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Note: This page contains sample records for the topic "ultramar diamond shamrock" 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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1

Diamond Shamrock nears completion of major expansions  

SciTech Connect

With completion later this year of a second refined products line into Colorado, Diamond Shamrock Inc., San Antonio, will have added more than 600 miles of product and crude-oil pipeline on its system and expanded charge and production capacities at its two state-of-the-art refineries, all within 30 months. The projects aim at improving the company's ability to serve markets in the U.S. Southwest and increasing capacities and flexibility at its two refineries. The paper describes these projects under the following headings: new products service; another new line; and refineries, crude pipelines; Three Rivers expansion and Supplies for McKee.

True, W.R.

1993-05-24T23:59:59.000Z

2

U.S. Energy Information Administration - EIA - Independent ...  

U.S. Energy Information Administration (EIA)

Amoco, Arco, Conoco, Duke, Farmland, Jayhawk, Koch, Mobil, Natural Gas Clearinghouse, Ozark, Seaway, Shell, Sun, Texaco, Ultramar-Diamond Shamrock.

3

Shamrock Lakes, Indiana: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

with form History Share this page on Facebook icon Twitter icon Shamrock Lakes, Indiana: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates...

4

Genealogy of major U.S. refiners  

U.S. Energy Information Administration (EIA) Indexed Site

of major U.S. refiners of major U.S. refiners 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 Amoco SOHIO BP ARCO Mapco Williams Clark Refining 1/89 12/98 4/00 3/98 Orion Diamond Shamrock Ultramar k 12/96 7/03 Ultramar Diamond Shamrock (UDS) Total North America UDS 9/97 Valero Salomon (Basis) Valero Williams BP BP b BP-Husky Refining LLC (jv) Husky Huntway 5/97 6/01 9/05 Valero Premcor g Valero Valero Valero 12/01 7/94 e 12/98 f Carlyle Group y Coastal 3/03 d 12/88 a 6/01 o Sun Company Sunoco v 7/07 i 4/08 c 5/04 h Pacific Refining (jv) 12/88 r El Paso 1/04 w 10/98 m 6/00 n 9/89 t 8/94 u See notes, footnotes, and source notes below. PBF Energy 6/10 p 12/10 q 3/11 x 10/11 j 9/00 l 1/01 s Genealogy of major U.S. refiners (continued) 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013

5

Microsoft PowerPoint - genealogy of major US refiners (00 to 09).ppt  

U.S. Energy Information Administration (EIA) Indexed Site

Of Major U.S. Refiners Of Major U.S. Refiners 2001 2004 2005 2006 2000 2002 Diamond Shamrock Ultramar j 6/01 12/01 9/97 12/96 Total North America Valero Salomon (Basis) Huntway Valero Valero Ultramar Diamond Shamrock (UDS) UDS 5/97 Notes, footnotes, and source notes are at the bottom of these figures. 2003 Clark Refining g 9/05 Valero Valero 3/98 Mapco Williams Williams Companies d 3/03 d Premcor h 1/89 4/00 12/98 BP America BP Amoco ARCO BP America SOHIO BP America b Sun Company Sunoco r 1/04 o El Paso 1/01 Pacific Refining (jv) Coastal Orion Valero 7/03 6/01 o El Paso 12/88 n 2007 2008 2009 BP-Husky Refining LLC (jv) Husky 7/07 i 4/08 c 10/98 l 8/94 q 9/89 p 12/88 a 7/94 e 12/98 f 6/00 m 9/00 k 5/04 g Holly 6/03 s 6/09 t 12/09 u Holly Genealogy Of Major U.S. Refiners (continued) 2001 2004 2005 2006 2000 2002 2003 2007 2008 2009 1/98 USX (Marathon) 10/98 y Ashland Marathon Lyondell

6

Richard Diamond  

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

PDF (1.02 MB) 2011 Diamond, Richard C.. "The California Statewide Strategic Plan for Energy Efficiency." In The California Statewide Strategic Plan for Energy Efficiency....

7

Diamond fiber field emitters  

DOE Patents (OSTI)

A field emission electron emitter comprising an electrode formed of at least one diamond, diamond-like carbon or glassy carbon composite fiber, said composite fiber having a non-diamond core and a diamond, diamond-like carbon or glassy carbon coating on said non-diamond core, and electronic devices employing such a field emission electron emitter.

Blanchet-Fincher, Graciela B. (Wilmington, DE); Coates, Don M. (Santa Fe, NM); Devlin, David J. (Los Alamos, NM); Eaton, David F. (Wilmington, DE); Silzars, Aris K. (Landenburg, PA); Valone, Steven M. (Santa Fe, NM)

1996-01-01T23:59:59.000Z

8

Advanced Diamond Anvil Techniques (Customized Diamond Anvils)  

Science Conference Proceedings (OSTI)

A complete set of diamond-based fabrication tools now exists for making a wide range of different types of diamond anvils which are tailored for various high-P applications. Current tools include: CVD diamond deposition (making diamond); Diamond polishing, laser drilling, plasma etching (removal of diamond); and Lithography, 3D laser pantography (patterning features onto diamond); - Metal deposition (putting electrical circuits and metal masks onto diamond). Current applications include the following: Electrical Conductivity; Magnetic Susceptibility; and High-P/High-T. Future applications may include: NMR; Hall Effect; de Haas - Shubnikov (Fermi surface topology); Calorimetry; and thermal conductivity.

Weir, S

2009-02-11T23:59:59.000Z

9

Electrically conductive diamond electrodes  

DOE Patents (OSTI)

An electrically conductive diamond electrode and process for preparation thereof is described. The electrode comprises diamond particles coated with electrically conductive doped diamond preferably by chemical vapor deposition which are held together with a binder. The electrodes are useful for oxidation reduction in gas, such as hydrogen generation by electrolysis.

Swain, Greg (East Lansing, MI); Fischer, Anne (Arlington, VA),; Bennett, Jason (Lansing, MI); Lowe, Michael (Holt, MI)

2009-05-19T23:59:59.000Z

10

Thermally stable diamond brazing  

DOE Patents (OSTI)

A cutting element and a method for forming a cutting element is described and shown. The cutting element includes a substrate, a TSP diamond layer, a metal interlayer between the substrate and the diamond layer, and a braze joint securing the diamond layer to the substrate. The thickness of the metal interlayer is determined according to a formula. The formula takes into account the thickness and modulus of elasticity of the metal interlayer and the thickness of the TSP diamond. This prevents the use of a too thin or too thick metal interlayer. A metal interlayer that is too thin is not capable of absorbing enough energy to prevent the TSP diamond from fracturing. A metal interlayer that is too thick may allow the TSP diamond to fracture by reason of bending stress. A coating may be provided between the TSP diamond layer and the metal interlayer. This coating serves as a thermal barrier and to control residual thermal stress.

Radtke, Robert P. (Kingwood, TX)

2009-02-10T23:59:59.000Z

11

Diamond tool machining of materials which react with diamond  

DOE Patents (OSTI)

Apparatus for the diamond machining of materials which detrimentally react with diamond cutting tools in which the cutting tool and the workpiece are chilled to very low temperatures. This chilling halts or retards the chemical reaction between the workpiece and the diamond cutting tool so that wear rates of the diamond tool on previously detrimental materials are comparable with the diamond turning of materials which do not react with diamond.

Lundin, Ralph L. (Los Alamos, NM); Stewart, Delbert D. (Los Alamos, NM); Evans, Christopher J. (Gaithersburg, MD)

1992-01-01T23:59:59.000Z

12

Diamond nucleation using polyethene  

DOE Patents (OSTI)

The invention presents a simple, non-destructive and non-abrasive method of diamond nucleation using polyethene. It particularly describes the nucleation of diamond on an electrically viable substrate surface using polyethene via chemical vapor deposition (CVD) technique in a gaseous environment.

Morell, Gerardo; Makarov, Vladimir; Varshney, Deepak; Weiner, Brad

2013-07-23T23:59:59.000Z

13

PROCESS FOR COLORING DIAMONDS  

DOE Patents (OSTI)

A process is given for coloring substantially colorless diamonds in the blue to blue-green range and comprises the steps of irradiating the colorless diamonds with electrons having an energy within the range 0.5 to 2 Mev to obtain an integrated electron flux of between 1 and 2 x 10/sup 18/ thc diamonds may be irradiated 1 hr when they take on a blue color with a slight green tint: After being heated at about 500 deg C for half an hour they become pure blue. Electrons within this energy range contam sufficient energy to displace the diamond atoms from their normal lattice sites into interstitial sites, thereby causing the color changes.

Dugdale, R.A.

1960-07-19T23:59:59.000Z

14

Diamond Schottky barrier diodes  

E-Print Network (OSTI)

. With superior physical and electrical properties, diamond became a potential competitor to SiC soon after Element Six reported in 2002 the successful synthesis of single crystal plasma deposited diamond with high catTier mobility. This thesis discusses... the fabrication of silicon thyristors able to block more than 5000V and to conduct 2000A when forward-biased. However, due to their bipolar conduction mechanism, these devices suffered from serious limitations in terms of high frequency operation [2...

Brezeanu, Mihai

2008-03-11T23:59:59.000Z

15

Diamond-graphite field emitters  

DOE Patents (OSTI)

A field emission electron emitter comprising an electrode of diamond and a conductive carbon, e.g., graphite, is provided.

Valone, Steven M. (Santa Fe, NM)

1997-01-01T23:59:59.000Z

16

Lower pressure synthesis of diamond material  

DOE Patents (OSTI)

Methods of synthesizing a diamond material, particularly nanocrystalline diamond, diamond-like carbon and bucky diamond are provided. In particular embodiments, a composition including a carbon source, such as coal, is subjected to addition of energy, such as high energy reactive milling, producing a milling product enriched in hydrogenated tetrahedral amorphous diamond-like carbon compared to the coal. A milling product is treated with heat, acid and/or base to produce nanocrystalline diamond and/or crystalline diamond-like carbon. Energy is added to produced crystalline diamond-like carbon in particular embodiments to produce bucky diamonds.

Lueking, Angela (State College, PA); Gutierrez, Humberto (State College, PA); Narayanan, Deepa (Redmond, WA); Burgess Clifford, Caroline E. (State College, PA); Jain, Puja (King Of Prussia, PA)

2010-07-13T23:59:59.000Z

17

Black Diamond Internal network  

E-Print Network (OSTI)

?? ? ??Ð ? ? ? ?? ?????Ð ´? µ Ð ? Ð ?? ? ? ?? #12;Black Diamond Internet 123456 789101112 A B 12x 6x

Imperial College, London

18

New waste-heat refrigeration unit cuts flaring, reduces pollution  

Science Conference Proceedings (OSTI)

Planetec Utility Services Co. Inc. and Energy Concepts Co. (ECC), with the help of the US Department of Energy (DOE), developed and commissioned a unique waste-heat powered LPG recovery plant in August 1997 at the 30,000 b/d Denver refinery, operated by Ultramar Diamond Shamrock (UDS). This new environmentally friendly technology reduces flare emissions and the loss of salable liquid-petroleum products to the fuel-gas system. The waste heat ammonia absorption refrigeration plant (Whaarp) is the first technology of its kind to use low-temperature waste heat (295 F) to achieve sub-zero refrigeration temperatures ({minus}40 F) with the capability of dual temperature loads in a refinery setting. The ammonia absorption refrigeration is applied to the refinery`s fuel-gas makeup streams to condense over 180 b/d of salable liquid hydrocarbon products. The recovered liquid, about 64,000 bbl/year of LPG and gasoline, increases annual refinery profits by nearly $1 million, while substantially reducing air pollution emissions from the refinery`s flare.

Brant, B.; Brueske, S. [Planetec Utility Services Co., Inc., Evergreen, CO (United States); Erickson, D.; Papar, R. [Energy Concepts Co., Annapolis, MD (United States)

1998-05-18T23:59:59.000Z

19

Refinery Waste Heat Ammonia Absorption Refrigeration Plant (WHAARP) Recovers LPG's and Gasoline, Saves Energy, and Reduces Air Pollution  

E-Print Network (OSTI)

A first-of-its-kind Waste Heat Ammonia Absorption Refrigeration Plant (WHAARP) was installed by Planetec Utility Services Co., Inc. in partnership with Energy Concepts Co. at Ultramar Diamond Shamrock's 30,000 barrel per day refinery in Denver, Colorado. The refrigeration unit is designed to provide refrigeration for two process units at the refinery while utilizing waste heat as the energy source. The added refrigeration capacity benefits the refinery by recovering salable products, debottlenecking process units, avoiding additional electrical demand, and reducing the refinery Energy Intensity Index. In addition, the WHAARP unit lowers air pollutant emissions by reducing excess fuel gas that is combusted in the refinery flare. A comprehensive utility and process efficiency Master Plan developed for the Denver refinery by Planetec provided the necessary platform for implementing this distinctive project. The $2.3 million WHAARP system was paid for in part by a $760,000 grant from the U.S. Department of Energy, as part of their "Industry of the Future Program". Total combined benefits are projected to be approximately $1 million/year with a 1.6 year simple payback including the grant funding.

Brant, B.; Brueske, S.; Erickson, D.; Papar, R.

1998-04-01T23:59:59.000Z

20

Conversion of fullerenes to diamond  

DOE Patents (OSTI)

A method of forming synthetic diamond on a substrate is disclosed. The method involves providing a substrate surface covered with a fullerene or diamond coating, positioning a fullerene in an ionization source, creating a fullerene vapor, ionizing fullerene molecules, accelerating the fullerene ions to energies above 250 eV to form a fullerene ion beam, impinging the fullerene ion beam on the substrate surface and continuing these steps to obtain a diamond thickness on the substrate.

Gruen, Dieter M. (1324 59th St., Downers Grove, IL 60515)

1993-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ultramar diamond shamrock" 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

Conversion of fullerenes to diamond  

DOE Patents (OSTI)

A method of forming synthetic diamond on a substrate. The method involves providing a substrate surface covered with a fullerene or diamond coating, positioning a fullerene in an ionization source, creating a fullerene vapor, ionizing fullerene molecules, accelerating the fullerene ions to energies above 250 eV to form a fullerene ion beam, impinging the fullerene ion beam on the substrate surface and continuing these steps to obtain a diamond film thickness on the substrate.

Gruen, Dieter M. (1324 59th St., Downers Grove, IL 60515)

1994-01-01T23:59:59.000Z

22

Diamond Wire Technology LLC | Open Energy Information  

Open Energy Info (EERE)

Wire Technology LLC Jump to: navigation, search Name Diamond Wire Technology LLC Place Colorado Springs, Colorado Zip 80916 Sector Solar Product US-based manufacturer of diamond...

23

High efficiency diamond solar cells  

SciTech Connect

A photovoltaic device and method of making same. A layer of p-doped microcrystalline diamond is deposited on a layer of n-doped ultrananocrystalline diamond such as by providing a substrate in a chamber, providing a first atmosphere containing about 1% by volume CH.sub.4 and about 99% by volume H.sub.2 with dopant quantities of a boron compound, subjecting the atmosphere to microwave energy to deposit a p-doped microcrystalline diamond layer on the substrate, providing a second atmosphere of about 1% by volume CH.sub.4 and about 89% by volume Ar and about 10% by volume N.sub.2, subjecting the second atmosphere to microwave energy to deposit a n-doped ultrananocrystalline diamond layer on the p-doped microcrystalline diamond layer. Electrodes and leads are added to conduct electrical energy when the layers are irradiated.

Gruen, Dieter M. (Downers Grove, IL)

2008-05-06T23:59:59.000Z

24

Method of Dehalogenation using Diamonds  

DOE Patents (OSTI)

A method for preparing olefins and halogenated olefins is provided comprising contacting halogenated compounds with diamonds for a sufficient time and at a sufficient temperature to convert the halogenated compounds to olefins and halogenated olefins via elimination reactions.

Farcasiu, Malvina; Kaufman, Phillip B.; Ladner, Edward P.; Anderson, Richard R.

1999-02-26T23:59:59.000Z

25

Amorphous-diamond electron emitter  

DOE Patents (OSTI)

An electron emitter comprising a textured silicon wafer overcoated with a thin (200 .ANG.) layer of nitrogen-doped, amorphous-diamond (a:D-N), which lowers the field below 20 volts/micrometer have been demonstrated using this emitter compared to uncoated or diamond coated emitters wherein the emission is at fields of nearly 60 volts/micrometer. The silicon/nitrogen-doped, amorphous-diamond (Si/a:D-N) emitter may be produced by overcoating a textured silicon wafer with amorphous-diamond (a:D) in a nitrogen atmosphere using a filtered cathodic-arc system. The enhanced performance of the Si/a:D-N emitter lowers the voltages required to the point where field-emission displays are practical. Thus, this emitter can be used, for example, in flat-panel emission displays (FEDs), and cold-cathode vacuum electronics.

Falabella, Steven (Livermore, CA)

2001-01-01T23:59:59.000Z

26

Corporate Productivity and Diffusion of Enduser Devices  

E-Print Network (OSTI)

Lauder 3 Ethyl 3 Exide 5 Exxon 12 Family Dollar 22 FamilyLyondell Petrochemical Exxon Mobil Texaco TesoroCentral Petroleum Diamond Shamrock Exxon Kerr McGee Lyondell

Kraemer, Kenneth L.; Gurbaxani, Viijay

1999-01-01T23:59:59.000Z

27

Method for forming diamonds from carbonaceous material  

DOE Patents (OSTI)

A method for producing diamonds is provided comprising exposing carbonaceous material to ion irradiation at ambient temperature and pressure.

Daulton, Tyrone (Slidell, LA); Lewis, Roy (Evanston, IL); Rehn, Lynn (LaGrange, IL); Kirk, Marquis (Hinsdale, IL)

2001-01-01T23:59:59.000Z

28

Method of Forming Diamonds from Carbonaceous Material  

DOE Patents (OSTI)

A method for producing diamonds is provided comprising exposing carbonaceous material to ion irradiation at ambient temperature and pressure.

Daulton, Tyrone; Lewis, Roy; Rehn, Lynn; Kirk, Marquis

1999-11-30T23:59:59.000Z

29

Diamond-silicon carbide composite and method  

DOE Patents (OSTI)

Uniformly dense, diamond-silicon carbide composites having high hardness, high fracture toughness, and high thermal stability are prepared by consolidating a powder mixture of diamond and amorphous silicon. A composite made at 5 GPa/1673K had a measured fracture toughness of 12 MPam.sup.1/2. By contrast, liquid infiltration of silicon into diamond powder at 5 GPa/1673K produces a composite with higher hardness but lower fracture toughness.

Zhao, Yusheng (Los Alamos, NM)

2011-06-14T23:59:59.000Z

30

Workshop on Diamonds for Modern Light Sources | Advanced Photon...  

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

to Argonne Committees and Contacts diamond Workshop on Diamonds for Modern Light Sources May 5 and 6, 2011 Advanced Photon Source, Argonne National Laboratory Room 401A1100...

31

Double bevel construction of a diamond anvil  

DOE Patents (OSTI)

A double or multiple bevel culet geometry is used on a diamond anvil in a high pressure cell apparatus to provide increased sample pressure and stability for a given force applied to the diamond tables. Double or multiple bevel culet geometries can also be used for sapphire or other hard crystal anvils. Pressures up to and above 5 Megabars can be reached. 8 figs.

Moss, W.C.

1988-10-11T23:59:59.000Z

32

Fluorinated diamond bonded in fluorocarbon resin  

SciTech Connect

By fluorinating diamond grit, the grit may be readily bonded into a fluorocarbon resin matrix. The matrix is formed by simple hot pressing techniques. Diamond grinding wheels may advantageously be manufactured using such a matrix. Teflon fluorocarbon resins are particularly well suited for using in forming the matrix.

Taylor, Gene W. (Los Alamos, NM)

1982-01-01T23:59:59.000Z

33

Self-composite comprised of nanocrystalline diamond and a non-diamond component useful for thermoelectric applications  

SciTech Connect

One provides nanocrystalline diamond material that comprises a plurality of substantially ordered diamond crystallites that are sized no larger than about 10 nanometers. One then disposes a non-diamond component within the nanocrystalline diamond material. By one approach this non-diamond component comprises an electrical conductor that is formed at the grain boundaries that separate the diamond crystallites from one another. The resultant nanowire is then able to exhibit a desired increase with respect to its ability to conduct electricity while also preserving the thermal conductivity behavior of the nanocrystalline diamond material.

Gruen, Dieter M. (Downers Grove, IL)

2009-08-11T23:59:59.000Z

34

Self-composite comprised of nanocrystalline diamond and a non-diamond component useful for thermoelectric applications  

SciTech Connect

One provides nanocrystalline diamond material that comprises a plurality of substantially ordered diamond crystallites that are sized no larger than about 10 nanometers. One then disposes a non-diamond component within the nanocrystalline diamond material. By one approach this non-diamond component comprises an electrical conductor that is formed at the grain boundaries that separate the diamond crystallites from one another. The resultant nanowire is then able to exhibit a desired increase with respect to its ability to conduct electricity while also preserving the thermal conductivity behavior of the nanocrystalline diamond material.

Gruen, Dieter M.

2012-09-04T23:59:59.000Z

35

Progress on diamond amplified photo-cathode  

SciTech Connect

Two years ago, we obtained an emission gain of 40 from the Diamond Amplifier Cathode (DAC) in our test system. In our current systematic study of hydrogenation, the highest gain we registered in emission scanning was 178. We proved that our treatments for improving the diamond amplifiers are reproducible. Upcoming tests planned include testing DAC in a RF cavity. Already, we have designed a system for these tests using our 112 MHz superconducting cavity, wherein we will measure DAC parameters, such as the limit, if any, on emission current density, the bunch charge, and the bunch length. The diamond-amplified photocathode, that promises to support a high average current, low emittance, and a highly stable electron beam with a long lifetime, is under development for an electron source. The diamond, functioning as a secondary emitter amplifies the primary current, with a few KeV energy, that comes from the traditional cathode. Earlier, our group recorded a maximum gain of 40 in the secondary electron emission from a diamond amplifier. In this article, we detail our optimization of the hydrogenation process for a diamond amplifier that resulted in a stable emission gain of 140. We proved that these characteristics are reproducible. We now are designing a system to test the diamond amplifier cathode using an 112MHz SRF gun to measure the limits of the emission current's density, and on the bunch charge and bunch length.

Wang, E.; Ben-Zvi, I.; Burrill, A.; Kewisch, J.; Chang, X.; Rao, T.; Smedley, J.; Wu, Q.; Muller, E.; Xin, T.

2011-03-28T23:59:59.000Z

36

Hydrogen chemisorption on diamond surfaces. Final report  

DOE Green Energy (OSTI)

Previously we demonstrated the ability to measure submonolayer quantities of surface hydrogen on insulating glasses. The present study builds on this by examining hydrogen coverages on another insulating material: the technologically important diamond (100) surface. The information to be obtained in the present study will allow us to deduce the correct structures for the diamond (100)-(1X1) and -(2X1) surface phases and provide information on the kinetics of hydrogen desorption from the (100) surface. Such experiments are essential for a complete understanding of hydrogen surface chemistry during the chemical vapor deposition of thin diamond films. This report summarizes progress made in FY93 for measuring surface hydrogen concentrations on the diamond (100) surface. Although the available LDRD resources were insufficient to finish this study in FY93, completion of the study is planned using other resources and this detailed report as a reference.

Daley, R.; Musket, R.

1994-09-01T23:59:59.000Z

37

Free energy and shock compression of diamond  

Science Conference Proceedings (OSTI)

The new approach has been developed to calculate the free energy in quasiharmonic approximation for homogeneous condensed matter. Common result has been demonstrated on an example of solid and liquid diamond at high pressures and temperatures of shock compression.

A. M. Molodets; M. A. Molodets; S. S. Nabatov

1998-01-01T23:59:59.000Z

38

Diamond growth at low substrate temperatures  

DOE Patents (OSTI)

Diamond films are deposited on silicon wafers at a temperature of less than 600{degree}C by a microwave plasma-assisted chemical vapor deposition process using methane in hydrogen as a source of carbon. 9 refs., 3 figs.

Hsu, W.L.; Tung, D.M.

1990-01-01T23:59:59.000Z

39

Diamond growth at low substrate temperatures  

DOE Patents (OSTI)

Diamond films are deposited on silicon wafers at a temperature of less than 600{degree}C by a microwave plasma-assisted chemical vapor deposition process using methane in hydrogen as a source of carbon. 9 refs., 3 figs.

Hsu, W.L.; Tung, D.M.

1990-12-31T23:59:59.000Z

40

Plasma spraying method for forming diamond and diamond-like coatings  

DOE Patents (OSTI)

A method and composition is disclosed for the deposition of a thick layer of diamond or diamond-like material. The method includes high temperature processing wherein a selected composition including at least glassy carbon is heated in a direct current plasma arc device to a selected temperature above the softening point, in an inert atmosphere, and is propelled to quickly quenched on a selected substrate. The softened or molten composition crystallizes on the substrate to form a thick deposition layer comprising at least a diamond or diamond-like material. The selected composition includes at least glassy carbon as a primary constituent and may include at least one secondary constituent. Preferably, the secondary constituents are selected from the group consisting of at least diamond powder, boron carbide (B{sub 4}C) powder and mixtures thereof. 9 figs.

Holcombe, C.E.; Seals, R.D.; Price, R.E.

1997-06-03T23:59:59.000Z

Note: This page contains sample records for the topic "ultramar diamond shamrock" 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

Plasma spraying method for forming diamond and diamond-like coatings  

DOE Patents (OSTI)

A method and composition for the deposition of a thick layer (10) of diamond or diamond-like material. The method includes high temperature processing wherein a selected composition (12) including at least glassy carbon is heated in a direct current plasma arc device to a selected temperature above the softening point, in an inert atmosphere, and is propelled to quickly quenched on a selected substrate (20). The softened or molten composition (18) crystallizes on the substrate (20) to form a thick deposition layer (10) comprising at least a diamond or diamond-like material. The selected composition (12) includes at least glassy carbon as a primary constituent (14) and may include at least one secondary constituent (16). Preferably, the secondary constituents (16) are selected from the group consisting of at least diamond powder, boron carbide (B.sub.4 C) powder and mixtures thereof.

Holcombe, Cressie E. (Farragut, TN); Seals, Roland D. (Oak Ridge, TN); Price, R. Eugene (Knoxville, TN)

1997-01-01T23:59:59.000Z

42

Argonne licenses diamond semiconductor discoveries to AKHAN Technologies |  

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

licenses diamond semiconductor discoveries to AKHAN Technologies licenses diamond semiconductor discoveries to AKHAN Technologies By Joseph Bernstein * By Jared Sagoff * March 4, 2013 Tweet EmailPrint LEMONT, Ill. - The U.S. Department of Energy's Argonne National Laboratory announced today that the laboratory has granted AKHAN Technologies exclusive diamond semiconductor application licensing rights to breakthrough low-temperature diamond deposition technology developed by Argonne's Center for Nanoscale Materials (CNM). The Argonne-developed technology allows for the deposition of nanocrystalline diamond on a variety of wafer substrate materials at temperatures as low as 400 degrees Celsius. The combination of the Argonne's low-temperature diamond technology with AKHAN's Miraj Diamond(tm) process represents the state of the art in diamond semiconductor

43

SLAC National Accelerator Laboratory - Superhard Diamond-Denting...  

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

is pressed between the flattened tips of two opposing diamonds. Scientists can shine lasers or X-rays through the transparent diamonds to observe and identify any atomic-scale...

44

Diamond Channel with Partially Separated Relays Ravi Tandon Sennur Ulukus  

E-Print Network (OSTI)

Diamond Channel with Partially Separated Relays Ravi Tandon Sennur Ulukus Department of Electrical Theory, 27(1):122­125, January 1981. [8] R. Tandon and S. Ulukus. Diamond channels with partially

Ulukus, Sennur

45

n-Type diamond and method for producing same  

DOE Patents (OSTI)

A new n-type semiconducting diamond is disclosed, which is doped with n-type dopant atoms. Such diamond is advantageously formed by chemical vapor deposition from a source gas mixture comprising a carbon source compound for the diamond, and a volatile hot wire filament for the n-type impurity species, so that the n-type impurity atoms are doped in the diamond during its formation. A corresponding chemical vapor deposition method of forming the n-type semiconducting diamond is disclosed. The n-type semiconducting diamond of the invention may be usefully employed in the formation of diamond-based transistor devices comprising pn diamond junctions, and in other microelectronic device applications.

Anderson, Richard J. (Oakland, CA)

2002-01-01T23:59:59.000Z

46

SLAC National Accelerator Laboratory - Diamond-like Coating Improves...  

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

News Feature Archive Diamond-like Coating Improves Electron Microscope Images By Mike Ross November 26, 2012 Coating the surface of a material with a single layer of diamond-like...

47

Diamond Energy Pty Ltd | Open Energy Information  

Open Energy Info (EERE)

Diamond Energy Pty Ltd Diamond Energy Pty Ltd Jump to: navigation, search Name Diamond Energy Pty Ltd Place Melbourne, Australia Zip 3124 Product Victoria based clean energy project developer. Coordinates -37.817532°, 144.967148° 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":-37.817532,"lon":144.967148,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

48

Shock Compressing Diamond to a Conducting Fluid  

Science Conference Proceedings (OSTI)

Laser generated shock reflectance data show that diamond undergoes a continuous transition from optically absorbing to reflecting between Hugoniot pressures 600diamond having a thermal population of carriers at P{sub H}{approx}600 GPa, undergoing band overlap metallization at P{sub H}{approx}1000 GPa and melting at 800

Bradley, D K; Eggert, J H; Hicks, D G; Celliers, P M; Moon, S J; Cauble, R C; Collins, G W

2004-07-29T23:59:59.000Z

49

Method of improving field emission characteristics of diamond thin films  

DOE Patents (OSTI)

A method of preparing diamond thin films with improved field emission properties. The method includes preparing a diamond thin film on a substrate, such as Mo, W, Si and Ni. An atmosphere of hydrogen (molecular or atomic) can be provided above the already deposited film to form absorbed hydrogen to reduce the work function and enhance field emission properties of the diamond film. In addition, hydrogen can be absorbed on intergranular surfaces to enhance electrical conductivity of the diamond film. The treated diamond film can be part of a microtip array in a flat panel display.

Krauss, Alan R. (Naperville, IL); Gruen, Dieter M. (Downer Grove, IL)

1999-01-01T23:59:59.000Z

50

Diamond Shaving of Contaminated Concrete Surfaces  

Science Conference Proceedings (OSTI)

Decommissioning and decontamination of existing facilities presents technological challenges. One major challenge is the removal of surface contamination from concrete floors and walls while eliminating the spread of contamination and volumetric reduction of the waste stream. Numerous methods have been tried with a varying degree of success. Recent technology has made this goal achievable and has been used successfully. This new technology is the Diamond Floor Shaver and Diamond Wall shaver. The Diamond Floor Shaver is a self-propelled, walk behind machine that literally shaves the contaminated concrete surface to specified depths. This is accomplished by using a patented system of 100 dry cutting diamond blades with offset diamond segments that interlock to provide complete shaving of the concrete surface. Grooves are eliminated which allows for a direct frisk reading to analyze results. When attached to an appropriate size vacuum, the dust produced is 100% contained. Dust is collected in drums ready for disposition and disposal. The waste produced in shaving 7,500 square feet at 1/8 inch thickness would fill a single 55 gallon drum. Production is dependent on depth of shaving but averages 100 square feet per hour. The wall shaver uses the same patented diamond drum and blades but is hydraulically driven and is deployed using a robotic arm allowing its operation to be to totally remote. It can reach ceilings as high as 20 feet. Numerous small projects were successfully completed using this technology. Large scale deployment came in 2003. Bluegrass, in conjunction with Bartlett Services, deployed this technology to support decontamination activities for closing of the Rocky Flats nuclear weapons site. Up to six floor shavers and one wall shaver were deployed in buildings B371 and B374. These buildings had up to one half-inch, fixed plutonium and beryllium contamination. Hundred-thousands of square feet of floors and walls were shaved successfully to depths of up to one half inch. Decontamination efforts were so successful the balance of the buildings could be demolished using conventional methods. The shavers helped keep the project on schedule while the vacuum system eliminated the potential for contaminants becoming airborne.

Mullen, Lisa K. [Bluegrass Concrete Cutting Inc., 107 Mildred Street PO Box 427, Greenville, Alabama 36037 (United States)

2008-01-15T23:59:59.000Z

51

Diamonds are an Electronic Device's Best Friend | Department of Energy  

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

Diamonds are an Electronic Device's Best Friend Diamonds are an Electronic Device's Best Friend Diamonds are an Electronic Device's Best Friend April 17, 2012 - 11:43am Addthis Ultrananocrystalline diamond has a diverse range of applications from the next generation of high-definition flat panel displays to coatings for mechanical pump seals and tools. | Photo courtesy of Argonne National Lab Ultrananocrystalline diamond has a diverse range of applications from the next generation of high-definition flat panel displays to coatings for mechanical pump seals and tools. | Photo courtesy of Argonne National Lab Charles Rousseaux Charles Rousseaux Senior Writer, Office of Science How does it work? As computer performance has improved, engineers have had a hard time dissipating the heat produced. Diamond film may be the answer, as it's much better at absorbing and

52

Diamond Walnut Biomass Facility | Open Energy Information  

Open Energy Info (EERE)

Walnut Biomass Facility Walnut Biomass Facility Jump to: navigation, search Name Diamond Walnut Biomass Facility Facility Diamond Walnut Sector Biomass Location San Joaquin County, California Coordinates 37.9175935°, -121.1710389° 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":37.9175935,"lon":-121.1710389,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

53

Diamond Willow Extension | Open Energy Information  

Open Energy Info (EERE)

Extension Extension Jump to: navigation, search Name Diamond Willow Extension Facility Diamond Willow Extension Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Montana-Dakota Utilities Developer Montana-Dakota Utilities Energy Purchaser Montana-Dakota Utilities Location Near Baker MT Coordinates 46.281621°, -104.271355° 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":46.281621,"lon":-104.271355,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

54

Comparison of Fast Amplifiers for Diamond Detectors  

E-Print Network (OSTI)

The development of Chemical Vapour Deposition (CVD) diamond detectors requests for novel signal amplifiers, capable to match the superb signal-to-noise ratio and timing response of these detectors. Existing amplifiers are still far away from this goal and are the dominant contributors to the overall system noise and the main source of degradation of the energy and timing resolution. We tested a number of commercial amplifiers designed for diamond detector readout to identify the best solution for a particular application. This application required a deposited energy threshold below 100 keV and timing resolution of the order of 200 ps at 200 keV. None of tested amplifiers satisfies these requirements. The best solution to such application found to be the Cividec C6 amplifier, which allows 100 keV minimal threshold, but its coincidence timing resolution at 200 keV is as large as 1.2 ns.

M. Osipenko; S. Minutoli; P. Musico; M. Ripani; B. Caiffi; A. Balbi; G. Ottonello; S. Argir; S. Beol; N. Amapane; M. Masera; G. Mila

2013-10-03T23:59:59.000Z

55

Challenges in Applying Diamond Coatings to Carbide Twist Drills  

Science Conference Proceedings (OSTI)

Despite of the attractive advantage of applying diamond coating to drills, ... Investigation of a Hybrid Cutting Tool Design for Shearing Operations of Sheet Metals.

56

Boron-doped Diamond Synthesis Using Mode-conversion Type ...  

Science Conference Proceedings (OSTI)

DC Arc Plasma Jet Growth of Large Area High Quality Freestanding Diamond Films and ... Hybrid Nanoporous Metal/Oxide Films for Energy Storage.

57

Systems in Commercial Buildings" Project Rick Diamond, Craig...  

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

the PIER "Thermal Distribution Systems in Commercial Buildings" Project Rick Diamond, Craig Wray, Brian Smith, Darryl Dickerhoff, Nance Matson, and Skylar Cox Indoor Environment...

58

Argonne CNM News: Medical applications of diamond particles and...  

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

Medical applications of diamond particles and surfaces TEM image of nanodiamond particles TEM image of nanodiamond particles Scientists in the Nanofabrication & Devices Group...

59

Argonne CNM News: Ultrananocrystalline Diamond-Coated Membranes...  

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

Ultrananocrystalline Diamond-Coated Membranes Show Promise for Medical Implant Applications SEM image of UNCD coated AAO membrane SEM image of AAO membrane coated with tungsten...

60

Alloy Development for Copper Diamond Composites for Thermal ...  

Science Conference Proceedings (OSTI)

One approach to meeting the challenges is to add diamond particles to a copper matrix to improve thermal conductivity and lower CTE simultaneously.

Note: This page contains sample records for the topic "ultramar diamond shamrock" 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

Synthesis and characterization of a nanocrystalline diamond aerogel  

E-Print Network (OSTI)

nanocrystalline diamond aerogel Peter J. Pauzauskie a,1,2 ,Laboratory, Berkeley, CA 94720 Aerogel materials have myriadcreating a nanodiamond aerogel matrix has remained an

Pauzauskie, Peter J.

2012-01-01T23:59:59.000Z

62

Thin Sheet of Diamond Has Worlds of Uses  

DOE R&D Accomplishments (OSTI)

A new technique from Argonne National Laboratory creates thin diamond films that are helping industry save energy and could even be used in heart and eye implants.

Sagoff, Jared

2011-04-01T23:59:59.000Z

63

Black Diamond Power Co | Open Energy Information  

Open Energy Info (EERE)

Black Diamond Power Co Black Diamond Power Co Place West Virginia Utility Id 1764 Utility Location Yes Ownership I NERC Location RFC NERC RFC Yes Activity Distribution Yes References EIA Form EIA-861 Final Data File for 2010 - File1_a[1] Energy Information Administration Form 826[2] LinkedIn Connections CrunchBase Profile No CrunchBase profile. Create one now! This article is a stub. You can help OpenEI by expanding it. Utility Rate Schedules Grid-background.png No rate schedules available. Average Rates Residential: $0.1200/kWh Commercial: $0.0685/kWh The following table contains monthly sales and revenue data for Black Diamond Power Co (West Virginia). Month RES REV (THOUSAND $) RES SALES (MWH) RES CONS COM REV (THOUSAND $) COM SALES (MWH) COM CONS IND_REV (THOUSAND $) IND SALES (MWH) IND CONS OTH REV (THOUSAND $) OTH SALES (MWH) OTH CONS TOT REV (THOUSAND $) TOT SALES (MWH) TOT CONS

64

NEW HIGH STRENGTH AND FASTER DRILLING TSP DIAMOND CUTTERS  

Science Conference Proceedings (OSTI)

The manufacture of thermally stable diamond (TSP) cutters for drill bits used in petroleum drilling requires the brazing of two dissimilar materials--TSP diamond and tungsten carbide. The ENDURUS{trademark} thermally stable diamond cutter developed by Technology International, Inc. exhibits (1) high attachment (shear) strength, exceeding 345 MPa (50,000 psi), (2) TSP diamond impact strength increased by 36%, (3) prevents TSP fracture when drilling hard rock, and (4) maintains a sharp edge when drilling hard and abrasive rock. A novel microwave brazing (MWB) method for joining dissimilar materials has been developed. A conventional braze filler metal is combined with microwave heating which minimizes thermal residual stress between materials with dissimilar coefficients of thermal expansion. The process results in preferential heating of the lower thermal expansion diamond material, thus providing the ability to match the thermal expansion of the dissimilar material pair. Methods for brazing with both conventional and exothermic braze filler metals have been developed. Finite element modeling (FEM) assisted in the fabrication of TSP cutters controllable thermal residual stress and high shear attachment strength. Further, a unique cutter design for absorbing shock, the densification of otherwise porous TSP diamond for increased mechanical strength, and diamond ion implantation for increased diamond fracture resistance resulted in successful drill bit tests.

Robert Radtke

2006-01-31T23:59:59.000Z

65

The Phase I MX Beamlines at Diamond Light Source  

Science Conference Proceedings (OSTI)

Three beamlines dedicated to macromolecular crystallography, I02, I03 and I04 at Diamond Light Source are presented. These beamlines formed the life science component of Phase 1 of Diamond Light Source. The article provides details of the design and the current status of the beamlines.

Duke, E. M. H.; Evans, G.; Flaig, R.; Hall, D. R.; Latchem, M.; McAuley, K. E.; Sandy, D. J.; Sorensen, T. L-M.; Waterman, D.; Johnson, L. N. [Diamond Light Source, Harwell Science and Innovation Campus, Didcot, Oxon. OX11 0DE (United Kingdom)

2010-06-23T23:59:59.000Z

66

Diamond and Related Materials 6 ( 1997) 1759-I771 Simulation of morphological instabilities during diamond  

E-Print Network (OSTI)

, and hydrogen are activated with energetic sources such as microwaves to generate plasmas, direct current (DC include the hot filament [2] and many types of microwave plasma [3], which typically have *Corresponding is expected to be negligible since the diamond phase of carbon is very stable and gasification of dia- mond

Dandy, David

67

Nonlinear optical spectroscopy of diamond surfaces  

DOE Green Energy (OSTI)

Second harmonic generation (SHG) and infrared-visible sum frequency generation (SFG) spectroscopies have been shown to be powerful and versatile for studying surfaces with submonolayer sensitivity. They have been used in this work to study bare diamond surfaces and molecular adsorption on them. In particular, infrared-visible SFG as a surface vibrational spectroscopic technique has been employed to identify and monitor in-situ surface bonds and species on the diamond (111) surface. The CH stretch spectra allow us to investigate hydrogen adsorption, desorption, abstraction, and the nature of the hydrogen termination. The C(111) surface dosed with atomic hydrogen was found to be in a monohydride configuration with the hydrogen atoms situated at top-sites. The ratio of the abstraction rate to the adsorption rate was appreciable during atomic hydrogen dosing. Kinetic parameters for thermal desorption of H on C(111) were determined showing a near first-order kinetics. For the fully H-terminated (111) surface, a large (110 cm{sup {minus}1}) anharmonicity and {approximately}19 psec lifetime were measured for the first-excited CH stretch mode. The bare reconstructed C(111)-(2 {times} l) surface showed the presence of CC stretch modes which were consistent with the Pandey {pi}-bonded chain structure. When exposed to the methyl radical, the SFG spectra of the C(111) surface showed features suggesting the presence of adsorbed methyl species. After heating to sufficiently high temperatures, they were converted into the monohydride species. Preliminary results on the hydrogen-terminated diamond (100) surface are also presented.

Chin, R.P.

1995-04-01T23:59:59.000Z

68

Nano-diamonds in the Universe A.C. Andersen,1  

E-Print Network (OSTI)

Nano-diamonds in the Universe A.C. Andersen,1 H. Mutschke,2 L. Binette3 , S. Höfner4 1 NORDITA, SE-75120 Uppsala Sweden The first direct evidence for nano-diamonds in space came from meteorites. Laboratory analyses on fine-grained diamond residues from primitive meteorites have shown that nano- diamonds

Andersen, Anja C.

69

Diamond Detectors for Heavy Ion Measurements  

E-Print Network (OSTI)

In 1999, the accelerator facility at GSI is scheduled to deliver beam intensities of about 10 10 particles/spill for all available ions up to 238 U. This necessitates the development of a new generation of radiation-resistant and ultra-fast detectors, in conjunction with new high-speed and low-noise electronics. Preliminary results confirm the suitability of CVD-diamond detectors for both, beam diagnostics, and heavy-ion experiments with projectiles in the energy region from 50 MeV/amu to 2 GeV/amu. Various test measurements

E. Berdermann; K. Blasche; P. Moritz; H. Stelzer; F. Zeytouni

1998-01-01T23:59:59.000Z

70

Manufacturing of diamond windows for synchrotron radiation  

Science Conference Proceedings (OSTI)

A new diamond window construction is presented and explicit manufacturing details are given. This window will increase the power dissipation by about a factor of 4 over present day state of the art windows to absorb 600 W of power. This power will be generated by in-vacuum undulators with the storage ring ALBA operating at a design current of 400 mA. Extensive finite element (FE) calculations are included to predict the windows behavior accompanied by explanations for the chosen boundary conditions. A simple linear model was used to cross-check the FE calculations.

Schildkamp, W.; Nikitina, L. [Synchrotron ALBA, CELLS, Carretera BP 1413, km 3.3, 08290 Cerdanyola del Valles (Spain)

2012-09-15T23:59:59.000Z

71

ANL/APS/TB-24 Diamond Monochromators for APS Undulator-A Beamlines  

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

4 4 Diamond Monochromators for APS Undulator-A Beamlines R.C. Blasdell, L. A. Assoufid, and D. M. Mills TABLE OF CONTENTS 1. INTRODUCTION .................................................................................1 2. PHYSICAL PROPERTIES OF DIAMONDS ..................................................5 2.1 Varieties of Diamonds ....................................................................5 2.2 The Lattice Parameter .....................................................................5 2.3 Bulk Thermal and Mechanical Properties ...............................................6 2.4 Typical Surface and Lattice Plane Morphology ......................................8 2.5 The Liquid-GaIn/Diamond Interface ...................................................10 3. DIFFRACTION PROPERTIES OF DIAMOND

72

Printable, flexible and stretchable diamond for thermal management  

DOE Patents (OSTI)

Various heat-sinked components and methods of making heat-sinked components are disclosed where diamond in thermal contact with one or more heat-generating components are capable of dissipating heat, thereby providing thermally-regulated components. Thermally conductive diamond is provided in patterns capable of providing efficient and maximum heat transfer away from components that may be susceptible to damage by elevated temperatures. The devices and methods are used to cool flexible electronics, integrated circuits and other complex electronics that tend to generate significant heat. Also provided are methods of making printable diamond patterns that can be used in a range of devices and device components.

Rogers, John A; Kim, Tae Ho; Choi, Won Mook; Kim, Dae Hyeong; Meitl, Matthew; Menard, Etienne; Carlisle, John

2013-06-25T23:59:59.000Z

73

Epitaxial synthesis of diamond layers on a monocrystalline diamond substrate in a torch microwave plasmatron  

SciTech Connect

The epitaxial growth of a diamond single-crystal film in a torch microwave discharge excited by a magnetron of a domestic microwave oven with the power of {<=}1 kW in an argon-hydrogen-methane mixture with a high concentration of methane (up to 25% with respect to hydrogen) at atmospheric pressure on a sub-strate of a synthetic diamond single crystal (HPHP) with the orientation (100) and 4 Multiplication-Sign 4 mm in size is obtained. A discharge with the torch diameter of {approx}2 mm and the concentration of the microwave power absorbed in the torch volume of >10{sup 3} W/cm{sup 3} is shown to be effective for epitaxial enlargement of a single crystal of synthetic diamond. The structure of the deposited film with the thickness up to 10 {mu}m with high-quality morphology is investigated with an optical microscope as well as using the methods of the Raman scattering and scanning electron microscopy.

Sergeichev, K. F., E-mail: kserg@fpl.gpi.ru; Lukina, N. A. [Prokhorov Institute of General Physics (Russian Federation)

2011-12-15T23:59:59.000Z

74

Argonne CNM News: State-of-the-Art Diamond Semiconductor Technology  

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

State-of-the-Art Diamond Semiconductor Technology Licensed to AKHAN Technologies State-of-the-Art Diamond Semiconductor Technology Licensed to AKHAN Technologies The U.S. Department of Energy's Argonne National Laboratory announced today that the laboratory has granted AKHAN Technologies, Inc., exclusive diamond semiconductor application licensing rights to breakthrough low-temperature diamond deposition technology developed by Argonne's Center for Nanoscale Materials (CNM). The method allows for the deposition of nanocrystalline diamond on a variety of wafer substrate materials at temperatures as low as 400°C, highly advantageous for integration with processed semiconductor electronic materials and resulting in the deposition of low-defect nanocrystalline diamond (NCD) thin films. The combination of CNM's low-temperature diamond technology with the AKHAN Miraj Diamond(tm) process represents the state of the art in diamond semiconductor thin-film technology.

75

Diamond Green Diesel: Diversifying Our Transportation Fuel Supply |  

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

Diamond Green Diesel: Diversifying Our Transportation Fuel Supply Diamond Green Diesel: Diversifying Our Transportation Fuel Supply Diamond Green Diesel: Diversifying Our Transportation Fuel Supply January 20, 2011 - 3:48pm Addthis Jonathan Silver Jonathan Silver Executive Director of the Loan Programs Office What does this project do? Nearly triples the amount of renewable diesel produced domestically Diversifies the U.S. fuel supply Today, Secretary Chu announced the offer of a conditional commitment for a $241 million loan guarantee to Diamond Green Diesel, LLC., the DOE Loan Program's first conditional commitment for an advanced biofuels plant. The loan guarantee will support the construction of a 137-million gallon per year renewable diesel facility that will produce renewable diesel fuel primarily from animal fats, used cooking oil and other waste grease

76

Wakefield Breakdown Test of a Diamond-Loaded Accelerating Structure  

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

WAKEFIELD BREAKDOWN TEST OF A DIAMOND-LOADED ACCELERATING STRUCTURE S. Antipov, C. Jing, A. Kanareykin, P. Schoessow Euclid TechLabs LLC, Solon, OH, 44139 USA M. Conde, W. Gai, S....

77

Wakefield Breakdown Test of a Diamond-loaded Accelerating Structure...  

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

WAKEFIELD BREAKDOWN TEST OF A DIAMOND-LOADED ACCELERATING STRUCTURE AT THE AWA S. Antipov, C. Jing, P. Schoessow, J. E. Butler, S. Zuo and A. Kanareykin, Euclid Techlabs LLC,...

78

Plasma-assisted conversion of solid hydrocarbon to diamond  

DOE Patents (OSTI)

A process of preparing diamond, e.g., diamond fiber, by subjecting a hydrocarbon material, e.g., a hydrocarbon fiber, to a plasma treatment in a gaseous feedstream for a sufficient period of time to form diamond, e.g., a diamond fiber is disclosed. The method generally further involves pretreating the hydrocarbon material prior to treatment with the plasma by heating within an oxygen-containing atmosphere at temperatures sufficient to increase crosslinking within said hydrocarbon material, but at temperatures insufficient to melt or decompose said hydrocarbon material, followed by heating at temperatures sufficient to promote outgassing of said crosslinked hydrocarbon material, but at temperatures insufficient to convert said hydrocarbon material to carbon.

Valone, Steven M. (Santa Fe, NM); Pattillo, Stevan G. (Los Alamos, NM); Trkula, Mitchell (Los Alamos, NM); Coates, Don M. (Santa Fe, NM); Shah, S. Ismat (Wilmington, DE)

1996-01-01T23:59:59.000Z

79

Diamond: a storage architecture for early discard in interactive search  

Science Conference Proceedings (OSTI)

This paper explores the concept of early discard for interactive search of unindexed data. Processing data inside storage devices using downloaded searchlet code enables Diamond to perform efficient, applicationspecific filtering of large data collections. ...

Larry Huston; Rahul Sukthankar; Rajiv Wickremesinghe; M. Satyanarayanan; Gregory R. Ganger; Erik Riedel; Anastassia Ailamaki

2004-03-01T23:59:59.000Z

80

Fluorinated diamond particles bonded in a filled fluorocarbon resin matrix  

DOE Patents (OSTI)

A method of producing fluorinated diamond particles bonded in a filled fluorocarbon resin matrix. Simple hot pressing techniques permit the formation of such matrices from which diamond impregnated grinding tools and other articles of manufacture can be produced. Teflon fluorocarbon resins filled with Al/sub 2/O/sub 3/ yield grinding tools with substantially improved work-to-wear ratios over grinding wheels known in the art.

Taylor, G.W.; Roybal, H.E.

1983-11-14T23:59:59.000Z

Note: This page contains sample records for the topic "ultramar diamond shamrock" 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

Hydrogen Storage in Nano-Phase Diamond at High Temperature and Its Release  

DOE Green Energy (OSTI)

The objectives of this proposed research were: 91) Separation and storage of hydrogen on nanophase diamonds. It is expected that the produced hydrogen, which will be in a mixture, can be directed to a nanophase diamond system directly, which will not only store the hydrogen, but also separate it from the gas mixture, and (2) release of the stored hydrogen from the nanophase diamond.

Tushar K Ghosh

2008-10-13T23:59:59.000Z

82

Melting temperature of iron in the core diamond cell experiments Guoyin Shen  

E-Print Network (OSTI)

, Washington DC, 1998. 3. Boehler, R., High pressure experiments and the phase diagram of lower mantle and core. Manghnani and Y. Syono (Terra Scientific Publishing Company/American Geophysical Union, Tokyo, Washington DC materials, Rev. Geophysics, 38, 221-245, 2000. Diamond cell technique Diamond as anvil and window Diamond

Shen, Guoyin

83

BACKGROUND REVIEW OF THE BRUSH BERYLLIUM AND DIAMOND MAGNESIUM PLANTS  

Office of Legacy Management (LM)

BACKGROUND REVIEW OF THE BRUSH BERYLLIUM AND DIAMOND MAGNESIUM PLANTS BACKGROUND REVIEW OF THE BRUSH BERYLLIUM AND DIAMOND MAGNESIUM PLANTS IN LUCKEY, OHIO October 27, 1989 Prepared for: U.S. Department of Energy Formerly Utilized Sites Remedial Action Program Prepared by: R.F. Weston/Office of Technical Services BACKGROUND REVIEW OF THE BRUSH BERYLLIUM AND DIAMOND MAGNESIUM PLANTS IN LUCKEY, OHIO INTRODUCTION The Department of Energy (DOE) is conducting a program to identify and examine the radiological conditions at sites used in the early years of nuclear energy development by the U.S. Army Corps of Engineer's Manhattan Engineer District (MED) and the Atomic Energy Commission (AEC). This program, the Formerly Utilized Sites Remedial Action Program (FUSRAP), is administered by the Assistant Secretary for Nuclear Energy through the

84

Is Graphite a Diamonds Best Friend? New Information on Material  

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

November 18th, 2003 November 18th, 2003 Is Graphite a Diamond's Best Friend? New Information on Material Transformation Science has yet to achieve the alchemist's dream of turning lead into gold. But a group of re-searchers using the GeoSoilEn-viroCARS (GSECARS) and High-Pressure Collaborative Access Team (HP-CAT) facilities at the Department of Energy's Advanced Photon Source (APS) at Argonne National Laboratory, may have found a way to turn ordinary soft graphite (source of the "lead" found in pencils) into a new, super-hard material that "looks" just like diamond. Using the high-brilliance x-ray beams from the APS, the group discovered that, under extreme pressure, graphite (among the softest of materials and the source of the lead found in pencils) becomes as hard as diamond, the

85

Synthesis and characterization of a nanocrystalline diamond aerogel  

SciTech Connect

Aerogel materials have myriad scientific and technological applications due to their large intrinsic surface areas and ultralow densities. However, creating a nanodiamond aerogel matrix has remained an outstanding and intriguing challenge. Here we report the high-pressure, high-temperature synthesis of a diamond aerogel from an amorphous carbon aerogel precursor using a laser-heated diamond anvil cell. Neon is used as a chemically inert, near-hydrostatic pressure medium that prevents collapse of the aerogel under pressure by conformally filling the aerogel's void volume. Electron and X-ray spectromicroscopy confirm the aerogel morphology and composition of the nanodiamond matrix. Time-resolved photoluminescence measurements of recovered material reveal the formation of both nitrogen- and silicon- vacancy point-defects, suggesting a broad range of applications for this nanocrystalline diamond aerogel.

Pauzauskie, Peter J.; Crowhurst, Jonathan C.; Worsley, Marcus A.; Laurence, Ted A.; Kilcoyne, A. L. David; Wang, Yinmin; Willey, Trevor M.; Visbeck, Kenneth S.; Fakra, Sirine C.; Evans, William J.; Zaug, Joseph M.; Satcher, Jr., Joe H.

2011-07-06T23:59:59.000Z

86

Capacitively coupled RF diamond-like-carbon reactor  

DOE Patents (OSTI)

A process of coating a non-conductive fiber with diamond-like carbon, including passing a non-conductive fiber between a pair of parallel metal grids within a reaction chamber, introducing a hydrocarbon gas into the reaction chamber, forming a plasma within the reaction chamber for a sufficient period of time whereby diamond-like carbon is formed upon the non-conductive fiber, is provided together with a reactor chamber for deposition of diamond-like carbon upon a non-conductive fiber, including a vacuum chamber, a cathode assembly including a pair of electrically isolated opposingly parallel metal grids spaced apart at a distance of less than about 1 centimeter, an anode, a means of introducing a hydrocarbon gas into said vacuum chamber, and a means of generating a plasma within said vacuum chamber.

Devlin, David James (Los Alamos, NM); Coates, Don Mayo (Santa Fe, NM); Archuleta, Thomas Arthur (Espanola, NM); Barbero, Robert Steven (Santa Cruz, NM)

2000-01-01T23:59:59.000Z

87

Designed Diamond Ground State via Optimized Isotropic Monotonic Pair Potentials  

E-Print Network (OSTI)

We apply inverse statistical-mechanical methods to find a simple family of optimized isotropic, monotonic pair potentials, under certain constraints, whose ground states for a wide range of pressures is the diamond crystal. These constraints include desirable phonon spectra and the widest possible pressure range for stability. We also ascertain the ground-state phase diagram for a specific optimized potential to show that other crystal structures arise for other pressures. Cooling disordered configurations interacting with our optimized potential to absolute zero frequently leads to the desired diamond crystal ground state, revealing that the capture basin for the global energy minimum is large and broad relative to the local energy minima basins.

Etienne Marcotte; Frank H. Stillinger; Salvatore Torquato

2012-12-15T23:59:59.000Z

88

Nano-manipulation of diamond-based single photon sources  

E-Print Network (OSTI)

The ability to manipulate nano-particles at the nano-scale is critical for the development of active quantum systems. This paper presents a new technique to manipulate diamond nano-crystals at the nano-scale using a scanning electron microscope, nano-manipulator and custom tapered optical fibre probes. The manipulation of a ~ 300 nm diamond crystal, containing a single nitrogen-vacancy centre, onto the endface of an optical fibre is demonstrated. The emission properties of the single photon source post manipulation are in excellent agreement with those observed on the original substrate.

E. Ampem-Lassen; D. A. Simpson; B. C. Gibson; S. Trpkovski; F. M. Hossain; S. T. Huntington; K. Ganesan; L. C. L. Hollenberg; S. Prawer

2009-05-18T23:59:59.000Z

89

Nano-manipulation of diamond-based single photon sources  

E-Print Network (OSTI)

The ability to manipulate nano-particles at the nano-scale is critical for the development of active quantum systems. This paper presents a new technique to manipulate diamond nano-crystals at the nano-scale using a scanning electron microscope, nano-manipulator and custom tapered optical fibre probes. The manipulation of a ~ 300 nm diamond crystal, containing a single nitrogen-vacancy centre, onto the endface of an optical fibre is demonstrated. The emission properties of the single photon source post manipulation are in excellent agreement with those observed on the original substrate.

Ampem-Lassen, E; Gibson, B C; Trpkovski, S; Hossain, F M; Huntington, S T; Ganesan, K; Hollenberg, L C L; Prawer, S

2009-01-01T23:59:59.000Z

90

A Photo-Stimulated Low Electron Temperature High Current Diamond Film Field  

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

A Photo-Stimulated Low Electron Temperature High Current Diamond A Photo-Stimulated Low Electron Temperature High Current Diamond Film Field Emission Cathode A Photo-Stimulated Low Electron Temperature High Current Diamond Film Field Emission Cathode Nanostructure diamond cathodes can operate at relatively moderate vacuum pressures due to the inert surface/vacuum interface. September 27, 2013 A Photo-Stimulated Low Electron Temperature High Current Diamond Film Field Emission Cathode Researchers at LANL have developed a novel, ultra-high-quality, robust electron source, which uses nanostructured polycrystalline diamond in a matrix with single-walled carbon nanotubes (SWCNs). Available for thumbnail of Feynman Center (505) 665-9090 Email A Photo-Stimulated Low Electron Temperature High Current Diamond Film Field Emission Cathode

91

Abstract Moving average algorithms for diamond, hexagon, and general polygonal shaped window operations  

E-Print Network (OSTI)

This paper presents fast moving window algorithms for calculating local statistics in a diamond, hexagon, and general polygonal shaped windows of an image which is important for real-time applications. The algorithms for a diamond shaped window requires only seven or eight additions and subtractions per pixel. A fast sparse algorithm only needs four additions and subtractions for a sparse diamond shaped window. A number of other shapes of diamond windows such as skewed or parallelogram shaped diamond, long diamond, and lozenged diamond shaped, are also investigated. Similar algorithms are also developed for hexagon shaped windows. The computation for a hexagon window only needs eight additions and subtractions for each pixel. Fast algorithms for general polygonal shaped windows are also developed. The computation cost of all these algorithms is independent of the window size. A variety of synthetic and real images have been tested.

Changming Sun

2005-01-01T23:59:59.000Z

92

The Diamond Beamline Controls and Data Acquisition Software Architecture  

Science Conference Proceedings (OSTI)

The software for the Diamond Light Source beamlines[1] is based on two complementary software frameworks: low level control is provided by the Experimental Physics and Industrial Control System (EPICS) framework[2][3] and the high level user interface is provided by the Java based Generic Data Acquisition or GDA[4][5]. EPICS provides a widely used

N. Rees; Diamond Controls Group; Diamond Data Acquisition Group

2010-01-01T23:59:59.000Z

93

Fabrication of Aluminum Alloy-Based Diamond Grinding Wheel by ...  

Science Conference Proceedings (OSTI)

Moreover, ability of CFRP drilling of the aluminum alloy-based diamond grinding wheel ... Accelerated Post-Weld Natural Ageing in Ultrasonic Welding Aluminium ..... Powder Metallurgy of High Strength Al84Gd6Ni7Co3 Gas-atomized Powder.

94

Diamond Wire Saw for Precision Machining of Laser Target Components  

SciTech Connect

The fabrication of precision laser targets requires a wide variety of specialized mesoscale manufacturing techniques. The diamond wire saw developed in this study provides the capability to precisely section meso-scale workpieces mounted on the assembly stations used by the Target Fabrication Group. This new capability greatly simplifies the fabrication of many types of targets and reduces the time and cost required to build the targets. A variety of materials are used to fabricate targets, including metals, plastics with custom designed chemical formulas, and aerogels of various densities. The materials are usually provided in the form of small pieces or cast rods that must be machined to the required shape. Many of these materials, such as metals and some plastics, can be trimmed using a parting tool on a diamond turning machine. However, other materials, such as aerogels and brittle materials, cannot be adequately cut with a parting tool. In addition, the geometry of the parts often requires that the workpieces be held in a special assembly station, which excludes the use of a parting tool. In the past, these materials were sectioned using a small, handheld coping saw that used a diamond-impregnated wire as a blade. This miniature coping saw was effective, but it required several hours to cut through certain materials. Furthermore, the saw was guided by hand and often caused significant damage to fragile aerogels. To solve these problems, the diamond wire saw shown in Figure 1 was developed. The diamond wire saw is designed to machine through materials that are mounted in the Target Fabrication Group's benchtop assembly stations. These assembly stations are the primary means of aligning and assembling target components, and there is often a need to machine materials while they are mounted in the assembly stations. Unfortunately, commercially available saws are designed for very different applications and are far too large to be used with the assembly stations. Therefore, a custom diamond wire saw was designed and constructed. The diamond wire saw cuts through workpieces using a continuous loop of diamond-impregnated wire of length 840 mm. The wire loop runs around several idler pulleys and is driven by a simple geared DC motor that rotates at 17 rpm. The linear speed of the wire is 107 inches/minute. The saw is oriented at an angle of 20{sup o} from horizontal, so the operator can view the wire through the cutout at the front end of the saw. When looking through a microscope or camera with a horizontal line of sight, the operator can clearly see the wire as it cuts through the workpiece, as shown in the right side of Figure 1. The saw is mounted on a two-axis stage that allows the operator to align the wire with the workpiece. To cut through the workpiece, the operator drives the wire through the workpiece by turning the feed micrometer. An image of the interior of the diamond wire saw appears in Figure 2. This picture was taken after removing the protective cover plate from the saw.

Bono, M J; Bennett, D W

2005-08-08T23:59:59.000Z

95

Low substrate temperature deposition of diamond coatings derived from glassy carbon  

DOE Patents (OSTI)

A process for depositing a diamond coating on a substrate at temperatures less than about 550.degree. C. A powder mixture of glassy carbon and diamond particles is passed through a high velocity oxy-flame apparatus whereupon the powders are heated prior to impingement at high velocity against the substrate. The powder mixture contains between 5 and 50 powder volume percent of the diamond particles, and preferably between 5 and 15 powder volume percent. The particles have a size from about 5 to about 100 micrometers, with the diamond particles being about 5 to about 30 micrometers. The flame of the apparatus provides a velocity of about 350 to about 1000 meters per second, with the result that upon impingement upon the substrate, the glassy carbon is phase transformed to diamond as coaxed by the diamond content of the powder mixture.

Holcombe, Jr., Cressie E. (Farragut, TN); Seals, Roland D. (Oak Ridge, TN)

1995-01-01T23:59:59.000Z

96

Low substrate temperature deposition of diamond coatings derived from glassy carbon  

DOE Patents (OSTI)

A process is disclosed for depositing a diamond coating on a substrate at temperatures less than about 550 C. A powder mixture of glassy carbon and diamond particles is passed through a high velocity oxy-flame apparatus whereupon the powders are heated prior to impingement at high velocity against the substrate. The powder mixture contains between 5 and 50 powder volume percent of the diamond particles, and preferably between 5 and 15 powder volume percent. The particles have a size from about 5 to about 100 micrometers, with the diamond particles being about 5 to about 30 micrometers. The flame of the apparatus provides a velocity of about 350 to about 1000 meters per second, with the result that upon impingement upon the substrate, the glassy carbon is phase transformed to diamond as coaxed by the diamond content of the powder mixture. 2 figs.

Holcombe, C.E. Jr.; Seals, R.D.

1995-09-26T23:59:59.000Z

97

Black Diamond, Washington: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

Diamond, Washington: Energy Resources Diamond, Washington: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 47.3087121°, -122.0031691° 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":47.3087121,"lon":-122.0031691,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

98

Corrosion Resistance of Diamond-Like Carbon (DLC) Lined Pipe to ...  

Science Conference Proceedings (OSTI)

Author(s), Peter F. Ellis, Brian Chambers, Bill Boardman. On-Site Speaker ( Planned), Peter F. Ellis. Abstract Scope, Diamond-like carbon (DLC) coatings applied...

99

I17: Surface Modification of Boron-doped Diamond with H2O Plasma  

Science Conference Proceedings (OSTI)

On the other hand, the wettability of diamond film surfaces can be altered by plasma exposure treatments. Investigation was carried on the surface modification...

100

Corrosive Resistant Diamond Coatings for the Acid Based Thermo-Chemical Hydrogen Cycles  

DOE Green Energy (OSTI)

This project was designed to test diamond, diamond-like and related materials in environments that are expected in thermochemical cycles. Our goals were to build a High Temperature Corrosion Resistance (HTCR) test stand and begin testing the corrosive properties of barious materials in a high temperature acidic environment in the first year. Overall, we planned to test 54 samples each of diamond and diamond-like films (of 1 cm x 1 cm area). In addition we use a corrosion acceleration method by treating the samples at a temperature much larger than the expected operating temperature. Half of the samples will be treated with boron using the FEDOA process.

Mark A. Prelas

2009-06-25T23:59:59.000Z

Note: This page contains sample records for the topic "ultramar diamond shamrock" 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

Raman Shift of Stressed Diamond Anvils: Pressure Calibration and Culet Geometry Dependence  

DOE Green Energy (OSTI)

The pressure dependence of the Raman shift of diamond for highly stressed anvils at the diamond-anvil sample interface has been measured for different culet shapes up to 180 GPa at ambient temperature. By using hydrogen samples, which constitute both a quasi-hydrostatic medium and a sensitive pressure sensor, some of the effects of culet and tip size have been determined. We propose that the divergent results in the literature can be partly ascribed to different anvil geometries. Experiments show increasing second order dependence of the diamond Raman shift with pressure for decreasing tip size. This is an important consideration when using the diamond anvils as a pressure sensor.

Baer, B J; Chang, M E; Evans, W J

2008-04-03T23:59:59.000Z

102

Particle? and photoinduced conductivity in type?IIa diamonds  

Science Conference Proceedings (OSTI)

Electrical characteristics associated with radiation detection were measured on single?crystal natural type?IIa diamond using two techniques: charged particle?induced conductivity and time?resolved transient photoinduced conductivity. The two techniques complement each other: The charged particle?induced conductivity technique measures the product of the carrier mobility ? and lifetime ? throughout the bulk of the material while the transient photoconductivity technique measures the carrier mobility and lifetime independently at the first few micrometers of the materialsurface. For each technique

L. S. Pan; S. Han; D. R. Kania; S. Zhao; K. K. Gan; H. Kagan; R. Kass; R. Malchow; F. Morrow; W. F. Palmer; C. White; S. K. Kim; F. Sannes; S. Schnetzer; R. Stone; G. B. Thomson; Y. Sugimoto; A. Fry; S. Kanda; S. Olsen; M. Franklin; J. W. Ager III; P. Pianetta

1993-01-01T23:59:59.000Z

103

Study of bound hydrogen in powders of diamond nanoparticles  

Science Conference Proceedings (OSTI)

In order to access feasibility of increasing albedo of very cold neutrons from powder of diamond nanoparticles, we studied hydrogen bound to surface of diamond nanoparticles, which causes unwanted losses of neutrons. We showed that one could decrease a fraction of hydrogen atoms from a ratio C{sub 7.4{+-}0.15}H to a ratio C{sub 12.4{+-}0.2}H by means of thermal treatment and outgasing of powder. Measurements of atomic excitation spectra of these samples, using a method of inelastic incoherent neutron scattering, indicate that residual hydrogen is chemically bound to carbon, while a removed fraction was composed of adsorbed water. The total cross section of scattering of neutrons with a wavelength of 4.4 Angstrom-Sign on residual hydrogen atoms equals 108 {+-} 2 b; it weakly changes with temperature. Thus preliminary cleaning of powder from hydrogen and its moderate cooling do not improve considerably neutron albedo from powder of nano-diamonds. An alternative approach is isotopic replacement of hydrogen by deuterium.

Krylov, A. R.; Lychagin, E. V.; Muzychka, A. Yu. [Joint Institute for Nuclear Research (Russian Federation); Nesvizhevsky, V. V., E-mail: nesvizhevsky@ill.eu [Institut Laue-Langevin (Russian Federation); Nekhaev, G. V.; Strelkov, A. V. [Joint Institute for Nuclear Research (Russian Federation); Ivanov, A. S. [Institut Laue-Langevin (Russian Federation)

2011-12-15T23:59:59.000Z

104

Plasma deposited diamond-like carbon films for large neutralarrays  

SciTech Connect

To understand how large systems of neurons communicate, we need to develop methods for growing patterned networks of large numbers of neurons. We have found that diamond-like carbon thin films formed by energetic deposition from a filtered vacuum arc carbon plasma can serve as ''neuron friendly'' substrates for the growth of large neural arrays. Lithographic masks can be used to form patterns of diamond-like carbon, and regions of selective neuronal attachment can form patterned neural arrays. In the work described here, we used glass microscope slides as substrates on which diamond-like carbon was deposited. PC-12 rat neurons were then cultured on the treated substrates and cell growth monitored. Neuron growth showed excellent contrast, with prolific growth on the treated surfaces and very low growth on the untreated surfaces. Here we describe the vacuum arc plasma deposition technique employed, and summarize results demonstrating that the approach can be used to form large patterns of neurons.

Brown, I.G.; Blakely, E.A.; Bjornstad, K.A.; Galvin, J.E.; Monteiro, O.R.; Sangyuenyongpipat, S.

2004-07-15T23:59:59.000Z

105

Annealing dependence of diamond-metal Schottky barrier heights probed by hard x-ray photoelectron spectroscopy  

SciTech Connect

Hard x-ray photoelectron spectroscopy was applied to investigate the diamond-metal Schottky barrier heights for several metals and diamond surface terminations. The position of the diamond valence-band maximum was determined by theoretically calculating the diamond density of states and applying cross section corrections. The diamond-platinum Schottky barrier height was lowered by 0.2 eV after thermal annealing, indicating annealing may increase carrier injection in diamond devices leading to photoconductive gain. The platinum contacts on oxygen-terminated diamond was found to provide a higher Schottky barrier and therefore a better blocking contact than that of the silver contact in diamond-based electronic devices.

Gaowei, M.; Muller, E. M. [Department of Materials Science and Engineering, SUNY Stony Brook, Stony Brook, New York 11794 (United States); Rumaiz, A. K. [National Synchrotron Light Source, Brookhaven National Laboratory, Upton, New York 11973 (United States); Weiland, C.; Cockayne, E.; Woicik, J. C. [National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States); Jordan-Sweet, J. [IBM T.J. Watson Research Center, Yorktown Heights, New York 10598 (United States); Smedley, J. [Instrumentation Department, Brookhaven National Laboratory, Upton, New York 11973 (United States)

2012-05-14T23:59:59.000Z

106

Growth of diamond films using an enclosed methyl-acetylene and propadiene combustion flame  

E-Print Network (OSTI)

1 Growth of diamond films using an enclosed methyl-acetylene and propadiene combustion flame K Abstract Diamond growth in low pressure combustion flames was studied using a safer, more economical and chemical kinetic time scales in the combustion reactor. 1 Present Address: 3M Corporation, Bldg. 60-1N-01

Dandy, David

107

Diameter-controlled Growth of Single-walled Carbon Nanotubes by Using Nano-Diamonds  

E-Print Network (OSTI)

Diameter-controlled Growth of Single-walled Carbon Nanotubes by Using Nano-Diamonds Shohei Chiashi diameter attract attention. Here, we perform CVD growth by using nano-diamond particles as the catalyst [1] and investigate the CVD condition dependence of SWNT tube diameter. The average diameter of the as-received nano

Maruyama, Shigeo

108

Method of bonding diamonds in a matrix and articles thus produced  

DOE Patents (OSTI)

By fluorinating diamond grit, the grit may be readily bonded into a fluorocarbon resin matrix. The matrix is formed by simple hot pressing techniques. Diamond grinding wheels may advantageously be manufactured using such a matrix. Teflon fluorocarbon resins are particularly well suited for using in forming the matrix.

Taylor, G.W.

1981-01-27T23:59:59.000Z

109

On diamond windows for high power synchrotron x-ray beams  

SciTech Connect

Recent advances in chemical vapor deposition (CVD) technology has made available thin, free-standing polycrystalline diamond foils that can be used as the window material on high heat load synchrotron x-ray beamlines. Diamond windows have many advantages that stem from the exceptionally attractive thermal, structural, and physical properties of diamond. Numerical simulations indicate that diamond windows can offer an attractive and at times the only alternative to beryllium windows for use on the third generation x-ray synchrotron radiation beamlines. Utilization, design, and fabrication aspects of diamond windows for high heat load x-ray beamlines are discussed, and analytical and numerical results are presented to provide a basis for the design and testing of such windows.

Khounsary, A.M.; Kuzay, T.M.

1991-12-31T23:59:59.000Z

110

On diamond windows for high power synchrotron x-ray beams  

SciTech Connect

Recent advances in chemical vapor deposition (CVD) technology has made available thin, free-standing polycrystalline diamond foils that can be used as the window material on high heat load synchrotron x-ray beamlines. Diamond windows have many advantages that stem from the exceptionally attractive thermal, structural, and physical properties of diamond. Numerical simulations indicate that diamond windows can offer an attractive and at times the only alternative to beryllium windows for use on the third generation x-ray synchrotron radiation beamlines. Utilization, design, and fabrication aspects of diamond windows for high heat load x-ray beamlines are discussed, and analytical and numerical results are presented to provide a basis for the design and testing of such windows.

Khounsary, A.M.; Kuzay, T.M.

1991-01-01T23:59:59.000Z

111

Design and Application of CVD Diamond Windows for X-Rays at the Advanced Photon Source  

Science Conference Proceedings (OSTI)

Two types of directly cooled, 0.2-mm-thick, 8-mm-diameter clear aperture CVD diamond windows have been designed and successfully fabricated by two different vendors for use at the Advanced Photon Source (APS). Both windows contain a direct braze joint between the diamond and the cooled OFHC copper. These windows can be used to replace the front-end beryllium windows in high-heat-load applications and can be used as white beam windows in the beamlines. This paper presents the detailed design of the diamond windows, the thermal analysis of the diamond window under different thermal load configurations, as well as a complete list of the existing APS front-end beryllium window configurations and replacement scenarios. Small-angle scattering experiments have been conducted on both diamond windows and a polished beryllium window, and the results are presented.

Jaski, Yifei [Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Ave, Bldg 401, Argonne, IL 60439 (United States); Cookson, David [University of Chicago, CARS, APS Sector 15, 9700 S. Cass Ave, Bldg. 434D, Argonne, IL 60439 (United States)

2007-01-19T23:59:59.000Z

112

Design and application of CVD diamond windows for x-rays at the Advanced Photon Source.  

Science Conference Proceedings (OSTI)

Two types of directly cooled, 0.2-mm-thick, 8-mm-diameter clear aperture CVD diamond windows have been designed and successfully fabricated by two different vendors for use at the Advanced Photon Source (APS). Both windows contain a direct braze joint between the diamond and the cooled OFHC copper. These windows can be used to replace the front-end beryllium windows in high-heat-load applications and can be used as white beam windows in the beamlines. This paper presents the detailed design of the diamond windows, the thermal analysis of the diamond window under different thermal load configurations, as well as a complete list of the existing APS front-end beryllium window configurations and replacement scenarios. Small-angle scattering experiments have been conducted on both diamond windows and a polished beryllium window, and the results are presented.

Jaski, Y.; Cookson, D.; Experimental Facilities Division (APS); Univ. of Chicago

2007-01-01T23:59:59.000Z

113

Engineering shallow spins in diamond with nitrogen delta-doping  

SciTech Connect

We demonstrate nanometer-precision depth control of nitrogen-vacancy (NV) center creation near the surface of synthetic diamond using an in situ nitrogen delta-doping technique during plasma-enhanced chemical vapor deposition. Despite their proximity to the surface, doped NV centers with depths (d) ranging from 5 to 100 nm display long spin coherence times, T{sub 2} > 100 {mu}s at d = 5 nm and T{sub 2} > 600 {mu}s at d {>=} 50 nm. The consistently long spin coherence observed in such shallow NV centers enables applications such as atomic-scale external spin sensing and hybrid quantum architectures.

Ohno, Kenichi; Joseph Heremans, F.; Bassett, Lee C.; Myers, Bryan A.; Toyli, David M.; Bleszynski Jayich, Ania C.; Palmstrom, Christopher J.; Awschalom, David D. [Center for Spintronics and Quantum Computation, University of California, Santa Barbara, California 93106 (United States)

2012-08-20T23:59:59.000Z

114

Method and apparatus for making diamond-like carbon films  

SciTech Connect

Ion-assisted plasma enhanced deposition of diamond-like carbon (DLC) films on the surface of photovoltaic solar cells is accomplished with a method and apparatus for controlling ion energy. The quality of DLC layers is fine-tuned by a properly biased system of special electrodes and by exact control of the feed gas mixture compositions. Uniform (with degree of non-uniformity of optical parameters less than 5%) large area (more than 110 cm.sup.2) DLC films with optical parameters varied within the given range and with stability against harmful effects of the environment are achieved.

Pern, Fu-Jann (Golden, CO); Touryan, Kenell J. (Indian Hills, CO); Panosyan, Zhozef Retevos (Yerevan, AM); Gippius, Aleksey Alekseyevich (Moscow, RU)

2008-12-02T23:59:59.000Z

115

Charging characteritiscs of ultrananocrystalline diamond in RF MEMS capacitive switches.  

SciTech Connect

Modifications to a standard capacitive MEMS switch process have been made to allow the incorporation of ultra-nano-crystalline diamond as the switch dielectric. The impact on electromechanical performance is minimal. However, these devices exhibit uniquely different charging characteristics, with charging and discharging time constants 5-6 orders of magnitude quicker than conventional materials. This operation opens the possibility of devices which have no adverse effects of dielectric charging and can be operated near-continuously in the actuated state without significant degradation in reliability.

Sumant, A. V.; Goldsmith, C.; Auciello, O.; Carlisle, J.; Zheng, H.; Hwang, J. C. M.; Palego, C.; Wang, W.; Carpick, R.; Adiga, V.; Datta, A.; Gudeman, C.; O'Brien, S.; Sampath, S.

2010-05-01T23:59:59.000Z

116

PDC (polycrystalline diamond compact) bit research at Sandia National Laboratories  

DOE Green Energy (OSTI)

From the beginning of the geothermal development program, Sandia has performed and supported research into polycrystalline diamond compact (PDC) bits. These bits are attractive because they are intrinsically efficient in their cutting action (shearing, rather than crushing) and they have no moving parts (eliminating the problems of high-temperature lubricants, bearings, and seals.) This report is a summary description of the analytical and experimental work done by Sandia and our contractors. It describes analysis and laboratory tests of individual cutters and complete bits, as well as full-scale field tests of prototype and commercial bits. The report includes a bibliography of documents giving more detailed information on these topics. 26 refs.

Finger, J.T.; Glowka, D.A.

1989-06-01T23:59:59.000Z

117

Diamond Willow Wind (07) Wind Farm | Open Energy Information  

Open Energy Info (EERE)

Wind (07) Wind Farm Wind (07) Wind Farm Jump to: navigation, search Name Diamond Willow Wind (07) Wind Farm Facility Diamond Willow Wind (07) Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Montana-Dakota Utilities Developer Montana-Dakota Utilities Energy Purchaser Montana-Dakota Utilities Location Near Baker MT Coordinates 46.274903°, -104.183013° 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":46.274903,"lon":-104.183013,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

118

Diamond Willow Wind (08) Wind Farm | Open Energy Information  

Open Energy Info (EERE)

Willow Wind (08) Wind Farm Willow Wind (08) Wind Farm Jump to: navigation, search Name Diamond Willow Wind (08) Wind Farm Facility Diamond Willow Wind (08) Sector Wind energy Facility Type Commercial Scale Wind Facility Status In Service Owner Montana-Dakota Utilities Developer Montana-Dakota Utilities Energy Purchaser Montana-Dakota Utilities Location Near Baker MT Coordinates 46.268046°, -104.201742° 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":46.268046,"lon":-104.201742,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

119

Sparkling Diamonds Reducing High Energy in the Frozen North  

E-Print Network (OSTI)

De Beers, the undisputed world leader in diamond mining, in a typically proactive approach, completed an energy review at the Snap Lake Diamond Mine in the Northwest Territories. What makes the approach unique is that the mine is still under construction. The focus on a construction site tends to be on keeping the project on schedule, and not on energy matters although the two can, and need to, complement each other. There were two motivating factors in completing an energy review during the construction phase: cost and environmental responsibilities. De Beers Canada is working to identify a long term strategy to manage their business in a sustainable manner while mitigating the energy costs of their on-site power usage. The paper will highlight the: Approach De Beers took; Challenges of conducting an energy assessment at a construction site; Energy issues exposed by a sub-arctic climate Results achieved; Next steps to achieve a sustainable energy management program. The paper will also discuss how De Beers Canada is incorporating the learning and the systems development benefits from the energy review. The organization is building these aspects into their overall Carbon Emissions and Energy Management System that will be implemented at their three new sites across Canada.

Feldman, J.

2007-01-01T23:59:59.000Z

120

Mechanical stiffness and dissipation in ultrananocrystalline diamond micro-resonators.  

SciTech Connect

We have characterized mechanical properties of ultrananocrystalline diamond (UNCD) thin films grown using the hot filament chemical vapor deposition (HFCVD) technique at 680 C, significantly lower than the conventional growth temperature of {approx}800 C. The films have {approx}4.3% sp{sup 2} content in the near-surface region as revealed by near edge x-ray absorption fine structure spectroscopy. The films, {approx}1 {micro}m thick, exhibit a net residual compressive stress of 370 {+-} 1 MPa averaged over the entire 150 mm wafer. UNCD microcantilever resonator structures and overhanging ledges were fabricated using lithography, dry etching, and wet release techniques. Overhanging ledges of the films released from the substrate exhibited periodic undulations due to stress relaxation. This was used to determine a biaxial modulus of 838 {+-} 2 GPa. Resonant excitation and ring-down measurements in the kHz frequency range of the microcantilevers were conducted under ultrahigh vacuum (UHV) conditions in a customized UHV atomic force microscope system to determine Young's modulus as well as mechanical dissipation of cantilever structures at room temperature. Young's modulus is found to be 790 {+-} 30 GPa. Based on these measurements, Poisson's ratio is estimated to be 0.057 {+-} 0.038. The quality factors (Q) of these resonators ranged from 5000 to 16000. These Q values are lower than theoretically expected from the intrinsic properties of diamond. The results indicate that surface and bulk defects are the main contributors to the observed dissipation in UNCD resonators.

Sumant, A. V.; Adiga, V. P.; Suresh, S.; Gudeman, C.; Auciello, O.; Carlis, J. A.; Carpick, R. W.

2009-01-01T23:59:59.000Z

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


121

Large-area low-temperature ultrananocrystaline diamond (UNCD) films and integration with CMOS devices for monolithically integrated diamond MEMD/NEMS-CMOS systems.  

SciTech Connect

Because of exceptional mechanical, chemical, and tribological properties, diamond has a great potential to be used as a material for the development of high-performance MEMS and NEMS such as resonators and switches compatible with harsh environments, which involve mechanical motion and intermittent contact. Integration of such MEMS/NEMS devices with complementary metal oxide semiconductor (CMOS) microelectronics will provide a unique platform for CMOS-driven commercial MEMS/NEMS. The main hurdle to achieve diamond-CMOS integration is the relatively high substrate temperatures (600-800 C) required for depositing conventional diamond thin films, which are well above the CMOS operating thermal budget (400 C). Additionally, a materials integration strategy has to be developed to enable diamond-CMOS integration. Ultrananocrystalline diamond (UNCD), a novel material developed in thin film form at Argonne, is currently the only microwave plasma chemical vapor deposition (MPCVD) grown diamond film that can be grown at 400 C, and still retain exceptional mechanical, chemical, and tribological properties comparable to that of single crystal diamond. We have developed a process based on MPCVD to synthesize UNCD films on up to 200 mm in diameter CMOS wafers, which will open new avenues for the fabrication of monolithically integrated CMOS-driven MEMS/NEMS based on UNCD. UNCD films were grown successfully on individual Si-based CMOS chips and on 200 mm CMOS wafers at 400 C in a MPCVD system, using Ar-rich/CH4 gas mixture. The CMOS devices on the wafers were characterized before and after UNCD deposition. All devices were performing to specifications with very small degradation after UNCD deposition and processing. A threshold voltage degradation in the range of 0.08-0.44V and transconductance degradation in the range of 1.5-9% were observed.

Sumant, A.V.; Auciello, O.; Yuan, H.-C; Ma, Z.; Carpick, R. W.; Mancini, D. C.; Univ. of Wisconsin; Univ. of Pennsylvania

2009-05-01T23:59:59.000Z

122

Experimental demonstration of wakefield effects in a THz planar diamond accelerating structure  

Science Conference Proceedings (OSTI)

We have directly measured THz wakefields induced by a subpicosecond, intense relativistic electron bunch in a diamond loaded accelerating structure via the wakefield acceleration method. We present here the beam test results from the diamond based structure. Diamond has been chosen for its high breakdown threshold and unique thermoconductive properties. Fields produced by a leading (drive) beam were used to accelerate a trailing (witness) electron bunch, which followed the drive bunch at a variable distance. The energy gain of a witness bunch as a function of its separation from the drive bunch describes the time structure of the generated wakefield.

Antipov, S.; Jing, C. [Euclid Techlabs LLC, Solon, Ohio 44139 (United States); Argonne Wakefield Accelerator Facility, Argonne National Laboratory, Argonne, Illinois 60439 (United States); Kanareykin, A.; Butler, J. E. [Euclid Techlabs LLC, Solon, Ohio 44139 (United States); Yakimenko, V.; Fedurin, M.; Kusche, K. [Accelerator Test Facility, Brookhaven National Laboratory, Upton, New York 11973 (United States); Gai, W. [Argonne Wakefield Accelerator Facility, Argonne National Laboratory, Argonne, Illinois 60439 (United States)

2012-03-26T23:59:59.000Z

123

Radiation monitoring with CVD Diamonds and PIN Diodes at BaBar  

Science Conference Proceedings (OSTI)

The BaBar experiment at the Stanford Linear Accelerator Center has been using two polycrystalline chemical vapor deposition (pCVD) diamonds and 12 silicon PIN diodes for radiation monitoring and protection of the Silicon Vertex Tracker (SVT). We have used the pCVD diamonds for more than 3 years, and the PIN diodes for 7 years. We will describe the SVT and SVT radiation monitoring system as well as the operational difficulties and radiation damage effects on the PIN diodes and pCVD diamonds in a high-energy physics environment.

Bruinsma, M.; Burchat, P.; Curry, S.; Edwards, A.J.; Kagan, H.; Kass, R.; Kirkby, D.; Majewski, S.; Petersen, B.A.; /UC, Irvine /SLAC /Ohio State U.

2008-02-13T23:59:59.000Z

124

Plasma etching of cavities into diamond anvils for experiments at high pressures and high temperatures  

Science Conference Proceedings (OSTI)

We describe a method for precisely etching small cavities into the culets of diamond anvils for the purpose of providing thermal insulation for samples in experiments at high pressures and high temperatures. The cavities were fabricated using highly directional oxygen plasma to reactively etch into the diamond surface. The lateral extent of the etch was precisely controlled to micron accuracy by etching the diamond through a lithographically fabricated tungsten mask. The performance of the etched cavities in high-temperature experiments in which the samples were either laser heated or electrically heated is discussed.

Weir, S.T.; Cynn, H.; Falabella, S.; Evans, W.J.; Aracne-Ruddle, C.; Farber, D.; Vohra, Y.K. (LLNL); (UAB)

2012-10-23T23:59:59.000Z

125

Measurements and Studies of Secondary Electron Emission of Diamond Amplified Photocathode  

DOE Green Energy (OSTI)

The Diamond Amplified Photocathode (DAP) is a novel approach to generating electrons. By following the primary electron beam, which is generated by traditional electron sources, with an amplifier, the electron beam available to the eventual application is increased by 1 to 2 orders of magnitude in current. Diamond has a very wide band gap of 5.47eV which allows for a good negative electron affinity with simple hydrogenation, diamond can hold more than 2000MV/m field before breakdown. Diamond also provides the best rigidity among all materials. These two characters offer the capability of applying high voltage across very thin diamond film to achieve high SEY and desired emission phase. The diamond amplifier also is capable of handling a large heat load by conduction and sub-nanosecond pulse input. The preparation of the diamond amplifier includes thinning and polishing, cleaning with acid etching, metallization, and hydrogenation. The best mechanical polishing available can provide high purity single crystal diamond films with no less than 100 {micro}m thickness and <15 nm Ra surface roughness. The ideal thickness for 700MHz beam is {approx}30 {micro}m, which requires further thinning with RIE or laser ablation. RIE can achieve atomic layer removal precision and roughness eventually, but the time consumption for this procedure is very significant. Laser ablation proved that with <266nm ps laser beam, the ablation process on the diamond can easily achieve removing a few microns per hour from the surface and <100nm roughness. For amplifier application, laser ablation is an adequate and efficient process to make ultra thin diamond wafers following mechanical polishing. Hydrogenation will terminate the diamond surface with monolayer of hydrogen, and form NEA so that secondary electrons in the conduction band can escape into the vacuum. The method is using hydrogen cracker to strike hydrogen atoms onto the bare diamond surface to form H-C bonds. Two independent experiments were carried out to determine the transport of the electrons within the diamond and their emission at the surface. In transmission mode measurements, the diamond amplifier was coated with metal on both sides, so results simply depend only on the electron transport within the diamond. The SEY for this mode provides one secondary electron per 20eV energy, which gives the gain of more than 200 for 4.7keV (effective energy) primary electrons under 2MV/m. Laser detrapping can help the signal maintain the gain with lops pulse and duty cycle of 1.67 x 10{sup -7}. In emission mode measurements, in which the diamond is prepared as in the actual application, the SEY is {approx}20 for 700eV (effective energy) primary electrons under 1.21MV/m. The electric field applied and the primary electron energy is limited by the experiment setup, but the results show good trend toward large gain under high field. Thermal emittance of the diamond secondary emission is critical for the beam application. A careful design is setup to measure with very fine precision and accuracy of 0.01eV.

Wu,Q.

2008-10-01T23:59:59.000Z

126

Development of Designer Diamond Anvils for High Pressure-High-Temperature Experiments in Support of the Stockpile Stewardship Program  

DOE Green Energy (OSTI)

The focus of this program at the University of Alabama at Birmingham (UAB) is to develop the next generation of designer diamond anvils that can perform simultaneous joule heating and temperature profile measurements in a diamond anvil cell. A series of tungsten-rhenium thermocouples will be fabricated onto to the anvil and encapsulated by a chemical vapor deposited diamond layer to allow for a complete temperature profile measurement across the anvil. The tip of the diamond anvil will be engineered to reduce the thermal conductivity so that the tungsten-heating coils can be deposited on top of this layer. Several different approaches will be investigated to engineer the tip of the diamond anvil for reduction in thermal conductivity (a) isotopic mixture of 12C and 13C in the diamond layer, (b) doping of diamond with impurities (nitrogen and/or boron), and (c) growing diamond in a higher concentration of methane in hydrogen plasma. Under this academic alliance with Lawrence Livermore National Laboratory (LLNL), PI and his graduate students will use the lithographic and diamond polishing facility at LLNL. This proposed next generation of designer diamond anvils will allow multi-tasking capability with the ability to measure electrical, magnetic, structural and thermal data on actinide materials with unparallel sensitivity in support of the stockpile stewardship program.

Yogesh K. Vohra

2005-05-12T23:59:59.000Z

127

Diamond Amplified Photocathode at BNL | U.S. DOE Office of Science (SC)  

Office of Science (SC) Website

Diamond Amplified Photocathode at BNL Diamond Amplified Photocathode at BNL Nuclear Physics (NP) NP Home About Research Facilities Science Highlights Benefits of NP Spinoff Applications Spinoff Archives SBIR/STTR Applications of Nuclear Science and Technology Funding Opportunities Nuclear Science Advisory Committee (NSAC) News & Resources Contact Information Nuclear Physics U.S. Department of Energy SC-26/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-3613 F: (301) 903-3833 E: sc.np@science.doe.gov More Information » Spinoff Archives Diamond Amplified Photocathode at BNL Print Text Size: A A A RSS Feeds FeedbackShare Page Application/instrumentation: Diamond amplified photocathode Developed at: Brookhaven National Laboratory, New York Developed in: 2004-2007 Result of NP research:

128

Thermal, structural, and fabrication aspects of diamond windows for high power synchrotron x-ray beamlines  

SciTech Connect

Recent advances in chemical vapor deposition (CVD) technology have made it possible to produce thin free-standing diamond foils that can be used as the window material in high heat load, synchrotron beamlines. Numerical simulations suggest that these windows can offer an attractive and at times the only altemative to beryllium windows for use in third generation x-ray synchrotron radiation beamlines. Utilization, design, and fabrication aspects of diamond windows for high heat load x-ray beamlines are discussed, as are the microstructure characteristics bearing on diamond`s performance in this role. Analytic and numerical results are also presented to provide a basis for the design and testing of such windows.

Khounsary, A.M. [Argonne National Lab., IL (United States); Phillips, W. [Crystallume, Menlo Park, CA (United States)

1992-12-01T23:59:59.000Z

129

Optical data of meteoritic nano-diamonds from far-ultraviolet to far-infrared wavelengths  

E-Print Network (OSTI)

We have used different spectroscopic techniques to obtain a consistent quantitative absorption spectrum of a sample of meteoritic nano-diamonds in the wavelength range from the vacuum ultraviolet (0.12 $\\mu$m) to the far infrared (100 $\\mu$m). The nano-diamonds have been isolated by a chemical treatment from the Allende meteorite (Braatz et al.2000). Electron energy loss spectroscopy (EELS) extends the optical measurements to higher energies and allows the derivation of the optical constants (n & k) by Kramers-Kronig analysis. The results can be used to restrain observations and to improve current models of the environment where the nano-diamonds are expected to have formed. We also show that the amount of nano-diamond which can be present in space is higher than previously estimated by Lewis et al. (1989).

H. Mutschke; A. C. Andersen; C. Jaeger; Th. Henning; A. Braatz

2004-08-10T23:59:59.000Z

130

New Superhard Form of Carbon Dents Diamond | U.S. DOE Office...  

Office of Science (SC) Website

20585 P: (301) 903-7486 F: (301) 903-4846 E: sc.ascr@science.doe.gov More Information August 2012 New Superhard Form of Carbon Dents Diamond Squeezing creates new class of...

131

Diamond-turning HP-21 beryllium to achieve an optical surface  

SciTech Connect

Investigation of diamond turning on beryllium was made in anticipation of obtaining an optical finish. Although results of past experiences were poor, it was decided to continue diamond turning on beryllium beyond initial failures. By changing speed and using coolant, partial success was achieved. Tool wear was the major problem. Tests were made to establish and plot wear as a function of cutting speed and time. Slower speeds did cause lower wear rates, but at no time did wear reach an acceptable level. The machine, tools, and procedure used were chosen based on the results of preliminary attempts and on previous experience. It was unnecessary to use an air-bearing spindle because tool failure governed the best finish that could be expected. All tools of diamond composition, whether single crystal or polycrystalline, wore at unacceptable rates. Based on present technology, it must be concluded that beryllium cannot be feasibly diamond turned to achieve an optical finish. (22 fig.) (auth)

Allen, D.K.; Hauschildt, H.W.; Bryan, J.B.

1975-09-25T23:59:59.000Z

132

Growth and electrical characterisation of {delta}-doped boron layers on (111) diamond surfaces  

SciTech Connect

A plasma enhanced chemical vapor deposition protocol for the growth of {delta}-doping of boron in diamond is presented, using the (111) diamond plane as a substrate for diamond growth. AC Hall effect measurements have been performed on oxygen terminated {delta}-layers and desirable sheet carrier densities ({approx}10{sup 13} cm{sup -2}) for field-effect transistor application are reported with mobilities in excess of what would expected for equivalent but thicker heavily boron-doped diamond films. Temperature-dependent impedance spectroscopy and secondary ion mass spectroscopy measurements show that the grown layers have metallic-like electrical properties with high cut-off frequencies and low thermal impedance activation energies with estimated boron concentrations of approximately 10{sup 20} cm{sup -3}.

Edgington, Robert; Jackman, Richard B. [London Centre for Nanotechnology, and Department of Electronic and Electrical Engineering, University College London, 17-19 Gordon Street, London, WC1H 0AH (United Kingdom); Sato, Syunsuke; Ishiyama, Yuichiro; Kawarada, Hiroshi [Department of Electronic and Photonic Systems, Waseda University, Okubo 3-4-1, Shinjuku, Tokyo 169-8555 (Japan); Morris, Richard [Advanced SIMS Projects, Department of Physics, University of Warwick, Coventry CV4 7AL (United Kingdom)

2012-02-01T23:59:59.000Z

133

ANL/APS/TB-24 Diamond Monochromators for APS Undulator-A Beamlines  

E-Print Network (OSTI)

, Cutoff Energies, and Tuning Range .......................27 3.3 Absorption .............................................................36 4.2 Direct Cooling of Diamonds ............................................................39 4.3 Operation at Cryogenic Temperatures .................................................39 4.4 Cooling through

Kemner, Ken

134

Microsoft Word - DiamondB_Easement_CX.doc  

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

16, 2011 16, 2011 REPLY TO ATTN OF: KEC-4 SUBJECT: Environmental Clearance Memorandum Cecilia Brown Project Manager - KEWM-4 Proposed Action: Provision of funds to Montana Fish, Wildlife & Parks to purchase the Diamond B conservation easement. Fish and Wildlife Project No.: 2008-800-00 Categorical Exclusion Applied (from Subpart D, 10 C.F.R. Part 1021): B1.25 Transfer, lease, disposition or acquisition of interests in uncontaminated land for habitat preservation or wildlife management, and only associated buildings that support these purposes. Uncontaminated means that there will be no potential for release of substances at a level, or in a form, that would pose a threat to public health or the environment. Location: Township 28N, Range 20W, Sections 28 and 33 in Flathead County, MT

135

Creation of multiple identical single photon emitters in diamond  

E-Print Network (OSTI)

Emitters of indistinguishable single photons are crucial for the growing field of quantum technologies. To realize scalability and increase the complexity of quantum optics technologies, multiple independent yet identical single photon emitters are also required. However typical solid-state single photon sources are dissimilar, necessitating the use of electrical feedback or optical cavities to improve spectral overlap between distinct emitters. Here, we present controllable growth of bright silicon-vacancy (SiV-) centres in bulk diamond which intrinsically show almost identical emission (spectral overlap of up to 83%) and near transform-limited excitation linewidths. We measure the photo-physical properties of defects at room and cryogenic temperatures, and demonstrate incorporation into a solid immersion lens (SIL). Our results have impact upon the application of single photon sources for quantum optics and cryptography, and the production of next generation fluorophores for bio-imaging.

Lachlan J. Rogers; Kay D. Jahnke; Luca Marseglia; Christoph. Mller; Boris Naydenov; Hardy Schauffert; C. Kranz; T. Teraji; Junichi Isoya; Liam P. McGuinness; Fedor Jelezko

2013-10-14T23:59:59.000Z

136

Experimental Design for Laser Produced Shocks in Diamond Anvil Cells  

Science Conference Proceedings (OSTI)

Laser driven shock measurements have been performed on pre-compressed samples. A diamond anvil cell (DAC) has been used to statically compress water to 1 GPa and then strong shocked with an energetic laser. The use of intense laser irradiation can drive shocks in targets making it possible to study the equation of state (EOS) of samples well into the hundreds of GPQ regime. Generally, such experiments employ a sample initially at normal density and standard pressure. Therefore providing data on the principal Hugoniot. In this experiment the initial state of the sample was varied to provide data off the principal Hugoniot. We report the work that was done on the Vulcan laser and describe a method to achieve off principal Hugoniot data.

Moon, S J; Cauble, R; Collins, G W; Celliers, P M; Hicks, D; Da Silva, L B; Mackinon, A; Wallace, R; Hammel, B; Hsing, W; Jeanloz, R; Lee, K M; Benedetti, L R; Koenig, M; Benuzzi, A; Huser, G; Henry, E; Batani, D; Willi, O; Pasley, J; Henning, G; Loubeyre, P; Neely, D; Notley, M; Danson, C

2001-06-22T23:59:59.000Z

137

Molecular Limits to the Quantum Confinement Model in Diamond Clusters  

DOE Green Energy (OSTI)

The electronic structure of monodisperse, hydrogen-passivated diamond clusters in the gas phase has been studied with x-ray absorption spectroscopy. The data show that the bulk-related unoccupied states do not exhibit any quantum confinement. Additionally, density of states below the bulk absorption edge appears, consisting of features correlated to CH and CH{sub 2} hydrogen surface termination, resulting in an effective red shift of the lowest unoccupied states. The results contradict the commonly used and very successful quantum confinement model for semiconductors which predicts increasing band edge blue shifts with decreasing particle size. Our findings indicate that in the ultimate size limit for nanocrystals a more molecular description is necessary.

Willey, T M; Bostedt, C; van Buuren, T; Dahl, J E; Liu, S E; Carlson, R K; Terminello, L J; Moller, T

2005-04-07T23:59:59.000Z

138

Ultrafast QND measurements based on diamond-shape artificial atom  

E-Print Network (OSTI)

We propose a Quantum Non Demolition (QND) read-out scheme for a superconducting artificial atom coupled to a resonator in a circuit QED architecture, for which we estimate a very high measurement fidelity without Purcell effect limitations. The device consists of two transmons coupled by a large inductance, giving rise to a diamond-shape artificial atom with a logical qubit and an ancilla qubit interacting through a cross-Kerr like term. The ancilla is strongly coupled to a transmission line resonator. Depending on the qubit state, the ancilla is resonantly or dispersively coupled to the resonator, leading to a large contrast in the transmitted microwave signal amplitude. This original method can be implemented with state of the art Josephson parametric amplifier, leading to QND measurements in a few tens of nanoseconds with fidelity as large as 99.9 %.

I. Diniz; E. Dumur; O. Buisson; A. Auffves

2013-02-15T23:59:59.000Z

139

First tests of THz transmission through a Diamond Anvil Cell  

Science Conference Proceedings (OSTI)

The THz source generated by the accelerator driver for the Jefferson Lab Free Electron Laser is unique in the world in its ability to deliver a high average power beam of ultrashort (energy phenomena, and the time structure enables measurement of dynamic processes with sub-ps resolution. An outline of the range of potential applications for this THz source as a probe of sub-ps dynamics in materials under extreme conditions will be presented. To demonstrate the capabilities of this source for just such experiments, the first set of tests to characterize the transmission of the THz beam through a diamond anvil cell (DAC) have been performed. These preliminary results will be presented along with a description of the optical design used to deliver the THz beam into and out of the DAC. The current design will be compared with other possible techniques and the plans for the next set of measurements will also be given.

John Klopf

2011-01-24T23:59:59.000Z

140

Orbital ice: An exact Coulomb phase on the diamond lattice  

SciTech Connect

We demonstrate the existence of an orbital Coulomb phase as the exact ground state of a p-orbital exchange Hamiltonian on the diamond lattice. The Coulomb phase is an emergent state characterized by algebraic dipolar correlations and a gauge structure resulting from local constraints (ice rules) of the underlying lattice models. For most ice models on the pyrochlore lattice, these local constraints are a direct consequence of minimizing the energy of each individual tetrahedron. On the contrary, the orbital ice rules are emergent phenomena resulting from the quantum orbital dynamics. We show that the orbital ice model exhibits an emergent geometrical frustration by mapping the degenerate quantum orbital ground states to the spin-ice states obeying the 2-in-2-out constraints on the pyrochlore lattice. We also discuss possible realization of the orbital ice model in optical lattices with p-band fermionic cold atoms.

Chern Giawei [Department of Physics, University of Wisconsin, Madison, Wisconsin 53706 (United States); Wu Congjun [Department of Physics, University of California, San Diego, California 92093 (United States)

2011-12-15T23:59:59.000Z

Note: This page contains sample records for the topic "ultramar diamond shamrock" 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

Self-assembling hybrid diamond-biological quantum devices  

E-Print Network (OSTI)

The realization of scalable arrangements of nitrogen vacancy (NV) centers in diamond remains a key challenge on the way towards efficient quantum information processing, quantum simulation and quantum sensing applications. Although technologies based on implanting NV-center in bulk diamond crystals or hybrid device approaches have been developed, they are limited in the achievable spatial resolution and by the intricate technological complexities involved in achieving scalability. We propose and demonstrate a novel approach for creating an arrangement of NV-centers, based on the self-assembling capabilities of biological systems and its beneficial nanometer spatial resolution. Here, a self-assembled protein structure serves as a structural scaffold for surface functionalized nanodiamonds, in this way allowing for the controlled creation of NV-structures on the nanoscale and providing a new avenue towards bridging the bio-nano interface. One-, two- as well as three-dimensional structures are within the scope of biological structural assembling techniques. We realized experimentally the formation of regular structures by interconnecting nanodiamonds using biological protein scaffolds. Based on the achievable NV-center distances of 11nm, we evaluate the expected dipolar coupling interaction with neighboring NV-center as well as the expected decoherence time. Moreover, by exploiting these couplings, we provide a detailed theoretical analysis on the viability of multiqubit quantum operations, suggest the possibility of individual addressing based on the random distribution of the NV intrinsic symmetry axes and address the challenges posed by decoherence and imperfect couplings. We then demonstrate in the last part that our scheme allows for the high-fidelity creation of entanglement, cluster states and quantum simulation applications.

Andreas Albrecht; Guy Koplovitz; Alex Retzker; Fedor Jelezko; Shira Yochelis; Danny Porath; Yuval Nevo; Oded Shoseyov; Yossi Paltiel; Martin B. Plenio

2013-01-09T23:59:59.000Z

142

Characterization and Qualification of a Precision Diamond Saw  

SciTech Connect

A precision diamond saw was characterized and qualified for production using the MCCS Encryption Translator (MET) network. This characterization was performed in three steps. First the equipment was evaluated and characterized, and then a process was developed and characterized to saw cofire networks. Finally, the characterized process was qualified for production using the MET network. During the development of the low-temperature cofired ceramic (LTCC) processes needed to build the MCCS Encryption Translator (MET) network, a problem was uncovered. The laser process planned for scribing and separating was found to weaken the LTCC material by about 30%. A replacement process was needed, and precision diamond sawing was chosen. During the equipment evaluation and characterization, several parameters were investigated. These were cut depth, feed rate, spindle speed, and saw blade thickness. Once these were understood the process was then developed. Initially 24 variables were identified for the process, and eventually 12 of these variables were found to be critical. These variables were then adjusted until a process envelope was found that produced acceptable product. Finally parameters were chosen from the middle of the process envelope for production. With the production process set, the next step was to qualify it for production. Two criteria had to be met: visual acceptability and bending strength. The parts were examined under a microscope and found to be visually acceptable. Parts were then put through a four-point bend test, and the strengths recorded were equivalent to those measured in the past. With the completion of this work and the acceptable results, this process was qualified for production use.

Morgenstern, H.A.

1999-03-04T23:59:59.000Z

143

Cobalt-related impurity centers in diamond: electronic properties and hyperfine parameters  

E-Print Network (OSTI)

Cobalt-related impurity centers in diamond have been studied using first principles calculations. We computed the symmetry, formation and transition energies, and hyperfine parameters of cobalt impurities in isolated configurations and in complexes involving vacancies and nitrogen atoms. We found that the Co impurity in a divacant site is energetically favorable and segregates nitrogen atoms in its neighborhood. Our results were discussed in the context of the recently observed Co-related electrically active centers in synthetic diamond.

Larico, R; Machado, W V M; Justo, J F

2013-01-01T23:59:59.000Z

144

Pulsed ion beam methods for in situ characterization of diamond film deposition processes  

DOE Green Energy (OSTI)

Diamond and diamond-like carbon (DLC) have properties which in principle make them ideally suited to a wide variety of thin-film applications. Their widespread use as thin films, however, has been limited for a number of reasons related largely to the lack of understanding and control of the nucleation and growth processes. Real-time, in situ studies of the surface of the growing diamond film are experimentally difficult because these films are normally grown under a relatively high pressure of hydrogen, and conventional surface analytical methods require an ultrahigh vacuum environment. It is believed, however, that the presence of hydrogen during growth is necessary to stabilize the corrugated diamond surface structure and thereby prevent the formation of the graphitic phase. Pulsed ion beam-based analytical methods with differentially pumped ion sources and particle detectors are able to characterize the uppermost atomic layer of a film during, growth at ambient pressures 5-7 orders of magnitude higher than other surface-specific analytical methods. We describe here a system which has been developed for the purpose of determining the hydrogen concentration and bonding sites on diamond surfaces as a function of sample temperature and ambient hydrogen pressure under hot filament CVD growth conditions. It is demonstrated that as the hydrogen partial pressure increases, the saturation hydrogen coverage of the surface of a CVD diamond film increases, but that the saturation level depends on the atomic hydrogen concentration and substrate temperature.

Krauss, A.R.; Smentkowski, V.S.; Zuiker, C.D.; Gruen, D.M. [Argonne National Lab., IL (United States); Im, J. [Argonne National Lab., IL (United States)]|[Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering; Schultz, J.A.; Waters, K. [Ionwerks Corp., Houston, TX (United States); Chang, R.P.H. [Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering

1995-06-01T23:59:59.000Z

145

DIAMOND WIRE CUTTING OF THE TOKAMAK FUSION TEST REACTOR  

Science Conference Proceedings (OSTI)

The Tokamak Fusion Test Reactor (TFTR) is a one-of-a-kind, tritium-fueled fusion research reactor that ceased operation in April 1997. As a result, decommissioning commenced in October 1999. The 100 cubic meter volume of the donut-shaped reactor makes it the second largest fusion reactor in the world. The deuterium-tritium experiments resulted in contaminating the vacuum vessel with tritium and activating the materials with 14 Mev neutrons. The total tritium content within the vessel is in excess of 7,000 Curies while dose rates approach 50 mRem/hr. These radiological hazards along with the size of the Tokamak present a unique and challenging task for dismantling. Engineers at the Princeton Plasma Physics Laboratory (PPPL) decided to investigate an alternate, innovative approach for dismantlement of the TFTR vacuum vessel: diamond wire cutting technology. In August 1999, this technology was successfully demonstrated and evaluated on vacuum vessel surrogates. Subsequently, the techno logy was improved and redesigned for the actual cutting of the vacuum vessel. 10 complete cuts were performed in a 6-month period to complete the removal of this unprecedented type of D&D activity.

Rule, Keith; Perry, Erik; Parsells, Robert

2003-02-27T23:59:59.000Z

146

Diamond Wire Cutting of the Tokamak Fusion Test Reactor  

Science Conference Proceedings (OSTI)

The Tokamak Fusion Test Reactor (TFTR) is a one-of-a-kind, tritium-fueled fusion research reactor that ceased operation in April 1997. As a result, decommissioning commenced in October 1999. The 100 cubic meter volume of the donut-shaped reactor makes it the second largest fusion reactor in the world. The deuterium-tritium experiments resulted in contaminating the vacuum vessel with tritium and activating the materials with 14 MeV neutrons. The total tritium content within the vessel is in excess of 7,000 Curies, while dose rates approach 50 mRem/hr. These radiological hazards along with the size of the tokamak present a unique and challenging task for dismantling. Engineers at the Princeton Plasma Physics Laboratory (PPPL) decided to investigate an alternate, innovative approach for dismantlement of the TFTR vacuum vessel: diamond wire cutting technology. In August 1999, this technology was successfully demonstrated and evaluated on vacuum vessel surrogates. Subsequently, the technology was improved and redesigned for the actual cutting of the vacuum vessel. Ten complete cuts were performed in a 6-month period to complete the removal of this unprecedented type of D&D (Decontamination and Decommissioning) activity.

Keith Rule; Erik Perry; Robert Parsells

2003-01-31T23:59:59.000Z

147

Atmospheric Plasma Deposition of Diamond-like Carbon Coatings  

DOE Green Energy (OSTI)

DLC coatings in a low-pressure environment. For example, ion beam processes are widely utilized since the ion bombardment is thought to promote denser sp3-bonded carbon networks. Other processes, such as sputtering, are better suited for coating large parts [29,30,44]. However, the deposition of DLC in a vacuum system has several disadvantages, including high equipment cost and restrictions on the size and shape of material that may be treated. The deposition of DLC at atmospheric pressure has been demonstrated by several researchers. Izake, et al [53] and Novikov and Dymont [54] have demonstrated an electrochemical process that is carried out with organic compounds such as methanol and acetylene dissolved in ammonia. This process requires that the substrates be immersed in the liquid [53-54]. The atmospheric pressure deposition of DLC was also demonstrated by Kulik, et al. utilizing a plasma torch. However, this process requires operating temperatures in excess of 800 oC [55]. In this report, we investigate the deposition of diamond-like carbon films using a low temperature, atmospheric pressure plasma-enhanced chemical vapor deposition (PECVD) process. The films were characterized by solid-state carbon-13 nuclear magnetic resonance (13C NMR) and found to have a ratio of sp2 to sp3 carbon of 43 to 57%. The films were also tested for adhesion, coefficient of friction, and dielectric strength.

Ladwig, Angela

2008-01-23T23:59:59.000Z

148

Particle- and photoinduced conductivity in type-IIa diamonds  

SciTech Connect

Electrical characteristics associated with radiation detection were measured on single-crystal natural type-IIa diamond using two techniques: charged particle-induced conductivity and time-resolved transient photoinduced conductivity. The two techniques complement each other: The charged particle-induced conductivity technique measures the product of the carrier mobility [mu] and lifetime [tau] throughout the bulk of the material while the transient photoconductivity technique measures the carrier mobility and lifetime independently at the first few micrometers of the material surface. For each technique, the [mu][tau] product was determined by integration of the respective signals. The collection distance that a free carrier drifts in an electric field was extracted by each technique. As a result, a direct comparison of bulk and surface electrical properties was performed. The data from these two techniques are in agreement, indicating no difference in the electrical properties between the bulk and the surface of the material. The collection distance continues to increase with field up to 25 kV/cm without saturation. Using the transient photoconductivity technique the carrier mobility was measured separately and compared with a simple electron-phonon scattering model. The general characteristics of carrier mobility, lifetime, and collection distance at low electric field appear to be adequately described by the model.

Pan, L.S.; Han, S.; Kania, D.R. (Laser Division, L-476, Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)); Zhao, S.; Gan, K.K.; Kagan, H.; Kass, R.; Malchow, R.; Morrow, F.; Palmer, W.F.; White, C. (Department of Physics, The Ohio State University, Columbus, Ohio 43210 (United States)); Kim, S.K.; Sannes, F.; Schnetzer, S.; Stone, R.; Thomson, G.B. (Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854 (United States)); Sugimoto, Y. (KEK Laboratory, Tsukuba-shi, Ibaraki-ken, 305 (Japan)); Fry, A. (Physics Division, SSC Laboratory, Dallas, Texas 75237 (United States)); Kanda, S.; Olsen, S. (Department of Physics, University of Rochester, Rochester, New York 14627 (United States)); Franklin, M. (Department of Physics, Harvard University, Boston, Massachusetts 02138 (United States)); Ager, J.W. III (Center for Advanced Materials, Lawrence Berkeley Laboratory, Berkeley, California 94720 (United States)); Pianetta, P

1993-07-15T23:59:59.000Z

149

First tests of THz transmission through a Diamond Anvil Cell  

SciTech Connect

The THz source generated by the accelerator driver for the Jefferson Lab Free Electron Laser is unique in the world in its ability to deliver a high average power beam of ultrashort (<500 fs FWHM) broadband THz pulses. The spectrum of this source presents an ideal probe for many low energy phenomena, and the time structure enables measurement of dynamic processes with sub-ps resolution. An outline of the range of potential applications for this THz source as a probe of sub-ps dynamics in materials under extreme conditions will be presented. To demonstrate the capabilities of this source for just such experiments, the first set of tests to characterize the transmission of the THz beam through a diamond anvil cell (DAC) have been performed. These preliminary results will be presented along with a description of the optical design used to deliver the THz beam into and out of the DAC. The current design will be compared with other possible techniques and the plans for the next set of measurements will also be given.

John Klopf

2011-01-24T23:59:59.000Z

150

Recent developments in polycrystalline diamond-drill-bit design  

DOE Green Energy (OSTI)

Development of design criteria for polycrystalline diamond compact (PDC) drill bits for use in severe environments (hard or fractured formations, hot and/or deep wells) is continuing. This effort consists of both analytical and experimental analyses. The experimental program includes single point tests of cutters, laboratory tests of full scale bits, and field tests of these designs. The results of laboratory tests at simulated downhole conditions utilizing new and worn bits are presented. Drilling at simulated downhole pressures was conducted in Mancos Shale and Carthage Marble. Comparisons are made between PDC bits and roller cone bits in drilling with borehole pressures up to 5000 psi (34.5 PMa) with oil and water based muds. The PDC bits drilled at rates up to 5 times as fast as roller bits in the shale. In the first field test, drilling rates approximately twice those achieved with conventional bits were achieved with a PDC bit. A second test demonstrated the value of these bits in correcting deviation and reaming.

Huff, C.F.; Varnado, S.G.

1980-05-01T23:59:59.000Z

151

4-Diamond Formation from Amorphouse Carbon and Graphite in the Presence of COH Fluids : An InSitu High-Pressure and -Temperature Laser-Heated Diamond Anvil Cell Experimental Study  

Science Conference Proceedings (OSTI)

Microdiamonds from orogenic belts contain nanometer-size fluid inclusions suggesting diamond formation from supercritical carbon - oxygen - hydrogen (COH) fluids. Here we report experimental results of diamond nucleation from amorphous carbon and polycrystalline graphite in the presence of COH fluids in a laser-heated diamond anvil cell. Our results show that: (i) diamonds can nucleate from graphite or amorphous carbon at pressures of 9-11 GPa and temperatures of 1200-1400 K in the presence of COH fluids; (ii) it is easier to nucleate diamond from amorphous carbon than from graphite with or without the COH fluids; and (iii) the fluid from decomposition of glucose is more efficient in promoting the graphite-to-diamond transformation than the fluid from decomposition of oxalic acid dihydrate. Carbon crystallinity has strong effects on the kinetics of diamond nucleation and growth. The experimental results demonstrated the critical role of presence and composition of supercritical COH fluids for promoting the graphite-to-diamond transformation.

Zhang, J.; Prakapenka, V.; Kubo, A.; Kavner, A.; Green, H.W.; Dobrzhinetskaya, L. (China University of Geosciences)

2011-10-14T23:59:59.000Z

152

Diamond and Hydrogenated Carbons for Advanced Batteries and Fuel Cells: Fundamental Studies and Applications.  

DOE Green Energy (OSTI)

The original funding under this project number was awarded for a period 12/1999 until 12/2002 under the project title Diamond and Hydrogenated Carbons for Advanced Batteries and Fuel Cells: Fundamental Studies and Applications. The project was extended until 06/2003 at which time a renewal proposal was awarded for a period 06/2003 until 06/2008 under the project title Metal/Diamond Composite Thin-Film Electrodes: New Carbon Supported Catalytic Electrodes. The work under DE-FG02-01ER15120 was initiated about the time the PI moved his research group from the Department of Chemistry at Utah State University to the Department of Chemistry at Michigan State University. This DOE-funded research was focused on (i) understanding structure-function relationships at boron-doped diamond thin-film electrodes, (ii) understanding metal phase formation on diamond thin films and developing electrochemical approaches for producing highly dispersed electrocatalyst particles (e.g., Pt) of small nominal particle size, (iii) studying the electrochemical activity of the electrocatalytic electrodes for hydrogen oxidation and oxygen reduction and (iv) conducting the initial synthesis of high surface area diamond powders and evaluating their electrical and electrochemical properties when mixed with a Teflon binder.

Swain; Greg M.

2009-04-13T23:59:59.000Z

153

Science and technology of piezoelectric/diamond heterostructures for monolithically integrated high performance MEMS/NEMS/CMOS devices.  

SciTech Connect

This paper describes the fundamental and applied science performed to integrate piezoelectric PbZr{sub x}Ti{sub 1-x}O{sub 3} and AlN films with a novel mechanically robust ultrananocrystalline diamond layer to enable a new generation of low voltage/high-performance piezoactuated hybrid piezoelectric/diamond MEMS/NEMS devices.

Auciello, O.; Sumant, A. V.; Hiller, J.; Kabius, B.; Ma, Z.; Srinivasan, S. (Center for Nanoscale Materials); ( MSD); (Univ. of Wisconsin at Madison); (INTEL)

2008-12-01T23:59:59.000Z

154

The Development of Open Water-lubricated Polycrystalline Diamond (PCD) Thrust Bearings for Use in Marine Hydrokinetic (MHK) Energy Machines  

Science Conference Proceedings (OSTI)

Polycrstalline diamond (PCD) bearings were designed, fabricated and tested for marine-hydro-kinetic (MHK) application. Bearing efficiency and life were evaluated using the US Synthetic bearing test facility. Three iterations of design, build and test were conducted to arrive at the best bearing design. In addition life testing that simulated the starting and stopping and the loading of real MHK applications were performed. Results showed polycrystalline diamond bearings are well suited for MHK applications and that diamond bearing technology is TRL4 ready. Based on life tests results bearing life is estimated to be at least 11.5 years. A calculation method for evaluating the performance of diamond bearings of round geometry was also investigated and developed. Finally, as part of this effort test bearings were supplied free of charge to the University of Alaska for further evaluation. The University of Alaska test program will subject the diamond bearings to sediment laden lubricating fluid.

Cooley, Craig, H.; Khonsari, Michael,, M; Lingwall, Brent

2012-11-28T23:59:59.000Z

155

Thermal, structural, and fabrication aspects of diamond windows for high power synchrotron x-ray beamlines  

SciTech Connect

Recent advances in chemical vapor deposition (CVD) technology have made it possible to produce thin free-standing diamond foils that can be used as the window material in high heat load, synchrotron beamlines. Numerical simulations suggest that these windows can offer an attractive and at times the only altemative to beryllium windows for use in third generation x-ray synchrotron radiation beamlines. Utilization, design, and fabrication aspects of diamond windows for high heat load x-ray beamlines are discussed, as are the microstructure characteristics bearing on diamond's performance in this role. Analytic and numerical results are also presented to provide a basis for the design and testing of such windows.

Khounsary, A.M. (Argonne National Lab., IL (United States)); Phillips, W. (Crystallume, Menlo Park, CA (United States))

1992-01-01T23:59:59.000Z

156

Nano-fabricated solid immersion lenses registered to single emitters in diamond  

E-Print Network (OSTI)

We describe a technique for fabricating micro- and nano-structures incorporating fluorescent defects in diamond with a positional accuracy in the hundreds of nanometers. Using confocal fluorescence microscopy and focused ion beam (FIB) etching we first locate a suitable defect with respect to registration marks on the diamond surface and then etch a structure using these coordinates. We demonstrate the technique here by etching an 8 micron diameter hemisphere positioned such that a single negatively charged nitrogen-vacancy defect lies at its origin. This type of structure increases the photon collection efficiency by removing refraction and aberration losses at the diamond-air interface. We make a direct comparison of the fluorescence photon count rate before and after fabrication and observe an 8-fold increase due to the presence of the hemisphere.

L. Marseglia; J. P. Hadden; A. C. Stanley-Clarke; J. P. Harrison; B. Patton; Y. -L. D. Ho; B. Naydenov; F. Jelezko; J. Meijer; P. R. Dolan; J. M. Smith; J. G. Rarity; J. L. O'Brien

2010-12-06T23:59:59.000Z

157

Development of Single Crystal Chemical Vapor Deposition Diamonds for Detector Applications  

Science Conference Proceedings (OSTI)

Diamond was studied as a possible radiation hard technology for use in future high radiation environments. With the commissioning of the LHC expected in 2010, and the LHC upgrades expected in 2015, all LHC experiments are planning for detector upgrades which require radiation hard technologies. Chemical Vapor Deposition (CVD) diamond has now been used extensively in beam conditions monitors as the innermost detectors in the highest radiation areas of BaBar, Belle and CDF and is installed and operational in all LHC experiments. As a result, this material is now being discussed as an alternative sensor material for tracking very close to the interaction region of the super-LHC where the most extreme radiation conditions will exist. Our work addressed the further development of the new material, single-crystal Chemical Vapor Deposition diamond, towards reliable industrial production of large pieces and new geometries needed for detector applications.

Rainer Wallny

2012-10-15T23:59:59.000Z

158

A new diamond biosensor with integrated graphitic microchannels for detecting quantal exocytic events from chromaffin cells  

E-Print Network (OSTI)

The quantal release of catecholamines from neuroendocrine cells is a key mechanism which has been investigated with a broad range of materials and devices, among which carbon-based materials such as carbon fibers, diamond-like carbon, carbon nanotubes and nanocrystalline diamond. In the present work we demonstrate that a MeV-ion-microbeam lithographic technique can be successfully employed for the fabrication of an all-carbon miniaturized cellular bio-sensor based on graphitic micro-channels embedded in a single-crystal diamond matrix. The device was functionally characterized for the in vitro recording of quantal exocytic events from single chromaffin cells, with high sensitivity and signal-to-noise ratio, opening promising perspectives for the realization of monolithic all-carbon cellular biosensors.

Picollo, Federico; Vittone, Ettore; Pasquarelli, Alberto; Carbone, Emilio; Olivero, Paolo; Carabelli, Valentina

2013-01-01T23:59:59.000Z

159

Metal/Diamond Composite Thin-Film Electrodes: New Carbon Supported Catalytic Electrodes  

DOE Green Energy (OSTI)

The DOE-funded research conducted by the Swain group was focused on (i) understanding structure-function relationships at boron-doped diamond thin-film electrodes, (ii) understanding metal phase formation on diamond thin films and developing electrochemical approaches for producing highly dispersed electrocatalyst particles (e.g., Pt) of small nominal particle size, (iii) studying the electrochemical activity of the electrocatalytic electrodes for hydrogen oxidation and oxygen reduction and (iv) conducting the initial synthesis of high surface area diamond powders and evaluating their electrical and electrochemical properties when mixed with a Teflon binder. (Note: All potentials are reported versus Ag/AgCl (sat'd KCl) and cm{sup 2} refers to the electrode geometric area, unless otherwise stated).

Greg M. Swain, PI

2009-03-10T23:59:59.000Z

160

MEASUREMENT OF THE SECONDARY EMISSION YIELD OF A THIN DIAMOND WINDOW IN TRANSMISSION MODE.  

DOE Green Energy (OSTI)

The secondary emission enhanced photoinjector (SEEP) is a promising new approach to the generation of high-current, high-brightness electron beams. A low current primary electron beam with energy of a few thousand electron-volts strikes a specially prepared diamond window which emits secondary electrons with a current two orders of magnitude higher. The secondary electrons are created at the back side of the diamond and drift through the window under the influence of a strong electrical field. A hydrogen termination at the exit surface of the window creates a negative electron affinity (NEA) which allows the electrons to leave the diamond. An experiment was performed to measure the secondary electron yield and other properties. The results are discussed in this paper.

CHANG, X.; RAO, T.; SMEDLEY, J.; ET AL.

2005-05-16T23:59:59.000Z

Note: This page contains sample records for the topic "ultramar diamond shamrock" 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

Photo-stimulated low electron temperature high current diamond film field emission cathode  

DOE Patents (OSTI)

An electron source includes a back contact surface having a means for attaching a power source to the back contact surface. The electron source also includes a layer comprising platinum in direct contact with the back contact surface, a composite layer of single-walled carbon nanotubes embedded in platinum in direct contact with the layer comprising platinum. The electron source also includes a nanocrystalline diamond layer in direct contact with the composite layer. The nanocrystalline diamond layer is doped with boron. A portion of the back contact surface is removed to reveal the underlying platinum. The electron source is contained in an evacuable container.

Shurter; Roger Philips (Los Alamos, NM), Devlin; David James (Santa Fe, NM), Moody; Nathan Andrew (Los Alamos, NM), Taccetti; Jose Martin (Santa Fe, NM), Russell; Steven John (Los Alamos, NM)

2012-07-24T23:59:59.000Z

162

Calculation of the charge-carrier mobility in diamond at low temperatures  

Science Conference Proceedings (OSTI)

The discrepancies between the quasi-elastic and inelastic approaches to the calculation of the electron and hole mobilities in diamond at low temperatures when the carrier scattering from acoustic phonons becomes significantly inelastic have been numerically estimated. The calculations showed that the mobility described by a close-to-equilibrium distribution function differs several times from that obtained within the quasi-elastic approach even at 20 K. The results obtained are important for interpreting the low-temperature electrical experiments on high-purity diamond single crystals.

Baturin, A. S.; Gorelkin, V. N.; Soloviev, V. R.; Chernousov, I. V., E-mail: ichernousov@inbox.ru [Moscow Institute of Physics and Technology (Russian Federation)

2010-07-15T23:59:59.000Z

163

Automated Testing of HVAC Systems for Commissioning Tim Salsbury and Rick Diamond  

E-Print Network (OSTI)

Automated Testing of HVAC Systems for Commissioning Tim Salsbury and Rick Diamond Lawrence Berkeley of the commissioning of HVAC systems. The approach is based on software that generates a sequence of test signals for new and retrofit projects. Introduction The performance of many HVAC systems is limited more by poor

Diamond, Richard

164

Systematic studies of the nucleation and growth of ultrananocrystalline diamond films on silicon substrates coated with a tungsten layer  

Science Conference Proceedings (OSTI)

We report on effects of a tungsten layer deposited on silicon surface on the effectiveness for diamond nanoparticles to be seeded for the deposition of ultrananocrystalline diamond (UNCD). Rough tungsten surface and electrostatic forces between nanodiamond seeds and the tungsten surface layer help to improve the adhesion of nanodiamond seeds on the tungsten surface. The seeding density on tungsten coated silicon thus increases. Tungsten carbide is formed by reactions of the tungsten layer with carbon containing plasma species. It provides favorable (001) crystal planes for the nucleation of (111) crystal planes by Microwave Plasma Enhanced Chemical Vapor Deposition (MPECVD) in argon diluted methane plasma and further improves the density of diamond seeds/nuclei. UNCD films grown at different gas pressures on tungsten coated silicon which is pre-seeded by nanodiamond along with heteroepitaxially nucleated diamond nuclei were characterized by Raman scattering, field emission-scanning electron microscopy, and high resolution-transmission electron microscopy.

Chu, Yueh-Chieh; Jiang, Gerald [Institute of Microelectronics, No.1, University Road, Tainan 701, Taiwan (China); Tu, Chia-Hao [Institute of Nanotechnology and Microsystems Engineering, No.1, University Road, Tainan 701, Taiwan (China); Department of Materials Science and Engineering, National Cheng Kung University, No.1, University Road, Tainan 701, Taiwan (China); Chang Chi [Institute of Nanotechnology and Microsystems Engineering, No.1, University Road, Tainan 701, Taiwan (China); Liu, Chuan-pu; Ting, Jyh-Ming [Department of Materials Science and Engineering, National Cheng Kung University, No.1, University Road, Tainan 701, Taiwan (China); Lee, Hsin-Li [Industrial Technology Research Institute - South, Tainan 701, Taiwan (China); Tzeng, Yonhua [Institute of Microelectronics, No.1, University Road, Tainan 701, Taiwan (China); Advanced Optoelectronics Technology Center, No.1, University Road, Tainan 701, Taiwan (China); Auciello, Orlando [Argonne National Laboratory, Materials Science Division, 9700 S. Cass Avenue, Argonne, Illinois 60439 (United States)

2012-06-15T23:59:59.000Z

165

Optimization of NSLS-II Blade X-ray Beam Position Monitors: from Photoemission type to Diamond Detector  

E-Print Network (OSTI)

Optimization of blade type X-ray Beam Position Monitors (XBPM) was performed for NSLS-II undulator IVU20. Blade material, configuration and operation principle was analyzed to improve XBPM performance. Optimization is based on calculation of the XBPM signal spatial distribution. Along with standard photoemission blades, Diamond Detector Blade (DDB) was analyzed as XBPM signal source. Analyses revealed, that Diamond Detector Blade XBPM would allow overcoming drawbacks of the photoemission type XBPMs.

Ilinski, Petr

2013-01-01T23:59:59.000Z

166

A New Gas Loading System for Diamond Anvil Cells at GSECARS  

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

Sidorowicz Named "Supervisor of the Year" Sidorowicz Named "Supervisor of the Year" SESS 2007: The School for Environmental Sciences with Synchrotrons Art and Science A Breakthrough in Interface Science APS News Archives: 2012 | 2011 | 2010 | 2009 2008 | 2007 | 2006 | 2005 2004 | 2003 | 2002 | 2001 2000 Subscribe to APS News rss feed A New Gas Loading System for Diamond Anvil Cells at GSECARS MARCH 11, 2008 Bookmark and Share The diamond anvil cell (DAC) is the most commonly used device for obtaining static high pressures above 3 GPa. Experiments in the DAC are frequently performed at the APS, in particular at GSECARS (Sector 13), HP-CAT (Sector 16), and at XOR sectors 1 and 3. In order to have the sample in the DAC be subject to a quasi-hydrostatic pressure it is necessary to surround the

167

Dented Diamonds, Carbon Cages and Exceptional Potential | U.S. DOE Office  

Office of Science (SC) Website

News » Featured Articles » 2012 » Dented News » Featured Articles » 2012 » Dented Diamonds, Carbon Cages and Exceptional Potential News Featured Articles 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 Science Headlines Presentations & Testimony News Archives Contact Information Office of Science U.S. Department of Energy 1000 Independence Ave., SW Washington, DC 20585 P: (202) 586-5430 08.27.12 Dented Diamonds, Carbon Cages and Exceptional Potential Office of Science supported researchers develop new material with amazing hardness and exciting possibilities. Print Text Size: A A A Subscribe FeedbackShare Page Click to enlarge photo. Enlarge Photo Simulated structures showing the starting material of carbon-60 Image courtesy of Carnegie Institute of Washington Simulated structures showing the starting material of carbon-60

168

Diamond as a solid state quantum computer with a linear chain of nuclear spins system  

E-Print Network (OSTI)

By removing a $^{12}C$ atom from the tetrahedral configuration of the diamond, replace it by a $^{13}C$ atom, and repeating this in a linear direction, it is possible to have a linear chain of nuclear spins one half and to build a solid state quantum computer. One qubit rotation and controlled-not (CNOT) quantum gates are obtained immediately from this configuration, and CNOT quantum gate is used to determined the design parameters of this quantum computer.

G. V. Lpez

2013-10-02T23:59:59.000Z

169

Effect of Decreasing of Cobalt Content in Properties for Diamond/Cemented Carbide Tools  

Science Conference Proceedings (OSTI)

Powder metallurgy plays a role in manufacturing such as automotive and cutting tool applications. Diamond/cemented carbide tools are also made from this technique. Diamond particle and other matrix materials were employed in this study. The purpose is to investigate the physical and mechanical properties of different Cobalt (Co) content samples by using Taguchi's method. The materials used in the experiments were mixed by using a ball-mill machine. The mixed powders were pressed by conventional method. Then the green samples were sintered in a vacuum furnace. After reaching 500 deg. C, the samples were sintered with Argon (Ar) gas. The sintered samples were investigated density by immersion method, porosity by water saturation method, and hardness by Vicker hardness tester. It was found that with 59.5% Co content, plain diamond type, sintering temperature of 950 deg. C, sintering time of 40 minutes, and pressure of 625 MPa, density, porosity, and hardness got the best result in this study. From the Taguchi's analysis, the significant factors effected the performance were composition, sintering temperature, and sintering time.

Waratta, A.; Hamdi, M. [Department of Design and Manufacture, Faculty of Engineering, University of Malaya (Malaysia); Ariga, T. [Department of Materials Science, School of Engineering, Tokai University (Japan)

2010-03-11T23:59:59.000Z

170

The effects of diamond injector angles on flow structures at various Mach numbers  

E-Print Network (OSTI)

Numerical simulations of a three dimensional diamond jet interaction flowfield at various diamond injector half angles into a supersonic crossflow were presented in this thesis. The numerical study was performed to improve the understanding of the flame holding potential by extending the numerical database envelop to include different injector half angles and examine the flow at Mach 2 and Mach 5. The configuration of a diamond injector shape was found to reduce the flow separation upstream, and produce an attached shock at the initial freestream interaction and the injection fluid has an increased field penetration as compared to circular injectors. The CFD studies were also aimed at providing additional information on the uses of multiple injectors for flow control. The numerical runs were performed with diamond injectors at half angles of 10?° and 20?° at a freestream Mach number of 5. The transverse counter-rotating pair of vortices found in the 15?° does not form within the 10?° and 20?° cases at freestream Mach number 5. The 10?° case had a barrel shock that became streamlined in the lateral direction. The 20?° barrel shock had a very large spanwise expansion and became streamlined in the transverse direction. In both cases the trailing edge of their barrel shocks did not form the flat â??Vâ? shape, as found in the baseline case. At Mach 2 the 10?° and 15?° cases both formed the flat â??Vâ? shape at the trailing edge of the barrel shocks, and formed the transverse counter rotating vortex pairs. The 10?° multiple injector case successfully showed the interaction shocks forming into a larger planer shock downstream of the injectors. The swept 15?° case produced interaction shocks that were too weak to properly form a planar shock downstream. This planar shock has potential for flow control. Depending on the angle of incidence of the injector fluid with the freestream flow and the half angle of the diamond injector, the planar shocks will form further upstream or downstream of the injector.

McLellan, Justin Walter

2005-08-01T23:59:59.000Z

171

Freeway ramp metering often exists in the vicinity of a signal-controlled diamond interchange, at which the surface street system and the free-  

E-Print Network (OSTI)

Freeway ramp metering often exists in the vicinity of a signal-controlled diamond interchange signal and the ramp-metering signal. The proposed control algorithm, including an adaptive diamond inter- change control and a traffic-responsive ramp-metering control were programmed with VISSIM's vehicle

Tian, Zong Z.

172

CHARACTERISTICS OF DIAMOND WINDOWS ON THE 1 MW, 110 GHz GYROTRON SYSTEMS ON THE DIII-D TOKAMAK  

SciTech Connect

Diamond disks made using the chemical vapor deposition (CVD) technique are now in common use as gyrotron output windows. The low millimeter wave losses and excellent thermal conductivity of diamond have made it possible to use such windows in gyrotrons with {approx}1 MW output power and pulse length up to and greater than 10 s. A ubiquitous characteristic of diamond gyrotron windows is the presence of apparent hot spots in the infrared images registered during rf pulses. Many of these spots are co-located with bright points seen in visible video images. The spots do not seem to compromise the integrity of the windows. Analysis of the infrared observations on several different gyrotrons operating at the DIII-D tokamak are reported.

Y.A. GORELOV; J. LOHR; R.W. CALLIS; D. PONCE

2002-08-01T23:59:59.000Z

173

A diamond anvil cell with resistive heating for high pressure and high temperature x-ray diffraction and absorption studies  

SciTech Connect

In this paper we describe a prototype of a diamond anvil cell (DAC) for high pressure/high temperature studies. This DAC combines the use of a resistive oven of 250 W power in a very small volume, associated with special conical seats for Boehler-type diamond anvils in order to have a large angular acceptance. To protect the diamond anvils from burning and to avoid the oven oxidation, the heated DAC is enclosed in a vacuum chamber. The assemblage was used to study the melting curve of germanium at high pressure (up to 20 GPa) and high temperature (up to 1200 K) using x-ray diffraction and x-ray absorption spectroscopy.

Pasternak, Sebastien; Aquilanti, Giuliana; Pascarelli, Sakura; Zhang Lin [European Synchrotron Radiation Facility, 6 rue Jules Horowitz, 38043 Grenoble, Cedex (France); Poloni, Roberta [European Synchrotron Radiation Facility, 6 rue Jules Horowitz, 38043 Grenoble, Cedex (France); Institut de Ciencia de Materials de Barcelona (CSIC), Campus de la UAB, E-08193 Bellaterra, Barcelona Spain (Spain); Canny, Bernard [IMPMC-CNRS UMR, 7590 Universite Paris VI, 140 rue de Lourmel, 75015 Paris (France); Coulet, Marie-Vanessa [IM2NP-UMR CNRS, 6242 Universite Paul Cezanne Campus de St Jerome, 13397 Marseille Cedex 20 (France)

2008-08-15T23:59:59.000Z

174

Electron emission and defect formation in the interaction of slow,highly charged ions with diamond surfaces  

DOE Green Energy (OSTI)

We report on electron emission and defect formation in theinteraction between slow (v~;0.3 vBohr) highly charged ions (SHCI) withinsulating (type IIa) and semiconducting (type IIb) diamonds. Electronemission induced by 31Pq+ (q=5 to 13), and 136Xeq+ (q=34 to 44) withkinetic energies of 9 kVxq increase linearly with the ion charge states,reaching over 100 electrons per ion for high xenon charge states withoutsurface passivation of the diamond with hydrogen. Yields from bothdiamond types are up to a factor of two higher then from reference metalsurfaces. Crater like defects with diameters of 25 to 40 nm are formed bythe impact of single Xe44+ ions. High secondary electron yields andsingle ion induced defects enable the formation of single dopant arrayson diamond surfaces.

Sideras-Haddad, E.; Shrivastava, S.; Rebuli, D.B.; Persaud, A.; Schneider, D.H.; Schenkel, T.

2006-05-31T23:59:59.000Z

175

Solar-induced chemical vapor deposition of diamond-type carbon films  

DOE Patents (OSTI)

An improved chemical vapor deposition method for depositing transparent continuous coatings of sp[sup 3]-bonded diamond-type carbon films, comprises: (a) providing a volatile hydrocarbon gas/H[sub 2] reactant mixture in a cold wall vacuum/chemical vapor deposition chamber containing a suitable substrate for said films, at pressure of about 1 to 50 Torr; and (b) directing a concentrated solar flux of from about 40 to about 60 watts/cm[sup 2] through said reactant mixture to produce substrate temperatures of about 750 C to about 950 C to activate deposition of the film on said substrate. 11 figs.

Pitts, J.R.; Tracy, C.E.; King, D.E.; Stanley, J.T.

1994-09-13T23:59:59.000Z

176

Chip-Scale Nanofabrication of Single Spins and Spin Arrays in Diamond  

SciTech Connect

We demonstrate a technique to nanofabricate nitrogen vacancy (NV) centers in diamond based on broad-beam nitrogen implantation through apertures in electron beam lithography resist. This method enables high-throughput nanofabrication of single NV centers on sub-100-nm length scales. Secondary ion mass spectroscopy measurements facilitate depth profiling of the implanted nitrogen to provide three-dimensional characterization of the NV center spatial distribution. Measurements of NV center coherence with on-chip coplanar waveguides suggest a pathway for incorporating this scalable nanofabrication technique in future quantum applications.

Toyli, David M.; Weis, Christoph D.; Fuchs, D.; Schenkel, Thomas; Awschalom, David D.

2010-07-02T23:59:59.000Z

177

Solar-induced chemical vapor deposition of diamond-type carbon films  

DOE Patents (OSTI)

An improved chemical vapor deposition method for depositing transparent continuous coatings of sp.sup.3 -bonded diamond-type carbon films, comprising: a) providing a volatile hydrocarbon gas/H.sub.2 reactant mixture in a cold wall vacuum/chemical vapor deposition chamber containing a suitable substrate for said films, at pressure of about 1 to 50 Torr; and b) directing a concentrated solar flux of from about 40 to about 60 watts/cm.sup.2 through said reactant mixture to produce substrate temperatures of about 750.degree. C. to about 950.degree. C. to activate deposition of the film on said substrate.

Pitts, J. Roland (Lakewood, CO); Tracy, C. Edwin (Golden, CO); King, David E. (Lakewood, CO); Stanley, James T. (Beaverton, OR)

1994-01-01T23:59:59.000Z

178

Pretreatment process for forming a smooth surface diamond film on a carbon-coated substrate  

DOE Patents (OSTI)

A process is disclosed for the pretreatment of a carbon-coated substrate to provide a uniform high density of nucleation sites thereon for the subsequent deposition of a continuous diamond film without the application of a bias voltage to the substrate. The process comprises exposing the carbon-coated substrate, in a microwave plasma enhanced chemical vapor deposition system, to a mixture of hydrogen-methane gases, having a methane gas concentration of at least about 4% (as measured by partial pressure), while maintaining the substrate at a pressure of about 10 to about 30 Torr during the pretreatment.

Feng, Zhu (Albany, CA); Brewer, Marilee (Goleta, CA); Brown, Ian (Berkeley, CA); Komvopoulos, Kyriakos (Orinda, CA)

1994-01-01T23:59:59.000Z

179

Possible Diamond-Like Nanoscale Structures Induced by Slow Highly-Charged Ions on Graphite (HOPG)  

Science Conference Proceedings (OSTI)

The interaction between slow highly-charged ions (SHCI) of different charge states from an electron-beam ion trap and highly oriented pyrolytic graphite (HOPG) surfaces is studied in terms of modification of electronic states at single-ion impact nanosizeareas. Results are presented from AFM/STM analysis of the induced-surface topological features combined with Raman spectroscopy. I-V characteristics for a number of different impact regions were measured with STM and the results argue for possible formation of diamond-like nanoscale structures at the impact sites.

Sideras-Haddad, E.; Schenkel, T.; Shrivastava, S.; Makgato, T.; Batra, A.; Weis, C. D.; Persaud, A.; Erasmus, R.; Mwakikunga, B.

2009-01-06T23:59:59.000Z

180

Diamond-like atomic-scale composite films: Surface properties and stability studied by STM and AFM  

DOE Green Energy (OSTI)

Amorphous ``diamond-like/quartz-like`` composites a-(C:H/Si:O) and metal containing a-(C:H/Si:O/Me) constitute a novel class of diamond-related materials with a number of unique bulk and surface properties. In order to gain a more fundamental understanding of the surface properties and stability of these solids we have performed a scanning tunneling and atomic force microscopy investigation of both a-(C:H/Si:O) and a-(C:H/Si:O/Me) films, including the effects of ion bombardment and annealing.

Dorfman, B.; Abraizov, M. [SUNY, Farmingdale, NY (United States); Pollak, F.H. [CUNY, Brooklyn, NY (United States); Eby, R. [TopoMetrix, Bedminster, NJ (United States); Rong, Z.Y. [SUNY, Stony Brook, NY (United States); Strongin, M.; Yang, X.Q. [Brookhaven National Lab., Upton, NY (United States)

1995-10-01T23:59:59.000Z

Note: This page contains sample records for the topic "ultramar diamond shamrock" 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

Carbon ion beam focusing using laser irradiated heated diamond hemispherical shells  

DOE Green Energy (OSTI)

Experiments preformed at the Los Alamos National Laboratory's Trident Laser Facility were conducted to observe the acceleration and focusing of carbon ions via the TNSA mechanism using hemispherical diamond targets. Trident is a 200TW class laser system with 80J of 1 {micro}m, short-pulse light delivered in 0.5ps, with a peak intensity of 5 x 10{sup 20} W/cm{sup 2}. Targets where Chemical Vapor Deposition (CVD) diamonds formed into hemispheres with a radius of curvature of 400{micro}m and a thickness of 5{micro}m. The accelerated ions from the hemisphere were diagnosed by imaging the shadow of a witness copper mesh grid located 2mm behind the target onto a film pack located 5cm behind the target. Ray tracing was used to determine the location of the ion focal spot. The TNSA mechanism favorably accelerates hydrogen found in and on the targets. To make the carbon beam detectable, targets were first heated to several hundred degrees Celsius using a CW, 532nm, 8W laser. Imaging of the carbon beam was accomplished via an auto-radiograph of a nuclear activated lithium fluoride window in the first layer of the film pack. The focus of the carbon ion beam was determined to be located 630 {+-} 110 {micro}m from the vertex of the hemisphere.

Offermann, Dustin T [Los Alamos National Laboratory; Flippo, Kirk A [Los Alamos National Laboratory; Gaillard, Sandrine A [Los Alamos National Laboratory

2009-01-01T23:59:59.000Z

182

Grain size dependent mechanical properties of nanocrystalline diamond films grown by hot-filament CVD  

DOE Green Energy (OSTI)

Nanocrystalline diamond (NCD) films with a thickness of {approx}6 {micro}m and with average grain sizes ranging from 60 to 9 nm were deposited on silicon wafers using a hot-filament chemical vapor deposition (HFCVD) process. These samples were then characterized with the goal to identify correlations between grain size, chemical composition and mechanical properties. The characterization reveals that our films are phase pure and exhibit a relatively smooth surface morphology. The levels of sp{sup 2}-bonded carbon and hydrogen impurities are low, and showed a systematic variation with the grain size. The hydrogen content increases with decreasing grain size, whereas the sp{sup 2} carbon content decreases with decreasing grain size. The material is weaker than single crystalline diamond, and both stiffness and hardness decrease with decreasing grain size. These trends suggest gradual changes of the nature of the grain boundaries, from graphitic in the case of the 60 nm grain size material to hydrogen terminated sp{sup 3} carbon for the 9 nm grain size material. The films exhibit low levels of internal stress and freestanding structures with a length of several centimeters could be fabricated without noticeable bending.

Wiora, M; Bruehne, K; Floeter, A; Gluche, P; Willey, T M; Kucheyev, S O; Van Buuren, A W; Hamza, A V; Biener, J; Fecht, H

2008-08-01T23:59:59.000Z

183

Single-photon emission from Ni-related color centers in CVD diamond  

E-Print Network (OSTI)

Color centers in diamond are very promising candidates among the possible realizations for practical single-photon sources because of their long-time stable emission at room temperature. The popular nitrogen-vacancy center shows single-photon emission, but within a large, phonon-broadened spectrum (~100nm), which strongly limits its applicability for quantum communication. By contrast, Ni-related centers exhibit narrow emission lines at room temperature. We present investigations on single color centers consisting of Ni and Si created by ion implantation into single crystalline IIa diamond. We use systematic variations of ion doses between 10^8/cm^2 and 10^14/cm^2 and energies between 30keV and 1.8MeV. The Ni-related centers show emission in the near infrared spectral range (~770nm to 787nm) with a small line-width (~3nm FWHM). A measurement of the intensity correlation function proves single-photon emission. Saturation measurements yield a rather high saturation count rate of 77.9 kcounts/s. Polarization dependent measurements indicate the presence of two orthogonal dipoles.

David Steinmetz; Elke Neu; Christian Hepp; Roland Albrecht; Wolfgang Bolse; Jan Meijer; Detlef Rogalla; Christoph Becher

2010-03-17T23:59:59.000Z

184

Dose rate dependence for different dosimeters and detectors: TLD, OSL, EBT films, and diamond detectors  

Science Conference Proceedings (OSTI)

Purpose: The use of laser accelerators in radiation therapy can perhaps increase the low number of proton and ion therapy facilities in some years due to the low investment costs and small size. The laser-based acceleration technology leads to a very high peak dose rate of about 10{sup 11} Gy/s. A first dosimetric task is the evaluation of dose rate dependence of clinical dosimeters and other detectors. Methods: The measurements were done at ELBE, a superconductive linear electron accelerator which generates electron pulses with 5 ps length at 20 MeV. The different dose rates are reached by adjusting the number of electrons in one beam pulse. Three clinical dosimeters (TLD, OSL, and EBT radiochromic films) were irradiated with four different dose rates and nearly the same dose. A faraday cup, an integrating current transformer, and an ionization chamber were used to control the particle flux on the dosimeters. Furthermore two diamond detectors were tested. Results: The dosimeters are dose rate independent up to 410{sup 9} Gy/s within 2% (OSL and TLD) and up to 1510{sup 9} Gy/s within 5% (EBT films). The diamond detectors show strong dose rate dependence. Conclusions: TLD, OSL dosimeters, and EBT films are suitable for pulsed beams with a very high pulse dose rate like laser accelerated particle beams.

Karsch, L.; Beyreuther, E.; Burris-Mog, T.; Kraft, S.; Richter, C.; Zeil, K.; Pawelke, J. [OncoRay-National Center for Radiation Research in Oncology, Technische Universitaet Dresden, Fetscherstr, 74, 01307 Dresden (Germany); Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiation Physics, P.O. Box 510119, 01314 Dresden (Germany); OncoRay-National Center for Radiation Research in Oncology, Technische Universitaet Dresden, Fetscherstr, 74, 01307 Dresden (Germany) and Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiation Physics, P.O. Box 510119, 01314 Dresden (Germany)

2012-05-15T23:59:59.000Z

185

FEA analysis of diamond as IMCA{close_quote}s monochromator crystal  

SciTech Connect

A great deal of effort has been make in recent years in the field of undulator high heat load optics, and currently there are several tractable options [Rev. Sci. Instrum. {bold 69}, 2792 (1994); Nucl. Instrum. Methods A {bold 266}, 517 (1988); Nucl. Instrum. Methods A {bold 239}, 555 (1993)]. Diamond crystals offer some attractive options{endash}water as the coolant, the use of established monochromator mechanisms, simpler monochromator design as compared to the use of liquid nitrogen or gallium. The use of diamond crystals as the optical elements in a double-crystal monochromator for the IMCA-CAT and MR-CAT ID beamlines has been studied. A first crystal mounting scheme using an indium-gallium eutectic as the heat transfer medium developed in collaboration with DND-CAT and M. Hart will be presented. A FEA analysis of the IMCA-CAT ID beamline arrangement using the APS undulator A as the radiaiton source will be presented. {copyright} {ital 1996 American Institute of Physics.}

Chrzas, J.; Cimpoes, S.; Ivanov, I.N. [CSRRI, Illinois Institute of Technology, 3301 S. Dearborn Street, Chicago, IL 60616 (United States)

1996-09-01T23:59:59.000Z

186

Temperature dependence of mechanical stiffness and dissipation in ultrananocrystalline diamond films grown by the HFCVD techinque.  

SciTech Connect

We have characterized mechanical properties of ultrananocrystalline diamond (UNCD) thin films grown using the hot filament chemical vapor deposition (HFCVD) technique at 680 C, significantly lower than the conventional growth temperature of -800 C. The films have -4.3% sp{sup 2} content in the near-surface region as revealed by near edge x-ray absorption fine structure spectroscopy. The films, -1 {micro}m thick, exhibit a net residual compressive stress of 370 {+-} 1 MPa averaged over the entire 150 mm wafer. UNCD microcantilever resonator structures and overhanging ledges were fabricated using lithography, dry etching, and wet release techniques. Overhanging ledges of the films released from the substrate exhibited periodic undulations due to stress relaxation. This was used to determine a biaxial modulus of 838 {+-} 2 GPa. Resonant excitation and ring-down measurements in the kHz frequency range of the microcantilevers were conducted under ultrahigh vacuum (UHV) conditions in a customized UHV atomic force microscope system to determine Young's modulus as well as mechanical dissipation of cantilever structures at room temperature. Young's modulus is found to be 790 {+-} 30 GPa. Based on these measurements, Poisson's ratio is estimated to be 0.057 {+-} 0.038. The quality factors (Q) of these resonators ranged from 5000 to 16000. These Q values are lower than theoretically expected from the intrinsic properties of diamond. The results indicate that surface and bulk defects are the main contributors to the observed dissipation in UNCD resonators.

Adiga, V. P.; Sumant, A. V.; Suresh, S.; Gudeman, C.; Auciello, O.; Carlisle, J. A.; Carpick, R. W.; Materials Science Division; Univ. of Pennsylvania; Innovative Micro Tech.; Advanced Diamond Tech.

2009-06-01T23:59:59.000Z

187

Salsbury and Diamond: Automated Testing of HVAC Systems for Commissioning -1 -Automated Testing of HVAC Systems for Commissioning  

E-Print Network (OSTI)

and Diamond: Automated Testing of HVAC Systems for Commissioning - 1 - Automated Testing of HVAC Systems This paper describes an approach to the automation of the commissioning of HVAC systems. The approach of many HVAC systems is limited more by poor installation, commissioning, and maintenance than by poor

188

Bonding and Stability of Hybrid Diamond/Nanotube O.A. SHENDEROVA*, D. ARESHKIN and D.W. BRENNER  

E-Print Network (OSTI)

Bonding and Stability of Hybrid Diamond/Nanotube Structures O.A. SHENDEROVA*, D. ARESHKIN and D.W precursors", Nature 364, 607. [6] Shenderova, O. and Brenner, D.W. (1997) "Coexistence of two carbon phases.T. and Brenner, D.W. (1997) "Mechanical Properties of nanotubule fibers and composites determined from

Brenner, Donald W.

189

A comparative study of three different chemical vapor deposition techniques of carbon nanotube growth on diamond films  

Science Conference Proceedings (OSTI)

This paper compares between the methods of growing carbon nanotubes (CNTs) on diamond substrates and evaluates the quality of the CNTs and the interfacial strength. One potential application for these materials is a heat sink/spreader for high-power ...

Betty T. Quinton, Paul N. Barnes, Chakrapani V. Varanasi, Jack Burke, Bang-Hung Tsao, Kevin J. Yost, Sharmila M. Mukhopadhyay

2013-01-01T23:59:59.000Z

190

Program plan for the development of advanced synthetic-diamond drill bits for hard-rock drilling  

DOE Green Energy (OSTI)

Eight companys have teamed with Sandia Labs to work on five projects as part of a cooperative effort to advance the state of the ar in synthetic-diamond drill bit design and manufacture. DBS (a Baroid Company), Dennis Tool Company, Hughes Christensen Company, Maurer Engineering, Megadiamond, Security Diamond Products, Slimdril International, and Smith International. Objective of each project is to develop advanced bit technology that results in new commercial products with longer bit life and higher penetration rates in hard formations. Each project explores a different approach to synthetic-diamond cutter and bit design and, consequently, uses different approaches to developing the technology. Each of these approaches builds or the respective companies` capabilities and current product interests. Sandia`s role is to assure integration of the individual projects into a coherent program and tc provide unique testing and analytical capabilities where needed. One additional company, Amoco Production Research, will provide synthetic-diamond drill bit research expertise and field testing services for each project in the program.

Glowka, D.A.; Schafer, D.M.

1993-09-01T23:59:59.000Z

191

A comparison of diamond growth rate using in-liquid and conventional plasma chemical vapor deposition methods  

Science Conference Proceedings (OSTI)

In order to make high-speed deposition of diamond effective, diamond growth rates for gas-phase microwave plasma chemical vapor deposition and in-liquid microwave plasma chemical vapor deposition are compared. A mixed gas of methane and hydrogen is used as the source gas for the gas-phase deposition, and a methanol solution of ethanol is used as the source liquid for the in-liquid deposition. The experimental system pressure is in the range of 60-150 kPa. While the growth rate of diamond increases as the pressure increases, the amount of input microwave energy per unit volume of diamond is 1 kW h/mm{sup 3} regardless of the method used. Since the in-liquid deposition method provides a superior cooling effect through the evaporation of the liquid itself, a higher electric input power can be applied to the electrodes under higher pressure environments. The growth rate of in-liquid microwave plasma chemical vapor deposition process is found to be greater than conventional gas-phase microwave plasma chemical vapor deposition process under the same pressure conditions.

Takahashi, Yoshiyuki; Toyota, Hiromichi; Nomura, Shinfuku; Mukasa, Shinobu [Graduate School of Science and Engineering, Ehime University, 3 Bunkyo-cho, Matsuyama 790-8577 (Japan); Inoue, Toru [Geodynamics Research Center, Ehime University, 2-5 Bunkyo-cho, Matsuyama 790-8577 (Japan)

2009-06-01T23:59:59.000Z

192

Howard J. Diamond, U.S. GCOS Program Manager, National Climatic Data Center (NCDC), National Oceanic and Atmospheric Administration (NOAA)  

E-Print Network (OSTI)

Howard J. Diamond, U.S. GCOS Program Manager, National Climatic Data Center (NCDC), National and System Development Climate Data Management Tropical Cyclone Data and Information Work Communicating System Program Manager Director, World Data Center for Meteorology Formal NOAA Lead on U.S. climate bi

193

Published in J. Mat. Sci. Lettr. 18 (1999) 427-430 Selective Patterned Deposition of Diamond using a New Technique  

E-Print Network (OSTI)

of centrifugation on diamond deposition. It is generally believed that atomic hydrogen at the growth surface deposition were unsuitable for experiments on a centrifuge. Thus, a new closed chemical vapor transport and removal of gas [4]. Graphite was used as a carbon source in the presence of hydrogen at low pressure

Regel, Liya L.

194

Development and evaluation of operational strategies for providing an integrated diamond interchange ramp-metering control system  

E-Print Network (OSTI)

Diamond interchanges and their associated ramps are where the surface street arterial system and the freeway system interface. Historically, these two elements of the system have been operated with little or no coordination between the two. Therefore, there is a lack of both analysis tools and operational strategies for considering them as an integrated system. One drawback of operating the ramp-metering system and the diamond interchange system in isolation is that traffic from the ramp, particularly if it is metered, can spill back into the diamond interchange, causing both congestion and safety concerns at the diamond interchange. While flushing the ramp queues by temporarily suspending ramp metering has been the primary strategy for preventing queue spillback, it can result in freeway system breakdown, which would affect the entire system's efficiency. The aim of this research was to develop operational strategies for managing an integrated diamond interchange ramp-metering system (IDIRMS). Enhanced modeling methodologies were developed for an IDIRMS. A computer model named DRIVE (Diamond Interchange and Ramp Metering Integration Via Evaluation) was developed, which was characterized as a mesoscopic simulation and analysis model. DRIVE incorporated the enhanced modeling methodologies developed in this study and could be used to perform system analysis for an IDIRMS given a set of system input parameters and variables. DRIVE was validated against a VISSIM microscopic simulation model, and general agreement was found between the two models. System operational characteristics were investigated using DRIVE to gain a better understanding of the system features. Integrated control strategies (ICS) were developed based on the two commonly used diamond interchange phasing schemes, basic three-phase and TTI four-phase. The ICS were evaluated using VISSIM microscopic simulation under three general traffic demand scenarios: low, medium, and high, as characterized by the volume-to-capacity ratios at the metered ramps. The results of the evaluation indicate that the integrated operations through an adaptive signal control system were most effective under the medium traffic demand scenario by preventing or delaying the onset of ramp-metering queue flush, thereby minimizing freeway breakdown and system delays.

Tian, Zongzhong

2003-05-01T23:59:59.000Z

195

High-Temperature Experiments using a Resistively-Heated High-Pressure Membrane Diamond Anvil Cell  

SciTech Connect

A reliable high-performance heating method using resistive heaters and a membrane driven diamond anvil cell (mDAC) is presented. Two micro-heaters are mounted in a mDAC and use electrical power of less than 150 W to achieve sample temperatures up to 1200 K. For temperature measurement we use two K-type thermocouples mounted near the sample. The approach can be used for in-situ Raman spectroscopy and x-ray diffraction at high pressures and temperatures. A W-Re alloy gasket material permits stable operation of mDAC at high temperature. Using this method, we made an isothermal compression at 900 K to pressures in excess of 100 GPa and isobaric heating at 95 GPa to temperatures in excess of 1000 K. As an example, we present high temperature Raman spectroscopy measurements of nitrogen at high pressures.

Jenei, Z; Visbeck, K; Cynn, H; Yoo, C; Evans, W

2009-04-22T23:59:59.000Z

196

Theoretical tool movement required to diamond turn an off-axis paraboloid on axis  

SciTech Connect

High-quality, off-axis parabolic reflectors, required by the CTR and laser-fusion programs at Lawrence Livermore Laboratory (LLL) and other ERDA laboratories, are currently manufactured by hand. There are several drawbacks to this method, including lead times of up to a year, costs in excess of $75,000 for a small reflector, and unsatisfactory limits to the tolerances obtainable. This situation has led to a search for cheaper and more accurate methods of manufacturing off-axis paraboloids. An alternative method, turning the workpiece about its axis on a diamond-turning machine, is presented, and the equations describing the necessary tool movement are derived. A discussion of a particular case suggests that the proposed technique is feasible. (auth)

Thompson, D.C.

1975-12-19T23:59:59.000Z

197

Application of polycrystalline diamond compact bits in the Kuparuk River Field, Alaska  

SciTech Connect

In soft to medium-hard clays and shales, polycrystalline diamond compact (PDC) bits have proved economically successful in the Kuparuk River field, AK. Through the redesign and modification of PDC bits and rig equipment, the necessary operating parameters have been achieved, and the use of PDC bits has become routine. These bits are typically run with a bit weight of 30,000 to 40,000 lbf (133 to 178 kN), a standpipe pressure of 4,000 psi (27 MPa), a pump rate of 400 to 450 gal/min (1.5 to 1.7 m/sup 3//min), and a rotary speed of 150 to 200 rev/min. Use of these high operating parameters saves about $50,000 per PDC bit when compared with roller-cone bits.

Balkenbush, R.J.; Onisko, J.E.

1985-07-01T23:59:59.000Z

198

Wear mechanisms for polycrystalline-diamond compacts as utilized for drilling in geothermal environments. Final report  

DOE Green Energy (OSTI)

The work, which was performed in the period from 12/6/79 to 9/30/81 included: (1) rock cutting experiments with single point polycrystalline sintered diamond compact (PDC) cutters to quantitatively determine cutter wear rates and identify wear modes, (2) PDC rock cutting experiments to measure temperatures developed and examine the effects of tool wear, cutting parameters and coolant flow rates on temperature generation, (3) assisting in performing full scale laboratory drilling experiments with PDC bits, using preheated air to simulate geothermal drilling conditions, and in analyzing and reporting the experimental results, and (4) acting in a consulting role with the purpose of establishing design specifications for geothermal hard matrix PDC bits to be procured by Sandia Laboratories for test purposes.

Hibbs, L.E. Jr.; Sogoian, G.C.

1983-05-01T23:59:59.000Z

199

High-precision measurements of the diamond Hugoniot in and above the melt region  

Science Conference Proceedings (OSTI)

High-precision measurements of the diamond principal Hugoniot have been made at pressures between 6 and 19 Mbar. Shock velocities were determined with 0.3%-1.1% precision using a velocity interferometer. Impedance-matching analysis, incorporating systematic uncertainties in the equation of state of the quartz standard, was used to determine the Hugoniot with 1.2%-2.7% precision in density. The results are in good agreement with published ab initio calculations, which predict a small negative melt slope along the Hugoniot, but disagree with previous laser-driven shock wave experiments, which had observed a large density increase in the melt region. In the extensive solid-liquid coexistence regime between 6 and 10 Mbar, the present measurements indicate that the mixed phase is a few percent more dense than what would be expected from a simple interpolation between liquid and solid Hugoniots.

Hicks, D. G.; Celliers, P. M.; Bradley, D. K.; Eggert, J. H.; Collins, G. W. [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States); Boehly, T. R. [Laboratory for Laser Energetics, University of Rochester, New York 14623 (United States); McWilliams, R. S. [Lawrence Livermore National Laboratory, Livermore, California 94550 (United States); University of California, Berkeley, California 94720 (United States); Jeanloz, R. [University of California, Berkeley, California 94720 (United States)

2008-11-01T23:59:59.000Z

200

High precision measurements of the diamond Hugoniot in and above the melt region  

Science Conference Proceedings (OSTI)

High precision laser-driven shock wave measurements of the diamond principal Hugoniot have been made at pressures between 6 and 19 Mbar. Shock velocities were determined with 0.3-1.1% precision using a velocity interferometer. Impedance matching analysis, incorporating systematic errors in the equation-of-state of the quartz standard, was used to determine the Hugoniot with 1.2-2.7% precision in density. The results are in good agreement with published ab initio calculations which predict a small negative melt slope along the Hugoniot, but disagree with previous laser-driven shock wave experiments which had observed a large density increase in the melt region. In the extensive solid-liquid coexistence regime between 6 and 10 Mbar these measurements indicate that the mixed phase may be slightly more dense than would be expected from a simple interpolation between liquid and solid Hugoniots.

Hicks, D; Boehly, T; Celliers, P; Bradley, D; Eggert, J; McWilliams, R S; Collins, G

2008-08-05T23:59:59.000Z

Note: This page contains sample records for the topic "ultramar diamond shamrock" 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

Controlling the quantum dynamics of a mesoscopic spin bath in diamond  

E-Print Network (OSTI)

Understanding and mitigating decoherence is a key challenge for quantum science and technology. The main source of decoherence for solid-state spin systems is the uncontrolled spin bath environment. Here, we demonstrate quantum control of a mesoscopic spin bath in diamond at room temperature that is composed of electron spins of substitutional nitrogen impurities. The resulting spin bath dynamics are probed using a single nitrogen-vacancy (NV) centre electron spin as a magnetic field sensor. We exploit the spin bath control to dynamically suppress dephasing of the NV spin by the spin bath. Furthermore, by combining spin bath control with dynamical decoupling, we directly measure the coherence and temporal correlations of different groups of bath spins. These results uncover a new arena for fundamental studies on decoherence and enable novel avenues for spin-based magnetometry and quantum information processing.

G. de Lange; T. van der Sar; M. S. Blok; Z. H. Wang; V. V. Dobrovitski; R. Hanson

2011-04-24T23:59:59.000Z

202

Richard Diamond  

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

on Home Energy Audits: The Role of Auditors, Labels, Reports, and Audit Tools on Homeowner Decision---Making.., 2012. Download: PDF (18.47 MB) Ingle, Aaron, Mithra M. Moezzi,...

203

Band offsets of Al{sub 2}O{sub 3} and HfO{sub 2} oxides deposited by atomic layer deposition technique on hydrogenated diamond  

SciTech Connect

High-k oxide insulators (Al{sub 2}O{sub 3} and HfO{sub 2}) have been deposited on a single crystalline hydrogenated diamond (H-diamond) epilayer by an atomic layer deposition technique at temperature as low as 120 Degree-Sign C. Interfacial electronic band structures are characterized by X-ray photoelectron spectroscopy. Based on core-level binding energies and valence band maximum values, valence band offsets are found to be 2.9 {+-} 0.2 and 2.6 {+-} 0.2 eV for Al{sub 2}O{sub 3}/H-diamond and HfO{sub 2}/H-diamond heterojunctions, respectively. Band gaps of the Al{sub 2}O{sub 3} and HfO{sub 2} have been determined to be 7.2 {+-} 0.2 and 5.4 {+-} 0.2 eV by measuring O 1s energy loss spectra, respectively. Both the Al{sub 2}O{sub 3}/H-diamond and HfO{sub 2}/H-diamond heterojunctions are concluded to be type-II staggered band configurations with conduction band offsets of 1.2 {+-} 0.2 and 2.7 {+-} 0.2 eV, respectively.

Liu, J. W.; Liao, M. Y.; Imura, M. [Optical and Electronic Materials Unit, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); Koide, Y. [Optical and Electronic Materials Unit, National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan); Nanofabrication Platform, NIMS, 1-2-1 Sengen, Tsukuba, Ibaraki 305-0047 (Japan); Center of Materials Research for Low Carbon Emission, NIMS, 1-1 Namiki, Tsukuba, Ibaraki 305-0044 (Japan)

2012-12-17T23:59:59.000Z

204

Dynamic polarization of single nuclear spins by optical pumping of NV color centers in diamond at room temperature  

E-Print Network (OSTI)

We report a versatile method to efficiently polarize single nuclear spins in diamond, which is based on optical pumping of a single NV color center and mediated by a level-anti crossing in its excited state. A nuclear spin polarization higher than 98% is achieved at room temperature for the 15N nuclear spin associated to the NV center, corresponding to $\\mu$K effective nuclear spin temperature. We then show simultaneous deterministic initialization of two nuclear spins (13C and 15N) in close vicinity to a NV defect. Such robust control of nuclear spin states is a key ingredient for further scaling up of nuclear-spin based quantum registers in diamond.

V. Jacques; P. Neumann; J. Beck; M. Markham; D. Twitchen; J. Meijer; F. Kaiser; G. Balasubramanian; F. Jelezko; J. Wrachtrup

2008-08-01T23:59:59.000Z

205

Preparation of diamond-like carbon and boron nitirde films by high-intensity pulsed ion beam deposition  

SciTech Connect

Intense ion beams (300-keV C{sup +}, O{sup +}, and H{sup +}, 20--30 kA, 50 to 400-ns pulsewidth, up to 0.3-Hz repetition rate) were used to prepare diamond-like carbon (DLC) and boron nitride (BN) films. Deposition rates of up to 25{plus_minus}5 nm/pulse were obtained with instantaneous rates exceeding 1 mm/s. Most films were uniform, light brown, translucent, and nonporous with some micron-size particulates. Raman and parallel electron energy loss spectroscopy indicated the presence of DLC. The films possessed favorable electron field-emission characteristics desirable for cold-cathode displays. Transmission electron microscopy (TEM) and transmission electron diffraction (TED) revealed that the C films contained diamond crystals with 25 to 125-nm grain size. BN films were composed of hexagonal, cubic and wurtzite phases.

Rej, D.J.; Davis, H.A. [Los Alamos National Lab., NM (United States); Remnev, G.E. [Tomsk Polytechnic Univ., Tomsk (Russian Federation). Nuclear Physics Institute.] [and others

1995-05-01T23:59:59.000Z

206

Hard x-ray monochromator with milli-electron volt bandwidth for high-resolution diffraction studies of diamond crystals  

SciTech Connect

We report on design and performance of a high-resolution x-ray monochromator with a spectral bandwidth of {Delta}E{sub X}{approx_equal} 1.5 meV, which operates at x-ray energies in the vicinity of the backscattering (Bragg) energy E{sub H} = 13.903 keV of the (008) reflection in diamond. The monochromator is utilized for high-energy-resolution diffraction characterization of diamond crystals as elements of advanced x-ray crystal optics for synchrotrons and x-ray free-electron lasers. The monochromator and the related controls are made portable such that they can be installed and operated at any appropriate synchrotron beamline equipped with a pre-monochromator.

Stoupin, Stanislav; Shvyd'ko, Yuri; Shu Deming; Khachatryan, Ruben; Xiao, Xianghui; DeCarlo, Francesco; Goetze, Kurt; Roberts, Timothy; Roehrig, Christian; Deriy, Alexey [Advanced Photon Source, Argonne National Laboratory, Illinois 60439 (United States)

2012-02-15T23:59:59.000Z

207

Hard x-ray monochromator with milli-electron volt bandwidth for high-resolution diffraction studies of diamond crystals.  

Science Conference Proceedings (OSTI)

We report on design and performance of a high-resolution x-ray monochromator with a spectral bandwidth of {Delta}E{sub x} {approx_equal} 1.5 meV, which operates at x-ray energies in the vicinity of the backscattering (Bragg) energy E{sub H} = 13.903 keV of the (008) reflection in diamond. The monochromator is utilized for high-energy-resolution diffraction characterization of diamond crystals as elements of advanced x-ray crystal optics for synchrotrons and x-ray free-electron lasers. The monochromator and the related controls are made portable such that they can be installed and operated at any appropriate synchrotron beamline equipped with a pre-monochromator.

Stoupin, S.; Shvydko, Y.; Shu, D.; Khachatryan, R.; Xiao, X. (X-Ray Science Division)

2012-01-01T23:59:59.000Z

208

Modeling of microwave discharges of H{sub 2} admixed with CH{sub 4} for diamond deposition  

Science Conference Proceedings (OSTI)

Microwave discharges of H{sub 2} admixed with CH{sub 4} in a moderate-pressure quartz bell jar reactor used for diamond deposition are studied numerically. Special attention was devoted to high-power densities which provide the most effective way for producing high-quality diamond films. First, a one-dimensional radial model describing the coupled phenomena of chemistry, energy transfer, as well as species and energy transport along the reactor's radial coordinate was developed. Species densities predicted with the model were compared with measurements with infrared tunable diode laser spectroscopy, resulting in validation of the model. Second, a one-dimensional axial model was used to describe the plasma flow along the reactor axis in a region between the reactor end wall and the substrate surface. This model was particularly useful for studying the plasma behavior in the vicinity of the substrate surface, where thermal and composition gradients are large. Both the radial and axial transport models are based on the same discharge model in which the plasma is described as a thermochemically nonequilibrium flow with different energy distributions for heavy species and electrons. The chemistry was described with a model containing 28 species and 131 reactions. The electron temperature, the gas temperature, and the species concentration were determined by solving a coupled set of equations. A wide range of experimental conditions used for diamond deposition was simulated, from low microwave power density (9 W cm{sup -3}, i.e., 600 W, 2500 Pa, and T{sub g}{approx}2200 K) to high-power density (30 W cm{sup -3}, i.e., 2 kW, 12 000 Pa, and T{sub g}{approx}3200 K). The main chemical paths were identified, and the major species, transport effects, and reaction pathways that govern diamond deposition plasmas are discussed.

Lombardi, G.; Hassouni, K.; Stancu, G.-D.; Mechold, L.; Roepcke, J.; Gicquel, A. [Laboratoire d'Ingenierie des Materiaux et des Hautes Pressions, Centre National de la Recherche Scientifique (CNRS) UPR 1311-Universite Paris 13-99, av. J.B. Clement, 93430 Villetaneuse (France); INP-Greifswald, Friedrich-Ludwig-Jahn-Strasse 19, 17489 Greifswald (Germany); Laser Components GmbH, 82140 Olching, Werner-von-Siemens-Strasse 15 (Germany); INP-Greifswald, Friedrich-Ludwig-Jahn-Strasse 19, 17489 Greifswald (Germany); Laboratoire d'Ingenierie des Materiaux et des Hautes Pressions, Centre National de la Recherche Scientifique (CNRS) UPR 1311-Universite Paris 13-99, av. J.B. Clement, 93430 Villetaneuse (France)

2005-09-01T23:59:59.000Z

209

Microfabrication of controlled-geometry samples for the laser-heated diamond-anvil cell using focused ion beam technology  

SciTech Connect

The pioneering of x-ray diffraction with in situ laser heating in the diamond-anvil cell has revolutionized the field of high-pressure mineral physics, expanding the ability to determine high-pressure, high-temperature phase boundaries and equations of state. Accurate determination of high-pressure, high-temperature phases and densities in the diamond-anvil cell rely upon collinearity of the x-ray beam with the center of the laser-heated spot. We present the development of microfabricated samples that, by nature of their design, will have the sample of interest in the hottest portion of the sample. We report initial successes with a simplified design using a Pt sample with dimensions smaller than the synchrotron-based x-ray spot such that it is the only part of the sample that absorbs the heating laser ensuring that the x-rayed volume is at the peak hotspot temperature. Microfabricated samples, synthesized using methods developed at The Ohio State University's Mineral Physics Laboratory and Campus Electron Optics Facility, were tested at high P-T conditions in the laser-heated diamond-anvil cell at beamline 16 ID-B of the Advanced Photon Source. Pt layer thicknesses of {le} 0.8 {micro}m absorb the laser and produce accurate measurements on the relative equations of state of Pt and PtC. These methods combined with high-purity nanofabrication techniques will allow for extension by the diamond-anvil cell community to multiple materials for high-precision high-pressure, high-temperature phase relations, equations of state, melting curves, and transport properties.

Pigott, Jeffrey S.; Reaman, Daniel M.; Panero, Wendy R. (OSU)

2012-02-06T23:59:59.000Z

210

Dynamic Diamond Anvil Cell (dDAC): A novel device for studying the dynamic-pressure properties of materials  

SciTech Connect

We have developed a unique device, a dynamic diamond anvil cell (dDAC), which repetitively applies a time-dependent load/pressure profile to a sample. This capability allows studies of the kinetics of phase transitions and metastable phases at compression (strain) rates of up to 500 GPa/sec ({approx}0.16 s{sup -1} for a metal). Our approach adapts electromechanical piezoelectric actuators to a conventional diamond anvil cell design, which enables precise specification and control of a time-dependent applied load/pressure. Existing DAC instrumentation and experimental techniques are easily adapted to the dDAC to measure the properties of a sample under the varying load/pressure conditions. This capability addresses the sparsely studied regime of dynamic phenomena between static research (diamond anvil cells and large volume presses) and dynamic shock-driven experiments (gas guns, explosive and laser shock). We present an overview of a variety of experimental measurements that can be made with this device.

Evans, W J; Yoo, C; Lee, G W; Cynn, H; Lipp, M J; Visbeck, K

2007-02-23T23:59:59.000Z

211

An in situ approach to study trace element partitioning in the laser heated diamond anvil cell  

Science Conference Proceedings (OSTI)

Data on partitioning behavior of elements between different phases at in situ conditions are crucial for the understanding of element mobility especially for geochemical studies. Here, we present results of in situ partitioning of trace elements (Zr, Pd, and Ru) between silicate and iron melts, up to 50 GPa and 4200 K, using a modified laser heated diamond anvil cell (DAC). This new experimental set up allows simultaneous collection of x-ray fluorescence (XRF) and x-ray diffraction (XRD) data as a function of time using the high pressure beamline ID27 (ESRF, France). The technique enables the simultaneous detection of sample melting based to the appearance of diffuse scattering in the XRD pattern, characteristic of the structure factor of liquids, and measurements of elemental partitioning of the sample using XRF, before, during and after laser heating in the DAC. We were able to detect elements concentrations as low as a few ppm level (2-5 ppm) on standard solutions. In situ measurements are complimented by mapping of the chemical partitions of the trace elements after laser heating on the quenched samples to constrain the partitioning data. Our first results indicate a strong partitioning of Pd and Ru into the metallic phase, while Zr remains clearly incompatible with iron. This novel approach extends the pressure and temperature range of partitioning experiments derived from quenched samples from the large volume presses and could bring new insight to the early history of Earth.

Petitgirard, S.; Mezouar, M. [European Synchrotron Radiation Facility (ESRF), 6 rue Jules Horowitz, BP 220, 38043 Grenoble (France); Borchert, M.; Appel, K.; Liermann, H.-P. [Deutsches Elektronen-Synchrotron (DESY), Notkestrasse 85, 22607 Hamburg (Germany); Andrault, D. [Universite Blaise Pascal, Laboratoire des Magmas and Volcans, 5 rue Kessler 63038, Clermont-Ferrand (France)

2012-01-15T23:59:59.000Z

212

Shock-Compressed Diamond: Melt, Insulator-Conductor and Polymeric-Atomic Transitions  

Science Conference Proceedings (OSTI)

Temperatures measured on the shock-Hugoniot of diamond reveal melting between 650 ({+-} 60) GPa and 9000 ({+-} 800) K and 1090 ({+-} 50) GPa and 8400 ({+-} 800) K, with a heat of fusion of {approx} 25 {+-} 10 kJ/mole and a negative Clapeyron slope {partial_derivative}T/{partial_derivative}P|{sub melt} = -5 {+-} 3 K/GPa. Thus, the fluid is denser than the compressed solid, and optical reflectivity measurements show it to be metallic. Hugoniot-temperature measurements extending to over 4000 GPa (40 Mbar) and 115,000 K suggest de-polymerization of a dense covalently-bonded fluid to an atomic state between 10,000 and 30,000 K. These experimental results indicate that carbon present deep inside planets such as Uranus and Neptune could be solid for through-going convection, whereas stable stratification would allow for the presence of fluid metallic carbon at depth; in either case, the presence of carbon could potentially affect planetary seismic normal modes.

Eggert, J; Hicks, D G; Celliers, P M; Bradley, D K; McWilliams, R S; Jeanloz, R; Miller, J E; Boehly, T R

2007-08-16T23:59:59.000Z

213

Effect of gigaelectron volt Au-ion irradiation on the characteristics of ultrananocrystalline diamond films  

SciTech Connect

The effect of 2.245 GeV Au-ion irradiation/postannealing processes on the electron field emission (EFE) properties of ultrananocrystalline diamond (UNCD) films was investigated. Au-ion irradiation with a fluence of around 8.4x10{sup 13} ions/cm{sup 2} is required to induce a large improvement in the EFE properties of the UNCD films. Postannealing the Au-ion irradiated films at 1000 deg. C for 1 h slightly degraded the EFE properties of the films but the resulting EFE behavior was still markedly superior to that of pristine UNCD films. Transmission electron microscopy examinations revealed that the EFE properties of the UNCD films are primarily improved by Au-ion irradiation/postannealing processes because of the formation of nanographites along the trajectory of the irradiating ions, which results in an interconnected path for electron transport. In contrast, the induction of grain growth process due to Au-ion irradiation in UNCD films is presumed to insignificantly degrade the EFE properties for the films as the aggregates are scarcely distributed and do not block the electron conducting path.

Chen, Huang-Chin; Teng, Kuang-Yau; Tang, Chen-Yau; Lin, I-Nan [Department of Physics, Tamkang University, Tamsui, Taiwan 251 (China); Sundaravel, Balakrishnan [Materials Science Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102 (India); Amirthapandian, Sankarakumar [Materials Science Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102 (India); Institut fuer Halbleiteroptik und Funktionelle Grenzflaechen, Universitaet Stuttgart, Allmandring 3, 70569 Stuttgart (Germany)

2010-12-15T23:59:59.000Z

214

Ultrananocrystalline diamond cantilever wide dynamic range acceleration/vibration/pressure sensor  

DOE Patents (OSTI)

An ultrananocrystalline diamond (UNCD) element formed in a cantilever configuration is used in a highly sensitive, ultra-small sensor for measuring acceleration, shock, vibration and static pressure over a wide dynamic range. The cantilever UNCD element may be used in combination with a single anode, with measurements made either optically or by capacitance. In another embodiment, the cantilever UNCD element is disposed between two anodes, with DC voltages applied to the two anodes. With a small AC modulated voltage applied to the UNCD cantilever element and because of the symmetry of the applied voltage and the anode-cathode gap distance in the Fowler-Nordheim equation, any change in the anode voltage ratio V1/N2 required to maintain a specified current ratio precisely matches any displacement of the UNCD cantilever element from equilibrium. By measuring changes in the anode voltage ratio required to maintain a specified current ratio, the deflection of the UNCD cantilever can be precisely determined. By appropriately modulating the voltages applied between the UNCD cantilever and the two anodes, or limit electrodes, precise independent measurements of pressure, uniaxial acceleration, vibration and shock can be made. This invention also contemplates a method for fabricating the cantilever UNCD structure for the sensor.

Krauss, Alan R. (Naperville, IL); Gruen, Dieter M. (Downers Grove, IL); Pellin, Michael J. (Naperville, IL); Auciello, Orlando (Bolingbrook, IL)

2002-07-23T23:59:59.000Z

215

Ultrananocrystalline Diamond Cantilever Wide Dynamic Range Acceleration/Vibration /Pressure Sensor  

DOE Patents (OSTI)

An ultrananocrystalline diamond (UNCD) element formed in a cantilever configuration is used in a highly sensitive, ultra-small sensor for measuring acceleration, shock, vibration and static pressure over a wide dynamic range. The cantilever UNCD element may be used in combination with a single anode, with measurements made either optically or by capacitance. In another embodiment, the cantilever UNCD element is disposed between two anodes, with DC voltages applied to the two anodes. With a small AC modulated voltage applied to the UNCD cantilever element and because of the symmetry of the applied voltage and the anode-cathode gap distance in the Fowler-Nordheim equation, any change in the anode voltage ratio V1/V2 required to maintain a specified current ratio precisely matches any displacement of the UNCD cantilever element from equilibrium. By measuring changes in the anode voltage ratio required to maintain a specified current ratio, the deflection of the UNCD cantilever can be precisely determined. By appropriately modulating the voltages applied between the UNCD cantilever and the two anodes, or limit electrodes, precise independent measurements of pressure, uniaxial acceleration, vibration and shock can be made. This invention also contemplates a method for fabricating the cantilever UNCD structure for the sensor.

Krauss, Alan R. (Naperville, IL); Gruen, Dieter M. (Downers Grove, IL); Pellin, Michael J. (Naperville, IL); Auciello, Orlando (Bolingbrook, IL)

2003-09-02T23:59:59.000Z

216

Thermal conductivity of diamond-loaded glues for the ATLAS particle physics detector  

E-Print Network (OSTI)

The ATLAS experiment is one of two large general-purpose particle detectors at the Large Hadron Collider (LHC) at the CERN laboratory in Geneva, Switzerland. ATLAS has been collecting data from the collisions of protons since December 2009, in order to investigate the conditions that existed during the early Universe and the origins of mass, and other topics in fundamental particle physics. The innermost layers of the ATLAS detector will be exposed to the most radiation over the first few years of operation at the LHC. In particular, the layer closest to the beam pipe, the B-layer, will degrade over time due to the added radiation. To compensate for its degradation, it will be replaced with an Insertable B-Layer (IBL) around 2016. The design of and R&D for the IBL is ongoing, as the hope is to use the most current technologies in the building of this new sub-detector layer. One topic of interest is the use of more thermally conductive glues in the construction of the IBL, in order to facilitate in the dissipation of heat from the detector. In this paper the measurement and use of highly thermally conductive glues, in particular those that are diamond-loaded, will be discussed. The modified transient plane source technique for thermal conductivity is applied in characterizing the glues across a wide temperature range.

E. A. Ouellette; A. Harris

2010-08-04T23:59:59.000Z

217

Storing Hydrogen, by Enhancing Diamond Powder Properties under Hydrogen Plasma with CaF2 and KF for Use in Fuel Cells  

Science Conference Proceedings (OSTI)

A fuel cell is like a battery that instead of using electricity to recharge itself, it uses hydrogen. In the fuel cell industry, one of the main problems is storing hydrogen in a safe way and extracting it economically. Gaseous hydrogen requires high pressures which could be very dangerous in case of a collision. The success of hydrogen use depends largely on the development of an efficient storage and release method. In an effort to develop a better hydrogen storage system for fuel cells technology this research investigates the use of 99% pure diamond powder for storing hydrogen. Mixing this powder with a calcium fluoride and potassium fluoride compound in its solid form and treating the surface of the powder with hydrogen plasma, modifies the surface of the diamond. After some filtration through distilled water and drying, the modified diamond is treated with hydrogen. We expect hydrogen to be attracted to the diamond powder surface in higher quantities due to the CaF2 and KF treatment. Due to the large surface area of diamond nanopowder and the electronegative terminal bonds of the fluorine particles on the structure's surface, to the method shows promise in storing high densities of hydrogen.

Ochoa, Franklyn E. Colmenares [Undergraduate Mechanical Engineering, Polytechnic University of Puerto Rico (Puerto Rico)

2006-12-04T23:59:59.000Z

218

Optimization of Deep Drilling Performance - Development and Benchmark Testing of Advanced Diamond Product Drill Bits & HP/HT Fluids to Significantly Improve Rates of Penetration  

SciTech Connect

This document details the progress to date on the OPTIMIZATION OF DEEP DRILLING PERFORMANCE--DEVELOPMENT AND BENCHMARK TESTING OF ADVANCED DIAMOND PRODUCT DRILL BITS AND HP/HT FLUIDS TO SIGNIFICANTLY IMPROVE RATES OF PENETRATION contract for the year starting October 2004 through September 2005. The industry cost shared program aims to benchmark drilling rates of penetration in selected simulated deep formations and to significantly improve ROP through a team development of aggressive diamond product drill bit--fluid system technologies. Overall the objectives are as follows: Phase 1--Benchmark ''best in class'' diamond and other product drilling bits and fluids and develop concepts for a next level of deep drilling performance; Phase 2--Develop advanced smart bit-fluid prototypes and test at large scale; and Phase 3--Field trial smart bit--fluid concepts, modify as necessary and commercialize products. As of report date, TerraTek has concluded all Phase 1 testing and is planning Phase 2 development.

Alan Black; Arnis Judzis

2005-09-30T23:59:59.000Z

219

Fundamental studies of the chemical vapor deposition of diamond. Final technical report, April 1, 1988--December 31, 1994  

SciTech Connect

We submit here a final technical report for the research program entitled: Fundamental Studies of the Chemical Vapor Deposition of Diamond, DOE Grant No. DE-FG05-88ER45345-M006. This research program was initiated in 1988 under the direction of the late Professor David A. Stevenson and was renewed in 1992. Unfortunately, at the end of 1992, just as the last phase of this work was getting underway, Professor Stevenson learned that he had developed mesothelioma, a form of cancer based on asbestos. Professor Stevenson died from that disease in February of 1994. Professor William D. Nix, the Chairman of the Materials Science department at Stanford was named the Principal Investigator. Professor Nix has assembled this final technical report. Much of the work of this grant was conducted by Mr. Paul Dennig, a graduate student who will receive his Ph.D. degree from Stanford in a few months. His research findings are described in the chapters of this report and in the papers published over the past few years. The main discovery of this work was that surface topology plays a crucial role in the nucleation of diamond on silicon. Dennig and his collaborators demonstrated this by showing that diamond nucleates preferentially at the tips of asperities on a silicon surface rather than in the re-entrant comers at the base of such asperities. Some of the possible reasons for this effect are described in this report. The published papers listed on the next page of this report also describe this research. Interested persons can obtain copies of these papers from Professor Nix at Stanford. A full account of all of the research results obtained in this work is given in the regular chapters that follow this brief introduction. In addition, interested readers will want to consult Mr. Dennig`s Ph.D. dissertation when it is made available later this year.

Nix, W.D.

1995-05-01T23:59:59.000Z

220

Energy levels and decoherence properties of single electron and nuclear spins in a defect center in diamond  

E-Print Network (OSTI)

The coherent behavior of the single electron and single nuclear spins of a defect center in diamond and a 13C nucleus in its vicinity, respectively, are investigated. The energy levels associated with the hyperfine coupling of the electron spin of the defect center to the 13C nuclear spin are analyzed. Methods of magnetic resonance together with optical readout of single defect centers have been applied in order to observe the coherent dynamics of the electron and nuclear spins. Long coherence times, in the order of microseconds for electron spins and tens of microseconds for nuclear spins, recommend the studied system as a good experimental approach for implementing a 2-qubit gate.

I. Popa; T. Gaebel; M. Domhan; C. Wittmann; F. Jelezko; J. Wrachtrup

2004-09-12T23:59:59.000Z

Note: This page contains sample records for the topic "ultramar diamond shamrock" 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

Mn-Stabilized Zirconia: From Imitation Diamonds to a New Potential High-T{sub C} Ferromagnetic Spintronics Material  

SciTech Connect

From the basis of ab initio electronic structure calculations which include the effects of thermally excited magnetic fluctuations, we predict Mn-stabilized cubic zirconia to be ferromagnetic above 500 K. We find this material, which is well known both as an imitation diamond and as a catalyst, to be half-metallic with the majority and minority spin Mn impurity states lying in zirconia's wide gap. The Mn concentration can exceed 40%. The high-T{sub C} ferromagnetism is robust to oxygen vacancy defects and to how the Mn impurities are distributed on the Zr fcc sublattice. We propose this ceramic as a promising future spintronics material.

Ostanin, S. [Max-Planck-Institut fuer Mikrostrukturphysik, Weinberg 2, D-06120 Halle (Saale) (Germany); Department of Physics, University of Warwick, Coventry CV4 7AL (United Kingdom); Ernst, A.; Sandratskii, L. M.; Bruno, P. [Max-Planck-Institut fuer Mikrostrukturphysik, Weinberg 2, D-06120 Halle (Saale) (Germany); Daene, M.; Hergert, W.; Mertig, I. [Martin-Luther-Universitaet Halle-Wittenberg, Fachbereich Physik, D-06099 Halle (Germany); Hughes, I. D.; Staunton, J. B. [Department of Physics, University of Warwick, Coventry CV4 7AL (United Kingdom); Kudrnovsky, J. [Max-Planck-Institut fuer Mikrostrukturphysik, Weinberg 2, D-06120 Halle (Saale) (Germany); Institute of Physics, Academy of Sciences of the Czech Republic, Na Slovance 2, CZ-18221 Prague 8 (Czech Republic)

2007-01-05T23:59:59.000Z

222

Robust control of entanglement in a Nitrogen-vacancy centre coupled to a Carbon-13 nuclear spin in diamond  

E-Print Network (OSTI)

We address a problem of generating a robust entangling gate between electronic and nuclear spins in the system of a single nitrogen-vacany centre coupled to a nearest Carbon-13 atom in diamond against certain types of systematic errors such as pulse-length and off-resonance errors. We analyse the robustness of various control schemes: sequential pulses, composite pulses and numerically-optimised pulses. We find that numerically-optimised pulses, produced by the gradient ascent pulse engineering algorithm (GRAPE), are more robust than the composite pulses and the sequential pulses. The optimised pulses can also be implemented in a faster time than the composite pulses.

R. S. Said; J. Twamley

2009-03-23T23:59:59.000Z

223

Conformational flexibility and molecular interactions of an archaeal homologue of the Shwachman-Bodian-Diamond syndrome protein  

E-Print Network (OSTI)

of Leeds, Leeds, LS2 9JT, UK and 7Current address: Architcture et Fonction des Macromolcules Biologiques UMR 9068, Case 932, 163 Avenue de Luminy, 13288 Marseille cedex 9, France Email: C Leong Ng - clng@mrc-lmb.cam.ac.uk; David G Waterman - david... .waterman@diamond.ac.uk; Eugene V Koonin - koonin@ncbi.nlm.nih.gov; Alison D Walters - adw501@york.ac.uk; James PJ Chong - jpjc1@york.ac.uk; Michail N Isupov - M.Isupov@exeter.ac.uk; Andrey A Lebedev - lebedev@ysbl.york.ac.uk; David HJ Bunka - bmbdhjb@bmb.leeds.ac.uk; Peter G...

Ng, C Leong; Waterman, David G; Koonin, Eugene V; Walters, Alison D; Chong, James P J; Isupov, Michail N; Lebedev, Andrey A; Bunka, David H J; Stockley, Peter G; Ortiz-Lombardia, Miguel; Antson, Alfred A

2009-05-19T23:59:59.000Z

224

Structure and Energy of the 90 degree sign Partial Dislocation in Diamond: A Combined Ab Initio and Elasticity Theory Analysis  

Science Conference Proceedings (OSTI)

The core structure and stability of the 90 degree sign partial dislocation in diamond is studied within isotropic elasticity theory and ab initio total energy calculations. The double-period reconstruction is found to be more stable than the single-period reconstruction for a broad range of stress states. The analysis of the ab initio results shows further that elasticity theory is valid for dislocation spacings as small as 10-20 Angstrom, thus allowing ab initio calculations to provide reliable parameters for continuum theory analysis. (c) 2000 The American Physical Society.

Blase, X. [Department of Physics, University of California, Berkeley, California 94720 (United States); Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States); NERSC, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States); Departement de Physique des Materiaux, U.M.R. No. 5586, 43 Bd du 11 Novembre 1918, 69622 Villeurbanne Cedex, (France); Lin, Karin [Department of Physics, University of California, Berkeley, California 94720 (United States); Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States); Canning, A. [NERSC, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States); Louie, S. G. [Department of Physics, University of California, Berkeley, California 94720 (United States); Chrzan, D. C. [Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States); Department of Materials Science and Mineral Engineering, University of California, Berkeley, California 94720 (United States)

2000-06-19T23:59:59.000Z

225

Studies of the frictional heating of polycrystalline diamond compact drag tools during rock cutting  

DOE Green Energy (OSTI)

A numerical-analytical model is developed to analyze temperatures in polycrystalline diamond compact (PDC) drag tools subject to localized frictional heating at a worn flat area and convective cooling at exposed lateral surfaces. Experimental measurements of convective heat transfer coefficients of PDC cutters in a uniform crossflow are presented and used in the model to predict temperatures under typical drilling conditions with fluid flow. The analysis compares favorably with measurements of frictional temperatures in controlled cutting tests on Tennessee marble. It is found that average temperatures at the wearflat contact zone vary directly with frictional force per unit area and are proportional to the one-half power of the cutting speed at the velocities investigated. Temperatures are found to be much more sensitive to decreases in the dynamic friction by lubrication than to increases in convective cooling rates beyond currently achievable levels with water or drilling fluids. It is shown that use of weighted drilling fluids may actually decrease cooling rates compared to those achieved with pure water. It is doubtful that tool temperatures can be kept below critical levels (750/sup 0/C) if air is employed as the drilling fluid. The degree of tool wear is found to have a major influence on the thermal response of the friction contact zone, so that for equal heating per contact area, a worn tool will run much hotter than a sharp tool. It is concluded that tool temperatures may be kept below critical levels with conventional water or mud cooling as long as the fluid provides good cutter-rock lubrication.

Ortega, A.; Glowka, D.A.

1982-06-01T23:59:59.000Z

226

Fundamentals and technology for monolithically integrated RF MEMS switches with ultra-nanocrystaline diamond dielectric/CMOS devices.  

SciTech Connect

Most current capacitive RF-MEMS switch technology is based on conventional dielectric materials such as SiO{sub 2} and Si{sub 3}N{sub 4}. However, they suffer not only from charging problems but also stiction problems leading to premature failure of an RF-MEMS switch. Ultrananocrystalline diamond (UNCD{sup (R)}) (2-5 nm grains) and nanocrystalline diamond (NCD) (10-100 nm grains) films exhibit one of the highest Young's modulus ({approx} 980-1100 GPa) and demonstrated MEMS resonators with the highest quality factor (Q {ge} 10,000 in air for NCD) today, they also exhibit the lowest force of adhesion among MEMS/NEMS materials ({approx}10 mJ/m{sup 2}-close to van der Waals attractive force for UNCD) demonstrated today. Finally, UNCD exhibits dielectric properties (fast discharge) superior to those of Si and SiO{sub 2}, as shown in this paper. Thus, UNCD and NCD films provide promising platform materials beyond Si for a new generation of important classes of high-performance MEMS/NEMS devices.

Auciello, O.; Sumant, A.; Goldsmith, C.; O'Brien, S.; Sampath, S.; Gudeman, C; Wang, W.; Hwang, J.; Swonger, J.; Carlisle, J.; Balachandran, S.; MEMtronics Corp.; Innovative Micro Technology; Lehigh Univ.; Peregrine Semiconductor; Advanced Diamond Technologies

2010-01-01T23:59:59.000Z

227

Development of a Beam Condition Monitor System for the Experimental Areas of the LHC Using CVD Diamond  

E-Print Network (OSTI)

The CERN Large Hadron Collider (LHC) will store 2808 bunches per colliding beam, each bunch consisting of 10^11 protons at an energy of 7 TeV. If there is a failure in an element of the accelerator, the resulting beam losses could cause damages not only to the machine but also to the experiments. A Beam Condition Monitor (BCM) is foreseen to monitor fast increments of particle fluxes near the interaction point and, if necessary, to generate an abort signal to the LHC accelerator control to dump the beams. The system is being developed initially for the CMS experiment but is sufficiently general to find potential applications elsewhere. Due to its high radiation hardness, CVD diamond has been studied for use as the BCM sensor. Various samples of CVD diamond have been characterized extensively with a Sr-90 source and high intensity test beams in order to assess the capabilities of such sensors and to study whether this detector technology is suitable for a BCM system. The results from these investigations are p...

Fernndez-Hernando, L

2004-01-01T23:59:59.000Z

228

Diamond Particle Detector Properties during High Fluence Material Damage Tests and their Future Applications for Machine Protection in the LHC  

E-Print Network (OSTI)

Experience with LHC machine protection (MP) during the last three years of operation shows that the MP systems sufficiently protect the LHC against damage in case of failures leading to beam losses with a time constant exceeding 1ms. An unexpected fast beam loss mechanism, called UFOs [1], was observed, which could potentially quench superconducting magnets. For such fast losses, but also for better understanding of slower losses, an improved understanding of the loss distribution within a bunch train is required [2]. Diamond particle detectors with bunch-by-bunch resolution and high dynamic range have been developed and successfully tested in the LHC and in experiments to quantify the damage limits of LHC components. This paper will focus on experience gained in use of diamond detectors. The properties of these detectors were measured during high-fluence material damage tests in CERNs Hi-RadMat facility. The results will be discussed and compared to the cross-calibration with FLUKA simulations. Future app...

Burkart, F; Borburgh, J; Dehning, B; Di Castro, M; Griesmayer, E; Lechner, A; Lendaro, J; Loprete, F; Losito, R; Montesano, S; Schmidt, R; Wollmann, D; Zerlauth, M

2013-01-01T23:59:59.000Z

229

Smaller Footprint Drilling System for Deep and Hard Rock Environments; Feasibility of Ultra-High-Speed Diamond Drilling  

SciTech Connect

The two phase program addresses long-term developments in deep well and hard rock drilling. TerraTek believes that significant improvements in drilling deep hard rock will be obtained by applying ultra-high rotational speeds (greater than 10,000 rpm). The work includes a feasibility of concept research effort aimed at development that will ultimately result in the ability to reliably drill 'faster and deeper' possibly with smaller, more mobile rigs. The principle focus is on demonstration testing of diamond bits rotating at speeds in excess of 10,000 rpm to achieve high rate of penetration (ROP) rock cutting with substantially lower inputs of energy and loads. The significance of the 'ultra-high rotary speed drilling system' is the ability to drill into rock at very low weights on bit and possibly lower energy levels. The drilling and coring industry today does not practice this technology. The highest rotary speed systems in oil field and mining drilling and coring today run less than 10,000 rpm - usually well below 5,000 rpm. This document provides the progress through two phases of the program entitled 'Smaller Footprint Drilling System for Deep and Hard Rock Environments: Feasibility of Ultra-High-Speed Diamond Drilling' for the period starting 30 June 2003 and concluding 31 March 2009. The accomplishments of Phases 1 and 2 are summarized as follows: (1) TerraTek reviewed applicable literature and documentation and convened a project kick-off meeting with Industry Advisors in attendance (see Black and Judzis); (2) TerraTek designed and planned Phase I bench scale experiments (See Black and Judzis). Improvements were made to the loading mechanism and the rotational speed monitoring instrumentation. New drill bit designs were developed to provided a more consistent product with consistent performance. A test matrix for the final core bit testing program was completed; (3) TerraTek concluded small-scale cutting performance tests; (4) Analysis of Phase 1 data indicated that there is decreased specific energy as the rotational speed increases; (5) Technology transfer, as part of Phase 1, was accomplished with technical presentations to the industry (see Judzis, Boucher, McCammon, and Black); (6) TerraTek prepared a design concept for the high speed drilling test stand, which was planned around the proposed high speed mud motor concept. Alternative drives for the test stand were explored; a high speed hydraulic motor concept was finally used; (7) The high speed system was modified to accommodate larger drill bits than originally planned; (8) Prototype mud turbine motors and the high speed test stand were used to drive the drill bits at high speed; (9) Three different rock types were used during the testing: Sierra White granite, Crab Orchard sandstone, and Colton sandstone. The drill bits used included diamond impregnated bits, a polycrystalline diamond compact (PDC) bit, a thermally stable PDC (TSP) bit, and a hybrid TSP and natural diamond bit; and (10) The drill bits were run at rotary speeds up to 5500 rpm and weight on bit (WOB) to 8000 lbf. During Phase 2, the ROP as measured in depth of cut per bit revolution generally increased with increased WOB. The performance was mixed with increased rotary speed, with the depth cut with the impregnated drill bit generally increasing and the TSP and hybrid TSP drill bits generally decreasing. The ROP in ft/hr generally increased with all bits with increased WOB and rotary speed. The mechanical specific energy generally improved (decreased) with increased WOB and was mixed with increased rotary speed.

TerraTek, A Schlumberger Company

2008-12-31T23:59:59.000Z

230

Phlogopite and Quartz Lamellae in Diamond-bearing Diopside from Marbles of the Kokchetav Massif Kazakhstan: Exsolution or Replacement Reaction  

Science Conference Proceedings (OSTI)

Exsolution lamellae of pyroxene in garnet (grt), coesite in titanite and omphacite from UHPM terranes are widely accepted as products of decompression. However, interpretation of oriented lamellae of phyllosilicates, framework silicates and oxides as a product of decompression of pyroxene is very often under debate. Results are presented here of FIB-TEM, FEG-EMP and synchrotron-assisted infrared (IR) spectroscopy studies of phlogopite (Phlog) and phlogopite + quartz (Qtz) lamellae in diamond-bearing clinopyroxene (Cpx) from ultra-high pressure (UHP) marble. These techniques allowed collection of three-dimensional information from the grain boundaries of both the single (phlogopite), two-phase lamellae (phlogopite + quartz), and fluid inclusions inside of diamond included in K-rich Cpx and understanding their relationships and mechanisms of formation. The Cpx grains contain in their cores lamellae-I, which are represented by topotactically oriented extremely thin lamellae of phlogopite (that generally are two units cell wide but locally can be seen to be somewhat broader) and microdiamond. The core composition is: (Ca{sub 0.94}K{sub 0.04}Na{sub 0.02})(Al{sub 0.06}Fe{sub 0.08}Mg{sub 0.88})(Si{sub 1.98}Al{sub 0.02})O{sub 6.00}. Fluid inclusions rich in K and Si are recognized in the core of the Cpx, having no visible connections to the lamellae-I. Lamellar-II inclusions consist of micron-size single laths of phlogopite and lens-like quartz or slightly elongated phlogopite + quartz intergrowths; all are situated in the rim zone of the Cpx. The composition of the rim is (Ca{sub 0.95}Fe{sub 0.03}Na{sub 0.02})(Al{sub 0.05}Fe{sub 0.05}Mg{sub 0.90})Si{sub 2}O{sub 6}, and the rim contains more Ca, Mg than the core, with no K there. Such chemical tests support our microstructural observations and conclusion that the phlogopite lamellae-I are exsolved from the K-rich Cpx-precursor during decompression. It is assumed that Cpx-precursor was also enriched in H{sub 2}O, because diamond included in the core of this Cpx contains fluid inclusions. The synchrotron IR spectra of such diamond record the presence of OH{sup -} stretching and H{sub 2}O bending motion regions. Lamellar-II inclusions are interpreted as forming partly because of modification of the lamellae-i in the presence of fluid enriched in K, Fe and Si during deformation of the host diopside; the latter is probably related to the shallower stage of exhumation of the UHP marble. This study emphasizes that in each case to understand the mechanism of lamellar inclusion formation more detailed studies are needed combining both compositional, structural and three-dimensional textural features of lamellar inclusions and their host.

L Dobrzhinetskaya; R Wirth; D Rhede; Z Liu; H Green

2011-12-31T23:59:59.000Z

231

Coupling of a single diamond nanocrystal to a whispering-gallery microcavity: Photon transport benefitting from Rayleigh scattering  

Science Conference Proceedings (OSTI)

We study the Rayleigh scattering induced by a diamond nanocrystal in a whispering-gallery-microcavity-waveguide coupling system and find that it plays a significant role in the photon transportation. On the one hand, this study provides insight into future solid-state cavity quantum electrodynamics aimed at understanding strong-coupling physics. On the other hand, benefitting from this Rayleigh scattering, effects such as dipole-induced transparency and strong photon antibunching can occur simultaneously. As a potential application, this system can function as a high-efficiency photon turnstile. In contrast to B. Dayan et al. [Science 319, 1062 (2008)], the photon turnstiles proposed here are almost immune to the nanocrystal's azimuthal position.

Liu Yongchun; Xiao Yunfeng; Li Beibei; Jiang Xuefeng; Li Yan; Gong Qihuang [State Key Lab for Mesoscopic Physics, School of Physics, Peking University, Beijing 100871 (China)

2011-07-15T23:59:59.000Z

232

A simple external resistance heating diamond anvil cell and its application for synchrotron radiation x-ray diffraction  

SciTech Connect

A simple external heating assemblage allowing diamond anvil cell experiments at pressures up to 34 GPa and temperatures up to 653 K was constructed. This cell can be connected to the synchrotron radiation conveniently. The design and construction of this cell are fully described, as well as its applications for x-ray diffraction. Heating is carried out by using an external-heating system, which is made of NiCr resistance wire, and the temperature was measured by a NiCr-NiSi or PtRh-Pt thermocouple. We showed the performance of the new system by introducing the phase transition study of cinnabar ({alpha}-HgS) and thermal equation of state study of almandine at high pressure and temperature with this cell.

Fan Dawei; Zhou Wenge; Liu Yonggang; Xie Hongsen [Institute of Geochemistry of Earth's Deep Interior Materials and Fluid Interaction, Chinese Academy of Sciences, Guiyang 550002 (China); Wei Shuyi [Institute of Geochemistry of Earth's Deep Interior Materials and Fluid Interaction, Chinese Academy of Sciences, Guiyang 550002 (China); Graduate School of Chinese Academy of Sciences, Beijing 100049 (China); Ma Maining [Graduate School of Chinese Academy of Sciences, Beijing 100049 (China)

2010-05-15T23:59:59.000Z

233

OPTIMIZATION OF DEEP DRILLING PERFORMANCE--DEVELOPMENT AND BENCHMARK TESTING OF ADVANCED DIAMOND PRODUCT DRILL BITS & HP/HT FLUIDS TO SIGNIFICANTLY IMPROVE RATES OF PENETRATION  

Science Conference Proceedings (OSTI)

The industry cost shared program aims to benchmark drilling rates of penetration in selected simulated deep formations and to significantly improve ROP through a team development of aggressive diamond product drill bit--fluid system technologies. Overall the objectives are as follows: Phase 1--Benchmark ''best in class'' diamond and other product drilling bits and fluids and develop concepts for a next level of deep drilling performance; Phase 2--Develop advanced smart bit-fluid prototypes and test at large scale; and Phase 3--Field trial smart bit-fluid concepts, modify as necessary and commercialize products. As of report date, TerraTek has concluded all major preparations for the high pressure drilling campaign. Baker Hughes encountered difficulties in providing additional pumping capacity before TerraTek's scheduled relocation to another facility, thus the program was delayed further to accommodate the full testing program.

Alan Black; Arnis Judzis

2004-10-01T23:59:59.000Z

234

The induction of a graphite-like phase on diamond films by a Fe-coating/post-annealing process to improve their electron field emission properties  

Science Conference Proceedings (OSTI)

The electron field emission (EFE) process for diamond films was tremendously enhanced by Fe-coating and post-annealing processes. Microstructural analysis indicates that the mechanism for the improvement in the EFE process is the formation of nanographites with good crystallinity that surround the Fe (or Fe{sub 3}C) nanoclusters. Presumably the nanographites were formed via the reaction of Fe clusters with diamond films, viz. by the dissolution of carbons into Fe (or Fe{sub 3}C) clusters and the reprecipitation of carbon species to the surface of the clusters, a process similar to the growth of carbon nanotubes via Fe clusters as catalyst. Not only is a sufficiently high post-annealing temperature (900 deg. C) required but also a highly active reducing atmosphere (NH{sub 3}) is needed to give a proper microstructure for enhancing the EFE process. The best EFE properties are obtained by post-annealing the Fe-coated diamond films at 900 deg. C in an NH{sub 3} environment for 5 min. The EFE behavior of the films can be turned on at E{sub 0} = 1.9 V/{mu}m, attaining a large EFE current density of 315 {mu}A/cm{sup 2} at an applied field of 8.8 V/{mu}m (extrapolation using the Fowler-Nordheim model leads to J{sub e} = 40.7 mA/cm{sup 2} at a 20 V/{mu}m applied field).

Huang, Pin-Chang; Shih, Wen-Ching [Graduate Institute in Electro-Optical Engineering, Tatung University, Taipei 104, Taiwan (China); Chen, Huang-Chin; Lin, I-Nan [Department of Physics, Tamkang University, Tamsui, New-Taipei 251, Taiwan (China)

2011-04-15T23:59:59.000Z

235

Surface damages in diamond by Ar/O{sub 2} plasma and their effect on the electrical and electrochemical characteristics of boron-doped layers  

Science Conference Proceedings (OSTI)

Epitaxial single crystal and boron-doped diamond layers were exposed to reactive ion etching in Ar/O{sub 2} plasma (rf power of 25 W and self-bias of 100 V); and the electrical, structural, and electrochemical characteristics of the exposed surface were investigated. Angle-resolved x-ray photoemission spectroscopy (XPS) measurements revealed a nonuniform layer of amorphous carbon at the exposed surface with an average thickness of approximately 4 nm, as confirmed also by atomic force microscopy profiling of selectively etched areas. On highly boron-doped diamond, the plasma-induced damages resulted also in a nonconductive surface layer. This damaged and insulating surface layer remained resistant to graphite-etching chemicals and to rf oxygen plasma but it was removed completely in microwave hydrogen plasma at 700 deg. C. The surface characteristics after the H-plasma process followed by wet chemical oxidation were restored back to the initial state, as confirmed by XPS. Such ''recovery'' treatment had been applied to an all-diamond submicrometer electrode array initially patterned by an Ar/O{sub 2} plasma etching. The electrochemical characteristics of this electrode array were improved by more than two orders of magnitude, approaching theoretical limit for the given geometrical configuration.

Denisenko, A.; Pietzka, C.; Scharpf, J.; Kohn, E. [Institute of Electron Devices and Circuits, University of Ulm, 89069 Ulm (Germany); Romanyuk, A. [Institute of Physics, University of Basel, 4056 Basel (Switzerland)

2010-10-15T23:59:59.000Z

236

Experimental Approach to Controllably Vary Protein Oxidation While Minimizing Electrode Adsorption for Boron-Doped Diamond Electrochemical Surface Mapping Applications  

Science Conference Proceedings (OSTI)

Oxidative protein surface mapping has become a powerful approach for measuring the solvent accessibility of folded protein structures. A variety of techniques exist for generating the key reagent hydroxyl radicals for these measurements; however, many of these approaches require use of radioactive sources or caustic oxidizing chemicals. The purpose of this research was to evaluate and optimize the use of boron-doped diamond (BDD) electrochemistry as a highly accessible tool for producing hydroxyl radicals as a means to induce a controllable level of oxidation on a range of intact proteins. These experiments utilize a relatively high flow rates to reduce protein residence time inside the electrochemical flow chamber, along with a unique cell activation approach to improve control over the intact protein oxidation yield. Studies were conducted to evaluate the level of protein adsorption onto the electrode surface. This report demonstrates a robust protocol for the use of BDD electrochemistry and high performance LC-MS/MS as a high-throughput experimental pipeline for probing higher order protein structure, and illustrates how it is complementary to predictive computational modeling efforts.

McClintock, Carlee [ORNL; Hettich, Robert {Bob} L [ORNL

2013-01-01T23:59:59.000Z

237

Superhard behaviour, low residual stress, and unique structure in diamond-like carbon films by simple bilayer approach  

Science Conference Proceedings (OSTI)

Simple bilayer approach is proposed for synthesizing hard and superhard diamond-like carbon (DLC) coatings with reduced residual stress. For this, M/DLC bilayer (M = Ti and Cu) structures are grown using hybrid system involving radio frequency (RF)-sputtering and RF-plasma enhanced chemical vapor deposition techniques. Ti/DLC bilayer deposited at negative self bias of 100 V shows superhard behaviour with hardness (H) as 49 GPa. Cu/DLC bilayer grown at self bias of 100 V exhibits hard behaviour with H as 22.8 GPa. The hardness of Ti/DLC (Cu/DLC) bilayer gets changed from superhard (hard) to hard (moderate hard) regime, when the self bias is raised to 300 V. Residual stress in Ti/DLC (Cu/DLC) bilayer is found to be significantly low that varies in the range of 1 GPa-1.65 GPa (0.8 GPa-1.6 GPa). The microstructure and morphology are studied by Raman spectroscopy, scanning electron microscopy (SEM), and atomic force microscopy (AFM). SEM and AFM pictures reveal the creation of nanostructured features in the deposited bilayers. Raman, SEM, and AFM analyses are correlated with the nano-mechanical properties. Owing to excellent nano-mechanical properties, these bilayers can find their direct industrial applications as hard and protective coatings.

Dwivedi, Neeraj [Physics of Energy Harvesting Division, National Physical Laboratory (CSIR), KS Krishnan Road, New Delhi 110 012 (India); Department of Physics, Indian Institute of Technology Delhi, New Delhi 110 016 (India); Kumar, Sushil [Physics of Energy Harvesting Division, National Physical Laboratory (CSIR), KS Krishnan Road, New Delhi 110 012 (India); Malik, Hitendra K. [Department of Physics, Indian Institute of Technology Delhi, New Delhi 110 016 (India)

2012-07-15T23:59:59.000Z

238

Functionalization of Hydrogen-free Diamond-like Carbon Films using Open-air Dielectric Barrier Discharge Atmospheric Plasma Treatments  

SciTech Connect

A dielectric barrier discharge (DBD) technique has been employed to produce uniform atmospheric plasmas of He and N2 gas mixtures in open air in order to functionalize the surface of filtered-arc deposited hydrogen-free diamond-like carbon (DLC) films. XPS measurements were carried out on both untreated and He/N2 DBD plasma treated DLC surfaces. Chemical states of the C 1s and N 1s peaks were collected and used to characterize the surface bonds. Contact angle measurements were also used to record the short- and long-term variations in wettability of treated and untreated DLC. In addition, cell viability tests were performed to determine the influence of various He/N2 atmospheric plasma treatments on the attachment of osteoblast MC3T3 cells. Current evidence shows the feasibility of atmospheric plasmas in producing long-lasting variations in the surface bonding and surface energy of hydrogen-free DLC and consequently the potential for this technique in the functionalization of DLC coated devices.

Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA; Instituto de Materiales de Madrid, C.S.I.C., Cantoblanco, 28049 Madrid, Spain; Instituto de Quimica-Fisica" Rocasolano" C.S.I.C., 28006 Madrid, Spain; Mahasarakham University, Mahasarakham 44150, Thailand; CASTI, CNR-INFM Regional Laboratory, L' Aquila 67100, Italy; SUNY Upstate Medical University, Syracuse, NY 13210, USA; Endrino, Jose; Endrino, J. L.; Marco, J. F.; Poolcharuansin, P.; Phani, A.R.; Allen, M.; Albella, J. M.; Anders, A.

2007-12-28T23:59:59.000Z

239

Hydrogen effect on the morphology and structure of 3D porous titanium in the HFCVD-diamond growth environment  

Science Conference Proceedings (OSTI)

Titanium hydride was obtained from hydrogenation process on pure titanium (Ti) using a hot filament chemical vapor deposition reactor. The Ti samples were produced from powder metallurgy technique and present three-dimensional porosity. The experimental parameters of the hydrogenation process were controlled in a similar way as those for diamond growth. The pressure inside the reactor was kept at 6.6 kPa for a H{sub 2} flow rate of 100 sccm and hydrogenation time of 1 hour. The distance from the filaments to the Ti surface was kept at 5 mm. Hydrogenation processes were carried out at different temperatures of 773, 873, 973 and 1073 K. The morphology of the titanium hydrides was studied by scanning electron microscopy. The images showed an increase in the roughness titanium surface as well as the formation of cracks due to the hydride titanium precipitation. The structure of these titanium hydrides was analyzed by X-ray diffraction, performed through {theta}-2{theta} scans from 1 to 15{sup o} grazing incident angle. The results revealed that the temperature enhanced the titanium hydride concentration in the samples with a predominant precipitation of TiH phase for the four temperatures studied. - Highlights: {yields} Hydrogen quickly spread out in the Ti matrix reacting and generating TiH phases. {yields} The higher the hydrogenation temperature the higher the amount of TiH formation. {yields} The volume increasing associated with the TiH formation caused tensions in the Ti metallic matrix. {yields} The TiH increases the Ti surface roughness influencing the grain size reduction.

Braga, N.A., E-mail: neilabraga@ufam.edu.br [Departamento de Quimica, Instituto de Ciencias Exatas, Universidade Federal do Amazonas, UFAM, 69077-000, Manaus, Am (Brazil); Ferreira, N.G., E-mail: neidenei@las.inpe.br [Instituto Nacional de Pesquisas Espaciais, INPE, 12245-970, Sao Jose dos Campos, SP (Brazil); Baldan, M.R., E-mail: baldan@las.inpe.br [Instituto Nacional de Pesquisas Espaciais, INPE, 12245-970, Sao Jose dos Campos, SP (Brazil)

2011-10-15T23:59:59.000Z

240

An Industry/DOE Program to Develop and Benchmark Advanced Diamond Product Drill Bits and HP/HT Drilling Fluids to Significantly Improve Rates of Penetration  

Science Conference Proceedings (OSTI)

A deep drilling research program titled 'An Industry/DOE Program to Develop and Benchmark Advanced Diamond Product Drill Bits and HP/HT Drilling Fluids to Significantly Improve Rates of Penetration' was conducted at TerraTek's Drilling and Completions Laboratory. Drilling tests were run to simulate deep drilling by using high bore pressures and high confining and overburden stresses. The purpose of this testing was to gain insight into practices that would improve rates of penetration and mechanical specific energy while drilling under high pressure conditions. Thirty-seven test series were run utilizing a variety of drilling parameters which allowed analysis of the performance of drill bits and drilling fluids. Five different drill bit types or styles were tested: four-bladed polycrystalline diamond compact (PDC), 7-bladed PDC in regular and long profile, roller-cone, and impregnated. There were three different rock types used to simulate deep formations: Mancos shale, Carthage marble, and Crab Orchard sandstone. The testing also analyzed various drilling fluids and the extent to which they improved drilling. The PDC drill bits provided the best performance overall. The impregnated and tungsten carbide insert roller-cone drill bits performed poorly under the conditions chosen. The cesium formate drilling fluid outperformed all other drilling muds when drilling in the Carthage marble and Mancos shale with PDC drill bits. The oil base drilling fluid with manganese tetroxide weighting material provided the best performance when drilling the Crab Orchard sandstone.

TerraTek

2007-06-30T23:59:59.000Z

Note: This page contains sample records for the topic "ultramar diamond shamrock" from the National Library of EnergyBeta (NLEBeta).
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241

Spectroscopic diagnostics and modeling of Ar/H{sub 2}/CH{sub 4} microwave discharges used for nanocrystalline diamond deposition  

Science Conference Proceedings (OSTI)

In this paper Ar/H{sub 2}/CH{sub 4} microwave discharges used for nanocrystalline diamond chemical vapor deposition in a bell-jar cavity reactor were characterized by both experimental and modeling investigations. Discharges containing 1% CH{sub 4} and H{sub 2} percentages ranging between 2% and 7% were analyzed as a function of the input microwave power under a pressure of 200 mbar. Emission spectroscopy and broadband absorption spectroscopy were carried out in the UV-visible spectral range in order to estimate the gas temperature and the C{sub 2} density within the plasma. Infrared tunable diode laser absorption spectroscopy was achieved in order to measure the mole fractions of carbon-containing species such as CH{sub 4}, C{sub 2}H{sub 2}, and C{sub 2}H{sub 6}. A thermochemical model was developed and used in order to estimate the discharge composition, the gas temperature, and the average electron energy in the frame of a quasihomogeneous plasma assumption. Experiments and calculations yielded consistent results with respect to plasma temperature and composition. A relatively high gas temperature ranging between 3000 and 4000 K is found for the investigated discharge conditions. The C{sub 2} density estimated from both experiments and modeling are quite high compared with what is generally reported in the literature for the same kind of plasma system. It ranges between 10{sup 13} and 10{sup 14} cm{sup -3} in the investigated power range. Infrared absorption measurements and model predictions indicate quite low densities of methane and acetylene, while the atomic carbon density calculated by the model ranges between 10{sup 13} and 10{sup 15} cm{sup -3}. The methane and hydrogen introduced in the feed gas are subject to a strong dissociation, which results in a surprisingly high H-atom population with mole fraction ranging between 0.04 and 0.16. Result analysis shows that the power coupling efficiency would range between 70% and 90%, which may at least explain the relatively high values obtained, as compared with those reported in the literature for similar discharges, for gas temperature and C{sub 2} population. The high H-atom densities obtained in this work would indicate that growing nanocrystalline diamond films would experience a very high etching. Simulation results also confirm that sp species would play a key role in the surface chemistry that governs the diamond growth.

Lombardi, G.; Hassouni, K.; Benedic, F.; Mohasseb, F.; Roepcke, J.; Gicquel, A. [Laboratoire d'Ingenierie des Materiaux et des Hautes Pressions, UPR 1311 CNRS, Universite Paris 13, 99 Avenue J.B. Clement, 93430 Villetaneuse (France); INP Greifswald, Friedrich-Ludwig-Jahn-Strasse 19, 17489 Greifswald (Germany); Laboratoire d'Ingenierie des Materiaux et des Hautes Pressions, UPR 1311 CNRS, Universite Paris 13, 99 Avenue J.B. Clement, 93430 Villetaneuse (France)

2004-12-01T23:59:59.000Z

242

Characterization of hyperfine interaction between single electron and single nuclear spins in diamond assisted by quantum beat from the nuclear spin  

E-Print Network (OSTI)

Precise characterization of a hyperfine interaction is a prerequisite for high fidelity manipulations of electron and nuclear spins belonging to a hybrid qubit register in diamond. Here, we demonstrate a novel scheme for determining a hyperfine interaction, using single-quantum and zero-quantum Ramsey fringes, by applying it to the system of a Nitrogen Vacancy (NV) center and a $^{13}$C nuclear spin in the 1$^{\\mathrm{st}}$ shell. The zero-quantum Ramsey fringe, analogous to the quantum beat in a $\\Lambda$-type level structure, particularly enhances the measurement precision for non-secular hyperfine terms. Precisions less than 0.5 MHz in the estimation of all the components in the hyperfine tensor were achieved. Furthermore, for the first time we experimentally determined the principal axes of the hyperfine interaction in the system. Beyond the 1$^{\\mathrm{st}}$ shell, this method can be universally applied to other $^{13}$C nuclear spins interacting with the NV center.

J. H. Shim; B. Nowak; I. Niemeyer; J. Zhang; F. D. Brandao; D. Suter

2013-07-01T23:59:59.000Z

243

Nano-hillock formation in diamond-like carbon induced by swift heavy projectiles in the electronic stopping regime: Experiments and atomistic simulations  

Science Conference Proceedings (OSTI)

The formation of surface hillocks in diamond-like carbon is studied experimentally and by means of large-scale molecular dynamics simulations with 5 Multiplication-Sign 10{sup 6} atoms combined with a thermal spike model. The irradiation experiments with swift heavy ions cover a large electronic stopping range between {approx}12 and 72 keV/nm. Both experiments and simulations show that beyond a stopping power threshold, the hillock height increases linearly with the electronic stopping, and agree extremely well assuming an efficiency of approximately 20% in the transfer of electronic energy to the lattice. The simulations also show a transition of sp{sup 3} to sp{sup 2} bonding along the tracks with the hillocks containing almost no sp{sup 3} contribution.

Schwen, D. [Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Illinois 61801 (United States); Bringa, E. [CONICET and Instituto de Ciencias Basicas, Universidad Nacional de Cuyo, Mendoza 5500 (Argentina); Krauser, J. [Hochschule Harz, Friedrichstrasse 57-59, 38855 Werningerode (Germany); Weidinger, A. [Helmholtz-Zentrum Berlin fuer Materialien und Energie, 14109 Berlin (Germany); Trautmann, C. [GSI Helmholtzzentrum, Planckstr. 1, 64291, Darmstadt (Germany); Hofsaess, H. [II. Physikalisches Institut, Universitaet Goettingen, Friedrich-Hund-Platz 1, 37077 Goettingen (Germany)

2012-09-10T23:59:59.000Z

244

Electron spin resonance shift and linewidth broadening of nitrogen-vacancy centers in diamond as a function of electron irradiation dose  

SciTech Connect

A high-nitrogen-concentration diamond sample was subjected to 200-keV electron irradiation using a transmission electron microscope. The optical and spin-resonance properties of the nitrogen-vacancy (NV) color centers were investigated as a function of the irradiation dose up to 6.4 Multiplication-Sign 10{sup 21} e{sup -}/cm{sup 2}. The microwave transition frequency of the NV{sup -} center was found to shift by up to 0.6% (17.1 MHz) and the linewidth broadened with increasing electron-irradiation dose. Unexpectedly, the measured magnetic sensitivity is best at the lowest irradiation dose, even though the NV concentration increases monotonically with increasing dose. This is in large part due to a sharp reduction in optically detected spin contrast at higher doses.

Kim, Edwin [Ramtron International Corporation, 1850 Ramtron Drive, Colorado Springs, Colorado 80921 (United States); Acosta, Victor M. [Hewlett-Packard Laboratories, 1501 Page Mill Road, Palo Alto, California 94304 (United States); Department of Physics, University of California, Berkeley, California 94720-7300 (United States); Bauch, Erik [Department of Physics, University of California, Berkeley, California 94720-7300 (United States); Technische Universitaet Berlin, Hardenbergstrasse 28, 10623 Berlin (Germany); Budker, Dmitry [Department of Physics, University of California, Berkeley, California 94720-7300 (United States); Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States); Hemmer, Philip R. [Department of Electrical and Computer Engineering, Texas A and M University, College Station, Texas 77843-3128 (United States)

2012-08-20T23:59:59.000Z

245

Spectroscopic determination of C{sub 2} in Ar/H{sub 2}/CH{sub 4} and Ar/H{sub 2}/C{sub 60} microwave plasmas for nanocrystalline diamond synthesis.  

DOE Green Energy (OSTI)

We have measured the steady state concentration of gas phase C{sub 2} in Ar/H{sub 2}/CH{sub 4} and Ar/H{sub 2}/C{sub 60} microwave plasmas used for the deposition of nanocrystalline diamond films. High sensitivity white light absorption spectroscopy is used to monitor the C{sub 2} density using the d{sup 3}II {l_arrow} A{sup 3}II (0,0) vibrational band of C{sub 2} as chamber pressure, microwave power, substrate temperature and feed gas mixtures are varied in both chemistries. Understanding how these parameters influence the C{sub 2} density in the plasma volume provides insight into discharge mechanisms relevant to the deposition of nanocrystalline diamond.

Goyette, A. N.; Lawler, J. E.; Anderson, L. W.; Gruen, D. M.; McCauley, T. G.; Zhou, D.; Krauss, A. R.

1998-02-05T23:59:59.000Z

246

Behavior of the Diamond Difference and Low-Order Nodal Numerical Transport Methods in the Thick Diffusion Limit for Slab Geometry  

Science Conference Proceedings (OSTI)

The objective of this work is to investigate the thick diffusion limit of various spatial discretizations of the one-dimensional, steady-state, monoenergetic, discrete ordinates neutron transport equation. This work specifically addresses the two lowest order nodal methods, AHOT-N0 and AHOT-N1, as well as reconsiders the asymptotic limit of the Diamond Difference method. The asymptotic analyses of the AHOT-N0 and AHOT-N1 nodal methods show that AHOT-N0 does not possess the thick diffusion limit for cell edge or cell average fluxes except under very limiting conditions, which is to be expected considering the AHOT-N0 method limits to the Step method in the thick diffusion limit. The AHOT-N1 method, which uses a linear in-cell representation of the flux, was shown to possess the thick diffusion limit for both cell average and cell edge fluxes. The thick diffusion limit of the DD method, including the boundary conditions, was derived entirely in terms of cell average scalar fluxes. It was shown that, for vacuum boundaries, only when {sigma}{sub t}, h, and Q are constant and {sigma}{sub a} = 0 is the asymptotic limit of the DD method close to the finite-differenced diffusion equation in the system interior, and that the boundary conditions between the systems will only agree in the absence of an external source. For a homogeneous medium an effective diffusion coefficient was shown to be present, which was responsible for causing numeric diffusion in certain cases. A technique was presented to correct the numeric diffusion in the interior by altering certain problem parameters. Numerical errors introduced by the boundary conditions and material interfaces were also explored for a two-region problem using the Diamond Difference method. A discrete diffusion solution which exactly solves the one-dimensional diffusion equation in a homogeneous region with constant cross sections and a uniform external source was also developed and shown to be equal to the finite-differenced diffusion discretization for c = 1 in the system interior, where again the boundary conditions again only agree in the absence of an external source. It was also shown that for c < 1 the exact discrete diffusion solution is written in terms of hyperbolic functions, with expressions which limit to the exact solution for the c = 1 case as c {yields} 1. Finally, a transport discretization is developed which reproduces the exact S2 solution for the case of a purely scattering homogeneous region with vacuum boundary conditions, and an extension to the discretization for the case of c < 1 is found by considering a Taylor series expansion of the exact answer centered at c = 0.

Gill DF

2007-04-17T23:59:59.000Z

247

Activity of tungsten and rhenium filaments in CH sub 4 /H sub 2 and C sub 2 H sub 2 /H sub 2 mixtures: Importance for diamond CVD  

DOE Green Energy (OSTI)

The resistance R, spectral emissivity {epsilon}, and power consumption of W and Re filaments heated to 2500 {degree}C in mixtures of CH{sub 4} or C{sub 2}H{sub 2} in H{sub 2} have been measured in a series of experiments focusing on the state of the filament activity, i.e., its ability to dissociate the reactant gases. It has been found that these properties of the filaments, as well as the partial pressures of CH{sub 4} and C{sub 2}H{sub 2} in the reaction chamber, depend critically on both the filament temperature and the reactant ratio, e.g., C{sub 2}H{sub 2}/H{sub 2}. Specifically, both W and Re filaments show sharp jumps in power consumption at essentially the same temperature, signaling strong increases in filament activity and, hence, production of atomic hydrogen. These results are proposed to be due to the removal of non-reactive carbon from the surface of the filament via etching by atomic hydrogen and are consistent with the predictions of our thermodynamic model for the C-H system. Evidence for gas phase reactions is presented and the role of thermal diffusion is discussed. The emissivities of the W and Re filaments are observed to have significantly different temperature dependences which are attributed to differences in the phase diagrams for the W-C and Re-C systems. The implications of these results for hot-filament diamond CVD are discussed.

Sommer, M.; Smith, F.W. (Department of Physics, The City College of the City University of New York, New York, NY (USA))

1990-11-01T23:59:59.000Z

248

Synchrotron x-ray spectroscopy of Eu/HNO{sub 3} aqueous solutions at high temperatures and pressures and Nb-bearing silicate melt phases coexisting with hydrothermal fluids using a modified hydrothermal diamond anvil cell and rail assembly  

Science Conference Proceedings (OSTI)

A modified hydrothermal diamond anvil cell (HDAC) rail assembly has been constructed for making synchrotron x-ray absorption spectroscopy, x-ray fluorescence, and x-ray mapping measurements on fluids or solid phases in contact with hydrothermal fluids up to {approx}900 deg. C and 700 MPa. The diamond anvils of the HDAC are modified by laser milling grooves or holes, for the reduction of attenuation of incident and fluorescent x rays and sample cavities. The modified HDAC rail assembly has flexibility in design for measurement of light elements at low concentrations or heavy elements at trace levels in the sample and the capability to probe minute individual phases of a multiphase fluid-based system using focused x-ray microbeam. The supporting rail allows for uniform translation of the HDAC, rotation and tilt stages, and a focusing mirror, which is used to illuminate the sample for visual observation using a microscope, relative to the direction of the incident x-ray beam. A structure study of Eu(III) aqua ion behavior in high-temperature aqueous solutions and a study of Nb partitioning and coordination in a silicate melt in contact with a hydrothermal fluid are described as applications utilizing the modified HDAC rail assembly.

Mayanovic, Robert A.; Anderson, Alan J.; Bassett, William A.; Chou, I-Ming [Department of Physics, Astronomy and Materials Science, Missouri State University, Springfield, Missouri 65897 (United States); Department of Earth Sciences, St. Francis Xavier University, P.O. Box 5000, Antigonish, Nova Scotia B2G 2W5 (Canada); Department of Earth and Atmospheric Sciences, Cornell University, Ithaca, New York 14853 (United States); MS 954, U.S. Geological Survey, Reston, Virginia 20192 (United States)

2007-05-15T23:59:59.000Z

249

Energy efficiency improvement and cost saving opportunities for petroleum refineries  

E-Print Network (OSTI)

Ultramar Inc. Sunoco Inc. ExxonMobil Willaims Shell BPBrian Eidt and staff at ExxonMobil, F.L. Oaks (MarathonVicksburg Newell (Congo) ExxonMobil Baton Rouge Baytown

Worrell, Ernst; Galitsky, Christina

2005-01-01T23:59:59.000Z

250

ULTRANANOCRYSTALLINE DIAMOND (UNCD MECHANICAL SEALS  

industrial research program, comprised of leading-edge materials research, ... waste, refrigeration, automotive, and appliance industries. They are ...

251

CURRICULUM VITAE Howard J. Diamond  

E-Print Network (OSTI)

of interest, and large part of my work, is dedicated to the regional Pacific Islands GCOS program. In that, I Change Research Program's Data Information Working #12;Group, and the Committee on Earth Observing Change Science Program's Observations Working Group. My goal as the U.S. GCOS Program Manager is to aid

252

Diamond-free Degree Sequences  

E-Print Network (OSTI)

Miller,A. Prosser,P. DCS Technical Report Series pp 1 to 9 Dept of Computing Science, University of Glasgow

Miller, A.

253

Recreating the Strength of Diamonds  

E-Print Network (OSTI)

momentum, inductance L "Low torque" state LL "Lower than low" torque state lb. Pounds LED Light emitting diode m Meters m Azimuthal wavenumber, spherical harmonic order xv #12;MHz Megahertz MOSFET Metal oxide

254

Quantum cascade laser investigations of CH{sub 4} and C{sub 2}H{sub 2} interconversion in hydrocarbon/H{sub 2} gas mixtures during microwave plasma enhanced chemical vapor deposition of diamond  

Science Conference Proceedings (OSTI)

CH{sub 4} and C{sub 2}H{sub 2} molecules (and their interconversion) in hydrocarbon/rare gas/H{sub 2} gas mixtures in a microwave reactor used for plasma enhanced diamond chemical vapor deposition (CVD) have been investigated by line-of-sight infrared absorption spectroscopy in the wavenumber range of 1276.5-1273.1 cm{sup -1} using a quantum cascade laser spectrometer. Parameters explored include process conditions [pressure, input power, source hydrocarbon, rare gas (Ar or Ne), input gas mixing ratio], height (z) above the substrate, and time (t) after addition of hydrocarbon to a pre-existing Ar/H{sub 2} plasma. The line integrated absorptions so obtained have been converted to species number densities by reference to the companion two-dimensional (r,z) modeling of the CVD reactor described in Mankelevich et al. [J. Appl. Phys. 104, 113304 (2008)]. The gas temperature distribution within the reactor ensures that the measured absorptions are dominated by CH{sub 4} and C{sub 2}H{sub 2} molecules in the cool periphery of the reactor. Nonetheless, the measurements prove to be of enormous value in testing, tensioning, and confirming the model predictions. Under standard process conditions, the study confirms that all hydrocarbon source gases investigated (methane, acetylene, ethane, propyne, propane, and butane) are converted into a mixture dominated by CH{sub 4} and C{sub 2}H{sub 2}. The interconversion between these two species is highly dependent on the local gas temperature and the H atom number density, and thus on position within the reactor. CH{sub 4}->C{sub 2}H{sub 2} conversion occurs most efficiently in an annular shell around the central plasma (characterized by 1400CH{sub 4} is favored in the more distant regions where T{sub gas}C{sub 2}H{sub 2} conversion, whereas the reverse C{sub 2}H{sub 2}->CH{sub 4} process only requires H atoms to drive the reactions; H atoms are not consumed by the overall conversion.

Ma Jie; Cheesman, Andrew; Ashfold, Michael N. R. [School of Chemistry, University of Bristol, Bristol BS8 1TS (United Kingdom); Hay, Kenneth G.; Wright, Stephen; Langford, Nigel; Duxbury, Geoffrey [Department of Physics, University of Strathclyde, John Anderson Building, 107 Rottenrow, Glasgow G4 0NG (United Kingdom); Mankelevich, Yuri A. [Skobel'tsyn Institute of Nuclear Physics, Moscow State University, Leninskie Gory, Moscow 119991 (Russian Federation)

2009-08-01T23:59:59.000Z

255

wvblack DiamonDs Engineering and  

E-Print Network (OSTI)

power-company serendipity; when you realize the present nighttime drag for cellphone chargers, large

Mohaghegh, Shahab

256

Quality Assessment of Diamond Composite Materials  

Science Conference Proceedings (OSTI)

Injection Molding of Tungsten Powder Treated by Jet Mill ... Mechanical Properties and Welding Conditions of Monopile and Transition for Offshore Wind Plant.

257

Standards Panel: 1. Stephen Diamond, General Manager ...  

Science Conference Proceedings (OSTI)

... He has also served as the Law Enforcement/Counterintelligence Coordinator to the LE/CI Center within the Department of Defense's Joint Task ...

2010-11-04T23:59:59.000Z

258

wvblack DiamonDs Engineering and  

E-Print Network (OSTI)

of contents Spindler Presents Poundstone Lecture ..........................................1 WV Coal Hall of Fame..............2 Outstanding Academic Achievement...............................3 NWV Coal Prep the United States, Canada, and Australia. Notably, he was president and CEO of the Pittston Coal Group

Mohaghegh, Shahab

259

wvBLACK DIAMONDS table of contents  

E-Print Network (OSTI)

County Coal Corporation, presented the annual William Poundstone Lecture entitled, "My Last (and Best) 23 Years in Coal." Bradbury's 42-year coal mining career included a number of senior-level positions in engineering and management. He was president of Martin County Coal during his last 18 years in the industry

Mohaghegh, Shahab

260

wvBLACK DIAMONDS table of contents  

E-Print Network (OSTI)

......................12 Chris Hamilton, senior vice president of the West Virginia Coal Association (WVCA), presented a speech on "Coal, Energy, and Mountaintop Development," as part West Virginia University's College experience in the coal mining industry, 25 with the WVCA. He is responsible for legislative, regulatory

Mohaghegh, Shahab

Note: This page contains sample records for the topic "ultramar diamond shamrock" 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

wvBLACK DIAMONDS Engineering and  

E-Print Network (OSTI)

. Robert E. Murray is president of Murray Energy Corp., the largest privately owned coal mining company father's paralysis from a mining accident. He worked for the North American Coal Corp. for 31 years president ­ mining services for International Coal Group (ICG), presented the William Poundstone Lecture

Mohaghegh, Shahab

262

Diamond Composites. The New Generation of Heatsink  

Science Conference Proceedings (OSTI)

Aluminum-fly Ash Composites Produced by Powder Metallurgy Processing Characterisation of Al-AC8H/Al2O3p Metal Matrix Composites Produced by Stir...

263

Available Technologies: Diamond Watermarking with Nitrogen ...  

See More Ion Sources and Beams Technologies. Contact Us. Receive Customized Tech Alerts. Tech Transfer Site Map. Last updated: 07/12/2013.

264

Shocking Results from Diamond Anvil Cell Experiments  

Shocked behavior in microscopic samples can consist of the behavior of shocked explosives before chemistry begins or the high density, ...

265

Bruce Diamond | National Nuclear Security Administration  

National Nuclear Security Administration (NNSA)

Nuclear Security Administration Our Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure...

266

Sun{diamond}Lab test facilities  

DOE Green Energy (OSTI)

This country's efforts to successfully develop and commercialize concentrating solar power (CSP) technologies depend on specialized research and testing capabilities. To Support this effort, the US Department of Energy's Concentrating Solar Power Program maintains two major test facilities: the National Solar Thermal Test Facility at Sandia National Laboratories in Albuquerque, New Mexico, and the High Flux Solar Furnace at the National Renewable Energy Laboratory in Golden, Colorado. These test facilities combine to be instrumental in the development of parabolic dishes, troughs, and solar power towers.

NONE

1998-04-01T23:59:59.000Z

267

Sun{diamond}Lab test facilities  

DOE Green Energy (OSTI)

This country`s efforts to successfully develop and commercialize concentrating solar power (CSP) technologies depend on specialized research and testing capabilities. To Support this effort, the US Department of Energy`s Concentrating Solar Power Program maintains two major test facilities: the National Solar Thermal Test Facility at Sandia National Laboratories in Albuquerque, New Mexico, and the High Flux Solar Furnace at the National Renewable Energy Laboratory in Golden, Colorado. These test facilities combine to be instrumental in the development of parabolic dishes, troughs, and solar power towers.

Not Available

1998-04-01T23:59:59.000Z

268

Are diamonds a MEM's best friend?  

SciTech Connect

Next-generation military and civilian communication systems will require technologies capable of handling data/ audio, and video simultaneously while supporting multiple RF systems operating in several different frequency bands from the MHz to the GHz range. RF microelectromechani-cal/nanoelectromechanical (MEMS/NEMS) devices, such as resonators and switches, are attractive to industry as they offer a means by which performance can be greatly improved for wireless applications while at the same time potentially reducing overall size and weight as well as manufacturing costs.

Auciello, O.; Pacheco, S.; Sumant, A. V.; Gudeman, C.; Sampath, S.; Datta, A.; Carpick, R. W.; Adiga, V. P.; Zurcher, P.; Ma, Z.; Yuan, H.-C.; Carlisle, J. A.; Kabius, B.; Hiller, J.; Srinivasan, S.; Freescale Semiconductor; Innovative MicroTech.; Univ. of Pennsylvania; Univ. of Wisconsin at Madison; Advanced Diamond Tech., Inc.; INTEL Res. Lab.

2007-12-01T23:59:59.000Z

269

Argonne in the marketplace: Ultrananocrystalline diamond | Argonne...  

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

AVAILABLE FOR LICENSING Many more Argonne innovations are available for licensing. Here's just a few: Cleaner diesel emissions The diesel DeNOx catalyst removes 80-85% of nitrogen...

270

Diamond, Illinois: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

2886428°, -88.2517287° 2886428°, -88.2517287° 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":41.2886428,"lon":-88.2517287,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

271

Industrial energy conservation technology: proceedings of the 1984 conference and exhibition. Volume 1  

SciTech Connect

The Sixth Annual Industrial Energy Conservation Technology Conference and Exhibition was held at the Shamrock Hilton Hotel, Houston, Texas, April 15-18, 1984. Fifty-nine papers from Vol. I of the proceedings have been entered individually into EDB and ERA; one has been entered previously from other sources. (LTN)

Williams, M.A. (ed.)

1984-01-01T23:59:59.000Z

272

Microsoft Word - Diamond_715_ACEEE_2012_LBNL.docx  

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

How How w ell d o h ome e nergy a udits s erve the h omeowner? Aaron I ngle 1 , M ithra M oezzi 1, Loren Lutzenhiser 1 , a nd R ichard D iamond 2 1 Portland S tate U niversity Portland, O R 9 7207 2 Lawrence B erkeley N ational L aboratory 1 C yclotron R oad Berkeley, C A 9 4720 May 2 012 This p aper w as a lso p ublished i n t he Proceedings o f the 2 012 S ummer S tudy o n E nergy E fficiency i n Buildings o f t he A merican C ouncil f or a n E nergy Efficient E conomy LBNL-5712E 1 Disclaimer This document was prepared as an account of work sponsored by the United States Government. While this document is believed to contain correct information, neither the United States Government nor any agency thereof, nor The Regents of the University of California, nor any of their employees, makes any warranty, express or implied, or assumes any legal

273

Argonne CNM Highlight: Research Advances using Ultrananocrystalline Diamond  

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

User science highlight: Graphene sheet observed with optical method User science highlight: Graphene sheet observed with optical method Sample confocal microscope images of reflection from the single layer of graphene oxide at different laser wavelengths. A simple approach is needed to identify nanometer-scale layered materials such as graphene, clays, metal dichalcogenides, and self-assembled monolayers. A collaborative CNM user project has developed a simple optical identification method employing standard confocal microscopy. High contrast is obtained by depositing the materials on a substrate consisting of a thin dielectric layer on silicon. By varying the wavelength of light used in the microscope, effective refractive indices and absorption coefficients can be determined. An example has been carried out for graphene, graphene oxide, and reduced graphene oxide. Single-atomic

274

Diamond Bar, California: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

Bar, California: Energy Resources Bar, California: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 34.0286226°, -117.8103367° 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":34.0286226,"lon":-117.8103367,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

275

Diamond Beach, New Jersey: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

8.9595572°, -74.8523914° 8.9595572°, -74.8523914° Loading map... {"minzoom":false,"mappingservice":"googlemaps3","type":"ROADMAP","zoom":14,"types":["ROADMAP","SATELLITE","HYBRID","TERRAIN"],"geoservice":"google","maxzoom":false,"width":"600px","height":"350px","centre":false,"title":"","label":"","icon":"","visitedicon":"","lines":[],"polygons":[],"circles":[],"rectangles":[],"copycoords":false,"static":false,"wmsoverlay":"","layers":[],"controls":["pan","zoom","type","scale","streetview"],"zoomstyle":"DEFAULT","typestyle":"DEFAULT","autoinfowindows":false,"kml":[],"gkml":[],"fusiontables":[],"resizable":false,"tilt":0,"kmlrezoom":false,"poi":true,"imageoverlays":[],"markercluster":false,"searchmarkers":"","locations":[{"text":"","title":"","link":null,"lat":38.9595572,"lon":-74.8523914,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

276

Blue Diamond, Nevada: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

463595°, -115.4038924° 463595°, -115.4038924° 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":36.0463595,"lon":-115.4038924,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

277

Study on the Hydrogenated Diamond-Like Carbon Films ...  

Science Conference Proceedings (OSTI)

M. Abbasi Firuzjah 4 B. Shokri. Laser and Plasma Research Institute,. Shahid Beheshti University, Evin,. 1983963113 Tehran, Iran e-mail: latifi@cc.sbu.ac.ir. 123.

278

Dented Diamonds, Carbon Cages and Exceptional Potential | U.S...  

Office of Science (SC) Website

for Teachers and Scientists Small Business Innovation Research and Small Business Technology Transfer Project Assessment Laboratories Ames Laboratory Argonne National...

279

Would Diamond Nanorods Be Stronger than Fullerene Nanotubes?  

E-Print Network (OSTI)

, silicon nitride, silicon carbide, or aluminum oxide), which has made nanotubes attractive structures yield strengths for the strongest fibers typically used in fiber-reinforced composites (e.g., graphite

280

Robust Diamond-Based RF Switch Yields Enhanced Communication ...  

Meeting the needs of next-generation military and civilian communication systems ... On the other hand, switches using microelectromechanical system technology

Note: This page contains sample records for the topic "ultramar diamond shamrock" 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

PROOF COPY 089505JAP Microstructure of nanocrystalline diamond powders studied  

E-Print Network (OSTI)

parameter method was applied to characterize the structure of a shell-core model of nanosize particles models of the surface com- ponent have been suggested.7 Recently Palosz and coworkers have developed phases--the core and the shell components.9­11 In this model, the apparent lattice pa- rameter model alp

Gubicza, Jenõ

282

Protected Polycrystalline Diamond Compact Bits For Hard Rock Drilling  

Science Conference Proceedings (OSTI)

Two bits were designed. One bit was fabricated and tested at Terra-Tek's Drilling Research Laboratory. Fabrication of the second bit was not completed due to complications in fabrication and meeting scheduled test dates at the test facility. A conical bit was tested in a Carthage Marble (compressive strength 14,500 psi) and Sierra White Granite (compressive strength 28,200 psi). During the testing, Hydraulic Horsepower, Bit Weight, Rotation Rate, were varied for the Conical Bit, a Varel Tricone Bit and Varel PDC bit. The Conical Bi did cut rock at a reasonable rate in both rocks. Beneficial effects from the near and through cutter water nozzles were not evident in the marble due to test conditions and were not conclusive in the granite due to test conditions. At atmospheric drilling, the Conical Bit's penetration rate was as good as the standard PDC bit and better than the Tricone Bit. Torque requirements for the Conical Bit were higher than that required for the Standard Bits. Spudding the conical bit into the rock required some care to avoid overloading the nose cutters. The nose design should be evaluated to improve the bit's spudding characteristics.

Robert Lee Cardenas

2000-10-31T23:59:59.000Z

283

Aztec Diamonds and Digraphs, and Hankel Determinants of Schroder Numbers  

E-Print Network (OSTI)

.L. Shader, Matrices of Sign-Solvable Linear Systems, Cambridge Tracts in Mathematics # 116, Cambridge, 1965

Sheridan, Jennifer

284

From Materials Education to Growth of Jewelry Diamonds  

Science Conference Proceedings (OSTI)

Solidification Advances The Solidification of Methane Hydrate **Synthesis and Processing of Abrasives as Industrial Ceramics: Prof. M. C. Flemings' Role in...

285

In Focus: Dented Diamonds, Carbon Cages, and Exceptional Potential...  

Office of Science (SC) Website

by the Energy Frontier Research in Extreme Environments (EFree) center, an EFRC led by Ho-kwang Mao at the Carnegie Institution of Washington. Last modified: 3272013...

286

SLAC National Accelerator Laboratory - Tools of the Trade: Diamonds...  

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

It's been used since the 1960s to focus X-rays. But the X-ray pulses at the LCLS, which are a billion times brighter than at any previous light source, damage today's...

287

Electronic diamond: Fabrication processes and electron emission performance  

SciTech Connect

This is the final report of a one-year, Laboratory-Directed Research and Development (LDRD) project at the Los Alamos National Laboratory (LANL). The project sought to develop a working Laboratory prototype model that would demonstrate the viability of a mercury-free light bulb concept in a controlled laboratory setting. A successful demonstration of the light bulb is reported.

Scott, M.; Springer, R.

1996-09-01T23:59:59.000Z

288

Discovering New Talents for Diamond | Advanced Photon Source  

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

at normal incidence to the reflecting atomic planes for hard x-rays with a photon energy of E 24 keV. The reflectivity is significantly higher than that of Si crystals under...

289

Synthesis and characterization of a nanocrystalline diamond aerogel  

E-Print Network (OSTI)

aerogel material consists of nanocrystalline grains connected through what appears to be thin surface coatings

Pauzauskie, Peter J.

2012-01-01T23:59:59.000Z

290

Performance of Diamond Gyrotron Windows at DIII-D  

E-Print Network (OSTI)

Bull. Am. Phys. Soc. 50, 268 (2005)47th American Physical Society Annual Meeting of Division of Plasma Physics Denver Colorado, US, 2005999612095

Gorelov, I.A.

2005-08-17T23:59:59.000Z

291

Diamond Ridge, Alaska: Energy Resources | Open Energy Information  

Open Energy Info (EERE)

Ridge, Alaska: Energy Resources Ridge, Alaska: Energy Resources Jump to: navigation, search Equivalent URI DBpedia Coordinates 59.6761111°, -151.5575° 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":59.6761111,"lon":-151.5575,"alt":0,"address":"","icon":"","group":"","inlineLabel":"","visitedicon":""}]}

292

Diamond and Related Materials 7 (1998) 14911502 Growth of diamond films using an enclosed methyl-acetylene and  

E-Print Network (OSTI)

(Sorensen, Model DCS bottom of the burner. No thermocouple was placed in 33-33). The substrate and heater-red optical pyrometer (Williamson, Model 8200), water and a microprocessor thermometer (Model HH23 in a flat copper, and water cooled via a 0.25-inch copper tubing soft-soldered to the burner body

Dandy, David

293

Industrial energy conservation technology: proceedings of the 1984 conference and exhibition. Volume II  

Science Conference Proceedings (OSTI)

The Sixth Industrial Energy Conservation Technology Conference and Exhibition was held at the Shamrock Hilton Hotel, Houston, Texas, April 15-18, 1984. This was a project of the Texas State Energy Conservation Program sponsored by the Texas Economic Development Commission and the Public Utility Commission of Texas. Sixty-seven papers from Volume 2 of the proceedings have been entered individually into EDB and ERA. (LTN)

Williams, M.A. (ed.)

1984-01-01T23:59:59.000Z

294

Proceedings of the Seventh Applied Diamond Conference/Third Frontier Carbon  

E-Print Network (OSTI)

an auxiliary heater supplies the consumers with warm water even in the case of failures. In order to assure sensors into a solar system with buffer storage tank and direct discharging. Figure 1 shows the sensors/Output-Diagram (q. v. Fig. 3). Solar domestic hot water systems show a well-known linear relationship, but also

Tzeng, Yonhua

295

Passivated diamond film temperature sensing probe and measuring system employing same  

DOE Patents (OSTI)

A high temperature sensing probe includes an optical fiber or rod having a distal end and a proximal end. The optical fiber or rod has a coating secured to the distal end thereof, wherein the coating is capable of producing a Raman spectrum when exposed to an exciting radiation source.

Young, Jack P. (Oak Ridge, TN); Mamantov, Gleb (Knoxville, TN)

1998-01-01T23:59:59.000Z

296

Hard as Diamond: A New Form of Carbon Created under Ultrahigh...  

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

from Nature to Build Better Nanomaterials How a Powerful Antibody Neutralizes HIV How Algae Use a "Sulfate Trap" to Selectively Biomineralize Strontium Emulating-and...

297

REL ATRIO DE DESENVOLVIMENTO HUMANO 2007/2008 201 1 Diamond 2005.  

E-Print Network (OSTI)

to the Draft Climate Change Bill's Carbon Reduction Targets." Tyndall Briefing Note 17. March 2007. Tyndall and Secure Energy. COM. 2006. 105 Final. Brussels. ------. 2006c. "An EU Strategy for Biofuels

298

Electromagnetically-driven ultra-fast tool servos for diamond turning  

E-Print Network (OSTI)

This thesis presents the design, implementation, and control of a new class of fast tool servos (FTS). The primary thesis contributions include the design and experimental demonstration of: novel ultra-fast electromagnetic ...

Lu, Xiaodong, Ph. D. Massachusetts Institute of Technology

2005-01-01T23:59:59.000Z

299

DOI: 10.1002/adfm.200600265 Guest-Induced Chirality in the Ferrimagnetic Nanoporous Diamond  

E-Print Network (OSTI)

, 67000 Strasbourg Cedex 01 (France) Prof. K. Inoue Department of Chemistry, Faculty of Science Hiroshima University 1­3­1 Kagamiyama, Higashi Hiroshima Hiroshima 739­8526 (Japan) [**] This work is supported

Gao, Song

300

Structural, vibrational and thermodynamic properties of carbon allotropes from first-principles : diamond, graphite, and nanotubes  

E-Print Network (OSTI)

The structural, dynamical, and thermodynamic properties of different carbon allotropes are computed using a combination of ab-initio methods: density-functional theory for total-energy calculations and density-functional ...

Mounet, Nicolas (Nicolas Frank)

2005-01-01T23:59:59.000Z

Note: This page contains sample records for the topic "ultramar diamond shamrock" 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

Area selection for diamonds using magnetotellurics: Examples from southern Africa Alan G. Jones a,  

E-Print Network (OSTI)

of the Witwatersrand, Jan Smuts Avenue, Johannesburg 2050, South Africa k ABB AB, HVDC, Ludvika, SE-77180, Sweden a b

Jones, Alan G.

302

Diamonds in the rough: identification of individual napthenic acids in oil sands process water  

Science Conference Proceedings (OSTI)

Expansion of the oil sands industry of Canada has seen a concomitant increase in the amount of process water produced and stored in large lagoons known as tailings ponds. Concerns have been raised, particularly about the toxic complex mixtures of water-soluble naphthenic acids (NA) in the process water. To date, no individual NA have been identified, despite numerous attempts, and while the toxicity of broad classes of acids is of interest, toxicity is often structure-specific, so identification of individual acids may also be very important. The chromatographic resolution and mass spectral identification of some individual NA from oil sands process water is described. The authors concluded that the presence of tricyclic diamondoid acids, never before even considered as NA, suggests an unprecedented degree of biodegradation of some of the oil in the oil sands. The identifications reported should now be followed by quantitative studies, and these used to direct toxicity assays of relevant NA and the method used to identify further NA to establish which, or whether all NA, are toxic. The two-dimensional comprehensive gas chromatography-mass spectrometry method described may also be important for helping to better focus reclamation/remediation strategies for NA as well as in facilitating the identification of the sources of NA in contaminated surface waters (auth)

Rowland, Steven J.; Scarlett, Alan G.; Jones, David; West, Charles E. (Petroleum and Environmental Geochemistry Group, Biogeochemistry Research Centre, University of Plymouth (United Kingdom)); Frank, Richard A. (Aquatic Ecosystems Protection Research Division-Water Science and Technology Directorate, Environment Canada, Burlington, Ontario (Canada)

2011-03-10T23:59:59.000Z

303

S&TR | March/April 2008: Molecular Building Blocks Made of Diamonds  

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

together and clog pipelines. These particles, called diamondoids, can be found in crude oil at concentrations up to thousands of parts per million. Similar diamondlike carbon...

304

Synthesis and characterization of single-wall carbon nanotubeamorphous diamond thin-film composites  

E-Print Network (OSTI)

bundles. In situ resistance measurements of the mats during PLD, as well as ex situ Raman spectroscopy surface void fraction to account for surface roughness.19 First, the pure ta-C film is of high quality, current­voltage measurements, spectroscopic ellipsometry, and field-emission scanning electron microscopy

Geohegan, David B.

305

Diamond Amplified Photocathode at BNL | U.S. DOE Office of Science...  

Office of Science (SC) Website

Laboratory, New York Developed in: 2004-2007 Result of NP research: Electron cooling R&D for RHIC Application currently being supported by: DOD - ONR Impactbenefit to...

306

Simulations of CVD Diamond Film Growth Using a Simplified Monte Carlo Model Paul W. May1  

E-Print Network (OSTI)

, low energy, efficient process that stops the build up of polymer chains on the growing surface, medical coatings and optics [1]. The CVD process involves the gas phase decomposition of a gas mixture

Bristol, University of

307

Plasma biasing to control the growth conditions of diamond-like carbon  

E-Print Network (OSTI)

M. M. Bilek and A. Anders, Plasma Sources Sci. Technol. 8 (important for carbon films. The plasma bias principle isnot limited to carbon plasmas may also be applied to other

Anders, Andre; Pasaja, Nitisak; Lim, Sunnie H.N.; Petersen, Tim C.; Keast, Vicki J.

2006-01-01T23:59:59.000Z

308

The specific surface area and chemical composition of diamond dust near Barrow, Alaska  

E-Print Network (OSTI)

and the membrane systems selected, additional equipment such as knockout drums, coalescing filters, and guard beds far and modeling predictions is quite reasonable. Methane 20% H2S/ 80%N2 Air MFC MFC MFC Proceedings of the 2002 U.S. DOE Hydrogen Program Review NREL/CP-610-32405 #12;MFC-3 MFC-1 MFC-2 N2 H2S O2

Douglas, Thomas A.

309

Performance Study of ScepterTM Metal Bond Diamond Grinding Wheel  

SciTech Connect

Advanced ceramics are attractive for many applications in the transportation, energy, military, and industrial markets because they possess properties of high-temperature durability, corrosion resistance, strength, hardness, stiffness, and wear resistance. Unfortunately, these same properties make advanced ceramics more difficult to machine than traditional materials. The reliability and manufacturing costs of advanced ceramic components are significant concerns that must be overcome. Nevertheless, the use of advanced ceramic materials is expected to increase dramatically in new transportation systems in response to more stringent energy conservation and pollution reduction requirements. This study discusses the goals, commercialization plans, phased development, scale-up, testing, and external verification of performance of the innovative grinding wheel that evolved from the project.

Denison, S.K.; Licht, R.W.; McSpadden, S.B., Jr.; Parten, R.J.; Picone, J.W.; Shelton, J.E.

1999-06-17T23:59:59.000Z

310

Performance Study of ScepterTM Metal Bond Diamond Grinding Wheel  

Science Conference Proceedings (OSTI)

Advanced ceramics are attractive for many applications in the transportation, energy, military, and industrial markets because they possess properties of high-temperature durability, corrosion resistance, strength, hardness, stiffness, and wear resistance. Unfortunately, these same properties make advanced ceramics more difficult to machine than traditional materials. The reliability and manufacturing costs of advanced ceramic components are significant concerns that must be overcome. Nevertheless, the use of advanced ceramic materials is expected to increase dramatically in new transportation systems in response to more stringent energy conservation and pollution reduction requirements. This study discusses the goals, commercialization plans, phased development, scale-up, testing, and external verification of performance of the innovative grinding wheel that evolved from the project.

Denison, S.K.; Licht, R.W.; McSpadden, S.B., Jr.; Parten, R.J.; Picone, J.W.; Shelton, J.E.

1999-06-17T23:59:59.000Z

311

Synthesis of Diamond-like Carbon Films by Electro-Plasma ...  

Science Conference Proceedings (OSTI)

Synthesis and Characterization of Plasma Polymerized Thin Films Deposited from Benzene and Hexamethyldisiloxane Using (PECVD) Method Synthesis of...

312

WM00 Conference, February 27 March 2, 2000 DEMONSTRATING DIAMOND WIRE CUTTING OF THE TFTR  

E-Print Network (OSTI)

and decommissioning (D&D) projects such as Trojan and 105c reactors at Hanford for the removal of large mass concrete of various void fillers with the DWC system CONSTRUCTION: A test bed was designed and constructed to accommodate multiple cutting scenarios. The vacuum vessel surrogates (four constructed) were of the same

313

WM00 Conference, February 27-March 2, 2000 DEMONSTRATING DIAMOND WIRE CUTTING OF THE TFTR  

E-Print Network (OSTI)

reactors at Hanford for the removal of large mass concrete. Concerns for expanded application system CONSTRUCTION: A test bed was designed and constructed to accommodate multiple cutting scenarios. The vacuum vessel surrogates (four constructed) were of the same geometric shape as the TFTR vacuum vessel

314

Plasma biasing to control the growth conditions of diamond-likecarbon  

SciTech Connect

It is well known that the structure and properties ofdiamond-like carbon, and in particular the sp3/sp2 ratio, can becontrolled by the energy of the condensing carbon ions or atoms. In manypractical cases, the energy of ions arriving at the surface of thegrowing film is determined by the bias applied to the substrate. The biascauses a sheath to form between substrate and plasma in which thepotential difference between plasma potential and surface potentialdrops. In this contribution, we demonstrate that the same results can beobtained with grounded substrates by shifting the plasma potential. This"plasma biasing" (as opposed to "substrate biasing") is shown to workwell with pulsed cathodic carbon arcs, resulting in tetrahedral amorphouscarbon (ta-C) films that are comparable to the films obtained with theconventional substrate bias. To verify the plasma bias approach, ta-Cfilms were deposited by both conventional and plasma bias andcharacterized by transmission electron microscopy (TEM) and electronenergy loss spectrometry (EELS). Detailed data for comparison of thesefilms are provided.

Anders, Andre; Pasaja, Nitisak; Lim, Sunnie H.N.; Petersen, TimC.; Keast, Vicki J.

2006-04-30T23:59:59.000Z

315

Interior of an off-campus apartment. Photo: Michael Diamond Contributor: Amanda Lanyon-LeSage  

E-Print Network (OSTI)

. Water and heat are included in rent, and residents are responsible for paying electricity. Free laundry of your own parking space! You really don't need a car to get into campus since the #80 Metro bus provides

Wisconsin at Madison, University of

316

AIR FLOW DISTRIBUTION IN A HIGH-RISE RESIDENTIAL Helmut E. Feustel and Richard C. Diamond  

E-Print Network (OSTI)

, Washington DC, 1996 Feustel, H.E. and A. Raynor-Hooson. 1990. "Fundamentals of the Multizone Air Flow Model, Washington DC, 1992. Shapiro-Baruch, Ian. 1993. "Evaluation of Ventilation in Multifamily Dwellings," New-pane windows and sliding balcony doors. The building has a mechanical ventilation system, with kitchen

Diamond, Richard

317

Diamond Windows on the 110 GHz Gyrotrons at DIII-D  

E-Print Network (OSTI)

Bull. Am. Phys. Soc. 49, 161 (2004)46th American Physical Society Annual Meeting of Division of Plasma Physics Savannah Georgia, US, 2004999611700

Gorelov, I.A.

2004-07-19T23:59:59.000Z

318

Diamond Gyrotron Windows on the DIII-D Tokamak (A25103)  

E-Print Network (OSTI)

Proc. 30th Infrared Millimeter Wave Conf., Williamsburg, Virginia, 2005; General Atomics Report GA-A25103 (2005)30th International Conference on Infrared and Millimeter Waves Williamsburg Virginia, US, 2005999610845

Gorelov, I.A.

2005-08-10T23:59:59.000Z

319

GrAnt hALL soCietY diaMond leVel  

E-Print Network (OSTI)

.........................................................................Orange Natural Resources....................................................Russet (Rust) Philosophy

Linder, Tamás

320

GrAnt hALL soCietY diaMond leVel  

E-Print Network (OSTI)

Washington University M.S. 2002, Ph.D. 2005, University of Oregon Catharine Greta Vollmer (2000) Associate

Ellis, Randy

Note: This page contains sample records for the topic "ultramar diamond shamrock" 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

Ultrananocrystalline diamond films with optimized dielectric properties for advanced RF MEMS capacitive switches  

DOE Patents (OSTI)

An efficient deposition process is provided for fabricating reliable RF MEMS capacitive switches with multilayer ultrananocrystalline (UNCD) films for more rapid recovery, charging and discharging that is effective for more than a billion cycles of operation. Significantly, the deposition process is compatible for integration with CMOS electronics and thereby can provide monolithically integrated RF MEMS capacitive switches for use with CMOS electronic devices, such as for insertion into phase array antennas for radars and other RF communication systems.

Sumant, Anirudha V.; Auciello, Orlando H.; Mancini, Derrick C.

2013-01-15T23:59:59.000Z

322

BSA 10-17: Diamond Amplified Photocathode for the Generation of ...  

Electron guns provide the electron source for the generation of X-rays for both medical and scientific research applications, ... Tags: medical applications, ...

323

Optical and spin properties of nitrogen vacancy centers in bulk and nanocrystalline diamond  

E-Print Network (OSTI)

The NV center is becoming a very hot topic in many areas of science, including, Physics, Chemistry, Biology, and Quantum Information. The Degen group has focused on a specific application of the NV center, namely scanning ...

Ofori-Okai, Benjamin Kwasi

2013-01-01T23:59:59.000Z

324

Diamond Amplified Photocathode at BNL | U.S. DOE Office of Science...  

Office of Science (SC) Website

may improve the performance of laser-photocathode RF guns by providing a robust, high quantum-efficiency, low thermal-emittance cathode. In the figure above Schematic diagram of a...

325

EA-1795: Finding of No Significant Impact  

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

Loan Guarantee to Diamond Green Diesel for Construction of the Diamond Green Diesel Facility in Norco, Louisiana

326

Comparative surface and nano-tribological characteristics of nanocomposite diamond-like carbon thin films doped by silver  

E-Print Network (OSTI)

distance, x of a-C:H/Ag from nano- scratching tests with 400Comparative surface and nano-tribological characteristics ofComparative surface and nano-tribological characteristics of

Zhang, Han-Shen

2008-01-01T23:59:59.000Z

327

High fidelity gate operations within the coupled nuclear and electron spins of a nitrogen vacancy center in diamond  

E-Print Network (OSTI)

In this article we investigate the dynamics of a single negatively charged nitrogen-vacancy center (NV-) coupled to the spin of the nucleus of a 15-nitrogen atom and show that high fidelity gate operations are possible without the need for complicated composite pulse sequences. These operations include both the electron and nuclear spin rotations, as well as an entangling gate between them. These are experimentally realizable gates with current technology of sufficiently high fidelities that they can be used to build graph states for quantum information processing tasks.

Mark S. Everitt; Simon Devitt; W. J. Munro; Kae Nemoto

2013-09-12T23:59:59.000Z

328

2 Resource Conservation District Sonya Webb 3 Diamond W Cattle Company Mike Williams Response to Comments: No. Author Comment Response  

E-Print Network (OSTI)

on the Ventura River Algae TMDL to develop a TMDL that will result in a mechanism for reducing nutrient discharges and also maintain the ability of the stakeholders in the watershed to coordinate and effectively implement the TMDLs. We feel that the TMDL that was adopted by the Los Comment noted. 1.2 Gerhardt Hubner Angeles Regional Water Board achieves that goal. We would like to express our support for the Ventura River Algae TMDL and request that the State Water Resources Control Board (SWRCB) approve the TMDL as proposed. As this is a consent decree TMDL with a deadline of March 24, 2013, we appreciate the SWRCBs rapid consideration of this TMDL. We feel it is important to get this TMDL effective as soon as possible to avoid conflicts with EPA promulgated TMDLs to address the same listings that will become effective in March 2013. Comment noted.

unknown authors

2013-01-01T23:59:59.000Z

329

Lithospheric structure, evolution and diamond prospectivity of the Rehoboth Terrane and western Kaapvaal Craton, southern Africa: Constraints from  

E-Print Network (OSTI)

., 2004; IPCC, 2005; Go¨ttlicher, 1999). The high voltage direct current (HVDC) transmission system needed is assumed to be transported via high voltage direct current (HVDC) transmission lines to the ``Ruhrgebiet

Jones, Alan G.

330

Development of a method for predicting the performance and wear of PDC (polycrystalline diamond compact) drill bits  

DOE Green Energy (OSTI)

A method is developed for predicting cutter forces, temperatures, and wear on PDC bits as well as integrated bit performance parameters such as weight-on-bit, drilling torque, and bit imbalance. A computer code called PDCWEAR has been developed to make this method available as a tool for general bit design and analysis. The method uses single-cutter data to provide a measure of rock drillability and employs theoretical considerations to account for interaction among closely spaced cutters on the bit. Experimental data are presented to establish the effects of cutter size and wearflat area on the forces that develop during rock cutting. Waterjet assistance is shown to significantly reduce cutting forces, thereby potentially extending bit life and reducing weight-on-bit and torque requirements in hard rock. The effects of several other design and operating parameters on bit life and drilling performance are also investigated.

Glowka, D.A.

1987-09-01T23:59:59.000Z

331

DEVELOPMENT OF ADVANCED DRILL COMPONENTS FOR BHA USING MICROWAVE TECHNOLOGY INCORPORATING CARBIDE, DIAMOND COMPOSITES AND FUNCTIONALLY GRADED MATERIALS  

DOE Green Energy (OSTI)

The main objective of this program was to develop an efficient and economically viable microwave processing technique to process cobalt cemented tungsten carbide with improved properties for drill-bits for advanced drilling operations for oil, gas, geothermal and excavation industries. The program was completed in three years and successfully accomplished all the states goals in the original proposal. In three years of the program, we designed and built several laboratory scale microwave sintering systems for conducting experiments on Tungsten carbide (WC) based composites in controlled atmosphere. The processing conditions were optimized and various properties were measured. The design of the system was then modified to enable it to process large commercial parts of WC/Co and in large quantities. Two high power (3-6 kW) microwave systems of 2.45 GHz were built for multi samples runs in a batch process. Once the process was optimized for best results, the technology was successfully transferred to our industrial partner, Dennis Tool Co. We helped them to built couple of prototype microwave sintering systems for carbide tool manufacturing. It was found that the microwave processed WC/Co tools are not only cost effective but also exhibited much better overall performance than the standard tools. The results of the field tests performed by Dennis Tool Co. showed remarkable advantage and improvement in their overall performance. For example: wear test shows an increase of 20-30%, corrosion test showed much higher resistance to the acid attack, erosion test exhibited about 15% better resistance than standard sinter-HIP parts. This proves the success of microwave technology for WC/Co based drilling tools. While we have successfully transferred the technology to our industrial partner Dennis Tool Co., they have signed an agreement with Valenite, a world leading WC producer of cutting and drilling tools and wear parts, to push aggressively the new microwave technology in to the marketplace.

Dinesh Agrawal; Rustum Roy

2000-11-01T23:59:59.000Z

332

High-pressure effect on dislocation density in nanosize diamond crystals C. Panteaa,*, J. Gubiczab,c  

E-Print Network (OSTI)

treatment. The method used is based on analysis of all X-ray diffraction peaks. In the past, we used. To minimize graphitization of nanodia- monds, we used water-free talc. Water acts as a catalyst for the graphitization process [4]. The water-free talc was obtained from raw talc by heating for 30 min at 1100 K

Gubicza, Jenõ

333

Polarized Ultracold Neutrons: their transport in diamond guides and potential to search for physics beyond the standard model.  

E-Print Network (OSTI)

?? Experiments with polarized ultracold neutrons (UCN) offer a new way to measure the decay correlations of neutron beta decay; these correlations can be used (more)

Makela, Mark F

2005-01-01T23:59:59.000Z

334

Air Flow Distribution in a Mechanically-Ventilated High-Rise Residential Building* Richard C. Diamond and Helmut E. Feustel  

E-Print Network (OSTI)

Council for an Energy Efficient Economy, Washington DC, 1992. SHAPIRO-BARUCH, IAN, "Evaluation. The individual apartments have electric-resistance heaters in each room, and double-pane windows and sliding retrofits. New double-pane, low-e windows replaced the old windows throughout the building. A computerized

Diamond, Richard

335

Application of High Power DC Arc Plasma for  

Science Conference Proceedings (OSTI)

Recent results in the R&D of thin diamond film coated WC-Co drills and end ... of High Quality Freestanding Diamond Films and Diamond Film Coated Cutting...

336

Battle of the Buildings EPA National Building Competition  

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

WRAP-UP REPORT WRAP-UP REPORT EPA's NATIONAL BUILDING COMPETITION Learn more about EPA's National Building Competition at energystar.gov/BattleOfTheBuildings 2 Battle to the Finish 3 And the Winner Is... 4 Stories Behind the Battle Demarest Elementary School 5 AAFES Ft. Hood Warrior Way Express Store B85001 6 Toms River Verizon Wireless 7 SHAMROCK SPRINGS ELEMENTARY SCHOOL 8 City of Atlanta's Hemphill Water Treatment Plant 9 Kmart 4863 - Gillette, WY 10 Martin Luther King, Jr. Courthouse 11 Bloomfield Middle School 12 North Carolina Area Health Education Center Building 13 Walsh & Associates, Inc. Warehouse 14 Kmart 9348 15 Kmart 7499 Mount Vernon 16 Vons Credit Union 17 Dee Events Center 18 Elk County Jail 19 Bryce Building 20 High Springs Community School 21

337

Page not found | Department of Energy  

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

Download EA-1795: Final Environmental Assessment Loan Guarantee to Diamond Green Diesel, LLC for Construction of the Diamond Green Diesel Facility in Norco, Louisiana http:...

338

Louisiana | Department of Energy  

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

18, 2011 EA-1795: Finding of No Significant Impact Loan Guarantee to Diamond Green Diesel for Construction of the Diamond Green Diesel Facility in Norco, Louisiana April 1,...

339

Louisiana | Department of Energy  

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

Vehicle Manufacturing Project in Monroe, Louisiana January 20, 2011 Diamond Green Diesel: Diversifying Our Transportation Fuel Supply Diamond Green Diesel secures a 241 loan...

340

http://scitation.aip.org/getpdf/servlet/GetPDFServlet?filetype...  

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

test results from the diamond based structure. Diamond has been chosen for its high breakdown threshold and unique thermoconductive properties. Fields produced by a leading...

Note: This page contains sample records for the topic "ultramar diamond shamrock" 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

PNNL: Breakthroughs Magazine - Summer 1998  

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

1998 issue A Diamond in the Desert A Diamond in the Desert Breakthroughs Magazine Breakthroughs Archive In this issue... Cover About Breakthroughs Contents Science of Doing...

342

National Institute of Standards and Technology Manufacturing ...  

Science Conference Proceedings (OSTI)

... The dynamics of the centerless ground stock, up ... for diamond turning, diamond milling and grinding. ... devices that utilizes selective electro- depostion ...

2013-07-01T23:59:59.000Z

343

Argonne scientists squeeze more out of metal-organic framework...  

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

a diamond anvil cell next to collaborating scientists Peter Chupas and Gregory Halder. Argonne scientist Karena Chapman holds a diamond anvil cell next to collaborating scientists...

344

Argonne CNM: 2008 Users Meeting  

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

and characterization. This course will also discuss integration of diamond films with piezoelectric materials and their applications in fabricating diamond-based MEMS and NEMS....

345

Early Proterozoic Ultrahigh Pressure Metamorphism  

E-Print Network (OSTI)

and diamond are preserved from reequilibra- tion during uplift because they are included in and armored

Cartigny, Pierre

346

Rochester Institute of Technology Chester F. Carlson Center for Imaging Science  

E-Print Network (OSTI)

(shaded curve) (14), pedogenic goethite (filled circle) (11), trona and nahcolite (filled diamonds) (12

Zanibbi, Richard

347

Humboldt National Forest East Mormon  

E-Print Network (OSTI)

Vegas Blue Diamond Paradise Trona Spring Valley Searles Valley Tonopah Chloride Searchlight Shoshone

Laughlin, Robert B.

348

Waste Gasification by Thermal Plasma: A Review Frdric Fabry*, Christophe Rehmet, Vandad Rohani, Laurent Fulcheri  

E-Print Network (OSTI)

diamond. We describe a new ultrananocrystalline diamond (UNCD) film technology based on a microwave plasma 542 3.2. Ar-rich CH4/Ar microwave plasma growth process for ultrananocrystalline diamond (UNCD) films-rich CH4/Ar microwave plasma growth process for ultrananocrystalline diamond (UNCD) films In the process

349

10th North American Waste to Energy Conference NAWTEC10-1028  

E-Print Network (OSTI)

diamond. We describe a new ultrananocrystalline diamond (UNCD) film technology based on a microwave plasma 542 3.2. Ar-rich CH4/Ar microwave plasma growth process for ultrananocrystalline diamond (UNCD) films-rich CH4/Ar microwave plasma growth process for ultrananocrystalline diamond (UNCD) films In the process

Columbia University

350

4155 Diamond Head Road Honolulu, HI 96816 Tel: 808-734-2101 Fax: 808-735-8626 www.hawaiiredcross.org April 20, 2007  

E-Print Network (OSTI)

sign-up table will promote our life saving training and disaster response training in order to recruit community to make individual and family disaster plans and to put together personal disaster kits. Admission individual and family disaster kits, battery-less radio/flashlights, first aid kits, and related items. Our

Wang, Yuqing

351

Summary year 2: A study of potential high band-gap photovoltaic materials for a two step photon intermediate technique in fission energy conversion  

DOE Green Energy (OSTI)

The production of single crystal diamond thin films of large area would be a technological breakthrough for a variety of electronic and optical applications. In terms of the objectives of this contract, single crystal films would produce high quality doped regions and thus better barriers for energy conversion in the vacuum ultraviolet. To date, diamond single crystal films have been made homo-epitaxially on natural or synthetic diamond single crystals. As large single crystal diamond is prohibitively expensive, there is a need to find matching substrates for diamond heteropolarities. Cubic boron nitride has the diamond lattice structure and matches nearly perfectly the cell dimensions. However, large area cubic BN single crystal substrates are not available, as c-BN is stable, just like diamond, at high pressures and high temperatures only. The widely used Si substrates have a large lattice constant mismatch with diamond.

Prelas, M.A.; Charlson, E.J.; Charlson, E.M. [and others

1996-11-01T23:59:59.000Z

352

PowerPoint Presentation  

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

2007 Euclid Techlabs LLC CVD-diamond Ka-band 5 mm ID cylindrical waveguide * Scanning electron microscope images of a THz diamond microstructure produced using the hot wire...

353

Design, Status, and First Operations of the Spallation Neutron ...  

Science Conference Proceedings (OSTI)

... Oven Temperature Control Stack Lamination Insulation Wet Lay-Up Dry Core Cutting Water Jet, EDM, Diamond Saw Core Annealing ...

2013-08-20T23:59:59.000Z

354

Anomalous radial transport in tokamak edge plasma  

E-Print Network (OSTI)

Beg Patrick Diamond Asoka Mendis Sutanu Sarkar Copyrightwith Prof. D. Asoka Mendis are always very inspiring. There

Bodi, Vasudeva Raghavendra Kowsik

2010-01-01T23:59:59.000Z

355

Photoluminescence of P-Type CdTe Thin Films  

Science Conference Proceedings (OSTI)

Incorporation of Granite Waste Diamond Wire in Cementitious Matrices Indium Extraction Process from Sulfuric Pressure Leaching Solution for Vacuum...

356

H17: Fabrication of Dense Non-circular Nanomagnetic Device ...  

Science Conference Proceedings (OSTI)

Challenge to Development of Diamond Power Devices for Saving Energy Controllable Growth and Manipulation of Electric and Magnetic Properties of...

357

THE ASSESSMENT OF TOXICITY AFTER EXPOSURE TO A ...  

Science Conference Proceedings (OSTI)

... placed pressure upon manufacturers to develop ... At the recommeded manufacturer use concentration, the ... with diamond wafering blade (Evanston, ...

2011-11-01T23:59:59.000Z

358

Special Programs  

Science Conference Proceedings (OSTI)

... enrolled in our Kindergarten program, as well as students enrolled at Diamond Elementary School. Montgomery County Public Schools provide pick ...

2013-06-21T23:59:59.000Z

359

Monday AM Session Abstracts  

Science Conference Proceedings (OSTI)

... of amorphous diamond, chromium, and noble metals for various applications ...... A comprehensive literature search was conducted to identify publications of...

360

Acta Astronautica Vol. 48, No. 23, pp. 129144, 2001 ? 2001 Published by Elsevier Science Ltd.  

E-Print Network (OSTI)

the nucleation den- sity, area covered, and growth rate. As described later, preliminary modeling monohydrated diamond (1 0 0) surface, which is expected in the presence of hydrogen atoms, was modeled in [64 embedded, prior to growth of diamond crystals [76]. A nucleation and growth model for diamond was proposed

Regel, Liya L.

Note: This page contains sample records for the topic "ultramar diamond shamrock" 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

New SRM for Bullet Casings  

Science Conference Proceedings (OSTI)

... diamond cutting tool was used to machine the surface of each with a set of six different characteristic striations, or land impressions, similar to ...

2013-01-03T23:59:59.000Z

362

Effect of Cobalt on PCD Fracture Toughness  

Science Conference Proceedings (OSTI)

... Polycrystalline diamond (PCD) is commonly used in applications requiring high abrasion resistance such as oil and gas drilling and industrial cutting tools.

363

New Journal of Physics  

Science Conference Proceedings (OSTI)

... Mill bulk of substrate with diamond drill ... slot in the surface connecting the drilled channel (figure ... was centered on this perimeter, cutting equally into ...

2010-04-22T23:59:59.000Z

364

Towards Understanding the Tool Demands for HSM of Ti6Al4V  

Science Conference Proceedings (OSTI)

Challenges in Applying Diamond Coatings to Carbide Twist Drills ... Investigation of a Hybrid Cutting Tool Design for Shearing Operations of Sheet Metals.

365

Investigation of a Hybrid Cutting Tool Design for Shearing ...  

Science Conference Proceedings (OSTI)

Presentation Title, Investigation of a Hybrid Cutting Tool Design for Shearing Operations of ... Challenges in Applying Diamond Coatings to Carbide Twist Drills.

366

Effect of Die Entry Angle on Extrusion Responses of Aluminum 6063 ...  

Science Conference Proceedings (OSTI)

Challenges in Applying Diamond Coatings to Carbide Twist Drills ... Investigation of a Hybrid Cutting Tool Design for Shearing Operations of Sheet Metals.

367

Laser Cladding of Wear Resistant CPM-9V Tool Steel on Pre ...  

Science Conference Proceedings (OSTI)

Challenges in Applying Diamond Coatings to Carbide Twist Drills ... Investigation of a Hybrid Cutting Tool Design for Shearing Operations of Sheet Metals.

368

Magnetostriction Measurements of Electrical Steel Sheets by Means ...  

Science Conference Proceedings (OSTI)

Nowadays transformer noise becomes also important as well as transformer energy ... Challenge to Development of Diamond Power Devices for Saving Energy.

369

Berkeley Lab - Materials Sciences Division  

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

enhance the sensitivity of NMRMRI experiments in bulk materials, in nuclear-based spintronics, and quantum computation in diamond. Summary Dynamic nuclear polarization, which...

370

NREL: Energy Sciences - Computational Materials Science  

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

Version Computational Materials Science Illustration of molecular structure. Overall shape is a somewhat canted diamond, with a grid of small green balls connected in either a...

371

Presented at HALON OPTIONS TECHNICAL WORKING ...  

Science Conference Proceedings (OSTI)

... The internal measurements were taken by Hughes Associates, Inc. using a KVB/Analect Diamond 20 FTIR with calcium fluoride (CaF2) windows. ...

2011-10-04T23:59:59.000Z

372

Argonne CNM: 2005 Research Highlights  

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

5 Highlights Mixed Metals not so Mixed Up at the Nano Level (November 2005) Diamond Nanotube Technology Promises New Electronics Products (September 2005) Argonne researchers...

373

Nanostructured Carbide Derived Carbon (CDC)  

... can be grown at rates up to 100 micrometers per hour and is composed of graphite, diamond, amorphous carbon and carbon "nano-onions" ...

374

SLAC National Accelerator Laboratory - SLAC Public Lecture Series  

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

happening at the laboratory. From the nanotechnology of diamonds to the latest Higgs Boson discoveries, SLAC public lectures provide non-scientists with a unique insight into...

375

Postdoctoral Society of Argonne - Career Fair  

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

BASF Job Postings available from Brookhaven National Lab and Lawrence Livermore National Laboratory Higher Education Recruitment Consortium Diamond Innovations GE Healthcare...

376

Efficient Serial and Parallel Coordinate Descent Methods for Huge ...  

E-Print Network (OSTI)

Jun 30, 2011 ... position, storing potential energy (compliance). Trusses of smaller ..... ground ( at the small green diamonds). We have used x0 = 0 for which...

377

Solid Cold - D  

Office of Scientific and Technical Information (OSTI)

Diamond (carbon) has atoms of low mass, and absorbs far less heat per degree temperature increase than many other materials, even at room temperature. This is in clear...

378

Defining a standard metric for electricity savings  

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

Brown, Chris Calwell, Sheryl Carter, Ralph Cavanagh, Audrey Chang, David Claridge, Paul Craig, Richard C. Diamond, Joseph H. Eto, William Fulkerson, Ashok J. Gadgil, Howard Geller,...

379

Publications  

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

air flow rates. Lawrence Berkeley National Laboratory, 2006. 2004 Diamond, Richard C., Craig P. Wray, Brian V. Smith, Darryl J. Dickerhoff, Nance Matson, and Skylar A. Cox. A...

380

Publications  

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

Council for an Energy Efficient Economy, Washington, DC, 2004. Diamond, Richard C., Craig P. Wray, Brian V. Smith, Darryl J. Dickerhoff, Nance Matson, and Skylar A. Cox. A...

Note: This page contains sample records for the topic "ultramar diamond shamrock" 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.


381

1997 EMC: Wednesday Morning Sessions  

Science Conference Proceedings (OSTI)

The search for a diamond cold cathode has been inhibited by the availability of a ..... transmission electron microscopy (TEM) studies of phase identifications and...

382

Building Energy Retrofit Research: Multifamily Sector  

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

Building Energy Retrofit Research: Multifamily Sector Title Building Energy Retrofit Research: Multifamily Sector Publication Type Report Year of Publication 1985 Authors Diamond,...

383

Lawrence Livermore National Laboratory (LLNL)  

National Nuclear Security Administration (NNSA)

installation of X-ray powder diffractometer with imaging plate detector and diamond anvil cell, calibration and test experiments. Purpose of Work: Our goal is a better...

384

EV Everywhere Framing Workshop Report Out & Lessons Learned  

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

* Robbie Diamond, The Electrification Coalition * Bart Riley, A123 Systems * Mike Rowand, Duke Energy eere.energy.gov Breakout Groups 1. Batteries 2. Drivetrain (Power Electronics...

385

Simplex Network Modeling for Press-Molded Ceramic Bodies ...  

Science Conference Proceedings (OSTI)

In this work were added different proportions of the sticky residue granite, comprising diamond wire on concrete for evaluation of mechanical properties,...

386

Publications  

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

J., Richard C. Diamond, Jeffrey C. Mitchell, Erik Page, Kevin W. Gauna, Laura McLaughlin, and Doug A. Avery. Lighting Retrofit Workbook. Lawrence Berkeley National...

387

Stanford University | .EDUconnections  

Office of Scientific and Technical Information (OSTI)

Prof. Wendy Mao create amorphous diamond Stanford University Dept. of Sustainability and Energy Management Stanford School of Engineering San Francisco, bordered by the Bay and...

388

NIST: Electron-Impact Cross Section Database - References  

Science Conference Proceedings (OSTI)

... Errata: (a) Page 2962, caption to Fig. 7, last item: "triangles, data by Orient ..." should read "diamonds, data by Orient ..." (b) Page 2966, Ref. ...

389

Addiction Treatment  

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

81 September 9, 1999 For more information, contact: Diane Greenberg, Brookhaven National Laboratory, 516 344-2347, or Glenn Diamond, David Pharmaceuticals, Inc., 650 579-2870...

390

The Entire Environmental and Earth Science Archive  

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

Tides Filtering Sediments Diamond Colors Iceberg Composition Ice Cores Slicks Geomagnetic Drift Earth's Core Geomagnetic Drift (2) Tilt of Earth's Axis Water's Origin Void...

391

Seventh International Mining Geology Conference 2009  

Science Conference Proceedings (OSTI)

Dec 31, 2012 ... A compact disk (CD) version of the Seventh International Mining ... and cover commodities such as bauxite, coal, diamonds, gold, silver,...

392

Diamondoid Monolayers as Monochromatic Electron Source  

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

Diamondoid Monolayers as Monochromatic Electron Source Print Diamondoids are nanometer-sized molecules that feature diamond-crystal cage structures. Adamantane, the smallest member...

393

Materials | Argonne National Laboratory  

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

Open the Door to New Medical Innovations Nanomaterials Analysis using a Scanning Electron Microscope Robust Diamond-Based RF Switch Yields Enhanced Communication...

394

SLAC National Accelerator Laboratory - Forces Within Molecules...  

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

diamondoids, which are molecule-sized diamonds pioneered by SIMES researchers. Ethane, propane and octane are familiar alkanes that have backbones of two, three and eight carbon...

395

Minerals, Metals and Materials under Pressure  

Science Conference Proceedings (OSTI)

New diamond-anvil, shock-loading and computational techniques ... Probing the Role of Temperature on Texture Evolution in Tantalum during Dynamic-Tensile-...

396

An Assessment of Prices of Natural Gas Futures Contracts As  

U.S. Energy Information Administration (EIA)

generally used as a financial risk management and ... explicitly encourage this view. ... The diamond-shaped points represent the average monthly spot prices at the ...

397

Page not found | Department of Energy  

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

Exclusion Determination United Parcel Service (UPS) Ontario-Las Vegas Liquified Natural Gas Corridor CX(s) Applied: A9 Date: 12112009 Location(s): Diamond Bar, California...

398

Revealing myths about people, energy and buildings  

E-Print Network (OSTI)

Myths about People, Energy and Buildings Rick Diamond andmyths about people, energy and buildings are current today?myths about people, energy and buildings? Who tells these

Diamond, R.

2011-01-01T23:59:59.000Z

399

Stanford Synchrotron Radiation Lightsource: Sample Preparation...  

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

Supplies Available For Check Out Agate Mortar & Pestle Sets Buchi V-700 Vacuum Pump & condenser Campden Instruments Vibrating Manual Tissue Cutter HA 752 Diamond Scribes & Glass...

400

Exploration of Novel Carbon-Hydrogen Interactions - DOE Hydrogen...  

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

provided by mechanochemistry, including dynamic shearingcompression via mechanical milling and static high-pressure chemistry in a diamond anvil cell. Materials are currently...

Note: This page contains sample records for the topic "ultramar diamond shamrock" 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.


401

Session III  

Science Conference Proceedings (OSTI)

Oct 21, 2010 ... The use of direct diode laser systems to selectively laser harden or ... it can offer a cost effective solution over traditional diamond grinding.

402

Performance Enhanced Nanostructured Thermoelectric Materials ...  

Science Conference Proceedings (OSTI)

... for applications in solar energy conversion and waste heat conversion. ... Bond Networks, Conduction Channels, and More: Diamond-like Compounds as a...

403

Towards a Policy of Progressive Efficiency  

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

Efficiency Title Towards a Policy of Progressive Efficiency Publication Type Book Chapter Year of Publication 2010 Authors Harris, Jeffrey P., Richard C. Diamond, Carl...

404

NEWTON's Chemistry Archive  

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

in Filter Evaporation Experiment Gain? Energy in a System "Apparent Melting" Steel Wool, Soap, Water Absorption Diamond Growth and Seeds Energy for Sublimation Diffusion and...

405

Part 1, Chapter 8: Reference Models  

Science Conference Proceedings (OSTI)

... Bar. Fork/join. Diamond. Decision/merge. Dog-eared rectangle. Note. To simplify the diagrams, the following shortcuts have been taken: ...

406

Coal-fueled diesel technology development: Nozzle development for coal-fueled diesel engines  

SciTech Connect

Direct injection of a micronized coal water mixture fuel into the combustion chambers of a diesel engine requires atomizing an abrasive slurry fuel with accurately sized orifices. Five injector orifice materials were evaluated: diamond compacts, chemical vapor deposited diamond tubes, thermally stabilized diamond, tungsten carbide with cobalt binder, and tungsten carbide with nickel binder with brazed and mechanically mounted orifice inserts. Nozzle bodies were fabricated of Armco 17-4 precipitation hardening stainless steel and Stellite 6B in order to withstand cyclic injection pressures and elevated temperatures. Based on a total of approximately 200 cylinder hours of engine operation with coal water mixture fuel diamond compacts were chosen for the orifice material.

Johnson, R.N.; Lee, M.; White, R.A.

1994-01-01T23:59:59.000Z

407

Larry A. Curtiss - Argonne National Laboratories, Materials Sicence...  

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

of thermochemical data. Quantum chemical studies of new battery materials, nanocrystalline diamond, catalysis reaction mechanisms in zeolites, clusters, molten salt materials....

408

Division Personnel - Argonne National Laboratories, Materials...  

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

materials, nanocrystalline diamond, catalysis reaction mechanisms in zeolites, clusters, molten salt materials.

    • ...

      409

      Advanced Magnetic Materials for Next Generation Data Storage ...  

      Science Conference Proceedings (OSTI)

      All Solid State 2-Dimensional Li Battery Alloy Design and ... Rare-Earth Magnets Challenge to Development of Diamond Power Devices for Saving Energy.

      410

      --No Title--  

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

      Exploration of quantum computer architectures with spins in silicon and diamond Thomas Schenkel (LBNL) Abstract: Quantum computing promises to revolutionize information technology,...

      411

      The Surprising Appearance of Nanotubular Fullerene D5h(1)-C90  

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

      and graphite have been joined by new allotropes: fullerenes, carbon nanotubes, and graphene. Diamond consists of four-coordinate carbon atoms with tetrahedral geometry, while...

      412

      Emergency Links: NIST Identifies 'Sweet Spot' for Radios in ...  

      Science Conference Proceedings (OSTI)

      ... 2007 at Black Diamond Mines Regional Park near Antioch, Calif., an old complex used in the early 1900s to extract pure sand for glass production. ...

      2011-07-15T23:59:59.000Z

      413

      Interplay of superconductivity, magnetism, and density waves in rare-earth tritellurides and iron-based superconducting materials  

      E-Print Network (OSTI)

      1. Electrical Resistivity . . . . . . . . . . . . . 2.diamond, for electrical resistivity measurements, as can beRoom-temperature electrical resistivity ? as a function of

      Zocco, Diego Andrs

      2011-01-01T23:59:59.000Z

      414

      The development stories of equatorial Guinea and Botswana : a game theory model of how public-private partnerships can turn resources from a curse into a blessing  

      E-Print Network (OSTI)

      The growth acceleration episodes characterizing Botswana and Equatorial Guinea were based on the respective discoveries of diamonds and oil. However, while Botswana, already characterized by inclusive and democratic ...

      Rizzati, Valentina

      2013-01-01T23:59:59.000Z

      415

      Argonne CNM Highlight: Mechanical energy dissipation in  

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

      Mechanical Energy Dissipation in Ultrananocrystalline Diamond Microresonators Mechanical Energy Dissipation in Ultrananocrystalline Diamond Microresonators SEM micrograph of UNCD microresonator SEM micrograph of fabricated UNCD microresonator Researchers in the Nanofabrication and Devices group, in collaboration with the University of Pennsylvania, Advanced Diamond Technologies Inc., and Innovative Micro Technology, have discovered that defects at the grain boundary in ultrananocrystalline diamond (UNCD) hold primary responsibility for the fundamental mechanism of energy dissipation. Because of a high Young's modulus and high sound propagation velocity, UNCD materials hold potential for fabricating high-frequency microelectromechanical (MEMS) resonators. However, their mechanical dissipation at high frequency, which is important for developing high-frequency resonator applications, is not

      416

      Publications  

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

      David Heslam, and Richard C. Diamond. Behavioral Perspectives on Home Energy Audits: The Role of Auditors, Labels, Reports, and Audit Tools on Homeowner Decision---Making.., 2012...

      417

      Microsoft PowerPoint - Eres ORNL 2008-4  

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

      of Diamond Films Presenter: Gyula Eres Oak Ridge National Laboratory Annual DOE Peer Review Meeting - 2008 DOE Power Electronics Research Program Washington, DC 30 September 2008...

      418

      Larry A. Curtiss Theory and Modeling Group  

      E-Print Network (OSTI)

      chemical approaches for accurate energy calculations. This has resulted in the successful Gaussian-n series techniques for probing physical and chemical properties of materials at the atomic level, it is imperative to the fundamental understanding of ultrananocrystalline diamond (UNCD), a new form of diamond that was discovered

      Kaper, Hans G.

      419

      EA-1795: Floodplain Statement of Findings | Department of Energy  

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

      5: Floodplain Statement of Findings 5: Floodplain Statement of Findings EA-1795: Floodplain Statement of Findings Loan Guarantee to Diamond Green Diesel for Construction of the Diamond Green Diesel Facility in Norco, Louisiana The Department of Energy proposed action is to issue a loan guarantee to Diamond Green Diesel, LLC to support construction of a biomass-based diesel facility adjacent to the existing Valero St. Charles Refinery in Norco, Louisiana. Attachment Floodplain Statement of Findings for Department of Energy Loan Guarantee to Diamond Green Diesel for Construction of the Diamond Grenn Diesel Facility in Norco, Louisiana, DOE/EA-1795 More Documents & Publications EA-1795: Finding of No Significant Impact EA-1795: Final Environmental Assessment U.S. Department of Energy Emergency Support Function

      420

      Analysis of particle penetration into aluminum plate using underwater shock wave  

      Science Conference Proceedings (OSTI)

      Some techniques using underwater shock waves have been developed for several material processing applications: explosive welding, shock compaction, and shock synthesis. In this research, a new technique was developed for surface modification of an aluminum plate. Diamond particles were accelerated by an underwater shock wave and penetrated into an aluminum plate, creating a surface coating of diamond on the aluminum plate. In the observation of the cross-section of the recovered Al-diamond composite, a rich diamond layer was confirmed at about 200 {mu}m depth. XRD and wear measurements were conducted for the recovered Al-diamond composite. We also report on the optical observation of the underwater shock wave in this paper.

      Tanaka, S. [Faculty of engineering, Kumamoto University, 2-39-1 Kurokami, Kumamoto City, Kumamoto 860-8555 (Japan); Hokamoto, K.; Itoh, S. [Shock Wave and Condensed Matter Research Center, Kumamoto University, 2-39-1 Kurokami, Kumamoto City, Kumamoto 860-8555 (Japan)

      2007-12-12T23:59:59.000Z

      Note: This page contains sample records for the topic "ultramar diamond shamrock" 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.


      421

      Lab Spotlight: Argonne National Laboratory  

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

      Lab Spotlight: Argonne National Laboratory Lab Spotlight: Argonne National Laboratory ultrananocrystalline diamond (UNCD) technology Researchers John Carlisle (left) and Orlando Auciello (right) are developing an ultrathin biocompatible coating for the device. Creating Diamond Coatings for the Retinal Implant Argonne National Laboratory (ANL) plays a critical role in the success of the electrode implants used in the Artificial Retina Project. That's where researchers Orlando Auciello and colleague John Carlisle are using their patented ultrananocrystalline diamond (UNCD) technology to apply a revolutionary new coating to the retinal prosthetic device. The new packaging promises to provide a very thin, ultrasmooth film that will be far more compact and biocompatible than the bulky materials used to encase

      422

      EA-1795: Finding of No Significant Impact | Department of Energy  

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

      795: Finding of No Significant Impact 795: Finding of No Significant Impact EA-1795: Finding of No Significant Impact Loan Guarantee to Diamond Green Diesel for Construction of the Diamond Green Diesel Facility in Norco, Louisiana The Department of Energy conducted an environmental assessment that analyzed the potential environmental impacts associated with the construction and operation of a biomass-based diesel facility adjacent to the existing Valero St. Charles Refinery in Norco, Louisiana. Finding of No Significant Impact Department of Energy Loan Guarantee to Diamond Green Diesel for Construction of the Diamond Green Diesel Facility in Norco, Louisiana, DOE/EA-1795 (April 2011) More Documents & Publications EA-1795: Floodplain Statement of Findings EA-1795: Final Environmental Assessment

      423

      Fermilab Today  

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

      Search GO Calendar Thurs., June 14 10:30 a.m. Research Techniques Seminar - WH-10NW, West Wing Speaker: J. Hamilton, University of Wisconsin, Platteville Title: Diamonds in...

      424

      EA-1795: Final Environmental Assessment | Department of Energy  

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

      5: Final Environmental Assessment 5: Final Environmental Assessment EA-1795: Final Environmental Assessment Loan Guarantee to Diamond Green Diesel, LLC for Construction of the Diamond Green Diesel Facility in Norco, Louisiana The U.S. Department of Energy (DOE) is proposing to issue a $241 million loan guarantee to Diamond Green Diesel, LLC (Diamond) to support construction of a biomass-based diesel facility adjacent to the existing Valero St. Charles Refinery (VSCR) in Norco, Louisiana. DOE has prepared this Environmental Assessment (EA) to comply with the National Environmental Policy Act (NEPA) (42 USC 4321, et. seq.), Council on Environmental Quality regulations for implementing NEPA (40 CFR Parts 1500-1508), and DOE Implementing Procedures (10 CFR Part 1021). The EA examines the potential environmental impacts associated with the proposed

      425

      Microsoft Word - DOE EA-1795  

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

      5 5 ENVIRONMENTAL ASSESSMENT FOR DEPARTMENT OF ENERGY LOAN GUARANTEE TO DIAMOND GREEN DIESEL, LLC FOR CONSTRUCTION OF THE DIAMOND GREEN DIESEL FACILITY IN NORCO, LOUISIANA U.S. Department of Energy Loan Programs Office Washington, DC 20585 April 2011 FINAL ENVIRONMENTAL ASSESSMENT Environmental Assessment DOE/EA-1795 i SUMMARY Introduction The U.S. Department of Energy (DOE) is proposing to issue a $241 million loan guarantee to Diamond Green Diesel, LLC (Diamond) to support construction of a biomass-based diesel facility adjacent to the existing Valero St. Charles Refinery (VSCR) in Norco, Louisiana. DOE has prepared this Environmental Assessment (EA) to comply with the National Environmental Policy Act (NEPA) (42 USC 4321, et. seq.), Council on Environmental Quality

      426

      F. Zhao and L. Guibas (Eds.): IPSN 2003, LNCS 2634, pp. 518528, 2003. Springer-Verlag Berlin Heidelberg 2003  

      E-Print Network (OSTI)

      water level and temperature (circles), stream chemistry (crosses), air pressure (squares), air temperature and humidity (diamonds), and air temperature alone (triangles). Circled stations have been technologies designed for low maintenance operation, low power consumption and small, unobtrusive footprints

      Lundquist, Jessica

      427

      Robust RF Switch Yields Enhanced Communication Capabilities (ANL-IN-09-053 and ANL-IN-09-070)  

      Scientists at Argonne National Laboratory have created a special radio frequency (RF) microelectromechanical system (MEMS) switch based on ultra nanocrystalline diamond (UNCD) as a dielectric that promises a next generation of military and commercial ...

      428

      Colorado's 5th congressional district: Energy Resources | Open...  

      Open Energy Info (EERE)

      International Diamond Wire Technology LLC Larankelo Mobile Energy Products Inc Power House Solar and Wind Solar World USA not SolarWorld AG Sun Dog Energy VerdeLogix Energy...

      429

      INFRARED MONITORING OF 110GHz GYROTRON WINDOWS AT DIII-D  

      SciTech Connect

      The combination of low millimeter wave losses and excellent thermal conductivity with good mechanical properties make artificial chemical vapor deposition (CVD) diamonds a compelling choice for 1 MW 110 GHz gyrotron windows. Five gyrotrons are currently operating at the DIII-D tokamak. Three Gycom gyrotrons have boron nitride (BN) ceramic windows. Due to temperature increases of the windows up to about 930 C, the pulse duration of these tubes is limited to 2 s for output power near 800 kW. Two Communications and Power Industries (CPI) gyrotrons with diamond windows are also installed and operating. The diamond disks of these windows and the construction of their water-cooling assemblies are different. This paper reviews the infrared (IR) measurements of both types of gyrotron windows, with emphasis on the two diamond designs.

      Y. GORELOV; J. LOHR; R.W. CALLIS; D. PONCE

      2002-05-01T23:59:59.000Z

      430

      U.S. DEPARTMENT OF ENERGY - NETL CATEGORICAL EXCLUSION (CX) DESIGNATIO...  

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

      DE-EE0002547 South Coast Air Quality Mgmt Dist. EE Heavy-Duty LNG Drayage Truck Prg Vehicle Technology Division 2010 Mike Bednarz 12109 12312013 21865 Copley Drive, Diamond...

      431

      U.S. DEPARTMENT OF ENERGY - NETL CATEGORICAL EXCLUSION (CX) DESIGNATIO...  

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

      562 South Coast Air Quality Mgmt Dist. EE UPS Ontario-Las Vegas LNG Corrid Vehicle Technology Division 2010 Mike Bednarz 12109 12312013 21865 Copley Drive, Diamond Bar, CA,...

      432

      Wireless Demand Response Controls for HVAC  

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

      Wireless Demand Response Controls for HVAC Speaker(s): Clifford Federspiel Date: June 22, 2006 - 12:00pm Location: 90-3148 Seminar HostPoint of Contact: Richard Diamond Peng Xu We...

      433

      Preparation of Nd-Fe-B Magnetic Particles by Spray Drying and ...  

      Science Conference Proceedings (OSTI)

      An aerosol-assisted self-assembly technique with a spray drying method was employed ... Challenge to Development of Diamond Power Devices for Saving Energy ... H1: 4 Terminal Non-local Signals in Lateral Transport Devices with Various...

      434

      Publications  

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

      (Desc) Filters: Author is Skylar A. Cox Clear All Filters 2004 Diamond, Richard C., Craig P. Wray, Brian V. Smith, Darryl J. Dickerhoff, Nance Matson, and Skylar A. Cox. A...

      435

      jp407595u 1..8  

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

      "universal" liquid Hugoniot 51 for H 2 O 2 (black dashed line). The solid black line is a thermochemical calculation of the fully reacted Hugoniot, and the black diamond specifies...

      436

      NEW MIGRATIONS TO ISRAEL AND THE EMERGENCE OF A COSMOPOLITAN TEL AVIV DR. WILLIAM BERTHOMIERE  

      E-Print Network (OSTI)

      NEW MIGRATIONS TO ISRAEL AND THE EMERGENCE OF A COSMOPOLITAN TEL AVIV BY DR. WILLIAM BERTHOMIERE AT THE CONFERENCE COSMOPOLITANISM & ANTHROPOLOGY ASA 2006 DIAMOND JUBILEE CONFERENCE - KEELE UNIVERSITY 10-13 APRIL

      Paris-Sud XI, Université de

      437

      Ordinal completeness of bimodal provability logic GLB  

      Science Conference Proceedings (OSTI)

      Bimodal provability logic GLB, introduced by G. Japaridze, currently plays an important role in the applications of provability logic to proof-theoretic analysis. Its topological semantics interprets diamond modalities as derived set operators on a bi-scattered ...

      Lev Beklemishev

      2009-09-01T23:59:59.000Z

      438

      14.452 Macroeconomic Theory II, Spring 2005  

      E-Print Network (OSTI)

      The basic machines of macroeconomics. Ramsey, Solow, Samuelson-Diamond, RBCs, ISLM, Mundell-Fleming, Fischer-Taylor. How they work, what shortcuts they take, and how they can be used. Half-term subject. From the course ...

      Blanchard, Olivier (Olivier J.)

      439

      SmartCast: Instrumented Casts for Monitoring and Intervention during Bone Healing Process  

      E-Print Network (OSTI)

      with a diamond pattern of carbon fibers providing surfaceIt is 87% polyester with 13% carbon fibers woven into it.The carbon fibers are conducting [29]. The Velostat is a

      Shahbazi, Maryam

      2013-01-01T23:59:59.000Z

      440

      Delamere-JS  

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

      of particles from mid-level clouds to low-level clouds, and the occurrence of low-level ice clouds ("diamond dust"), which extend to the surface. This study addresses the...

      Note: This page contains sample records for the topic "ultramar diamond shamrock" 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.


      441

      FERMILAB-TM-XXXX-DO  

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

      T-979 Ultra-Fast Timing T-977 MINERA Experiment Detector Calibration T-953 U. Iowa Cerenkov Light Tests T-932 Diamond Detector 27 Developing a New Tertiary Low-Energy Beamline...

      442

      August 29, 2013  

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

      August 29, 2013 August 29, 2013 Print Thursday, 11 April 2013 08:37 Date-Change: Thursday, August 29 @ 12 noon in USB 15-253 beavers Under Pressure: Why Diamonds Are a...

      443

      Uniform Logical Characterizations of Testing Equivalences for Nondeterministic, Probabilistic and Markovian Processes  

      Science Conference Proceedings (OSTI)

      Logical characterizations of nondeterministic, probabilistic, and Markovian variants of bisimulation equivalence rely on similar modal languages, each including true, negation, conjunction, and diamond. Likewise, logical characterizations of the corresponding ... Keywords: Markovian processes, modal logic, nondeterministic processes, probabilistic processes, testing equivalence

      Marco Bernardo

      2009-11-01T23:59:59.000Z

      444

      Definition: Core Holes | Open Energy Information  

      Open Energy Info (EERE)

      Holes Jump to: navigation, search Dictionary.png Core Holes A core hole is a well that is drilled using a hallow drill bit coated with synthetic diamonds for the purposes of...

      445

      Electron Microscopy Center  

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

      Ewoldt, Z. Liang, R. Edwin Garcia, E. A. Stach, T. D. Sands (Purdue U. and Birck Nanotechnology Center); N. J. Zaluzec (Argonne-MSD-EMC) Diamond Nanowires and the Mechanism of...

      446

      SLAC National Accelerator Laboratory - New Test Bed Probes the...  

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

      New Test Bed Probes the Origin of Pulses at LCLS By Glenn Roberts Jr. July 23, 2013 It all comes down to one tiny spot on a diamond-cut, highly pure copper plate. That's where...

      447

      Sustainable Building in China-A Green Leap Forward?  

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

      Building in China-A Green Leap Forward? Title Sustainable Building in China-A Green Leap Forward? Publication Type Journal Article Year of Publication 2013 Authors Diamond, Richard...

      448

      Strain-Dependent Photoluminescence Behavior of CdSe/CdS Nanocrystals with Spherical, Linear, and Branched Topologies  

      E-Print Network (OSTI)

      emission peak maxima for CdSe/CdS rods of different lengthsfluorescence spectra of bare zb-CdSe dots in a diamond anvilPhotoluminescence Behavior of CdSe/CdS Nanocrystals with

      Choi, Charina L.

      2010-01-01T23:59:59.000Z

      449

      Spin effects in single-electron transistors  

      E-Print Network (OSTI)

      Basic electron transport phenomena observed in single-electron transistors (SETs) are introduced, such as Coulomb-blockade diamonds, inelastic cotunneling thresholds, the spin-1/2 Kondo effect, and Fano interference. With ...

      Granger, Ghislain

      2005-01-01T23:59:59.000Z

      450

      Minerals yearbook: Mineral industries of Africa. Volume 3. 1990 international review  

      SciTech Connect

      The 53 countries that constituted Africa in 1990 accounted for a significant portion of total world output of a number of mineral commodities. Among the most significant to be produced in Africa were andalusite, antimony, asbestos, bauxite, chromite, coal, cobalt, copper, diamond, fluorspar, gold, lithium minerals, manganese, phosphate, platinum-group metals, the titanium minerals--ilmenite and rutile, vanadium, vermiculite, uranium, and zircon. Several of these, chromite, cobalt, diamond, and manganese, were not produced in the United States.

      Not Available

      1990-01-01T23:59:59.000Z

      451

      Geothermal Compax drill bit development. Semiannual technical report, July 1, 1976--December 31, 1976  

      DOE Green Energy (OSTI)

      Results obtained from instrumented single-diamond compact cutter experiments, wear and failure mode analysis, and preliminary bit design concepts are described. A model was developed relating rock cutting forces to the independent diamond cutting variables, using a statistical test design and regression analysis. The model was tested with additional independent cutting data and a satisfactory fit obtained. Experiments on two rock types (with compressive strengths of 8 x 10/sup 3/ psi and 21 x 10/sup 3/ psi respectively) were completed and a third has been initiated. Preliminary analysis of single cutter experimental results indicates that optimum rake angles for cutters on an actual bit will be a function of each cutter's engagement (depth of cut). Wear test results on five types of COMPAX/sup R/ diamond compacts continuously cutting sandstone under non-impact conditions are reported. Wear rates for both types were equivalent at high cutting speeds, where thermal effects were thought to be operative. At speeds below approximately 400 sfm, the coarser sintered diamond product was superior. The wear rate of a diamond compact tested on Texas Pink granite was calculated and found to be almost two orders of magnitude greater than the wear rate of the same product as determined by CR and D. The higher wear rate is thought to be the result of cyclic impact loading and thermal effects at the cutter-rock interface. Test results are also discussed for interrupted cuts with high negative back rake angles which generated cracks in diamond compacts. Preliminary bit design concepts were developed, including various options dependent upon compact attachment techniques, bit body materials, and available technology for actual construction. Diamond compact attachment is discussed in the Appendix of this report.

      Hibbs, L.E. Jr.; Flom, D.G.

      1976-12-31T23:59:59.000Z

      452

      Argonne CNM News: Ani Sumant Garners Two R&D100 Awards  

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

      Ani Sumant Garners Two R&D100 Awards Ani Sumant Garners Two R&D100 Awards Ani Sumant Nanocrystalline diamond-related (NCD) devices developed by Anirudha Sumant of the Nanofabrication & Devices Group garnered two of the 2013 R&D 100 awards. Nicknamed the "Oscars of Innovation," the awards recognize a year's most important scientific and technological breakthroughs. The winners include the Miraj Diamond(tm) platform, a manufacturing process developed with AKHAN Technologies, Inc., and the Nanocrystalline Diamond Technologies NCD Plus coating, developed with NCD Technologies. With these awards, Sumant becomes the first Argonne scientist to win two R&D 100 awards in the same year. The Miraj Diamond(tm) platform resulted from the marriage of two scientific breakthroughs: the ability to deposit nanocrystalline diamond films at relatively low temperatures and a doping process that makes NCD into a good semiconducting material. Sumant and his colleagues developed the low-temperature NCD deposition technology at Argonne's Center for Nanoscale Materials, while the doping technique was developed at AKHAN Technologies, an industry partner based in Illinois. These technologies together will allow manufacturers to create better integrated circuits for telecommunications, defense and aviation electronics.

      453

      Geometry and material choices govern hard-rock drilling performance of PDC drag cutters.  

      Science Conference Proceedings (OSTI)

      Sandia National Laboratories has partnered with industry on a multifaceted, baseline experimental study that supports the development of improved drag cutters for advanced drill bits. Different nonstandard cutter lots were produced and subjected to laboratory tests that evaluated the influence of selected design and processing parameters on cutter loads, wear, and durability pertinent to the penetration of hard rock with mechanical properties representative of formations encountered in geothermal or deep oil/gas drilling environments. The focus was on cutters incorporating ultrahard PDC (polycrystalline diamond compact) overlays (i.e., diamond tables) on tungsten-carbide substrates. Parameter variations included changes in cutter geometry, material composition, and processing conditions. Geometric variables were the diamond-table thickness, the cutting-edge profile, and the PDC/substrate interface configuration. Material and processing variables for the diamond table were, respectively, the diamond particle size and the sintering pressure applied during cutter fabrication. Complementary drop-impact, granite-log abrasion, linear cutting-force, and rotary-drilling tests examined the response of cutters from each lot. Substantial changes in behavior were observed from lot to lot, allowing the identification of features contributing major (factor of 10+) improvements in cutting performance for hard-rock applications. Recent field demonstrations highlight the advantages of employing enhanced cutter technology during challenging drilling operations.

      Wise, Jack LeRoy

      2005-06-01T23:59:59.000Z

      454

      Springtime and Sparkling Films | U.S. DOE Office of Science (SC)  

      Office of Science (SC) Website

      2 » Springtime 2 » Springtime and Sparkling Films News Featured Articles 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 Science Headlines Presentations & Testimony News Archives Contact Information Office of Science U.S. Department of Energy 1000 Independence Ave., SW Washington, DC 20585 P: (202) 586-5430 04.16.12 Springtime and Sparkling Films Diamond deposition technique invented at Argonne Lab could improve the performance of electronic devices. Print Text Size: A A A Subscribe FeedbackShare Page Click to enlarge photo. Enlarge Photo Cascading diamonds Shutterstock Spring puts a sparkle in the air. That could be why diamond is April's birthstone. Researchers at the Office of Science's Argonne National Laboratory recently devised a way to use that birthstone to brighten the performance of

      455

      Holographic Theory of Accelerated Observers, the S-matrix, and the Emergence of Effective Field Theory  

      E-Print Network (OSTI)

      We present a theory of accelerated observers in the formalism of holographic space time, and show how to define the analog of the Unruh effect for a one parameter set of accelerated observers in a causal diamond in Minkowski space. The key fact is that the formalism splits the degrees of freedom in a large causal diamond into particles and excitations on the horizon. The latter form a large heat bath for the particles, and different Hamiltonians, describing a one parameter family of accelerated trajectories, have different couplings to the bath. We argue that for a large but finite causal diamond the Hamiltonian describing a geodesic observer has a residual coupling to the bath and that the effect of the bath is finite over the long time interval in the diamond. We find general forms of the Hamiltonian, which guarantee that the horizon degrees of freedom will decouple in the limit of large diamonds, leaving over a unitary evolution operator for particles, with an asymptotically conserved energy. That operator converges to the S-matrix in the infinite diamond limit. The S-matrix thus arises from integrating out the horizon degrees of freedom, in a manner reminiscent of, but distinct from, Matrix Theory. We note that this model for the S-matrix implies that Quantum Gravity, as opposed to quantum field theory, has a natural adiabatic switching off of the interactions. We argue that imposing Lorentz invariance on the S-matrix is natural, and guarantees super-Poincare invariance in the HST formalism. Spatial translation invariance is seen to be the residuum of the consistency conditions of HST.

      Tom Banks; Willy Fischler

      2013-01-24T23:59:59.000Z

      456

      FY 2004 Annual Progress Report for Heavy Vehicle Systems Optimization  

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

      HEAVY HEAVY VEHICLE SYSTEMS OPTIMIZATION FreedomCAR and Vehicle Technologies Program U.S. Department of Energy FreedomCAR and Vehicle Technologies Program 1000 Independence Avenue, S.W. Washington, D.C. 20585-0121 FY 2004 Annual Progress Report for Heavy Vehicle Systems Optimization Energy Efficiency and Renewable Energy FreedomCAR and Vehicle Technologies Program Approved by Dr. Sidney Diamond Technology Area Development Specialist February 2005 Heavy Vehicle Systems Optimization Program FY 2004 Annual Report iii Contents Foreword by Dr. Sidney Diamond, FreedomCAR and Vehicle Technologies Program, Energy Efficiency and Renewable Energy, U.S. Department of Energy ................................. 1 I. Aerodynamic Drag Reduction......................................................................................................

      457

      Low-cost method for producing extreme ultraviolet lithography optics  

      DOE Patents (OSTI)

      Spherical and non-spherical optical elements produced by standard optical figuring and polishing techniques are extremely expensive. Such surfaces can be cheaply produced by diamond turning; however, the roughness in the diamond turned surface prevent their use for EUV lithography. These ripples are smoothed with a coating of polyimide before applying a 60 period Mo/Si multilayer to reflect a wavelength of 134 .ANG. and have obtained peak reflectivities close to 63%. The savings in cost are about a factor of 100.

      Folta, James A. (Livermore, CA); Montcalm, Claude (Fort Collins, CO); Taylor, John S. (Livermore, CA); Spiller, Eberhard A. (Mt. Kisco, NY)

      2003-11-21T23:59:59.000Z

      458

      Ultra low friction carbon/carbon composites for extreme temperature applications  

      DOE Patents (OSTI)

      A carbon/carbon composite in which a carbon matrix containing a controlled amount of boron or a boron compound is reinforced with carbon fiber exhibits a low coefficient of friction, i.e., on the order of 0.04 to 0.1 at temperatures up to 600.degree. C., which is one of the lowest frictional coefficients for any type of carbonaceous material, including graphite, glassy carbon, diamond, diamond-like carbon and other forms of carbon material. The high degree of slipperiness of the carbon composite renders it particularly adapted for limiting friction and wear at elevated temperatures such as in seals, bearings, shafts, and flexible joints

      Erdemir, Ali (Naperville, IL); Busch, Donald E. (Hinsdale, IL); Fenske, George R. (Downers Grove, IL); Lee, Sam (Gardena, CA); Shepherd, Gary (Los Alamitos, CA); Pruett, Gary J. (Cypress, CA)

      2001-01-01T23:59:59.000Z

      459

      Rotor-router aggregation on the layered square lattice  

      E-Print Network (OSTI)

      In rotor-router aggregation on the square lattice Z^2, particles starting at the origin perform deterministic analogues of random walks until reaching an unoccupied site. The limiting shape of the cluster of occupied sites is a disk. We consider a small change to the routing mechanism for sites on the x- and y-axes, resulting in a limiting shape which is a diamond instead of a disk. We show that for a certain choice of initial rotors, the occupied cluster grows as a perfect diamond.

      Kager, Wouter

      2010-01-01T23:59:59.000Z

      460

      Rise time measurement for ultrafast X-ray pulses  

      Science Conference Proceedings (OSTI)

      A pump-probe scheme measures the rise time of ultrafast x-ray pulses. Conventional high speed x-ray diagnostics (x-ray streak cameras, PIN diodes, diamond PCD devices) do not provide sufficient time resolution to resolve rise times of x-ray pulses on the order of 50 fs or less as they are being produced by modern fast x-ray sources. Here, we are describing a pump-probe technique that can be employed to measure events where detector resolution is insufficient to resolve the event. The scheme utilizes a diamond plate as an x-ray transducer and a p-polarized probe beam.

      Celliers, Peter M. (Berkeley, CA); Weber, Franz A. (Oakland, CA); Moon, Stephen J. (Tracy, CA)

      2005-04-05T23:59:59.000Z

      Note: This page contains sample records for the topic "ultramar diamond shamrock" 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.


      461

      Carbon-containing cathodes for enhanced electron emission  

      DOE Patents (OSTI)

      A cathode has electropositive atoms directly bonded to a carbon-containing substrate. Preferably, the substrate comprises diamond or diamond-like (sp.sup.3) carbon, and the electropositive atoms are Cs. The cathode displays superior efficiency and durability. In one embodiment, the cathode has a negative electron affinity (NEA). The cathode can be used for field emission, thermionic emission, or photoemission. Upon exposure to air or oxygen, the cathode performance can be restored by annealing or other methods. Applications include detectors, electron multipliers, sensors, imaging systems, and displays, particularly flat panel displays.

      Cao, Renyu (Cupertino, CA); Pan, Lawrence (Pleasanton, CA); Vergara, German (Madrid, ES); Fox, Ciaran (Los Altos, CA)

      2000-01-01T23:59:59.000Z

      462

      Rise Time Measurement for Ultrafast X-Ray Pulses  

      DOE Patents (OSTI)

      A pump-probe scheme measures the rise time of ultrafast x-ray pulses. Conventional high speed x-ray diagnostics (x-ray streak cameras, PIN diodes, diamond PCD devices) do not provide sufficient time resolution to resolve rise times of x-ray pulses on the order of 50 fs or less as they are being produced by modern fast x-ray sources. Here, we are describing a pump-probe technique that can be employed to measure events where detector resolution is insufficient to resolve the event. The scheme utilizes a diamond plate as an x-ray transducer and a p-polarized probe beam.

      Celliers, Peter M.; Weber, Franz A.; Moon, Stephen J.

      2005-04-05T23:59:59.000Z

      463

      FABRICATION OF WINDOW SADDLES FOR NIF CRYOGENIC HOHLRAUMS  

      Science Conference Proceedings (OSTI)

      OAK-B135 A planar diagnostic viewing port attached to the cylindrical wall of the NIF cryogenic hohlraum requires a saddle-like transition piece. While the basic design of this window saddle is straightforward, its fabrication is not, given the scale and precision of the component. They solved the problem through the use of a two segment copper mandrel to electroform the gold window saddle. The segments were micro-machined using a combination of single-point diamond turning and single point diamond milling. These processes as well as the electroplating conditions, final machining and mandrel removal are described in this paper.

      GIRALDEZ,E; KAAE,J.L

      2003-06-01T23:59:59.000Z

      464

      Optical measurements on hydrogen at ultrahigh static pressures. Summary report for NRIP W233  

      DOE Green Energy (OSTI)

      The results of a two-year New Research Initiatives Program (NRIP) aimed at developing apparatus and techniques for studying hydrogen and other gases under ultrahigh static pressure in diamond--anvil cells are summarized. The following goals were achieved: A facility was established in which precision optical measurements can be made; special diamond cells for use at low temperatures were built; procedures were devised for loading cells with gases at high density; preliminary visual, x-ray, and spectral studies on various gases at pressures up to 50 kbar were conducted; and having demonstrated the feasibility of NRIP, other sponsorship on a continuing basis was obtained.

      Mills, R.L.; Liebenberg, D.H.

      1979-02-01T23:59:59.000Z

      465

      Detection and Control of Individual Nuclear Spins Using a Weakly Coupled Electron Spin  

      Science Conference Proceedings (OSTI)

      We experimentally isolate, characterize, and coherently control up to six individual nuclear spins that are weakly coupled to an electron spin in diamond. Our method employs multipulse sequences on the electron spin that resonantly amplify the interaction with a selected nuclear spin and at the same time dynamically suppress decoherence caused by the rest of the spin bath. We are able to address nuclear spins with interaction strengths that are an order of magnitude smaller than the electron spin dephasing rate. Our results provide a route towards tomography with single-nuclear-spin sensitivity and greatly extend the number of available quantum bits for quantum information processing in diamond.

      Taminiau, T.H.; Wagenaar, J.J.T.; van der Sar, T.; Jelezko, F.; Dobrovitski, Viatcheslav V.; Hanson, R.

      2012-09-28T23:59:59.000Z

      466

      Contents  

      E-Print Network (OSTI)

      This Working Paper should not be reported as representing the views of the IMF. The views expressed in this Working Paper are those of the author(s) and do not necessarily represent those of the IMF or IMF policy. Working Papers describe research in progress by the author(s) and are published to elicit comments and to further debate. This study assesses the sustainability of Botswanas diamond-related fiscal revenue. Diamond reserves are not adequate to generate enough permanent revenue to sustain a high level of expenditure. Under the current fiscal rule that no debt may be accumulated,

      Olivier Basdevant; International Monetary; Fund Wp; Prepared Olivier Basdevant

      2008-01-01T23:59:59.000Z

      467

      Mechanical scriber for semiconductor devices  

      DOE Patents (OSTI)

      A mechanical scriber using a scribing tip, such as a diamond, provides controlled scriber forces with a spring-loaded compound lever arrangement. The scribing force and range of scribing depth are adjusted by a pair of adjustable micrometer heads. A semiconductor device, such as a multilayer solar cell, can be formed into scribed strips at each layer. 5 figs.

      Lin, P.T.

      1985-03-05T23:59:59.000Z

      468

      Ceramic-bonded abrasive grinding tools  

      DOE Patents (OSTI)

      Abrasive grains such as boron carbide, silicon carbide, alumina, diamond, cubic boron nitride, and mullite are combined with a cement primarily comprised of zinc oxide and a reactive liquid setting agent and solidified into abrasive grinding tools. Such grinding tools are particularly suitable for grinding and polishing stone, such as marble and granite.

      Holcombe, Jr., Cressie E. (Farragut, TN); Gorin, Andrew H. (Knoxville, TN); Seals, Roland D. (Oak Ridge, TN)

      1994-01-01T23:59:59.000Z

      469

      Geothermal district heating systems  

      DOE Green Energy (OSTI)

      Ten district heating demonstration projects and their present status are described. The projects are Klamath County YMCA, Susanville District Heating, Klamath Falls District Heating, Reno Salem Plaza Condominium, El Centro Community Center Heating/Cooling, Haakon School and Business District Heating, St. Mary's Hospital, Diamond Ring Ranch, Pagosa Springs District Heating, and Boise District Heating.

      Budney, G.S.; Childs, F.

      1982-01-01T23:59:59.000Z

      470

      Evaluating the Energy Performance of the First Generation of LEED-Certified Commercial Buildings  

      E-Print Network (OSTI)

      Evaluating the Energy Performance of the First Generation of LEED-Certified Commercial Buildings Rick Diamond, Lawrence Berkeley National Laboratory Mike Opitz and Tom Hicks, U.S. Green Building ABSTRACT Over three hundred buildings have been certified under the Leadership in Energy and Environmental

      Diamond, Richard

      471

      May 28, 2009 Smart Buildings  

      E-Print Network (OSTI)

      May 28, 2009 Smart Buildings: Business Case and Action Plan Paul Ehrlich1 and Rick Diamond2 1 Building Intelligence Group St. Paul, MN 2 Environmental Energy Technologies Division Indoor Environment of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231. #12;Smart Buildings: Business Case

      Diamond, Richard

      472

      BandelierDirections2011  

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

      g h c a n y o n Bradbury Science Museum 1 From CENTRAL AVE., turn south at light on 15th STREET 2 Turn RIGHT at light on TRINITY DRIVE - go 1.1 miles 3 Turn LEFT on DIAMOND DRIVE...

      473

      Explore, interact, debate and experience science at over 100  

      E-Print Network (OSTI)

      on the street across the central Oxford shopping area. Which molecule do you think is the most important? Carbon's University, Siemens, Sharp, Medical Research Council, Begbroke Science Park, Oxford Philmusica, Culham Centre, Make it Molecular and Diamond Light Source. For more information visit www

      474

      Nonlin. Processes Geophys., 15, 803813, 2008 www.nonlin-processes-geophys.net/15/803/2008/  

      E-Print Network (OSTI)

      are available to us for three Enercon E-40 (600 kW) wind turbines in Hungary. Two of them (M1 and M2 and timeline of the records. Heavy diamonds indicate the location of three Enercon E-40 wind turbines M1, M2

      Jánosi, Imre M.

      475

      Ceramic-bonded abrasive grinding tools  

      DOE Patents (OSTI)

      Abrasive grains such as boron carbide, silicon carbide, alumina, diamond, cubic boron nitride, and mullite are combined with a cement primarily comprised of zinc oxide and a reactive liquid setting agent and solidified into abrasive grinding tools. Such grinding tools are particularly suitable for grinding and polishing stone, such as marble and granite.

      Holcombe, C.E. Jr.; Gorin, A.H.; Seals, R.D.

      1994-11-22T23:59:59.000Z

      476

      Theoretical calculations of the primary defects induced by pions and protons in SiC  

      E-Print Network (OSTI)

      In the present work, the bulk degradation of SiC in hadron (pion and proton) fields, in the energy range between 100 MeV and 10 GeV, is characterised theoretically by means of the concentration of primary defects per unit fluence. The results are compared to the similar ones corresponding to diamond, silicon and GaAs.

      Sorina Lazanu; Ionel Lazanu; Emilio Borchi; Mara Bruzzi

      2000-07-06T23:59:59.000Z

      477

      KINETICS AND VOLATILIZATION OF SiC AND SiO2: IMPLICATIONS FOR METAMORPHISM OF UNEQUILIBRATED ORDINARY CHONDRITES; R.A. Mendybaev1,3, J.R. Beckett3, L. Grossman1,2, and E.  

      E-Print Network (OSTI)

      KINETICS AND VOLATILIZATION OF SiC AND SiO2: IMPLICATIONS FOR METAMORPHISM OF UNEQUILIBRATED the possibility of a more direct indicator based on the observation [1, 2] that abundances of diamond and SiC of volatilization experiments to lay the groundwork necessary to understand the processes by which SiC is destroyed

      Grossman, Lawrence

      478

      Spontaneous Emergence of Long-range Shape Hidetsugu Shiozawa,, Anne C. Skeldon, David J. B. Lloyd, Vlad Stolojan,  

      E-Print Network (OSTI)

      as well as synthesis of new materials, including single crystals (silicon, synthetic diamond7), synthetic polymers (e.g. Bakelite, nylon), and nanostructured carbon (carbon fiber, fullerene,8 carbon nanotube9). Helical structures are seen in polymers,10 carbides,11 oxides12­14 and carbons.15,16 All these synthesis

      Lloyd, David

      479

      JOURNAL DE PHYSIQUE IV Colloque C8, supplment au Journal de Physique III, Volume 4, septembre 1994 C8-47  

      E-Print Network (OSTI)

      /matrixinterface strength for a silicon-carbide-fiber-reinforced, titanium-alloy metal-matrix composite was measured.1051/jp4:1994806 #12;JOURNALDE PHYSIQUE IV relation for silicon-carbide-fiber by impacting the end of a fiber extending through a thin specimen with a diamond-tipped projectile at ~2 m

      Paris-Sud XI, Université de

      480

      Spectral and T0-spaces in d-semantics  

      Science Conference Proceedings (OSTI)

      In [6] it is shown that if we interpret modal diamond as the derived set operator of a topological space (the so-called d-semantics), then the modal logic of all topological spaces is wK4--weak K4--which is obtained by adding the weak version ??p ...

      Guram Bezhanishvili; Leo Esakia; David Gabelaia

      2009-09-01T23:59:59.000Z

      Note: This page contains sample records for the topic "ultramar diamond shamrock" 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.


      481

      Harnessing the Bacterial Power of Nanomagnets  

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

      conducted by V.S. Coker, N.D. Telling, R.A.D. Pattrick, C.I. Pearce, J.R. Lloyd, F. Tuna, and R.E.P. Winpenny (University of Manchester, UK); G. van der Laan (Diamond Light...

      482

      S E P T E M B E R 2 0 1 2 Nearly every man who develops an idea works at it up to the point  

      E-Print Network (OSTI)

      - ment Initiative BoR/DOEdu 431,946 13-001 Allouche, Erez Geopolymer Concrete Mix Design, Testing Funding Agency $ Awarded Erez Allouche Geopolymer Concrete Mix Design, Testing & Oversight Dept. of Energy-Diamond Microelectrode Array- Based Detection LBRN/INBRE 250,000 13-012 Allouche, Erez Testing of Geopolymer Binders

      Selmic, Sandra

      483

      ORIGINAL ARTICLE Mitigation of autogenous shrinkage in alkali activated slag  

      E-Print Network (OSTI)

      - ment Initiative BoR/DOEdu 431,946 13-001 Allouche, Erez Geopolymer Concrete Mix Design, Testing Funding Agency $ Awarded Erez Allouche Geopolymer Concrete Mix Design, Testing & Oversight Dept. of Energy-Diamond Microelectrode Array- Based Detection LBRN/INBRE 250,000 13-012 Allouche, Erez Testing of Geopolymer Binders

      Bentz, Dale P.

      484

      Annual Report Swinburne University of Technology  

      E-Print Network (OSTI)

      - ment Initiative BoR/DOEdu 431,946 13-001 Allouche, Erez Geopolymer Concrete Mix Design, Testing Funding Agency $ Awarded Erez Allouche Geopolymer Concrete Mix Design, Testing & Oversight Dept. of Energy-Diamond Microelectrode Array- Based Detection LBRN/INBRE 250,000 13-012 Allouche, Erez Testing of Geopolymer Binders

      Liley, David

      485

      Micro-hotplates for thermal characterisation of structural materials of MEMS  

      Science Conference Proceedings (OSTI)

      Accurate knowledge of mechanical and thermal properties of structural materials used in MEMS is essential for optimum geometric and functional design. The extraction of precise physical properties is rather complicated due to the size effects, the complexity ... Keywords: Diamond, Material properties, Micro-heater, Silicon-nitride, Thermal analysis

      P. Cskvri; P. Frjes; Cs. Dcs; I. Brsony

      2009-09-01T23:59:59.000Z

      486

      Syracuse University PressSyracuse University Press Spring and Summer 2013Spring and Summer 2013  

      E-Print Network (OSTI)

      and for it to extend beyond the baseball diamond to have a transformative impact on where all Amer- icans lived, worked and his strong personal character. The world knows him as the man who crossed base- ball's color line of social progress through his work as a writer. Beyond Home Plate, an anthology of Jackie Robinson

      Mather, Patrick T.

      487

      Analysis and evaluation of processes and equipment in Tasks II and IV of the Low-Cost Solar Array Project. Quarterly report, April-July 1978  

      DOE Green Energy (OSTI)

      The significant economic data for the current production multiblade wafering and inner diameter slicing processes were tabulated and compared to data on the experimental and projected Varian multiblade slurry, STC ID diamond coated blade, Yasunaga multiwire slurry and Crystal Systems fixed abrasive multiwire slicing methods. Cost calculations were performed for current production processes and for 1982 and 1986 projected wafering techniques.

      Goldman, H.; Wolf, M.

      1978-11-01T23:59:59.000Z

      488

      Introduction  

      Science Conference Proceedings (OSTI)

      ...rate DBTT ductile-brittle transition temperature dc direct current diam diameter DIC differential interference contrast dm decimeter DPH diamond pyramid hardness (Vickers hardness) DT dynamic tear (test) DWTT drop-weight tear test e natural log base, 2.71828; electron E energy; modulus of...

      489

      AOCS Laboratory Proficiency Program Award Winners  

      Science Conference Proceedings (OSTI)

      AOCS Laboratory Proficiency Program Award Winners 2012-2013 1 www.aocs.org/lpp Aflatoxin in Almonds- First Place Donna Dean-Zavala Blue Diamond Growers Sacramento, CA 95812-1768 USA Aflatoxin in Corn Meal- First Place Kendrick Al

      490

      JournalJoint Oceanographic Institutions for Deep Earth SamplingJoint Oceanographic Institutions for Deep Earth Sampling Vol. 26 No. 1-2000  

      E-Print Network (OSTI)

      with the Kerguelen hot spot is indicated in light stipple, and lamprophyres as diamonds, as they have appeared) in Sep- tember 1999 to start the systems, check the status, and collect initial data. The initial as well as volcanic output is affected by the changes in the force system at the subduction interface

      491

      Green Materials  

      Science Conference Proceedings (OSTI)

      Mar 6, 2013 ... Incorporation of Granite Waste Diamond Wire in Cementitious Matrices: ... determination method simplex from a stroke cement using standard CP-V, ... its property in building materials manufacture, alumina recovery, etc. ... as well as their changes during heat treatment were studied by XRD, FTIR and XPS.

      492

      Geological formation - drill string dynamic interaction finite-element program (GEODYN). Phase 1. Theoretical description  

      DOE Green Energy (OSTI)

      The Theoretical Description for the GEODYN interactive finite-element computer program is presented. The program is capable of performing the analysis of the three-dimensional transient dynamic response of a Polycrystalline Diamond Compact Bit-Bit Sub arising from the intermittent contact of the bit with the downhole rock formations. The program accommodates nonlinear, time-dependent, loading and boundary conditions.

      Baird, J.A.; Apostal, M.C.; Rotelli, R.L. Jr.; Tinianow, M.A.; Wormley, D.N.

      1984-06-01T23:59:59.000Z

      493

      Phase 1 user instruction manual. A geological formation - drill string dynamic interaction finite element program (GEODYN)  

      DOE Green Energy (OSTI)

      User instructions for the GEODYN Interactive Finite Element Computer Program are presented. The program is capable of performing the analysis of the three-dimensional transient dynamic response of a Polycrystalline Diamond Compact Bit - Bit Sub arising from the intermittent contact of the bit with the downhole rock formations. The program accommodates non-linear, time dependent, loading and boundary conditions.

      Tinianow, M.A.; Rotelli, R.L. Jr.; Baird, J.A.

      1984-06-01T23:59:59.000Z

      494

      SOUTHWEST CATALYSIS 2012 SPRING SYMPOSIUM  

      E-Print Network (OSTI)

      , and hydrogen are activated with energetic sources such as microwaves to generate plasmas, direct current (DC include the hot filament [2] and many types of microwave plasma [3], which typically have *Corresponding is expected to be negligible since the diamond phase of carbon is very stable and gasification of dia- mond

      495

      COLLEGE OF ENGINEERING RESEARCH REPORT  

      E-Print Network (OSTI)

      , and hydrogen are activated with energetic sources such as microwaves to generate plasmas, direct current (DC include the hot filament [2] and many types of microwave plasma [3], which typically have *Corresponding is expected to be negligible since the diamond phase of carbon is very stable and gasification of dia- mond

      Saskatchewan, University of

      496

      National Algal Biofuels Technology Roadmap  

      E-Print Network (OSTI)

      , and hydrogen are activated with energetic sources such as microwaves to generate plasmas, direct current (DC include the hot filament [2] and many types of microwave plasma [3], which typically have *Corresponding is expected to be negligible since the diamond phase of carbon is very stable and gasification of dia- mond

      497

      Nonoxidative Activation of Methane Tushar V. Choudhary,#  

      E-Print Network (OSTI)

      , and hydrogen are activated with energetic sources such as microwaves to generate plasmas, direct current (DC include the hot filament [2] and many types of microwave plasma [3], which typically have *Corresponding is expected to be negligible since the diamond phase of carbon is very stable and gasification of dia- mond

      Goodman, Wayne

      498

      Observation of Ice Crystal Formation in Lower Arctic Atmosphere  

      Science Conference Proceedings (OSTI)

      Clear sky ice crystals or diamond dust displays are observed in polar regions, both remote and populated; when the temperature falls to ?20C and where abundant sources of water vapor are present. In remote areas of the Arctic, these ice crystals ...

      Takeshi Ohtake; Kolf Jayaweera; Ken-Ichi Sakurai

      1982-12-01T23:59:59.000Z

      499

      F i g u r e 1 : In QCD a confining flux tube forms  

      E-Print Network (OSTI)

      V Upgrade of the CEBAF complex at Jefferson Lab in Newport News, Virginia. Figure 3 shows a conceptual by passing a fine electron beam from the CEBAF accelerator though a wafer-thin diamond crystal: At special polarized photons. With the planned photon fluxes of 10 7 /sec and the continuous CEBAF beam, the experiment

      500

      A computational analysis of the vibrational absorption of molecular solids in the teraherz range  

      E-Print Network (OSTI)

      of the allotropes of carbon, graphite and diamond. For a small mo- lecule like water (ice in the crystal form) 15 different polymorphs have been discovered up to now, stable under different conditions of temper- ature and pressure [2]. Solvates, or solvatomorphic...

      Tomerini, Daniele

      2012-07-03T23:59:59.000Z