. [Information Storage Materials Laboratory, Electrical and Computer Engineering Department, National University of Singapore, 4 Engineering Drive 3, Singapore 117576, Singapore and Data Storage Institute, 5 Engineering Drive 1, Singapore 117608 (Singapore); Lim, S. T.; Sim, C. H. [Graduate School for Integrative Sciences and Engineering, National University of Singapore, 28 Medical Drive, Singapore 117456 (Singapore)

2008-09-15T23:59:59.000Z

287

Phase formation and phase transformations in Bi-Te films with nanoscale thickness  

Science Conference Proceedings (OSTI)

The processes of phase formation are studied in a binary Bi-Te system using the kinematic electron diffraction technique. It is established that, in the case of both simultaneous and layer-by-layer deposition of bismuth and tellurium and irrespective of the order of their deposition, phases with compositions Bi{sub 2}Te{sub 3} and BiTe are formed at the condensation plane in the amorphous and crystalline state, respectively. The amorphous Bi{sub 2}Te{sub 3} phase is stable at room temperature and crystallizes at a temperature of 423 K. It is shown that ordering of the phase BiTe is not a consequence of atomic order of the structure; rather, it is caused by the real structure of the object (by blocks)

Akhmedov, K. M. [National Academy of Sciences of Azerbaijan, Institute of Physics (Azerbaijan)], E-mail: axmedovqurban@rambler.ru

2008-09-15T23:59:59.000Z

288

Health and environmental hazards of CdTe photovoltaic module production, use and decommissioning  

DOE Green Energy (OSTI)

Health and environmental (H&E) risks presented by CdTe photovoltaic module production, use and decommissioning have been reviewed and discussed by several authors. Several H&E concerns exit. The estimated risks are based on extrapolations of toxicity, environmental mobility, and bioavailability data for other inorganic cadmium compounds. Little information, however, is available about CdTe itself. In response to the increased interest in CdTe, Brookhaven National Laboratory (BNL) has been engaged in a cooperative research program with the National Institute of Environmental Health Sciences (NIEHS), the Fraunhofer Institute for Solid State Technology (IFT), and the GSF Institute of Chemical Ecology to develop fundamental toxicological and environmental data for CdTe. This paper describes the results of these studies, and their potential implications with respect to the H&E hazards presented by CdTe module production, use and decommissioning.

Moskowitz, P.D. [Brookhaven National Lab., Upton, NY (United States); Steinberger, H. [Fraunhofer Institut fur Festkorpertechnologie, Munchen (Germany); Thumm, W. [GSF-Institute of Ecological Chemistry, Oberschleissheim (Germany)

1995-02-01T23:59:59.000Z

289

Te Inclusions in CZT Detectors: New Method for Correcting Their Adverse Effects  

Science Conference Proceedings (OSTI)

Both Te inclusions and point defects can trap the charge carriers generated by ionizing particles in CdZnTe (CZT) detectors. The amount of charge trapped by point defects is proportional to the carriers’ drift time and can be corrected electronically. In the case of Te inclusions, the charge loss depends upon their random locations with respect to the electron cloud. Consequently, inclusions introduce fluctuations in the charge signals, which cannot be easily corrected. In this paper, we describe direct measurements of the cumulative effect of Te inclusions and its influence on the response of CZT detectors of different thicknesses and different sizes and concentrations of Te inclusions. We also discuss a means of partially correcting their adverse effects.

Bolotnikov, A.E.; Babalola, S.; Camarda, G.S.; Cui, Y.; Egarievwe, S.U.; Hawrami, R.; Hossain, A.; Yang, G.; James, R.B.

2009-10-25T23:59:59.000Z

290

Te Inclusions in CZT Detectors: New Method for Correcting Their Adverse Effects  

Science Conference Proceedings (OSTI)

Both Te inclusions and point defects can trap the charge carriers generated by ionizing particles in CdZnTe (CZT) detectors. The amount of charge trapped by point defects is proportional to the carriers' drift time and can be corrected electronically. In the case of Te inclusions, the charge loss depends upon their random locations with respect to the electron cloud. Consequently, inclusions introduce fluctuations in the charge signals, which cannot be easily corrected. In this paper, we describe direct measurements of the cumulative effect of Te inclusions and its influence on the response of CZT detectors of different thicknesses and different sizes and concentrations of Te inclusions. We also discuss a means of partially correcting their adverse effects.

Bolotnikov, A.; Babaloa, S; Camarda, G; Cui, Y; Egarievwe, S; Hawrami, R; Hossain, A; Yang, G; James, R

2010-01-01T23:59:59.000Z

291

V-183: Cisco TelePresence TC and TE Bugs Let Remote Users Deny Service and  

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

3: Cisco TelePresence TC and TE Bugs Let Remote Users Deny 3: Cisco TelePresence TC and TE Bugs Let Remote Users Deny Service and Remote Adjacent Authenticated Users Gain Root Shell Access V-183: Cisco TelePresence TC and TE Bugs Let Remote Users Deny Service and Remote Adjacent Authenticated Users Gain Root Shell Access June 21, 2013 - 6:00am Addthis PROBLEM: Three vulnerabilities were reported in Cisco TelePresence TC and TE PLATFORM: The following product models are affected by the vulnerabilities: Cisco TelePresence MX Series Cisco TelePresence System EX Series Cisco TelePresence Integrator C Series Cisco TelePresence Profiles Series running Cisco TelePresence Quick Set Series Cisco IP Video Phone E20 ABSTRACT: Cisco TelePresence TC and TE Software contain two vulnerabilities in the implementation of the Session Initiation Protocol (SIP) that could allow an

292

CdTe Feedstock Development and Validation: Cooperative Research and Development Final Report, CRADA Number CRD-08-00280  

DOE Green Energy (OSTI)

The goal of this work was to evaluate different CdTe feedstock formulations (feedstock provided by Redlen) to determine if they would significantly improve CdTe performance with ancillary benefits associated with whether changes in feedstock would affect CdTe cell processing and possibly reliability of cells. Feedstock also included attempts to intentionally dope the CdTe with pre-selected elements.

Albin, D.

2011-05-01T23:59:59.000Z

293

Investigation of Junction Properties of CdS/CdTe Solar Cells and their Correlation to Device Properties (Presentation)  

DOE Green Energy (OSTI)

The objective of the Junction Studies are: (1) understand the nature of the junction in the CdTe/CdS device; (2) correlate the device fabrication parameters to the junction formation; and (3) develop a self consistent device model to explain the device properties. Detailed analysis of CdS/CdTe and SnO{sub 2}/CdTe devices prepared using CSS CdTe is discussed.

Dhere, R. G.; Zhang, Y.; Romero, M. J.; Asher, S. E.; Young, M.; To, B.; Noufi, R.; Gessert, T. A.

2008-05-01T23:59:59.000Z

294

REGISTRATION LIST P PR RE ES SO OL LI IC CI IT TA AT TI IO ON  

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

REGISTRATION LIST REGISTRATION LIST P PR RE ES SO OL LI IC CI IT TA AT TI IO ON N C CO ON NF FE ER RE EN NC CE E August 9, 2011 Holiday Inn Capitol  550 C Street, SW  Washington, DC 20024 Page 1 of 9 Instructions: (iii) Please indicate (by checking the appropriate box) whether the organization you represent is a large business, small business, or not a business. (iv) Please indicate (by checking the appropriate box) whether your name or the name of your organization may be released on the NNSA website as an attendee of this conference. (v) Please provide an email address if you would like it to be released on the NNSA website. An email address cannot be released if you select neither in column (iv). Name Organization Name Large/Small (iii) Release Attendance? (iv) Email (to release)

295

Vibrational signatures of OTe and OTe-VCd in CdTe: A first principles study  

Science Conference Proceedings (OSTI)

Chen et al. [Phys. Rev. Lett. 96 (2006) 035508] experimentally observed vibrational signatures related to defects in oxygen-doped CdTe using ultrahigh resolution Fourier transform infrared (FTIR) spectroscopy. They observed an absorption peak at 350 cm{sup -1}. In addition, for samples grown under certain conditions, they observed two higher frequency peaks (1097 and 1108 cm{sup -1}) at low temperature that merged into one at room-temperature. They attributed the low-frequency peak (350 cm{sup -1}) to the vibration of O{sub Te} and the two higher frequency peaks to the vibrational modes of a O{sub Te}-V{sub Cd} complex. Subsequently, they reported similar modes around 1100 cm{sup -1} in O-doped CdSe [Phys. Rev. Lett. 101 (2008) 195502] which were attributed to an O{sub Se}-V{sub Cd} complex. We employed first-principles DFT calculations to calculate the vibrational modes of O{sub Te} and O{sub Te}-V{sub Cd} complex in CdTe. Our calculations show that the 350 cm{sup -1} mode is consistent with O{sub Te}. However, the frequencies of the modes around 1100 cm{sup -1} are more than twice the expected frequencies for O{sub Te}-V{sub Cd} complexes in CdTe (or O{sub Se}-V{sub Cd} in CdSe), indicating that the O{sub Te}-V{sub Cd} complex cannot be the cause of the observed 1100 cm{sup -1} modes. A search for a new defect model is in order.

Thienprasert, J.T. [Kasetsart University, Thailand; Limpijumnong, Sukit [Kasetsart University, Thailand; Janotti, Anderson [University of California, Santa Barbara; Van de Walle, C.G. [University of California, Santa Barbara; Zhang, Lijun [ORNL; Du, Mao-Hua [ORNL; Singh, David J [ORNL

2010-01-01T23:59:59.000Z

296

Effects of a Ta interlayer on the Titanium Silicide reaction: C40 Formation and scalability of the TiSi2 process  

Science Conference Proceedings (OSTI)

When a Ta layer is deposited at the Si-Ti interface a new phase has been detected, i.e., the TiSi2 C40. The C40-C54 transformation kinetics and the film morphology are consistent with an increase of the nucleation density with respect to the ... Keywords: C40, growth velocity, nucleation rate, scalability

F. La Via; S. Privitera; F. Mammoliti; M. G. Grimaldi

2002-01-01T23:59:59.000Z

297

Probing novel TeV physics through precision calculations of scalar and tensor charges of the nucleon  

E-Print Network (OSTI)

We present an update on the calculation of matrix elements of iso-vector scalar, axial and tensor charges between a neutron and a proton state. These matrix elements are needed to probe novel scalar and tensor interactions in neutron beta-decay that can arise in extensions of the Standard Model at the TeV scale. Our calculations are being done using valence clover fermions on dynamical N_f=2+1+1 HISQ configurations generated by the MILC Collaboration. We provide preliminary estimates of the dependence of these matrix elements on the light quark masses, lattice spacing, and the time separation between the source and sink of the nucleons. We also find that the renormalization constants calculated using the RI-sMOM scheme are close to unity for the HYP smeared HISQ lattices.

Rajan Gupta; Tanmoy Bhattacharya; Anosh Joseph; Saul D. Cohen; Huey-Wen Lin

2012-12-20T23:59:59.000Z

298

Performance of the ATLAS Tau and Missing Energy triggers with 7 TeV proton proton collisions at the LHC  

E-Print Network (OSTI)

A study of the performance of the ATLAS tau and missing energy triggers with data collected in spring 2010 at {\\surd}s = 7 TeV proton-proton collisions at the Large Hadron Collider (LHC) is presented. A comparison was performed between data and Monte Carlo simulations for the tau and missing transverse energy triggers. As well as a comparison between missing transverse energy trigger quantities and their offline reconstructed counterparts. Tau trigger results compare well with predictions from Monte Carlo simulations. Slight deviations are observed for tau shower shape quantities. Possible sources contributing to the discrepancy such as the simulation of the underlying event are currently being studied. The missing transverse energy reconstructed by the Event Filter is well correlated with the offline result. In addition, there is good agreement between the results obtained with collision data and Monte Carlo simulations.

Hooft van Huysduynen, L

2010-01-01T23:59:59.000Z

299

Performance of the ATLAS Tau and Missing Energy triggers with 7 TeV proton proton collisions at the LHC  

E-Print Network (OSTI)

A study of the performance of the ATLAS tau and missing energy triggers with data collected in spring 2010 at {\\surd}s = 7 TeV proton-proton collisions at the Large Hadron Collider (LHC) is presented. A comparison was performed between data and Monte Carlo simulations for the tau and missing transverse energy triggers. As well as a comparison between missing transverse energy trigger quantities and their offline reconstructed counterparts. Tau trigger results compare well with predictions from Monte Carlo simulations. Slight deviations are observed for tau shower shape quantities. Possible sources contributing to the discrepancy such as the simulation of the underlying event are currently being studied. The missing transverse energy reconstructed by the Event Filter is well correlated with the offline result. In addition, there is good agreement between the results obtained with collision data and Monte Carlo simulations.

L. Hooft van Huysduynen

2010-10-05T23:59:59.000Z

300

Sources of Thermodynamic Data  

Science Conference Proceedings (OSTI)

...The thermodynamic data summarized in Table 2 are collected from a variety of sources. The certainty with which

Note: This page contains sample records for the topic "ta te source" 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.


301

Next Generation Light Source  

•Next Generation Light Source – Super Thin Light Bulb, Energy Efficient, Long Life, Dimmable, and Uniform Illumination •High Entry Barrier – 71 ...

302

Studies of Basic Electronic Properties of CdTe-Based Solar Cells and Their Evolution During Processing and Stress; Annual Technical Report, 1 November 2005 - 31 October 2006  

DOE Green Energy (OSTI)

We describe the results of our continuing study of deep electronic states controlling open-circuit voltage in CdTe/CdS thin-film solar cells (Task 1). The study includes: (1) analysis of factors affecting trap signatures derived from admittance spectroscopy and capacitance transients measurements, such as activation-energy capture cross-sections and trap-density estimates, and (2) comparative studies of cells received from four different sources and prepared with significant variations in cell structure and processing procedures.

Beach, J.; Seymour, F. H.; Kaydanov, V. I.; Ohno, T. R.

2007-01-01T23:59:59.000Z

303

DC source assemblies  

SciTech Connect

Embodiments of DC source assemblies of power inverter systems of the type suitable for deployment in a vehicle having an electrically grounded chassis are provided. An embodiment of a DC source assembly comprises a housing, a DC source disposed within the housing, a first terminal, and a second terminal. The DC source also comprises a first capacitor having a first electrode electrically coupled to the housing, and a second electrode electrically coupled to the first terminal. The DC source assembly further comprises a second capacitor having a first electrode electrically coupled to the housing, and a second electrode electrically coupled to the second terminal.

Campbell, Jeremy B; Newson, Steve

2013-02-26T23:59:59.000Z

304

Selection of Russian Plutonium Beryllium Sources for Inclusion in the Nuclear Mateirals Information Program Archive  

Science Conference Proceedings (OSTI)

Throughout the 1960s and 1970s, the former Soviet Union produced and exported Plutonium-Beryllium (PuBe) neutron sources to various Eastern European countries. The Russian sources consist of an intermetallic compound of plutonium and beryllium encapsulated in an inner welded, sealed capsule and consisting of a body and one or more covers. The amount of plutonium in the sources ranges from 0.002 g up to 15 g. A portion of the sources was originally exported to East Germany. A portion of these sources were acquired by Los Alamos National Laboratory (LANL) in the late 1990s for destruction in the Offsite Source Recovery Program. When the OSRP was canceled, the remaining 88 PuBe neutron sources were packaged and stored in a 55-gal drum at T A-55. This storage configuration is no longer acceptable for PuBe sources, and the sources must either be repackaged or disposed of. Repackaging would place the sources into Hagan container, and depending on the dose rates, some sources may be packaged individually increasing the footprint and cost of storage. In addition, each source will be subject to leak-checking every six months. Leaks have already been detected in some of the sources, and due to the age of these sources, it is likely that additional leaks may be detected over time, which will increase the overall complexity of handling and storage. Therefore, it was decided that the sources would be disposed of at the Waste Isolation Pilot Plant (WIPP) due to the cost and labor associated with continued storage at TA-55. However, the plutonium in the sources is of Russian origin and needs to be preserved for research purposes. Therefore, it is important that a representative sample of the sources retained and archived for future studies. This report describes the criteria used to obtain a representative sample of the sources. Nine Russian PuBe neutron sources have been selected out of a collection of 77 sources for inclusion in the NMIP archive. Selection criteria were developed so that the largest sources that are representative of the collection are included. One representative source was chosen for every 20 sources in the collection, and effort was made to preserve sources unique to the collection. In total, four representative sources and five unique sources were selected for the archive. The archive samples contain 40 grams of plutonium with an isotopic composition similar to that of weapon grade material and three grams of plutonium with an isotopic composition similar to that of reactor grade plutonium.

Narlesky, Joshua E [Los Alamos National Laboratory; Padilla, Dennis D [Los Alamos National Laboratory; Watts, Joe [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

305

Plasma graviton production in TeV-scale gravity  

E-Print Network (OSTI)

We develop the theory of interaction of classical plasma with Kaluza-Klein (KK) gravitons in the ADD model of TeV-scale gravity. Plasma is described within the kinetic approach as the system of charged particles and Maxwell field both confined on the brane. Interaction with multidimensional gravity living in the bulk with $n$ compact extra dimensions is introduced within the linearized theory. The KK gravitons emission rates are computed taking into account plasma collective effects through the two-point correlation functions of the fluctuations of the plasma energy-momentum tensor. Apart from known mechanisms (such as bremsstrahlung and gravi-Primakoff effect) we find essentially collective channels such as the coalescence of plasma waves into gravitons which may be manifest in turbulent plasmas. Our results indicate that commonly used rates of the KK gravitons production in stars and supernovae may be underestimated.

E. Yu. Melkumova

2010-12-14T23:59:59.000Z

306

Additional Characterization of Min-K TE-1400 Thermal Insulation  

Science Conference Proceedings (OSTI)

Min-K 1400TE (Thermal Ceramics, Augusta, Georgia) insulation material was further characterized at Oak Ridge National Laboratory (ORNL) for use in structural applications under gradient temperature conditions in an inert environment. Original characterization of Min-K was undertaken from April 1997 to July 2008 to determine its high temperature compressive strength and stress relaxation behavior up to 900 C in helium along with the formulation of a general model for the mechanical behavior exhibited by Min-K under these conditions. The additional testing described in this report was undertaken from April 2009 to June 2010 in an effort to further evaluate the mechanical behavior of Min-K when subjected to a variety of conditions including alternative test temperatures and time scales than previously measured. The behavior of Min-K under changing environments (temperature and strain), lateral loads, and additional isothermal temperatures was therefore explored.

Hemrick, James Gordon [ORNL; King, James [ORNL

2011-01-01T23:59:59.000Z

307

Ion Sources - Cyclotron  

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

Sources Sources The 88-Inch Cyclotron is fed by three Electron Cyclotron Resonance (ECR) high-charge-state ion sources, the ECR, the AECR, and VENUS, currently the most powerful ECR ion source in the world. Built to answer the demand for intense heavy ion beams, these high performance ion sources enable the 88-Inch Cyclotron to accelerate beams of ions from hydrogen to uranium. The ECR ion sources allow the efficient use of rare isotopes of stable elements, either from natural or enriched sources. A variety of metallic ion beams are routinely produced in our low temperature oven (up to 600°C) and our high temperature oven (up to 2100°C). Furthermore, the ability to produce "cocktails" (mixtures of beams) for the Berkeley Accelerator Space Effects (BASE) Facility adds tremendously to the flexibility of the 88-Inch Cyclotron.

308

Development of Substrate Structure CdTe Photovoltaic Devices with Performance Exceeding 10%: Preprint  

DOE Green Energy (OSTI)

Most work on CdTe-based solar cells has focused on devices with a superstrate structure. This focus is due to the early success of the superstrate structure in producing high-efficiency cells, problems of suitable ohmic contacts for lightly doped CdTe, and the simplicity of the structure for manufacturing. The development of the CdCl2 heat treatment boosted CdTe technology and perpetuated the use of the superstrate structure. However, despite the beneficial attributes of the superstrate structure, devices with a substrate structure are attractive both commercially and scientifically. The substrate structure eliminates the need for transparent superstrates and thus allows the use of flexible metal and possibly plastic substrates. From a scientific perspective, it allows better control in forming the junction and direct access to the junction for detailed analysis. Research on such devices has been limited. The efficiency of these devices has been limited to around 8% due to low open-circuit voltage (Voc) and fill factor. In this paper, we present our recent device development efforts at NREL on substrate-structure CdTe devices. We have found that processing parameters required to fabricate high-efficiency substrate CdTe PV devices differ from those necessary for traditional superstrate CdTe devices. We have worked on a variety of contact materials including Cu-doped ZnTe and CuxTe. We will present a comparative analysis of the performance of these contacts. In addition, we have studied the influence of fabrication parameters on junction properties. We will present an overview of our development work, which has led to CdTe devices with Voc values of more than 860 mV and NREL-confirmed efficiencies approaching 11%.

Dhere, R. G.; Duenow, J. N.; DeHart, C. M.; Li, J. V.; Kuciauskas, D.; Gessert, T. A.

2012-08-01T23:59:59.000Z

309

Low cost sprayed CdTe solar cell research. First quarterly progress report, 15 August-14 November 1979  

DOE Green Energy (OSTI)

During the first quarter of this contract, facilities for the spray pyrolysis deposition of CdTe thin films using a process anolagous to that used to spray deposit device-quality films of CdS were prepared. A Te salt, ..beta..-(CH/sub 3/)/sub 2/TeI/sub 2/, suitable for use in the spray process was synthesized. The facilities were shown to function properly by the successful spraying of good quality CdS thin films. A number of initial spray experiments were conducted utilizing the ..beta..-(CH/sub 3/)/sub 2/TeI/sub 2/ and other inorganic tellurium-bearing compounds which also show great promise in producing low-cost sprayed CdTe solar cells. Initial chemical tests of these films indicated the presence of both Cd and Te, and x-ray diffraction analysis is presently underway to determine the actual concentration of CdTe.

Sienkiewicz, P.; Lis, S.; Serreze, H.B.; Entine, G.

1979-12-01T23:59:59.000Z

310

Thin-film CdTe and CuInSe{sub 2} photovoltaic technologies  

DOE Green Energy (OSTI)

Total-area conversion efficiency of 15%--15.8% have been achieved for thin-film CdTe and CIS solar cells. Modules with power output of 5--53 W have been demonstrated by several groups world-wide. Critical processes and reaction pathways for achieving excellent PV devices have been eluciated. Research, development and technical issues have been identified, which could result in potential improvements in device and module performance. A 1-kW thin-film CdTe array has been installed and is being tested. Multimegawatt thin-film CdTe manufacturing plants are expected to be completed in 1-2 years.

Ullal, H.S.; Zweibel, K.; von Roedern, B.G.

1993-08-01T23:59:59.000Z

311

Chapter 1.19: Cadmium Telluride Photovoltaic Thin Film: CdTe  

Science Conference Proceedings (OSTI)

The chapter reviews the history, development, and present processes used to fabricate thin-film, CdTe-based photovoltaic (PV) devices. It is intended for readers who are generally familiar with the operation and material aspects of PV devices but desire a deeper understanding of the process sequences used in CdTe PV technology. The discussion identifies why certain processes may have commercial production advantages and how the various process steps can interact with each other to affect device performance and reliability. The chapter concludes with a discussion of considerations of large-area CdTe PV deployment including issues related to material availability and energy-payback time.

Gessert, T. A.

2012-01-01T23:59:59.000Z

312

Light-Induced Tellurium Enrichment on CdZnTe Crystal Surfaces Detected by Raman Spectroscopy  

Science Conference Proceedings (OSTI)

CdZnTe (CZT) crystals can be grown under controlled conditions to produce high-quality crystals to be used as room-temperature radiation detectors. Even the best crystal growth methods result in defects, such as tellurium secondary phases, that affect the crystal's performance. In this study, CZT crystals were analyzed by micro-Raman spectroscopy. The growth of Te rich areas on the surface was induced by low-power lasers. The growth was observed versus time with low-power Raman scattering and was observed immediately under higher-power conditions. The detector response was also measured after induced Te enrichment.

Hawkins, Samantha A.; Villa-Aleman, Eliel; Duff, Martine C.; Hunter, Doug B.; Burger, Arnold; Groza, Michael; Buliga, Vladimir; Black, David R. (SRNL); (NIST); (Fisk U)

2008-12-08T23:59:59.000Z

313

XPS and AES Studies of Cu/CdTe(111)-B  

DOE Green Energy (OSTI)

Copper is frequently used as a p-type dopant to improve the performance of back contacts in CdTe thin-film solar cells. In this study, surface-analysis techniques are used to probe fundamental interactions between Cu and the CdTe(111)-B surface. The results presented here were facilitated by the newly constructed surface-analysis cluster tool in the Measurements and Characterization Division at NREL; they reveal a host of fundamental phenomena that occur in the Cu/CdTe system.

Teeter, G.; Gessert, T. A.; Asher, S. E.

2005-01-01T23:59:59.000Z

314

Spectroscopy of low energy solar neutrinos using CdTe detectors  

E-Print Network (OSTI)

The usage of a large amount of CdTe(CdZnTe) semiconductor detectors for solar neutrino spectroscopy in the low energy region is investigated. Several different coincidence signals can be formed on five different isotopes to measure the Be-7 neutrino line at 862 keV in real-time. The most promising one is the usage of Cd-116 resulting in 89 SNU. The presence of Te-125 permits even the real-time detection of pp-neutrinos. A possible antineutrino flux above 713 keV might be detected by capture on Cd-106 .

K. Zuber

2002-06-19T23:59:59.000Z

315

Spectroscopy of low energy solar neutrinos using CdTe detectors  

E-Print Network (OSTI)

The usage of a large amount of CdTe(CdZnTe) semiconductor detectors for solar neutrino spectroscopy in the low energy region is investigated. Several different coincidence signals can be formed on five different isotopes to measure the Be-7 neutrino line at 862 keV in real-time. The most promising one is the usage of Cd-116 resulting in 89 SNU. The presence of Te-125 permits even the real-time detection of pp-neutrinos. A possible antineutrino flux above 713 keV might be detected by capture on Cd-106 .

Zuber, K

2003-01-01T23:59:59.000Z

316

Spallation Neutron Source, SNS  

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

Spallation Neutron Source Spallation Neutron Source Providing the most intense pulsed neutron beams in the world... Accumulator Ring Commissioning Latest Step for Spallation Neutron Source The Spallation Neutron Source, located at Oak Ridge National Laboratory, has passed another milestone on the way to completion this year--the commissioning of the proton accumulator ring. Brookhaven led the design and construction of the accumulator ring, which will allow an order of magnitude more beam power than any other facility in the world. The Spallation Neutron Source (SNS) is an accelerator-based neutron source being built in Oak Ridge, Tennessee, by the U.S. Department of Energy. The figure on the right shows a schematic of the accumulator ring and transport beam lines that are being designed and built by Brookhaven

317

Optimization of annealing conditions for controlling composition of (Pb{sub 1-x}Ge{sub x}){sub 1-{delta}}Te{sub 1+{delta}} crystals  

Science Conference Proceedings (OSTI)

One common way of controlling the composition of semiconductor materials is by two- or three-zone annealing. Compared to doping during growth, such anneals ensure more uniform distribution of impurities and better reproducibility of galvanomagnetic and photoelectric properties. For (A{sub 1{minus}x}B{sub x}){sub 1{minus}{delta}}C{sub 1+{delta}} chalcogenide solid solutions, the A/B ratio can be controlled by introducing an additional source of B or A, whereas off-stoichiometry {Delta} can be varied using a source of chalcocren C. The purpose of this work was to optimize the conditions for preparing homogeneous crystals of (Pb{sub 1{minus}}x Ge{sub x}){sub 1{minus}{delta}}Te{sub 1+{delta}} (0Te (O < x <{le}0.05). In calculations we used kinetic equations describing mass transport in the solid and vapor phases and the measured temperature dependence of the diffusion coefficient for germanium in PbTe.

Yahsina, L.V.; Bobruiko, V.B.; Zlomanov, V.P. [Moscow State Univ. (Russian Federation)] [and others

1995-10-01T23:59:59.000Z

318

Source and replica calculations  

Science Conference Proceedings (OSTI)

The starting point of the Hiroshima-Nagasaki Dose Reevaluation Program is the energy and directional distributions of the prompt neutron and gamma-ray radiation emitted from the exploding bombs. A brief introduction to the neutron source calculations is presented. The development of our current understanding of the source problem is outlined. It is recommended that adjoint calculations be used to modify source spectra to resolve the neutron discrepancy problem.

Whalen, P.P.

1994-02-01T23:59:59.000Z

319

Dynamic radioactive particle source  

SciTech Connect

A method and apparatus for providing a timed, synchronized dynamic alpha or beta particle source for testing the response of continuous air monitors (CAMs) for airborne alpha or beta emitters is provided. The method includes providing a radioactive source; placing the radioactive source inside the detection volume of a CAM; and introducing an alpha or beta-emitting isotope while the CAM is in a normal functioning mode.

Moore, Murray E.; Gauss, Adam Benjamin; Justus, Alan Lawrence

2012-06-26T23:59:59.000Z

320

MEASUREMENTS OF THE RELATIVE ABUNDANCES OF HIGH-ENERGY COSMIC-RAY NUCLEI IN THE TeV/NUCLEON REGION  

SciTech Connect

We present measurements of the relative abundances of cosmic-ray nuclei in the energy range of 500-3980 GeV/nucleon from the second flight of the Cosmic Ray Energetics And Mass balloon-borne experiment. Particle energy was determined using a sampling tungsten/scintillating-fiber calorimeter, while particle charge was identified precisely with a dual-layer silicon charge detector installed for this flight. The resulting element ratios C/O, N/O, Ne/O, Mg/O, Si/O, and Fe/O at the top of atmosphere are 0.919 {+-} 0.123{sup stat} {+-} 0.030{sup syst}, 0.076 {+-} 0.019{sup stat} {+-} 0.013{sup syst}, 0.115 {+-} 0.031{sup stat} {+-} 0.004{sup syst}, 0.153 {+-} 0.039{sup stat} {+-} 0.005{sup syst}, 0.180 {+-} 0.045{sup stat} {+-} 0.006{sup syst}, and 0.139 {+-} 0.043{sup stat} {+-} 0.005{sup syst}, respectively, which agree with measurements at lower energies. The source abundance of N/O is found to be 0.054 {+-} 0.013{sup stat} {+-} 0.009{sup syst+0.010esc} {sub -0.017}. The cosmic-ray source abundances are compared to local Galactic (LG) abundances as a function of first ionization potential and as a function of condensation temperature. At high energies the trend that the cosmic-ray source abundances at large ionization potential or low condensation temperature are suppressed compared to their LG abundances continues. Therefore, the injection mechanism must be the same at TeV/nucleon energies as at the lower energies measured by HEAO-3, CRN, and TRACER. Furthermore, the cosmic-ray source abundances are compared to a mixture of 80% solar system abundances and 20% massive stellar outflow (MSO) as a function of atomic mass. The good agreement with TIGER measurements at lower energies confirms the existence of a substantial fraction of MSO material required in the {approx}TeV per nucleon region.

Ahn, H. S.; Ganel, O.; Han, J. H.; Kim, K. C.; Lee, M. H.; Malinin, A. [Institute for Physical Science and Technology, University of Maryland, College Park, MD 20742 (United States); Allison, P. S.; Beatty, J. J.; Brandt, T. J. [Department of Physics, Ohio State University, Columbus, OH 43210 (United States); Bagliesi, M. G.; Bigongiari, G.; Maestro, P.; Marrocchesi, P. S. [Department of Physics, University of Siena and INFN, Via Roma 56, 53100 Siena (Italy); Barbier, L. [Astroparticle Physics Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States); Childers, J. T.; DuVernois, M. A. [School of Physics and Astronomy, University of Minnesota, Minneapolis, MN 55455 (United States); Conklin, N. B.; Coutu, S. [Department of Physics, Penn State University, University Park, PA 16802 (United States); Jeon, J. A.; Lee, J., E-mail: ipark@ewha.ac.k [Department of Physics, Ewha Womans University, Seoul 120-750 (Korea, Republic of)

2010-06-01T23:59:59.000Z

Note: This page contains sample records for the topic "ta te source" 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

AnthroSources  

Science Conference Proceedings (OSTI)

... placed into the HANIM format (www.hanim.org) and existing animation sequences are applied. The original source of the animations comes from ...

322

Locating Sources of Data  

Science Conference Proceedings (OSTI)

Table 4   Guides and directories to sources of materials data and information...1993 The CD-ROM Directory 1993, TFPL Publishing, Washington, DC, 1993.

323

Brochures | Advanced Photon Source  

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

Podcasts Image Gallery external site Video Library Syndicated Feeds (RSS) The Advanced Photon Source: Lighting the Way to a Better Tomorrow aps brochure The APS helps...

324

Publications | Advanced Photon Source  

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

compendium of information on results from research at the APS. It is the official source for listing APS-related journal articles, conference proceedings and papers,...

325

Divisions | Advanced Photon Source  

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

Chart Argonne Research Divisions APS Research Divisions In May 2002, The Advanced Photon Source was reorganized into three divisions: the Accelerator Systems Division...

326

Sources of Corrosion Information  

Science Conference Proceedings (OSTI)

Table 3   Sources of corrosion information...Sci.chem.electrochem Newsgroup www.groups.google.com/groups?group=sci.chem..electrochem/...

327

Improved ion source  

DOE Patents (OSTI)

A magnetic filter for an ion source reduces the production of undesired ion species and improves the ion beam quality. High-energy ionizing electrons are confined by the magnetic filter to an ion source region, where the high-energy electrons ionize gas molecules. One embodiment of the magnetic filter uses permanent magnets oriented to establish a magnetic field transverse to the direction of travel of ions from the ion source region to the ion extraction region. In another embodiment, low energy 16 eV electrons are injected into the ion source to dissociate gas molecules and undesired ion species into desired ion species,

Leung, K.N.; Ehlers, K.W.

1982-05-04T23:59:59.000Z

328

A very promising piezoelectric property of Ta{sub 2}O{sub 5} thin films. I: Monoclinic-trigonal phase transition  

Science Conference Proceedings (OSTI)

Ceramic thin films of tantalum oxide of a new trigonal structure (a=12.713(7) A, {alpha}=28.201(0){sup o}, space-group R3) were produced by thermal treatments of amorphous deposits on (001)Si wafers, either by electrostatic spray deposition or by injection metal-organic chemical vapor decomposition. This trigonal phase comes from the transformation of a monoclinic phase 11L- or 25L-Ta{sub 2}O{sub 5}. The transformation is reversible under oxygen atmosphere and, from results of TEM investigations, occurs mainly via atomic motions along the z unique axis of the monoclinic structure parallel to the polar three-fold axis of the trigonal structure. The non-centrosymmetry and direction of polar axis of the trigonal phase, identified by high resolution TEM imaging, indicate a possibility of very high electric dipole moments linked to a strong piezoelectricity. From results of XPS analyses of both monoclinic and trigonal structures, the binding energies remain similar to those of Ta{sub 2}O{sub 5}. As the formation of the trigonal structure gives rise to an important volume expansion, stresses induced in ceramic thin films are likely influencing both properties of birefringence and piezoelectricity which are presented in a separated article (part II). It is mentioned that the formation of trigonal phase does not occur in bulk Ta{sub 2}O{sub 5} samples, for which an incommensurate phase transition has been observed in a previous work. - Graphical abstract: (a) {theta}/2{theta} X-ray pattern of the tantalum oxide layer prepared by i-MOCVD, cooled down at 5 deg. C min{sup -1} after a thermal treatment at 850 deg. C under N{sub 2} for 1 h. (b) Rhombohedral cell of the Ta{sub 2}O{sub 5} trigonal structure of R3 space-group decorated with its 10 Ta sites. Highlights: > We examine crystallographic properties of a new Ta{sub 2}O{sub 5} trigonal phase. > Its formation occurs only in thin films. > It comes from a reversible transition with a monoclinic phase. > A possibility of strong piezoelectricity is deduced from the present study.

Audier, M., E-mail: Marc.Audier@grenoble-inp.fr [Laboratoire des Materiaux et du Genie Physique, UMR CNRS 5628, Minatec - INP Grenoble, 3 parvis Louis Neel, BP 257, 38016 Grenoble Cedex 1 (France); Chenevier, B.; Roussel, H. [Laboratoire des Materiaux et du Genie Physique, UMR CNRS 5628, Minatec - INP Grenoble, 3 parvis Louis Neel, BP 257, 38016 Grenoble Cedex 1 (France); Vincent, L. [CIME Nanotech Minatec, Microsystemes et capteurs, F-38016 Grenoble Cedex 1 (France); Pena, A. [Institut Neel - CNRS/UJF, Dpt. Matiere Condensee, Materiaux et Fonctions, F-38042 Grenoble (France); Lintanf Salauen, A. [L2MA, CEA LETI D2NT, F-38054 Grenoble (France)

2011-08-15T23:59:59.000Z

329

Cd1-xMnxTe semimagnetic semiconductors for ultrafast spintronics and magnetooptics  

Science Conference Proceedings (OSTI)

We present ultrafast optical characterization of Cd1-xMnxTe single crystals with high (x>0.5-Mn) concentration, studied by magnetooptical sampling and time-resolved magnetization modulation spectroscopy. We have demonstrated that ...

R. Rey-de-Castro; Daozhi Wang; A. Verevkin; A. Mycielski; R. Sobolewski

2005-01-01T23:59:59.000Z

330

Glass-like thermal transport in AgSbTe2 | ORNL  

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

Glass-like thermal transport in AgSbTe2: nano-scale insights to improve thermoelectric efficiency May 16, 2013 Inelastic neutron scattering data showing the phonon dispersions...

331

Appendix B: CArBon dioxide CApture teChnology SheetS  

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

teChnology uPDate, may 2013 eleCtroChemiCal membrane for Carbon DioxiDe CaPture & Power generation primary project goals FuelCell Energy, Inc. (FCE) is developing an...

332

Z' Bosons, the NuTeV Anomaly, and the Higgs Boson Mass  

E-Print Network (OSTI)

NuTeV Anomaly, and the Higgs Boson Mass Michael S. Chanowitzpredicted value of the Higgs boson mass, from ? 60 to ? 120from an increase in the Higgs boson mass. There is a vast

Chanowitz, Michael S

2009-01-01T23:59:59.000Z

333

Processing Effects on Junction Interdiffusion in CdS/CdTe Polycrystalline Devices  

DOE Green Energy (OSTI)

The performance of CdS/CdTe solar cells is strongly impacted by the process used to grow the CdS layer. CdS films grown by chemical-bath deposition (CBD) exhibit lower sublimation (CSS).

Albin, D.; Yan, Y.; King, D.; Moutinho, H.; Jones, K.; Matson, R.; Al-Jassim, M.

2000-01-01T23:59:59.000Z

334

ZB/WZ Band Offsets and Carrier Localization in CdTe Solar Cells  

DOE Green Energy (OSTI)

Using the first principles band-structure method, we studied systematically the stability and electronic structure of CdX (X=S, Se, and Te) semiconductors with the zinc-blende (ZB) and wurtzite (WZ) crystal structures.

Wei, S.-H.; Zhang, S. B.

2000-01-01T23:59:59.000Z

335

Mechanical properties of highly oriented FeSe0.5Te0.5 superconductor  

Science Conference Proceedings (OSTI)

We have synthesized highly oriented samples of the superconducting compound FeSe0.5Te0.5 and investigated its mechanical properties. These samples were characterized by scanning electron microscopy(SEM) with energy-dispersive analysis

Jorge Luiz Pimentel Júnior; Paulo Pureur; Cristiano Santos Lopes; Francisco Carlos Serbena; Carlos Eugênio Foerster; Simone Aparecida da Silva; Alcione Roberto Jurelo; Adilson Luiz Chinelatto

2012-01-01T23:59:59.000Z

336

Characterization of CdTe Nanoparticles Fabricated by Pulsed Electron Deposition Technique at Different Ablation Parameters  

Science Conference Proceedings (OSTI)

Telluride (CdTe) is a front-runner photovoltaic (PV) material because it has already attained efficiencies above 16%. The fabrication of CdTe nanoparticles has aroused considerable interest because of their potential application as active layer in organic/inorganic hybrid solar cells. They can also be used for sensitisation of wide band gap semiconductors. In this work, we explore pulsed electron beam deposition (PED) technique to fabricate CdTe nanoparticles. Two ablation parameters, namely background gas pressure and electron energy were varied to investigate their effects on the nanoparticle formation. AFM and optical transmission measurements indicate that we have fabricated CdTe nanocrystalline films exhibiting quantum confinement effect. These films contain scattered nanoparticles with diameters varying from 40 nm to 500 nm, which contribute to the optical absorption near the bulk bandgap energy. However, increasing the background pressure to 19 mTorr improves the nanocrystalline film uniformity.

Jackson, E.; Aga, R. Jr.; Steigerwald, A.; Ueda, A.; Pan, Z.; Collins, W. E.; Mu, R. [Department of Physics, Fisk University, 1000 17th Ave N, Nashville TN 37208 (United States)

2008-03-13T23:59:59.000Z

337

Low-cost CdZnTe devices for cascade cell application  

DOE Green Energy (OSTI)

This report describes a research program to develop a low-cost technique for producing Cd{sub 1-x}Zn{sub x}Te devices for cascade solar cell applications. The technique involves a two-stage process for fabricating such devices with a band gap of about 1.7 eV and a transparent contact layer of low-resistivity ZnTe. In the first stage, thin films of Cd, Zn, and Te are deposited in stacked layers as Cd{sub 1-x}An{sub x}Te. The second stage involves hearing and reacting the layers to form the compound. At first, electrodeposition was used for depositing the layers to successfully fabricate Dc{sub 1-x}Zn{sub x}Te thin-film devices. These films were also intrinsically doped with copper. For the first time, transparent ZnTe films of low resistivity were obtained in a two-stage process; preliminary solar cells using films with low Zn content were demonstrated. A second phase of the project involved growing films with higher Zn content (>15%). Such films were grown on CdS-coated substrates for fabricating devices. The effects of the solar-cell processing steps on the Cd{sub 1-x}Zn{sub x}Te and CdS/Cd{sub 1-x}Zn{sub x}Te interfaces were studied; results showed that the nature of the interface depended on the stoichiometry of the Cd{sub 1-x}Zn{sub x}Te thin film. A sharp interface was observed for the CdS/CdTe structures, but the interface became highly diffused as the Zn content in the absorber layer increased above 15%. The interaction between the CdS window layer and the Cd{sub 1-x}Zn{sub x}Te absorber layer was found to result from an exchange reaction between Zn in the absorber layer and the thin CdS film. 14 refs., 10 figs.

Basol, B.M.; Kapur, V.K. (International Solar Electric Technology, Inglewood, CA (USA))

1990-11-01T23:59:59.000Z

338

Radiation Source Replacement Workshop  

Science Conference Proceedings (OSTI)

This report summarizes a Radiation Source Replacement Workshop in Houston Texas on October 27-28, 2010, which provided a forum for industry and researchers to exchange information and to discuss the issues relating to replacement of AmBe, and potentially other isotope sources used in well logging.

Griffin, Jeffrey W.; Moran, Traci L.; Bond, Leonard J.

2010-12-01T23:59:59.000Z

339

PORTABLE SOURCE OF RADIOACTIVITY  

DOE Patents (OSTI)

A portable source for radiogiaphy or radiotherapy is described. It consists of a Tl/sup 170/ or Co/sup 60/ source mounted in a rotatable tungsten alloy plug. The plug rotates within a brass body to positions of safety or exposure. Provision is made for reloading and carrying the device safely. (T.R.H.)

Goertz, R.C.; Ferguson, K.R.; Rylander, E.W.; Safranski, L.M.

1959-06-16T23:59:59.000Z

340

Chemical Plume Source Localization  

Science Conference Proceedings (OSTI)

This paper addresses the problem of estimating a likelihood map for the location of the source of a chemical plume using an autonomous vehicle as a sensor probe in a fluid flow. The fluid flow is assumed to have a high Reynolds number. Therefore, the ... Keywords: Autonomous vehicles, Bayesian inference methods, chemical plume tracing, online mapping, online planning, plume source localization

Shuo Pang; J. A. Farrell

2006-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "ta te source" 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

Deformation and shape transitions in hot rotating neutron deficient Te isotopes  

SciTech Connect

Evolution of the nuclear shapes and deformations under the influence of temperature and rotation is investigated in Te isotopes with neutron number ranging from the proton drip line to the stability valley. Spin dependent critical temperatures for the shape transitions in Te nuclei are computed. Shape transitions from prolate at low temperature and spin to oblate via triaxiality are seen with increasing neutron number and spin.

Aggarwal, Mamta [UM-DAE Centre for Excellence in Basic Sciences, University of Mumbai, Kalina Campus, Mumbai 400 098 (India); Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400 005 (India); Mazumdar, I. [Tata Institute of Fundamental Research, Homi Bhabha Road, Colaba, Mumbai 400 005 (India)

2009-08-15T23:59:59.000Z

342

Waste-form development for conversion to portland cement at Los Alamos National Laboratory (LANL) Technical Area 55 (TA-55)  

Science Conference Proceedings (OSTI)

The process used at TA-55 to cement transuranic (TRU) waste has experienced several problems with the gypsum-based cement currently being used. Specifically, the waste form could not reliably pass the Waste Isolation Pilot Plant (WIPP) prohibition for free liquid and the Environmental Protection Agency (EPA)-Toxicity Characteristic Leaching Procedure (TCLP) standard for chromium. This report describes the project to develop a portland cement-based waste form that ensures compliance to these standards, as well as other performance standards consisting of homogeneous mixing, moderate hydration temperature, timely initial set, and structural durability. Testing was conducted using the two most common waste streams requiring cementation as of February 1994, lean residue (LR)- and oxalate filtrate (OX)-based evaporator bottoms (EV). A formulation with a pH of 10.3 to 12.1 and a minimum cement-to-liquid (C/L) ratio of 0.80 kg/l for OX-based EV and 0.94 kg/L for LR-based EV was found to pass the performance standards chosen for this project. The implementation of the portland process should result in a yearly cost savings for raw materials of approximately $27,000 over the gypsum process.

Veazey, G.W.; Schake, A.R.; Shalek, P.D.; Romero, D.A.; Smith, C.A.

1996-10-01T23:59:59.000Z

343

source | OpenEI  

Open Energy Info (EERE)

source source Dataset Summary Description This dataset comes from the Energy Information Administration (EIA), and is part of the 2011 Annual Energy Outlook Report (AEO2011). This dataset is table 17, and contains only the reference case. The dataset uses quadrillion Btu. The data is broken down into marketed renewable energy, residential, commercial, industrial, transportation and electric power. Source EIA Date Released April 26th, 2011 (3 years ago) Date Updated Unknown Keywords Commercial Electric Power Industrial Renewable Energy Consumption Residential sector source transportation Data application/vnd.ms-excel icon AEO2011: Renewable Energy Consumption by Sector and Source- Reference Case (xls, 105 KiB) Quality Metrics Level of Review Peer Reviewed Comment

344

Photonic crystal light source  

DOE Patents (OSTI)

A light source is provided by a photonic crystal having an enhanced photonic density-of-states over a band of frequencies and wherein at least one of the dielectric materials of the photonic crystal has a complex dielectric constant, thereby producing enhanced light emission at the band of frequencies when the photonic crystal is heated. The dielectric material can be a metal, such as tungsten. The spectral properties of the light source can be easily tuned by modification of the photonic crystal structure and materials. The photonic crystal light source can be heated electrically or other heating means. The light source can further include additional photonic crystals that exhibit enhanced light emission at a different band of frequencies to provide for color mixing. The photonic crystal light source may have applications in optical telecommunications, information displays, energy conversion, sensors, and other optical applications.

Fleming, James G. (Albuquerque, NM); Lin, Shawn-Yu (Albuquerque, NM); Bur, James A. (Corrales, NM)

2004-07-27T23:59:59.000Z

345

Neutron sources and applications  

Science Conference Proceedings (OSTI)

Review of Neutron Sources and Applications was held at Oak Brook, Illinois, during September 8--10, 1992. This review involved some 70 national and international experts in different areas of neutron research, sources, and applications. Separate working groups were asked to (1) review the current status of advanced research reactors and spallation sources; and (2) provide an update on scientific, technological, and medical applications, including neutron scattering research in a number of disciplines, isotope production, materials irradiation, and other important uses of neutron sources such as materials analysis and fundamental neutron physics. This report summarizes the findings and conclusions of the different working groups involved in the review, and contains some of the best current expertise on neutron sources and applications.

Price, D.L. [ed.] [Argonne National Lab., IL (United States); Rush, J.J. [ed.] [National Inst. of Standards and Technology, Gaithersburg, MD (United States)

1994-01-01T23:59:59.000Z

346

Preparation and properties of evaporated CdTe films compared with single crystal CdTe. Progress report No. 4, August 1-October 31, 1981  

DOE Green Energy (OSTI)

The hot-wall vacuum evaporation system is nearly complete and the first films are expected in early December. CdTe homojunction cells were theoretically modelled and to some extent tested experimentally using the n-type CdTe film on p-type CdTe crystal homojunction cells previously deposited at Linz. Modelling emphasizes the known importance of surface recombination velocity for such homojunction cells. The n-type layer on the experimental cell was thinned by etching from 5 micrometers to 1.5 micrometers, with a corresponding increase in short-circuit current from 0.1 to 1 mA/cm/sup 2/. This behavior is as theoretically expected; to obtain a short-circuit current of 11 mA/cm/sup 2/, as required for a 10% cell, requires a thickness of about 0.2 micrometers for a surface recombination velocity of 10/sup 6/ cm/sec and other realistic cell parameters. By doping experiments on single crystal CdTe, it has been shown that the hole density does decrease when the P dopant density is decreased below a critical value in CdTe:P crystals, thus eliminating the possibility that the major acceptors in the P-doped crystals were not P impurity. Attempts to heavily dope CdTe with As were less successful, but this may be due to the use of elemental As as the dopant in this case rather than a compound of the dopant. Cs was shown to be an effective dopant of CdTe and resistivities as low as 0.3 ohm-cm corresponding to hole densities in the low 10/sup 17/ cm/sup -3/ range were obtained. An apparent correlation between the low-temperature barrier height associated with a grain boundary in CdTe and the angle of mismatch between the two grains has been observed. Improved capacitance of grain boundary measurements should yield defect densities.

Bube, R H

347

Li6La3SnMO12 (M = Sb, Nb, Ta), a Family of Lithium Garnets with High Li-Ion Conductivity  

Science Conference Proceedings (OSTI)

In order to investigate the influence of covalent bonding within the garnet framework on the conductivity of Li+ in the interstitial space, the Li+ conductivities in the family of Sn-based compounds Li6La3 SnMO12 (M = Sb, Nb, Ta) have been obtained and are compared with those of Li6La3ZrMO12. Refinement of the neutron diffraction pattern of Li6La3 SnNbO12shows that the interstitial tetrahedral sites (24d ) are about half-occupied and most of the Li in the interstitial bridging octahedral sites are displaced from the center position (48g ). The Sb-based compound has the largest lattice parameter while the Ta-based compound has the highest Li+-ion conductivity of 0.42 10 4 Scm 1.

Bridges, Craig A [ORNL; Goodenough, J. B. [University of Texas, Austin; Gupta, Dr Asha [University of Texas, Austin; Nakanishi, Masahiro [ORNL; Paranthaman, Mariappan Parans [ORNL; Sokolov, Alexei P [ORNL; Bi, Zhonghe [ORNL; Li, Yutao [University of Texas, Austin; Han, Jiantao [University of Texas, Austin; Dong, Youzhong [South China University of Technology, Guangzhou, PR China; Wang, Long [University of Texas, Austin; Xu, Maowen [University of Texas, Austin

2012-01-01T23:59:59.000Z

348

Valence Band Structure of Highly Efficient p-type Thermoelectric PbTe-PbS Alloys  

Science Conference Proceedings (OSTI)

New experimental evidence is given relevant to the temperature-dependence of valence band structure of PbTe and PbTe1-xSx alloys (0.04 x 0.12), and its effect on the thermoelectric figure of merit zT. The x = 0.08 sample has zT ~ 1.55 at 773K. The magnetic field dependence of the high-temperature Hall resistivity of heavily p-type (> 1019 cm-3) Na-doped PbTe1-xSx reveals the presence of high-mobility electrons. This put in question prior analyses of the Hall coefficient and the conclusion that PbTe would be an indirect gap semiconductor at temperatures where its zT is optimal. Possible origins for these electrons are discussed: they can be induced by photoconductivity, or by the topology of the Fermi surface when the L and -bands merge. Negative values for the low-temperature thermopower are also observed. Our data show that PbTe continues to be a direct gap semiconductor at temperatures where the zT and S2 of p-type PbTe are optimal e.g. 700-900K. The previously suggested temperature induced rapid rise in energy of the heavy hole LVB relative to the light hole UVB is not supported by the experimental data.

Jaworski, C. M. [Ohio State University; Nielsen, Mechele [Ohio State University; Wang, Hsin [ORNL; Girard, Steven N. [Northwestern University, Evanston; Cai, Wei [ORNL; Porter, Wallace D [ORNL; Kanatzidis, Mercouri G. [Northwestern University, Evanston; Heremans, J. P. [Ohio State University

2013-01-01T23:59:59.000Z

349

Can TeVeS avoid Dark Matter on galactic scales?  

E-Print Network (OSTI)

A fully relativistic analysis of gravitational lensing in TeVeS is presented. By estimating the lensing masses for a set of six lenses from the CASTLES database, and then comparing them to the stellar mass, the deficit between the two is obtained and analysed. Considering a parametrised range for the TeVeS function $mu(y)$, which controls the strength of the modification to gravity, it is found that on galactic scales TeVeS requires additional dark matter with the commonly used $mu(y)$. A soft dependence of the results on the cosmological framework and the TeVeS free parameters is discussed. For one particular form of $mu(y)$, TeVeS is found to require very little dark matter. This choice is however ruled out by rotation curve data. The inability to simultaneously fit lensing and rotation curves for a single form of $mu(y)$ is a challenge to a "no dark matter" TeVeS proposal.

Nick E. Mavromatos; Mairi Sakellariadou; Muhammad Furqaan Yusaf

2009-01-25T23:59:59.000Z

350

Oxygen Incorporation During Fabrication of Substrate CdTe Photovoltaic Devices: Preprint  

DOE Green Energy (OSTI)

Recently, CdTe photovoltaic (PV) devices fabricated in the nonstandard substrate configuration have attracted increasing interest because of their potential compatibility with flexible substrates such as metal foils and polymer films. This compatibility could lead to the suitability of CdTe for roll-to-roll processing and building-integrated PV. Currently, however, the efficiencies of substrate CdTe devices reported in the literature are significantly lower ({approx}6%-8%) than those of high-performance superstrate devices ({approx}17%) because of significantly lower open-circuit voltage (Voc) and fill factor (FF). In our recent device development efforts, we have found that processing parameters required to fabricate high-efficiency substrate CdTe PV devices differ from those necessary for traditional superstrate CdTe devices. Here, we investigate how oxygen incorporation in the CdTe deposition, CdCl2 heat treatment, CdS deposition, and post-deposition heat treatment affect device characteristics through their effects on the junction. By adjusting whether oxygen is incorporated during these processing steps, we have achieved Voc values greater than 860 mV and efficiencies greater than 10%.

Duenow, J. N.; Dhere, R. G.; Kuciauskas, D.; Li, J. V.; Pankow, J. W.; DeHart, C. M.; Gessert, T. A.

2012-06-01T23:59:59.000Z

351

Defect Levels of Indium-doped CdMnTe Crystals  

Science Conference Proceedings (OSTI)

Using photoluminescence (PL) and current deep-level transient spectroscopy (I-DLTS), we investigated the electronic defects of indium-doped detector-grade CdMnTe:In (CMT:In) crystals grown by the vertical Bridgman method. We similarly analyzed CdZnTe:In (CZT:In) and undoped CdMnTe (CMT) crystals grown under the amount of same level of excess Te and/or indium doping level to detail the fundamental properties of the electronic defect structure more readily. Extended defects, existing in all the samples, were revealed by synchrotron white beam x-ray diffraction topography and scanning electron microscopy. The electronic structure of CMT is very similar to that of CZT, with shallow traps, A-centers, Cd vacancies, deep levels, and Te antisites. The 1.1-eV deep level, revealed by PL in earlier studies of CZT and CdTe, were attributed to dislocation-induced defects. In our I-DLTS measurements, the 1.1-eV traps showed different activation energies with applied bias voltage and an exponential dependence on the trap-filling time, which are typical characteristics of dislocation-induced defects. We propose a new defect-trap model for indium-doped CMT crystals.

K Kim; A Bolotinikov; G Camarda; R Gul; A Hossain; G Yang; Y Cui; R James

2011-12-31T23:59:59.000Z

352

Implementing waste minimization at an active plutonium processing facility: Successes and progress at technical area (TA) -55 of the Los Alamos National Laboratory  

SciTech Connect

The Los Alamos National Laboratory has ongoing national security missions that necessitate increased plutonium processing. The bulk of this activity occurs at Technical Area -55 (TA-55), the nations only operable plutonium facility. TA-55 has developed and demonstrated a number of technologies that significantly minimize waste generation in plutonium processing (supercritical CO{sub 2}, Mg(OH){sub 2} precipitation, supercritical H{sub 2}O oxidation, WAND), disposition of excess fissile materials (hydride-dehydride, electrolytic decontamination), disposition of historical waste inventories (salt distillation), and Decontamination & Decommissioning (D&D) of closed nuclear facilities (electrolytic decontamination). Furthermore, TA-55 is in the process of developing additional waste minimization technologies (molten salt oxidation, nitric acid recycle, americium extraction) that will significantly reduce ongoing waste generation rates and allow volume reduction of existing waste streams. Cost savings from reduction in waste volumes to be managed and disposed far exceed development and deployment costs in every case. Waste minimization is also important because it reduces occupational exposure to ionizing radiation, risks of transportation accidents, and transfer of burdens from current nuclear operations to future generations.

Balkey, J.J.; Robinson, M.A.; Boak, J.

1997-12-01T23:59:59.000Z

353

Preliminary plans to move the special nuclear material supporting category I and II missions from TA-18 to the device assembly facility  

SciTech Connect

In December 2002, the National Nuclear Security Agency (NNSA) issued a Record of Decision announcing its intent to relocate safeguards Category I and II missions and associated special nuclear materials (SNM) from Los Alamos National Laboratory (LANL) Technical Area 18 (TA-18) to the Device Assembly Facility (DAF) at the Nevada Test Site (NTS). The Cat I and II missions support nuclear criticality safety, nuclear emergency response, nuclear nonproliferation, and homeland security. TA-18 is the sole remaining facility in the United States with the capability to perform general-purpose nuclear materials handling experiments and training. Hands-on and remote control experiments, measurements, and training with special materials and devices are conducted. The conceptual design for modifying the DAF to house these Cat I and II missions includes plans for packaging and transporting the SNM inventory associated with the missions. This paper discusses these preliminary packaging and transporting plans, including how they fit into the plans for transitioning the relevant TA- 18 missions to DAF while ensuring that mission, cost, and schedule requirements are met.

Haag, William Earl; Nicholas, N. J. (Nancy J.); Mann, P. (Paul)

2004-01-01T23:59:59.000Z

354

Microfabricated diffusion source  

DOE Patents (OSTI)

A microfabricated diffusion source to provide for a controlled diffusion rate of a vapor comprises a porous reservoir formed in a substrate that can be filled with a liquid, a headspace cavity for evaporation of the vapor therein, a diffusion channel to provide a controlled diffusion of the vapor, and an outlet to release the vapor into a gas stream. The microfabricated diffusion source can provide a calibration standard for a microanalytical system. The microanalytical system with an integral diffusion source can be fabricated with microelectromechanical systems technologies.

Oborny, Michael C. (Albuquerque, NM); Frye-Mason, Gregory C. (Cedar Crest, NM); Manginell, Ronald P. (Albuquerque, NM)

2008-07-15T23:59:59.000Z

355

Alternative fuel information sources  

DOE Green Energy (OSTI)

This short document contains a list of more than 200 US sources of information (Name, address, phone number, and sometimes contact) related to the use of alternative fuels in automobiles and trucks. Electric-powered cars are also included.

Not Available

1994-06-01T23:59:59.000Z

356

National Synchrotron Light Source  

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

Environmental Assessment Environmental Assessment Proposed Upgrade and Improvement of the National Synchrotron Light Source Complex at Brookhaven National Laboratory, Upton, New York This Environmental Assessment addresses the proposed action by the U.S. Department of Energy to upgrade the facilities of the National Synchrotron Light Source Complex, namely the National Synchrotron Light Source (NSLS), the Accelerator Test Facility and the Source Development Laboratory. The environmental effects of a No-Action Alternative as well as a Proposed Action are evaluated in the Environmental Assessment. The “NSLS Environmental Assessment Fact Sheet” link below leads to a one-page summary of the Environmental Assessment. The “NSLS Environmental Assessment” link below leads to the whole 41-page

357

Source Remediation vs. Plume  

E-Print Network (OSTI)

This summary paper reviews just some of the extensive scientific literature from the past 20 years on the various aspects of contaminant source remediation and plume management. Some of the major findings of the numerous research projects are presented.

Management Critical Factors; G. Teutsch; H. Rgner; D. Zamfirescu; M. Finkel; M. Bittens

2001-01-01T23:59:59.000Z

358

Sources of Error  

Science Conference Proceedings (OSTI)

...Sources of error in damage tolerance analysis can be classified as: Uncertainty and assumptions in data input Uncertainty due to assumptions about flaws Interpretations of, and assumptions in, stress history Inaccuracies in stress intensity Computer...

359

About | Advanced Photon Source  

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

the APS Welcome to the Advanced Photon Source Here you will find an introduction and tour of the facility, as well as information about the organizations and opportunities at...

360

Specific Sources of Data  

Science Conference Proceedings (OSTI)

Table 5   Sources of materials data...ASM International, 1989, 1224 pp (C) NIST High Temperature Superconductors Database, Ceramics Division, National Institute of Standards and Technology, Gaithersburg,

Note: This page contains sample records for the topic "ta te source" 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.


361

Bayesian Radiation Source Localization  

Science Conference Proceedings (OSTI)

Locating illicit radiological sources using gamma ray or neutron detection is a key challenge for both homeland security and nuclear nonproliferation. Localization methods using an array of detectors or a sequence of observations in time and space must provide rapid results while accounting for a dynamic attenuating environment. In the presence of significant attenuation and scatter, more extensive numerical transport calculations in place of the standard analytical approximations may be required to achieve accurate results. Numerical adjoints based on deterministic transport codes provide relatively efficient detector response calculations needed to determine the most likely location of a true source. Probabilistic representations account for uncertainty in the source location resulting from uncertainties in detector responses, the approximations that are used, and the potential for nonunique solutions. A Bayesian approach improves on previous likelihood methods for source localization by allowing the incorporation of all available information to help constrain solutions.

Jarman, Kenneth D.; Miller, Erin A.; Wittman, Richard S.; Gesh, Christopher J.

2011-07-01T23:59:59.000Z

362

FROM THE P PR RE ES SO OL LI IC CI IT TA AT TI IO ON N C CO  

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

by the team of technical and management approach? Answer: The Source Evaluation Board will conduct an oral presentation session with the offeror's Key Personnel who shall...

363

Spallation Neutron Source  

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

D/gim D/gim Spallation Neutron Source SNS is an accelerator-based neutron source. This one-of-a-kind facility pro- vides the most intense pulsed neutron beams in the world. When ramped up to its full beam power of 1.4 MW, SNS will be eight times more powerful than today's best facility. It will give researchers more detailed snapshots of the smallest samples of physical and biological materials than ever before

364

Magnetron sputtering source  

DOE Patents (OSTI)

A magnetron sputtering source for sputtering coating substrates includes a high thermal conductivity electrically insulating ceramic and magnetically attached sputter target which can eliminate vacuum sealing and direct fluid cooling of the cathode assembly. The magnetron sputtering source design results in greater compactness, improved operating characteristics, greater versatility, and low fabrication cost. The design easily retrofits most sputtering apparatuses and provides for safe, easy, and cost effective target replacement, installation, and removal.

Makowiecki, Daniel M. (Livermore, WA); McKernan, Mark A. (Livermore, CA); Grabner, R. Fred (Brentwood, CA); Ramsey, Philip B. (Livermore, CA)

1994-01-01T23:59:59.000Z

365

Magnetron sputtering source  

DOE Patents (OSTI)

A magnetron sputtering source for sputtering coating substrates includes a high thermal conductivity electrically insulating ceramic and magnetically attached sputter target which can eliminate vacuum sealing and direct fluid cooling of the cathode assembly. The magnetron sputtering source design results in greater compactness, improved operating characteristics, greater versatility, and low fabrication cost. The design easily retrofits most sputtering apparatuses and provides for safe, easy, and cost effective target replacement, installation, and removal. 12 figs.

Makowiecki, D.M.; McKernan, M.A.; Grabner, R.F.; Ramsey, P.B.

1994-08-02T23:59:59.000Z

366

Field emission electron source  

DOE Patents (OSTI)

A novel field emitter material, field emission electron source, and commercially feasible fabrication method is described. The inventive field emission electron source produces reliable electron currents of up to 400 mA/cm.sup.2 at 200 volts. The emitter is robust and the current it produces is not sensitive to variability of vacuum or the distance between the emitter tip and the cathode. The novel emitter has a sharp turn-on near 100 volts.

Zettl, Alexander Karlwalter (Kensington, CA); Cohen, Marvin Lou (Berkeley, CA)

2000-01-01T23:59:59.000Z

367

HIGH VOLTAGE ION SOURCE  

DOE Patents (OSTI)

A device is described for providing a source of molecular ions having a large output current and with an accelerated energy of the order of 600 kv. Ions are produced in an ion source which is provided with a water-cooled source grid of metal to effect maximum recombination of atomic ions to molecular ions. A very high accelerating voltage is applied to withdraw and accelerate the molecular ions from the source, and means are provided for dumping the excess electrons at the lowest possible potentials. An accelerating grid is placed adjacent to the source grid and a slotted, grounded accelerating electrode is placed adjacent to the accelerating grid. A potential of about 35 kv is maintained between the source grid and accelerating grid, and a potential of about 600 kv is maintained between the accelerating grid and accelerating electrode. In order to keep at a minimum the large number of oscillating electrons which are created when such high voltages are employed in the vicinity of a strong magnetic field, a plurality of high voltage cascaded shields are employed with a conventional electron dumping system being employed between each shield so as to dump the electrons at the lowest possible potential rather than at 600 kv.

Luce, J.S.

1960-04-19T23:59:59.000Z

368

Development of a Total Energy, Environment and Asset Management (TE2AM tm) Curriculum  

Science Conference Proceedings (OSTI)

The University of Wisconsin Department of Engineering Professional Development (EPD) has completed the sponsored project entitled, Development of a Total Energy, Environment and Asset Management (TE2AM™) Curriculum. The project involved the development of a structured professional development program to improve the knowledge, skills, capabilities, and competencies of engineers and operators of commercial buildings. TE2AM™ advances a radically different approach to commercial building design, operation, maintenance, and end-­?of-­?life disposition. By employing asset management principles to the lifecycle of a commercial building, owners and occupants will realize improved building performance, reduced energy consumption and positive environmental impacts. Through our commercialization plan, we intend to offer TE2AM™ courses and certificates to the professional community and continuously improve TE2AM™ course materials. The TE2AM™ project supports the DOE Strategic Theme 1 -­? Energy Security; and will further advance the DOE Strategic Goal 1.4 Energy Productivity. Through participation in the TE2AM™ curriculum, engineers and operators of commercial buildings will be eligible for a professional certificate; denoting the completion of a prescribed series of learning activities. The project involved a comprehensive, rigorous approach to curriculum development, and accomplished the following goals: 1. Identify, analyze and prioritize key learning needs of engineers, architects and technical professionals as operators of commercial buildings. 2. Design and develop TE2AM™ curricula and instructional strategies to meet learning needs of the target learning community. 3. Establish partnerships with the sponsor and key stakeholders to enhance the development and delivery of learning programs. 4. Successfully commercialize and sustain the training and certificate programs for a substantial time following the term of the award. The project team was successful in achieving the goals and deliverables set forth in the original proposal. Though attempts were made to adhere to the original project timeline, the team requested, and was granted a 6-­?month project extension, during which time the project was completed.

None

2012-12-31T23:59:59.000Z

369

A Search for a Light Charged Higgs Boson Decaying to cs at ?s = 7 TeV.  

E-Print Network (OSTI)

??A search for a light charged Higgs boson decaying into cs is presented using data recorded in pp collisions at ?s = 7 TeV. The… (more)

Martyniuk, Alex Christopher

2011-01-01T23:59:59.000Z

370

Analysis of Alternate Methods to Obtain Stabilized Power Performance of CdTe and CIGS PV Modules (Presentation)  

DOE Green Energy (OSTI)

This presentation outlines an analysis of alternate methods to obtain stabilized power performance of CdTe and CIGS PV modules.

del Cueto, J. A.; Deline, C. A.; Rummel, S.

2011-02-01T23:59:59.000Z

371

Exploring alternative symmetry breaking mechanisms at the LHC with 7, 8 and 10 TeV total energy  

E-Print Network (OSTI)

In view of the annnouncement that in 2012 the LHC will run at 8 TeV, we study the possibility of detecting signals of alternative mechanisms of ElectroWeak Symmetry Breaking, described phenomenologically by unitarized models, at energies lower than 14 TeV. A complete calculation with six fermions in the final state is performed using the PHANTOM event generator. Our results indicate that at 8 TeV some of the scenarios with TeV scale resonances are likely to be identified while models with no resonances or with very heavy ones will be inaccessible, unless the available luminosity will be much higher than expected.

Alessandro Ballestrero; Diogo Buarque Franzosi; Ezio Maina

2012-03-13T23:59:59.000Z

372

Inter-sourcing: alternative IT sourcing solutions using student interns  

Science Conference Proceedings (OSTI)

Information Technology (IT) sourcing decisions are motivated by cost savings, skills acquisition, and staffing flexibility. The research in progress introduces a new alternative in sourcing, inter-sourcing. This practice incorporates the benefits of ... Keywords: inter-sourcing, it education, it internships, it sourcing

Mari W. Buche

2013-05-01T23:59:59.000Z

373

Experiments Involving Correlations Between CdTe Solar Cell Fabrication History and Intrinsic Device Stability  

DOE Green Energy (OSTI)

An orthogonal full-factorial design was used to study the effect of CdS and CdTe layer thickness, oxygen ambient during vapor CdCl2 (VCC) and the use of nitric-phosphoric (NP) acid as a pre-contact etch on the initial and stressed performance of CdS/CdTe small-area devices. The best initial device efficiency (using thinner CdS, thicker CdTe, no oxygen during VCC, and NP etch) also showed poor stability. Increasing the CdS thickness significantly improved stability with only a slight decrease in resulting initial performance. All devices used a thin margin of CdTe around the perimeter of the backcontact that was shown to significantly reduce catastrophic degradation and improve overall test statistics. The latter degradation is modeled by the formation of a weak-diode/low shunt resistance localized near the edge of finished devices. This shunting is believed to occur through the CdS/CdTe interface, rather than along the device edge, and is exacerbated by thinner CdS films.

Albin, D.; McMahon, T.; Berniard, T.; Pankow, J.; Demtsu, S.; Noufi, R.

2005-02-01T23:59:59.000Z

374

Investigation of the Charge Collection Efficiency of CdMnTe Radiation Detectors  

SciTech Connect

This paper presents the growth, fabrication and characterization of indium-doped cadmium manganese telluride (CdMnTe) crystals grown by the vertical Bridgman technique. The 10 x 10 x 1.9 mm{sup 3} samples have been fabricated, and the charge collection properties of the CdMnTe detectors have been measured. Alpha-particle spectroscopy measurements have yielded an average charge collection efficiency approaching 100%. Ion beam induced charge (IBIC) measurements have been performed by raster scanning focused 5.5 MeV {sup 4}He beams onto the detectors. Spatially resolved charge collection efficiency maps have been produced for a range of detector bias voltages. Inhomogeneities in the charge transport of the CdMnTe crystals have been associated with chains of Te inclusions within the detector bulk, and the reduction in charge collection efficiency in their locality has been quantified. It has been shown that the role of Te inclusions in degrading charge collection is reduced with increasing values of bias voltage. IBIC measurements for a range of low biases have highlighted the evolution of the charge collection uniformity across the detectors.

Bolotnikov A.; Rafiei, R.; Boardman, D.; Sarbutt, A.; Prokopovich, A.; Kim, K.; Reinhard, M.I.; James, R.B.

2012-06-01T23:59:59.000Z

375

A Search for TeV Gamma-Ray Burst Emission with the Milagro Observatory  

E-Print Network (OSTI)

The Milagro telescope monitors the northern sky for 100 GeV - 100 TeV transient emission through continuous very high energy wide-field observations. The large effective area and low energy threshold of Milagro allow it to detect very high energy gamma-ray burst emission with much higher sensitivity than previous instruments, and a fluence sensitivity at TeV energies comparable to dedicated gamma-ray burst satellites at keV-MeV energies. Observation of gamma-ray burst emission at TeV energies could place important constraints on gamma-ray burst progenitor and emission models. This study details the development of a weighted analysis technique; the implementation of this technique to perform a real time search for TeV transients of 40 seconds to 3 hours duration in the Milagro data; and the results from more than one year of observation. Between May 2nd, 2001, and May 22nd, 2002, no TeV transients of 40 seconds to 3 hours duration were observed. Upper limits on both observed and emitted high energy gamma-ray burst emission are presented.

Miguel F. Morales

2003-08-06T23:59:59.000Z

376

An Experiment to Locate the Site of TeV Flaring in M87  

SciTech Connect

We describe a Chandra X-ray target-of-opportunity project designed to isolate the site of TeV flaring in the radio galaxy M87. To date, we have triggered the Chandra observations only once (2010 April) and by the time of the first of our nine observations, the TeV flare had ended. However, we found that the X-ray intensity of the unresolved nucleus was at an elevated level for our first observation. Of the more than 60 Chandra observations we have made of the M87 jet covering nine years, the nucleus was measured at a comparably high level only three times. Two of these occasions can be associated with TeV flaring, and at the time of the third event, there were no TeV monitoring activities. From the rapidity of the intensity drop of the nucleus, we infer that the size of the emitting region is of order a few light days x the unknown beaming factor; comparable to the same sort of estimate for the TeV emitting region. We also find evidence of spectral evolution in the X-ray band which seems consistent with radiative losses affecting the non-thermal population of the emitting electrons within the unresolved nucleus.

Harris, D.E.; /Harvard-Smithsonian Ctr. Astrophys.; Massaro, F.; /Harvard-Smithsonian Ctr. Astrophys. /KIPAC, Menlo Park /SLAC; Cheung, C.C.; /Natl. Acad. Sci. /Naval Research Lab, Wash., D.C.; Horns, D.; Raue, M.; /Hamburg U.; Stawarz, L.; /JAXA, Sagamihara /Jagiellonian U., Astron. Observ.; Wagner, S.; /Heidelberg Observ.; Colin, P.; /Munich, Max Planck Inst.; Mazin, D.; /Barcelona, IFAE; Wagner, R.; /Munich, Max Planck Inst.; Beilicke, M.; /McDonnell Ctr. Space Sci.; LeBohec, S.; Hui, M.; /Utah U.; Mukherjee, R.; /Barnard Coll.

2012-05-18T23:59:59.000Z

377

Andromeda: A mission to determine the gamma-ray burst distance scale F.A. Harrison, W.R. Cook, T.A. Prince, S.M. Schindler  

E-Print Network (OSTI)

V emission from the galactic plane, and a search for transient emission above 100 GeV from gamma ray bursts- clei (AGN), supernova remnants and gamma-ray bursts (GRB). Gamma rays are also produced when high data will yield im- proved results. #12;3 5. Gamma-Ray Burst Search Sensitivity TeV gamma rays

Prince, Thomas A.

378

ISG8-RF Sources  

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

RF Sources - (WG3) RF Sources - (WG3) Orange Rm Yong Ho Chin, Christopher Nantista, and Sami G. Tantawi Parallel Sessions: Working Groups: WG1: Parameters, Design, Instrumentation and Tuning WG2: Damping Rings and ATF WG3: RF Sources WG4:Structures WG5: Ground Motion; Site Requirements and Investigations Monday Morning 9:00-10:30 Plenary Coffee Break 11:00-12:00 Planning Session. Monday Afternoon 13:30-15:30 High Gradient Issues (Joint with working group 4) Coffee Break 16:00-16:30 The 8-Pack Project -- D. Atkinson 16:30-17:30 High Gradient Issues and Discussions Continued. Tuesday Morning 9:30-10:30 Klystrons 9:30-10:00 Status of PPM Klystron Development for JLC -- Y. H. Chin 10:00-10:30 Design of 150MW Multi-Beam Klystron -- S. Matsumoto Coffee Break 11:00-11:30 Klystron Development at SLAC -- G. Caryotakis

379

Photon Source Parameters  

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

Photon Source Parameters Photon Source Parameters Photon Source Parameters Print Summary Graph of Brightness Curves for All Insertion Devices Insertion Device and Bend Magnet Parameters Bend Magnet Superbend Magnet U30 Undulator U50 Undulator U80 Undulator U100 Undulator W114 Wiggler The ALS has six elliptically polarizing undulators, two in straight 4, two in straight 11, and one each in straights 6 and 7. All are arranged with chicanes so that two such devices can be installed to feed two independent beamlines. They can be used in a variety of polarization modes, including circular, elliptical, horizontal, and vertical. These modes can be chosen by appropriate phasing of the magnet rows. The brightness and flux curves below are shown for horizontal and circular polarization. Curves for elliptical and vertical polarization are similar to the horizontal polarization curve, but the minimum photon energy is higher.

380

Source Emissions and Transport  

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

electron micrograph image, Lara Gundel with instrumentation electron micrograph image, Lara Gundel with instrumentation Source Emissions and Transport Investigators conduct research here to characterize and better understand the sources of airborne volatile, semi-volatile and particulate organic pollutants in the indoor environment. This research includes studies of the physical and chemical processes that govern indoor air pollutant concentrations and exposures. The motivation is to contribute to the reduction of potential human health effects. Contacts Randy Maddalena RLMaddalena@lbl.gov (510) 486-4924 Mark Mendell MJMendell@lbl.gov (510) 486-5762 Links Pollutant Sources, Dynamics and Chemistry Group Batteries and Fuel Cells Buildings Energy Efficiency Electricity Grid Energy Analysis Energy Technologies Environmental Impacts

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381

Heat Source Lire,  

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

Source Lire, Source Lire, (liayrICS-25 ) tooling Tulles (Ai 1,06:1) - 11 (31.118 Module Stack Thermoelectric Module:, (14) ltcal L/Mr r a it i lli tisli Block Mounting Interface MMRTG Design Housing (At 2219) Fin (At Go63) Thermal Insulation (Min-K & Microtherm) Space Radioisotope Power Systems Multi-Mission Radioisotope Thermoelectric Generator January 2008 What is a Multi-Mission Radioisotope Thermoelectric Generator? Space exploration missions require safe, reliable, long-lived power systems to provide electricity and heat to spacecraft and their science instruments. A uniquely capable source of power is the radioisotope thermoelectric generator (RTG) - essentially a nuclear battery that reliably converts heat into electricity. The Department of Energy and NASA are developing

382

Source Selection Guide  

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

Source Selection Source Selection Overview This chapter provides guidance to the acquisition team on conducting source selection in accordance with Part 15 of the Federal Acquisition Regulation (FAR). Background The mid 1990's was a time of significant change in many areas of procurement, particularly in the introduction of new tools and processes that help the procurement professional better meet the needs of demanding customers. The passage of the Federal Acquisition Streamlining Act in 1994 and the Federal Acquisition Reform Act in 1995 , coupled with Government-wide and Department of Energy (DOE) contract reform efforts not only changed traditional procurement processes but also changed the role of the procurement professional. No longer are procurement

383

Dual source heat pump  

DOE Patents (OSTI)

What is disclosed is a heat pump apparatus for conditioning a fluid characterized by a fluid handler and path for circulating the fluid in heat exchange relationship with a refrigerant fluid; at least two refrigerant heat exchangers, one for effecting heat exchange with the fluid and a second for effecting heat exchange between refrigerant and a heat exchange fluid and the ambient air; a compressor for efficiently compressing the refrigerant; at least one throttling valve for throttling liquid refrigerant; a refrigerant circuit; refrigerant; a source of heat exchange fluid; heat exchange fluid circulating device and heat exchange fluid circuit for circulating the heat exchange fluid in heat exchange relationship with the refrigerant; and valves or switches for selecting the heat exchangers and direction of flow of the refrigerant therethrough for selecting a particular mode of operation. The heat exchange fluid provides energy for defrosting the second heat exchanger when operating in the air source mode and also provides a alternate source of heat.

Ecker, Amir L. (Dallas, TX); Pietsch, Joseph A. (Dallas, TX)

1982-01-01T23:59:59.000Z

384

INEEL Source Water Assessment  

SciTech Connect

The Idaho National Engineering and Environmental Laboratory (INEEL) covers approximately 890 mi2 and includes 12 public water systems that must be evaluated for Source water protection purposes under the Safe Drinking Water Act. Because of its size and location, six watersheds and five aquifers could potentially affect the INEEL’s drinking water sources. Based on a preliminary evaluation of the available information, it was determined that the Big Lost River, Birch Creek, and Little Lost River Watersheds and the eastern Snake River Plain Aquifer needed to be assessed. These watersheds were delineated using the United States Geologic Survey’s Hydrological Unit scheme. Well capture zones were originally estimated using the RESSQC module of the Environmental Protection Agency’s Well Head Protection Area model, and the initial modeling assumptions and results were checked by running several scenarios using Modflow modeling. After a technical review, the resulting capture zones were expanded to account for the uncertainties associated with changing groundwater flow directions, a thick vadose zone, and other data uncertainties. Finally, all well capture zones at a given facility were merged to a single wellhead protection area at each facility. A contaminant source inventory was conducted, and the results were integrated with the well capture zones, watershed and aquifer information, and facility information using geographic information system technology to complete the INEEL’s Source Water Assessment. Of the INEEL’s 12 public water systems, three systems rated as low susceptibility (EBR-I, Main Gate, and Gun Range), and the remainder rated as moderate susceptibility. No INEEL public water system rated as high susceptibility. We are using this information to develop a source water management plan from which we will subsequently implement an INEEL-wide source water management program. The results are a very robust set of wellhead protection areas that will protect the INEEL’s public water systems yet not too conservative to inhibit the INEEL from carrying out its missions.

Sehlke, Gerald

2003-03-01T23:59:59.000Z

385

FABRICATION OF NEUTRON SOURCES  

DOE Patents (OSTI)

A method is presented for preparing a neutron source from polonium-210 and substances, such as beryllium and boron, characterized by emission of neutrons upon exposure to alpha particles from the polonium. According to the invention, a source is prepared by placing powdered beryllium and a platinum foil electroplated with polonium-2;.0 in a beryllium container. The container is sealed and then heated by induction to a temperature of 450 to 1100 deg C to volatilize the polonium off the foil into the powder. The heating step is terminated upon detection of a maximum in the neutron flux level.

Birden, J.H.

1959-04-21T23:59:59.000Z

386

Identifying PM10 Sources and Estimating Source Contributions...  

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

of ammonium nitric, secondary aerosol of ammonium sulfate, and incinerator and fuel oil burning sources. The source mass profiles derived by the PMF model well describe the...

387

Synthesis, crystal and electronic structure, and physical properties of the new lanthanum copper telluride La{sub 3}Cu{sub 5}Te{sub 7}  

SciTech Connect

The new lanthanum copper telluride La{sub 3}Cu{sub 5-x}Te{sub 7} has been obtained by annealing the elements at 1073 K. Single-crystal X-ray diffraction studies revealed that the title compound crystallizes in a new structure type, space group Pnma (no. 62) with lattice dimensions of a=8.2326(3) A, b=25.9466(9) A, c=7.3402(3) A, V=1567.9(1) A{sup 3}, Z=4 for La{sub 3}Cu{sub 4.86(4)}Te{sub 7}. The structure of La{sub 3}Cu{sub 5-x}Te{sub 7} is remarkably complex. The Cu and Te atoms build up a three-dimensional covalent network. The coordination polyhedra include trigonal LaTe{sub 6} prisms, capped trigonal LaTe{sub 7} prisms, CuTe{sub 4} tetrahedra, and CuTe{sub 3} pyramids. All Cu sites exhibit deficiencies of various extents. Electrical property measurements on a sintered pellet of La{sub 3}Cu{sub 4.86}Te{sub 7} indicate that it is a p-type semiconductor in accordance with the electronic structure calculations. -- Graphical abstract: Oligomeric unit comprising interconnected CuTe{sub 3} pyramids and CuTe{sub 4} tetrahedra. Display Omitted Research highlights: {yields} La{sub 3}Cu{sub 5-x}Te{sub 7} adopts a new structure type. {yields} All Cu sites exhibit deficiencies of various extents. {yields} The coordination polyhedra include trigonal LaTe{sub 6} prisms, capped trigonal LaTe{sub 7} prisms, CuTe{sub 4} tetrahedra and CuTe{sub 3} pyramids. {yields} La{sub 3}Cu{sub 5-x}Te{sub 7} is a p-type semiconductor.

Zelinska, Mariya; Assoud, Abdeljalil [Department of Chemistry, University of Waterloo, Waterloo, ON, Canada N2L 3G1 (Canada); Kleinke, Holger, E-mail: kleinke@uwaterloo.c [Department of Chemistry, University of Waterloo, Waterloo, ON, Canada N2L 3G1 (Canada)

2011-03-15T23:59:59.000Z

388

Innovative sputtering techniques for CIS and CdTe submodule fabrication. Annual subcontract report, 1 September 1991--31 August 1992  

DOE Green Energy (OSTI)

This report describes work done during Phase 1 of the subject subcontract. The subcontract was designed to study innovative deposition techniques, such as the rotating cylindrical magnetron sputtering system and electrodeposition for large-area, low-cost copper indium diselenide (CIS) and cadmium telluride (CdTe) devices. A key issue for photovoltaics (PV) in terrestrial and future space applications is producibility, particularly for applications using a large quantity of PV. Among the concerns for fabrication of polycrystalline thin-film PV, such as CIS and CdTe, are production volume, cost, and minimization of waste. Both rotating cylindrical magnetron (C-Mag{trademark}) sputtering and electrodeposition have tremendous potential for the fabrication of polycrystalline thin-film PV due to scaleability, efficient utilization of source materials, and inherently higher deposition rates. In the case of sputtering, the unique geometry of the C-Mae facilitates innovative cosputtering and reactive sputtering that could lead to greater throughput reduced health and safety risks, and, ultimately, lower fabrication cost. Electrodeposited films appear to be adherent and comparable with low-cost fabrication techniques. Phase I involved the initial film and device fabrication using the two techniques mentioned herein. Devices were tested by both internal facilities, as well as NREL and ISET.

Armstrong, J.M.; Misra, M.S.; Lanning, B. [Martin Marietta Aerospace, Denver, CO (United States). Astronautics Group

1993-03-01T23:59:59.000Z

389

Study of the Gamma-ray Spectrum from the Galactic Center in view of Multi-TeV Dark Matter Candidates  

E-Print Network (OSTI)

Motivated by the complex gamma-ray spectrum of the Galactic Center source now measured over five decades in energy, we revisit the issue of the role of dark matter annihilations in this interesting region. We reassess whether the emission measured by the HESS collaboration could be a signature of dark matter annihilation, and we use the {\\em Fermi} LAT spectrum to model the emission from SgrA*, using power-law spectral fits. We find that good fits are achieved by a power law with an index $\\sim 2.5-2.6$, in combination with a spectrum similar to the one observed from pulsar population and with a spectrum from a $\\gsi10$ TeV DM annihilating to a mixture of $b{\\bar b}$ and harder $\\tau^+ \\tau^-$ channels and with boost factors of the order of a hundred. Alternatively, we also consider the combination of a log-parabola fit with the DM contribution. Finally, as both the spectrum of gamma rays from the Galactic Center and the spectrum of cosmic ray electrons exhibit a cutoff at TeV energies, we study the dark matt...

Belikov, Alexander V; Silk, Joseph

2012-01-01T23:59:59.000Z

390

COMBUSTION SOURCES OF NITROGEN COMPOUNDS  

E-Print Network (OSTI)

Rasmussen, R.A. (1976). Combustion as a source of nitrousx control for stationary combustion sources. Prog. Energy,CA, March 3-4, 1977 COMBUSTION SOURCES OF NITROGEN COMPOUNDS

Brown, Nancy J.

2011-01-01T23:59:59.000Z

391

Photocatalytic splitting of water under visible-light irradiation over the NiOx-loaded Sm{sub 2}InTaO{sub 7} with 4f-d{sup 10}-d{sup 0} configuration  

SciTech Connect

A new visible-light-response photocatalyst Sm{sub 2}InTaO{sub 7} with 4f-d{sup 10}-d{sup 0} configuration crystallized in a cubic system with the space group Fd3m was synthesized by a solid-state reaction method. NiOx-loaded Sm{sub 2}InTaO{sub 7} showed high photocatalytic activities for H{sub 2} evolution from pure water under visible light irradiation (lambda>400 nm). Changes in the photocatalytic activity with the calcination temperature of Sm{sub 2}InTaO{sub 7} and the amount of NiOx loaded indicated that the combination of highly crystallized Sm{sub 2}InTaO{sub 7} and a high dispersion of NiOx particles led to high photocatalytic activity. The high photocatalytic performance of NiOx-loaded Sm{sub 2}InTaO{sub 7} supported the existing view that the photocatalytic activity correlated with the lattice distortion. Density functional theory calculation indicated that strong dispersion from the hybridized In 5s 5p orbitals at the bottom of the conduction band was responsible for the high activity of photocatalyst Sm{sub 2}InTaO{sub 7}. - Graphical abstract: A new visible-light-response photocatalyst Sm{sub 2}InTaO{sub 7} with 4f-d{sup 10}-d{sup 0} configuration was developed. DFT calculation indicated that strong dispersion from the hybridized In 5s 5p orbitals was responsible for the high photocatalytic activity.

Tang Xinde, E-mail: txd738011@yahoo.c [College of Chemistry and Chemical Engineering, Central South University, Changsha 410083 (China); Ye Hongqi [College of Chemistry and Chemical Engineering, Central South University, Changsha 410083 (China); Liu Hui [College of Chemistry and Chemical Engineering, Central South University, Changsha 410083 (China); State Key Laboratory for Powder Metallurgy, Central South University, Changsha 410083 (China); Ma Chenxia; Zhao Zhi [College of Chemistry and Chemical Engineering, Central South University, Changsha 410083 (China)

2010-01-15T23:59:59.000Z

392

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

393

Experimental study of double-{beta} decay modes using a CdZnTe detector array  

SciTech Connect

An array of sixteen 1 cm{sup 3} CdZnTe semiconductor detectors was operated at the Gran Sasso Underground Laboratory (LNGS) to further investigate the feasibility of double-{beta} decay searches with such devices. As one of the double-{beta} decay experiments with the highest granularity the 4x4 array accumulated an overall exposure of 18 kg days. The setup and performance of the array is described. Half-life limits for various double-{beta} decay modes of Cd, Zn, and Te isotopes are obtained. No signal has been found, but several limits beyond 10{sup 20} years have been performed. They are an order of magnitude better than those obtained with this technology before and comparable to most other experimental approaches for the isotopes under investigation. An improved limit for the {beta}{sup +}/EC decay of {sup 120}Te is given.

Dawson, J. V. [Laboratoire Astroparticule et Cosmologie, 10 rue Alice Domon et Leonie Duquet, F-75205 Paris (France); Goessling, C.; Koettig, T.; Muenstermann, D.; Rajek, S.; Schulz, O. [Lehrstuhl fuer Experimentelle Physik IV, Technische Universitaet Dortmund, Otto-Hahn Str. 4, D-44227 Dortmund (Germany); Janutta, B.; Zuber, K. [Institut fuer Kern- und Teilchenphysik, Technische Universitaet Dresden, Zellescher Weg 19, D-01069 Dresden (Germany); Junker, M. [Laboratori Nazionali del Gran Sasso, Assergi (Italy); Reeve, C. [University of Sussex, Falmer, Brighton BN1 9QH (United Kingdom); Wilson, J. R. [University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH (United Kingdom)

2009-08-15T23:59:59.000Z

394

Experimental Realization of a Three-Dimensional Topological Insulator, Bi 2Te3  

SciTech Connect

Three-dimensional topological insulators are a new state of quantum matter with a bulk gap and odd number of relativistic Dirac fermions on the surface. By investigating the surface state of Bi{sub 2}Te{sub 3} with angle-resolved photoemission spectroscopy, we demonstrate that the surface state consists of a single nondegenerate Dirac cone. Furthermore, with appropriate hole doping, the Fermi level can be tuned to intersect only the surface states, indicating a full energy gap for the bulk states. Our results establish that Bi{sub 2}Te{sub 3} is a simple model system for the three-dimensional topological insulator with a single Dirac cone on the surface. The large bulk gap of Bi{sub 2}Te{sub 3} also points to promising potential for high-temperature spintronics applications.

Siemons, W.

2010-02-24T23:59:59.000Z

395

Energy spectrum of charge carriers in Ag{sub 2}Te  

Science Conference Proceedings (OSTI)

On the basis of investigations of the temperature and concentration dependences of kinetic coefficients (the Hall coefficientR, the electrical conductivity {sigma}, and thermopower {alpha}{sub 0}) in n-type Ag{sub 2}Te, it is established that Ag atoms in Ag{sub 2}Te create the shallow donor levels located at a distance of (0.002-7 x 10{sup -5}T) eV from the bottom of the conduction band. It is shown that silver telluride has n-type conductivity starting with the deficiency of Ag {>=} 0.01 at % in the stoichiometric composition, and it is practically impossible to achieve the stoichiometric composition in Ag{sub 2}Te.

Aliev, F. F., E-mail: farzali@physics.ab.az; Jafarov, M. B. [Academy of Sciences of Azerbaijan, Institute of Physics (Azerbaijan)

2008-11-15T23:59:59.000Z

396

Abidjan, Côte d'Ivoire: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

Abidjan, Côte d'Ivoire: Energy Resources Abidjan, Côte d'Ivoire: Energy Resources Jump to: navigation, search Name Abidjan, Côte d'Ivoire Equivalent URI DBpedia GeoNames ID 2293538 Coordinates 5.341111°, -4.028056° 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":5.341111,"lon":-4.028056,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

397

Advances in the In-House CdTe Research Activities at NREL  

DOE Green Energy (OSTI)

NREL in-house CdTe research activities have impacted a broad range of recent program priorities. Studies aimed at industrially relevant applications have produced new materials and processes that enhance the performance of devices based on commercial materials (e.g., soda-lime glass, SnO2:F). Preliminary tests of the effectiveness of these novel components using large-scale processes have been encouraging. Similarly, electro- and nano-probe techniques have been developed and used to study the evolution and function of CdTe grain boundaries. Finally, cathodoluminescence (CL) and photoluminescence (PL) studies on single-crystal samples have yielded improved understanding of how various processes may combine to produce important defects in CdTe films.

Gessert, T.; Wu, X.; Dhere, R.; Moutinho, H.; Smith, S.; Romero, M.; Zhou, J.; Duda, A.; Corwine, C.

2005-01-01T23:59:59.000Z

398

Spiral growth of topological insulator Sb{sub 2}Te{sub 3} nanoplates  

SciTech Connect

Sb{sub 2}Te{sub 3} nanoplates synthesized by vapor phase deposition method have been systemically investigated employing atomic force microscopy, which exhibit regular spiral structures on the surface. The height of spiral steps is determined to be 1 nm corresponding to one quintuple layer, with an inter-step separation ranging from 500 nm to 1 {mu}m. Growth mechanism of spiral structures on the Sb{sub 2}Te{sub 3} nanoplate surface is elucidated, which can be applied to other layered materials with van der Waals epitaxy growth. The electrostatic properties of Sb{sub 2}Te{sub 3} nanoplates with spiral structures are also simultaneously characterized.

Hao Guolin; Qi Xiang; Fan Yinping; Xue Lin; Peng Xiangyang; Wei Xiaolin; Zhong Jianxin [Hunan Key Laboratory for Micro-Nano Energy Materials and Devices, Xiangtan University, Hunan 411105 (China) and Laboratory for Quantum Engineering and Micro-Nano Energy Technology and Faculty of Materials and Optoelectronic Physics, Xiangtan University, Hunan 411105 (China)] [Hunan Key Laboratory for Micro-Nano Energy Materials and Devices, Xiangtan University, Hunan 411105 (China) and Laboratory for Quantum Engineering and Micro-Nano Energy Technology and Faculty of Materials and Optoelectronic Physics, Xiangtan University, Hunan 411105 (China)

2013-01-07T23:59:59.000Z

399

Dark Current Transients in Thin-Film CdTe Solar Cells: Preprint  

DOE Green Energy (OSTI)

This conference paper describes the Dark current transients measured by changing the voltage bias in a stepwise fashion on CdTe cells results in minutes-long transients after each step. Transients measured at room temperature are controlled by carrier trapping that corresponds to the well known voltage transient phenomena[1]. Transients measured on the same CdTe cell at elevated temperature (60C and 90C) show a much slower decay process. We associate this physical process with''shunt'' current paths induced with reverse bias and removed with forward bias. A different back contact process may produce an opposite voltage dependence. The lack of these transients may be required for the fabrication of ''stable'' thin-film CdTe solar cells.

McMahon, T. J.

2002-05-01T23:59:59.000Z

400

Z' Bosons, the NuTeV Anomaly, and the Higgs Boson Mass  

SciTech Connect

Fits to the precision electroweak data that include the NuTeV measurement are considered in family universal, anomaly free U(1) extensions of the Standard Model. In data sets from which the hadronic asymmetries are excluded, some of the Z{prime} models can double the predicted value of the Higgs boson mass, from {approx} 60 to {approx} 120 GeV, removing the tension with the LEP II lower bound, while also modestly improving the {chi}{sup 2} confidence level. The effect of the Z{prime} models on both m{sub H} and the {chi}{sup 2} confidence level is increased when the NuTeV measurement is included in the fit. Both the original NuTeV data and a revised estimate by the PDG are considered.

Chanowitz, Michael S

2009-03-03T23:59:59.000Z

Note: This page contains sample records for the topic "ta te source" 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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401

Selective ion source  

DOE Patents (OSTI)

A ion source is described wherein selected ions maybe extracted to the exclusion of unwanted ion species of higher ionization potential. Also described is a method of producing selected ions from a compound, such as P.sup.+ from PH.sub.3. The invention comprises a plasma chamber, an electron source, a means for introducing a gas to be ionized by electrons from the electron source, means for limiting electron energy from the electron source to a value between the ionization energy of the selected ion species and the greater ionization energy of an unwanted ion specie, and means for extracting the target ion specie from the plasma chamber. In one embodiment, the electrons are generated in a plasma cathode chamber immediately adjacent to the plasma chamber. A small extractor draws the electrons from the plasma cathode chamber into the relatively positive plasma chamber. The energy of the electrons extracted in this manner is easily controlled. The invention is particularly useful for doping silicon with P.sup.+, AS.sup.+, and B.sup.+ without the problematic presence of hydrogen, helium, water, or carbon oxide ions. Doped silicon is important for manufacture of semiconductors and semiconductor devices.

Leung, Ka-Ngo (Hercules, CA)

1996-01-01T23:59:59.000Z

402

The effects of shockwave profile shape and shock obliquity on spallation in Cu and Ta: kinetic and stress-state effects on damage evolution(u)  

SciTech Connect

Widespread research over the past five decades has provided a wealth of experimental data and insight concerning shock hardening and the spallation response of materials subjected to square-topped shock-wave loading profiles. Less quantitative data have been gathered on the effect of direct, in-contact, high explosive (HE)-driven Taylor wave (or triangular-wave) loading profile shock loading on the shock hardening, damage evolution, or spallation response of materials. Explosive loading induces an impulse dubbed a 'Taylor Wave'. This is a significantly different loading history than that achieved by a square-topped impulse in terms of both the pulse duration at a fixed peak pressure, and a different unloading strain rate from the peak Hugoniot state achieved. The goal of this research is to quantify the influence of shockwave obliquity on the spallation response of copper and tantalum by subjecting plates of each material to HE-driven sweeping detonation-wave loading and quantify both the wave propagation and the post-mortem damage evolution. This talk will summarize our current understanding of damage evolution during sweeping detonation-wave spallation loading in Cu and Ta and show comparisons to modeling simulations. The spallation responses of Cu and Ta are both shown to be critically dependent on the shockwave profile and the stress-state of the shock. Based on variations in the specifics of the shock drive (pulse shape, peak stress, shock obliquity) and sample geometry in Cu and Ta, 'spall strength' varies by over a factor of two and the details of the mechanisms of the damage evolution is seen to vary. Simplistic models of spallation, such as P{sub min} based on 1-D square-top shock data lack the physics to capture the influence of kinetics on damage evolution such as that operative during sweeping detonation loading. Such considerations are important for the development of predictive models of damage evolution and spallation in metals and alloys.

Gray, George T [Los Alamos National Laboratory

2010-12-14T23:59:59.000Z

403

Strategic Sourcing | Department of Energy  

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

Strategic Sourcing Strategic Sourcing Strategic Sourcing Energy Wide Strategic Sourcing (EWSS) DOE leadership has recognized that benefits could be achieved at the federal level through an organized, systematic and collaborative approach to acquiring commonly used goods and services. The DOE strategic sourcing program builds upon historical accomplishments as well as establishes a more cohesive and disciplined program, consistent with OMB's direction, for the conduct of DOE future strategic sourcing efforts. The DOE and NNSA Senior Procurement Executives have created a strategic sourcing capability and organizational components to identify federal strategic sourcing opportunities and coordinate strategic thinking. To date, this program has identified a number of opportunities; particularly in the areas of

404

Book sources | Open Energy Information  

Open Energy Info (EERE)

Community Linked Data Special page Share this page on Facebook icon Twitter icon Book sources Jump to: navigation, search Search for book sources ISBN: Go Retrieved from...

405

Book sources | Open Energy Information  

Open Energy Info (EERE)

Community Linked Data Special page Share this page on Facebook icon Twitter icon Book sources Jump to: navigation, search Search for book sources ISBN: 9781603580304 Go...

406

WIPP Opportunities - Procurement - Sources Sought  

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

Procurement Sources Sought This page displays a listing Sources Sought. If you are interested in submitting an outline, please contact the cognizant buyer to find out more. Please...

407

Energy Sources | Department of Energy  

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

Sources Energy Sources Renewable Energy Learn more about Solar, Water, Biomass, Geothermal and Wind Energy. Read more Nuclear Learn more about how we use Nuclear Energy. Read more...

408

Energy Sources | Department of Energy  

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

Science & Innovation Energy Sources Energy Sources Renewable Energy Learn more about Solar, Water, Biomass, Geothermal and Wind Energy. Read more Nuclear Learn more about how we...

409

High efficiency thin film CdTe and a-Si based solar cells  

DOE Green Energy (OSTI)

This report describes work done by the University of Toledo during the first year of this subcontract. During this time, the CdTe group constructed a second dual magnetron sputter deposition facility; optimized reactive sputtering for ZnTe:N films to achieve 10 ohm-cm resistivity and {approximately}9% efficiency cells with a copper-free ZnTe:N/Ni contact; identified Cu-related photoluminescence features and studied their correlation with cell performance including their dependence on temperature and E-fields; studied band-tail absorption in CdS{sub x}Te{sub 1{minus}x} films at 10 K and 300 K; collaborated with the National CdTe PV Team on (1) studies of high-resistivity tin oxide (HRT) layers from ITN Energy Systems, (2) fabrication of cells on the HRT layers with 0, 300, and 800-nm CdS, and (3) preparation of ZnTe:N-based contacts on First Solar materials for stress testing; and collaborated with Brooklyn College for ellipsometry studies of CdS{sub x}Te{sub 1{minus}x} alloy films, and with the University of Buffalo/Brookhaven NSLS for synchrotron X-ray fluorescence studies of interdiffusion in CdS/CdTe bilayers. The a-Si group established a baseline for fabricating a-Si-based solar cells with single, tandem, and triple-junction structures; fabricated a-Si/a-SiGe/a-SiGe triple-junction solar cells with an initial efficiency of 9.7% during the second quarter, and 10.6% during the fourth quarter (after 1166 hours of light-soaking under 1-sun light intensity at 50 C, the 10.6% solar cells stabilized at about 9%); fabricated wide-bandgap a-Si top cells, the highest Voc achieved for the single-junction top cell was 1.02 V, and top cells with high FF (up to 74%) were fabricated routinely; fabricated high-quality narrow-bandgap a-SiGe solar cells with 8.3% efficiency; found that bandgap-graded buffer layers improve the performance (Voc and FF) of the narrow-bandgap a-SiGe bottom cells; and found that a small amount of oxygen partial pressure ({approximately}2 {times} 10{sup {minus}5} torr) was beneficial for growing high-quality films from ITO targets.

Compaan, A. D.; Deng, X.; Bohn, R. G.

2000-01-04T23:59:59.000Z

410

ZnTe:O phosphor development for x-ray imaging applications  

Science Conference Proceedings (OSTI)

An efficient ZnTe:O x-ray powder phosphor was prepared by a dry synthesis process using gaseous doping and etching medias. The x-ray luminescent properties were evaluated and compared to standard commercial phosphors exhibited an x-ray luminescent efficiency equivalent to 76% of Gd{sub 2}O{sub 2}S:Tb and an equal resolution of 2.5 lines/mm. In addition, the fast decay time, low afterglow, and superior spectral match to conventional charge-coupled devices-indicate that ZnTe:O is a very promising phosphor candidate for x-ray imaging applications.

Kang, Z.T.; Summers, C.J.; Menkara, H.; Wagner, B.K.; Durst, R.; Diawara, Y.; Mednikova, G.; Thorson, T. [Phosphor Technology Center of Excellence, School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245 (United States); Georgia Tech Research Institute, Georgia Institute of Technology, Atlanta, Georgia 30332-0826 (United States); Bruker AXS 5465 East Cheryl Parkway, Madison Wisconson 53711 (United States)

2006-03-13T23:59:59.000Z

411

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

412

Advances in large-area Hg1-xCdxTe photovoltaic detectors for remote-sensing applications  

Science Conference Proceedings (OSTI)

State-of-the-art large-area photovoltaic (PV) detectors fabricated in HgCdTe grown by molecular beam epitaxy (MBE) have been demonstrated for the Crosstrack Infrared Sounder (CrIS) instrument. Large-area devices (1 mm in diameter) yielded excellent electrical ... Keywords: HgCdTe, crosstrack infrared sounder, molecular beam epitaxy (MBE), photovoltaic detectors, remote sensing

P. S. Wijewarnasuriya; M. Zandian; J. Phillips; D. Edwall; R. E. Dewames; G. Hildebrandt; J. Bajaj; J. M. Arias; A. I. D'Souza; F. Moore

2002-07-01T23:59:59.000Z

413

Fabrication and characterization of CdTe nano pattern on flexible substrates by nano imprinting and electrodeposition  

Science Conference Proceedings (OSTI)

Nano imprinting technology and the electrodeposition method were applied to make CdTe nano patterns on flexible substrates. An ammonia based aqueous solution was prepared at pH 10.7 and indium tin oxide (ITO)/polyethylene naphthalate (PEN) film with ... Keywords: CdTe nano pattern, Electrodeposition, Flexible substrate, Nano imprinting

Seungju Chun; Kang-Soo Han; Ju-Hyeon Shin; Heon Lee; Donghwan Kim

2010-11-01T23:59:59.000Z

414

Ferroelectric precursor behavior in PbSc0.5Ta0.5O3 detected by field-induced resonant piezoelectric spectroscopy  

E-Print Network (OSTI)

and a ferroelectric transition at 261 K.21 Segments of the primary RUS and RPS spectra are shown in Figs. 4a and b, respectively. The y-axis should be amplitude, in volts, from the amplifier but the spectra have been trans- lated vertically in proportion... in Figs. 4c and d. Note that peaks located below 420 kHz, with the exception of the peak lo- 10 FIG. 4. a) RUS Right: b) RPS spectra of PbSc0.5Ta0.5O3 at high temperature. The left axis is the amplitude (in Volts) but the spectra have been offset...

Aktas, Oktay; Salje, Ekhard K. H.; Crossley, Sam; Lampronti, Giulio I.; Whatmore, Roger W.; Mathur, Neil D.; Carpenter, Michael D.

2013-11-25T23:59:59.000Z

415

2011 Radioactive Materials Usage Survey for Unmonitored Point Sources  

SciTech Connect

This report provides the results of the 2011 Radioactive Materials Usage Survey for Unmonitored Point Sources (RMUS), which was updated by the Environmental Protection (ENV) Division's Environmental Stewardship (ES) at Los Alamos National Laboratory (LANL). ES classifies LANL emission sources into one of four Tiers, based on the potential effective dose equivalent (PEDE) calculated for each point source. Detailed descriptions of these tiers are provided in Section 3. The usage survey is conducted annually; in odd-numbered years the survey addresses all monitored and unmonitored point sources and in even-numbered years it addresses all Tier III and various selected other sources. This graded approach was designed to ensure that the appropriate emphasis is placed on point sources that have higher potential emissions to the environment. For calendar year (CY) 2011, ES has divided the usage survey into two distinct reports, one covering the monitored point sources (to be completed later this year) and this report covering all unmonitored point sources. This usage survey includes the following release points: (1) all unmonitored sources identified in the 2010 usage survey, (2) any new release points identified through the new project review (NPR) process, and (3) other release points as designated by the Rad-NESHAP Team Leader. Data for all unmonitored point sources at LANL is stored in the survey files at ES. LANL uses this survey data to help demonstrate compliance with Clean Air Act radioactive air emissions regulations (40 CFR 61, Subpart H). The remainder of this introduction provides a brief description of the information contained in each section. Section 2 of this report describes the methods that were employed for gathering usage survey data and for calculating usage, emissions, and dose for these point sources. It also references the appropriate ES procedures for further information. Section 3 describes the RMUS and explains how the survey results are organized. The RMUS Interview Form with the attached RMUS Process Form(s) provides the radioactive materials survey data by technical area (TA) and building number. The survey data for each release point includes information such as: exhaust stack identification number, room number, radioactive material source type (i.e., potential source or future potential source of air emissions), radionuclide, usage (in curies) and usage basis, physical state (gas, liquid, particulate, solid, or custom), release fraction (from Appendix D to 40 CFR 61, Subpart H), and process descriptions. In addition, the interview form also calculates emissions (in curies), lists mrem/Ci factors, calculates PEDEs, and states the location of the critical receptor for that release point. [The critical receptor is the maximum exposed off-site member of the public, specific to each individual facility.] Each of these data fields is described in this section. The Tier classification of release points, which was first introduced with the 1999 usage survey, is also described in detail in this section. Section 4 includes a brief discussion of the dose estimate methodology, and includes a discussion of several release points of particular interest in the CY 2011 usage survey report. It also includes a table of the calculated PEDEs for each release point at its critical receptor. Section 5 describes ES's approach to Quality Assurance (QA) for the usage survey. Satisfactory completion of the survey requires that team members responsible for Rad-NESHAP (National Emissions Standard for Hazardous Air Pollutants) compliance accurately collect and process several types of information, including radioactive materials usage data, process information, and supporting information. They must also perform and document the QA reviews outlined in Section 5.2.6 (Process Verification and Peer Review) of ES-RN, 'Quality Assurance Project Plan for the Rad-NESHAP Compliance Project' to verify that all information is complete and correct.

Sturgeon, Richard W. [Los Alamos National Laboratory

2012-06-27T23:59:59.000Z

416

2011 Radioactive Materials Usage Survey for Unmonitored Point Sources  

SciTech Connect

This report provides the results of the 2011 Radioactive Materials Usage Survey for Unmonitored Point Sources (RMUS), which was updated by the Environmental Protection (ENV) Division's Environmental Stewardship (ES) at Los Alamos National Laboratory (LANL). ES classifies LANL emission sources into one of four Tiers, based on the potential effective dose equivalent (PEDE) calculated for each point source. Detailed descriptions of these tiers are provided in Section 3. The usage survey is conducted annually; in odd-numbered years the survey addresses all monitored and unmonitored point sources and in even-numbered years it addresses all Tier III and various selected other sources. This graded approach was designed to ensure that the appropriate emphasis is placed on point sources that have higher potential emissions to the environment. For calendar year (CY) 2011, ES has divided the usage survey into two distinct reports, one covering the monitored point sources (to be completed later this year) and this report covering all unmonitored point sources. This usage survey includes the following release points: (1) all unmonitored sources identified in the 2010 usage survey, (2) any new release points identified through the new project review (NPR) process, and (3) other release points as designated by the Rad-NESHAP Team Leader. Data for all unmonitored point sources at LANL is stored in the survey files at ES. LANL uses this survey data to help demonstrate compliance with Clean Air Act radioactive air emissions regulations (40 CFR 61, Subpart H). The remainder of this introduction provides a brief description of the information contained in each section. Section 2 of this report describes the methods that were employed for gathering usage survey data and for calculating usage, emissions, and dose for these point sources. It also references the appropriate ES procedures for further information. Section 3 describes the RMUS and explains how the survey results are organized. The RMUS Interview Form with the attached RMUS Process Form(s) provides the radioactive materials survey data by technical area (TA) and building number. The survey data for each release point includes information such as: exhaust stack identification number, room number, radioactive material source type (i.e., potential source or future potential source of air emissions), radionuclide, usage (in curies) and usage basis, physical state (gas, liquid, particulate, solid, or custom), release fraction (from Appendix D to 40 CFR 61, Subpart H), and process descriptions. In addition, the interview form also calculates emissions (in curies), lists mrem/Ci factors, calculates PEDEs, and states the location of the critical receptor for that release point. [The critical receptor is the maximum exposed off-site member of the public, specific to each individual facility.] Each of these data fields is described in this section. The Tier classification of release points, which was first introduced with the 1999 usage survey, is also described in detail in this section. Section 4 includes a brief discussion of the dose estimate methodology, and includes a discussion of several release points of particular interest in the CY 2011 usage survey report. It also includes a table of the calculated PEDEs for each release point at its critical receptor. Section 5 describes ES's approach to Quality Assurance (QA) for the usage survey. Satisfactory completion of the survey requires that team members responsible for Rad-NESHAP (National Emissions Standard for Hazardous Air Pollutants) compliance accurately collect and process several types of information, including radioactive materials usage data, process information, and supporting information. They must also perform and document the QA reviews outlined in Section 5.2.6 (Process Verification and Peer Review) of ES-RN, 'Quality Assurance Project Plan for the Rad-NESHAP Compliance Project' to verify that all information is complete and correct.

Sturgeon, Richard W. [Los Alamos National Laboratory

2012-06-27T23:59:59.000Z

417

Search for heavy narrow dilepton resonances in pp collisions at $\\sqrt{s}$ = 7 TeV and $\\sqrt{s}$ = 8 TeV  

E-Print Network (OSTI)

An updated search for heavy narrow resonances decaying to muon or electron pairs using the CMS detector is presented. Data samples from pp collisions at $\\sqrt{s}$ = 7 TeV and 8 TeV at the LHC, with integrated luminosities of up to 5.3 and 4.1 inverse femtobarns, respectively, are combined. No evidence for a heavy narrow resonance is observed. The analysis of the combined data sets excludes, at 95% confidence level, a Sequential Standard Model Z'$_{SSM}$ resonance lighter than 2590 GeV, a superstring-inspired Z'$_{\\psi}$ lighter than 2260 GeV, and Kaluza-Klein gravitons lighter than 2390 (2030) GeV, assuming that the coupling parameter $k/\\bar{M}_{Pl}$ is 0.10 (0.05). These are the most stringent limits to date.

Chatrchyan, Serguei; Sirunyan, Albert M; Tumasyan, Armen; Adam, Wolfgang; Aguilo, Ernest; Bergauer, Thomas; Dragicevic, Marko; Erö, Janos; Fabjan, Christian; Friedl, Markus; Fruehwirth, Rudolf; Ghete, Vasile Mihai; Hörmann, Natascha; Hrubec, Josef; Jeitler, Manfred; Kiesenhofer, Wolfgang; Knünz, Valentin; Krammer, Manfred; Krätschmer, Ilse; Liko, Dietrich; Mikulec, Ivan; Pernicka, Manfred; Rabady, Dinyar; Rahbaran, Babak; Rohringer, Christine; Rohringer, Herbert; Schöfbeck, Robert; Strauss, Josef; Taurok, Anton; Waltenberger, Wolfgang; Wulz, Claudia-Elisabeth; Mossolov, Vladimir; Shumeiko, Nikolai; Suarez Gonzalez, Juan; Bansal, Monika; Bansal, Sunil; Cornelis, Tom; De Wolf, Eddi A; Janssen, Xavier; Luyckx, Sten; Mucibello, Luca; Ochesanu, Silvia; Roland, Benoit; Rougny, Romain; Selvaggi, Michele; Van Haevermaet, Hans; Van Mechelen, Pierre; Van Remortel, Nick; Van Spilbeeck, Alex; Blekman, Freya; Blyweert, Stijn; D'Hondt, Jorgen; Gonzalez Suarez, Rebeca; Kalogeropoulos, Alexis; Maes, Michael; Olbrechts, Annik; Tavernier, Stefaan; Van Doninck, Walter; Van Mulders, Petra; Van Onsem, Gerrit Patrick; Villella, Ilaria; Clerbaux, Barbara; De Lentdecker, Gilles; Dero, Vincent; Gay, Arnaud; Hreus, Tomas; Léonard, Alexandre; Marage, Pierre Edouard; Mohammadi, Abdollah; Reis, Thomas; Thomas, Laurent; Vander Velde, Catherine; Vanlaer, Pascal; Wang, Jian; Adler, Volker; Beernaert, Kelly; Cimmino, Anna; Costantini, Silvia; Garcia, Guillaume; Grunewald, Martin; Klein, Benjamin; Lellouch, Jérémie; Marinov, Andrey; Mccartin, Joseph; Ocampo Rios, Alberto Andres; Ryckbosch, Dirk; Sigamani, Michael; Strobbe, Nadja; Thyssen, Filip; Tytgat, Michael; Walsh, Sinead; Yazgan, Efe; Zaganidis, Nicolas; Basegmez, Suzan; Bruno, Giacomo; Castello, Roberto; Ceard, Ludivine; Delaere, Christophe; Du Pree, Tristan; Favart, Denis; Forthomme, Laurent; Giammanco, Andrea; Hollar, Jonathan; Lemaitre, Vincent; Liao, Junhui; Militaru, Otilia; Nuttens, Claude; Pagano, Davide; Pin, Arnaud; Piotrzkowski, Krzysztof; Vizan Garcia, Jesus Manuel; Beliy, Nikita; Caebergs, Thierry; Daubie, Evelyne; Hammad, Gregory Habib; Alves, Gilvan; Correa Martins Junior, Marcos; Martins, Thiago; Pol, Maria Elena; Henrique Gomes E Souza, Moacyr; Aldá Júnior, Walter Luiz; Carvalho, Wagner; Custódio, Analu; Da Costa, Eliza Melo; De Jesus Damiao, Dilson; De Oliveira Martins, Carley; Fonseca De Souza, Sandro; Malbouisson, Helena; Malek, Magdalena; Matos Figueiredo, Diego; Mundim, Luiz; Nogima, Helio; Prado Da Silva, Wanda Lucia; Santoro, Alberto; Soares Jorge, Luana; Sznajder, Andre; Vilela Pereira, Antonio; Souza Dos Anjos, Tiago; Bernardes, Cesar Augusto; De Almeida Dias, Flavia; Tomei, Thiago; De Moraes Gregores, Eduardo; Lagana, Caio; Da Cunha Marinho, Franciole; Mercadante, Pedro G; Novaes, Sergio F; Padula, Sandra; Genchev, Vladimir; Iaydjiev, Plamen; Piperov, Stefan; Rodozov, Mircho; Stoykova, Stefka; Sultanov, Georgi; Tcholakov, Vanio; Trayanov, Rumen; Vutova, Mariana; Dimitrov, Anton; Hadjiiska, Roumyana; Kozhuharov, Venelin; Litov, Leander; Pavlov, Borislav; Petkov, Peicho; Bian, Jian-Guo; Chen, Guo-Ming; Chen, He-Sheng; Jiang, Chun-Hua; Liang, Dong; Liang, Song; Meng, Xiangwei; Tao, Junquan; Wang, Jian; Wang, Xianyou; Wang, Zheng; Xiao, Hong; Xu, Ming; Zang, Jingjing; Zhang, Zhen; Asawatangtrakuldee, Chayanit; Ban, Yong; Guo, Yifei; Li, Wenbo; Liu, Shuai; Mao, Yajun; Qian, Si-Jin; Teng, Haiyun; Wang, Dayong; Zhang, Linlin; Zou, Wei; Avila, Carlos; Carrillo Montoya, Camilo Andres; Gomez, Juan Pablo; Gomez Moreno, Bernardo; Osorio Oliveros, Andres Felipe; Sanabria, Juan Carlos; Godinovic, Nikola; Lelas, Damir; Plestina, Roko; Polic, Dunja; Puljak, Ivica; Antunovic, Zeljko; Kovac, Marko; Brigljevic, Vuko; Duric, Senka; Kadija, Kreso; Luetic, Jelena; Mekterovic, Darko; Morovic, Srecko; Tikvica, Lucija; Attikis, Alexandros; Galanti, Mario; Mavromanolakis, Georgios; Mousa, Jehad; Nicolaou, Charalambos; Ptochos, Fotios; Razis, Panos A; Finger, Miroslav; Finger Jr, Michael; Assran, Yasser; Elgammal, Sherif; Ellithi Kamel, Ali; Kuotb Awad, Alaa Metwaly; Mahmoud, Mohammed; Radi, Amr; Kadastik, Mario; Müntel, Mait; Murumaa, Marion; Raidal, Martti; Rebane, Liis; Tiko, Andres; Eerola, Paula; Fedi, Giacomo; Voutilainen, Mikko; Härkönen, Jaakko; Heikkinen, Mika Aatos; Karimäki, Veikko; Kinnunen, Ritva; Kortelainen, Matti J; Lampén, Tapio; Lassila-Perini, Kati; Lehti, Sami; Lindén, Tomas; Luukka, Panja-Riina; Mäenpää, Teppo; Peltola, Timo; Tuominen, Eija; Tuominiemi, Jorma; Tuovinen, Esa; Ungaro, Donatella; Wendland, Lauri; Korpela, Arja; Tuuva, Tuure

2013-01-01T23:59:59.000Z

418

Search for heavy narrow dilepton resonances in pp collisions at sqrt(s) = 7 TeV and sqrt(s) = 8 TeV  

E-Print Network (OSTI)

An updated search for heavy narrow resonances decaying to muon or electron pairs using the CMS detector is presented. Data samples from pp collisions at sqrt(s) = 7 TeV and 8 TeV at the LHC, with integrated luminosities of up to 5.3 and 4.1 inverse femtobarns, respectively, are combined. No evidence for a heavy narrow resonance is observed. The analysis of the combined data sets excludes, at 95% confidence level, a Sequential Standard Model Z'[SSM] resonance lighter than 2590 GeV, a superstring-inspired Z'[psi] lighter than 2260 GeV, and Kaluza-Klein gravitons lighter than 2390 (2030) GeV, assuming that the coupling parameter k/M-bar[Pl] is 0.10 (0.05). These are the most stringent limits to date.

CMS Collaboration

2012-12-26T23:59:59.000Z

419

Preparation and properties of evaporated CdTe films compared with single-crystal CdTe. Progress report No. 5, November 1, 1981-January 31, 1982  

DOE Green Energy (OSTI)

The hot-wall vacuum evaporator system has been put into use with successful deposition of seven thin films of n-type CdTe on glass. Microprobe analysis indicated that the films were stoichiometric CdTe. Optical transmission showed a well-defined absorption edge. Film resistivities on glass were reduced from 1.7 x 10/sup 8/ ohm-cm, to 6 x 10/sup 4/ ohm-cm by In doping; film resistivities under AM1.5 illumination are 2.0 x 10/sup 4/ and 5 x 10/sup 2/ ohm-cm, respectively compared to the dark values given above. Temperature dependence of the dark conductivity of the undoped CdTe film indicates an activation energy of 0.79 eV; in the light the activation energy was reduced to 0.1 eV. The high dark resistivity and activation energy indicate high intergrain potential barriers, which could produce the high resistivities observed even with fairly high free electron densities in the grains. Comparison will be sought between these results and those found for films deposited epitaxially on single crystal substrates. A detailed summary of absorption constant vs wavelength data for CdTe has been assembled for both single crystal and thin film materials. The absorption constant for thin film material appears to vary from 2 x 10/sup 4/ cm/sup -1/ at 8000A to 10/sup 5/ cm/sup -1/ at 5000A; single crystal values may be slightly higher. EBIC and light scanning techniques are being developed for characterizing grain boundary effects in bicrystals, and to evaluate the effects of passivation techniques. Defect densities at a grain boundary in a p-type bicrystal were found to range from 2 x 10/sup 12/ to 8 x 10/sup 12/ cm/sup -2/eV/sup -1/, using data derived from the J-V dependence of the grain boundary.

Bube, R H

1982-01-01T23:59:59.000Z

420

Sb[subscript 2]Te[subscript 3] and Bi[subscript 2]Te[subscript 3] Thin Films Grown by Room-Temperature MBE  

Science Conference Proceedings (OSTI)

Sb{sub 2}Te3 and Bi{sub 2}Te3 thin films were grown on SiO{sub 2} and BaF{sub 2} substrates at room temperature using molecular beam epitaxy. Metallic layers with thicknesses of 0.2 nm were alternately deposited at room temperature, and the films were subsequently annealed at 250 C for 2 h. x-Ray diffraction and energy-filtered transmission electron microscopy (TEM) combined with high-accuracy energy-dispersive x-ray spectrometry revealed stoichiometric films, grain sizes of less than 500 nm, and a texture. High-quality in-plane thermoelectric properties were obtained for Sb{sub 2}Te3 films at room temperature, i.e., low charge carrier density (2.6 x 10{sup 19} cm{sup -3}, large thermopower (130 {micro}V K{sup -1}), large charge carrier mobility (402 cm{sup 2} V{sup -1} s{sup -1}), and resulting large power factor (29 {micro}W cm{sup -1} K{sup -2}). Bi{sub 2}Te3 films also showed low charge carrier density (2.7 x 10{sup 19} cm{sup -3}), moderate thermopower (-153 {micro}V K{sup -1}), but very low charge carrier mobility (80 cm{sup 2} V{sup -1} s{sup -1}), yielding low power factor (8 {micro}W cm{sup -1} K{sup -2}). The low mobilities were attributed to Bi-rich grain boundary phases identified by analytical energy-filtered TEM.

Aabdin, Z.; Peranio, N.; Winkler, M.; Bessas, D.; König, J.; Hermann, R.P.; Böttner, H.; Eibl, O. (Julich); (Tubingen); (Fraunhofer)

2012-10-23T23:59:59.000Z

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421

The comprehensive phase evolution for Bi[subscript 2]Te[subscript 3] topological compound as function of pressure  

Science Conference Proceedings (OSTI)

The recently discovered three-dimensional topological insulator Bi{sub 2}Te{sub 3} is studied as function of pressure in terms of crystal structures, resistance, and Hall coefficient. The superconductivity is found in phase I (ambient phase) Bi{sub 2}Te{sub 3} with T{sub c}-3 K, which is related to the topological features. The evolution of crystal structure with pressure is investigated by high pressure synchrotron radiation experiments that reveal structural transitions occurring at about 8 GPa, 13 GPa, and 16 GPa, respectively. Furthermore, the high pressure phases of Bi{sub 2}Te{sub 3} are also superconducting but with much higher T{sub c}-8 K. The superconducting transitions are compared with those for Bi, Te elements. A global phase diagram of Bi{sub 2}Te{sub 3} as function of pressure up to 30 GPa is obtained.

Zhang, S.J.; Zhang, J.L.; Yu, X.H.; Zhu, J.; Kong, P.P.; Feng, S.M.; Liu, Q.Q.; Yang, L.X.; Wang, X.C.; Cao, L.Z.; Yang, W.G.; Wang, L.; Mao, H.K.; Zhao, Y.S.; Liu, H.Z.; Dai, X.; Fang, Z.; Zhang, S.C.; Jin, C.Q. (Stanford); (Harbin); (UST - China); (CIW); (Chinese Aca. Sci.); (LANL)

2012-06-26T23:59:59.000Z

422

Coherent optical phonon spectroscopy studies of femtosecond-laser modified Sb{sub 2}Te{sub 3} films  

Science Conference Proceedings (OSTI)

We performed time-resolved reflectivity measurements to monitor changes in optical phonon modes in Sb{sub 2}Te{sub 3} thin films under femtosecond laser irradiation. We found that a phonon mode at 3.64 THz appears after high-fluence laser irradiation, in addition to the phonon modes of Sb{sub 2}Te{sub 3}. We determined that the additional mode is due to Te segregation as a result of laser-induced decomposition of the Sb{sub 2}Te{sub 3} film. This experiment clearly illustrates the irreversible effects of femtosecond laser irradiation during the measurement of coherent optical phonon dynamics in Sb{sub 2}Te{sub 3}.

Li Yuwei; Wang Guoyu [Department of Physics, University of Michigan, Ann Arbor, Michigan 48109 (United States); Center for Solar and Thermal Energy Conversion, University of Michigan, Michigan 48109 (United States); Stoica, Vladimir A. [Center for Solar and Thermal Energy Conversion, University of Michigan, Michigan 48109 (United States); Applied Physics Program, University of Michigan, Ann Arbor, Michigan 48109 (United States); Endicott, Lynn [Department of Physics, University of Michigan, Ann Arbor, Michigan 48109 (United States); Uher, Ctirad; Clarke, Roy [Department of Physics, University of Michigan, Ann Arbor, Michigan 48109 (United States); Center for Solar and Thermal Energy Conversion, University of Michigan, Michigan 48109 (United States); Applied Physics Program, University of Michigan, Ann Arbor, Michigan 48109 (United States)

2010-10-25T23:59:59.000Z

423

Posters | Advanced Photon Source  

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

Your Cart (0 Posters) Your Cart (0 Posters) Your cart is empty. checkout Subtotal: $0.00 update empty Posters Order a printed APS poster! 11 in. x 17 in. prints will be mailed in the order requests are received. 36 in. x 36 in. posters will be sent to school addresses once all orders are processed. The Advanced Photon Source Is The Advanced Photon Source Is Qty: 1 add to cart Technologies from Materials Science Technologies from Materials Science Qty: 1 add to cart Materials Under Extreme Pressure Materials Under Extreme Pressure Qty: 1 add to cart Biological Macromolecules in Action Biological Macromolecules in Action Qty: 1 add to cart Journey to the Center of the Earth Journey to the Center of the Earth Qty: 1 add to cart Earthshaking Monitor Earthshaking Monitor Qty: 1 add to cart Imaging with X-rays

424

Photon Source Parameters  

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

Photon Source Parameters Print Photon Source Parameters Print Summary Graph of Brightness Curves for All Insertion Devices Insertion Device and Bend Magnet Parameters Bend Magnet Superbend Magnet U30 Undulator U50 Undulator U80 Undulator U100 Undulator W114 Wiggler The ALS has six elliptically polarizing undulators, two in straight 4, two in straight 11, and one each in straights 6 and 7. All are arranged with chicanes so that two such devices can be installed to feed two independent beamlines. They can be used in a variety of polarization modes, including circular, elliptical, horizontal, and vertical. These modes can be chosen by appropriate phasing of the magnet rows. The brightness and flux curves below are shown for horizontal and circular polarization. Curves for elliptical and vertical polarization are similar to the horizontal polarization curve, but the minimum photon energy is higher.

425

Photon Source Parameters  

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

Photon Source Parameters Print Photon Source Parameters Print Summary Graph of Brightness Curves for All Insertion Devices Insertion Device and Bend Magnet Parameters Bend Magnet Superbend Magnet U30 Undulator U50 Undulator U80 Undulator U100 Undulator W114 Wiggler The ALS has six elliptically polarizing undulators, two in straight 4, two in straight 11, and one each in straights 6 and 7. All are arranged with chicanes so that two such devices can be installed to feed two independent beamlines. They can be used in a variety of polarization modes, including circular, elliptical, horizontal, and vertical. These modes can be chosen by appropriate phasing of the magnet rows. The brightness and flux curves below are shown for horizontal and circular polarization. Curves for elliptical and vertical polarization are similar to the horizontal polarization curve, but the minimum photon energy is higher.

426

Advanced Photon Source  

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

Home Home Group Members Accelerator Magnets Insertion Devices Facilities Presentations & Publications Internal Magnetic Devices Group The primary mission of the Magnetic Devices (MD) Group is to design, build, and maintain Insertion Devices (IDs) that are reliable and transparent to the electron beam at the Advanced Photon Source (APS). The majority of IDs at the APS are conventional planar hybrid undulators, but an essential part of the mission is to develop novel IDs, such as short-period superconducting undulators and long-period electromagnetic undulators. The capabilities of APS IDs are matched to users' experimental needs. The mission also includes magnetic tuning of the IDs to ensure their near-ideal performance as x-ray sources and calculations to predict the radiation

427

Photon Source Parameters  

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

Photon Source Parameters Print Photon Source Parameters Print Summary Graph of Brightness Curves for All Insertion Devices Insertion Device and Bend Magnet Parameters Bend Magnet Superbend Magnet U30 Undulator U50 Undulator U80 Undulator U100 Undulator W114 Wiggler The ALS has six elliptically polarizing undulators, two in straight 4, two in straight 11, and one each in straights 6 and 7. All are arranged with chicanes so that two such devices can be installed to feed two independent beamlines. They can be used in a variety of polarization modes, including circular, elliptical, horizontal, and vertical. These modes can be chosen by appropriate phasing of the magnet rows. The brightness and flux curves below are shown for horizontal and circular polarization. Curves for elliptical and vertical polarization are similar to the horizontal polarization curve, but the minimum photon energy is higher.

428

Photon Source Parameters  

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

Photon Source Parameters Print Photon Source Parameters Print Summary Graph of Brightness Curves for All Insertion Devices Insertion Device and Bend Magnet Parameters Bend Magnet Superbend Magnet U30 Undulator U50 Undulator U80 Undulator U100 Undulator W114 Wiggler The ALS has six elliptically polarizing undulators, two in straight 4, two in straight 11, and one each in straights 6 and 7. All are arranged with chicanes so that two such devices can be installed to feed two independent beamlines. They can be used in a variety of polarization modes, including circular, elliptical, horizontal, and vertical. These modes can be chosen by appropriate phasing of the magnet rows. The brightness and flux curves below are shown for horizontal and circular polarization. Curves for elliptical and vertical polarization are similar to the horizontal polarization curve, but the minimum photon energy is higher.

429

Overview | Advanced Photon Source  

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

APS Overview: APS Overview: Introduction APS Systems Map LINAC Booster Synchrotron Storage Ring Insertion Devices Experiment Hall LOMs & Beamlines Overview of the APS The Advanced Photon Source (APS) at the U.S. Department of Energy's Argonne National Laboratory provides this nation's (in fact, this hemisphere's) brightest storage ring-generated x-ray beams for research in almost all scientific disciplines. Photo: Aerial Photo of APS Aerial photo of the Advanced Photon Source These x-rays allow scientists to pursue new knowledge about the structure and function of materials in the center of the Earth and in outer space, and all points in between. The knowledge gained from this research can impact the evolution of combustion engines and microcircuits, aid in the development of new pharmaceuticals, and pioneer nanotechnologies whose

430

National Synchrotron Light Source  

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

Report 2001 Report 2001 National Synchrotron Light Source For the period October 1, 2000 through September 30, 2001 Introduction Science Highlights Year in Review Operations Publications Abstracts Nancye Wright & Lydia Rogers The National Synchrotron Light Source Department is supported by the Office of Basic Energy Sciences United States Department of Energy Washington, D.C. Brookhaven National Laboratory Brookhaven Science Associates, Inc. Upton, New York 11973 Under Contract No. DE-AC02-98CH10886 Mary Anne Corwin Steven N. Ehrlich & Lisa M. Miller Managing Editor Science Editors Production Assistants Cover images (clockwise from top left) 1. from Science Highlight by K.R. Rajashankar, M.R. Chance, S.K. Burley, J. Jiang, S.C. Almo, A. Bresnick, T. Dodatko, R. Huang, G. He,

431

Advanced Photon Source  

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

Tomography Interest Group Contact: Robert Winarski, Center for Nanoscale Materials winarski@anl.gov Contact: Francesco De Carlo, Advanced Photon Source decarlo@aps.anl.gov The tomography special interest group of the Advanced Photon Source (APS) at Argonne National Laboratory has been created to promote awareness of the tomography facilities at the APS and to foster communications between the various research groups. Through this group, we believe we can build a strong user community for tomography. The following beamlines have active tomography research programs: 2-BM-B (XOR) http://www.aps.anl.gov/Xray_Science_Division/Xray_Microscopy_and_Imaging/Science_and_Research/Techniques/Tomography/index.html Information about the beamline: http://beam.aps.anl.gov/pls/apsweb/beamline_display_pkg.display_beamline?p_beamline_num_c=31

432

Filtered cathodic arc source  

DOE Patents (OSTI)

Disclosed is a continuous, cathodic arc ion source coupled to a macro-particle filter capable of separation or elimination of macro-particles from the ion flux produced by cathodic arc discharge. The ion source employs an axial magnetic field on a cathode (target) having tapered sides to confine the arc, thereby providing high target material utilization. A bent magnetic field is used to guide the metal ions from the target to the part to be coated. The macro-particle filter consists of two straight solenoids, end to end, but placed at 45{degrees} to one another, which prevents line-of-sight from the arc spot on the target to the parts to be coated, yet provides a path for ions and electrons to flow, and includes a series of baffles for trapping the macro-particles.

Falabella, S.; Sanders, D.M.

1992-12-31T23:59:59.000Z

433

Evaluated teletherapy source library  

DOE Patents (OSTI)

The Evaluated Teletherapy Source Library (ETSL) is a system of hardware and software that provides for maintenance of a library of useful phase space descriptions (PSDs) of teletherapy sources used in radiation therapy for cancer treatment. The PSDs are designed to be used by PEREGRINE, the all-particle Monte Carlo dose calculation system. ETSL also stores other relevant information such as monitor unit factors (MUFs) for use with the PSDs, results of PEREGRINE calculations using the PSDs, clinical calibration measurements, and geometry descriptions sufficient for calculational purposes. Not all of this information is directly needed by PEREGRINE. It also is capable of acting as a repository for the Monte Carlo simulation history files from which the generic PSDs are derived.

Cox, Lawrence J. (Los Alamos, NM); Schach Von Wittenau, Alexis E. (Livermore, CA)

2000-01-01T23:59:59.000Z

434

Calibrated vapor generator source  

DOE Patents (OSTI)

A portable vapor generator is disclosed that can provide a controlled source of chemical vapors, such as, narcotic or explosive vapors. This source can be used to test and calibrate various types of vapor detection systems by providing a known amount of vapors to the system. The vapor generator is calibrated using a reference ion mobility spectrometer. A method of providing this vapor is described, as follows: explosive or narcotic is deposited on quartz wool, placed in a chamber that can be heated or cooled (depending on the vapor pressure of the material) to control the concentration of vapors in the reservoir. A controlled flow of air is pulsed over the quartz wool releasing a preset quantity of vapors at the outlet.

Davies, John P. (Idaho Falls, ID); Larson, Ronald A. (Idaho Falls, ID); Goodrich, Lorenzo D. (Shelley, ID); Hall, Harold J. (Idaho Falls, ID); Stoddard, Billy D. (Idaho Falls, ID); Davis, Sean G. (Idaho Falls, ID); Kaser, Timothy G. (Idaho Falls, ID); Conrad, Frank J. (Albuquerque, NM)

1995-01-01T23:59:59.000Z

435

Calibrated vapor generator source  

DOE Patents (OSTI)

A portable vapor generator is disclosed that can provide a controlled source of chemical vapors, such as, narcotic or explosive vapors. This source can be used to test and calibrate various types of vapor detection systems by providing a known amount of vapors to the system. The vapor generator is calibrated using a reference ion mobility spectrometer. A method of providing this vapor is described, as follows: explosive or narcotic is deposited on quartz wool, placed in a chamber that can be heated or cooled (depending on the vapor pressure of the material) to control the concentration of vapors in the reservoir. A controlled flow of air is pulsed over the quartz wool releasing a preset quantity of vapors at the outlet. 10 figs.

Davies, J.P.; Larson, R.A.; Goodrich, L.D.; Hall, H.J.; Stoddard, B.D.; Davis, S.G.; Kaser, T.G.; Conrad, F.J.

1995-09-26T23:59:59.000Z

436

Filtered cathodic arc source  

DOE Patents (OSTI)

A continuous, cathodic arc ion source coupled to a macro-particle filter capable of separation or elimination of macro-particles from the ion flux produced by cathodic arc discharge is described. The ion source employs an axial magnetic field on a cathode (target) having tapered sides to confine the arc, thereby providing high target material utilization. A bent magnetic field is used to guide the metal ions from the target to the part to be coated. The macro-particle filter consists of two straight solenoids, end to end, but placed at 45[degree] to one another, which prevents line-of-sight from the arc spot on the target to the parts to be coated, yet provides a path for ions and electrons to flow, and includes a series of baffles for trapping the macro-particles. 3 figures.

Falabella, S.; Sanders, D.M.

1994-01-18T23:59:59.000Z

437

Open Source Physics  

E-Print Network (OSTI)

Open Source Physics (Brown, 2012; Christian, 2010; Esquembre, 2012; Hwang, 2010) empowers teachers and students to create and use these free tools with the associated intellectual property rights given to customise (Wee & Mak, 2009) the computer models/tools to suit their teaching and learning needs. Open Source Physics (OSP) focuses on design of computer models, such as Easy Java Simulations (EJS) and the use of video modeling and analysis (Tracker). They allow students to investigate, explore and analyse data which is either real or simulated. The OSP approach helps users overcome barriers in creating, using and scaling up meaningful ICT use in education. In Singapore, teachers and students have created or customised existing computer models to design and re-purpose EJS models to suit their context and learning needs. Tracker tools allow students to analyse different aspects of a physics phenomena to deepen their understanding of abstract physics concepts. Using Tracker, students record the motion of ob...

Wee, Loo Kang

2013-01-01T23:59:59.000Z

438

Voltage controlled current source  

DOE Patents (OSTI)

A seven decade, voltage controlled current source is described for use in testing intermediate range nuclear instruments that covers the entire test current range of from 10 picoamperes to 100 microamperes. High accuracy is obtained throughout the entire seven decades of output current with circuitry that includes a coordinated switching scheme responsive to the input signal from a hybrid computer to control the input voltage to an antilog amplifier, and to selectively connect a resistance to the antilog amplifier output to provide a continuous output current source as a function of a preset range of input voltage. An operator controlled switch provides current adjustment for operation in either a real-time simulation test mode or a time response test mode.

Casne, Gregory M. (Pittsburgh, PA)

1992-01-01T23:59:59.000Z

439

Advanced Photon Source  

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

0 Advanced Photon Source 0 Advanced Photon Source A U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences national synchrotron x-ray research facility Search Button About Welcome Overview Visiting the APS Mission & Goals Find People Organization Charts Committees Job Openings User Information Prospective Users New Users Current Users APS User Portal Macromolecular Crystallographers Administrators Find a Beamline Apply for Beam Time Contacts Calendars Community Scientific Access Site Access Training Science & Education Science & Research Highlights Conferences Seminars Publications Annual Reports APS Upgrade Courses and Schools Graduate Programs Scientific Software Media Center Calendar of Events APS News User News Argonne/APS Press Releases Argonne/APS Feature Stories Argonne/APS In The News

440

Comparisons with Other sources  

U.S. Energy Information Administration (EIA) Indexed Site

Estimates Compared with Other sources Estimates Compared with Other sources The following seven graphs were prepared to give a sense of the variation and confidence level of the EIA-914 estimates. Each graph shows the reported sample production (the starting point for making an estimate), the EIA-914 estimates, State reported data, HPDI reported data, and Lippman Consulting data for comparison. State data are obtained directly from the States usually via a State agency web site as a monthly total. HPDI is a commercial data vender. They acquire data from all the States and provide it to EIA in a single format and query system at the well or lease level. EIA then sums this data to the operator level and State level. HPDI data typically lag the State data by 1 or 2 months.

Note: This page contains sample records for the topic "ta te source" from the National Library of EnergyBeta (NLEBeta).
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they are not comprehensive nor are they the most current set.
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441

FABRICATION OF NEUTRON SOURCES  

DOE Patents (OSTI)

A method is presented for preparing a more efficient neutron source comprising inserting in a container a quantity of Po-210, inserting B powder coated with either Ag, Pt, or Ni. The container is sealed and then slowly heated to about 450 C to volatilize the Po and effect combination of the coated powder with the Po. The neutron flux emitted by the unit is moritored and the heating step is terminated when the flux reaches a maximum or selected level.

Birden, J.H.

1959-01-20T23:59:59.000Z

442

Compact superradiant Cerenkov source  

Science Conference Proceedings (OSTI)

An economical, coherent, and widely tunable source does not exist spanning the far-infrared electromagnetic spectral range of 50-1000 {mu}m in wavelength. The Cerenkov free-electron laser (CFEL) is a promising candidate. This report describes an experimental investigation of a compact CFEL driven by a high-quality low-energy electron beam. Cerenkov emission and strong gain but remarkably low output coupling were observed.

Owens, I.J.; Brownell, J.H. [Department of Physics and Astronomy, Dartmouth College, Hanover, New Hampshire 03755-3528 (United States)

2005-05-15T23:59:59.000Z

443

High current ion source  

DOE Patents (OSTI)

An ion source utilizing a cathode and anode for producing an electric arc therebetween. The arc is sufficient to vaporize a portion of the cathode to form a plasma. The plasma leaves the generation region and expands through another regon. The density profile of the plasma may be flattened using a magnetic field formed within a vacuum chamber. Ions are extracted from the plasma to produce a high current broad on beam.

Brown, Ian G. (1088 Woodside Rd., Berkeley, CA 94708); MacGill, Robert A. (645 Kern St., Richmond, CA 94805); Galvin, James E. (2 Commodore Dr. #276, Emeryville, CA 94608)

1990-01-01T23:59:59.000Z

444

Negative ion source  

DOE Patents (OSTI)

A method and apparatus for providing a negative ion source accelerates electrons away from a hot filament electron emitter into a region of crossed electric and magnetic fields arranged in a magnetron configuration. During a portion of the resulting cycloidal path, the electron velocity is reduced below its initial value. The electron accelerates as it leaves the surface at a rate of only slightly less than if there were no magnetic field, thereby preventing a charge buildup at the surface of the emitter. As the electron traverses the cycloid, it is decelerated during the second, third, and fourth quadrants, then reeccelerated as it approaches the end of the fourth quadrant to regain its original velocity. The minimum velocity occurs during the fourth quadrant, and corresponds to an electron temperature of 200.degree. to 500.degree. for the electric and magnetic fields commonly encountered in the ion sources of magnetic sector mass spectrometers. An ion source using the above-described thermalized electrons is also disclosed.

Delmore, James E. (Idaho Falls, ID)

1987-01-01T23:59:59.000Z

445

Open-Source GIS  

SciTech Connect

The components making up an Open Source GIS are explained in this chapter. A map server (Sect. 30.1) can broadly be defined as a software platform for dynamically generating spatially referenced digital map products. The University of Minnesota MapServer (UMN Map Server) is one such system. Its basic features are visualization, overlay, and query. Section 30.2 names and explains many of the geospatial open source libraries, such as GDAL and OGR. The other libraries are FDO, JTS, GEOS, JCS, MetaCRS, and GPSBabel. The application examples include derived GIS-software and data format conversions. Quantum GIS, its origin and its applications explained in detail in Sect. 30.3. The features include a rich GUI, attribute tables, vector symbols, labeling, editing functions, projections, georeferencing, GPS support, analysis, and Web Map Server functionality. Future developments will address mobile applications, 3-D, and multithreading. The origins of PostgreSQL are outlined and PostGIS discussed in detail in Sect. 30.4. It extends PostgreSQL by implementing the Simple Feature standard. Section 30.5 details the most important open source licenses such as the GPL, the LGPL, the MIT License, and the BSD License, as well as the role of the Creative Commons.

Vatsavai, Raju [ORNL; Burk, Thomas E [University of Minnesota; Lime, Steve [Minnesota Department of Natural Resources

2012-01-01T23:59:59.000Z

446

Improved negative ion source  

DOE Patents (OSTI)

A method and apparatus for providing a negative ion source accelerates electrons away from a hot filament electron emitter into a region of crossed electric and magnetic fields arranged in a magnetron configuration. During a portion of the resulting cycloidal path, the electron velocity is reduced below its initial value. The electron accelerates as it leaves the surface at a rate of only slightly less than if there were no magnetic field, thereby preventing a charge buildup at the surface of the emitter. As the electron traverses the cycloid, it is decelerated during the second, third, and fourth quadrants, then reaccelerated as it approaches the end of the fourth quadrant to regain its original velocity. The minimum velocity occurs during the fourth quadrant, and corresponds to an electron temperature of 200 to 500/sup 0/C for the electric and magnetic fields commonly encountered in the ion sources of magnetic sector mass spectrometers. An ion source using the above-described thermalized electrons is also disclosed.

Delmore, J.E.

1984-05-01T23:59:59.000Z

447

Measurement of W and Z production cross-sections in p{bar p} collisions at {radical}s = 1.8 TeV  

Science Conference Proceedings (OSTI)

The cross sections for W and Z production in p{bar p} collisions at {radical}s = 1.8 TeV are measured using the D0 detector at the Fermilab Tevatron collider. The detected final states are W {yields} ev{sub e}, Z {yields} e{sup +}e{sup {minus}}, W {yields} {mu}v{sub {mu}}, and Z {yields} {mu}{sup +}{mu}{sup {minus}}. In the ratio of these measurements, many common sources of systematic error cancel and we measure R = {sigma},(p{bar p} {yields} W) {center_dot} Br(W {yields} lv)/ {sigma},(p{bar p} {yields} Z) {center_dot} Br(Z {yields} l{sup +}l{sup {minus}}). Assuming standard model couplings, this result is used to determine the width of the W bosom and to set a limit on the decay W{sup +} {yields} t{bar b}.

Quintas, P.Z.; D0 Collaboration

1994-09-01T23:59:59.000Z

448

Excess Dark Currents and Transients in Thin-Film CdTe Solar Cells: Implications for Cell Stability and Encapsulation of Scribe Lines and Cell Ends in Modules  

DOE Green Energy (OSTI)

We have isolated a non-linear, metastable, shunt-path failure mechanism located at the CdS/CdTe cell edge. In such cases, most performance loss, usually erratic, can be associated with the shunt path. We studied these shunt paths using dark current-transients and infrared (ir) imaging and find only one shunt path per cell and only at the cell corner wall, even in badly degraded cells. The effect on diminishing the cell's efficiency far exceeds what would be expected from the cell's linear shunt-resistance value. We propose that current transients and ir imaging be used as a ''fingerprint'' of the source and magnitude of excess currents to evaluate the contribution of scribe-line edges and cell ends in thin-film module performance and degradation due to environmental stress. Protection afforded by, or contamination due to, new or currently used encapsulants can then be evaluated.

McMahon, T. J.; Berniard, T. J.; Albin, D. S.; Demtsu, S. H.

2005-02-01T23:59:59.000Z

449

HUMAN MACHINE INTERFACE (HMI) EVALUATION OF ROOMS TA-50-1-60/60A AT THE RADIOACTIVE LIQUID WASTE TREATMENT FACILITY (RLWTF)  

Science Conference Proceedings (OSTI)

This effort addressed an evaluation of human machine interfaces (HMIs) in Room TA-50-1-60/60A of the Radioactive Liquid Waste Treatment Facility (RLWTF). The evaluation was performed in accordance with guidance outlined in DOE-STD-3009, DOE Standard Preparation Guide for U.S. Department of Energy Nonreactor Nuclear Facility Documented Safety Analyses, 2006 [DOE 2006]. Specifically, Chapter 13 of DOE 2006 highlights the 10 CFR 830, Nuclear Safety Management, 2012, [CFR 2012] and DOE G 421.1-2 [DOE 2001a] requirements as they relate to the human factors process and, in this case, the safety of the RLWTF. The RLWTF is a Hazard Category 3 facility and, consequently, does not have safety-class (SSCs). However, safety-significant SSCs are identified. The transuranic (TRU) wastewater tanks and associated piping are the only safety-significant SSCs in Rooms TA-50-1-60/60A [LANL 2010]. Hence, the human factors evaluation described herein is only applicable to this particular assemblage of tanks and piping.

Gilmore, Walter E. [Los Alamos National Laboratory; Stender, Kerith K. [Los Alamos National Laboratory

2012-08-29T23:59:59.000Z

450

Overcoming degradation mechanisms in CdTe solar cells: First annual report, August 1998--August 1999  

DOE Green Energy (OSTI)

The authors have studied the importance of chemical processes for the stability of CdTe solar cells, in particular, diffusion in the ohmic contact/absorber junction regions. Both whole cells and test systems containing only the ohmic contact and the absorber are used. They found several experimental methods to be useable tools to follow the effects of impurity diffusion on the CdTe grain boundaries, grain bulk, and surface. In addition, they have explored alternative contacting schemes. The first year of activities led to the following tentative conclusions: Grain boundaries in CdTe/CdS cells are NOT fully passivated and are expected to be electrically active; There appears to be fast ionic diffusion in the vicinity of the Cu/HgTe/graphite back-contact, possibly enhanced by grain boundary diffusion; The macroscopic response to stress is different for cells with identical back-contact, but from different manufacturers. Different factors and/or different reactions to identical factors are possibly at work here; and Ni-P appears to be a promising back-contact material.

Cahen, D.; Gartsman, K.; Hodes, G.; Rotlevy, O.; Visoly-Fisher, I,; Dobson, K.

2000-02-28T23:59:59.000Z

451

Results from a search for the 0 {nu}{beta}{beta}-decay of {sup 130}Te  

SciTech Connect

A detailed description of the CUORICINO {sup 130}Te neutrinoless double-beta (0 {nu}{beta}{beta}) decay experiment is given and recent results are reported. CUORICINO is an array of 62 tellurium oxide (TeO{sub 2}) bolometers with an active mass of 40.7 kg. It is cooled to {approx}8-10 mK by a dilution refrigerator shielded from environmental radioactivity and energetic neutrons. It is running in the Laboratori Nazionali del Gran Sasso (LNGS) in Assergi, Italy. These data represent an exposure of 11.83 kg yr or 91 mole-years of {sup 130}Te. No evidence for 0 {nu}{beta}{beta}-decay was observed and a limit of T{sub 1/2}{sup 0} {sup {nu}}({sup 130}Te){>=}3.0x10{sup 24} y (90% CL) is set. This corresponds to an upper limit on the effective mass, , between 0.19 and 0.68 eV when analyzed with the many published nuclear structure calculations. In the context of these nuclear models, the values fall within the range corresponding to the claim of evidence of 0 {nu}{beta}{beta}-decay by H. V. Klapdor-Kleingrothaus et al. The experiment continues to acquire data.

Arnaboldi, C.; Brofferio, C.; Capelli, S.; Clemenza, M.; Fiorini, E.; Nucciotti, A.; Pavan, M.; Sisti, M. [Dipartimento di Fisica dell'Universita di Milano-Bicocca, I-20126 Milano (Italy); Sezione INFN di Milano-Bicocca, I-20126 Milano (Italy); Artusa, D. R.; Avignone III, F. T.; Bandac, I.; Creswick, R. J.; Farach, H. A.; Rosenfeld, C. [Department of Physics and Astronomy, University of South Carolina, Columbia, SC 29208 (United States); Balata, M.; Bucci, C.; Giachero, A.; Gorla, P.; Nisi, S. [INFN Laboratori Nazionali del Gran Sasso, I-67010, Assergi (L'Aquila) (Italy); Barucci, M. [Dipartimento di Fisica dell'Universita di Firenze, I-50019 Firenze (Italy); Sezione INFN di Firenze, I-50019, Firenze (Italy)] (and others)

2008-09-15T23:59:59.000Z

452

Physical properties of Ce3-xTe4 below room temperature  

Science Conference Proceedings (OSTI)

The physical properties of polycrystalline Ce{sub 3-x}Te{sub 4} were investigated by measurements of the thermoelectric properties, Hall coefficient, heat capacity, and magnetization. The fully filled, metallic x = 0 compound displays a soft ferromagnetic transition near 4 K, and analysis of the corresponding heat capacity anomaly suggests a doublet ground state for Ce{sup 3+}. The transition is suppressed to below 2 K in the insulating x = 0.33 composition, revealing that magnetic order in Ce{sub 3-x}Te{sub 4} is driven by a Ruderman-Kittel-Kasuya-Yosida (RKKY)-type interaction. The thermoelectric properties trend with composition as expected from simple electron counting, and the transport properties in Ce{sub 3}Te{sub 4} are observed to be similar to those in La{sub 3}Te{sub 4}. Trends in the low-temperature thermal conductivity data reveal that the phonons are efficiently scattered by electrons, while all compositions examined have a lattice thermal conductivity near 1.2 W/m K{sup -1} at 200 K.

May, Andrew F [ORNL; McGuire, Michael A [ORNL; Cantoni, Claudia [ORNL; Sales, Brian C [ORNL

2012-01-01T23:59:59.000Z

453

Degradation and Capacitance-Voltage Hysteresis in CdTe Devices: Preprint  

DOE Green Energy (OSTI)

CdS/CdTe cells on CTO/ZTO TCO show greater intial performance than SnO2-gased substrates due to superior optical and electrical properties of the oxide layers and more rigorous CdCl2 processing. Performance unfiormity was a problem.

Albin, D. S.; Dhere, R. G.; Glynn, S. C.; DelCueto, J.; Metzger W. K.

2009-07-01T23:59:59.000Z

454

Room-temperature oxygen sensitization in highly textured, nanocrystalline PbTe films: A mechanistic study  

E-Print Network (OSTI)

In this paper, we report large mid-wave infrared photoconductivity in highly textured, nanocrystalline PbTe films thermally evaporated on Si at room temperature. Responsivity as high as 25 V/W is measured at the 3.5 ?m ...

Wang, Jianfei

455

Appendix B: CArBon dioxide CApture teChnology SheetS  

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

B-54 Pre-Combustion membranes u.s. DePartment of energy aDvanCeD Carbon DioxiDe CaPture r&D Program: teChnology uPDate, may 2013 aDvanCeD hyDrogen transPort membranes for Coal...

456

Search for supersymmetric charged Higgs bosons at the TeVatron  

SciTech Connect

The data collected at the TeVatron RunIIa have been used to look for supersymmetric charged Higgs boson and Left-Right suspersymmetric doubly charged Higgs boson. No signal of such bosons has been found and this note reports on the current analyses and their observed excluded domains in models parameter space.

Grenier, Gerald; /Lyon, IPN

2007-10-01T23:59:59.000Z

457

Search for supersymmetric charged Higgs bosons at the TeVatron  

E-Print Network (OSTI)

The data collected at the TeVatron RunIIa have been used to look for supersymmetric charged Higgs boson and Left-Right suspersymmetric doubly charged Higgs boson. No signal of such bosons has been found and this note reports on the current analyses and their observed excluded domains in models parameter space.

Gerald Grenier

2007-10-03T23:59:59.000Z

458

Search for supersymmetric charged Higgs bosons at the TeVatron  

E-Print Network (OSTI)

The data collected at the TeVatron RunIIa have been used to look for supersymmetric charged Higgs boson and Left-Right suspersymmetric doubly charged Higgs boson. No signal of such bosons has been found and this note reports on the current analyses and their observed excluded domains in models parameter space.

Grenier, Gerald

2007-01-01T23:59:59.000Z

459

Accelerated Stress Testing and Diagnostic Analysis of Degradation in CdTe Solar Cells  

DOE Green Energy (OSTI)

The primary goal of this study was to ascertain the presence and types of mechanisms affecting CdS/CdTe device stability in the temperature range of 60 to 120 ..deg..C. It should be noted that the results presented were specific to cells made using the specific growth conditions described.

Albin, D. S.

2008-11-01T23:59:59.000Z

460

Comparison of Minority Carrier Lifetime Measurements in Superstrate and Substrate CdTe PV Devices: Preprint  

DOE Green Energy (OSTI)

We discuss typical and alternative procedures to analyze time-resolved photoluminescence (TRPL) measurements of minority carrier lifetime (MCL) with the hope of enhancing our understanding of how this technique may be used to better analyze CdTe photovoltaic (PV) device functionality. Historically, TRPL measurements of the fast recombination rate (t1) have provided insightful correlation with broad device functionality. However, we have more recently found that t1 does not correlate as well with smaller changes in device performance, nor does it correlate well with performance differences observed between superstrate and substrate CdTe PV devices. This study presents TRPL data for both superstrate and substrate CdTe devices where both t1 and the slower TRPL decay (t2) are analyzed. The study shows that changes in performance expected from small changes in device processing may correlate better with t2. Numerical modeling further suggests that, for devices that are expected to have similar drift field in the depletion region, effects of changes in bulk MCL and interface recombination should be more pronounced in t2. Although this technique may provide future guidance to improving CdS/CdTe device performance, it is often difficult to extract statistically precise values for t2, and therefore t2 data may demonstrate significant scatter when correlated with performance parameters.

Gessert, T. A.; Dhere, R. G.; Duenow, J. N.; Kuciauskas, D.; Kanevce, A.; Bergeson, J. D.

2011-07-01T23:59:59.000Z

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