National Library of Energy BETA

Sample records for tungsten halogen spotlights

  1. Spectral irradiance model for tungsten halogen lamps in 340-850 nm wavelength range

    SciTech Connect (OSTI)

    Ojanen, Maija; Kaerhae, Petri; Ikonen, Erkki

    2010-02-10

    We have developed a physical model for the spectral irradiance of 1 kW tungsten halogen incandescent lamps for the wavelength range 340-850 nm. The model consists of the Planck's radiation law, published values for the emissivity of tungsten, and a residual spectral correction function taking into account unknown factors of the lamp. The correction function was determined by measuring the spectra of a 1000 W, quartz-halogen, tungsten coiled filament (FEL) lamp at different temperatures. The new model was tested with lamps of types FEL and 1000 W, 120 V quartz halogen (DXW). Comparisons with measurements of two national standards laboratories indicate that the model can account for the spectral irradiance values of lamps with an agreement better than 1% throughout the spectral region studied. We further demonstrate that the spectral irradiance of a lamp can be predicted with an expanded uncertainty of 2.6% if the color temperature and illuminance values for the lamp are known with expanded uncertainties of 20 K and 2%, respectively. In addition, it is suggested that the spectral irradiance may be derived from resistance measurements of the filament with lamp on and off.

  2. Student Spotlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Spotlight Mekena McGrew Single-shot, Second Harmonic Generation Frequency Resolved Optical Gating (SHG FROG) system for damage testing. Nick Zobrist Optics inspection algorithms that evaluate the condition of NIF's optics. Maverick Chea Optimization of Ultrathin Films Alexandra Carlson Image Analysis Classification algorithm to automatically classify NIF optics damage sites. Nick Czapla Characterizing Scatter Plate Material

  3. Applications of Cu{sub 2}O octahedral particles on ITO glass in photocatalytic degradation of dye pollutants under a halogen tungsten lamp

    SciTech Connect (OSTI)

    Zhai, Wei; Sun, Fengqiang; Chen, Wei; Zhang, Lihe; Min, Zhilin; Li, Weishan

    2013-11-15

    Graphical abstract: - Highlights: Photocatalytic activity of Cu{sub 2}O octahedral microcrystals on ITO glass was studied. They showed high abilities in degradation of methylene blue in the presence of H{sub 2}O{sub 2}. H{sub 2}O{sub 2} amount could affect the degradation efficiency. Such particles could be easily recycled and still kept high activity. Many dye pollutants and their mixtures could be efficiently degraded. - Abstract: Cu{sub 2}O octahedral microcrystals were prepared on the ITO glass by galvanostatic electrodeposition in CuSO{sub 4} solution with poly(vinylpryrrolidone) as the surfactant. By controlling the electrodeposition time, the microcrystals could be randomly distributed on the ITO glass and separated from each other, resulting in as many as possible (1 1 1) crystalline planes were exposed. Such microcrystals immobilized on ITO glass were employed in photodegradation of dye pollutants in the presence of H{sub 2}O{sub 2} under a 150 W halogen tungsten lamp. The photodegradation of methylene blue was taken as an example to evaluate the photocatalytic activities of the octahedral Cu{sub 2}O microcrystals. Effects of electrodeposition time and H{sub 2}O{sub 2} amount on the degradation efficiency was discussed, giving the optimum conditions and the corresponding degradation mechanism. The catalyst showed high ability in degradation of methylene blue, methyl orange, rhodamine B, eosin B and their mixtures under identical conditions.

  4. Scientists in the Spotlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Scientists in the Spotlight Scientists in the Spotlight WHEN: Dec 12, 2015 11:00 AM - 1:00 PM WHERE: Bradbury Science Museum 1350 Central Ave, Los Alamos, NM 87544, USA CATEGORY: Bradbury INTERNAL: Calendar Login Scientists in the Spotlight Every Second Saturday Event Description MARK YOUR CALENDARS for this special event! Every second Saturday from 11:00 AM to 1:00 PM, the museum features actual scientists and researchers talking to visitors about their favorite STEM (Science, Technology,

  5. Energy efficient alternatives to halogen torchieres

    SciTech Connect (OSTI)

    Siminovitch, M.; Marr, L.; Mitchell, J.; Page, E.

    1997-03-01

    A series of novel energy efficient torchiere systems have been developed using compact fluorescent lamps (CFLs). These systems were studied photometrically and compared with the performance of traditional commercially available tungsten halogen sources. Gonio-photometric data and power assessments indicate that significant lighting energy savings can be obtained by utilizing CFL sources instead of standard tungsten halogen sources. This energy savings is jointly due to the higher source efficacy of the CFLs and the surprisingly poor performance of the imported 300 Watt halogen lamps. Experimental data shows that a 50 to 60 Watt CFL will effectively lumen match a variety of 300 Watt tungsten halogen sources with 5 to 10 times the efficacy. CFL torchieres have additional benefits of higher power quality and cooler lamp operating temperature, making them safer fixtures.

  6. Scientists in the Spotlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Scientists In the Spotlight Scientists in the Spotlight WHEN: Apr 11, 2015 11:00 AM - 1:00 PM WHERE: Bradbury Science Museum 1350 Central Ave, Los Alamos, New Mexico, USA CONTACT: Jessica Privette 505 667-0375 CATEGORY: Bradbury INTERNAL: Calendar Login Scientists in the Spotlight Event Description MARK YOUR CALENDARS for this special event! Every second Saturday from 11:00 AM to 1:00 PM, the museum has scientists on the floor talking to people about their favorite STEM topics. Join us at the

  7. Scientists in the Spotlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Scientists In the Spotlight Scientists in the Spotlight WHEN: Aug 08, 2015 10:00 AM - 12:00 PM WHERE: Bradbury Science Museum, 1350 Central Ave, Los Alamos, USA CONTACT: Jessica Privette 505 667-0375 CATEGORY: Bradbury INTERNAL: Calendar Login Scientists in the Spotlight Event Description MARK YOUR CALENDARS for this special event! Every second Saturday from 11:00 AM to 1:00 PM, the museum has scientists on the floor talking to people about their favorite STEM topics. Join us at the museum every

  8. Scientists in the Spotlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Scientists in the Spotlight Scientists in the Spotlight WHEN: Feb 14, 2015 11:00 AM - 1:00 PM WHERE: Bradbury Science Museum, 1350 Central Ave, Los Alamos, USA CONTACT: Jessica Privette 505 667-0375 CATEGORY: Bradbury INTERNAL: Calendar Login Scientist Spotlight Event Description MARK YOUR CALENDARS for this special event! Every second Saturday from 11:00 AM to 1:00 PM, the museum will have special scientists on the floor talking to people about their favorite STEM topics. The scientists

  9. Scientists in the Spotlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Scientists In the Spotlight Scientists in the Spotlight WHEN: Jul 11, 2015 11:00 AM - 1:00 PM WHERE: Bradbury Science Museum 1350 Central Ave, Los Alamos, NM 87544, USA SPEAKER: Nicole Lloyd-Ronning and Teri Roberts CONTACT: Jessica Privette 505 667-0375 CATEGORY: Bradbury INTERNAL: Calendar Login Scientists in the Spotlight Series Event Description MARK YOUR CALENDARS for this special event! Every second Saturday from 11:00 AM to 1:00 PM, the museum has scientists on the floor talking to people

  10. Scientists in the Spotlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Scientists In the Spotlight Scientists in the Spotlight WHEN: Jun 13, 2015 11:00 AM - 1:00 PM WHERE: Bradbury Science Museum 1350 Central Ave, Los Alamos, USA CONTACT: Jessica Privette 505 667-0375 CATEGORY: Bradbury INTERNAL: Calendar Login Scientists in the Spotlight Event Description MARK YOUR CALENDARS for this special event! Every second Saturday from 11:00 AM to 1:00 PM, the museum has scientists on the floor talking to people about their favorite STEM topics. Join us at the museum every

  11. Scientists in the Spotlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Scientists In the Spotlight Scientists in the Spotlight WHEN: May 09, 2015 11:00 AM - 1:00 PM WHERE: Bradbury Science Museum 1350 Central Ave, Los Alamos, New Mexico, USA SPEAKER: Steven Hayden, Chemist CONTACT: Jessica Privette 505 667-0375 CATEGORY: Bradbury INTERNAL: Calendar Login scientist in the spotlight series Event Description MARK YOUR CALENDARS for this special event! Every second Saturday from 11:00 AM to 1:00 PM, the museum has scientists on the floor talking to people about their

  12. Scientists in the Spotlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Scientists in the Spotlight Scientists in the Spotlight WHEN: Nov 14, 2015 11:00 AM - 1:00 PM WHERE: Bradbury Science Museum 1350 Central Ave, Los Alamos, NM 87544, USA CONTACT: Linda Anderman (505) 665-9196 CATEGORY: Bradbury INTERNAL: Calendar Login Scientists in the Spotlight Event Description MARK YOUR CALENDARS for this special event! Every second Saturday from 11:00 AM to 1:00 PM, the museum features actual scientists and researchers talking to visitors about their favorite STEM topics.

  13. Scientists in the Spotlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Scientists In the Spotlight Scientists in the Spotlight WHEN: Oct 10, 2015 11:00 AM - Feb 12, 2015 1:00 PM WHERE: Bradbury Science Museum 1350 Central Avenue, Los Alamos, New Mexico 87544 USA CONTACT: Jessica Privette 505 667-0375 CATEGORY: Bradbury INTERNAL: Calendar Login Scientists in the Spotlight every Second Saturday Event Description MARK YOUR CALENDARS for this special event! Every second Saturday from 11:00 AM to 1:00 PM, the museum has scientists on the floor talking to people about

  14. Scientists in the Spotlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Scientists In the Spotlight Scientists in the Spotlight WHEN: Sep 12, 2015 11:00 AM - 1:00 PM WHERE: Bradbury Science Museum 1350 Central Avenue, Los Alamos, New Mexico, 87544 USA CONTACT: Jessica Privette 505 667-0375 CATEGORY: Bradbury INTERNAL: Calendar Login Scientists in the Spotlight every Second Saturday Event Description MARK YOUR CALENDARS for this special event! Every second Saturday from 11:00 AM to 1:00 PM, the museum has scientists on the floor talking to people about their favorite

  15. Spotlight: Bryant Roybal

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Spotlight: Bryant Roybal Alumni Link: Opportunities, News and Resources for Former Employees Latest Issue:September 2015 all issues All Issues » submit Spotlight: Bryant Roybal Champion chile and a recipe March 1, 2015 Bryant Roybal and his ingredient Bryant Roybal and his ingredient Contact Linda Anderman Email Champion chile New Mexico's first green chile stew champion, Bryant Roybal, is proud to add first prize at the First Annual Great Bowls of Fire Chili Cookoff on February 14, 2015, to

  16. Spotlight: Jenna Casias

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Spotlight: Jenna Casias Alumni Link: Opportunities, News and Resources for Former Employees Latest Issue:September 2015 all issues All Issues » submit Spotlight: Jenna Casias Working with organizations to bring together other women at the Lab in construction, maintenance and project management so there's not only a support system for those already doing the work, but there's outreach as well. May 1, 2015 Jenna Casias works for the B-61-21's Life Extension Program Group Jenna Casias works for

  17. Scientist in the Spotlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Scientist in the Spotlight Scientist in the Spotlight WHEN: Jan 09, 2016 11:00 AM - 1:00 PM WHERE: Bradbury Science Museum 1350 Central Ave, Los Alamos, NM 87544, USA CONTACT: Linda Anderman (505) 665-9196 CATEGORY: Bradbury INTERNAL: Calendar Login Event Description MARK YOUR CALENDARS for this special event! Every second Saturday from 11 a.m. to 1 p.m., the Museum features actual scientists and researchers talking to visitors about their favorite Science, Technology, Engineering and Math

  18. Scientist in the Spotlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    » Scientist in the Spotlight Scientist in the Spotlight WHEN: Mar 12, 2016 11:00 AM - 1:00 PM WHERE: Bradbury Science Museum 1350 Central Ave, Los Alamos, NM 87544, USA CONTACT: Linda Anderman (505) 665-9196 CATEGORY: Bradbury INTERNAL: Calendar Login Event Description MARK YOUR CALENDARS for this special event. Every second Saturday from 11 a.m. to 1 p.m., the Museum has scientists available to talk to visitors about their exciting topics. Fun for the whole family! Capturing an eggs-plosion

  19. Scientists in the Spotlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Scientists In the Spotlight Scientists in the Spotlight WHEN: Mar 14, 2015 11:00 AM - 1:00 PM WHERE: Bradbury Science Museum 1350 Central Ave, Los Alamos, NM 87544, USA CONTACT: Jessica Privette 505 667-0375 CATEGORY: Bradbury INTERNAL: Calendar Login Celebrating Women in Science Event Description MARK YOUR CALENDARS for this special event! Every second Saturday from 11:00 AM to 1:00 PM, the museum has scientists on the floor talking to people about their favorite STEM topics. Join us at the

  20. Employee Spotlight: Dances of India

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Jobs Career Stories Employee Spotlight Alina Deshpande Alina Deshpande-Dances of India Lab scientist Alina Deshpande teaches classical Indian dance and writes, produces,...

  1. DOE Sustainability SPOtlight | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    DOE Sustainability SPOtlight DOE Sustainability SPOtlight Newsletter highlights the recipients of the U.S. Department of Energy (DOE) Sustainability Performance Office (SPO) 2014 Sustainability Awards. PDF icon DOE SPOtlight - 2014 DOE Sustainability Awards More Documents & Publications Department of Energy 2014 Sustainability Awards Information DOE Sustainability SPOtlight: Special Edition 2013 DOE Sustainability Awards 2015 Strategic Sustainability Performance Plan

  2. Employee Spotlight: Janice Lovato

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Careers, Jobs » Careers Stories » Employee Spotlight » Janice Lovato Janice Lovato-A gift for imagination The Associate Directorate for Nuclear and High Hazard Operations' Janice Lovato has turned her love for nature-watching and story-telling into writing a children's book called Germaine the Beetle. March 10, 2015 Janice Lovato Janice Lovato and her first children's book. "I am always telling stories, whether at bedtime, in the car going somewhere or sitting under a tree in the

  3. Employee Spotlight: Sim Balkey

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Career Jobs» Career Stories» Employee Spotlight» Sim Balkey Sim Balkey-On the way up The "kid who has the goods" has been quite busy lately. Just ahead of the MusicRow review he celebrated the release of his new CD, Messin' Around, with a CD release party in Albuquerque on March 13, and before then he was in the national limelight performing in Nashville on February 24. Balkey Balkey Balkey Balkey Balkey Balkey Balkey Balkey 1 2 3 4 5 6 7 8 "As I walked to the microphone I knew

  4. Scientist Spotlight on February 13

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Scientist Spotlight on February 13 Scientist Spotlight on February 13 WHEN: Feb 13, 2016 11:00 AM - 1:00 PM WHERE: Bradbury Science Museum 1350 Central Ave, Los Alamos, NM 87544, USA CONTACT: Linda Anderman (505) 665-9196 CATEGORY: Bradbury INTERNAL: Calendar Login welding sparks Event Description In this demonstration you will learn to weld with a glue gun! Welding-With a glue gun? Typically when we think of welding (joining two metals together) we think of protective gear and flying sparks or

  5. Spotlights Archive | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Spotlights Archive Spotlights Archive RSS October 13, 2015 Ohio and the Manhattan Project (top) B&T Metals, in Columbus; and (bottom) the Fernald Feed Materials Production Center, near Cincinnati. After a briefing regarding the Manhattan Project, Nobel Laureate Niels Bohr said to physicist Edward Teller, "I told you it couldn't be done without turning the whole country into a factory." Of course, the state of Ohio didn't need to be turned into a factory, since by that October

  6. Employee Spotlights | Argonne National Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Apply for a Job External Applicants Internal Applicants Postdoctoral Applicants Fellowships Students Faculty Programs Why Argonne Your Career Life at Argonne Employee Spotlights Amenities Social Activities Newcomers/International Assistance Benefits Education Community Diversity Directory Argonne National Laboratory About Safety News Careers Education Community Diversity Directory Energy Environment Security User Facilities Science Work with Argonne Careers Apply for a Job External Applicants

  7. Workers' Spotlight Newsletter- Issue 11

    Broader source: Energy.gov [DOE]

    Worker's Spotlight newsletter is a monthly publication that provides information regarding the Energy Employees Occupational Illness Compensation Program and the Former Worker Medical Screening Program. January/February 2014 issue covers audiogram, the American Museum of Science and Energy, and trivia.

  8. Spotlight on Austin, Texas: Best Offer Ever Produces Upgrades...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Upgrades in Record Time Spotlight on Austin, Texas: Best Offer Ever Produces Upgrades in Record Time Spotlight on Austin, Texas: Best Offer Ever Produces Upgrades in Record Time,...

  9. Better Buildings: Workforce, Spotlight on Maine: Contractor Sales...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Workforce, Spotlight on Maine: Contractor Sales Training Boosts Energy Upgrade Conversions Better Buildings: Workforce, Spotlight on Maine: Contractor Sales Training Boosts Energy...

  10. Better Buildings - Spotlight on Portland, Oregon; Financing and...

    Energy Savers [EERE]

    Program Work for Contractors Better Buildings: Financing and Incentives: Spotlight on Maine: Transition to a Sustainable Level of Incentives Spotlight on Maine: Transition to a...

  11. Better Buildings: Workforce: Spotlight on Fayette County, Pennsylvania...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Better Buildings: Workforce: Spotlight on Fayette County, Pennsylvania: Developing the Skills and Tools for Workforce Success. PDF icon Spotlight on Fayette County, Pennsylvania...

  12. Spotlight on Key Program Strategies from the Better Buildings...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Spotlight on Key Program Strategies from the Better Buildings Neighborhood Program, Final Evaluation Volume 6 Spotlight on Key Program Strategies from the Better Buildings Neighborhood ...

  13. Spotlight on Seattle, Washington: Community Partnerships Work...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Making the Program Work for Contractors Better Buildings - Spotlight on Portland, Oregon; Financing and Incetntives: Use Incentives to Get Attention and Encourage Deep Savings

  14. Employee Spotlight: Muge Acik | Argonne National Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    or partnering with Argonne to solve your R&D or production challenges, contact partners@anl.gov. Related People Muge Acik Next article: Employee Spotlight: Peter Friedman...

  15. Employee Spotlight: Dances of India

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Career Jobs» Career Stories» Employee Spotlight» Alina Deshpande Alina Deshpande-Dances of India Lab scientist Alina Deshpande teaches classical Indian dance and writes, produces, directs and choreographs an annual benefit performance in Los Alamos. deshpande deshpande deshpande deshpande deshpande deshpande deshpande 12 3 45 67 "My goal for the Dances of India benefit event is not only to raise money for worthy organizations but to showcase my students." Dances of India Each

  16. Metal halogen electrochemical cell

    DOE Patents [OSTI]

    Bellows, Richard J. (Hampton, NJ); Kantner, Edward (E. Brunswick, NJ)

    1988-08-23

    It has now been discovered that reduction in the coulombic efficiency of metal halogen cells can be minimized if the microporous separator employed in such cells is selected from one which is preferably wet by the aqueous electrolyte and is not wet substantially by the cathodic halogen.

  17. Better Buildings: Financing and Incentives: Spotlight on Michigan:

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Experiment to Find the Right Mix of Incentives | Department of Energy Buildings: Financing and Incentives: Spotlight on Michigan: Experiment to Find the Right Mix of Incentives Better Buildings: Financing and Incentives: Spotlight on Michigan: Experiment to Find the Right Mix of Incentives Better Buildings: Financing and Incentives: Spotlight on Michigan: Experiment to Find the Right Mix of Incentives. PDF icon Spotlight on Michigan More Documents & Publications Spotlight on Michigan:

  18. Spotlight on Maine: Transition to a Sustainable Level of Incentives |

    Energy Savers [EERE]

    Department of Energy Spotlight on Maine: Transition to a Sustainable Level of Incentives Spotlight on Maine: Transition to a Sustainable Level of Incentives PDF icon Spotlight on Maine: Transition to a Sustainable Level of Incentives More Documents & Publications Better Buildings: Financing and Incentives: Spotlight on Maine: Transition to a Sustainable Level of Incentives Better Buildings: Workforce, Spotlight on Maine: Contractor Sales Training Boosts Energy Upgrade Conversions Focus

  19. Employee Spotlight: Jennifer Hogan | Argonne National Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    what it's like to work at Argonne in her Employee Spotlight video. Click the image to play the video. Hogan discusses what it's like to work at Argonne in her Employee...

  20. Employee Spotlight: Peter Friedman | Argonne National Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    (Click image to view larger.) (Click image to view larger.) Employee Spotlight: Peter Friedman By Jo Napolitano * September 25, 2015 Tweet EmailPrint Peter Friedman, 30, is a...

  1. Spotlighting Howard University | Department of Energy

    Energy Savers [EERE]

    Spotlighting Howard University Spotlighting Howard University February 27, 2012 - 2:45pm Addthis Students at Howard University are helping to solve one of the biggest challenges facing renewable energy. | Photo by Jim Pleasant. Students at Howard University are helping to solve one of the biggest challenges facing renewable energy. | Photo by Jim Pleasant. Kate Bannan Communications and Outreach Specialist Students at Washington, D.C.'s Howard University are helping to solve one of the biggest

  2. Spotlight on Rutland County, Vermont: How Local Ties Lead to...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Rutland County, Vermont: How Local Ties Lead to Local Wins Spotlight on Rutland County, Vermont: How Local Ties Lead to Local Wins Spotlight on Rutland County, Vermont: How Local...

  3. Spotlight on Austin, Texas: Let Your Contractor Be Your Guide...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Let Your Contractor Be Your Guide for Big Rewards Spotlight on Austin, Texas: Let Your Contractor Be Your Guide for Big Rewards Spotlight on Austin, Texas: Let Your Contractor Be...

  4. Employee Spotlight: John T. Murphy | Argonne National Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Employee Spotlight: John T. Murphy Share Topic Operations Human Resources Programs Mathematics, computing, & computer science Modeling, simulation, & visualization Security...

  5. Better Buildings: Financing and Incentives: Spotlight on Maine: Transition

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    to a Sustainable Level of Incentives | Department of Energy Buildings: Financing and Incentives: Spotlight on Maine: Transition to a Sustainable Level of Incentives Better Buildings: Financing and Incentives: Spotlight on Maine: Transition to a Sustainable Level of Incentives Better Buildings: Financing and Incentives: Spotlight on Maine: Transition to a Sustainable Level of Incentives PDF icon Spotlight on Maine: Transition to a Sustainable Level of Incentives More Documents &

  6. Spotlight on Michigan: Sweeping the State for Ultimate Success | Department

    Energy Savers [EERE]

    of Energy Michigan: Sweeping the State for Ultimate Success Spotlight on Michigan: Sweeping the State for Ultimate Success Spotlight on Michigan: Sweeping the State for Ultimate Success, as posted on the U.S. Department of Energy's Better Buildings Neighborhood Program website. PDF icon Spotlight on Michigan More Documents & Publications Better Buildings: Financing and Incentives: Spotlight on Michigan: Experiment to Find the Right Mix of Incentives BetterBuildings for Michigan:

  7. Workers' Spotlight Newsletter - Issue 7 | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    May 2013, Issue 7 Workers' Spotlight newsletter is a monthly publication that provides information regarding the Energy Employees Occupational Illness Compensation Program and the Former Worker Medical Screening Program. May 2013 issue covers: WHPP and BTMed Roster Updates Director's Note Staff Trivia WHPP Video Acknowledgement. Calendar PDF icon Workers' Spotlight Newsletter - Issue 7 More Documents & Publications Workers' Spotlight Newsletter - Issue 8 Workers' Spotlight Newsletter - Issue

  8. Spotlight on Key Program Strategies from the Better Buildings Neighborhood

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Program, Final Evaluation Volume 6 | Department of Energy Spotlight on Key Program Strategies from the Better Buildings Neighborhood Program, Final Evaluation Volume 6 Spotlight on Key Program Strategies from the Better Buildings Neighborhood Program, Final Evaluation Volume 6 Final Report: Spotlight on Key Program Strategies from the Better Buildings Neighborhood Program, Final Evaluation Volume 6, American Recovery and Reinvestment Act of 2009, June 2015. PDF icon Spotlight on Key Program

  9. DOE Sustainability SPOtlight: Special Edition 2013 DOE Sustainability

    Office of Environmental Management (EM)

    Awards | Department of Energy DOE Sustainability SPOtlight: Special Edition 2013 DOE Sustainability Awards DOE Sustainability SPOtlight: Special Edition 2013 DOE Sustainability Awards Newsletter highlights the recipients of the U.S. Department of Energy (DOE) Sustainability Performance Office (SPO) 2013 Sustainability Awards. PDF icon 2013_spotlight.pdf More Documents & Publications DOE Sustainability SPOtlight 2015 Strategic Sustainability Performance Plan 2011 U.S. Department of Energy

  10. Halogenated solvent remediation

    DOE Patents [OSTI]

    Sorenson, Jr., Kent S. (Windsor, CO)

    2008-11-11

    Methods for enhancing bioremediation of ground water contaminated with nonaqueous halogenated solvents are disclosed. An illustrative method includes adding an electron donor for microbe-mediated anaerobic reductive dehalogenation of the halogenated solvents, which electron donor enhances mass transfer of the halogenated solvents from residual source areas into the aqueous phase of the ground water. Illustrative electron donors include C.sub.2-C.sub.4 carboxylic acids and hydroxy acids, salts thereof, esters of C.sub.2-C.sub.4 carboxylic acids and hydroxy acids, and mixtures thereof, of which lactic acid, salts of lactic acid--such as sodium lactate, lactate esters, and mixtures thereof are particularly illustrative. The microbes are either indigenous to the ground water, or such microbes can be added to the ground water in addition to the electron donor.

  11. Halogenated solvent remediation

    DOE Patents [OSTI]

    Sorenson, Kent S.

    2004-08-31

    Methods for enhancing bioremediation of ground water contaminated with nonaqueous halogenated solvents are disclosed. A preferred method includes adding a composition to the ground water wherein the composition is an electron donor for microbe-mediated reductive dehalogenation of the halogenated solvents and enhances mass transfer of the halogenated solvents from residual source areas into the aqueous phase of the ground water. Illustrative compositions effective in these methods include surfactants such as C.sub.2 -C.sub.4 carboxylic acids and hydroxy acids, salts thereof, esters of C.sub.2 -C.sub.4 carboxylic acids and hydroxy acids, and mixtures thereof. Especially preferred compositions for use in these methods include lactic acid, salts of lactic acid, such as sodium lactate, lactate esters, and mixtures thereof. The microbes are either indigenous to the ground water, or such microbes can be added to the ground water in addition to the composition.

  12. Workers' Spotlight Newsletter - Issue 3 | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    January 2013, Issue 12 Workers' Spotlight newsletter is a monthly publication that provides information regarding the Energy Employees Occupational Illness Compensation Program and the Former Worker Medical Screening Program. January 2013 issue covers: Director's Note National Supplemental Screening Program (NSSP) Staff What's going on Trivia Calendar PDF icon Workers' Spotlight Newsletter - Issue 3 More Documents & Publications Workers' Spotlight Newsletter - Issue 2

  13. Halogenation of cobalt dicarbollide

    DOE Patents [OSTI]

    Hurlburt, P.K.; Abney, K.D.; Kinkead, S.A.

    1997-05-20

    A method for selectively adding chlorine, bromine, or iodine to cobalt dicarbollide anions by means of electrophilic substitution reactions. Halogens are added only to the B10 and B10{prime} positions of the anion. The process involves use of hypohalous acid or N-halosuccinimide or gaseous chlorine in the presence of iron. 1 fig.

  14. Halogenation of cobalt dicarbollide

    DOE Patents [OSTI]

    Hurlburt, Paul K. (Los Alamos, NM); Abney, Kent D. (Los Alamos, NM); Kinkead, Scott A. (Los Alamos, NM)

    1997-01-01

    A method for selectively adding chlorine, bromine, or iodine to cobalt dicarbollide anions by means of electrophilic substitution reactions. Halogens are added only to the B10 and B10' positions of the anion. The process involves use of hypohalous acid or N-halosuccinimide or gaseous chlorine in the presence of iron.

  15. Better Buildings - Spotlight on Portland, Oregon; Financing and

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Incetntives: Use Incentives to Get Attention and Encourage Deep Savings | Department of Energy - Spotlight on Portland, Oregon; Financing and Incetntives: Use Incentives to Get Attention and Encourage Deep Savings Better Buildings - Spotlight on Portland, Oregon; Financing and Incetntives: Use Incentives to Get Attention and Encourage Deep Savings Better Buildings - Spotlight on Portland, Oregon; Financing and Incentives: Use Incentives to Get Attention and Encourage Deep Savings. PDF icon

  16. White House Spotlights Solar Innovation as Summit Registration Continues |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy White House Spotlights Solar Innovation as Summit Registration Continues White House Spotlights Solar Innovation as Summit Registration Continues April 23, 2014 - 10:38am Addthis In case you missed it, last Thursday's White House Solar Champions of Change and Solar Summit shed a spotlight on all the amazing work that solar innovators around country are doing to speed deployment and make it faster, cheaper and easier to go solar! The progress made over the last three

  17. Workers' Spotlight Newsletter - Issue 14 | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    4 Workers' Spotlight Newsletter - Issue 14 July/August/September 2014, Issue 14 Workers' Spotlight newsletter is a monthly publication that provides information regarding the Energy Employees Occupational Illness Compensation Program and the Former Worker Medical Screening Program. July/August/September issue covers: Director's Note 2014 Sylvia Kieding Award National Atomic Testing Museum Calendar of Events PDF icon Workers' Spotlight Newsletter - Issue 14 More Documents & Publications

  18. Better Buildings - Spotlight on Portland, Oregon; Financing and

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Incetntives: Use Incentives to Get Attention and Encourage Deep Savings | Department of Energy Better Buildings - Spotlight on Portland, Oregon; Financing and Incetntives: Use Incentives to Get Attention and Encourage Deep Savings Better Buildings - Spotlight on Portland, Oregon; Financing and Incetntives: Use Incentives to Get Attention and Encourage Deep Savings Better Buildings - Spotlight on Portland, Oregon; Financing and Incentives: Use Incentives to Get Attention and Encourage Deep

  19. Spotlight on Seattle, Washington: Community Partnerships Work to Extend

    Energy Savers [EERE]

    Program Reach | Department of Energy Seattle, Washington: Community Partnerships Work to Extend Program Reach Spotlight on Seattle, Washington: Community Partnerships Work to Extend Program Reach Spotlight on Seattle, Washington: Community Partnerships Work to Extend Program Reach, as posted on the U.S. Department of Energy's Better Buildings Neighborhood Program website. PDF icon Spotlight on Seattle, Washington More Documents & Publications Seattle Summary of Reported Data Better

  20. High Performance Builder Spotlight: Green Coast Enterprises - New Orleans,

    Energy Savers [EERE]

    Louisiana | Department of Energy High Performance Builder Spotlight: Green Coast Enterprises - New Orleans, Louisiana High Performance Builder Spotlight: Green Coast Enterprises - New Orleans, Louisiana This four-page case study describes Green Coast Enterprises efforts to rebuild hurricane-ravaged New Orleans through Project Home Again. PDF icon green_coast_enterprises.pdf More Documents & Publications High Performance Builder Spotlight: Green Coast Enterprises - New Orleans, Louisiana

  1. Workers' Spotlight Newsletter - Issue 13 | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    May/June 2014, Issue 13 Workers' Spotlight newsletter is a monthly publication that provides information regarding the Energy Employees Occupational Illness Compensation Program and the Former Worker Medical Screening Program. May/June issue covers: Director's Note Cold War Patriot's Remembrance Quilt National Museum of Nuclear Science and History Chest X-ray B-reading Calendar of Events PDF icon Workers' Spotlight Newsletter - Issue 13 More Documents & Publications Workers' Spotlight

  2. Workers' Spotlight Newsletter - Issue 4 | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    February 2013, Issue 4 Workers' Spotlight newsletter is a monthly publication that provides information regarding the Energy Employees Occupational Illness Compensation Program and the Former Worker Medical Screening Program. February 2013 issue covers: Director's Note What's Going on around the Complex John Hopkins University Former Worker Program Trivia Staff Calendar PDF icon Workers' Spotlight Newsletter - Issue 4 More Documents & Publications Workers' Spotlight Newsletter - Issue 9

  3. Workers' Spotlight Newsletter - Issue 5 | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    March 2013, Issue 12 Workers' Spotlight newsletter is a monthly publication that provides information regarding the Energy Employees Occupational Illness Compensation Program and the Former Worker Medical Screening Program. May 2013 issue covers: Former Worker Medical Screening Program 2012 Annual Report Staff Trivia University of Iowa - Former Worker Program Calendar PDF icon Workers' Spotlight Newsletter - Issue 5 More Documents & Publications Workers' Spotlight Newsletter - Issue 9

  4. Workers' Spotlight Newsletter - Issue 6 | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    April 2013, Issue 6 Workers' Spotlight newsletter is a monthly publication that provides information regarding the Energy Employees Occupational Illness Compensation Program and the Former Worker Medical Screening Program. May 2013 issue covers: BTMed takes aim at COPD, Lung Cancer Director's Note Staff Trivia Pantex Former Worker Medical Surveillance Program. Trivia Calendar PDF icon Workers' Spotlight Newsletter - Issue 6 More Documents & Publications Workers' Spotlight Newsletter - Issue

  5. DOE Sustainability SPOtlight: Special Edition 2013 DOE Sustainability...

    Broader source: Energy.gov (indexed) [DOE]

    Newsletter highlights the recipients of the U.S. Department of Energy (DOE) Sustainability Performance Office (SPO) 2013 Sustainability Awards. PDF icon 2013spotlight.pdf More ...

  6. Better Buildings: Financing and Incentives: Spotlight on Michigan...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Michigan: Experiment to Find the Right Mix of Incentives Better Buildings: Financing and Incentives: Spotlight on Michigan: Experiment to Find the Right Mix of Incentives Better...

  7. Better Buildings: Workforce: Spotlight on Portland, Oregon: Making...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Better Buildings - Spotlight on Portland, Oregon; Financing and Incetntives: Use Incentives to Get Attention and Encourage Deep Savings Portland Summary of Reported Data Voluntary ...

  8. Spotlight on Austin, Texas: Best Offer Ever Produces 564 Upgrades...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Record Time Spotlight on Austin, Texas: Best Offer Ever Produces 564 Upgrades in Record Time This Better Buildings case study from April 2011 focuses on grantee partner Austin....

  9. Better Buildings: Financing and Incentives: Spotlight on Maine...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Maine: Transition to a Sustainable Level of Incentives Better Buildings: Financing and Incentives: Spotlight on Maine: Transition to a Sustainable Level of Incentives Better...

  10. Workers' Spotlight Newsletter - Issue 2 | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    January 2013 issue covers: Director's Note Site Exposure Matrics (SEM) Advisory Board Calendar PDF icon Workers' Spotlight Newsletter - Issue 2 More Documents & Publications ...

  11. In The Spotlight | National Nuclear Security Administration

    National Nuclear Security Administration (NNSA)

    The Spotlight | National Nuclear Security Administration Facebook Twitter Youtube Flickr RSS People Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Countering Nuclear Terrorism About Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Library Bios Congressional Testimony Fact Sheets Newsletters Press Releases Photo Gallery Jobs Apply for Our Jobs Our Jobs Working at NNSA Blog

  12. Better Buildings: Workforce, Spotlight on Maine: Contractor Sales Training Boosts Energy Upgrade Conversions

    Broader source: Energy.gov [DOE]

    Better Buildings: Workforce, Spotlight on Maine: Contractor Sales Training Boosts Energy Upgrade Conversions.

  13. Better Buildings: Workforce: Spotlight on Portland, Oregon: Making the Program Work for Contractors

    Broader source: Energy.gov [DOE]

    Better Buildings: Workforce: Spotlight on Portland, Oregon: Making the Program Work for Contractors.

  14. Better Buildings: Workforce: Spotlight on Fayette County, Pennsylvania: Developing the Skills and Tools for Workforce Success

    Broader source: Energy.gov [DOE]

    Better Buildings: Workforce: Spotlight on Fayette County, Pennsylvania: Developing the Skills and Tools for Workforce Success

  15. Spotlight on Austin, Texas: Best Offer Ever Produces Upgrades in Record

    Energy Savers [EERE]

    Time | Department of Energy Best Offer Ever Produces Upgrades in Record Time Spotlight on Austin, Texas: Best Offer Ever Produces Upgrades in Record Time Spotlight on Austin, Texas: Best Offer Ever Produces Upgrades in Record Time, as posted on the U.S. Department of Energy's Better Buildings Neighborhood Program website. PDF icon Spotlight on Austin, Texas More Documents & Publications Spotlight on Austin, Texas: Best Offer Ever Produces 564 Upgrades in Record Time Spotlight on Austin,

  16. Spotlight on Austin, Texas: Let Your Contractor Be Your Guide for Big

    Energy Savers [EERE]

    Rewards | Department of Energy Let Your Contractor Be Your Guide for Big Rewards Spotlight on Austin, Texas: Let Your Contractor Be Your Guide for Big Rewards Spotlight on Austin, Texas: Let Your Contractor Be Your Guide for Big Rewards, as posted on the U.S. Department of Energy's Better Buildings Neighborhood Program website. PDF icon Spotlight on Austin, Texas More Documents & Publications Spotlight on Austin, Texas: Best Offer Ever Produces Upgrades in Record Time Spotlight on

  17. Spotlight on Austin, Texas: Best Offer Ever Produces 564 Upgrades in Record

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Time | Department of Energy Spotlight on Austin, Texas: Best Offer Ever Produces 564 Upgrades in Record Time Spotlight on Austin, Texas: Best Offer Ever Produces 564 Upgrades in Record Time This Better Buildings case study from April 2011 focuses on grantee partner Austin. PDF icon Spotlight on Austin, Texas More Documents & Publications Spotlight on Austin, Texas: Best Offer Ever Produces Upgrades in Record Time Spotlight on Austin, Texas: Let Your Contractor Be Your Guide for Big

  18. Nuclear Fuels & Materials Spotlight Volume 4

    SciTech Connect (OSTI)

    I. J. van Rooyen,; T. M. Lillo; Y. Q. WU; P.A. Demkowicz; L. Scott; D.M. Scates; E. L. Reber; J. H. Jackson; J. A. Smith; D.L. Cottle; B.H. Rabin; M.R. Tonks; S.B. Biner; Y. Zhang; R.L. Williamson; S.R. Novascone; B.W. Spencer; J.D. Hales; D.R. Gaston; C.J. Permann; D. Anders; S.L. Hayes; P.C. Millett; D. Andersson; C. Stanek; R. Ali; S.L. Garrett; J.E. Daw; J.L. Rempe; J. Palmer; B. Tittmann; B. Reinhardt; G. Kohse; P. Ramuhali; H.T. Chien; T. Unruh; B.M. Chase; D.W. Nigg; G. Imel; J. T. Harris

    2014-04-01

    As the nation's nuclear energy laboratory, Idaho National Laboratory brings together talented people and specialized nuclear research capability to accomplish our mission. This edition of the Nuclear Fuels and Materials Division Spotlight provides an overview of some of our recent accomplishments in research and capability development. These accomplishments include: • The first identification of silver and palladium migrating through the SiC layer in TRISO fuel • A description of irradiation assisted stress corrosion testing capabilities that support commercial light water reactor life extension • Results of high-temperature safety testing on coated particle fuels irradiated in the ATR • New methods for testing the integrity of irradiated plate-type reactor fuel • Description of a 'Smart Fuel' concept that wirelessly provides real time information about changes in nuclear fuel properties and operating conditions • Development and testing of ultrasonic transducers and real-time flux sensors for use inside reactor cores, and • An example of a capsule irradiation test. Throughout Spotlight, you'll find examples of productive partnerships with academia, industry, and government agencies that deliver high-impact outcomes. The work conducted at Idaho National Laboratory helps to spur innovation in nuclear energy applications that drive economic growth and energy security. We appreciate your interest in our work here at INL, and hope that you find this issue informative.

  19. Employee Spotlight: John T. Murphy | Argonne National Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Click the image to watch his Employee Spotlight video. Connect Find an Argonne expert by subject. Follow Argonne on Twitter, Facebook, Google+ and LinkedIn. For inquiries on...

  20. Building America Research Teams: Spotlight on Alliance for Residential

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Building Innovation (ARBI) and Building America Research Alliance (BARA) | Department of Energy Research Teams: Spotlight on Alliance for Residential Building Innovation (ARBI) and Building America Research Alliance (BARA) Building America Research Teams: Spotlight on Alliance for Residential Building Innovation (ARBI) and Building America Research Alliance (BARA) January 14, 2015 - 7:03pm Addthis R&D→Innovation→Partnership→Demonstration→Market Transformation-hallmarks of

  1. Workers' Spotlight Newsletter - Issue 15 | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    5 Workers' Spotlight Newsletter - Issue 15 October/November/December 2014, Issue 15 Workers' Spotlight newsletter is a monthly publication that provides information regarding the Energy Employees Occupational Illness Compensation Program and the Former Worker Medical Screening Program. November/December issue covers: Director's Note National Day of Remembrance Remembrance Quilt JOTG Meeting in Paducah University of Iowa Recognition Events Second Anniversary of Secure Electronic Records Transfer

  2. Building America Research Teams: Spotlight on Home Innovation and PARR |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy Spotlight on Home Innovation and PARR Building America Research Teams: Spotlight on Home Innovation and PARR April 9, 2015 - 10:55am Addthis This article continues our series of profiles about the Building America research teams-multidisciplinary industry partnerships that work to make high performance homes a reality for all Americans. This month's article focuses on Partnership for Home Innovation and Partnership for Advanced Residential Retrofits-leaders in research

  3. Spotlight on Michigan: Sweeping the State for Ultimate Success

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    July 2011 Version 2 betterbuildings.energy.gov/neighborhoods Spotlight on Michigan: Sweeping the State for Ultimate Success Service Delivery The Better Buildings Neighborhood Program is part of the national Better Buildings Initiative led by the U.S. Department of Energy. To learn how the Better Buildings Neighborhood Program is making homes more comfortable and businesses more lucrative and to read more from this Spotlight series, visit betterbuildings.energy.gov/neighborhoods. 1 A Sweeping

  4. ARPA-E Technology Showcase: Project Spotlight | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Technology Showcase: Project Spotlight ARPA-E Technology Showcase: Project Spotlight March 1, 2011 - 1:49pm Addthis William Mouat explains the PolyPlus battery technology. | Energy Department photo, credit Ken Shipp. William Mouat explains the PolyPlus battery technology. | Energy Department photo, credit Ken Shipp. April Saylor April Saylor Former Digital Outreach Strategist, Office of Public Affairs Last night, we had the chance to visit with a few of the researchers and scientists behind the

  5. Workers' Spotlight Newsletter - Issue 10 | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    November/December 2013, Issue 10 Workers' Spotlight newsletter is a monthly publication that provides information regarding the Energy Employees Occupational Illness Compensation Program and the Former Worker medical Screening Program. November/December 2013 issue covers: Director's Note Remembrance Staff Beryllium Trivia Question Secure Electronic Records Transfer (SERT) Former Worker Program Milestone Calendar PDF icon Workers' Spotlight Newsletter - Issue 10 More Documents & Publications

  6. Workers' Spotlight Newsletter - Issue 12 | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    March/April 2014, Issue 12 Workers' Spotlight newsletter is a monthly publication that provides information regarding the Energy Employees Occupational Illness Compensation Program and the Former Worker medical Screening Program. March/April issue covers: Director's Note Joint Outreach Task Group town hall meeting video Bradybury Science Museum Spirometry Staff Trivia Question Calendar of Events PDF icon Workers' Spotlight Newsletter - Issue 12 More Documents & Publications Workers'

  7. Workers' Spotlight Newsletter - Issue 8 | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    July/August 2013, Issue 8 Workers' Spotlight newsletter is a monthly publication that provides information regarding the Energy Employees Occupational Illness Compensation Program and the Former Worker Screening Program. July/August issue covers Site Information Sessions Director's Note Staff Joint Outreach Task Group Meeting - Chicago National Supplemental Screening Program Low-Dose CT Program Calendar PDF icon Workers' Spotlight Newsletter - Issue 8 More Documents & Publications Workers'

  8. Workers' Spotlight Newsletter - Issue 9 | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    September/October 2013, Issue 9 Workers' Spotlight newsletter is a monthly publication that provides information regarding the Energy Employees Occupational Illness Compensation Program and the Former Worker medical Screening Program. September/October 2013 issue covers: Former Worker Medical Screening Program Milestone Director's Note Staff United States Preventive Services Task Force (USPSTF) Trivia John Hopkins Former Worker Program Calendar PDF icon Workers' Spotlight Newsletter -

  9. Washington Auto Show Spotlight: How Fuel Cell Electric Vehicles Work |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy Washington Auto Show Spotlight: How Fuel Cell Electric Vehicles Work Washington Auto Show Spotlight: How Fuel Cell Electric Vehicles Work January 27, 2015 - 12:57pm Addthis The Hyundai Tucson FCEV is currently available for lease in Southern California for less than $500 per month, including free hydrogen fuel. Hydrogen for FCEVs can be produced from a variety of resources all providing emission reductions. Hydrogen derived from natural gas reduces emissions by half and

  10. Determining thermochemical properties of halogenated metals:...

    Office of Scientific and Technical Information (OSTI)

    Technical Report: Determining thermochemical properties of halogenated metals: On enabling the rapid assessment of agent defeat formulations Citation Details In-Document Search...

  11. Spotlight on Rutland County, Vermont: How Local Ties Lead to Local Wins |

    Energy Savers [EERE]

    Department of Energy Rutland County, Vermont: How Local Ties Lead to Local Wins Spotlight on Rutland County, Vermont: How Local Ties Lead to Local Wins Spotlight on Rutland County, Vermont: How Local Ties Lead to Local Wins, as posted on the U.S. Department of Energy's Better Buildings Neighborhood Program website. PDF icon Spotlight on Rutland County, Vermont More Documents & Publications Rutland County Summary of Reported Data Better Buildings -- Concierge Programs for Contractors --

  12. Oct. 29 Webinar to Spotlight DOE Energy Programs for Tribes and...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    and First Tribally Owned Hydroelectric Facility Oct. 29 Webinar to Spotlight DOE Energy Programs for Tribes and First Tribally Owned Hydroelectric Facility October 21, 2014 - ...

  13. #LabSpotlight - People of the National Labs | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    #LabSpotlight - People of the National Labs #LabSpotlight - People of the National Labs #LabSpotlight - People of the National Labs Our #LabSpotlight series profiles standout individuals at the National Labs. From a theoretical physicist working to better understand one of the most elusive particles in the universe to a master optician hand-polishing precision optics used in high-powered lasers, the National Labs are home to some of the most exceptional people in their fields. These are their

  14. Healthcare Energy: Spotlight on Fans and Pumps | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Fans and Pumps Healthcare Energy: Spotlight on Fans and Pumps Chilled water pumps at a central plant. Image by Warren Gretz, NREL/06196 Chilled water pumps at a central plant. Image by Warren Gretz, NREL/06196 The Building Technologies Office conducted a healthcare energy end-use monitoring project in partnership with two hospitals. See below for a few highlights from monitoring fan and pump energy use. Fans At the Massachusetts General Hospital (MGH) Gray Building, supply, return/exhaust, and

  15. Healthcare Energy: Spotlight on Lighting and Other Electric Loads |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy Lighting and Other Electric Loads Healthcare Energy: Spotlight on Lighting and Other Electric Loads Compact fluorescent, light-emitting diode, and energy-saving incandescent light bulbs. | Image by Dennis Schroeder/NREL 19469 Compact fluorescent, light-emitting diode, and energy-saving incandescent light bulbs. | Image by Dennis Schroeder/NREL 19469 The Building Technologies Office conducted a healthcare energy end-use monitoring project in partnership with two

  16. Healthcare Energy: Spotlight on Medical Equipment | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Medical Equipment Healthcare Energy: Spotlight on Medical Equipment The Building Technologies Office conducted a healthcare energy end-use monitoring project in partnership with two hospitals. Additional plug load data from medical office buildings were provided by Mazzetti, Inc. See below for a few highlights from monitoring large medical imaging equipment and medical office building plug loads. Graphic showing the average weekday energy use of a CT machine. Graph showing average weekday energy

  17. Workers' Spotlight Newsletter - Issue 1 | Department of Energy

    Broader source: Energy.gov (indexed) [DOE]

    November 2012, Issue 1 Workers' Spotlight newsletter is a monthly publication that provides information regarding the Energy Employees Occupational Illness Compensation Program and the Former Worker Medical Screening Program. November 2012 issue covers: Director's Note National Day of Remembrance Secure Electronic Records Transfer (SERT) Early Lung Cancer Detection What's Going on Around the Complex (Richland) NIOSH Advisory Board on Radiation and Worker Health Trivia Calendar PDF icon Workers'

  18. Preparation of tungsten oxide

    DOE Patents [OSTI]

    Bulian, Christopher J.; Dye, Robert C.; Son, Steven F.; Jorgensen, Betty S.; Perry, W. Lee

    2009-09-22

    Tungsten trioxide hydrate (WO.sub.3.H.sub.2O) was prepared from a precursor solution of ammonium paratungstate in concentrated aqueous hydrochloric acid. The precursor solution was rapidly added to water, resulting in the crash precipitation of a yellow white powder identified as WO.sub.3.H.sub.2O nanosized platelets by x-ray diffraction and scanning electron microscopy. Annealing of the powder at 200.degree. C. provided cubic phase WO.sub.3 nanopowder, and at 400.degree. C. provided WO.sub.3 nanopowder as a mixture of monoclinic and orthorhombic phases.

  19. Healthcare Energy: Spotlight on Chiller Plants | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Chiller Plants Healthcare Energy: Spotlight on Chiller Plants The Building Technologies Office conducted a healthcare energy end-use monitoring project in partnership with two hospitals. See below for a few highlights from monitoring chiller plant energy. Image of a chiller plant. Chiller Energy Annual site energy use intensities (EUIs) for chiller energy were estimated to be 27.7 kBtu/ft2-yr for the the Massachusetts General Hospital (MGH) Gray Building and 26.8 kBtu/ft2-yr for the State

  20. Method and apparatus for low temperature destruction of halogenated hydrocarbons

    DOE Patents [OSTI]

    Reagen, William Kevin (Stillwater, MN); Janikowski, Stuart Kevin (Idaho Falls, ID)

    1999-01-01

    A method and apparatus for decomposing halogenated hydrocarbons are provided. The halogenated hydrocarbon is mixed with solvating agents and maintained in a predetermined atmosphere and at a predetermined temperature. The mixture is contacted with recyclable reactive material for chemically reacting with the recyclable material to create dehalogenated hydrocarbons and halogenated inorganic compounds. A feature of the invention is that the process enables low temperature destruction of halogenated hydrocarbons.

  1. High strength uranium-tungsten alloys

    DOE Patents [OSTI]

    Dunn, Paul S. (Santa Fe, NM); Sheinberg, Haskell (Los Alamos, NM); Hogan, Billy M. (Los Alamos, NM); Lewis, Homer D. (Bayfield, CO); Dickinson, James M. (Los Alamos, NM)

    1991-01-01

    Alloys of uranium and tungsten and a method for making the alloys. The amount of tungsten present in the alloys is from about 4 wt % to about 35 wt %. Tungsten particles are dispersed throughout the uranium and a small amount of tungsten is dissolved in the uranium.

  2. High strength uranium-tungsten alloy process

    DOE Patents [OSTI]

    Dunn, Paul S. (Santa Fe, NM); Sheinberg, Haskell (Los Alamos, NM); Hogan, Billy M. (Los Alamos, NM); Lewis, Homer D. (Bayfield, CO); Dickinson, James M. (Los Alamos, NM)

    1990-01-01

    Alloys of uranium and tungsten and a method for making the alloys. The amount of tungsten present in the alloys is from about 4 wt % to about 35 wt %. Tungsten particles are dispersed throughout the uranium and a small amount of tungsten is dissolved in the uranium.

  3. Passivation of quartz for halogen-containing light sources

    DOE Patents [OSTI]

    Falkenstein, Zoran (Los Alamos, NM)

    1999-01-01

    Lifetime of halogen containing VUV, UV, visible or IR light sources can be extended by passivating the quartz or glass gas containers with halogens prior to filling the quartz with the halogen and rare gas mixtures used to produce the light.

  4. Retention of Halogens in Waste Glass

    SciTech Connect (OSTI)

    Hrma, Pavel R.

    2010-05-01

    In spite of their potential roles as melting rate accelerators and foam breakers, halogens are generally viewed as troublesome components for glass processing. Of five halogens, F, Cl, Br, I, and At, all but At may occur in nuclear waste. A nuclear waste feed may contain up to 10 g of F, 4 g of Cl, and ?100 mg of Br and I per kg of glass. The main concern is halogen volatility, producing hazardous fumes and particulates, and the radioactive iodine 129 isotope of 1.7x10^7-year half life. Because F and Cl are soluble in oxide glasses and tend to precipitate on cooling, they can be retained in the waste glass in the form of dissolved constituents or as dispersed crystalline inclusions. This report compiles known halogen-retention data in both high-level waste (HLW) and low-activity waste (LAW) glasses. Because of its radioactivity, the main focus is on I. Available data on F and Cl were compiled for comparison. Though Br is present in nuclear wastes, it is usually ignored; no data on Br retention were found.

  5. Operation of thoriated tungsten cathodes

    SciTech Connect (OSTI)

    Polk, J.E. )

    1993-01-20

    The operating temperature of thoriated tungsten cathodes used in electric thrusters depends on the surface coverage of thorium, which is determined by a balance of rate processes which supply and deplete the surface layer. The fundamental processes and rates are first reviewed in detail, then a phenomenological model based on these rate processes is described. The model indicates that the thermionic emission capabilities of thoriated tungsten cathodes decay rapidly because of thorium depletion at temperatures encountered in electric thrusters.

  6. Award Spotlight Could Return to EM-Developed Technology for Tracking

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Shipments | Department of Energy Award Spotlight Could Return to EM-Developed Technology for Tracking Shipments Award Spotlight Could Return to EM-Developed Technology for Tracking Shipments August 27, 2013 - 12:00pm Addthis James Shuler, manager of DOE’s Packaging Certification Program, within EM's Office of Packaging and Transportation, discusses the radiofrequency identification technology he developed. At left is RFID Team Leader Yung Liu, with Argonne National Laboratory. James

  7. The City of Los Angeles Has Its Spotlight on Energy Efficiency | Department

    Energy Savers [EERE]

    of Energy The City of Los Angeles Has Its Spotlight on Energy Efficiency The City of Los Angeles Has Its Spotlight on Energy Efficiency July 30, 2012 - 9:19am Addthis Mayor Antonio Villaraigosa and the Founding Partners of Los Angeles Better Buildings Challenge sign commitments to reduce energy use in their buildings. | Photo courtesy of the City of Los Angeles. Mayor Antonio Villaraigosa and the Founding Partners of Los Angeles Better Buildings Challenge sign commitments to reduce energy

  8. Spotlight on Key Program Strategies from the Better Buildings Neighborhood Program

    Energy Savers [EERE]

    Report Spotlight on Key Program Strategies from the Better Buildings Neighborhood Program Final Evaluation Volume 6 American Recovery and Reinvestment Act of 2009 June 2015 Prepared For: U.S. Department of Energy Office of Energy Efficiency and Renewable Energy DOE/EE-1207 DOE/EE-1207 Final Report Spotlight on Key Program Strategies from the Better Buildings Neighborhood Program Final Evaluation Volume 6 American Recovery and Reinvestment Act of 2009 June 2015 Funded By: Prepared By: Research

  9. Oct. 29 Webinar to Spotlight DOE Energy Programs for Tribes and First

    Energy Savers [EERE]

    Tribally Owned Hydroelectric Facility | Department of Energy Oct. 29 Webinar to Spotlight DOE Energy Programs for Tribes and First Tribally Owned Hydroelectric Facility Oct. 29 Webinar to Spotlight DOE Energy Programs for Tribes and First Tribally Owned Hydroelectric Facility October 21, 2014 - 5:39pm Addthis The U.S. Department of Energy (DOE) Office of Indian Energy, Tribal Energy Program, and Western Area Power Administration (Western) will present the final webinar in the 2014 Tribal

  10. Spotlight on Austin, Texas: Best Offer Ever Produces Upgrades in Record Time

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Spotlight on Austin, Texas: Best Offer Ever Produces Upgrades in Record Time The Better Buildings Neighborhood Program is part of the national Better Buildings Initiative led by the U.S. Department of Energy. To learn how the Better Buildings Neighborhood Program is making homes more comfortable and businesses more lucrative and to read more from this Spotlight series, visit betterbuildings.energy.gov/neighborhoods. 1 Launch With a Short-Term Promotional Offer to Jump-Start Participation With

  11. Spotlight on Rutland County, Vermont: How Local Ties Lead to Local Wins

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    April 2011 Version 2 betterbuildings.energy.gov/neighborhoods Spotlight on Rutland County, Vermont: How Local Ties Lead to Local Wins Driving Demand The Better Buildings Neighborhood Program is part of the national Better Buildings Initiative led by the U.S. Department of Energy. To learn how the Better Buildings Neighborhood Program is making homes more comfortable and businesses more lucrative and to read more from this Spotlight series, visit betterbuildings.energy.gov/neighborhoods.

  12. Building America Research Teams: Spotlight on ARIES and NorthernSTAR |

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Department of Energy Research Teams: Spotlight on ARIES and NorthernSTAR Building America Research Teams: Spotlight on ARIES and NorthernSTAR May 14, 2015 - 12:36pm Addthis This article continues our series of profiles about the Building America research teams-multidisciplinary industry partnerships that work to make high performance homes a reality for all Americans. This month's article focuses on Advanced Residential Integrated Energy Solutions and NorthernSTAR Building America

  13. Home Energy Score Past Webinars and Video Spotlights | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Past Webinars and Video Spotlights Home Energy Score Past Webinars and Video Spotlights Here are past webinars and materials from Home Energy Score. March 4, 2015: Home Energy Score Update: New Simulation Training & Requirements for Assessors In an effort to improve Assessor training and broaden the pool of candidates eligible to score homes, the U.S. Department of Energy (DOE) developed a 3D Simulation training and testing tool to train building professionals on using the Home Energy

  14. EECBG Success Story: The City of Los Angeles Has Its Spotlight on Energy

    Office of Environmental Management (EM)

    Efficiency | Department of Energy The City of Los Angeles Has Its Spotlight on Energy Efficiency EECBG Success Story: The City of Los Angeles Has Its Spotlight on Energy Efficiency July 30, 2012 - 9:19am Addthis Mayor Antonio Villaraigosa and the Founding Partners of Los Angeles Better Buildings Challenge sign commitments to reduce energy use in their buildings. | Photo courtesy of the city of Los Angeles. Mayor Antonio Villaraigosa and the Founding Partners of Los Angeles Better Buildings

  15. Process Of Bonding Copper And Tungsten

    DOE Patents [OSTI]

    Slattery, Kevin T. (St. Charles, MO); Driemeyer, Daniel E. (Manchester, MO); Davis, John W. (Ballwin, MO)

    2000-07-18

    Process for bonding a copper substrate to a tungsten substrate by providing a thin metallic adhesion promoting film bonded to a tungsten substrate and a functionally graded material (FGM) interlayer bonding the thin metallic adhesion promoting film to the copper substrate. The FGM interlayer is formed by sintering a stack of individual copper and tungsten powder blend layers having progressively higher copper content/tungsten content, by volume, ratio values in successive powder blend layers in a lineal direction extending from the tungsten substrate towards the copper substrate. The resulting copper to tungsten joint well accommodates the difference in the coefficient of thermal expansion of the materials.

  16. Method and apparatus for detecting halogenated hydrocarbons

    DOE Patents [OSTI]

    Monagle, Matthew (Los Alamos, NM); Coogan, John J. (Los Alamos, NM)

    1997-01-01

    A halogenated hydrocarbon (HHC) detector is formed from a silent discharge (also called a dielectric barrier discharge) plasma generator. A silent discharge plasma device receives a gas sample that may contain one or more HHCs and produces free radicals and excited electrons for oxidizing the HHCs in the gas sample to produce water, carbon dioxide, and an acid including halogens in the HHCs. A detector is used to sensitively detect the presence of the acid. A conductivity cell detector combines the oxidation products with a solvent where dissociation of the acid increases the conductivity of the solvent. The conductivity cell output signal is then functionally related to the presence of HHCs in the gas sample. Other detectors include electrochemical cells, infrared spectrometers, and negative ion mobility spectrometers.

  17. Oxidation of hydrogen halides to elemental halogens

    DOE Patents [OSTI]

    Rohrmann, Charles A. (Kennewick, WA); Fullam, Harold T. (Richland, WA)

    1985-01-01

    A process for oxidizing hydrogen halides having substantially no sulfur impurities by means of a catalytically active molten salt is disclosed. A mixture of the subject hydrogen halide and an oxygen bearing gas is contacted with a molten salt containing an oxidizing catalyst and alkali metal normal sulfates and pyrosulfates to produce an effluent gas stream rich in the elemental halogen and substantially free of sulfur oxide gases.

  18. Process for removal of hydrogen halides or halogens from incinerator gas

    DOE Patents [OSTI]

    Huang, Hann S. (Darien, IL); Sather, Norman F. (Naperville, IL)

    1988-01-01

    A process for reducing the amount of halogens and halogen acids in high temperature combustion gases and through their removal, the formation of halogenated organics at lower temperatures, with the reduction being carried out electrochemically by contacting the combustion gas with the negative electrode of an electrochemical cell and with the halogen and/or halogen acid being recovered at the positive electrode.

  19. Process for removal of hydrogen halides or halogens from incinerator gas

    DOE Patents [OSTI]

    Huang, H.S.; Sather, N.F.

    1987-08-21

    A process for reducing the amount of halogens and halogen acids in high temperature combustion gas and through their removal, the formation of halogenated organics at lower temperatures, with the reduction being carried out electrochemically by contacting the combustion gas with the negative electrode of an electrochemical cell and with the halogen and/or halogen acid being recovered at the positive electrode.

  20. Method of synthesizing tungsten nanoparticles

    DOE Patents [OSTI]

    Thoma, Steven G; Anderson, Travis M

    2013-02-12

    A method to synthesize tungsten nanoparticles has been developed that enables synthesis of nanometer-scale, monodisperse particles that can be stabilized only by tetrahydrofuran. The method can be used at room temperature, is scalable, and the product concentrated by standard means. Since no additives or stabilizing surfactants are required, this method is particularly well suited for producing tungsten nanoparticles for dispersion in polymers. If complete dispersion is achieved due to the size of the nanoparticles, then the optical properties of the polymer can be largely maintained.

  1. Process Of Bonding Copper And Tungsten

    DOE Patents [OSTI]

    Slattery, Kevin T. (St. Charles, MO); Driemeyer, Daniel E. (Manchester, MO)

    1999-11-23

    Process for bonding a copper substrate to a tungsten substrate by providing a thin metallic adhesion promoting film bonded to a tungsten substrate and a functionally graded material (FGM) interlayer bonding the thin metallic adhesion promoting film to the copper substrate. The FGM interlayer is formed by thermal plasma spraying mixtures of copper powder and tungsten powder in a varied blending ratio such that the blending ratio of the copper powder and the tungsten powder that is fed to a plasma torch is intermittently adjusted to provide progressively higher copper content/tungsten content, by volume, ratio values in the interlayer in a lineal direction extending from the tungsten substrate towards the copper substrate. The resulting copper to tungsten joint well accommodates the difference in the coefficient of thermal expansion of the materials.

  2. Method for halogenating or radiohalogenating a chemical compound

    DOE Patents [OSTI]

    Kabalka, George W.

    2006-05-09

    A method for obtaining a halogenated organic compound, whereby an organotrifluoroborate compound is reacted with a halide ion in the presence of an oxidizing agent to produce the corresponding halogenated organic compound. The method may be used for producing radiohalogenated organic compounds.

  3. C3E Spotlights Women Leaders in Clean Energy Careers | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    C3E Spotlights Women Leaders in Clean Energy Careers C3E Spotlights Women Leaders in Clean Energy Careers September 16, 2014 - 12:17pm Addthis Watch highlights from last year's Women in Clean Energy Symposium -- an annual event that is working to build a community of professionals dedicated to advancing the careers and goals of women in clean energy. | Video by Matty Greene, Energy Department. Caroline McGregor Policy Analyst, Office of International Affairs How can I participate? Watch the

  4. Metal halogen battery construction with improved technique for producing halogen hydrate

    DOE Patents [OSTI]

    Fong, Walter L.; Catherino, Henry A.; Kotch, Richard J.

    1983-01-01

    An improved electrical energy storage system comprising, at least one cell having a positive electrode and a negative electrode separated by aqueous electrolyte, a store means wherein halogen hydrate is formed and stored as part of an aqueous material having a liquid level near the upper part of the store, means for circulating electrolyte through the cell, conduit means for transmitting halogen gas formed in the cell to a hydrate forming apparatus associated with the store, said hydrate forming apparatus including, a pump to which there is introduced quantities of the halogen gas and chilled water, said pump being located in the store and an outlet conduit leading from the pump and being substantially straight and generally vertically disposed and having an exit discharge into the gas space above the liquid level in the store, and wherein said hydrate forming apparatus is highly efficient and very resistant to plugging or jamming. The disclosure also relates to an improved method for producing chlorine hydrate in zinc chlorine batteries.

  5. Tungsten Mtn Geothermal Project | Open Energy Information

    Open Energy Info (EERE)

    "","icon":"","group":"","inlineLabel":"","visitedicon":"" Hide Map Location County Churchill County, UT Geothermal Area Tungsten Mountain Geothermal Area Geothermal Region...

  6. Lab Spotlight: Sandia National Lab Team Wins Best in Class Sustainability

    National Nuclear Security Administration (NNSA)

    Award | National Nuclear Security Administration Lab Spotlight: Sandia National Lab Team Wins Best in Class Sustainability Award | National Nuclear Security Administration Facebook Twitter Youtube Flickr RSS People Mission Managing the Stockpile Preventing Proliferation Powering the Nuclear Navy Emergency Response Recapitalizing Our Infrastructure Countering Nuclear Terrorism About Our Programs Our History Who We Are Our Leadership Our Locations Budget Our Operations Library Bios

  7. Halogenated naphthyl methoxy piperidines for mapping serotonin transporter sites

    DOE Patents [OSTI]

    Goodman, M.M.; Faraj, B.

    1999-07-06

    Halogenated naphthyl methoxy piperidines having a strong affinity for the serotonin transporter are disclosed. Those compounds can be labeled with positron-emitting and/or gamma emitting halogen isotopes by a late step synthesis that maximizes the useable lifeterm of the label. The labeled compounds are useful for localizing serotonin transporter sites by positron emission tomography and/or single photon emission computed tomography.

  8. Determining thermochemical properties of halogenated metals: On enabling

    Office of Scientific and Technical Information (OSTI)

    the rapid assessment of agent defeat formulations (Technical Report) | SciTech Connect Technical Report: Determining thermochemical properties of halogenated metals: On enabling the rapid assessment of agent defeat formulations Citation Details In-Document Search Title: Determining thermochemical properties of halogenated metals: On enabling the rapid assessment of agent defeat formulations Authors: M.Zaug, J ; Bastea, S Publication Date: 2014-06-25 OSTI Identifier: 1149562 Report Number(s):

  9. Halogenated naphthyl methoxy piperidines for mapping serotonin transporter sites

    DOE Patents [OSTI]

    Goodman, Mark M. (Atlanta, GA); Faraj, Bahjat (Lithonia, GA)

    1999-01-01

    Halogenated naphthyl methoxy piperidines having a strong affinity for the serotonin transporter are disclosed. Those compounds can be labeled with positron-emitting and/or gamma emitting halogen isotopes by a late step synthesis that maximizes the useable lifeterm of the label. The labeled compounds are useful for localizing serotonin transporter sites by positron emission tomography and/or single photon emission computed tomography.

  10. Treatment of halogen-containing waste and other waste materials

    DOE Patents [OSTI]

    Forsberg, Charles W. (Oak Ridge, TN); Beahm, Edward C. (Oak Ridge, TN); Parker, George W. (Concord, TN)

    1997-01-01

    A process for treating a halogen-containing waste material. The process provides a bath of molten glass containing a sacrificial metal oxide capable of reacting with a halogen in the waste material. The sacrificial metal oxide is present in the molten glass in at least a stoichiometric amount with respect to the halogen in the waste material. The waste material is introduced into the bath of molten glass to cause a reaction between the halogen in the waste material and the sacrificial metal oxide to yield a metal halide. The metal halide is a gas at the temperature of the molten glass. The gaseous metal halide is separated from the molten glass and contacted with an aqueous scrubber solution of an alkali metal hydroxide to yield a metal hydroxide or metal oxide-containing precipitate and a soluble alkali metal halide. The precipitate is then separated from the aqueous scrubber solution. The molten glass containing the treated waste material is removed from the bath as a waste glass. The process of the invention can be used to treat all types of waste material including radioactive wastes. The process is particularly suited for separating halogens from halogen-containing wastes.

  11. Treatment of halogen-containing waste and other waste materials

    DOE Patents [OSTI]

    Forsberg, C.W.; Beahm, E.C.; Parker, G.W.

    1997-03-18

    A process is described for treating a halogen-containing waste material. The process provides a bath of molten glass containing a sacrificial metal oxide capable of reacting with a halogen in the waste material. The sacrificial metal oxide is present in the molten glass in at least a stoichiometric amount with respect to the halogen in the waste material. The waste material is introduced into the bath of molten glass to cause a reaction between the halogen in the waste material and the sacrificial metal oxide to yield a metal halide. The metal halide is a gas at the temperature of the molten glass. The gaseous metal halide is separated from the molten glass and contacted with an aqueous scrubber solution of an alkali metal hydroxide to yield a metal hydroxide or metal oxide-containing precipitate and a soluble alkali metal halide. The precipitate is then separated from the aqueous scrubber solution. The molten glass containing the treated waste material is removed from the bath as a waste glass. The process of the invention can be used to treat all types of waste material including radioactive wastes. The process is particularly suited for separating halogens from halogen-containing wastes. 3 figs.

  12. Metal halogen battery system with multiple outlet nozzle for hydrate

    DOE Patents [OSTI]

    Bjorkman, Jr., Harry K.

    1983-06-21

    A metal halogen battery system, including at least one cell having a positive electrode and a negative electrode contacted by aqueous electrolyte containing the material of said metal and halogen, store means whereby halogen hydrate is formed and stored as part of an aqueous material, means for circulating electrolyte through the cell and to the store means, and conduit means for transmitting halogen gas formed in the cell to a hydrate former whereby the hydrate is formed in association with the store means, said store means being constructed in the form of a container which includes a filter means, said filter means being inoperative to separate the hydrate formed from the electrolyte, said system having, a hydrate former pump means associated with the store means and being operative to intermix halogen gas with aqueous electrolyte to form halogen hydrate, said hydrate former means including, multiple outlet nozzle means connected with the outlet side of said pump means and being operative to minimize plugging, said nozzle means being comprised of at least one divider means which is generally perpendicular to the rotational axes of gears within the pump means, said divider means acting to divide the flow from the pump means into multiple outlet flow paths.

  13. High strength and density tungsten-uranium alloys

    DOE Patents [OSTI]

    Sheinberg, Haskell (Los Alamos, NM)

    1993-01-01

    Alloys of tungsten and uranium and a method for making the alloys. The amount of tungsten present in the alloys is from about 55 vol % to about 85 vol %. A porous preform is made by sintering consolidated tungsten powder. The preform is impregnated with molten uranium such that (1) uranium fills the pores of the preform to form uranium in a tungsten matrix or (2) uranium dissolves portions of the preform to form a continuous uranium phase containing tungsten particles.

  14. Better Buildings: Financing and Incentives: Spotlight on Michigan: Experiment to Find the Right Mix of Incentives

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    betterbuildings.energy.gov/neighborhoods 1 Spotlight on Michigan: Experiment to Find the Right Mix of Incentives With support from the U.S. Energy Department's Better Buildings Neighborhood Program, a diverse coalition of partners under the banner of BetterBuildings for Michigan designed 27 neighborhood "sweeps" across the state. These targeted outreach campaigns applied varying incentives and outreach strategies to designated neighbor- hoods with a goal to understand which incentives

  15. Spotlight on Austin, Texas: Let Your Contractor Be Your Guide for Big Rewards

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    1 Spotlight on Austin, Texas: Let Your Contractor Be Your Guide for Big Rewards Workforce All About Contractors Austin Energy, a municipally owned utility, has a long history of collaborating closely with the building contractors in its area to deliver energy efficiency programs, which benefits both parties involved. Because contractors understand that Austin Energy has made a long-term commitment to supporting energy efficiency, they have been willing to invest time and money into the technical

  16. Spotlight on Seattle, Washington: Community Partnerships Work to Extend Program Reach

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Revised July 2011 Version 2 Spotlight on Seattle, Washington: Community Partnerships Work to Extend Program Reach Getting Started 1 Seattle Moves the Needle With the Help of Its Partners Seattle's Community Power Works (CPW) program has engaged a vast network of partners to build on existing capacity and knowledge, extending the reach of its program in a short period of time. By evaluating potential partnerships and identifying strategic opportuni- ties to augment and enhance local ideas and

  17. CALiPER Benchmark Report: Performance of Halogen Incandescent MR16 Lamps and LED Replacement

    SciTech Connect (OSTI)

    Paget, M. L.; Lingard, R. D.; Myer, M. A.

    2008-11-01

    This benchmark report addresses the halogen MR16 lamp and its commercially available light-emitting diode (LED) replacements.

  18. Symmetric and asymmetric halogen-containing metallocarboranylporphyrins and uses thereof

    DOE Patents [OSTI]

    Miura, Michiko; Wu, Haitao

    2013-05-21

    The present invention is directed to low toxicity boronated compounds and methods for their use in the treatment, visualization, and diagnosis of tumors. More specifically, the present invention is directed to low toxicity halogenated, carborane-containing 5,10,15,20-tetraphenylporphyrin compounds and methods for their use particularly in boron neutron capture therapy (BNCT) and photodynamic therapy (PDT) for the treatment of tumors of the brain, head and neck, and surrounding tissue. The invention is also directed to using these halogenated, carborane-containing tetraphenylporphyrin compounds in methods of tumor imaging and/or diagnosis such as MRI, SPECT, or PET.

  19. Method for selective dehalogenation of halogenated polyaromatic compounds

    DOE Patents [OSTI]

    Farcasiu, Malvina (Pittsburgh, PA); Petrosius, Steven C. (Library, PA)

    1994-01-01

    A method for dehalogenating halogenated polyaromatic compounds is provided wherein the polyaromatic compounds are mixed with a hydrogen donor solvent and a carbon catalyst in predetermined proportions, the mixture is maintained at a predetermined pressure, and the mixture is heated to a predetermined temperature and for a predetermined time.

  20. Process for oxidation of hydrogen halides to elemental halogens

    DOE Patents [OSTI]

    Lyke, Stephen E. (Middleton, WI)

    1992-01-01

    An improved process for generating an elemental halogen selected from chlorine, bromine or iodine, from a corresponding hydrogen halide by absorbing a molten salt mixture, which includes sulfur, alkali metals and oxygen with a sulfur to metal molar ratio between 0.9 and 1.1 and includes a dissolved oxygen compound capable of reacting with hydrogen halide to produce elemental halogen, into a porous, relatively inert substrate to produce a substrate-supported salt mixture. Thereafter, the substrate-supported salt mixture is contacted (stage 1) with a hydrogen halide while maintaining the substrate-supported salt mixture during the contacting at an elevated temperature sufficient to sustain a reaction between the oxygen compound and the hydrogen halide to produce a gaseous elemental halogen product. This is followed by purging the substrate-supported salt mixture with steam (stage 2) thereby recovering any unreacted hydrogen halide and additional elemental halogen for recycle to stage 1. The dissolved oxygen compound is regenerated in a high temperature (stage 3) and an optical intermediate temperature stage (stage 4) by contacting the substrate-supported salt mixture with a gas containing oxygen whereby the dissolved oxygen compound in the substrate-supported salt mixture is regenerated by being oxidized to a higher valence state.

  1. Growth of tungsten oxide on carbon nanowalls templates

    SciTech Connect (OSTI)

    Wang, Hua; Su, Yan; Chen, Shuo; Quan, Xie

    2013-03-15

    Highlights: ? Tungsten oxide deposited on carbon nanowalls by hot filament chemical vapor deposition technique. ? This composite has two-dimensional uniform morphology with a crystalline structure of monoclinic tungsten trioxide. ? Surface photoelectric voltage measurements show that this product has photoresponse properties. - Abstract: In the present work we present a simple approach for coupling tungsten oxide with carbon nanowalls. The two-dimensional carbon nanowalls with open boundaries were grown using plasma enhanced hot filament chemical vapor deposition, and the subsequent tungsten oxide growth was performed in the same equipment by direct heating of a tungsten filament. The tungsten oxide coating is found to have uniform morphology with a crystalline structure of monoclinic tungsten trioxide. Surface photoelectric voltage measurements show that this product has photoresponse properties. The method of synthesis described here provides an operable route to the production of two-dimensional tungsten oxide nanocomposites.

  2. Gas tungsten arc welder with electrode grinder

    DOE Patents [OSTI]

    Christiansen, David W. (Kennewick, WA); Brown, William F. (West Richland, WA)

    1984-01-01

    A welder for automated closure of fuel pins by a gas tungsten arc process in which a rotating length of cladding is positioned adjacent a welding electrode in a sealed enclosure. An independently movable axial grinder is provided in the enclosure for refurbishing the used electrode between welds.

  3. Joining of Tungsten Armor Using Functional Gradients

    SciTech Connect (OSTI)

    John Scott O'Dell

    2006-12-31

    The joining of low thermal expansion armor materials such as tungsten to high thermal expansion heat sink materials has been a major problem in plasma facing component (PFC) development. Conventional planar bonding techniques have been unable to withstand the high thermal induced stresses resulting from fabrication and high heat flux testing. During this investigation, innovative functional gradient joints produced using vacuum plasma spray forming techniques have been developed for joining tungsten armor to copper alloy heat sinks. A model was developed to select the optimum gradient architecture. Based on the modeling effort, a 2mm copper rich gradient was selected. Vacuum plasma pray parameters and procedures were then developed to produce the functional gradient joint. Using these techniques, dual cooling channel, medium scale mockups (32mm wide x 400mm length) were produced with vacuum plasma spray formed tungsten armor. The thickness of the tungsten armor was up to 5mm thick. No evidence of debonding at the interface between the heat sink and the vacuum plasma sprayed material was observed.

  4. Halogen eAppraisal - Performance Appraisals | The Ames Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Halogen eAppraisal - Performance Appraisals 2016 Performance Appraisal Process 2/1 - 2/10: Employee writes self-appraisal. 2/11 - 2/28: Evaluating Supervisor writes appraisals for Direct Reports. 2/28 - 3/11: Evaluating Supervisor meets with Direct Reports; Evaluating Supervisor and Direct Report sign off on the appraisal; Second Level Manager reviews and approves appraisals. Unless your appraisal requires Second Level Manager review and approval, all of the other steps listed in this timeframe

  5. Catalytic ionic hydrogenation of ketones using tungsten or molybdenum organometallic species

    DOE Patents [OSTI]

    Voges, Mark; Bullock, R. Morris

    2000-01-01

    The present invention is a process for the catalytic hydrogenation of ketones and aldehydes to alcohols at low temperatures and pressures using organometallic molybdenum and tungsten complexes. The functional group is selected from groups represented by the formulas R(C.dbd.O)R' and R(C.dbd.O)H, wherein R and R' are selected from hydrogen or any alkyl or aryl group. The active catalyst for the process has the form: [CpM(CO).sub.2 (PR*.sub.3) L].sup.+ A.sup.-, where Cp=.eta..sup.5 -R.sup..tangle-solidup..sub.m C.sub.5 H.sub.5-m and R.sup..tangle-solidup. represents an alkyl group or a halogen (F, Cl, Br, I) or R.sup..tangle-solidup. =OR' (where R'=H, an alkyl group or an aryl group) or R.sup..tangle-solidup. =CO.sub.2 R' (where R'=H, an alkyl group or an aryl group) and m=0 to 5; M represents a molybdenum atom or a tungsten atom; R*.sub.3 represents three hydrocarbon groups selected from a cyclohexyl group (C.sub.6 H.sub.11), a methyl group (CH.sub.3), and a phenyl group (C.sub.6 H.sub.5) and all three R* groups can be the same or different or two of the three groups can be the same; L represents a ligand; and A.sup.- represents an anion. In another embodiment, one, two or three of the R* groups can be an OR*.

  6. Zinc halogen battery electrolyte composition with lead additive

    DOE Patents [OSTI]

    Henriksen, Gary L.

    1981-01-01

    This disclosure relates to a zinc halogen battery electrolyte composition containing an additive providing improved zinc-on-zinc recyclability. The improved electrolyte composition involves the use of a lead additive to inhibit undesirable irregular plating and reduce nodular or dendritic growth on the electrode surface. The lead-containing electrolyte composition of the present invention appears to influence not only the morphology of the base plate zinc, but also the morphology of the zinc-on-zinc replate. In addition, such lead-containing electrolyte compositions appear to reduce hydrogen formation.

  7. Student Spotlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Mekena McGrew Mekena McGrew First-year physics PhD student University of California, Merced Area of NIF: Advanced Radiographic Capability (ARC) Project: Created a Single-shot, Second Harmonic Generation Frequency Resolved Optical Gating (SHG FROG) system for damage testing Tell us about your work at NIF.FROG is a technique for characterizing ultra-short pulses. With them, we can measure pulse parameters, such as the pulse intensity, pulse width, spectrum, and spectral phase. It is important to

  8. Student Spotlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Czapla Nick Czapla Project Name: Image Analysis Classification algorithm to automatically classify NIF optics damage sites Project Description: Develop a classification system of potential damage sites on the NIF Final Optics based on the sites' morphology (i.e., shape, color, size, roughness of edges, etc.) and automate the classification process using a wavelet transformation algorithm, called the Image Analysis Classification (IAC), written by Wim deVries. The project includes the manual

  9. Student Spotlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Zobrist Nick Zobrist Junior (graduating spring 2015) Physics and Applied Mathematics, U.C. Berkeley, Area of NIF: Optics Inspection Tell us about your work at NIF. I'm here to contribute to the optics inspection algorithms that evaluate the condition of NIF's optics. One of the ways I've done this is by modeling reflection locations which is a new capability that they've needed, but I've helped my mentor, Laura Kegelmeyer, with parts of other projects as well. You received an award for your work

  10. Student Spotlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Chea default image Completing an MS in Chemical Engineering Stanford University Area of NIF: Target fabrication, particularly tents Project: Optimization of Ultrathin Films Tell...

  11. Student Spotlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    damage type all in the context of how it would be best used in the testing and molding of the IAC algorithm. What you can learn at NIF: One of the main things I've learned...

  12. Employee Spotlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    he was a regular tourist taking a road trip through the American West with three Italian friends. 41215 Sim Balkey Sim Balkey-On the way up The "kid who has the goods" has...

  13. Spotlights Archive

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ...

  14. Deuterium Retention in Tungsten-Coated Reduced Activation Ferritic...

    Office of Environmental Management (EM)

    material (PFM) in fusion reactor Development of tungsten coating on PFM (such as F82H) Bulk W is heavy Influences density control of fusion plasma, and safety ...

  15. Line spectrum and ion temperature measurements from tungsten...

    Office of Scientific and Technical Information (OSTI)

    Line spectrum and ion temperature measurements from tungsten ions at low ionization stages ... Citation Details In-Document Search Title: Line spectrum and ion temperature measurements ...

  16. Double, Double Toil and Trouble: Tungsten Burns and Helium Bubbles...

    Office of Science (SC) Website

    larger when it bursts, creating more surface debris. The colors indicate helium atoms (blue) and tungsten atoms (red). The Science When simulated helium (He) bubbles grow quickly,...

  17. A visible light-sensitive tungsten carbide/tungsten trioxde composite photocatalyst

    SciTech Connect (OSTI)

    Kim, Young-ho; Irie, Hiroshi; Hashimoto, Kazuhito

    2008-05-05

    A photocatalyst composed of tungsten carbide (WC) and tungsten oxide (WO{sub 3}) has been prepared by the mechanical mixing of each powder. Its photocatalytic activity was evaluated by the gaseous isopropyl alcohol decomposition process. The photocatalyst showed high visible light photocatalytic activity with a quantum efficiency of 3.2% for 400-530 nm light. The photocatalytic mechanism was explained by means of enhanced oxygen reduction reaction due to WC, which may serve as a multielectron reduction catalyst, as well as the photogeneration of holes in the valence band of WO{sub 3}.

  18. Halogen-free benzoxazine based curable compositions for high TG applications

    DOE Patents [OSTI]

    Tietze, Roger; Nguyen, Yen-Loan

    2015-03-10

    The present invention provides a halogen-free curable composition including a benzoxazine monomer, at least one epoxy resin, a catalyst, a toughening agent and a solvent. The halogen-free curable composition is especially suited for use in automobile and aerospace applications since the composition, upon curing, produces a composite having a high glass transition temperature.

  19. Better Buildings - Spotlight on Portland, Oregon; Financing and Incetntives: Use Incentives to Get Attention and Encourage Deep Savings

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    betterbuildings.energy.gov/neighborhoods 1 June 2012 Financing and Incentives Spotlight on Portland, Oregon: Use Incentives to Get Attention and Encourage Deep Savings Key Takeaways ■■ Use performance-based incentives to nudge customers toward greater energy savings ■■ Promote recurring, limited- time bonus rebates to grab customers' attention, even when reducing incentive levels ■■ Approve financing early and make it an integral part of the program to reduce barriers to customer

  20. Measurement of uptake and release of tritium by tungsten

    SciTech Connect (OSTI)

    Nakayama, M.; Torikai, Y.; Saito, M.; Penzhorn, R.D.; Isobe, K.; Yamanishi, T.; Kurishita, H.

    2015-03-15

    Tungsten is currently contemplated as plasma facing material for the divertor of future fusion machines. In this paper the uptake of tritium by tungsten and its release behavior have been investigated. Tungsten samples have been annealed at various temperatures and loaded at also different temperatures with deuterium containing 7.2 % tritium at a pressure of 1.2 kPa. A specific system was designed to assess the release of tritiated water and molecular tritium by the samples. Due to the rather low solubility of hydrogen isotopes in tungsten it is particularly important to be aware of the presence of hydrogen traps or thin oxide films. As shown in this work, traps or oxide films may affect the retention capability of tungsten and lead to significantly modified release properties. It became clear that there were capture sites that had different thermal stability and different capture intensity in tungsten after polishing, or oxide films that were grown on the surface of tungsten and had barrier effects.

  1. Polaron absorption in amorphous tungsten oxide films

    SciTech Connect (OSTI)

    Berggren, Lars; Azens, Andris; Niklasson, Gunnar A.

    2001-08-15

    Amorphous thin films of tungsten oxide were deposited by sputtering onto glass substrates covered by conductive indium--tin oxide. The density and stoichiometry were determined by Rutherford backscattering spectrometry. Lithium ions were intercalated electrochemically into the films. The optical reflectance and transmittance were measured in the wavelength range from 0.3 to 2.5 {mu}m, at a number of intercalation levels. The polaron absorption peak becomes more symmetric and shifts to higher energies until an intercalation level of 0.25 to 0.3 Li{sup +}/W, where a saturation occurs. The shape of the polaron peak is in very good agreement with the theory of Bryksin [Fiz. Tverd. Tela 24, 1110 (1982)]. Within this model, the shift of the absorption peak is interpreted as an increase in the Fermi level of the material as more Li ions are inserted. {copyright} 2001 American Institute of Physics.

  2. Tungsten-doped thin film materials

    DOE Patents [OSTI]

    Xiang, Xiao-Dong; Chang, Hauyee; Gao, Chen; Takeuchi, Ichiro; Schultz, Peter G.

    2003-12-09

    A dielectric thin film material for high frequency use, including use as a capacitor, and having a low dielectric loss factor is provided, the film comprising a composition of tungsten-doped barium strontium titanate of the general formula (Ba.sub.x Sr.sub.1-x)TiO.sub.3, where X is between about 0.5 and about 1.0. Also provided is a method for making a dielectric thin film of the general formula (Ba.sub.x Sr.sub.1-x)TiO.sub.3 and doped with W, where X is between about 0.5 and about 1.0, a substrate is provided, TiO.sub.2, the W dopant, Ba, and optionally Sr are deposited on the substrate, and the substrate containing TiO.sub.2, the W dopant, Ba, and optionally Sr is heated to form a low loss dielectric thin film.

  3. Covalent Attachment of Diamondoid Phosphonic Acid Dichlorides to Tungsten

    Office of Scientific and Technical Information (OSTI)

    Oxide Surfaces (Journal Article) | SciTech Connect Covalent Attachment of Diamondoid Phosphonic Acid Dichlorides to Tungsten Oxide Surfaces Citation Details In-Document Search Title: Covalent Attachment of Diamondoid Phosphonic Acid Dichlorides to Tungsten Oxide Surfaces Authors: Li, Fei Hua ; Fabbri, Jason D. ; Yurchenko, Raisa I. ; Mileshkin, Alexander N. ; Hohman, J.Nathan ; Yan, Hao ; Yuan, Hongyuan ; Tran, Ich C. ; Willey, Trevor M. ; Bagge-Hansen, Michael ; Dahl, Jeremy E.P. ; Carlson,

  4. Exploring hardness enhancement in superhard tungsten tetraboride-based

    Office of Scientific and Technical Information (OSTI)

    solid solutions using radial X-ray diffraction (Journal Article) | SciTech Connect Exploring hardness enhancement in superhard tungsten tetraboride-based solid solutions using radial X-ray diffraction Citation Details In-Document Search This content will become publicly available on July 29, 2016 Title: Exploring hardness enhancement in superhard tungsten tetraboride-based solid solutions using radial X-ray diffraction Authors: Xie, Miao [1] ; Mohammadi, Reza [2] ; Turner, Christopher L. [1]

  5. DOE - Office of Legacy Management -- Callite Tungsten Co - NJ 36

    Office of Legacy Management (LM)

    Callite Tungsten Co - NJ 36 FUSRAP Considered Sites Site: Callite Tungsten Co. (NJ.36 ) Eliminated from consideration under FUSRAP Designated Name: Not Designated Alternate Name: None Location: Union City , New Jersey NJ.36-1 Evaluation Year: Circa 1990 NJ.36-2 Site Operations: Metal fabrication - cold rolling - of uranium metal indicated at this site. NJ.36-1 Site Disposition: Eliminated - only one document was found that indicated uranium was handled at this site - No indication of quantities

  6. Effect of reinforcement phase on the mechanical property of tungsten nanocomposite synthesized by spark plasma sintering

    SciTech Connect (OSTI)

    Lee, Jin -Kyu; Kim, Song -Yi; Ott, Ryan T.; Kim, Jin -Young; Eckert, Jrgen; Lee, Min -Ha

    2015-07-15

    Nanostructured tungsten composites were fabricated by spark plasma sintering of nanostructured composite powders. The composite powders, which were synthesized by mechanical milling of tungsten and Ni-based alloy powders, are comprised of alternating layers of tungsten and metallic glass several hundred nanometers in size. The mechanical behavior of the nanostructured W composite is similar to pure tungsten, however, in contrast to monolithic pure tungsten, some macroscopic compressive plasticity accompanies the enhanced maximum strength up to 2.4 GPa by introducing reinforcement. As a result, we have found that the mechanical properties of the composites strongly depend on the uniformity of the nano-grained tungsten matrix and reinforcement phase distribution.

  7. Process for removing halogenated aliphatic and aromatic compounds from petroleum products

    DOE Patents [OSTI]

    Googin, John M. (Oak Ridge, TN); Napier, John M. (Oak Ridge, TN); Travaglini, Michael A. (Oliver Springs, TN)

    1983-01-01

    A process for removing halogenated aliphatic and aromatic compounds, e.g., polychlorinated biphenyls, from petroleum products by solvent extraction. The halogenated aliphatic and aromatic compounds are extracted from a petroleum product into a polar solvent by contacting the petroleum product with the polar solvent. The polar solvent is characterized by a high solubility for the extracted halogenated aliphatic and aromatic compounds, a low solubility for the petroleum product and considerable solvent power for polyhydroxy compound. The preferred polar solvent is dimethylformamide. A miscible compound, such as, water or a polyhydroxy compound, is added to the polar extraction solvent to increase the polarity of the polar extraction solvent. The halogenated aliphatic and aromatic compounds are extracted from the highly-polarized mixture of water or polyhydroxy compound and polar extraction solvent into a low polar or nonpolar solvent by contacting the water or polyhydroxy compound-polar solvent mixture with the low polar or nonpolar solvent. The halogenated aliphatic and aromatic compounds and the low polar or nonpolar solvent are separated by physical means, e.g., vacuum evaporation. The polar and nonpolar solvents are recovered from recycling. The process can easily be designed for continuous operation. Advantages of the process include that the polar solvent and a major portion of the nonpolar solvent can be recycled, the petroleum products are reclaimable and the cost for disposing of waste containing polychlorinated biphenyls is significantly reduced.

  8. Process for removing halogenated aliphatic and aromatic compounds from petroleum products

    DOE Patents [OSTI]

    Googin, J.M.; Napier, J.M.; Travaglini, M.A.

    1983-09-20

    A process is described for removing halogenated aliphatic and aromatic compounds, e.g., polychlorinated biphenyls, from petroleum products by solvent extraction. The halogenated aliphatic and aromatic compounds are extracted from a petroleum product into a polar solvent by contacting the petroleum product with the polar solvent. The polar solvent is characterized by a high solubility for the extracted halogenated aliphatic and aromatic compounds, a low solubility for the petroleum product and considerable solvent power for polyhydroxy compound. The preferred polar solvent is dimethylformamide. A miscible compound, such as, water or a polyhydroxy compound, is added to the polar extraction solvent to increase the polarity of the polar extraction solvent. The halogenated aliphatic and aromatic compounds are extracted from the highly-polarized mixture of water or polyhydroxy compound and polar extraction solvent into a low polar or nonpolar solvent by contacting the water or polyhydroxy compound-polar solvent mixture with the low polar or nonpolar solvent. The halogenated aliphatic and aromatic compounds and the low polar or nonpolar solvent are separated by physical means, e.g., vacuum evaporation. The polar and nonpolar solvents are recovered from recycling. The process can easily be designed for continuous operation. Advantages of the process include that the polar solvent and a major portion of the nonpolar solvent can be recycled, the petroleum products are reclaimable and the cost for disposing of waste containing polychlorinated biphenyls is significantly reduced. 1 fig.

  9. Tungsten dust impact on ITER-like plasma edge

    SciTech Connect (OSTI)

    Smirnov, R. D. Krasheninnikov, S. I.; Pigarov, A. Yu.; Rognlien, T. D.

    2015-01-15

    The impact of tungsten dust originating from divertor plates on the performance of edge plasma in ITER-like discharge is evaluated using computer modeling with the coupled dust-plasma transport code DUSTT-UEDGE. Different dust injection parameters, including dust size and mass injection rates, are surveyed. It is found that tungsten dust injection with rates as low as a few mg/s can lead to dangerously high tungsten impurity concentrations in the plasma core. Dust injections with rates of a few tens of mg/s are shown to have a significant effect on edge plasma parameters and dynamics in ITER scale tokamaks. The large impact of certain phenomena, such as dust shielding by an ablation cloud and the thermal force on tungsten ions, on dust/impurity transport in edge plasma and consequently on core tungsten contamination level is demonstrated. It is also found that high-Z impurities provided by dust can induce macroscopic self-sustained plasma oscillations in plasma edge leading to large temporal variations of edge plasma parameters and heat load to divertor target plates.

  10. Mechanism of vacancy formation induced by hydrogen in tungsten

    SciTech Connect (OSTI)

    Liu, Yi-Nan; Association EURATOM-TEKES, University of Helsinki, Helsinki, PO Box 64, 00560 ; Ahlgren, T.; Bukonte, L.; Nordlund, K.; Shu, Xiaolin; Yu, Yi; Lu, Guang-Hong; Li, Xiao-Chun

    2013-12-15

    We report a hydrogen induced vacancy formation mechanism in tungsten based on classical molecular dynamics simulations. We demonstrate the vacancy formation in tungsten due to the presence of hydrogen associated directly with a stable hexagonal self-interstitial cluster as well as a linear crowdion. The stability of different self-interstitial structures has been further studied and it is particularly shown that hydrogen plays a crucial role in determining the configuration of SIAs, in which the hexagonal cluster structure is preferred. Energetic analysis has been carried out to prove that the formation of SIA clusters facilitates the formation of vacancies. Such a mechanism contributes to the understanding of the early stage of the hydrogen blistering in tungsten under a fusion reactor environment.

  11. Tungsten-yttria carbide coating for conveying copper

    DOE Patents [OSTI]

    Rothman, Albert J. (Livermore, CA)

    1993-01-01

    A method is provided for providing a carbided-tungsten-yttria coating on the interior surface of a copper vapor laser. The surface serves as a wick for the condensation of liquid copper to return the condensate to the interior of the laser for revolatilization.

  12. FABRICATION OF GAS-FILLED TUNGSTEN-COATED GLASS SHELLS

    SciTech Connect (OSTI)

    NIKROO,A; BAUGH,W; STEINMAN,D.A

    2003-06-01

    OAK-B135 Deuterium (D{sub 2}) filled glass shells coated with a high Z element are needed for high energy density (HED) experiments by researchers at Los Alamos National Laboratory. They report here on our initial attempt to produce such shells. Glass shells made using the drop tower technique were coated with gold, palladium or tungsten, or a mixture of two of these elements. It was found that gold and palladium coatings did not stick well to the glass and resulted in poor or delaminated films. Tungsten coatings resulted in films suitable for these targets. Bouncing of shells during coating resulted in uniform tungsten coatings, but the surface of such coatings were filled with small nodules. Proper agitation of shells using a tapping technique resulted in smooth films with minimal particulate contamination. For coating rates of {approx} 0.15 {micro}m/hr coatings with {approx} 2 nm RMS surface finish could be deposited. The surface roughness of coatings at higher rates, 0.7 {micro}m/hr, was considerably worse ({approx} 100 nm RMS). The columnar structure of the coatings allowed permeation filling of the tungsten coated glass shells with deuterium at 300 C.

  13. Fabrication of Gas-Filled Tungsten-Coated Glass Shells

    SciTech Connect (OSTI)

    Nikroo, A.; Baugh, W.; Steinman, D.A.

    2004-03-15

    Deuterium (D{sub 2}) filled glass shells coated with a high Z element are needed for high energy density (HED) experiments by researchers at Los Alamos National Laboratory. We report here on our initial attempt to produce such shells. Glass shells made using the drop tower technique were coated with gold, palladium or tungsten, or a mixture of two of these elements. It was found that gold and palladium coatings did not stick well to the glass and resulted in poor or delaminated films. Tungsten coatings resulted in films suitable for these targets. Bouncing of shells during coating resulted in uniform tungsten coatings, but the surface of such coatings were filled with small nodules. Proper agitation of shells using a tapping technique resulted in smooth films with minimal particulate contamination. For coating rates of {approx}0.15 {mu}m/hr coatings with {approx}2 nm RMS surface finish could be deposited. The surface roughness of coatings at higher rates, 0.7 {mu}m/hr, was considerably worse ({approx}100 nm RMS). The columnar structure of the coatings allowed permeation filling of the tungsten coated glass shells with deuterium at 300 deg. C.

  14. Gas-tungsten arc welding of aluminum alloys

    DOE Patents [OSTI]

    Frye, L.D.

    1982-03-25

    The present invention is directed to a gas-tungsten arc welding method for joining together structures formed of aluminum alloy with these structures disposed contiguously to a heat-damagable substrate of a metal dissimilar to the aluminum alloy. The method of the present invention is practiced by diamond machining the fay surfaces of the aluminum alloy structures to profice a mirror finish thereon having a surface roughness in the order of about one microinch. The fay surface are aligned and heated sufficiently by the tungsten electrode to fuse the aluminum alloy continguous to the fay surfaces to effect the weld joint. The heat input used to provide an oxide-free weld is significantly less than that required if the fay surfaces were prepared by using conventional chemical and mechanical practices.

  15. Amorphous copper tungsten oxide with tunable band gaps

    SciTech Connect (OSTI)

    Chen Le; Shet, Sudhakar; Tang Houwen; Wang Heli; Yan Yanfa; Turner, John; Al-Jassim, Mowafak; Ahn, Kwang-soon

    2010-08-15

    We report on the synthesis of amorphous copper tungsten oxide thin films with tunable band gaps. The thin films are synthesized by the magnetron cosputtering method. We find that due to the amorphous nature, the Cu-to-W ratio in the films can be varied without the limit of the solubility (or phase separation) under appropriate conditions. As a result, the band gap and conductivity type of the films can be tuned by controlling the film composition. Unfortunately, the amorphous copper tungsten oxides are not stable in aqueous solution and are not suitable for the application of photoelectrochemical splitting of water. Nonetheless, it provides an alternative approach to search for transition metal oxides with tunable band gaps.

  16. The OPAL silicon-tungsten calorimeter front end electronics

    SciTech Connect (OSTI)

    Anderson, B.E.; Charalambous, A. . Dept. of Physics and Astronomy); Anderson, K. )

    1994-08-01

    A pair of small angle silicon-tungsten (Si-W) calorimeters has been built to measure the luminosity to a precision better than 0.1% in the OPAL experiment at the Large Electron Positron (LEP) collider at CERN near Geneva. Each calorimeter contains 19 layers of tungsten (W) plates and silicon (Si) detectors, corresponding to a total of 22 radiation lengths, sampled by about 1 m[sup 2] of detectors divided into 304 x64 independently read out channels. A complete electronics system has been developed, from the preamplifier up to the VME read out and control interface. It includes a fast trigger based on analogue sums. This paper describes how a large number of channels have been implemented in a dense environment, thanks to the use of ASIC's directly bonded on the detector.

  17. Effect of reinforcement phase on the mechanical property of tungsten nanocomposite synthesized by spark plasma sintering

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Lee, Jin -Kyu; Kim, Song -Yi; Ott, Ryan T.; Kim, Jin -Young; Eckert, Jürgen; TU Dresden, Dresden; Lee, Min -Ha

    2015-07-15

    Nanostructured tungsten composites were fabricated by spark plasma sintering of nanostructured composite powders. The composite powders, which were synthesized by mechanical milling of tungsten and Ni-based alloy powders, are comprised of alternating layers of tungsten and metallic glass several hundred nanometers in size. The mechanical behavior of the nanostructured W composite is similar to pure tungsten, however, in contrast to monolithic pure tungsten, some macroscopic compressive plasticity accompanies the enhanced maximum strength up to 2.4 GPa by introducing reinforcement. As a result, we have found that the mechanical properties of the composites strongly depend on the uniformity of the nano-grainedmore » tungsten matrix and reinforcement phase distribution.« less

  18. Deflection of light by using tungsten bronze crystals

    SciTech Connect (OSTI)

    Jelsma, L.F.; McWright, G.M.; Schumacher, F.A.; Neurgaonkar, R.R.

    1988-07-05

    This paper reports our preliminary results on an electrooptical light deflector for streak camera applications that uses tungsten bronze SBN:60% crystals. We found the performance of these ferroelectric crystals to be an order of magnitude better than the best LiNbO/sub 3/ crystals currently available. We discuss the theory and performance of this crystal as well as other bronze crystals for application to the streak camera. 8 refs., 5 figs., 2 tabs.

  19. Deuterium Retention in Tungsten-Coated Reduced Activation Ferritic/Martensitic Steel

    Office of Environmental Management (EM)

    Deuterium Retention in Tungsten-Coated Reduced Activation Ferritic/Martensitic Steel Yuji Yamauchi, Marco Armando, Naoto Nihei, Yuji Nobuta, Tomoaki Hino Division of Quantum Science and Engineering Faculty of engineering, Hokkaido University 1 Faculty of Engineering, Hokkaido University Background 2 INTRODUCTION 1 Tungsten (W) Good candidate as plasma-facing material (PFM) in fusion reactor Development of tungsten coating on PFM (such as F82H) Bulk W is heavy  Influences density control of

  20. 2-M Probe At Tungsten Mountain Area (Shevenell, Et Al., 2008...

    Open Energy Info (EERE)

    Jump to: navigation, search GEOTHERMAL ENERGYGeothermal Home Exploration Activity: 2-M Probe At Tungsten Mountain Area (Shevenell, Et Al., 2008) Exploration Activity Details...

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

    SciTech Connect (OSTI)

    Chu, Yueh-Chieh; Jiang, Gerald; Tu, Chia-Hao; Chang Chi; Liu, Chuan-pu; Ting, Jyh-Ming; Lee, Hsin-Li; Tzeng, Yonhua; Auciello, Orlando

    2012-06-15

    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.

  2. Process for removing halogenated aliphatic and aromatic compounds from petroleum products. [Polychlorinated biphenyls; methylene chloride; perchloroethylene; trichlorofluoroethane; trichloroethylene; chlorobenzene

    DOE Patents [OSTI]

    Googin, J.M.; Napier, J.M.; Travaglini, M.A.

    1982-03-31

    A process for removing halogenated aliphatic and aromatic compounds, e.g., polychlorinated biphenyls, from petroleum products by solvent extraction. The halogenated aliphatic and aromatic compounds are extracted from a petroleum product into a polar solvent by contracting the petroleum product with the polar solvent. The polar solvent is characterized by a high solubility for the extracted halogenated aliphatic and aromatic compounds, a low solubility for the petroleum product and considerable solvent power for polyhydroxy compound. The preferred polar solvent is dimethylformamide. A miscible polyhydroxy compound, such as, water, is added to the polar extraction solvent to increase the polarity of the polar extraction solvent. The halogenated aliphatic and aromatic compounds are extracted from the highly-polarized mixture of polyhydroxy compound and polar extraction solvent into a low polar or nonpolar solvent by contacting the polyhydroxy compound-polar solvent mixture with the low polar or nonpolar solvent. The halogenated aliphatic and aromatic compounds in the low polar or nonpolar solvent by physical means, e.g., vacuum evaporation. The polar and nonpolar solvents are recovered for recycling. The process can easily be designed for continuous operation. Advantages of the process include that the polar solvent and a major portion of the nonpolar solvent can be recycled, the petroleum products are reclaimable and the cost for disposing of waste containing polychlorinated biphenyls is significantly reduced. 2 tables.

  3. Dynamics of femtosecond laser produced tungsten nanoparticle plumes

    SciTech Connect (OSTI)

    Harilal, S. S.; Hassanein, A.; Farid, N.; School of Physics and Optical Engineering, Dalian University of Technology, Dalian 116024 ; Kozhevin, V. M.

    2013-11-28

    We investigated the expansion features of femtosecond laser generated tungsten nanoparticle plumes in vacuum. Fast gated images showed distinct two components expansion features, viz., plasma and nanoparticle plumes, separated by time of appearance. The persistence of plasma and nanoparticle plumes are ?500 ns and ?100 ?s, respectively, and propagating with velocities differed by 25 times. The estimated temperature of the nanoparticles showed a decreasing trend with increasing time and space. Compared to low-Z materials (e.g., Si), ultrafast laser ablation of high-Z materials like W provides significantly higher nanoparticle yield. A comparison between the nanoparticle plumes generated by W and Si is also discussed along with other metals.

  4. A Glove Box Enclosed Gas-Tungsten Arc Welding System

    SciTech Connect (OSTI)

    Reevr, E, M; Robino, C.V.

    1999-07-01

    This report describes an inert atmosphere enclosed gas-tungsten arc welding system which has been assembled in support of the MC2730, MC2730A and MC 3500 Radioisotope Thermoelectric Generator (RTG) Enhanced Surveillance Program. One goal of this program is to fabricate welds with microstructures and impurity levels which are similar to production heat source welds previously produced at Los Alamos National Laboratory and the Mound Facility. These welds will subsequently be used for high temperature creep testing as part of the overall component lifetime assessment. In order to maximize the utility of the welding system, means for local control of the arc atmosphere have been incorporated and a wide range of welding environments can easily be evaluated. The gas-tungsten arc welding system used in the assembly is computer controlled, includes two-axis and rotary motion, and can be operated in either continuous or pulsed modes. The system can therefore be used for detailed research studies of welding impurity effects, development of prototype weld schedules, or to mimic a significant range of production-like welding conditions. Fixturing for fabrication of high temperature creep test samples have been designed and constructed, and weld schedules for grip-tab and test welds have been developed. The microstructure of these welds have been evaluated and are consistent with those used during RTG production.

  5. Characterization of tungsten films and their hydrogen permeability

    SciTech Connect (OSTI)

    Nemani?, Vincenc Kova?, Janez; Lungu, Cristian; Porosnicu, Corneliu; Zajec, Bojan

    2014-11-01

    Prediction of tritium migration and its retention within fusion reactors is uncertain due to a significant role of the structural disorder that is formed on the surface layer after plasma exposure. Tungsten films deposited by any of the suitable methods are always disordered and contain a high density of hydrogen traps. Experiments on such films with hydrogen isotopes present a suitable complementary method, which improves the picture of the hydrogen interaction with fusion relevant materials. The authors report on the morphology, composition, and structure of tungsten films deposited by the thermionic vacuum arc method on highly permeable Eurofer substrates. Subsequently, hydrogen permeation studies through these films were carried out in a wide pressure range from 20 to 1000 mbars at 400?C. The final value of the permeation coefficient for four samples after 24?h at 400?C was between P?=?3.2??10{sup ?14}?mol?H{sub 2}/(m?s?Pa{sup 0.5}) and P?=?1.1??10{sup ?15}?mol H{sub 2}/(m s Pa{sup 0.5}). From the time evolution of the permeation flux, it was shown that diffusivity was responsible for the difference in the steady fluxes, as solubility was roughly the same. This is confirmed by XRD data taken on these samples.

  6. Process for the solvent extraction for the radiolysis and dehalogenation of halogenated organic compounds in soils, sludges, sediments and slurries

    DOE Patents [OSTI]

    Mincher, Bruce J. (3705 Creekside Dr., Idaho Falls, ID 83404); Curry, Randy Dale (1104 Merrill Ct., Columbia, MO 65203); Clevenger, Thomas E. (2512 Bluff Blvd., Columbia, MO 65201); Golden, Jeffry (12612 Cedarbrook La., Laurel, MD 20708)

    2000-01-01

    A process of extracting halogenated organic compounds, and particularly PCBs, from soil, sediment, slurry, sludge and dehalogenating the compounds contacting a contaminated soil sample with an extraction medium of a mixture of an alkane and a water miscible alcohol. The organic compounds dissolve in the extraction medium which is separated from the soil by passing water upwardly through the soil. The extraction medium floats to the surface of the water and is separated. Thereafter, the extraction medium containing the halogenated organic contaminants is subjected to ionizing radiation to radiolytically dehalogenate the compounds.

  7. Process for the solvent extraction for the radiolysis and dehalogenation of halogenated organic compounds in soils, sludges, sediments and slurries

    DOE Patents [OSTI]

    Mincher, Bruce J.; Curry, Randy Dale; Clevenger, Thomas E.; Golden, Jeffry

    2003-05-27

    A process of extracting halogenated organic compounds, and particularly PCBs, from soil, sediment, slurry, sludge and dehalogenating the compounds contacts a contaminated soil sample with an extraction medium of a mixture of an alkane and a water miscible alcohol. The organic compounds dissolve in the extraction medium which is separated from the soil by passing water upwardly through the soil. The extraction medium floats to the surface of the water and is separated. Thereafter, the extraction medium containing the halogenated organic contaminants is subjected to ionizing radiation to radiolytically dehalogenate the compounds.

  8. Process for the solvent extraction for the radiolysis and dehalogenation of halogenated organic compounds in soils, sludges, sediments and slurries

    DOE Patents [OSTI]

    Golden, Jeffry

    2007-02-13

    A process of extracting halogenated organic compounds, and particularly PCBs, from soil, sediment, slurry, sludge and dehalogenating the compounds contacts a contaminated soil sample with an extraction medium of a mixture of an alkane and a water miscible alcohol. The organic compounds dissolve in the extraction medium which is separated from the soil by passing water upwardly through the soil. The extraction medium floats to the surface of the water and is separated. Thereafter, the extraction medium containing the halogenated organic contaminants is subjected to ionizing radiation to radiolytically dehalogenate the compounds.

  9. Collisional-radiative modeling of tungsten at temperatures of 1200-2400

    Office of Scientific and Technical Information (OSTI)

    eV (Journal Article) | SciTech Connect Collisional-radiative modeling of tungsten at temperatures of 1200-2400 eV Citation Details In-Document Search Title: Collisional-radiative modeling of tungsten at temperatures of 1200-2400 eV We discuss new collisional-radiative modeling calculations of tungsten at moderate temperatures of 1200 to 2400 eV. Such plasma conditions are relevant to ongoing experimental work at ASDEX Upgrade and are expected to be relevant for ITER. Our calculations are

  10. Tunable carbon nanotube-tungsten carbide nanoparticles heterostructures by vapor deposition

    SciTech Connect (OSTI)

    Xia, Min; Guo, Hongyan; Ge, Changchun; Yan, Qingzhi Lang, Shaoting

    2014-05-14

    A simple, versatile route for the synthesis of carbon nanotube (CNT)-tungsten carbide nanoparticles heterostructures was set up via vapor deposition process. For the first time, amorphous CNTs (?-CNTs) were used to immobilized tungsten carbide nanoparticles. By adjusting the synthesis and annealing temperature, ?-CNTs/amorphous tungsten carbide, ?-CNTs/W{sub 2}C, and CNTs/W{sub 2}C/WC heterostructures were prepared. This approach provides an efficient method to attach other metal carbides and other nanoparticles to carbon nanotubes with tunable properties.

  11. Mechanisms of gas precipitation in plasma-exposed tungsten

    SciTech Connect (OSTI)

    R. D. Kolasinski; D. F. Cowgill; D. C. Donovan; M. Shimada

    2012-05-01

    Precipitation in subsurface bubbles is a key process that governs how hydrogen isotopes migrate through and become trapped within plasma-exposed tungsten. We describe a continuum-scale model of hydrogen diffusion in plasma-exposed materials that includes the effects of precipitation. The model can account for bubble expansion via dislocation loop punching, using an accurate equation of state to determine the internal pressure. This information is used to predict amount of hydrogen trapped by bubbles, as well as the conditions where the bubbles become saturated. In an effort to validate the underlying assumptions, we compare our results with published positron annihilation and thermal desorption spectroscopy data, as well as our own measurements using the tritium plasma experiment (TPE).

  12. Recent progress on gas tungsten arc welding of vanadium alloys

    SciTech Connect (OSTI)

    Grossbeck, M.L.; King, J.F.; Alexander, D.J.

    1997-08-01

    Emphasis has been placed on welding 6.4 mm plate, primarily by gas tungsten arc (GTA) welding. The weld properties were tested using blunt notch Charpy testing to determine the ductile to brittle transition temperature (DBTT). Erratic results were attributed to hydrogen and oxygen contamination of the welds. An improved gas clean-up system was installed on the welding glove box and the resulting high purity welds had Charpy impact properties similar to those of electron beam welds with similar grain size. A post-weld heat treatment (PWHT) of 950{degrees}C for two hours did not improve the properties of the weld in cases where low concentrations of impurities were attained. Further improvements in the gas clean-up system are needed to control hydrogen contamination.

  13. Molybdenum and tungsten nanostructures and methods for making and using same

    DOE Patents [OSTI]

    Kotaro, Sasaki; Chen, Wei-Fu; Muckerman, James T; Adzic, Radoslav R

    2015-01-06

    The present invention provides molybdenum and tungsten nanostructures, for example, nanosheets and nanoparticles, and methods of making and using same, including using such nanostructures as catlysts for hydrogen evolution reactions.

  14. Tungsten bridge for the low energy ignition of explosive and energetic materials

    DOE Patents [OSTI]

    Benson, David A. (Albuquerque, NM); Bickes, Jr., Robert W. (Albuquerque, NM); Blewer, Robert S. (Albuquerque, NM)

    1990-01-01

    A tungsten bridge device for the low energy ignition of explosive and energetic materials is disclosed. The device is fabricated on a silicon-on-sapphire substrate which has an insulating bridge element defined therein using standard integrated circuit fabrication techniques. Then, a thin layer of tungsten is selectively deposited on the silicon bridge layer using chemical vapor deposition techniques. Finally, conductive lands are deposited on each end of the tungsten bridge layer to form the device. It has been found that this device exhibits substantially shorter ignition times than standard metal bridges and foil igniting devices. In addition, substantially less energy is required to cause ignition of the tungsten bridge device of the present invention than is required for common metal bridges and foil devices used for the same purpose.

  15. Tungsten bridge for the low energy ignition of explosive and energetic materials

    DOE Patents [OSTI]

    Benson, D.A.; Bickes, R.W. Jr.; Blewer, R.S.

    1990-12-11

    A tungsten bridge device for the low energy ignition of explosive and energetic materials is disclosed. The device is fabricated on a silicon-on-sapphire substrate which has an insulating bridge element defined therein using standard integrated circuit fabrication techniques. Then, a thin layer of tungsten is selectively deposited on the silicon bridge layer using chemical vapor deposition techniques. Finally, conductive lands are deposited on each end of the tungsten bridge layer to form the device. It has been found that this device exhibits substantially shorter ignition times than standard metal bridges and foil igniting devices. In addition, substantially less energy is required to cause ignition of the tungsten bridge device of the present invention than is required for common metal bridges and foil devices used for the same purpose. 2 figs.

  16. Tantalum-Tungsten Oxide Thermite Composite Prepared by Sol-Gel Synthesis and Spark Plasma Sintering

    SciTech Connect (OSTI)

    Cervantes, O; Kuntz, J; Gash, A; Munir, Z

    2009-02-13

    Energetic composite powders consisting of sol-gel derived nanostructured tungsten oxide were produced with various amounts of micrometer-scale tantalum fuel metal. Such energetic composite powders were ignition tested and results show that the powders are not sensitive to friction, spark and/or impact ignition. Initial consolidation experiments, using the High Pressure Spark Plasma Sintering (HPSPS) technique, on the sol-gel derived nanostructured tungsten oxide produced samples with higher relative density than can be achieved with commercially available tungsten oxide. The sol-gel derived nanostructured tungsten oxide with immobilized tantalum fuel metal (Ta - WO{sub 3}) energetic composite was consolidated to a density of 9.17 g.cm{sup -3} or 93% relative density. In addition those parts were consolidated without significant pre-reaction of the constituents, thus the sample retained its stored chemical energy.

  17. Molybdenum-copper and tungsten-copper alloys and method of making

    DOE Patents [OSTI]

    Schmidt, F.A.; Verhoeven, J.D.; Gibson, E.D.

    1989-05-23

    Molybdenum-copper and tungsten-copper alloys are prepared by a consumable electrode method in which the electrode consists of a copper matrix with embedded strips of refractory molybdenum or tungsten. The electrode is progressively melted at its lower end with a superatmospheric inert gas pressure maintained around the liquefying electrode. The inert gas pressure is sufficiently above the vapor pressure of copper at the liquidus temperature of the alloy being formed to suppress boiling of liquid copper. 6 figs.

  18. Line spectrum and ion temperature measurements from tungsten ions at low

    Office of Scientific and Technical Information (OSTI)

    ionization stages in large helical device based on vacuum ultraviolet spectroscopy in wavelength range of 500-2200 Å (Journal Article) | SciTech Connect Line spectrum and ion temperature measurements from tungsten ions at low ionization stages in large helical device based on vacuum ultraviolet spectroscopy in wavelength range of 500-2200 Å Citation Details In-Document Search Title: Line spectrum and ion temperature measurements from tungsten ions at low ionization stages in large helical

  19. Molybdenum-copper and tungsten-copper alloys and method of making

    DOE Patents [OSTI]

    Schmidt, Frederick A. (Ames, IA); Verhoeven, John D. (Ames, IA); Gibson, Edwin D. (Ames, IA)

    1989-05-23

    Molybdenum-copper and tungsten-copper alloys are prepared by a consumable electrode method in which the electrode consists of a copper matrix with embedded strips of refractory molybdenum or tungsten. The electrode is progressively melted at its lower end with a superatmospheric inert gas pressure maintained around the liquifying electrode. The inert gas pressure is sufficiently above the vapor pressure of copper at the liquidus temperature of the alloy being formed to suppress boiling of liquid copper.

  20. In situ thermally enhanced biodegradation of petroleum fuel hydrocarbons and halogenated organic solvents

    DOE Patents [OSTI]

    Taylor, R.T.; Jackson, K.J.; Duba, A.G.; Chen, C.I.

    1998-05-19

    An in situ thermally enhanced microbial remediation strategy and a method for the biodegradation of toxic petroleum fuel hydrocarbon and halogenated organic solvent contaminants are described. The method utilizes nonpathogenic, thermophilic bacteria for the thermal biodegradation of toxic and carcinogenic contaminants, such as benzene, toluene, ethylbenzene and xylenes, from fuel leaks and the chlorinated ethenes, such as trichloroethylene, chlorinated ethanes, such as 1,1,1-trichloroethane, and chlorinated methanes, such as chloroform, from past solvent cleaning practices. The method relies on and takes advantage of the pre-existing heated conditions and the array of delivery/recovery wells that are created and in place following primary subsurface contaminant volatilization efforts via thermal approaches, such as dynamic underground steam-electrical heating. 21 figs.

  1. In situ thermally enhanced biodegradation of petroleum fuel hydrocarbons and halogenated organic solvents

    DOE Patents [OSTI]

    Taylor, Robert T.; Jackson, Kenneth J.; Duba, Alfred G.; Chen, Ching-I

    1998-01-01

    An in situ thermally enhanced microbial remediation strategy and a method for the biodegradation of toxic petroleum fuel hydrocarbon and halogenated organic solvent contaminants. The method utilizes nonpathogenic, thermophilic bacteria for the thermal biodegradation of toxic and carcinogenic contaminants, such as benzene, toluene, ethylbenzene and xylenes, from fuel leaks and the chlorinated ethenes, such as trichloroethylene, chlorinated ethanes, such as 1,1,1-trichloroethane, and chlorinated methanes, such as chloroform, from past solvent cleaning practices. The method relies on and takes advantage of the pre-existing heated conditions and the array of delivery/recovery wells that are created and in place following primary subsurface contaminant volatilization efforts via thermal approaches, such as dynamic underground steam-electrical heating.

  2. Tungsten coating for improved wear resistance and reliability of microelectromechanical devices

    DOE Patents [OSTI]

    Fleming, James G. (Albuquerque, NM); Mani, Seethambal S. (Albuquerque, NM); Sniegowski, Jeffry J. (Edgewood, NM); Blewer, Robert S. (Albuquerque, NM)

    2001-01-01

    A process is disclosed whereby a 5-50-nanometer-thick conformal tungsten coating can be formed over exposed semiconductor surfaces (e.g. silicon, germanium or silicon carbide) within a microelectromechanical (MEM) device for improved wear resistance and reliability. The tungsten coating is formed after cleaning the semiconductor surfaces to remove any organic material and oxide film from the surface. A final in situ cleaning step is performed by heating a substrate containing the MEM device to a temperature in the range of 200-600 .degree. C. in the presence of gaseous nitrogen trifluoride (NF.sub.3). The tungsten coating can then be formed by a chemical reaction between the semiconductor surfaces and tungsten hexafluoride (WF.sub.6) at an elevated temperature, preferably about 450.degree. C. The tungsten deposition process is self-limiting and covers all exposed semiconductor surfaces including surfaces in close contact. The present invention can be applied to many different types of MEM devices including microrelays, micromirrors and microengines. Additionally, the tungsten wear-resistant coating of the present invention can be used to enhance the hardness, wear resistance, electrical conductivity, optical reflectivity and chemical inertness of one or more semiconductor surfaces within a MEM device.

  3. Scientists in the Spotlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    development specialist and Nicole Lloyd-Ronning, an astrophysicist, both at Los Alamos National Laboratory will talk to people about computers and the electromagnetic spectrum....

  4. Employee Spotlight: Ann Schlenker

    ScienceCinema (OSTI)

    Ann Schlenker

    2013-06-10

    Ann Schlenker, Director for the Center for Transportation Research, discusses mentoring and working at Argonne.

  5. Scientists in the Spotlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    talking to visitors about their favorite STEM (Science, Technology, Engineering and Math) topics. Featured in December: Teri Roberts and Isaac Salazar Stop by the Bradbury on...

  6. Scientists in the Spotlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    technology, engineering, or math (STEM) subject. Conversations are intended for all ages and include interactive hands-on activities that make learning easy and fun. To learn...

  7. Scientists in the Spotlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    engineering, or math (STEM) subject. These conversations are intended for all ages, so bring your kids and stop by the museum for a chat. While you're here, be sure to...

  8. Scientists in the Spotlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    the science of computer software and hardware. These conversations are intended for all ages and include interactive hands-on activities that make learning more fun. Be sure to...

  9. Scientists in the Spotlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    radiography to learn more about explosives. These conversations are intended for all ages, so bring your kids and stop by the museum for a chat. While you're here, be sure to...

  10. Scientists in the Spotlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    technology, engineering, or math (STEM) subject. Conversations are intended for all ages and include interactive hands-on activities that make learning easy and fun. On...

  11. Scientists in the Spotlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    and are hitting the ground running spreading the word about topics such as sea ice, supernovae, or aquatic biology. These conversations are for ANY age audience, so bring your...

  12. DOE Sustainability SPOtlight

    Broader source: Energy.gov [DOE]

    Newsletter highlights the recipients of the U.S. Department of Energy (DOE) Sustainability Performance Office (SPO) 2014 Sustainability Awards.

  13. Scientist in the Spotlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    live in regional fresh water supplies. You'll also have an opportunity to talk to Jane about her interest in microbiology and see cool stuff normally invisible to the human eye...

  14. Employee Spotlight: Alessandro Cattaneo

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Alessandro Cattaneo Alessandro Cattaneo-One thing leads to another The first time the Laboratory's post-doctoral mechanical engineer Alessandro Cattaneo arrived in the United States from his native Italy, he was a regular tourist taking a road trip through the American West with three Italian friends. April 12, 2015 Alessandro Cattaneo Cattaneo and companions in Millennium Park, Chicago. "Los Alamos' Engineering Institute is considered one of the structural health monitoring leaders in the

  15. Employee Spotlight: Amy Spears

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Amy Spears Amy Spears-Inspired by the "dark place" Amy proved how tough she is on the CMT channel's grueling Broken Skull Challenge. But in everyday life, she's driven to help those around her achieve their fitness goals. spears spears spears spears spears spears 12 3 4 "I'm a mother, but I am also still Amy. I have big goals and dreams and it is so important for me to work towards those while I am raising my kids and, in turn, I think I am a better mom for it." Inspired by

  16. Employee Spotlight: Billy Turney

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Billy Turney Billy Turney-Devotion to song For the last 40-plus years, Billy Turney has been performing live music in churches, pubs, farmers markets, and a dozen other places from Santa Fe to Rome to Dublin. turney turney turney turney turney turney turney 12 3 4 5 6 7 "To understand how Billy Turney came to embrace both sacred music and Irish folk songs, you have to consider two ends of the keyboard continuum: the biggest of all, the pipe organ, and the most portable, the accordion."

  17. Employee Spotlight: Bryant Roybal

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Bryant Roybal Bryant Roybal-Champion chile The Associate Directorate for Project Management's Bryant Roybal has been a chile competition contestant ever since entering the Hot Chili Days, Cool Mountain Nights Cookoff in Red River in 2011 and immediately taking first prize. February 18, 2015 Bryant Roybal Bryant Roybal's award-winning chile stew recipe features different types of chile in what he calls his Harvest Blend. "It's been a fun few years, and winning the inaugural state-wide Green

  18. Employee Spotlight: Dave Keller

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Dave Keller Dave Keller-Sleepless in Los Alamos From the end of March into early May, Keller and the Laboratory's other wildlife biologists monitor the Mexican Spotted Owl's population size and locations and record noteworthy changes. June 2, 2014 Dave Keller Dave Keller works for the Environmental Protection Division's Environmental Stewardship group. It's 2 o'clock in the morning and pitch black. While most Laboratory employees are getting a good night's sleep, wildlife biologist Dave Keller

  19. Employee Spotlight: Jeff Martin

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Jeff Martin Jeff Martin-Going feral Two long-distance solo hikes on the breathtaking Colorado Plateau took Martin into the vicinity of Canyonlands National Park, the Glen Canyon National Recreation Area and Lake Powell martin martin martin martin martin martin martin martin martin 12 3 45 6 789 "There is not much sound down here, just the light crunch of my steps on the canyon floor's natural gravel and the occasional scrape of my pack as it touches the walls." Going feral It usually

  20. Employee Spotlight: Kristen Honig

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Kristen Honig Kristen Honig-The evolution of a wildfire photographer Honig realized that she wanted to document the beauty and destructiveness of wildfires and the sacrifices, challenges and camaraderie of the men and women protecting communities in the path of scorching blazes. June 24, 2014 Helicopter releasing red fire retardant A helicopter drops fire retardant on wildfire during 2011 Las Conchas fire in New Mexico. ...the crews think of me as 'press,' someone who is going to take a few

  1. Employee Spotlight: Monika Bittman

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Monika Bittman Monika Bittman-The vitality of artistic creation Monika Bittman has wanted to be an artist ever since she was a little girl in Prague, Czechoslovakia, now the Czech Republic. Today Bittman applies her creative eye and attention to detail in her work as a web designer at the Laboratory. June 2, 2014 Monika Bittman Monika Bittman, web designer/developer "By working with thin paint on small panels, moving them around and manipulating them, I allow the properties and dynamics of

  2. Employee Spotlight: Ron Barber

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Ron Barber Ron Barber-The hobby that got out of hand Ron Barber, a mechanical engineer in the Laboratory's Accelerator Operations and Technology Division, combines his love of nature and open spaces with a personal interest in researching the astronomical knowledge of long-ago civilizations that once inhabited the American Southwest. September 9, 2014 Ron Barber The ancient stone calendars Ron Barber and his friends have located during their weekend treks mark summer and winter solstices,

  3. Employee Spotlight: Michael Torrez

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    that I had never felt before, and I want to help others feel the same sense of self- empowerment and joy." Torrez works for the Materials Physics and Applications Division's...

  4. Scientists in the Spotlight

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    informative, but fun too On Saturday, June 13 from 11:00 AM to 1:00 PM, Teri Roberts, a software quality engineering and development specialist and Mandie Gehring, a physicist,...

  5. Employee Spotlight: Alessandro Cattaneo

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Alessandro Cattaneo April 12, 2015 One thing leads to another The first time the Laboratory's post-doctoral mechanical engineer Alessandro Cattaneo arrived in the United States from his native Italy, he was a regular tourist taking a road trip through the American West with three Italian friends in August 2007. The four returned the following summer with four more friends from Italy to see a larger chunk of the country, but this time renting two cars instead of just one and traveling from coast

  6. Employee Spotlight: Bryant Roybal

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Bryant Roybal February 18, 2015 Champion chile New Mexico's first green chile stew champion, Bryant Roybal, is proud to add first prize at the First Annual Great Bowls of Fire Chili Cookoff on February 14, 2015, to his growing list of awards for his chile recipes. Roybal, who works for the Laboratory's Associate Directorate for Project Management, has been a chile competition contestant ever since entering the Hot Chili Days, Cool Mountain Nights Cookoff in Red River in 2011 and immediately

  7. Employee Spotlight: Dave Keller

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Dave Keller June 2, 2014 It's 2 o'clock in the morning and pitch black. While most Laboratory employees are getting a good night's sleep, wildlife biologist Dave Keller and a colleague are up and about, stopping by the Environmental Protection Division's office in White Rock to pick up a four-wheel-drive government vehicle and head out to look for Mexican Spotted Owls, a federally listed threatened species living on Laboratory property. By the time Keller and his travel partner reach the first

  8. Employee Spotlight: Janice Lovato

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Janice Lovato March 10, 2015 A gift for imagination While the Associate Directorate for Nuclear and High Hazard Operations' Janice Lovato was still working as a cashier at Smith's Food and Drug Center in Los Alamos over a decade ago, a regular, usually friendly customer came through her line one day, but this time in an obviously disgruntled mood. As the shopper slowly placed his purchases on the cash register counter, he looked at Lovato in exasperation and told her that standing at the cash

  9. Employee Spotlight: Kristen Honig

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Kristen Honig June 24, 2014 In early May 2000, Kristen Honig, nowadays an infrastructure planner for the Laboratory, was studying for college exams as the Cerro Grande Fire threatened her hometown of Los Alamos 350 miles away. After the fire had been successfully contained, she attended a firefighter appreciation event at Ashley Pond and met some of the firefighters who had battled the blaze. The relationships Honig formed that day, and the insights she gained into the firefighting way of life,

  10. Employee Spotlight: Michelle Ferran

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Division. Photos of Michelle Ferran courtesy of Louis Leray. Photos of Michelle Ferran's art courtesy of Patrick Carr. Resource Ferran Fine Arts (Ferran's website) Disclaimer: The...

  11. Employee Spotlight: James Hunter

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    are even more noteworthy among cave explorers and rock climbers in general. "The art of cave climbing is a special skill in the caving community," Hunter says, "and...

  12. Spotlight: Claudia Mora

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    is a stable-isotope geochemist whose research spans the traditional fields of geology, soil science and climate science. At Los Alamos, she heads the Earth and Environmental...

  13. Employee Spotlight: Jason Halladay

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    required by Cotopaxi National Park for safety reasons. halladay Aron Ralston, Elliott Larson and Jason Halladay during a reconnaissance hike on Cotopaxi the previous day. "It's a...

  14. Employee Spotlight: Jonathan Engle

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Jonathan Engle August 14, 2014 "You have cancer" are among the most feared words one can imagine hearing from one's physician, but if Jonathan (Jon) Engle, Reines Distinguished...

  15. Employee Spotlight: Jonathan Engle

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    at the Laboratory, is helping lay the scientific groundwork for a new and improved cancer treatment that uses the energy produced by radioactive isotopes. August 14, 2014 Jon...

  16. Employee Spotlight: Michael Torrez

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    other modern-day Espinosas. "After working on my own genealogy," Torrez says, "I felt a sense of belonging that I had never felt before, and I want to help others feel the same...

  17. Employee Spotlight: Ron Barber

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Barber and his core team-about a dozen men and a couple of women-often hike, raft, kayak or climb long distances to reach the stone calendars in remote parts and in the...

  18. Spotlight: Christopher Lee

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Under the program, researchers based at DOE national laboratories will receive financial ... strength and leadership of the nuclear theory group and the Laboratory as a whole, to ...

  19. Employee Spotlight: Monika Bittman

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Republic. Today Bittman applies her creative eye and attention to detail in her work as a web designer at the Laboratory and on weekends spends as much time as possible painting in...

  20. Reduced ternary molybdenum and tungsten sulfides and hydroprocessing catalysis therewith

    DOE Patents [OSTI]

    Hilsenbeck, Shane J. (Ames, IA); McCarley, Robert E. (Ames, IA); Schrader, Glenn L. (Ames, IA); Xie, Xiaobing (College Station, TX)

    1999-02-16

    New amorphous molybdenum/tungsten sulfides with the general formula M.sup.n+.sub.2x/n (L.sub.6 S.sub.8)S.sub.x, where L is molybdenum or tungsten and M is a ternary metal, has been developed. Characterization of these amorphous materials by chemical and spectroscopic methods (IR, Raman, PES) shows that the (M.sub.6 S.sub.8).sup.0 cluster units are present. Vacuum thermolysis of the amorphous Na.sub.2x (Mo.sub.6 S.sub.8)S.sub.x .multidot.yMeOH first produces poorly crystalline NaMo.sub.6 S.sub.8 by disproportionation at 800.degree. C. and well-crystallized NaMo.sub.6 S.sub.8 at .gtoreq. 900.degree. C. Ion-exchange of the sodium material in methanol with soluble M.sup.2+ and M.sup.3+ salts (M=Sn, Co, Ni, Pb, La, Ho) produces the M.sup.n+.sub.2x/n (Mo.sub.6 S.sub.8)S.sub.x .multidot.yMeOH compounds. Additionally, the new reduced ternary molybdenum sulfides with the general formula M.sup.n+.sub.2x/n Mo.sub.6 S.sub.8+x (MeOH).sub.y MMOS! (M=Sn, Co, Ni) is an effective hydrodesulfurization (HDS) catalyst both as-prepared and after a variety of pretreatment conditions. Under specified pretreatment conditions with flowing hydrogen gas, the SnMoS type catalyst can be stabilized, and while still amorphous, can be considered as "Chevrel phase-like" in that both contain Mo.sub.6 S.sub.8 cluster units. Furthermore, the small cation NiMoS and CoMoS type pretreated catalyst showed to be very active HDS catalysts with rates that exceeded the model unpromoted and cobalt-promoted MoS.sub.2 catalysts.

  1. Reduced ternary molybdenum and tungsten sulfides and hydroprocessing catalysis therewith

    DOE Patents [OSTI]

    Hilsenbeck, S.J.; McCarley, R.E.; Schrader, G.L.; Xie, X.B.

    1999-02-16

    New amorphous molybdenum/tungsten sulfides with the general formula M{sup n+}{sub 2x/n}(L{sub 6}S{sub 8})S{sub x}, where L is molybdenum or tungsten and M is a ternary metal, has been developed. Characterization of these amorphous materials by chemical and spectroscopic methods (IR, Raman, PES) shows that the (M{sub 6}S{sub 8}){sup 0} cluster units are present. Vacuum thermolysis of the amorphous Na{sub 2x}(Mo{sub 6}S{sub 8})S{sub x}{hor_ellipsis}yMeOH first produces poorly crystalline NaMo{sub 6}S{sub 8} by disproportionation at 800 C and well-crystallized NaMo{sub 6}S{sub 8} at {>=} 900 C. Ion-exchange of the sodium material in methanol with soluble M{sup 2+} and M{sup 3+} salts (M=Sn, Co, Ni, Pb, La, Ho) produces the M{sup n+}{sub 2x/n}(Mo{sub 6}S{sub 8})S{sub x}{hor_ellipsis}yMeOH compounds. Additionally, the new reduced ternary molybdenum sulfides with the general formula M{sup n+}{sub 2x/n}Mo{sub 6}S{sub 8+x}(MeOH){sub y}[MMOS] (M=Sn, Co, Ni) is an effective hydrodesulfurization (HDS) catalyst both as-prepared and after a variety of pretreatment conditions. Under specified pretreatment conditions with flowing hydrogen gas, the SnMoS type catalyst can be stabilized, and while still amorphous, can be considered as ``Chevrel phase-like`` in that both contain Mo{sub 6}S{sub 8} cluster units. Furthermore, the small cation NiMoS and CoMoS type pretreated catalyst is shown to be very active HDS catalysts with rates that exceeded the model unpromoted and cobalt-promoted MoS{sub 2} catalysts. 9 figs.

  2. Adsorption of carbonyl sulfide on nickel and tungsten films

    SciTech Connect (OSTI)

    Saleh, J.M.; Nasser, F.A.K.

    1985-07-18

    The interaction of carbonyl sulfide with evaporated nickel and tungsten films has been investigated in the temperature range 195-450 K using gas pressures ranging from 1 to 13 N m/sup -2/. Rapid but mainly associative chemisorption of COS occurred on both metals at 195 K. Further adsorption of COS on W at temperatures 293-450 K was extremely slow and accompanied by more CO desorption than COS adsorbed. Sulfidation of Ni film by COS occurred at temperatures greater than or equal to 293 K with the liberation of carbon monoxide. The rate of adsorption increased with temperature but was independent of COS pressure. The activation energy (E/sub x/) increased with extent (X) of sulfidation to a limiting value of 97 kJ mol/sup -1/. A linear relationship was obtained from the plot of E/sub x/ against 1/X, suggesting the applicability of Cabrera-Mott theory to the sulfidation of Ni film by COS. 20 references, 2 figures, 1 table.

  3. Activation Energy of Tantalum-Tungsten Oxide Thermite Reaction

    SciTech Connect (OSTI)

    Cervantes, O; Kuntz, J; Gash, A; Munir, Z

    2010-02-25

    The activation energy of a high melting temperature sol-gel (SG) derived tantalum-tungsten oxide thermite composite was determined using the Kissinger isoconversion method. The SG derived powder was consolidated using the High Pressure Spark Plasma Sintering (HPSPS) technique to 300 and 400 C to produce pellets with dimensions of 5 mm diameter by 1.5 mm height. A custom built ignition setup was developed to measure ignition temperatures at high heating rates (500-2000 C {center_dot} min{sup -1}). Such heating rates were required in order to ignite the thermite composite. Unlike the 400 C samples, results show that the samples consolidated to 300 C undergo an abrupt change in temperature response prior to ignition. This change in temperature response has been attributed to the crystallization of the amorphous WO{sub 3} in the SG derived Ta-WO{sub 3} thermite composite and not to a pre-ignition reaction between the constituents. Ignition temperatures for the Ta-WO{sub 3} thermite ranged from approximately 465-670 C. The activation energy of the SG derived Ta-WO{sup 3} thermite composite consolidated to 300 and 400 C were determined to be 37.787 {+-} 1.58 kJ {center_dot} mol{sup -1} and 57.381 {+-} 2.26 kJ {center_dot} mol{sup -1}, respectively.

  4. Effect of interfacial interactions on the thermal conductivity and interfacial thermal conductance in tungstengraphene layered structure

    SciTech Connect (OSTI)

    Jagannadham, K.

    2014-09-01

    Graphene film was deposited by microwave plasma assisted deposition on polished oxygen free high conductivity copper foils. Tungstengraphene layered film was formed by deposition of tungsten film by magnetron sputtering on the graphene covered copper foils. Tungsten film was also deposited directly on copper foil without graphene as the intermediate film. The tungstengraphenecopper samples were heated at different temperatures up to 900?C in argon atmosphere to form an interfacial tungsten carbide film. Tungsten film deposited on thicker graphene platelets dispersed on silicon wafer was also heated at 900?C to identify the formation of tungsten carbide film by reaction of tungsten with graphene platelets. The films were characterized by scanning electron microscopy, Raman spectroscopy, and x-ray diffraction. It was found that tungsten carbide film formed at the interface upon heating only above 650?C. Transient thermoreflectance signal from the tungsten film surface on the samples was collected and modeled using one-dimensional heat equation. The experimental and modeled results showed that the presence of graphene at the interface reduced the cross-plane effective thermal conductivity and the interfacial thermal conductance of the layer structure. Heating at 650 and 900?C in argon further reduced the cross-plane thermal conductivity and interface thermal conductance as a result of formation nanocrystalline tungsten carbide at the interface leading to separation and formation of voids. The present results emphasize that interfacial interactions between graphene and carbide forming bcc and hcp elements will reduce the cross-plane effective thermal conductivity in composites.

  5. Observation of two distinct negative trions in tungsten disulfide monolayers

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Boulesbaa, Abdelaziz; Huang, Bing; Wang, Kai; Lin, Ming-Wei; Mahjouri-Samani, Masoud; Rouleau, Christopher M.; Xiao, Kai; Yoon, Mina; Sumpter, Bobby G.; Puretzky, Alexander A.; et al

    2015-09-25

    We report on the observation of two distinct photogenerated negative trion states TA and TB in two-dimensional tungsten disulfide (2D-WS2) monolayers. These trions are postulated to emerge from their parent excitons XA and XB, which originate from spin-orbit-split (SOS) levels in the conduction band (CB) and valence band (VB). Time-resolved spectroscopy measurements suggests that Pauli blocking controls a competition process between TA and TB photoformation, following dissociation of XA and XB through hole trapping at internal or substrate defect sites. While TA arises directly from its parent XA, TB emerges through a different transition accessible only after XB dissociates throughmore » a hole trapping channel. This discovery of additional optically-active band-edge transitions in atomically-thin metal dichalcogenides may revolutionize optoelectronic applications and fundamental research opportunities for many-body interaction physics. Ultrafast pump-probe spectroscopy of two-dimensional tungsten disulfide monolayers (2D-WS2) grown on sapphire substrates revealed two transient absorption spectral peaks that are attributed to distinct negative trions at ~2.02 eV (T1) and ~1.98 eV (T2). The dynamics measurements indicate that trion formation by the probe is enabled by photodoped electrons that remain after trapping of holes from excitons or free electron-hole pairs at defect sites in the crystal or on the substrate. Dynamics of the excitons XA and XB’s characteristic absorption bands, at ~2.03 and ~2.40 eV, respectively, were separately monitored and compared with the photoinduced absorption features. Selective excitation of the lowest exciton level XA using λpump < 2.4 eV forms only trion T1, which implies that the electron that remains from the dissociation of exciton XA is involved in the creation of this trion with a binding energy ~ 10 meV with respect to XA. The absorption peak that corresponds to trion T2 appears when λpump > 2.4 eV, which is just sufficient to excite exciton XB. The dynamics of trion T2 formation are found to correlate with the disappearance of the bleach of XB exciton, which indicates the involvement of holes participating in the bleach dynamics of exciton XB. Static electrical-doping photoabsorption measurements confirm the presence of an induced absorption peak similar to that of T2. Since the proposed trion formation process here involves exciton dissociation through hole-trapping by defects in the 2D crystal or substrate, this discovery highlights the strong role that defects have in defining the optical and electrical properties of 2D metal chalcogenides, which is relevant to a broad spectrum of basic science and technology applications.« less

  6. Observation of two distinct negative trions in tungsten disulfide monolayers

    SciTech Connect (OSTI)

    Boulesbaa, Abdelaziz; Huang, Bing; Wang, Kai; Lin, Ming-Wei; Mahjouri-Samani, Masoud; Rouleau, Christopher M.; Xiao, Kai; Yoon, Mina; Sumpter, Bobby G.; Puretzky, Alexander A.; Geohegan, David B.

    2015-09-25

    We report on the observation of two distinct photogenerated negative trion states TA and TB in two-dimensional tungsten disulfide (2D-WS2) monolayers. These trions are postulated to emerge from their parent excitons XA and XB, which originate from spin-orbit-split (SOS) levels in the conduction band (CB) and valence band (VB). Time-resolved spectroscopy measurements suggests that Pauli blocking controls a competition process between TA and TB photoformation, following dissociation of XA and XB through hole trapping at internal or substrate defect sites. While TA arises directly from its parent XA, TB emerges through a different transition accessible only after XB dissociates through a hole trapping channel. This discovery of additional optically-active band-edge transitions in atomically-thin metal dichalcogenides may revolutionize optoelectronic applications and fundamental research opportunities for many-body interaction physics. Ultrafast pump-probe spectroscopy of two-dimensional tungsten disulfide monolayers (2D-WS2) grown on sapphire substrates revealed two transient absorption spectral peaks that are attributed to distinct negative trions at ~2.02 eV (T1) and ~1.98 eV (T2). The dynamics measurements indicate that trion formation by the probe is enabled by photodoped electrons that remain after trapping of holes from excitons or free electron-hole pairs at defect sites in the crystal or on the substrate. Dynamics of the excitons XA and XBs characteristic absorption bands, at ~2.03 and ~2.40 eV, respectively, were separately monitored and compared with the photoinduced absorption features. Selective excitation of the lowest exciton level XA using ?pump < 2.4 eV forms only trion T1, which implies that the electron that remains from the dissociation of exciton XA is involved in the creation of this trion with a binding energy ~ 10 meV with respect to XA. The absorption peak that corresponds to trion T2 appears when ?pump > 2.4 eV, which is just sufficient to excite exciton XB. The dynamics of trion T2 formation are found to correlate with the disappearance of the bleach of XB exciton, which indicates the involvement of holes participating in the bleach dynamics of exciton XB. Static electrical-doping photoabsorption measurements confirm the presence of an induced absorption peak similar to that of T2. Since the proposed trion formation process here involves exciton dissociation through hole-trapping by defects in the 2D crystal or substrate, this discovery highlights the strong role that defects have in defining the optical and electrical properties of 2D metal chalcogenides, which is relevant to a broad spectrum of basic science and technology applications.

  7. Nanoparticles synthesis of tungsten disulfide via AOT-based microemulsions

    SciTech Connect (OSTI)

    Ghoreishi, S.M.; Meshkat, S.S.; Department of Chemical Engineering, Urmia University of Technology, Urmia 57155-419 ; Ghiaci, M.; Dadkhah, A.A.

    2012-06-15

    Graphical abstract: A controlled synthesis of WS2 nanoparticles (most probably inorganic fullerene (IF)) via microemulsion was applied for the first time to prepare WS2 (712 nm) by acidification of the water cores of the AOT reverse microemulsion. Highlights: ? An innovative reverse microemulsion technique was developed for WS{sub 2} synthesis. ? WS{sub 2} nanoparticles were obtained with narrow size distribution in range of 712 nm. ? Operating cost of microemulsion was lower in contrast to quartz reactor method. ? WS{sub 2} morphology could be controlled to obtain highly active and selective catalysts. ? Lower size of WS{sub 2} in this study overcomes the shortcoming of quartz reactor method. -- Abstract: The tungsten disulfide (WS{sub 2}) nanoparticles (most probably inorganic fullerene (IF)) with a narrow size distribution were synthesized by a reverse micelle technique for the first time. The particle size was controlled by varying water-to-surfactant molar ratio (W{sub 0}), aging time and reagent concentration. The synthesized WS{sub 2} nanoparticles were characterized by zetasizer, UVvisible spectrophotometers and transmission electron microscopy (TEM). The WS{sub 2} nanoparticles with particle diameter size of 712 nm were obtained via 24 h aging time. The particle size was controlled by changing the aging time and molar ratio of water/surfactant. Doubling W{sub 0} increased the amount and particle size of WS{sub 2} by 22 and 26%, respectively. The effect of aging time in the range of 624 h was investigated and the complete disappearance of yellowish color at 24 h resulted in an optically clear solution, which was the indication of WS{sub 2} formation with 100% conversion of reactant ((NH{sub 4}){sub 2}WS{sub 4}) in the batch reactor.

  8. Tungsten impurity transport experiments in Alcator C-Mod to address high

    Office of Scientific and Technical Information (OSTI)

    priority research and development for ITER (Journal Article) | SciTech Connect Tungsten impurity transport experiments in Alcator C-Mod to address high priority research and development for ITER Citation Details In-Document Search Title: Tungsten impurity transport experiments in Alcator C-Mod to address high priority research and development for ITER Experiments in Alcator C-Mod tokamak plasmas in the Enhanced D-alpha H-mode regime with ITER-like mid-radius plasma density peaking and Ion

  9. Nanostructured tungsten carbide/cobalt alloys: Processing and properties

    SciTech Connect (OSTI)

    Wu, Li

    1993-12-31

    This research represents an extension of previous work on the synthesis and processing of nanostructured WC/Co alloys. The earlier work resulted in a novel thermochemical process for making nanostructured WC/Co powders (3-30 wt% Co), which involved the reductive decomposition and gas phase carburization of homogeneous precursor powders, prepared by spray drying aqueous solution mixtures of W and Co salts. A shortcoming of the process was the formation of a relatively large amount of uncombined carbon during gas phase carburization using pre CO. AnOtherr unsolved problem was the rapid coarsening of WC particles during liquid phase sintering, making it difficult to achieve the desired nanostructures in the fully consolidated materials. In the present work, both problems have been addressed and successfully overcome. Carburization in CO/H{sub 2} gas mixtures has been shown to be superior to carburization in pure CO, in that it avoids the formation of excess carbon without sacrificing the desirable high carburization rate. Another advantage is the finer WC grain size achieved, because of the shorter reaction time at relatively low temperatures, 650-750{degrees}C. Othe carbon source gases, such as CH{sub 4}/H{sub 2} and C{sub 2}H{sub 4}/H{sub 2} gas mixtures, cannot produce tungsten monocarbide at such low temperatures. Thus, carburization in CO/H{sub 2} gas mixtures appears to be optimal for synthesizing nanostructured WC/Co powders. As to liquid phase sintering of powder compacts, it has been demonstrated that mechanical mixing of a small amount of VC powder with the nanograined WC/Co powder inhibits grain growth. A striking result was the linear increase in hardness of WC/7 wt% Co with the amount of VC added, at least up to the solubility limit (about 10 wt%) of VC in liquid cobalt at the sintering temperature. Preliminary work has also demonstrated the feasibility of plasma spraying low-density nanostructured powders to produce dense, wear resistant coatings.

  10. Utilization of geothermal energy in the mining and processing of tungsten ore. Final report

    SciTech Connect (OSTI)

    Erickson, M.V.; Lacy, S.B.; Lowe, G.D.; Nussbaum, A.M.; Walter, K.M.; Willens, C.A.

    1981-01-01

    The engineering, economic, and environmental feasibility of the use of low and moderate temperature geothermal heat in the mining and processing of tungsten ore is explored. The following are covered: general engineering evaluation, design of a geothermal energy system, economics, the geothermal resource, the institutional barriers assessment, environmental factors, an alternate geothermal energy source, and alternates to geothermal development. (MHR)

  11. Biomass-derived high-performance tungsten-based electrocatalysts on graphene for hydrogen evolution

    SciTech Connect (OSTI)

    Meng, Fanke; Hu, Enyuan; Zhang, Lihua; Sasaki, Kotaro; Muckerman, James T.; Fujita, Etsuko

    2015-08-05

    We report a new class of highly active and stable tungsten-based catalysts to replace noble metal materials for the hydrogen evolution reaction (HER) in an acidic electrolyte. The catalyst is produced by heating an earth-abundant and low-cost mixture of ammonium tungstate, soybean powder and graphene nanoplatelets (WSoyGnP). The catalyst compound consists of tungsten carbide (W?C and WC) and tungsten nitride (WN) nanoparticles decorated on graphene nanoplatelets. The catalyst demonstrates an overpotential (???, the potential at a current density of 10 mA cm?) of 0.105 V, which is the smallest among tungsten-based HER catalysts in acidic media. The coupling with graphene significantly reduces the charge transfer resistance and increases the active surface area of the product, which are favorable for enhancing the HER activity. Therefore, the approach of employing biomass and other less expensive materials as precursors for the production of catalysts with high HER activity provides a new path for the design and development of efficient catalysts for the hydrogen production industry.

  12. Biomass-derived high-performance tungsten-based electrocatalysts on graphene for hydrogen evolution

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Meng, Fanke; Hu, Enyuan; Zhang, Lihua; Sasaki, Kotaro; Muckerman, James T.; Fujita, Etsuko

    2015-08-05

    We report a new class of highly active and stable tungsten-based catalysts to replace noble metal materials for the hydrogen evolution reaction (HER) in an acidic electrolyte. The catalyst is produced by heating an earth-abundant and low-cost mixture of ammonium tungstate, soybean powder and graphene nanoplatelets (WSoyGnP). The catalyst compound consists of tungsten carbide (W₂C and WC) and tungsten nitride (WN) nanoparticles decorated on graphene nanoplatelets. The catalyst demonstrates an overpotential (η₁₀, the potential at a current density of 10 mA cm⁻²) of 0.105 V, which is the smallest among tungsten-based HER catalysts in acidic media. The coupling with graphenemore » significantly reduces the charge transfer resistance and increases the active surface area of the product, which are favorable for enhancing the HER activity. Therefore, the approach of employing biomass and other less expensive materials as precursors for the production of catalysts with high HER activity provides a new path for the design and development of efficient catalysts for the hydrogen production industry.« less

  13. Defect annealing and thermal desorption of deuterium in low dose HFIR neutron-irradiated tungsten

    SciTech Connect (OSTI)

    Masashi Shimada; M. Hara; T. Otsuka; Y. Oya; Y. Hatano

    2014-05-01

    Accurately estimating tritium retention in plasma facing components (PFCs) and minimizing its uncertainty are key safety issues for licensing future fusion power reactors. D-T fusion reactions produce 14.1 MeV neutrons that activate PFCs and create radiation defects throughout the bulk of the material of these components. Recent studies show that tritium migrates and is trapped in bulk (>> 10 m) tungsten beyond the detection range of nuclear reaction analysis technique [1-2], and thermal desorption spectroscopy (TDS) technique becomes the only established diagnostic that can reveal hydrogen isotope behavior in in bulk (>> 10 m) tungsten. Radiation damage and its recovery mechanisms in neutron-irradiated tungsten are still poorly understood, and neutron-irradiation data of tungsten is very limited. In this paper, systematic investigations with repeated plasma exposures and thermal desorption are performed to study defect annealing and thermal desorption of deuterium in low dose neutron-irradiated tungsten. Three tungsten samples (99.99 at. % purity from A.L.M.T. Co., Japan) irradiated at High Flux Isotope Reactor at Oak Ridge National Laboratory were exposed to high flux (ion flux of (0.5-1.0)x1022 m-2s-1 and ion fluence of 1x1026 m-2) deuterium plasma at three different temperatures (100, 200, and 500 C) in Tritium Plasma Experiment at Idaho National Laboratory. Subsequently, thermal desorption spectroscopy (TDS) was performed with a ramp rate of 10 C/min up to 900 C, and the samples were annealed at 900 C for 0.5 hour. These procedures were repeated three (for 100 and 200 C samples) and four (for 500 C sample) times to uncover damage recovery mechanisms and its effects on deuterium behavior. The results show that deuterium retention decreases approximately 90, 75, and 66 % for 100, 200, and 500 C, respectively after each annealing. When subjected to the same TDS recipe, the desorption temperature shifts from 800 C to 600 C after 1st annealing for the sample exposed to TPE at 500 C. Tritium Migration Analysis Program (TMAP) analysis reveals that the detrapping energy decreases from 1.8 eV to 1.4 eV, indicating the changes in trapping mechanisms. This paper also summarizes deuterium behavior studies in HFIR neutron-irradiated tungsten under US-Japan TITAN program.

  14. Separation of toxic metal ions, hydrophilic hydrocarbons, hydrophobic fuel and halogenated hydrocarbons and recovery of ethanol from a process stream

    DOE Patents [OSTI]

    Kansa, Edward J. (Livermore, CA); Anderson, Brian L. (Lodi, CA); Wijesinghe, Ananda M. (Tracy, CA); Viani, Brian E. (Oakland, CA)

    1999-01-01

    This invention provides a process to tremendously reduce the bulk volume of contaminants obtained from an effluent stream produced subsurface remediation. The chemicals used for the subsurface remediation are reclaimed for recycling to the remediation process. Additional reductions in contaminant bulk volume are achieved by the ultra-violet light destruction of halogenated hydrocarbons, and the complete oxidation of hydrophobic fuel hydrocarbons and hydrophilic hydrocarbons. The contaminated bulk volume will arise primarily from the disposal of the toxic metal ions. The entire process is modular, so if there are any technological breakthroughs in one or more of the component process modules, such modules can be readily replaced.

  15. Separation of toxic metal ions, hydrophilic hydrocarbons, hydrophobic fuel and halogenated hydrocarbons and recovery of ethanol from a process stream

    DOE Patents [OSTI]

    Kansa, E.J.; Anderson, B.L.; Wijesinghe, A.M.; Viani, B.E.

    1999-05-25

    This invention provides a process to tremendously reduce the bulk volume of contaminants obtained from an effluent stream produced subsurface remediation. The chemicals used for the subsurface remediation are reclaimed for recycling to the remediation process. Additional reductions in contaminant bulk volume are achieved by the ultra-violet light destruction of halogenated hydrocarbons, and the complete oxidation of hydrophobic fuel hydrocarbons and hydrophilic hydrocarbons. The contaminated bulk volume will arise primarily from the disposal of the toxic metal ions. The entire process is modular, so if there are any technological breakthroughs in one or more of the component process modules, such modules can be readily replaced. 3 figs.

  16. GENERATION, TRANSPORT AND DEPOSITION OF TUNGSTEN-OXIDE AEROSOLS AT 1000 C IN FLOWING AIR-STEAM MIXTURES.

    SciTech Connect (OSTI)

    GREENE,G.A.; FINFROCK,C.C.

    2001-10-01

    Experiments were conducted to measure the rates of oxidation and vaporization of pure tungsten rods in flowing air, steam and air-steam mixtures in laminar flow. Also measured were the downstream transport of tungsten-oxide condensation aerosols and their region of deposition, including plateout in the superheated flow tube, rainout in the condenser and ambient discharge which was collected on an array of sub-micron aerosol filters. The nominal conditions of the tests, with the exception of the first two tests, were tungsten temperatures of 1000 C, gas mixture temperatures of 200 C and wall temperatures of 150 C to 200 C. It was observed that the tungsten oxidation rates were greatest in all air and least in all steam, generally decreasing non-linearly with increasing steam mole fraction. The tungsten oxidation rates in all air were more than five times greater than the tungsten oxidation rates in all steam. The tungsten vaporization rate was zero in all air and increased with increasing steam mole fraction. The vaporization rate became maximum at a steam mole fraction of 0.85 and decreased thereafter as the steam mole fraction was increased to unity. The tungsten-oxide was transported downstream as condensation aerosols, initially flowing upwards from the tungsten rod through an 18-inch long, one-inch diameter quartz tube, around a 3.5-inch radius, 90{sup o} bend and laterally through a 24-inch horizontal run. The entire length of the quartz glass flow path was heated by electrical resistance clamshell heaters whose temperatures were individually controlled and measured. The tungsten-oxide plateout in the quartz tube was collected, nearly all of which was deposited at the end of the heated zone near the entrance to the condenser which was cold. The tungsten-oxide which rained out in the condenser as the steam condensed was collected with the condensate and weighed after being dried. The aerosol smoke which escaped the condenser was collected on the sub-micron filter assemblies. There was no aerosol generation for the case of all air, so the plateout, condensate and smoke were all zero. For the case of all steam, there was very little plateout in the superheated regions (several percent) and the rest of the aerosol was collected in the condensate from the condenser. There was no smoke discharge into the filters. For the experiments with intermediate air-steam fractions, there was some aerosol plateout, considerable aerosol in the condensate and aerosol smoke discharged from the condenser with the escaping air.

  17. TUNGSTEN SHIELDS FOR CS-137 INLINE MONITORS IN THE CAUSTIC SIDE SOLVENT EXTRACTION PROCESS

    SciTech Connect (OSTI)

    Casella, V; Mark Hogue, M; Javier Reyes-Jimenez, J; Paul Filpus-Luyckx, P; Timothy Riley, T; Fred Ogden, F; Donald Pak, D

    2007-05-10

    The Department of Energy (DOE) selected Caustic-Side Solvent Extraction (CSSX) as the preferred technology for the removal of radioactive cesium from High-Level Waste (HLW) at the Savannah River Site (SRS). The CSSX process is a continuous process that uses a novel solvent to extract cesium from highly radioactive waste and concentrate it in dilute nitric acid. In-line analyses are performed with gamma-ray monitors to measure the C-137 concentration in the decontaminated salt solution (DSS) and in the strip effluent (SE). Sodium iodide (NaI) monitors are used to measure the Cs-137 concentration before the DSS Hold Tank, while Geiger-Mueller (GM) monitors are used for Cs-137 measurements before the SE hold tank. Tungsten shields were designed using Monte Carlo calculations and fabricated to provide the needed reduction of the process background radiation at the detector positions. A one-inch tungsten cylindrical shield reduced the background radiation by a factor of fifty that was adequate for the GM detectors, while a three-and-one-half-inch tungsten cylindrical shield was required for the NaI detectors. Testing of the NaI shield was performed at the SRS Instrument Calibration Facility. Based on this testing, the as-built shield is predicted to be able to detect the MCU DSS stream at concentrations above 0.003 Ci/gal under the ''worst case'' field conditions with a MCU feed solution of 1.1 Ci/gal and all of the process tanks completely full. This paper discusses the design, fabrication, testing and implementation of the tungsten shields in the MCU facility.

  18. Control of Gas Tungsten Arc welding pool shape by trace element addition to the weld pool

    DOE Patents [OSTI]

    Heiple, C.R.; Burgardt, P.

    1984-03-13

    An improved process for Gas Tungsten Arc welding maximizes the depth/width ratio of the weld pool by adding a sufficient amount of a surface active element to insure inward fluid flow, resulting in deep, narrow welds. The process is especially useful to eliminate variable weld penetration and shape in GTA welding of steels and stainless steels, particularly by using a sulfur-doped weld wire in a cold wire feed technique.

  19. Dependence of dynamic fracture resistance on crack velocity in tungsten: Pt. II. Bicrystals and polycrystals

    SciTech Connect (OSTI)

    Liv, J.M.; Shen, B.W.

    1986-06-01

    The experimental techniques for crack velocity measurements have been applied to bicrystals of tungsten with twist orientations about (100) and polycrystals. The hesitation of the propagating cleavage crack in the vicinity of the grain boundary is examined. The contributions to energy dissipation from deformation and fracture processes in the grain boundary region as well as the in direct effects of crack deceleration are discussed. These findings have been applied to explain th dynamic fracture resistance and crack arrest in polycrystals.

  20. Dependence of dynamic fracture resistance on crack velocity in tungsten: Pt. 1. Single crystals

    SciTech Connect (OSTI)

    Liv, J.M.; Shen, B.W.

    1984-06-01

    The dependence of dynamic fracture resistance on crack propagation velocity on (100) in tungsten has been examined. A correlation is obtained between the measured local crack velocity with the surfac and subsurface deformations. Based on the experimental results on one pass, two passes, and prestrained, electron beam zone refined single crystals, a discussion is given on the slip modes activated at the crack tip, the contributions to the dynamic fracture resistance from dislocations and surface features and from the preexisting deformed microstructure.

  1. Defect evolution in single crystalline tungsten following low temperature and low dose neutron irradiation

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Hu, Xunxiang; Koyanagi, Takaaki; Fukuda, Makoto; Katoh, Yutai; Wirth, Brian D; Snead, Lance Lewis

    2016-01-01

    The tungsten plasma-facing components of fusion reactors will experience an extreme environment including high temperature, intense particle fluxes of gas atoms, high-energy neutron irradiation, and significant cyclic stress loading. Irradiation-induced defect accumulation resulting in severe thermo-mechanical property degradation is expected. For this reason, and because of the lack of relevant fusion neutron sources, the fundamentals of tungsten radiation damage must be understood through coordinated mixed-spectrum fission reactor irradiation experiments and modeling. In this study, high-purity (110) single-crystal tungsten was examined by positron annihilation spectroscopy and transmission electron microscopy following low-temperature (~90 °C) and low-dose (0.006 and 0.03 dpa) mixed-spectrum neutronmore » irradiation and subsequent isochronal annealing at 400, 500, 650, 800, 1000, 1150, and 1300 °C. The results provide insights into microstructural and defect evolution, thus identifying the mechanisms of different annealing behavior. Following 1 h annealing, ex situ characterization of vacancy defects using positron lifetime spectroscopy and coincidence Doppler broadening was performed. The vacancy cluster size distributions indicated intense vacancy clustering at 400 °C with significant damage recovery around 1000 °C. Coincidence Doppler broadening measurements confirm the trend of the vacancy defect evolution, and the S–W plots indicate that only a single type of vacancy cluster is present. Furthermore, transmission electron microscopy observations at selected annealing conditions provide supplemental information on dislocation loop populations and visible void formation. This microstructural information is consistent with the measured irradiation-induced hardening at each annealing stage. This provides insight into tungsten hardening and embrittlement due to irradiation-induced matrix defects.« less

  2. Double, Double Toil and Trouble: Tungsten Burns and Helium Bubbles | U.S.

    Office of Science (SC) Website

    DOE Office of Science (SC) Double, Double Toil and Trouble: Tungsten Burns and Helium Bubbles Advanced Scientific Computing Research (ASCR) ASCR Home About Research Facilities Science Highlights Benefits of ASCR Funding Opportunities Advanced Scientific Computing Advisory Committee (ASCAC) Community Resources Contact Information Advanced Scientific Computing Research U.S. Department of Energy SC-21/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-7486 F: (301)

  3. Double, Double Toil and Trouble: Tungsten Burns and Helium Bubbles | U.S.

    Office of Science (SC) Website

    DOE Office of Science (SC) Double, Double Toil and Trouble: Tungsten Burns and Helium Bubbles Fusion Energy Sciences (FES) FES Home About Research Facilities Science Highlights Benefits of FES Funding Opportunities Fusion Energy Sciences Advisory Committee (FESAC) Community Resources Contact Information Fusion Energy Sciences U.S. Department of Energy SC-24/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-4941 F: (301) 903-8584 E: Email Us More Information »

  4. Helium bubble formation in ultrafine and nanocrystalline tungsten under different extreme conditions

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    El-atwani, O.; Hattar, Khalid Mikhiel; Hinks, J. A.; Greaves, G.; Harilal, S. S.; Hassanein, A.

    2014-12-25

    We investigated the effects of helium ion irradiation energy and sample temperature on the performance of grain boundaries as helium sinks in ultrafine grained and nanocrystalline tungsten. Irradiations were performed at displacement and non-displacement energies and at temperatures above and below that required for vacancy migration. Microstructural investigations were performed using Transmission Electron Microscopy (TEM) combined with either in-situ or ex-situ ion irradiation. Under helium irradiation at an energy which does not cause atomic displacements in tungsten (70 eV), regardless of temperature and thus vacancy migration conditions, bubbles were uniformly distributed with no preferential bubble formation on grain boundaries. Moreover,more » at energies that can cause displacements, bubbles were observed to be preferentially formed on the grain boundaries only at high temperatures where vacancy migration occurs. Under these conditions, the decoration of grain boundaries with large facetted bubbles occurred on nanocrystalline grains with dimensions less than 60 nm. Finally, we discuss the importance of vacancy supply and the formation and migration of radiation-induced defects on the performance of grain boundaries as helium sinks and the resulting irradiation tolerance of ultrafine grained and nanocrystalline tungsten to bubble formation.« less

  5. The effects of tungsten's pre-irradiation surface condition on helium-irradiated morphology

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Garrison, Lauren M.; Kulcinski, Gerald L.

    2015-07-17

    Erosion is a concern associated with the use of tungsten as a plasma-facing component in fusion reactors. To compare the damage progression, polycrystalline tungsten (PCW) and (110) single crystal tungsten (SCW) samples were prepared with (1) a mechanical polish (MP) with roughness values in the range of 0.018–0.020 μm and (2) an MP and electropolish (MPEP) resulting in roughness values of 0.010–0.020 μm for PCW and 0.003–0.005 μm for SCW samples. Samples were irradiated with 30 keV He+ at 1173 K to fluences between 3 × 1021 and 6 × 1022 He/m2. The morphologies that developed after low-fluence bombardment weremore » different for each type of sample—MP SCW, MPEP SCW, MP PCW, and MPEP PCW. At the highest fluence, the SCW MPEP sample lost significantly more mass and developed a different morphology than the MP SCW sample. The PCW samples developed a similar morphology and had similar mass loss at the highest fluence. Surface preparation can have a significant effect on post-irradiation morphology that should be considered for the design of future fusion reactors such as ITER and DEMO.« less

  6. Collisional-radiative modeling of tungsten at temperatures of 1200–2400 eV

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Colgan, James; Fontes, Christopher; Zhang, Honglin; Abdallah, Jr., Joseph

    2015-04-30

    We discuss new collisional-radiative modeling calculations of tungsten at moderate temperatures of 1200 to 2400 eV. Such plasma conditions are relevant to ongoing experimental work at ASDEX Upgrade and are expected to be relevant for ITER. Our calculations are made using the Los Alamos National Laboratory (LANL) collisional-radiative modeling ATOMIC code. These calculations formed part of a submission to the recent NLTE-8 workshop that was held in November 2013. This series of workshops provides a forum for detailed comparison of plasma and spectral quantities from NLTE collisional-radiative modeling codes. We focus on the LANL ATOMIC calculations for tungsten that weremore » submitted to the NLTE-8 workshop and discuss different models that were constructed to predict the tungsten emission. In particular, we discuss comparisons between semi-relativistic configuration-average and fully relativistic configuration-average calculations. We also present semi-relativistic calculations that include fine-structure detail, and discuss the difficult problem of ensuring completeness with respect to the number of configurations included in a CR calculation.« less

  7. Measurement of quasiparticle transport in aluminum films using tungsten transition-edge sensors

    SciTech Connect (OSTI)

    Yen, J. J. Shank, B.; Cabrera, B.; Moffatt, R.; Redl, P.; Young, B. A.; Tortorici, E. C.; Brink, P. L.; Cherry, M.; Tomada, A.; Kreikebaum, J. M.

    2014-10-20

    We report on experimental studies of phonon sensors which utilize quasiparticle diffusion in thin aluminum films connected to tungsten transition-edge-sensors (TESs) operated at 35 mK. We show that basic TES physics and a simple physical model of the overlap region between the W and Al films in our devices enables us to accurately reproduce the experimentally observed pulse shapes from x-rays absorbed in the Al films. We further estimate quasiparticle loss in Al films using a simple diffusion equation approach. These studies allow the design of phonon sensors with improved performance.

  8. Remote reactor repair: GTA (gas tungsten Arc) weld cracking caused by entrapped helium

    SciTech Connect (OSTI)

    Kanne, W.R. Jr.

    1988-01-01

    A repair patch was welded to the wall of a nuclear reactor tank using remotely controlled thirty-foot long robot arms. Further repair was halted when gas tungsten arc (GTA) welds joining type 304L stainless steel patches to the 304 stainless steel wall developed toe cracks in the heat-affected zone (HAZ). The role of helium in cracking was investigated using material with entrapped helium from tritium decay. As a result of this investigation, and of an extensive array of diagnostic tests performed on reactor tank wall material, helium embrittlement was shown to be the cause of the toe cracks.

  9. Progress report on a fully automatic Gas Tungsten Arc Welding (GTAW) system development

    SciTech Connect (OSTI)

    Daumeyer, G.J. III

    1994-12-01

    A plan to develop a fully automatic gas tungsten arc welding (GTAW) system that will utilize a vision-sensing computer (which will provide in-process feedback control) is presently in work. Evaluations of different technological aspects and system design requirements continue. This report summaries major activities in the plan`s successful progress. The technological feasibility of producing the fully automated GTAW system has been proven. The goal of this process development project is to provide a production-ready system within the shortest reasonable time frame.

  10. Detrapping of tungsten nanoparticles in a direct-current argon glow discharge

    SciTech Connect (OSTI)

    Coudel, L. Kumar, K. Kishor; Arnas, C.

    2014-12-15

    Nanoparticles are grown from the sputtering of a tungsten cathode in a direct current argon glow discharge. Laser light scattering of a vertical laser sheet going through the plasma reveals that the dust particle cloud is compressed and pushed towards the anode during the discharge. Scanning electron microscopy images of substrates exposed to the plasma for given durations show that dust particles are continuously falling down on the anode during the discharge. These observations are explained by the fact that the electrostatic force at the negative glow-anode sheath boundary cannot balance the ion drag, gravity, and thermophoresis forces for particles of more than a few tens of nanometres in diameter.

  11. Adhesion of diamond coatings synthesized by oxygen-acetylene flame CVD on tungsten carbide

    SciTech Connect (OSTI)

    Marinkovic, S.; Stankovic, S.; Dekanski, A.

    1995-12-31

    The results of a study concerned with chemical vapor deposition of diamond on tungsten carbide cutting tools using an oxygen-acetylene flame in a normal ambient environment are presented. Effects of preparation conditions on the adhesion of the coating have been investigated, including different surface treatment, different position of the flame with respect to the coated surface, effect of an intermediate poorly crystalline diamond layer, etc. In particular, effect of polishing and ultrasonic lapping with diamond powder was compared with that of a corresponding treatment with SiC powder.

  12. Catching the role of anisotropic electronic distribution and charge transfer in halogen bonded complexes of noble gases

    SciTech Connect (OSTI)

    Bartocci, Alessio; Cappelletti, David; Pirani, Fernando; Belpassi, Leonardo; Falcinelli, Stefano; Grandinetti, Felice; Tarantelli, Francesco

    2015-05-14

    The systems studied in this work are gas-phase weakly bound adducts of the noble-gas (Ng) atoms with CCl{sub 4} and CF{sub 4}. Their investigation was motivated by the widespread current interest for the intermolecular halogen bonding (XB), a structural motif recognized to play a role in fields ranging from elementary processes to biochemistry. The simulation of the static and dynamic behaviors of complex systems featuring XB requires the formulation of reliable and accurate model potentials, whose development relies on the detailed characterization of strength and nature of the interactions occurring in simple exemplary halogenated systems. We thus selected the prototypical Ng-CCl{sub 4} and Ng-CF{sub 4} and performed high-resolution molecular beam scattering experiments to measure the absolute scale of their intermolecular potentials, with high sensitivity. In general, we expected to probe typical van der Waals interactions, consisting of a combination of size (exchange) repulsion with dispersion/induction attraction. For the He/Ne-CF{sub 4}, the analysis of the glory quantum interference pattern, observable in the velocity dependence of the integral cross section, confirmed indeed this expectation. On the other hand, for the He/Ne/Ar-CCl{sub 4}, the scattering data unravelled much deeper potential wells, particularly for certain configurations of the interacting partners. The experimental data can be properly reproduced only including a shifting of the repulsive wall at shorter distances, accompanied by an increased role of the dispersion attraction, and an additional short-range stabilization component. To put these findings on a firmer ground, we performed, for selected geometries of the interacting complexes, accurate theoretical calculations aimed to evaluate the intermolecular interaction and the effects of the complex formation on the electron charge density of the constituting moieties. It was thus ascertained that the adjustments of the potential suggested by the analysis of the experiments actually reflect two chemically meaningful contributions, namely, a stabilizing interaction arising from the anisotropy of the charge distribution around the Cl atom in CCl{sub 4} and a stereospecific electron transfer that occurs at the intermolecular distances mainly probed by the experiments. Our model calculations suggest that the largest effect is for the vertex geometry of CCl{sub 4} while other geometries appear to play a minor to negligible role.

  13. Spotlights Archive | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    expanding tribal educational programs. July 2, 2015 Environmental Justice: Made-for-Television-Climate Change: A Global Reality The U.S. Department of Energy was invited to be a...

  14. Spotlights Archive | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    a trip to the National Museum of Nuclear Science & History, teamwork and personal development training, as well as site visits within the Grants Mining District. October 15,...

  15. Spotlights Archive | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    visitor to the Fernald Preserve in Ohio, enjoying activities like trail walks and bird watching. July 10, 2014 DOE Partners with Other Federal Agencies Working on the Wind...

  16. Spotlights Archive | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    hosted a Northern Saw-Whet Owl banding demonstration by master bander, Tim Tolford. Bird banding is a technique used to study wild birds by attaching a tag to their leg to...

  17. Spotlights Archive | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    as a tribute to the nation's armed forces (see bottom of page for a history of the Blue Star Memorials). July 12, 2013 Next Generation (NextGen) Geospatial Information System...

  18. Spotlights Archive | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Business Center (LMBC) in Morgantown, West Virginia, is now guarded by a state-of-the-art FM-200 Fire Suppression System. Installation of the new system began on June 11,...

  19. Manufacturing Spotlight: Boosting American Competitiveness

    Broader source: Energy.gov [DOE]

    Find out how the Energy Department is helping bring new clean energy technologies to the marketplace and make manufacturing processes more energy efficient.

  20. Spotlights Archive | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    sites located in 26 states. LM is also responsible for the administration of contractor pension plans and post-retirement benefits for over 10,000 former contractor workers...

  1. Spotlights Archive | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    stakeholders and regulators to gather input on the effectiveness of DOE LM community communication strategies. www.lmsurveyaddress.com Survey ad for Quarterly Newsletter...

  2. Dynamics of tungsten hexacarbonyl, dicobalt octacarbonyl, and their fragments adsorbed on silica surfaces

    SciTech Connect (OSTI)

    Muthukumar, Kaliappan; Valent, Roser; Jeschke, Harald O.

    2014-05-14

    Tungsten and cobalt carbonyls adsorbed on a substrate are typical starting points for the electron beam induced deposition of tungsten or cobalt based metallic nanostructures. We employ first principles molecular dynamics simulations to investigate the dynamics and vibrational spectra of W(CO){sub 6} and W(CO){sub 5} as well as Co{sub 2}(CO){sub 8} and Co(CO){sub 4} precursor molecules on fully and partially hydroxylated silica surfaces. Such surfaces resemble the initial conditions of electron beam induced growth processes. We find that both W(CO){sub 6} and Co{sub 2}(CO){sub 8} are stable at room temperature and mobile on a silica surface saturated with hydroxyl groups (OH), moving up to half an Angstrm per picosecond. In contrast, chemisorbed W(CO){sub 5} or Co(CO){sub 4} ions at room temperature do not change their binding site. These results contribute to gaining fundamental insight into how the molecules behave in the simulated time window of 20 ps and our determined vibrational spectra of all species provide signatures for experimentally distinguishing the form in which precursors cover a substrate.

  3. A Conceptual Multi-Megawatt System Based on a Tungsten CERMET Reactor

    SciTech Connect (OSTI)

    Jonathan A. Webb; Brian Gross

    2011-02-01

    Abstract. A conceptual reactor system to support Multi-Megawatt Nuclear Electric Propulsion is investigated within this paper. The reactor system consists of a helium cooled Tungsten-UN fission core, surrounded by a beryllium neutron reflector and 13 B4C control drums coupled to a high temperature Brayton power conversion system. Excess heat is rejected via carbon reinforced heat pipe radiators and the gamma and neutron flux is attenuated via segmented shielding consisting of lithium hydride and tungsten layers. Turbine inlet temperatures ranging from 1300 K to 1500 K are investigated for their effects on specific powers and net electrical outputs ranging from 1 MW to 100 MW. The reactor system is estimated to have a mass, which ranges from 15 Mt at 1 MWe and a turbine inlet temperature of 1500 K to 1200 Mt at 100 MWe and a turbine temperature of 1300 K. The reactor systems specific mass ranges from 32 kg/kWe at a turbine inlet temperature of 1300 K and a power of 1 MWe to 9.5 kg/kW at a turbine temperature of 1500 K and a power of 100 MWe.

  4. Microsegregation in high-molybdenum austenitic stainless steel laser beam and gas tungsten arc welds

    SciTech Connect (OSTI)

    Kujanpaeae, V.P.; David, S.A.

    1986-01-01

    An austenitic stainless steel with 6% molybdenum (thickness 6 mm) was welded using laser beam (LB) and gas tungsten arc (GTA) processes at various welding speeds. Depending on the welding speed the primary dendrite spacing ranged from 12 to 17 ..mu..m and from 2 to 7 ..mu..m for the GTA and LB welds, respectively. Extensive segregation of molybdenum was observed in the GTA welds. The segregation ratio for molybdenum, C/sub ID//C/sub D/, was found to be 1.9 in the GTA weld, and 1.2 in the LB weld. Distribution of iron, chromium and nickel was found nearly uniform in both welds. A recovered microstructure was observed after a post-weld annealing heat treatment. Annealing had a profound effect on the molybdenum segregation ratio in the laser weld. The critical pitting temperature (CPT) determined by a standard test was 55/sup 0/C for welds made using both processes, whereas it was 75/sup 0/C for the base metal. Upon homogenization the CPT of the laser beam weld increased to the base metal value, while that of the gas tungsten arc weld remained at 60/sup 0/C.

  5. Irradiation effect on deuterium behaviour in low-dose HFIR neutron-irradiated tungsten

    SciTech Connect (OSTI)

    Shimada, Masashi; Cao, G.; Otsuka, T.; Hara, M.; Kobayashi, M.; Oya, Y.; Hatano, Y.

    2014-12-01

    Tungsten samples were irradiated by neutrons in the High Flux Isotope Reactor, Oak Ridge National Laboratory at reactor coolant temperatures of 50-70C to low displacement damage of 0.025 and 0.3 dpa under the framework of the US-Japan TITAN program (2007-2013). After cooling down, the HFIR neutron-irradiated tungsten samples were exposed to deuterium plasmas in the Tritium Plasma Experiment, Idaho National Laboratory at 100, 200 and 500 C twice at the ion fluence of 510? m? to reach a total ion fluence of 110? m? in order to investigate the near surface deuterium retention and saturation via nuclear reaction analysis. Final thermal desorption spectroscopy was performed to elucidate irradiation effect on total deuterium retention. Nuclear reaction analysis results showed that the maximum near surface (<5 m depth) deuterium concentration increased from 0.5 at % D/W in 0.025 dpa samples to 0.8 at. % D/W in 0.3 dpa samples. The large discrepancy between the total retention via thermal desorption spectroscopy and the near surface retention via nuclear reaction analysis indicated the deuterium was migrated and trapped in bulk (at least 50 m depth for 0.025 dpa and 35 m depth for 0.025 dpa) at 500 C case even in the relatively low ion fluence of 10? m?.

  6. Line spectrum and ion temperature measurements from tungsten ions at low ionization stages in large helical device based on vacuum ultraviolet spectroscopy in wavelength range of 5002200

    SciTech Connect (OSTI)

    Oishi, T. Morita, S.; Goto, M.; Huang, X. L.; Zhang, H. M.

    2014-11-15

    Vacuum ultraviolet spectra of emissions released from tungsten ions at lower ionization stages were measured in the Large Helical Device (LHD) in the wavelength range of 5002200 using a 3 m normal incidence spectrometer. Tungsten ions were distributed in the LHD plasma by injecting a pellet consisting of a small piece of tungsten metal and polyethylene tube. Many lines having different wavelengths from intrinsic impurity ions were observed just after the tungsten pellet injection. Doppler broadening of a tungsten candidate line was successfully measured and the ion temperature was obtained.

  7. Transforming dielectric coated tungsten and platinum wires to gaseous state using negative nanosecond-pulsed-current in vacuum

    SciTech Connect (OSTI)

    Wu, Jian; Li, Xingwen Wang, Kun; Yang, Zefeng; Shi, Zongqian; Jia, Shenli; Qiu, Aici; Li, Zhenghong

    2014-11-15

    With the help of thin dielectric coatings, corona free explosions were achieved in the region of about half a wire length (2?cm) for tungsten wires and nearly the whole wire length for platinum wires under a fast rising (46170?A/ns) negative polarity current in vacuum. Expansion velocity of the tungsten gas was over 10?km/s. Current waveforms from exploding coated wires were similar to those from bare wires in the air including a current pause stage. Coated wires with different coating parameters had a similar joule energy deposition before voltage collapsed, but a quite different scenario in the region near the electrodes. The axial field under negative current was the main reason for the axial inhomogeneity of coated tungsten wires. Tungsten or platinum gases in the vaporized region were tightly encompassed by the dielectric coating, while gaps or probably low density gases, were observed between the coating and the edge of the dense wire core in the core-corona structure region.

  8. Atomically Thin Heterostructures Based on Single-Layer Tungsten Diselenide and Graphene [Plus Supplemental Information

    SciTech Connect (OSTI)

    Lin, Yu-Chuan; Chang, Chih-Yuan S.; Ghosh, Ram Krishna; Li, Jie; Zhu, Hui; Addou, Rafik; Diaconescu, Bogdan; Ohta, Taisuke; Peng, Xin; Lu, Ning; Kim, Moon J.; Robinson, Jeremy T.; Wallace, Robert M.; Mayer, Theresa S.; Datta, Suman; Li, Lain-Jong; Robinson, Joshua A.

    2014-11-10

    Heterogeneous engineering of two-dimensional layered materials, including metallic graphene and semiconducting transition metal dichalcogenides, presents an exciting opportunity to produce highly tunable electronic and optoelectronic systems. We report the direct growth of highly crystalline, monolayer tungsten diselenide (WSe2) on epitaxial graphene (EG). Raman spectroscopy and photoluminescence confirms high-quality WSe2 monolayers; while transmission electron microscopy shows an atomically sharp interface and low energy electron diffraction confirms near perfect orientation between WSe2 and EG. Vertical transport measurements across the WSe2/EG heterostructure provides evidence that a tunnel barrier exists due to the van der Waals gap, and is supported by density functional theory that predicts a 1.6 eV barrier for transport from WSe2 to graphene.

  9. A continuum-scale model of hydrogen precipitate growth in tungsten plasma-facing materials.

    SciTech Connect (OSTI)

    Causey, Rion A.; Cowgill, Donald F.; Kolasinski, Robert D.

    2010-05-01

    The low solubility of hydrogen in tungsten leads to the growth of near-surface hydrogen precipitates during high-flux plasma exposure, strongly affecting migration and trapping in the material. We have developed a continuum-scale model of precipitate growth that leverages existing techniques for simulating the evolution of {sup 3}He gas bubbles in metal tritides. The present approach focuses on bubble growth by dislocation loop punching, assuming a diffusing flux to nucleation sites that arises from ion implantation. The bubble size is dictated by internal hydrogen pressure, the mechanical properties of the material, as well as local stresses. In this article, we investigate the conditions required for bubble growth. Recent focused ion beam (FIB) profiling studies that reveal the sub-surface damage structure provide an experimental database for comparison with the modeling results.

  10. High resolution electron microscopy study of as-prepared and annealed tungsten-carbon multilayers

    SciTech Connect (OSTI)

    Nguyen, T.D.; Gronsky, R.; Kortright, J.B.

    1988-12-01

    A series of sputtered tungsten-carbon multilayer structures with periods ranging from 2 to 12 nm in the as-prepared state and after annealing at 500/degree/C for 4 hours has been studied with high resolution transmission electron microscopy. The evolution with annealing of the microstructure of these multilayers depends on their period. As-prepared structures appear predominantly amorphous from TEM imaging and diffraction. Annealing results in crystallization of the W-rich layers into WC in the larger period samples, and less complete or no crystallization in the smaller period samples. X-ray scattering reveals that annealing expands the period in a systematic way. The layers remain remarkably well-defined after annealing under these conditions. 12 refs., 4 figs., 1 tab.

  11. Growth of tungsten bronze family crystals. Final technical report, 6 May 1985-30 November 1988

    SciTech Connect (OSTI)

    Neurgaonkar, R.R.; Cross, L.E.

    1988-03-01

    A systematic investigation of tungsten bronze crystals for electro-optic and photorefractive applications was carried out successfully. The Sr{sub 1-X}BaXNb{sub 2}O{sub 6} (SBN) and Ba{sub 2-X}SrXK{sub 1-y}NaYNb{sub 5}O{sub 15} (BSKNN) system crystals were grown in optical quality with and without specific impurities whose purpose is to enhance photorefractive coupling and speed. Both SBN and BSKNN crystals appear to be excellent hosts for electro-optic applications, e.g., modulators, waveguides, and spatial light modulators (SLM) and photorefractive applications, e.g., phase conjugation, image processing, optical computing and laser hardening. For photorefractive applications, cerium and chromium doping show the largest effects on photorefractive coupling and speed.

  12. Causal Factors of Weld Porosity in Gas Tungsten Arc Welding of Powder Metallurgy Produced Titanium Alloys

    SciTech Connect (OSTI)

    Muth, Thomas R; Yamamoto, Yukinori; Frederick, David Alan; Contescu, Cristian I; Chen, Wei; Lim, Yong Chae; Peter, William H; Feng, Zhili

    2013-01-01

    ORNL undertook an investigation using gas tungsten arc (GTA) welding on consolidated powder metallurgy (PM) titanium (Ti) plate, to identify the causal factors behind observed porosity in fusion welding. Tramp element compounds of sodium and magnesium, residual from the metallothermic reduction of titanium chloride used to produce the titanium, were remnant in the starting powder and were identified as gas forming species. PM-titanium made from revert scrap where sodium and magnesium were absent, showed fusion weld porosity, although to a lesser degree. We show that porosity was attributable to hydrogen from adsorbed water on the surface of the powders prior to consolidation. The removal / minimization of both adsorbed water on the surface of titanium powder and the residues from the reduction process prior to consolidation of titanium powders, are critical to achieve equivalent fusion welding success similar to that seen in wrought titanium produced via the Kroll process.

  13. Development of an improved GTA (gas tungsten arc) weld temperature monitor fixture

    SciTech Connect (OSTI)

    Hollar, D.L.

    1990-05-01

    An initial design weld temperature control fixture was implemented into final closure of an electronic assembly in November 1986. Use of this fixture indicated several areas that could be improved. Review of these areas with the process engineer and the weld operator provided the ideas to be incorporated into the new design Phase 2 fixture. Some primary areas of change and improvement included fixture mobility to provide better accessibility to the weld joint area, automatic timed blow cooling of the weld joint, and a feature to assure proper thermocouple placement. The resulting Phase 2 fixture design provided all of the essential weld temperature monitoring features in addition to several significant improvements. Technology developed during this project will pave the way to similar process monitoring of other manual gas tungsten arc (GTA) welding applications. 9 figs.

  14. Atomically Thin Heterostructures Based on Single-Layer Tungsten Diselenide and Graphene [Plus Supplemental Information

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Lin, Yu-Chuan; Chang, Chih-Yuan S.; Ghosh, Ram Krishna; Li, Jie; Zhu, Hui; Addou, Rafik; Diaconescu, Bogdan; Ohta, Taisuke; Peng, Xin; Lu, Ning; et al

    2014-11-10

    Heterogeneous engineering of two-dimensional layered materials, including metallic graphene and semiconducting transition metal dichalcogenides, presents an exciting opportunity to produce highly tunable electronic and optoelectronic systems. We report the direct growth of highly crystalline, monolayer tungsten diselenide (WSe2) on epitaxial graphene (EG). Raman spectroscopy and photoluminescence confirms high-quality WSe2 monolayers; while transmission electron microscopy shows an atomically sharp interface and low energy electron diffraction confirms near perfect orientation between WSe2 and EG. Vertical transport measurements across the WSe2/EG heterostructure provides evidence that a tunnel barrier exists due to the van der Waals gap, and is supported by density functional theorymore » that predicts a 1.6 eV barrier for transport from WSe2 to graphene.« less

  15. Irradiation effect on deuterium behaviour in low-dose HFIR neutron-irradiated tungsten

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Shimada, Masashi; Cao, G.; Otsuka, T.; Hara, M.; Kobayashi, M.; Oya, Y.; Hatano, Y.

    2014-12-01

    Tungsten samples were irradiated by neutrons in the High Flux Isotope Reactor, Oak Ridge National Laboratory at reactor coolant temperatures of 50-70°C to low displacement damage of 0.025 and 0.3 dpa under the framework of the US-Japan TITAN program (2007-2013). After cooling down, the HFIR neutron-irradiated tungsten samples were exposed to deuterium plasmas in the Tritium Plasma Experiment, Idaho National Laboratory at 100, 200 and 500 °C twice at the ion fluence of 5×10²⁵ m⁻² to reach a total ion fluence of 1×10²⁶ m⁻² in order to investigate the near surface deuterium retention and saturation via nuclear reaction analysis. Finalmore » thermal desorption spectroscopy was performed to elucidate irradiation effect on total deuterium retention. Nuclear reaction analysis results showed that the maximum near surface (<5 µm depth) deuterium concentration increased from 0.5 at % D/W in 0.025 dpa samples to 0.8 at. % D/W in 0.3 dpa samples. The large discrepancy between the total retention via thermal desorption spectroscopy and the near surface retention via nuclear reaction analysis indicated the deuterium was migrated and trapped in bulk (at least 50 µm depth for 0.025 dpa and 35 µm depth for 0.025 dpa) at 500 °C case even in the relatively low ion fluence of 10²⁶ m⁻².« less

  16. Catalytic ionic hydrogenation of ketones using tungsten or molybdenum catalysts with increased lifetimes

    DOE Patents [OSTI]

    Bullock, R. Morris; Kimmich, Barbara F. M.; Fagan, Paul J.; Hauptman, Elisabeth

    2003-09-02

    The present invention is a process for the catalytic hydrogenation of ketones and aldehydes to alcohols at low temperatures and pressures using organometallic molybdenum and tungsten complexes and the catalyst used in the process. The reactants include a functional group which is selected from groups represented by the formulas R*(C.dbd.O)R' and R*(C.dbd.O)H, wherein R* and R' are selected from hydrogen or any alkyl or aryl group. The process includes reacting the organic compound in the presence of hydrogen and a catalyst to form a reaction mixture. The catalyst is prepared by reacting Ph.sub.3 C.sup.+ A.sup.- with a metal hydride. A.sup.- represents an anion and can be BF.sub.4.sup.-, PF.sub.6.sup.-, CF.sub.3 SO.sub.3.sup.- or Bar'.sub.4.sup.-, wherein Ar'=3,5-bis(trifluoromethyl)phenyl. The metal hydride is represented by the formula: HM(CO).sub.2 [.eta..sup.5 :.eta..sup.1 --C.sub.5 H.sub.4 (XH.sub.2).sub.n PR.sub.2 ] wherein M represents a molybdenum (Mo) atom or a tungsten (W) atom; X is a carbon atom, a silicon atom or a combination of carbon (C) and silicon (Si) atoms; n is any positive integer; R represents two hydrocarbon groups selected from H, an aryl group and an alkyl group, wherein both R groups can be the same or different. The metal hydride is reacted with Ph.sub.3 C.sup.+ A.sup.- either before reacting with the organic compound or in the reaction mixture.

  17. Simultaneous impact of neutron irradiation and sputtering on the surface structure of selfdamaged ITERgrade tungsten

    SciTech Connect (OSTI)

    Belyaeva, A. I. Savchenko, A. A.; Galuza, A. A.; Kolenov, I. V.

    2014-07-15

    Simultaneous effects of neutron irradiation and longterm sputtering on the surface relief of ITERgrade tungsten were studied. The effects of neutroninduced displacement damage have been simulated by irradiation of tungsten target with W{sup 6+} ions of 20?MeV energy. Ar{sup +} ions with energy 600?eV were used as imitation of charge exchange atoms in ITER. The surface relief was studied after each sputtering act. The singularity in the WJIG surface relief was ascertained experimentally at the first time, which determines the law of roughness extension under sputtering. As follows from the experimental data, the neutron irradiation has not to make a decisive additional contribution in the processes developing under impact of charge exchange atoms only.

  18. Direct measurement of the work of fracture for grain boundaries of twist misorientation about (100) in tungsten

    SciTech Connect (OSTI)

    Liu, J.M.; Shen, B.W.

    1984-06-01

    The authors report results on the direct measurement of the work of fracture in twist boundaries in electron beam zone refined bicrystals of tungsten. The work of fracture is referred to as the energy required for crack extension. This approach may be used to advantage when the effects of impurities are present, for example, in problems related to grain boundary embrittlement in steels, copper and nickel.

  19. Metal halogen electrochemical cell

    SciTech Connect (OSTI)

    Walsh, F.M.

    1986-06-03

    An electrochemical cell is described having a metal anode selected from the group consisting of zinc and cadmium; a bromine cathode; and, an aqueous electrolyte containing a metal bromide, the metal having the same metal as the metal of the anode, the improvement comprising: a bromine complexing agent in the aqueous metal bromide electrolyte consisting solely of a tetraorgano substituted ammonium salt, which salt is soluble of water and forms and substantially water immiscible liquid bromine complex at temperatures in the range of about 10/sup 0/C. to about 60/sup 0/C. and wherein the tetraorgano substituted ammonium salt is selected from asymmetric quaternary ammonium compounds.

  20. Analysis of hydrogen adsorption and surface binding configuration on tungsten using direct recoil spectrometry

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Kolasinski, R. D.; Hammond, K. D.; Whaley, J. A.; Buchenauer, D. A.; Wirth, B. D.

    2014-12-03

    In our work, we apply low energy ion beam analysis to examine directly how the adsorbed hydrogen concentration and binding configuration on W(1 0 0) depend on temperature. We exposed the tungsten surface to fluxes of both atomic and molecular H and D. We then probed the H isotopes adsorbed along different crystal directions using 1–2 keV Ne+ ions. At saturation coverage, H occupies two-fold bridge sites on W(1 0 0) at 25 °C. Moreover, the H coverage dramatically changes the behavior of channeled ions, as does reconstruction of the surface W atoms. For the exposure conditions examined here, wemore » find that surface sites remain populated with H until the surface temperature reaches 200 °C. Then, we observe H rapidly desorbing until only a residual concentration remains at 450 °C. Development of an efficient atomistic model that accurately reproduces the experimental ion energy spectra and azimuthal variation of recoiled H is underway.« less

  1. Decomposition pathways of C2 oxygenates on Rh-modified tungsten carbide surfaces

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Kelly, Thomas G.; Ren, Hui; Chen, Jingguang G.

    2015-03-27

    Ethanol decomposition on tungsten monocarbide (WC) and Rh-modified WC was investigated using ultrahigh vacuum (UHV) surface science experiments and density functional theory (DFT) calculations. DFT calculations indicated that the binding energies of ethanol and its decomposition intermediates on WC(0001) were modified by Rh, with Rh/WC(0001) showing similar values to those on Rh(111). Through temperature-programmed desorption (TPD) experiments on polycrystalline WC and Rh-modified WC, it was shown that the selectivity for ethanol decomposition was different on these surfaces. On WC, the C-O bond of ethanol was preferentially broken to produce ethylene; on Rh-modified WC, the C-C bond was broken to producemore » carbon monoxide and methane. In addition, high-resolution electron energy loss spectroscopy (HREELS) was used to determine likely surface intermediates. On Rh-modified WC, ethanol first formed ethoxy through O-H scission, then reacted through an aldehyde intermediate to form the C1 products.« less

  2. FINAL FOCUS ION BEAM INTENSITY FROM TUNGSTEN FOIL CALORIMETER AND SCINTILLATOR IN NDCX-I

    SciTech Connect (OSTI)

    Lidia, S.M.; Bieniosek, F.; Henestroza, E.; Ni, P.; Seidl, P.

    2010-04-30

    Laboratory high energy density experiments using ion beam drivers rely upon the delivery of high-current, high-brightness ion beams with high peak intensity onto targets. Solid-state scintillators are typically used to measure the ion beam spatial profile but they display dose-dependent degradation and aging effects. These effects produce uncertainties and limit the accuracy of measuring peak beam intensities delivered to the target. For beam tuning and characterizing the incident beam intensity, we have developed a cross-calibrating diagnostic suite that extends the upper limit of measurable peak intensity dynamic range. Absolute intensity calibration is obtained with a 3 {micro}m thick tungsten foil calorimeter and streak spectrometer. We present experimental evidence for peak intensity measures in excess of 400 kW/cm{sup 2} using a 0.3 MV, 25 mA, 5-20 {micro}sec K{sup +1} beam. Radiative models and thermal diffusion effects are discussed because they affect temporal and spatial resolution of beam intensity profiles.

  3. Decomposition pathways of C2 oxygenates on Rh-modified tungsten carbide surfaces

    SciTech Connect (OSTI)

    Kelly, Thomas G.; Ren, Hui; Chen, Jingguang G.

    2015-03-27

    Ethanol decomposition on tungsten monocarbide (WC) and Rh-modified WC was investigated using ultrahigh vacuum (UHV) surface science experiments and density functional theory (DFT) calculations. DFT calculations indicated that the binding energies of ethanol and its decomposition intermediates on WC(0001) were modified by Rh, with Rh/WC(0001) showing similar values to those on Rh(111). Through temperature-programmed desorption (TPD) experiments on polycrystalline WC and Rh-modified WC, it was shown that the selectivity for ethanol decomposition was different on these surfaces. On WC, the C-O bond of ethanol was preferentially broken to produce ethylene; on Rh-modified WC, the C-C bond was broken to produce carbon monoxide and methane. In addition, high-resolution electron energy loss spectroscopy (HREELS) was used to determine likely surface intermediates. On Rh-modified WC, ethanol first formed ethoxy through O-H scission, then reacted through an aldehyde intermediate to form the C1 products.

  4. Beta (β) tungsten thin films: Structure, electron transport, and giant spin Hall effect

    SciTech Connect (OSTI)

    Hao, Qiang; Chen, Wenzhe; Xiao, Gang

    2015-05-04

    We use a simple magnetron sputtering process to fabricate beta (β) tungsten thin films, which are capable of generating giant spin Hall effect. As-deposited thin films are always in the metastable β-W phase from 3.0 to 26.7 nm. The β-W phase remains intact below a critical thickness of 22.1 nm even after magnetic thermal annealing at 280 °C, which is required to induce perpendicular magnetic anisotropy (PMA) in a layered structure of β-W/Co{sub 40}Fe{sub 40}B{sub 20}/MgO. Intensive annealing transforms the thicker films (>22.1 nm) into the stable α-W phase. We analyze the structure and grain size of both β- and α-W thin films. Electron transport in terms of resistivity and normal Hall effect is studied over a broad temperature range of 10 K to at least 300 K on all samples. Very low switching current densities are achieved in β-W/Co{sub 40}Fe{sub 40}B{sub 20}/MgO with PMA. These basic properties reveal useful behaviors in β-W thin films, making them technologically promising for spintronic magnetic random access memories and spin-logic devices.

  5. Resistive switching phenomena of tungsten nitride thin films with excellent CMOS compatibility

    SciTech Connect (OSTI)

    Hong, Seok Man; Kim, Hee-Dong; An, Ho-Myoung; Kim, Tae Geun

    2013-12-15

    Graphical abstract: - Highlights: The resistive switching characteristics of WN{sub x} thin films. Excellent CMOS compatibility WN{sub x} films as a resistive switching material. Resistive switching mechanism revealed trap-controlled space charge limited conduction. Good endurance and retention properties over 10{sup 5} cycles, and 10{sup 5} s, respectively - Abstract: We report the resistive switching (RS) characteristics of tungsten nitride (WN{sub x}) thin films with excellent complementary metal-oxide-semiconductor (CMOS) compatibility. A Ti/WN{sub x}/Pt memory cell clearly shows bipolar RS behaviors at a low voltage of approximately 2.2 V. The dominant conduction mechanisms at low and high resistance states were verified by Ohmic behavior and trap-controlled space-charge-limited conduction, respectively. A conducting filament model by a redox reaction explains the RS behavior in WN{sub x} films. We also demonstrate the memory characteristics during pulse operation, including a high endurance over >10{sup 5} cycles and a long retention time of >10{sup 5} s.

  6. A Review of Tungsten Heavy Alloy Utilization in Isotope Transport Containers - 13380

    SciTech Connect (OSTI)

    Caldwell, Steven G. [ATI Firth Sterling, Madison, AL (United States)] [ATI Firth Sterling, Madison, AL (United States)

    2013-07-01

    A common requirement for radioisotope transport containers is that they provide both durable and efficient shielding of penetrating gamma radiation. This is the case for transport of both spent nuclear fuel as well as intentionally created radioisotopes for medical or other uses. Tungsten heavy alloy (WHA) provides a unique engineering property set for such shielding - easily surpassing more commonly used lead alloys in both strength and attenuation. This family of alloys contains typically 90-98 wt.% W in combination with transition metals such as Ni and Fe. WHA is manufactured in near net shape blanks by liquid phase sintering of compacted powder shapes to full metallurgical density parts. This powder metallurgy approach is described in its ability to provide excellent material utilization and affords efficient manufacturing of various shapes required for gamma shields or collimators. WHAs offer very high density (approaching 19 g/cc) in combination with relatively high thermal conductivity, low thermal expansion, ambient corrosion resistance, and can be provided with mechanical properties comparable to many medium carbon steels. As such, they can be machined to complex, damage resistant geometries using common metal cutting tools and methods. WHA additionally provides a lower toxicity alternative to Pb- or U-based gamma shielding. Given the specialty nature of WHA, specific metallurgical characteristics are reviewed to assist shielding designers who may otherwise encounter difficulties locating important alloy selection and fabrication details. Contained within this materials and applications overview are guidelines for WHA component design, alloy selection, and practical machining, finishing, and assembly considerations. The microstructure of WHA is that of a metal matrix composite. This factor has specific implications in the design of components for stress service as well as their protection in the presence of electrolytes. WHA is also discussed in the broader context of materials compatibility, as it is rarely used in isolated monolithic shapes. Alloy selection for new applications is often made primarily on the basis of density. An alternative strategy to this selection approach is presented which proposes that mechanical requirements for a given shielding use be the primary selection criterion over density. Standard commercial grades of WHA for radiation shielding are defined by specifications such as AMS-T-21014 and ASTM B777. These specifications define 4 density classes of as-sintered WHA. Compositional options, as well as post-sinter processing of WHA, are discussed for shielding components that must exhibit higher levels of ductility or very low magnetic permeability. In addition to the mechanical advantages over Pb-based shielding, the higher linear attenuation of energetic photons for various grades of WHA (as calculated by the NIST XCOM routine) are presented for selected photon energies of interest to illustrate the shield volume reduction generally possible through the use of tungsten-based shielding. While W provides inefficient attenuation of neutrons in a mixed radiation environment, its secondary role in shielding gamma radiation produced as a result of neutron capture is also described. (authors)

  7. Fracture Toughness and Strength in a New Class of Bainitic Chromium-Tungsten Steels

    SciTech Connect (OSTI)

    Mao, S. X.; Sikka, V. K.

    2006-06-01

    This project dealt with developing an understanding of the toughening and stengthening mechanisms for a new class of Fe-3Cr-W(V) steels developed at Oak Ridge National Laboratory (ORNL) in collaboration with Nooter Corporation and other industrial partners. The new steele had 50% higher tensile strength up to 650 degrees Celsius than currently used steels and the potential for not requiring any postweld heat treatment (PWHT) and for reducing equipment weight by 25%. This project was closely related to the Nooter project described in the report Development of a New Class of Fe-3Cr-W(V) Ferritic steels for Industrial Process Applications (ORNL/TM-2005/82). The project was carried out jointly by the University of Pittsburgh and ORNL. The University of Pittsburgh carried out fracture toughness measurements and microstructural analysis on base metal and welded plates prepared at ORNL. The project focused on three areas. The first dealt with detailed microstructural analysis of base compositions of 3Cr-3WV and 3Cr-3WBV(Ta) in both normalized (N) and normalized and tempered (NT) conditions. The second aspect of the prject dealt with determining tensile properties and fracture toughness values of K{subIC} at room temperature for both 3Cr-3Wv and 3Cr-3WV(Ta) compositions. The third focus of the project was to measure the fracture toughness values of the base metal and the heat-affectged zone (HAZ) of a plate of Fe-3Cr-W(Mo)V steel plate welded by the gas tungsten are (GTA) process. The HAZ toughness was measured in both the as-welded and the PWHT condition.

  8. Generation of WO{sub 3}-ZrO{sub 2} catalysts from solid solutions of tungsten in zirconia

    SciTech Connect (OSTI)

    Cortes-Jacome, Maria A.; Angeles-Chavez, Carlos; Bokhimi, Xim; Toledo-Antonio, J.A. . E-mail: jtoledo@imp.mx

    2006-08-15

    WO{sub 3}-ZrO{sub 2} samples were obtained by precipitating zirconium oxynitrate in presence of WO{sub 4} {sup =} species in solution from ammonium metatungstate at pH=10.0. Samples were characterized by atomic absorption spectroscopy, thermal analysis, X-ray diffraction, Raman spectroscopy, X-ray photoelectron spectroscopy, high-resolution transmission electron microscopy and energy filtered-TEM. The ammonia retained in the dried sample produced a reductive atmosphere to generate W{sup 5+} ions coexisting with W{sup 6+} ions to produce a solid solution of tungsten in the zirconia lattice to stabilize the zirconia tetragonal phase when the sample was annealed at 560 deg. C. When the sample was annealed at 800 deg. C, the W atoms near crystallite surface were oxidized to W{sup 6+}, producing patches of WO{sub 3} on the zirconia crystallite. The HR-TEM analysis confirmed the existence of the solid solution when the sample was annealed at 560 deg. C, and two types of crystalline regions were identified: One with nearly spherical morphology, an average diameter of 8 nm and the atomic distribution of tetragonal zirconia. The second one had a non-spherical morphology with well-faceted faces and dimensions larger than 30 nm, and the atom distribution of tetragonal zirconia. When samples were annealed at 800 deg. C two different zirconia crystallites were formed: Those where only part of the dissolved tungsten atoms segregated to crystallite surface producing patches of nanocrystalline WO{sub 3} on the crystallite surface of tetragonal zirconia stabilized with tungsten. The second type corresponded to monoclinic zirconia crystallites with patches of nanocrystalline WO{sub 3} on their surface. The tungsten segregation gave rise to the WO{sub 3}-ZrO{sub 2} catalysts. - Graphical abstract: WO {sub x} -ZrO{sub 2} catalysts were obtained by precipitating zirconium oxynitrate in presence of WO{sub 4} {sup =}species. Initially, the W atoms remained inside the crystallite after annealing at 560 deg. C in a reduced oxidation state (W{sup 5+}), whereas, the sample annealed at 800 deg. C, the W atoms migrate from the bulk to the surface, forming a layer of W atoms on a ZrO{sub 2} core, with the consequent oxidation to W{sup 6+}, producing patches of nanocrystalline WO{sub 3} with dimension smaller than 3 nm.

  9. Microstructure evolution of Al/Mg butt joints welded by gas tungsten arc with Zn filler metal

    SciTech Connect (OSTI)

    Liu Fei; Zhang Zhaodong; Liu Liming, E-mail: liulm@dlut.edu.cn

    2012-07-15

    Based on the idea of alloying welding seam, Gas tungsten arc welding method with pure Zn filler metal was chosen to join Mg alloy and Al alloy. The microstructures, phases, element distribution and fracture morphology of welding seams were examined. The results indicate that there was a transitional zone in the width of 80-100 {mu}m between the Mg alloy substrate and fusion zone. The fusion zone was mainly composed of MgZn{sub 2}, Zn-based solid solution and Al-based solid solution. The welding seam presented distinct morphology in different location owning to the quite high cooling rate of the molten pool. The addition of Zn metal could prevent the formation of Mg-Al intermetallics and form the alloyed welding seam during welding. Therefore, the tensile strengths of joints have been significantly improved compared with those of gas tungsten arc welded joints without Zn metal added. Highlights: Black-Right-Pointing-Pointer Mg alloy AZ31B and Al alloy 6061 are welded successfully. Black-Right-Pointing-Pointer Zinc wire is employed as a filler metal to form the alloyed welding seam. Black-Right-Pointing-Pointer An alloyed welding seam is benefit for improving of the joint tensile strength.

  10. Mechanochemical synthesis of tungsten carbide nano particles by using WO{sub 3}/Zn/C powder mixture

    SciTech Connect (OSTI)

    Hoseinpur, Arman; Vahdati Khaki, Jalil; Marashi, Maryam Sadat

    2013-02-15

    Graphical abstract: Display Omitted Highlights: ? Nano particles of WC are synthesized by mechanochemical process. ? Zn was used to reduce WO{sub 3}. ? By removing ZnO from the milling products with an acid leaching, WC will be the final products. ? XRD results showed that the reduction reactions were completed after 36 h. ? TEM and SEM images showed that the morphology of produced powder is nearly spherical like. -- Abstract: In this research we introduce a new, facile, and economical system for fabrication of tungsten carbide (WC) nano particle powder. In this system WO{sub 3}, Zn, and C have been ball-milled for several hours, which led to the synthesis of tungsten carbide nano particles. The synthesized WC can successfully be separated from the ball-milled product by subjecting the product powder to diluted HCl for removing ZnO and obtaining WC. X-ray diffraction (XRD) analysis indicates that the reduction of WO{sub 3} will be completed gradually by increasing milling time up to 36 h. Scanning electron microscope (SEM), and transmission electron microscope (TEM) images show that after 36 h of milling the particle size of the fabricated powder is nano metric (about 20 nm). Results have shown that this system can surmount some main problems occurred in previous similar WC synthesizing systems. For example carbothermic reduction reactions, which lead to the synthesis of W{sub 2}C instead of WC, would not be activated because in this system reactions take place gradually.

  11. Influence of substrate properties and annealing temperature on the stress state of magnetron sputtered tungsten thin films

    SciTech Connect (OSTI)

    Oliveira, J. C.; Cavaleiro, A.

    2006-11-15

    The influence of substrate properties and annealing temperature on the stress state of tungsten thin films deposited by dc reactive magnetron sputtering was studied using 310 steel (AISI), Fecralloy registered and Invar registered substrates. Besides elemental tungsten, only residual amounts of contamination elements (O, C, Ar, etc.) were detected by electron probe microanalysis. Only the {alpha}-W crystalline structure, with a preferential <110> orientation, was detected in all the films by x-ray diffraction. The highest lattice parameters were measured for the films deposited on 310 steel substrates, while the smallest values were obtained for the films deposited on Invar registered substrates. These results are closely related to the thermal expansion coefficients of the substrates. All the as-deposited films were in a compressive stress state independent of the substrate type (-3 GPa for 310 steel and Fecralloy registered substrates and -2 GPa for Invar registered substrates). The residual compressive stresses of the films deposited on Fecralloy registered substrates strongly decrease with annealing temperatures up to {approx_equal}-8 GPa at 1175 K. This result shows that the measured compressive stresses are not real, and they are a direct consequence of plastic deformation of the substrate. On the contrary, the compressive stresses measured in the films deposited on Invar registered and 310 steel substrates are real as plastic deformation of the substrates is not observed.

  12. Protonation Studies of a Tungsten Dinitrogen Complex Supported by a Diphosphine Ligand Containing a Pendant Amine

    SciTech Connect (OSTI)

    Weiss, Charles J.; Egbert, Jonathan D.; Chen, Shentan; Helm, Monte L.; Bullock, R. Morris; Mock, Michael T.

    2014-05-12

    Treatment of trans-[W(N2)2(dppe)(PEtNMePEt)] (dppe = Ph2PCH2CH2PPh2; PEtNMePEt = Et2PCH2N(Me)CH2PEt2) with three equivalents of tetrafluoroboric acid (HBF4?Et2O) at -78 C generated the seven-coordinate tungsten hydride trans-[W(N2)2(H)(dppe)(PEtNMePEt)][BF4]. Depending on the temperature of the reaction, protonation of a pendant amine is also observed, affording trans-[W(N2)2(H)(dppe)(PEtNMe(H)PEt)][BF4]2, with formation of the hydrazido complex, [W(NNH2)(dppe)(PEtNMe(H)PEt)][BF4]2, as a minor product. Similar product mixtures were obtained using triflic acid (HOTf). Upon acid addition to the carbonyl analogue, cis-[W(CO)2(dppe)(PEtNMePEt)], the seven-coordinate carbonyl-hydride complex, trans-[W(CO)2(H)(dppe)(PEtN(H)MePEt)][OTf]2 was generated. The mixed diphosphine complex without the pendant amine in the ligand backbone, trans-[W(N2)2(dppe)(depp)] (depp = Et2P(CH2)3PEt2), was synthesized and treated with HBF4?Et2O, selectively generating a hydrazido complex, [W(NNH2)(F)(dppe)(depp)][BF4]. Computational analysis was used to probe proton affinity of three sites of protonation, the metal, pendant amine, and N2 ligand in these complexes. Room temperature reactions with 100 equivalents of HOTf produced NH4+ from reduction of the N2 ligand (electrons come from W). The addition of 100 equivalents HOTf to trans-[W(N2)2(dppe)(PEtNMePEt)] afforded 0.88 0.02 equivalents NH4+, while 0.36 0.02 equivalents of NH4+was formed upon treatment of trans-[W(N2)2(dppe)(depp)], the complex without the pendant amine. This work was supported as part of the Center for Molecular Electrocatalysis, an Energy Frontier Research Center funded by the U.S. Department of Energy Office of Science, Office of Basic Energy Sciences. Computational resources were provided by the National Energy Research Scientific Computing Center (NERSC) at Lawrence Berkeley National Laboratory. Pacific Northwest National Laboratory is operated by Battelle for DOE.

  13. Analysis of a tungsten sputtering experiment in DIII-D and code/data validation of high redeposition/reduced erosion

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Wampler, William R.; Brooks, J. N.; Elder, J. D.; McLean, A. G.; Rudakov, D. L.; Stangeby, P. C.

    2015-03-29

    We analyze a DIII-D tokamak experiment where two tungsten spots on the removable DiMES divertor probe were exposed to 12 s of attached plasma conditions, with moderate strike point temperature and density (~20 eV, ~4.5 × 1019 m–3), and 3% carbon impurity content. Both very small (1 mm diameter) and small (1 cm diameter) deposited samples were used for assessing gross and net tungsten sputtering erosion. The analysis uses a 3-D erosion/redeposition code package (REDEP/WBC), with input from a diagnostic-calibrated near-surface plasma code (OEDGE), and with focus on charge state resolved impinging carbon ion flux and energy. The tungsten surfacesmore » are primarily sputtered by the carbon, in charge states +1 to +4. We predict high redeposition (~75%) of sputtered tungsten on the 1 cm spot—with consequent reduced net erosion—and this agrees well with post-exposure DiMES probe RBS analysis data. As a result, this study and recent related work is encouraging for erosion lifetime and non-contamination performance of tokamak reactor high-Z plasma facing components.« less

  14. Tungsten carbide/porous carbon composite as superior support for platinum catalyst toward methanol electro-oxidation

    SciTech Connect (OSTI)

    Jiang, Liming; Fu, Honggang; Wang, Lei; Mu, Guang; Jiang, Baojiang; Zhou, Wei; Wang, Ruihong

    2014-01-01

    Graphical abstract: The WC nanoparticles are well dispersed in the carbon matrix. The size of WC nanoparticles is about 30 nm. It can be concluded that tungsten carbide and carbon composite was successfully prepared by the present synthesis conditions. - Highlights: The WC/PC composite with high specific surface area was prepared by a simple way. The Pt/WC/PC catalyst has superior performance toward methanol electro-oxidation. The current density for methanol electro-oxidation is as high as 595.93 A g{sup ?1} Pt. The Pt/WC/PC catalyst shows better durability and stronger CO electro-oxidation. The performance of Pt/WC/PC is superior to the commercial Pt/C (JM) catalyst. - Abstract: Tungsten carbide/porous carbon (WC/PC) composites have been successfully synthesized through a surfactant assisted evaporation-induced-assembly method, followed by a thermal treatment process. In particular, WC/PC-35-1000 composite with tungsten content of 35% synthesized at the carbonized temperature of 1000 C, exhibited a specific surface area (S{sub BET}) of 457.92 m{sup 2} g{sup ?1}. After loading Pt nanoparticles (NPs), the obtained Pt/WC/PC-35-1000 catalyst exhibits the highest unit mass electroactivity (595.93 A g{sup ?1} Pt) toward methanol electro-oxidation, which is about 2.6 times as that of the commercial Pt/C (JM) catalyst. Furthermore, the Pt/WC/PC-35-1000 catalyst displays much stronger resistance to CO poisoning and better durability toward methanol electrooxidation compared with the commercial Pt/C (JM) catalyst. The high electrocatalytic activity, strong poison-resistivity and good stability of Pt/WC/PC-35-1000 catalyst are attributed to the porous structures and high specific surface area of WC/PC support could facilitate the rapid mass transportation. Moreover, synergistic effect between WC and Pt NPs is favorable to the higher catalytic performance.

  15. High-Heat Flux Testing of Irradiated Tungsten based Materials for Fusion Applications using Infrared Plasma Arc Lamps

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Sabau, Adrian S; Ohriner, Evan Keith; Kiggans, Jr, James O; Schaich, Charles Ross; Ueda, Yoshio; Harper, David C; Katoh, Yutai; Snead, Lance Lewis; Byun, Thak Sang

    2014-01-01

    Testing of advanced materials and component mock-ups under prototypical fusion high-heat flux conditions, while historically a mainstay of fusion research has proved challenging, especially for irradiated materials. A new high-heat flux testing facility based on water-wall Plasma Arc Lamps (PALs) is now being used for materials and small component testing. Two PAL systems, utilizing a 12,000 C plasma arc contained in a quartz tube cooled by a spiral water flow over the inside tube surface, are currently in use. The first PAL system provides a maximum incident heat flux of 4.2 MW/m2 over an area of 9x12 cm2. The secondmore » PAL available at ORNL provides a maximum incident heat flux of 27 MW/m2 over an area of 1x10 cm2. The absorbed heat fluxes into a tungsten target for the two PALs are approximately 1.97 and 12.7 MW/m2, respectively. This paper will present the overall design of the new PAL facilities as well as the design and implementation of the Irradiated Material Target Station (IMTS). The IMTS is primarily designed for testing the effects of heat flux or thermal cycling on material coupons of interested, such as those for plasma facing components. Moreover, IMTS designs are underway to extend the testing of small mock-ups for assessing the combined heating and thermomechanical effects of cooled, irradiated components. For the testing of material coupons , the specimens are placed in a shallow recess within the molybdenum holder that is attached to a water-cooled copper alloy rod. As the measurement of the specimen temperature for PAL is historically challenging since traditional approaches of temperature measurement cannot be employed due to the infrared heating and proximity of the PAL reflector to the specimen that does not allow a direct line of site, experiments for temperature calibration are presented. Finally, results for the high-heat flux testing of tungsten-based materials using the PAL are presented. As a demonstration of the system, results will be shown of thermal fatigue and high-heat flux testing of tungsten coupon specimens that were neutron irradiated in the HFIR reactor to neutron dose consistent to ITER lifetime.« less

  16. High-Heat Flux Testing of Irradiated Tungsten based Materials for Fusion Applications using Infrared Plasma Arc Lamps

    SciTech Connect (OSTI)

    Sabau, Adrian S; Ohriner, Evan Keith; Kiggans Jr, James O; Schaich, Charles Ross; Ueda, Yoshio; Harper, David C; Katoh, Yutai; Snead, Lance Lewis; Byun, Thak Sang

    2014-01-01

    Testing of advanced materials and component mock-ups under prototypical fusion high-heat flux conditions, while historically a mainstay of fusion research has proved challenging, especially for irradiated materials. A new high-heat flux testing facility based on water-wall Plasma Arc Lamps (PALs) is now being used for materials and small component testing. Two PAL systems, utilizing a 12,000 C plasma arc contained in a quartz tube cooled by a spiral water flow over the inside tube surface, are currently in use. The first PAL system provides a maximum incident heat flux of 4.2 MW/m2 over an area of 9x12 cm2. The second PAL available at ORNL provides a maximum incident heat flux of 27 MW/m2 over an area of 1x10 cm2. The absorbed heat fluxes into a tungsten target for the two PALs are approximately 1.97 and 12.7 MW/m2, respectively. This paper will present the overall design of the new PAL facilities as well as the design and implementation of the Irradiated Material Target Station (IMTS). The IMTS is primarily designed for testing the effects of heat flux or thermal cycling on material coupons of interested, such as those for plasma facing components. Moreover, IMTS designs are underway to extend the testing of small mock-ups for assessing the combined heating and thermomechanical effects of cooled, irradiated components. For the testing of material coupons , the specimens are placed in a shallow recess within the molybdenum holder that is attached to a water-cooled copper alloy rod. As the measurement of the specimen temperature for PAL is historically challenging since traditional approaches of temperature measurement cannot be employed due to the infrared heating and proximity of the PAL reflector to the specimen that does not allow a direct line of site, experiments for temperature calibration are presented. Finally, results for the high-heat flux testing of tungsten-based materials using the PAL are presented. As a demonstration of the system, results will be shown of thermal fatigue and high-heat flux testing of tungsten coupon specimens that were neutron irradiated in the HFIR reactor to neutron dose consistent to ITER lifetime.

  17. Evaluation of vost and semivost methods for halogenated compounds in the Clean Air Act amendments title III. Validation study at fossil fuel plant

    SciTech Connect (OSTI)

    Jackson, M.D.; Knoll, J.E.; Midgett, M.R.; McGaughey, J.F.; Bursey, J.T.

    1993-01-01

    The Clean Air Act Amendments of 1990 (CAAA), Title III, present a need for stationary source sampling and analytical methods for the list of 189 toxic air pollutants. The US Environmental Protection Agency (EPA) has used VOST and SemiVOST sampling and analytical methods for a wide variety of volatile and semivolatile organic compounds in the past, but these methodologies have been completely validated for only a few of the organic compounds. The applicability of VOST and SemiVOST techniques to the halogenated organic compounds listed in Title III of the Clean Air Act Amendments of 1990 has been evaluated under laboratory conditions for chromatographic separation, mass spectrometric response, sorbent recovery and analytical method detection limit. Dynamic spiking techniques for the sampling trains (both gaseous and liquid dynamic spiking) were also evaluated in the laboratory. In the study, the VOST and SemiVOST methods were evaluated in the field at a fossil fuel power plant. The source was selected to provide actual stationary source emissions with the compounds of interest present in trace amounts or not present. The paper presents the results of the field validation of the VOST and SemiVOST sampling and analytical methods.

  18. Comparison of Bacillus atrophaeus spore viability following exposure to detonation of C4 and to deflagration of halogen-containing thermites

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Tringe, J. W.; Letant, S. E.; Dugan, L. C.; Levie, H. W.; Kuhl, A. L.; Murphy, G. A.; Alves, S. W.; Vandersall, K. S.; Pantoya, M. L.

    2013-12-17

    We found that energetic materials are being considered for the neutralization of spore-forming bacteria. In this study, the neutralization effects of a monomolecular explosive were compared to the effects of halogen-containing thermites. Bacillus atrophaeus spores were exposed to the post-detonation environment of a 100 g charge of the military explosive C-4 at a range of 50 cm. These tests were performed in the thermodynamically closed environment of a 506-l barometric calorimeter. Associated temperatures were calculated using a thermodynamic model informed by calculations with the Cheetah thermochemicalcode. Temperatures in the range of 2300–2800 K were calculated to persist for nearly themore » full 4 ms pressure observation time. After the detonation event, spores were characterized using optical microscopy and the number of viable spores was assessed. These results showed live spore survival rates in the range of 0.01%–1%. For the thermite tests, a similar, smaller-scale configuration was employed that examined the spore neutralization effects of two thermites: aluminum with iodine pentoxide andaluminum with potassium chlorate. Only the former mixture resulted in spore neutralization. Our results indicate that the detonation environment produced by an explosive with no chemical biocides may provide effective spore neutralization similar to a deflagrating thermite containing iodine.« less

  19. Abnormal macropore formation during double-sided gas tungsten arc welding of magnesium AZ91D alloy

    SciTech Connect (OSTI)

    Shen Jun You Guoqiang; Long Siyuan; Pan Fusheng

    2008-08-15

    One of the major concerns during gas tungsten arc (GTA) welding of cast magnesium alloys is the presence of large macroporosity in weldments, normally thought to occur from the presence of gas in the castings. In this study, a double-sided GTA welding process was adopted to join wrought magnesium AZ91D alloy plates. Micropores were formed in the weld zone of the first side that was welded, due to precipitation of H{sub 2} as the mushy zone freezes. When the reverse side was welded, the heat generated caused the mushy zone in the initial weld to reform. The micropores in the initial weld then coalesced and expanded to form macropores by means of gas expansion through small holes that are present at the grain boundaries in the partially melted zone. Macropores in the partially melted zone increase with increased heat input, so that when a filler metal is used the macropores are smaller in number and in size.

  20. Multiscale Modeling of Grain Boundary Segregation and Embrittlement in Tungsten for Mechanistic Design of Alloys for Coal Fired Plants

    SciTech Connect (OSTI)

    Luo, Jian; Tomar, Vikas; Zhou, Naixie; Lee, Hongsuk

    2013-06-30

    Based on a recent discovery of premelting-like grain boundary segregation in refractory metals occurring at high temperatures and/or high alloying levels, this project investigated grain boundary segregation and embrittlement in tungsten (W) based alloys. Specifically, new interfacial thermodynamic models have been developed and quantified to predict high-temperature grain boundary segregation in the W-Ni binary alloy and W-Ni-Fe, W-Ni-Ti, W-Ni-Co, W-Ni-Cr, W-Ni-Zr and W-Ni-Nb ternary alloys. The thermodynamic modeling results have been experimentally validated for selected systems. Furthermore, multiscale modeling has been conducted at continuum, atomistic and quantum-mechanical levels to link grain boundary segregation with embrittlement. In summary, this 3-year project has successfully developed a theoretical framework in combination with a multiscale modeling strategy for predicting grain boundary segregation and embrittlement in W based alloys.

  1. Sambamurti Memorial Lecture: Spotlight on the Gluon

    ScienceCinema (OSTI)

    Michael Begelas

    2010-09-01

    Begel uses results from the Fermilab D0 and E706 experiments to explain how the production rate and energy spectrum of photons produced during proton collisions helped to clarify how the energy inside the proton is shared between quarks and gluons.

  2. Employee Spotlight: Beth Drewniak | Argonne National Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Contest --Science Careers in Search of Women -Site environmental protection --Site waste management -Site sustainability Operations -Business diversity -Technology transfer...

  3. Intern Spotlight: Kevin Banks | Argonne National Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Kevin Banks is a freshman at the Milwaukee School of Engineering, where he studies biomedical engineering. As an intern within the Chicago Scholars Argonne Future Research...

  4. Intern Spotlight: Gabrielle Kane | Argonne National Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    the different potential accidents. For example, maybe the vent is blocked with trash debris or there is a backflow from the sump pump. I created a fault tree to organize...

  5. Employee Spotlight: Ali Erdemir | Argonne National Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    to learn how to actually do research and adapt a very high-caliber research culture.'" To watch the video, click on the image at right. Ali Erdemir is an Argonne...

  6. spotlight1115 | netl.doe.gov

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    NETL Director Grace Bochenek told them that, contrary to some perceptions, the game is not over for coal and fossil energy and, with the innovation that continues at...

  7. Employee Spotlight: José Valdez

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    José Valdez José Valdez-Cherishing classic cars Find José Valdez in his garage, intensely focused on his hobby of refurbishing classic cars, preferably from the 1930s to early 1960s. June 24, 2014 José Valdez José Valdez "I used to help my dad in his body shop when I was a kid," Valdez explains, "and today my brother James is a car mechanic and my brother Bento runs a paint and body shop like our dad. Cars are in our blood." Most evenings, and certainly most weekends,

  8. Solar Decathlon Technology Spotlight: Structural Insulated Panels...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Panels September 20, 2011 - 7:13am Addthis These structural insulated panels consist of foam insulation sandwiched between oriented strand boards. (Courtesy of Michael Bacchler)...

  9. Employee Spotlight: Ann Schlenker | Argonne National Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Ann Schlenker Share Description nn Schlenker, Director of the Center for Transportation Research, discusses working and mentoring at Argonne. Duration 1:48 Topic Energy Energy efficiency Vehicles

  10. Employee Spotlight: Carolyn Phillips | Argonne National Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Carolyn Phillips Share Topic Operations Human Resources Diversity Programs Mathematics, computing, & computer science Browse By - Any - Energy -Energy efficiency --Vehicles ---Alternative fuels ---Automotive engineering ---Diesel ---Electric drive technology ---Hybrid & electric vehicles ---Hydrogen & fuel cells ---Internal combustion ---Powertrain research --Building design ---Construction --Manufacturing -Energy sources --Renewable energy ---Bioenergy ---Solar energy --Fossil fuels

  11. Employee Spotlight: José Valdez

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    José Valdez June 24, 2014 Most evenings, and certainly most weekends, find José Valdez in his garage, intensely focused on his hobby of refurbishing classic cars, preferably from the 1930s to early 1960s. By day a technician in the Nuclear Engineering and Nonproliferation Division, Valdez enjoys all aspects of the car restoration process, from finding an old, beat-up wreck sitting neglected in someone's backyard to putting the poor thing on his jack stand to see how much work it will take to

  12. Shining a spotlight on intact proteins

    SciTech Connect (OSTI)

    Pasa-Tolic, Ljiljana; Masselon, Christophe

    2014-05-01

    Cells react to cues from their environment using various mechanisms that include changes in metabolites, gene expression, protein binding partners, protein localization, and protein posttranslational modifications (PTMs), all of which contribute to altered cellular signatures that enable appropriate cellular responses. Given the seemingly infinite number of mechanisms available to affect protein function and modulate biological processes, the question arises as to how cells manage to interpret protein readouts to accomplish the appropriate cell-type specific response to a particular stimulus.

  13. Employee Spotlight: Jennifer Hogan | Argonne National Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    --Photosynthesis & biomimetics -Materials science --Complex oxides --Nanoscience --Materials simulation & theory --Surface & interface studies --Tribology -Mathematics,...

  14. High Performance Builder Spotlight: Baldwin Homes Inc.

    SciTech Connect (OSTI)

    2011-01-01

    Baldwin Homes of Arnold, Maryland, built a HERS 55 Builders Challenge-certified house as an Eco-Model home to showcase 69 green and energy-efficient features.

  15. Workers' Spotlight Newsletters | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ... May 2013 issue covers BTMed takes aim at COPD, Lung Cancer and Pantex Former Worker ... Remembrance, Secure Electronic Records Transfer (SERT), and Early Lung Cancer Detection.

  16. Employee Spotlight: Sarah Soltau | Argonne National Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Diana Anderson at media@anl.gov or (630) 252-4593. Connect Find an Argonne expert by subject. Follow Argonne on Twitter, Facebook, Google+ and LinkedIn. For inquiries on...

  17. Intern Spotlight: Elise Burton | Argonne National Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Diana Anderson at media@anl.gov or (630) 252-4593. Connect Find an Argonne expert by subject. Follow Argonne on Twitter, Facebook, Google+ and LinkedIn. For inquiries on...

  18. High Performance Builder Spotlight: Green Coast Enterprises ...

    Energy Savers [EERE]

    Solutions for New Homes: Green Coast Enterprises, New Orleans, Louisiana Building America Best Practices Series Volume 15: 40% Whole-House Energy Savings in the Hot-Humid ...

  19. High Performance Builder Spotlight: Clifton View Homes

    SciTech Connect (OSTI)

    2011-01-01

    Clifton View Homess remodel of a 1962 rambler, on Whidbey Island in Washington State, cut energy costs by two-thirds.

  20. High Performance Builder Spotlight: Imagine Homes

    SciTech Connect (OSTI)

    2011-01-01

    Imagine Homes, working with the DOE's Building America research team member IBACOS, has developed a system that can be replicated by other contractors to build affordable, high-performance homes. Imagine Homes has used the system to produce more than 70 Builders Challenge-certified homes per year in San Antonio over the past five years.

  1. High Performance Builder Spotlight: Treasure Homes Inc.

    SciTech Connect (OSTI)

    2011-01-01

    Treasure Homes, Inc., achieved a HERS rating of 46 without PV on its prototype Gem home, located on the shores of Lake Michigan in northern Indiana, thanks in part to training received from a Building America partner, the National Association of Home Builders Research Center.

  2. Solar Decathlon Technology Spotlight: Structural Insulated Panels

    Broader source: Energy.gov [DOE]

    Structural insulated panels (SIPs) are prefabricated structural elements used to build walls, ceilings, floors, and roofs.

  3. Employee Spotlight: Ali Erdemir | Argonne National Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Ali Erdemir Share Topic Operations Business diversity Human Resources Programs Materials science Nanoscience Tribology...

  4. LANFILGAS(sm) process. Technology spotlight report

    SciTech Connect (OSTI)

    1995-08-01

    The United States is facing a garbage crisis. Several areas of the country have already run out of landfill space, and recent studies indicate that many other areas will be experiencing the same problem with the next ten years. Institute of Gas Technology (IGT) has patented an advanced biogasification technology called LANFILGAS that accelerates the stabilization of landfills through anaerobic composting and recovers the methane gas for its energy value. Anaerobic composting, or digestion, is a natural process that takes place in every landfill. It is generally uncontrolled, however, and can take up to 30 years to stabilize a landfill.

  5. Tungsten-rhenium composite tube fabricated by CVD for application in 1800/sup 0/C high thermal efficiency fuel processing furnace

    SciTech Connect (OSTI)

    Svedberg, R.C.; Bowen, W.W.; Buckman, R.W. Jr.

    1980-04-01

    Chemical Vapor Deposit (CVD) rhenium was selected as the muffle material for an 1800/sup 0/C high thermal efficiency fuel processing furnace. The muffle is exposed to high vacuum on the heater/insulation/instrumentation side and to a flowing argon-8 V/0 hydrogen gas mixture at one atmosphere pressure on the load volume side. During operation, the muffle cycles from room temperature to 1800/sup 0/C and back to room temperature once every 24 hours. Operational life is dependent on resistance to thermal fatigue during the high temperature exposure. For a prototypical furnace, the muffle is approximately 13 cm I.D. and 40 cm in length. A small (about one-half size) rhenium closed end tube overcoated with tungsten was used to evaluate the concept. The fabrication and testing of the composite tungsten-rhenium tube and prototypic rhenium muffle is described.

  6. A multi-technique analysis of deuterium trapping and near-surface precipitate growth in plasma-exposed tungsten

    SciTech Connect (OSTI)

    Kolasinski, Robert; Shimada, Masashi; Oya, Yasuhisa; Buchenauer, Dean A.; Chikada, Takumi; Cowgill, Donald F.; Donovan, David; Friddle, Raymond William; Michibayashi, Katsu; Sato, Misaki

    2015-08-17

    We examine how deuterium becomes trapped in plasma-exposed tungsten and forms near-surface platelet-shaped precipitates. How these bubbles nucleate and grow, as well as the amount of deuterium trapped within, is crucial for interpreting the experimental database. Here, we use a combined experimental/theoretical approach to provide further insight into the underlying physics. With the Tritium Plasma Experiment, we exposed a series of ITER-gradetungsten samples to high flux D plasmas (up to 1.5 1022 m-2 s-1) at temperatures ranging between 103 and 554 C. Retention of deuterium trapped in the bulk, assessed through thermal desorption spectrometry, reached a maximum at 230 C and diminished rapidly thereafter for T > 300 C. Post-mortem examination of the surfaces revealed non-uniform growth of bubbles ranging in diameter between 1 and 10 ?m over the surface with a clear correlation with grain boundaries. Electron back-scattering diffraction maps over a large area of the surface confirmed this dependence; grains containing bubbles were aligned with a preferred slip vector along the <111> directions. Focused ion beam profiles suggest that these bubbles nucleated as platelets at depths of 200 nm1 ?m beneath the surface and grew as a result of expansion of sub-surface cracks. Furthermore, to estimate the amount of deuterium trapped in these defects relative to other sites within the material, we applied a continuum-scale treatment of hydrogen isotope precipitation. Additionally, we propose a straightforward model of near-surface platelet expansion that reproduces bubble sizes consistent with our measurements. For the tungsten microstructure considered here, we find that bubbles would only weakly affect migration of D into the material, perhaps explaining why deep trapping was observed in prior studies with plasma-exposed neutron-irradiated specimens. We foresee no insurmountable issues that would prevent the theoretical framework developed here from being extended to a broader range of systems where precipitation of insoluble gases in ion beam or plasma-exposed metals is of interest.

  7. A multi-technique analysis of deuterium trapping and near-surface precipitate growth in plasma-exposed tungsten

    SciTech Connect (OSTI)

    Kolasinski, Robert; Shimada, Masashi; Oya, Yasuhisa; Buchenauer, Dean A.; Chikada, Takumi; Cowgill, Donald F.; Donovan, David; Friddle, Raymond William; Michibayashi, Katsu; Sato, Misaki

    2015-08-17

    We examine how deuterium becomes trapped in plasma-exposed tungsten and forms near-surface platelet-shaped precipitates. How these bubbles nucleate and grow, as well as the amount of deuterium trapped within, is crucial for interpreting the experimental database. Here, we use a combined experimental/theoretical approach to provide further insight into the underlying physics. With the Tritium Plasma Experiment, we exposed a series of ITER-gradetungsten samples to high flux D plasmas (up to 1.5 × 1022 m-2 s-1) at temperatures ranging between 103 and 554 °C. Retention of deuterium trapped in the bulk, assessed through thermal desorption spectrometry, reached a maximum at 230 °C and diminished rapidly thereafter for T > 300 °C. Post-mortem examination of the surfaces revealed non-uniform growth of bubbles ranging in diameter between 1 and 10 μm over the surface with a clear correlation with grain boundaries. Electron back-scattering diffraction maps over a large area of the surface confirmed this dependence; grains containing bubbles were aligned with a preferred slip vector along the <111> directions. Focused ion beam profiles suggest that these bubbles nucleated as platelets at depths of 200 nm–1 μm beneath the surface and grew as a result of expansion of sub-surface cracks. Furthermore, to estimate the amount of deuterium trapped in these defects relative to other sites within the material, we applied a continuum-scale treatment of hydrogen isotope precipitation. Additionally, we propose a straightforward model of near-surface platelet expansion that reproduces bubble sizes consistent with our measurements. For the tungsten microstructure considered here, we find that bubbles would only weakly affect migration of D into the material, perhaps explaining why deep trapping was observed in prior studies with plasma-exposed neutron-irradiated specimens. We foresee no insurmountable issues that would prevent the theoretical framework developed here from being extended to a broader range of systems where precipitation of insoluble gases in ion beam or plasma-exposed metals is of interest.

  8. A multi-technique analysis of deuterium trapping and near-surface precipitate growth in plasma-exposed tungsten

    DOE Public Access Gateway for Energy & Science Beta (PAGES Beta)

    Kolasinski, Robert; Shimada, Masashi; Oya, Yasuhisa; Buchenauer, Dean A.; Chikada, Takumi; Cowgill, Donald F.; Donovan, David; Friddle, Raymond William; Michibayashi, Katsu; Sato, Misaki

    2015-08-17

    We examine how deuterium becomes trapped in plasma-exposed tungsten and forms near-surface platelet-shaped precipitates. How these bubbles nucleate and grow, as well as the amount of deuterium trapped within, is crucial for interpreting the experimental database. Here, we use a combined experimental/theoretical approach to provide further insight into the underlying physics. With the Tritium Plasma Experiment, we exposed a series of ITER-gradetungsten samples to high flux D plasmas (up to 1.5 × 1022 m-2 s-1) at temperatures ranging between 103 and 554 °C. Retention of deuterium trapped in the bulk, assessed through thermal desorption spectrometry, reached a maximum at 230more » °C and diminished rapidly thereafter for T > 300 °C. Post-mortem examination of the surfaces revealed non-uniform growth of bubbles ranging in diameter between 1 and 10 μm over the surface with a clear correlation with grain boundaries. Electron back-scattering diffraction maps over a large area of the surface confirmed this dependence; grains containing bubbles were aligned with a preferred slip vector along the <111> directions. Focused ion beam profiles suggest that these bubbles nucleated as platelets at depths of 200 nm–1 μm beneath the surface and grew as a result of expansion of sub-surface cracks. Furthermore, to estimate the amount of deuterium trapped in these defects relative to other sites within the material, we applied a continuum-scale treatment of hydrogen isotope precipitation. Additionally, we propose a straightforward model of near-surface platelet expansion that reproduces bubble sizes consistent with our measurements. For the tungsten microstructure considered here, we find that bubbles would only weakly affect migration of D into the material, perhaps explaining why deep trapping was observed in prior studies with plasma-exposed neutron-irradiated specimens. We foresee no insurmountable issues that would prevent the theoretical framework developed here from being extended to a broader range of systems where precipitation of insoluble gases in ion beam or plasma-exposed metals is of interest.« less

  9. Mechanical properties and microstructures of a magnesium alloy gas tungsten arc welded with a cadmium chloride flux

    SciTech Connect (OSTI)

    Zhang, Z.D.; Liu, L.M. Shen, Y.; Wang, L.

    2008-01-15

    Gas tungsten arc (GTA) welds were prepared on 5-mm thick plates of wrought magnesium AZ31B alloy, using an activated flux. The microstructural characteristics of the weld joint were investigated using optical and scanning microscopy, and the fusion zone microstructure was compared with that of the base metal. The elemental distribution was also investigated by electron probe microanalysis (EPMA). Mechanical properties were determined by standard tensile tests on small-scale specimens. The as-welded fusion zone prepared using a CdCl{sub 2} flux exhibited a larger grain size than that prepared without flux; the microstructure consisted of matrix {alpha}-Mg, eutectic {alpha}-Mg and {beta}-Al{sub 12}Mg{sub 17}. The HAZ was observed to be slightly wider for the weld prepared with a CdCl{sub 2} flux compared to that prepared without flux; thus the tensile strength was lower for the flux-prepared weld. The fact that neither Cd nor Cl was detected in the weld seam by EPMA indicates that the CdCl{sub 2} flux has a small effect on convection in the weld pool.

  10. Aging characteristics of electron beam and gas tungsten arc fusion zones of Al-Cu-Li alloy 2090

    SciTech Connect (OSTI)

    Sunwoo, A.J. . Center for Advanced Materials); Morris, J.W. Jr. . Dept of Materials Science and Engineering)

    1991-04-01

    A transmission electron microscopy (TEM) investigation of the electron beam (EB) and gas tungsten arc (GTA) fusion zones of 2090 indicates that in both the as-welded and aged conditions, the EB and GTA fusion zones lack the volume fraction and the homogeneity of strengthening precipitates found in the base metal. In the underaged and peak-aged conditions, the [delta][prime] phase is the primary strengthener, the volume fraction of T[sub 1] present being too low to be effective. The T[sub 1] precipitates are found either in the vicinity of other inclusions or at the dendrite boundaries. As the strength increases with postweld aging, the elongation decreased to 1%. The presence of the boundary phases and Cu- and Cl-containing inclusions at the boundaries leads to poor elongation. The joint efficiencies of the peak-aged EB and GTA weldments (EBWs and GTAWs, respectively) are 75 and 55% at 293 K and 75 and 50% at 77 K, respectively. Both EBWs and GTAWs have relatively low elongations.

  11. Microstructure formation in partially melted zone during gas tungsten arc welding of AZ91 Mg cast alloy

    SciTech Connect (OSTI)

    Zhu Tianping Chen, Zhan W.; Gao Wei

    2008-11-15

    During gas tungsten arc (GTA) welding of AZ91 Mg cast alloy, constitutional liquid forms locally in the original interdendritic regions in the partially melted zone (PMZ). The PMZ re-solidification behaviour has not been well understood. In this study, the gradual change of the re-solidification microstructure within PMZ from base metal side to weld metal side was characterised. High cooling rate experiments using Gleeble thermal simulator were also conducted to understand the morphological change of the {alpha}-Mg/{beta}-Mg{sub 17}Al{sub 12} phase interface formed during re-solidification after partial melting. It was found that the original partially divorced eutectic structure has become a more regular eutectic phase in most of the PMZ, although close to the fusion boundary the re-solidified eutectic is again a divorced one. Proceeding the eutectic re-solidification, if the degree of partial melting is sufficiently high, {alpha}-Mg re-solidified with a cellular growth, resulting in a serrated interface between {alpha}-Mg and {alpha}-Mg/{beta}-Mg{sub 17}Al{sub 12} in the weld sample and between {alpha}-Mg and {beta}-Mg{sub 17}Al{sub 12} (fully divorced eutectic) in Gleeble samples. The morphological changes affected by the peak temperature and cooling rate are also explained.

  12. Photo-controllable thermoelectric properties with reversibility and photo-thermoelectric effects of tungsten trioxide accompanied by its photochromic phenomenon

    SciTech Connect (OSTI)

    Azuma, Chiori; Kawano, Takuto; Kakemoto, Hirofumi; Irie, Hiroshi

    2014-11-07

    The addition of photo-controllable properties to tungsten trioxide (WO{sub 3}) is of interest for developing practical applications of WO{sub 3} as well as for interpreting such phenomena from scientific viewpoints. Here, a sputtered crystalline WO{sub 3} thin film generated thermoelectric power due to ultraviolet (UV) light-induced band-gap excitation and was accompanied by a photochromic reaction resulting from generating W{sup 5+} ions. The thermoelectric properties (electrical conductivity (?) and Seebeck coefficient (S)) and coloration of WO{sub 3} could be reversibly switched by alternating the external stimulus between UV light irradiation and dark storage. After irradiating the film with UV light, ? increased, whereas the absolute value of S decreased, and the photochromic (coloration) reaction was detected. Notably, the opposite behavior was exhibited by WO{sub 3} after dark storage, and this reversible cycle could be repeated at least three times. Moreover, photo-thermoelectric effects (photo-conductive effect (photo-conductivity, ?{sub photo}) and photo-Seebeck effect (photo-Seebeck coefficient, S{sub photo})) were also detected in response to visible-light irradiation of the colored WO{sub 3} thin films. Under visible-light irradiation, ?{sub photo} and the absolute value of S{sub photo} increased and decreased, respectively. These effects are likely attributable to the excitation of electrons from the mid-gap visible light absorption band (W{sup 5+} state) to the conduction band of WO{sub 3}. Our findings demonstrate that the simultaneous, reversible switching of multiple properties of WO{sub 3} thin film is achieved by the application of an external stimulus and that this material exhibits photo-thermoelectric effects when irradiated with visible-light.

  13. Relaxor nature in lead-free Sr{sub 5}LaTi{sub 3}Nb{sub 7}O{sub 30} tetragonal tungsten bronze ceramics

    SciTech Connect (OSTI)

    Li Zhu, Xiao; Department of Materials and Ceramic Engineering, Centre for Research in Ceramics and Composite Materials, CICECO, University of Aveiro, 3810-193 Aveiro ; Li, Kun; Qiang Liu, Xiao; Ming Chen, Xiang; Asif Rafiq, Muhammad

    2013-09-28

    Lead-free tetragonal tungsten bronze Sr{sub 5}LaTi{sub 3}Nb{sub 7}O{sub 30} ceramics were prepared and the correlation of the relaxor nature and crystal structure was studied using dielectric spectroscopy and powder X-ray diffraction. Three dielectric relaxations were observed below the deviation temperature T{sub D}? 330 K. Relaxation I and II followed the Vogel-Fulcher law with the freezing temperatures of 189 K and ?90 K. Low temperature relaxation III, which was first observed in filled tungsten bronze, followed well the Arrhenius law. Dielectric response becomes static below 50 K. Polarization-field (P-E) hysteresis loops were evaluated from 183 K to 298 K. P{sub r} value of 0.41?C/cm{sup 2} was observed at 183 K. Deviation of lattice parameter c from the linear contraction and increasing of tetragonality (c/a ratio) were observed below T{sub D}, reflecting the structure change during the formation of polar nanoregions and the following freezing process. Opposite tendency was observed below 100 K for all the lattice parameters, corresponding to relaxation III. Generally, the main dielectric relaxation I and II were attributed to flipping and breathing of polar nanoregions along c axis, while the concerted rotations of the oxygen octahedra in the ab plane were suggested as the origin of relaxation III.

  14. Abnormal thermal conductivity in tetragonal tungsten bronze Ba{sub 6−x}Sr{sub x}Nb{sub 10}O{sub 30}

    SciTech Connect (OSTI)

    Kolodiazhnyi, T. Sakurai, H.; Vasylkiv, O.; Borodianska, H.; Mozharivskyj, Y.

    2014-03-17

    Ba{sub 6−x}Sr{sub x}Nb{sub 10}O{sub 30} solid solution with 0 ≤ x ≤ 6 crystallizes in centrosymmetric tetragonal “tungsten bronze” structure (space group P4/mbm). We report on the x dependence of thermal conductivity of polycrystalline samples measured in the 2–400 K temperature interval. Substitution of Sr for Ba brings about a significant decrease in thermal conductivity at x ≥ 3 accompanied by development of a low-temperature (T ≈ 10–30 K) “plateau” region reminiscent of a glass-like compounds. We explain this behaviour based on a size-driven site occupancy and atomic displacement parameters associated with an alkaline earth atomic positions in the title compounds.

  15. Characterization of Mg/Al butt joints welded by gas tungsten arc filling with Zn29.5Al0.5Ti filler metal

    SciTech Connect (OSTI)

    Liu, Fei; Wang, Hongyang; Liu, Liming, E-mail: liulm@dlut.edu.cn

    2014-04-01

    The multivariate alloying design of a welding joint is used in the Mg to Al welding process. A Zn29.5Al0.5Ti alloy is added as filler metal in gas tungsten arc welding of Mg and Al alloy joint based on the analysis of Al and Mg alloy characteristics. The tensile strength, microstructure, and phase constitution of the weld seam are analyzed. The formation of brittle and hard MgAl intermetallic compounds is avoided because of the effects of Zn, Al, and Ti. The average tensile strength of the joint is 148 MPa. Al{sub 3}Ti is first precipitated and functions as the nucleus of heterogeneous nucleation during solidification. Moreover, the precipitated AlMgZn{sub 2} hypoeutectic phase exhibited a feather-like structure, which enhances the property of the MgAl dissimilar joint. - Highlights: Mg alloy AZ31B and Al alloy 6061 are butt welded by fusion welding. The effect of Ti in filler metal is investigated. The formation of MgAl intermetallic compounds is avoided.

  16. Microstructural and mechanical characterization of CO{sub 2} laser and gas tungsten arc welds of an Al-Li-Cu alloy 2195

    SciTech Connect (OSTI)

    Hou, K.H.; Baeslack, W.A. III; Szabo, A.

    1994-12-31

    Lithium-containing aluminum alloys offer an attractive combination of low density and high strength and stiffness and have been the focus of vigorous research for their promising aerospace applications. To achieve the full potential advantages in using these alloys, the integrity of welded joints, both n the fusion zone and the heat-affected zone, must be ensured. In the present study, Weldalite{sup TM} 049 (designated as alloy 2195) with nominal composition of Al-1.0Li-4.0Cu-0.4Mg0.4Ag-0.14Zr (wt%) was welded autogenously using the gas tungsten-arc (GTA) and CO{sub 2} laser beam (LB) welding processes. The average ultimate tensile strengths for as-welded, 160{degrees}C/16 h-aged, and 190{degrees}C/16 h-aged GTA welds were 296.4 MPa, 304.6 MPa, and 336.8 MPa, and corresponded to joint efficiencies of 61.4%, 48.1% and 56.0%, respectively. Porosity was found occasionally in the laser welds and slightly affected the performance of the aluminum weldments. For laser welds, average ultimate tensile strengths and corresponding joint efficiencies for a-welded, 160{degrees}C/16 h-aged, and 190{degrees}C/16 h-aged weldments were 293.2 MPa (60.8%) 305.9 MPa (48.3%), and 331.0 MPa (55.0%), respectively. Scanning electron fractography revealed that failure of the GTA and LB tensile specimens occurred either within the weld metal or along the fusion boundary. The latter was related to the existence of an equiaxed band along the fusion boundary.

  17. THE PUZZLE OF TWO DIFFERENT SUB-MICROMETER TUNGSTEN-RICH DEPOSITS IN BULK YBCO: ONE ACTS AS PINNING CENTERS AND THE OTHER DOES NOT

    SciTech Connect (OSTI)

    Sawh, Ravi-Persad; Weinstein, Roy; Parks, Drew; Gandini, Alberto [Beam Particle Dynamics Laboratory, Department of Physics, and Texas Center for Superconductivity, University of Houston, Houston, Texas, 77204 (United States)

    2010-04-08

    Two types of large grain YBCO samples doped with tungsten oxide, one with platinum and the other without, were produced using a slow cooling process. Observations of the trapped magnetic flux density showed that the flux density of the W-doped, Pt-free samples did not change with W doping levels of up to 2.1 mol%. In contrast, the (W+Pt)-doped samples resulted in a monotonic improvement in trapped magnetic flux density as a function of W doping. Microstructure studies indicate that both types of samples contain profuse sub-micrometer deposits of a W-rich compound. The Pt-free samples contain (W{sub 0.4}Y{sub 0.6})BaO{sub 3} deposits while the (W+Pt)-doped samples contain deposits of a (W{sub 0.5}Pt{sub 0.5})YBa{sub 2}O{sub 6} compound. Both types of deposits are of essentially the same size and have comparable number density. The results are strikingly similar to an earlier experiment in which uranium doped, Pt-free, large grain YBCO also did not show any improvement in trapped magnetic flux density. The U-doped, Pt-free samples contain profuse sub-micrometer deposits of a (U{sub 0.4}Y{sub 0.6})BaO{sub 3} compound, which have been shown to be ferromagnetic. The inability of both the (W{sub 0.4}Y{sub 0.6})BaO{sub 3} and (U{sub 0.4}Y{sub 0.6})BaO{sub 3} sub-micrometer deposits to act as pinning centers in self-field, suggest that this behavior is systematic.

  18. SSL in America: Spotlight on SAES Pure Gas

    Energy Savers [EERE]

    Pure Gas does all of its manufacturing at its headquarters, which is located in beautiful San Luis Obispo, about halfway between Los Angeles and San Francisco and just a few...

  19. High Performance Builder Spotlight: KB Home GreenHouse

    SciTech Connect (OSTI)

    2011-01-01

    Located in the Lake Burden community in Windermere, FL, the KB Home GreenHouse is expected to produce as much energy as it consumes.

  20. Building America Research Teams: Spotlight on Alliance for Residential...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ... expertise to bridge cool energy house.jpg the gap between research and market integration. ... resulted in the implementation of the Residential Green and Energy Efficiency Addendum. ...

  1. EM Update Newsletter Spotlights River Corridor Cleanup at Hanford Site |

    Broader source: Energy.gov (indexed) [DOE]

    Department of Energy RICHLAND, Wash. - In this issue of the EM Update newsletter, EM marks the many accomplishments the Richland Operations Office and its contractors have achieved in cleanup along the Columbia River corridor at the Hanford Site. This year marked the 10th anniversary of the River Corridor Closure Contract, the nation's largest environmental cleanup closure project, managed by Washington Closure Hanford. The work has involved projects to clean up existing contamination and

  2. Isoprenoid biosynthesis in eukaryotic phototrophs: A spotlight on algae

    SciTech Connect (OSTI)

    Lohr M.; Schwender J.; Polle, J. E. W.

    2012-04-01

    Isoprenoids are one of the largest groups of natural compounds and have a variety of important functions in the primary metabolism of land plants and algae. In recent years, our understanding of the numerous facets of isoprenoid metabolism in land plants has been rapidly increasing, while knowledge on the metabolic network of isoprenoids in algae still lags behind. Here, current views on the biochemistry and genetics of the core isoprenoid metabolism in land plants and in the major algal phyla are compared and some of the most pressing open questions are highlighted. Based on the different evolutionary histories of the various groups of eukaryotic phototrophs, we discuss the distribution and regulation of the mevalonate (MVA) and the methylerythritol phosphate (MEP) pathways in land plants and algae and the potential consequences of the loss of the MVA pathway in groups such as the green algae. For the prenyltransferases, serving as gatekeepers to the various branches of terpenoid biosynthesis in land plants and algae, we explore the minimal inventory necessary for the formation of primary isoprenoids and present a preliminary analysis of their occurrence and phylogeny in algae with primary and secondary plastids. The review concludes with some perspectives on genetic engineering of the isoprenoid metabolism in algae.

  3. High Performance Builder Spotlight: GreenCraft, Lewisville, TX

    SciTech Connect (OSTI)

    2011-01-01

    In October and November 2009, the TimberCreek Zero Energy House in Lewisville, Texas, opened as a Building America Demonstration House. The 2,538-foot,three-bedroom, 2-bath custom-built home showed a home energy rating score (HERS) of 56 without the solar photovoltaics and a HERS score of 1 with PV.

  4. White House Spotlights Solar Innovation as Summit Registration...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    SunShot's director, Minh Le, will kick off the Summit. Following the kick off remarks, attendees will be able to meet the whole SunShot team and view numerous interactive ...

  5. High Performance Builder Spotlight: Wathen Castanos Hybrid Homes

    SciTech Connect (OSTI)

    2011-01-01

    Wathen Castanos Hybrid Homes of Fresno, CA, has worked with Building America team member IBACOS to apply building science to production homes. Even without solar panels, the companys Jordan model exceeds Californias building efficiency standard by 36%.

  6. High Performance Builder Spotlight: Green Coast Enterprises, New Orleans, Louisiana

    SciTech Connect (OSTI)

    Pacific Northwest National Laboratory

    2010-09-01

    This case study describes Green Coast Enterprises efforts to rebuild hurricane-ravaged New Orleans through Project Home Again.

  7. High Performance Builder Spotlight: G.W. Robinson

    SciTech Connect (OSTI)

    2011-01-01

    G.W. Robinson of Gainesville, Florida, worked with Building America partners Florida Solar Energy Center and Florida HERO to achieve a true net zero energy home in 2010.

  8. High Performance Builder Spotlight: LifeStyle Homes

    SciTech Connect (OSTI)

    2011-01-01

    LifeStyle Homes of Melbourne, Florida, is aiming for affordable net zero energy homes with help from Building America research partner Florida Solar Energy Center.

  9. Hydrogen Production by PEM Electrolysis: Spotlight on Giner and...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    PEM electrolyzers http:www.protononsite.comtechnologyhydrogen- fueling-systems.html 5 Electrolysis: Benefits and Challenges http:www1.eere.energy.govhydrogenandfuelcells...

  10. Builders Challenge High Performance Builder Spotlight Tommy Williams Homes

    SciTech Connect (OSTI)

    2010-02-05

    Builders Challenge fact sheet highlighting performance and energy-efficiency features of Tommy Williams Homes, Longleaf case study, Gainesville, FL

  11. Building America Research Teams: Spotlight on Home Innovation...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    a design methodology for analysis of walls with exterior rigid foam sheathing under wind pressure loading to improve disaster resistance. This research led to a Building ...

  12. Better Buildings: Workforce: Spotlight on Portland, Oregon: Making...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ... contractors to pay their employees Family-Supporting Wages (at least 180% of Oregon ... Having all the players in the room has meant that issues can be worked out more ...

  13. Better Buildings: Workforce: Spotlight on Fayette County, Pennsylvania...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ... weatherization program to households with incomes greater than 200% above poverty level. ... existing efforts of its Pathways Out of Poverty 4 program, which offers introductory ...

  14. Thermal reclamation of used blast grit. Technology spotlight report

    SciTech Connect (OSTI)

    1995-08-01

    Naval shipyards and other domestic port facilities generate thousands of tons of used blast grit annually. There are also thousands of steel bridges in the United States on a repaint schedule that requires grit blasting for surface preparation. All the used grit, along with the paint residue it contains, is currently disposed of in landfills. Cleaning and recycling used blast grit is an attractive alternative. Institute of Gas Technology (IGT) has developed a fluidized-bed sand calciner that is well suited for cleaning and recycling used blast grit. Essentially, IGT researchers applied a transfer/adaptation of fluidized-bed calcination originally developed for the reclamation of foundry sand. The calciner has a patented sloped-grid design that enhances the combustion of paint residues and promotes the isolation of reusable material.

  15. Healthcare Energy: Spotlight on Reheat and Heating | Department...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Estimated Breakdown of Reheat and Heating Energy Use At the MGH Gray Building, from December 2011 through March 2012, cooling was minimal, so the "reheat and heating" energy use ...

  16. Method for deposition of a conductor in integrated circuits

    DOE Patents [OSTI]

    Creighton, J. Randall (Albuquerque, NM); Dominguez, Frank (Albuquerque, NM); Johnson, A. Wayne (Albuquerque, NM); Omstead, Thomas R. (Albuquerque, NM)

    1997-01-01

    A method is described for fabricating integrated semiconductor circuits and, more particularly, for the selective deposition of a conductor onto a substrate employing a chemical vapor deposition process. By way of example, tungsten can be selectively deposited onto a silicon substrate. At the onset of loss of selectivity of deposition of tungsten onto the silicon substrate, the deposition process is interrupted and unwanted tungsten which has deposited on a mask layer with the silicon substrate can be removed employing a halogen etchant. Thereafter, a plurality of deposition/etch back cycles can be carried out to achieve a predetermined thickness of tungsten.

  17. Method for deposition of a conductor in integrated circuits

    DOE Patents [OSTI]

    Creighton, J.R.; Dominguez, F.; Johnson, A.W.; Omstead, T.R.

    1997-09-02

    A method is described for fabricating integrated semiconductor circuits and, more particularly, for the selective deposition of a conductor onto a substrate employing a chemical vapor deposition process. By way of example, tungsten can be selectively deposited onto a silicon substrate. At the onset of loss of selectivity of deposition of tungsten onto the silicon substrate, the deposition process is interrupted and unwanted tungsten which has deposited on a mask layer with the silicon substrate can be removed employing a halogen etchant. Thereafter, a plurality of deposition/etch back cycles can be carried out to achieve a predetermined thickness of tungsten. 2 figs.

  18. Determining thermochemical properties of halogenated metals:...

    Office of Scientific and Technical Information (OSTI)

    Org: USDOE Country of Publication: United States Language: English Subject: 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL...

  19. Incommensurate and commensurate modulations of Ba{sub 5}RTi{sub 3}Nb{sub 7}O{sub 30} (R?=?La, Nd) tungsten bronzes and the ferroelectric domain structures

    SciTech Connect (OSTI)

    Mao, Min Min; Li, Kun; Zhu, Xiao Li; Chen, Xiang Ming

    2015-04-07

    Incommensurate and commensurate structural modulations of Ba{sub 5}RTi{sub 3}Nb{sub 7}O{sub 30} (R?=?La, Nd) tungsten bronze ceramics were investigated by using a cooling holder equipped transmission electron microscopy in the temperature range from 100?K to 363?K. The incommensurate modulation was observed in both Ba{sub 5}LaTi{sub 3}Nb{sub 7}O{sub 30} and Ba{sub 5}NdTi{sub 3}Nb{sub 7}O{sub 30} at room temperature, while there was a transition from incommensurate tilted structure to commensurate superstructure for Ba{sub 5}NdTi{sub 3}Nb{sub 7}O{sub 30} with decreasing temperature. The incommensurate and commensurate modulations were determined by the A-site occupancy of Ba and R cations. The A-site disorder resulted in larger incommensurability parameter ? and the diffusion of the satellite reflection spots. The effect of A-site disorder on the coupling between long-range dipolar order and the commensurate modulation was also discussed. The obvious ferroelectric 180 domains with spike-like shape parallel to c axis were observed for Ba{sub 5}NdTi{sub 3}Nb{sub 7}O{sub 30}, while no macro ferroelectric domain was determined for Ba{sub 5}LaTi{sub 3}Nb{sub 7}O{sub 30}.

  20. Photoluminescence and electrical characterization of unfilled tetragonal tungsten bronze Ba{sub 4}La{sub 1?x}Eu{sub x}TiNb{sub 9}O{sub 30}

    SciTech Connect (OSTI)

    Wei, T.; Wang, Y.Q.; Zhao, C.Z.; Zhan, L.Q.

    2014-12-15

    Graphical abstract: PL spectra of the unfilled TTB structure BLTN: Eu{sup 3+}x samples (x = 0.00, 0.25, 0.50, 0.75, and 1.00) excited by 399 nm. The inset is a schematic diagram of the unfilled TTB structure. - Highlights: Unfilled TTB structure BLTN: Eu{sup 3+}x ceramics have been synthesized. Photoluminescenct properties of the BLTN: Eu{sup 3+}x ceramics have been first reported. Bright red emission excited by NUV light has been observed at room temperature. Obvious variations of dielectric characteristics have been confirmed. Relaxor-like ferroelectric phase transitions have been detected. - Abstract: Unfilled tetragonal tungsten bronze (TTB) structure Ba{sub 4}LaTiNb{sub 9}O{sub 30} doped by Eu{sup 3+} (BLTN: Eu{sup 3+}x) with different x have been prepared, and their structural, photoluminescence, dielectric, and ferroelectric properties are carefully investigated in this work. Bright red emission, originating from {sup 5}D{sub 0} ? {sup 7}F{sub 1} and {sup 5}D{sub 0} ? {sup 7}F{sub 2} transitions of Eu{sup 3+} ions, has been observed by naked eyes at room temperature under near ultraviolet (NUV) light excitation. Optimized emission intensity is obtained when x = 1.00 for present unfilled TTB-type BLTN: Eu{sup 3+}x samples. Furthermore, with increasing x, the dielectric and ferroelectric characteristics of the unfilled TTB-type BLTN: Eu{sup 3+}x samples also display remarkable variation. When x ? 0.50 relaxor-like ferroelectric phase transitions are detected above room temperature, it is believed that unfilled TTB-type BLTN: Eu{sup 3+}x = 1.00 involving bright photoluminescence and enhanced ferroelectric properties may act as a potentially multifunctional optical-electro material.

  1. The first mixed-halide zirconium cluster compounds: Zr{sub 6}Cl{sub 1.6}I{sub 10.4}Be, Zr{sub 6}Cl{sub 1.3}I{sub 10.7}B, and Zr{sub 6}Cl{sub 11.5}I{sub 1.5}B. Matrix effects and halogen substitution in compact network structures

    SciTech Connect (OSTI)

    Koeckerling, M.; Qi, R.Y.; Corbett, J.D.

    1996-03-13

    Investigations of the effect of halogen size on structure stability have been conducted in well-reduced and heavily interbridged zirconium chloride-iodide cluster systems. The title compounds are obtained in good yields from reactions of Zr, ZrCl{sub 4}, ZrI{sub 4}, and B or Be in sealed Ta tubes for {approximately} 4 weeks at 850 {degrees}C. Single-crystal diffraction at room temperature established these as Zr{sub 6}Cl{sub 1.65(4)}I{sub 10.35(4)}Be and Zr{sub 6}Cl{sub 1.27/(3)}. These are derivatives of the Zr{sub 6}I{sub 12}C and orthorhombic Zr{sub 6}Cl{sub 13}B structures, respectively, the latter containing unusual linear chains of clusters interbridged by Cl{sup i-i} that are in turn interconnected by three-bonded Cl{sup a-a-a} atoms. The random substitution of fractional Cl at specific I sites in the first two, and I for certain Cl in the third, was positionally resolved in all cases. The replacement always occurs at two-bonded X{sup i}, so that single types of halogen are left in sites that interconnected clusters and generate the three-dimensional array. Structural changes seen in both structures are specifically related to relief of X{hor_ellipsis}X crowding in the parent structure (matrix effects). Substitution of Cl for I{sup i} in the Zr{sub 6}I{sub 12}C type greatly reduces intercluster I{hor_ellipsis}I repulsions and allows, among other things, a 0.20 {Angstrom} (5.8*5) reduction in Zr-I{sup 1-i} intercluster bond lengths. Increased Cl{hor_ellipsis}I repulsions caused by I substitution in orthorhombic Zr{sub 6}Cl{sub 11.5}I{sub 1.5}B. Phase widths found are 0{le} x {le} 1.4 for Zr{sub 6}Cl{sub x}I{sub 12-x}Z (Z=B, Be) and 0 {le} x {le} 1.5 for Zr{sub 6}Cl{sub 13-x}I{sub x}B. The limit for iodine substitution in the chlorine-rich rhombohedral Zr{sub 6}Cl{sub 12-x}I{sub x}Be is about x=2.5.

  2. Tungsten Mountain Geothermal Area | Open Energy Information

    Open Energy Info (EERE)

    of Replacement Wells: Average Temperature of Geofluid: Sanyal Classification (Wellhead): Reservoir Temp (Geothermometry): Reservoir Temp (Measured): Sanyal Classification...

  3. Exploring hardness enhancement in superhard tungsten tetraboride...

    Office of Scientific and Technical Information (OSTI)

    Authors: Xie, Miao 1 ; Mohammadi, Reza 2 ; Turner, Christopher L. 1 Search SciTech Connect for author "Turner, Christopher L." Search SciTech Connect for ORCID ...

  4. Tungsten Mountain Geothermal Area | Open Energy Information

    Open Energy Info (EERE)

    Well Name: Location: Depth: Initial Flow Rate: "f" is not declared as a valid unit of measurement for this property. The given value was not understood. Flow Test Comment:...

  5. Inert gas rejection device for zinc-halogen battery systems

    DOE Patents [OSTI]

    Hammond, Michael J.; Arendell, Mark W.

    1981-01-01

    An electrolytic cell for separating chlorine gas from other (foreign) gases, having an anode, a cathode assembly, an aqueous electrolyte, a housing, and a constant voltage power supply. The cathode assembly is generally comprised of a dense graphite electrode having a winding channel formed in the face opposing the anode, a gas impermeable (but liquid permeable) membrane sealed into the side of the cathode electrode over the channel, and a packing of graphite particles contained in the channel of the cathode electrode. The housing separates and parallelly aligns the anode and cathode assembly, and provides a hermetic seal for the cell. In operation, a stream of chlorine and foreign gases enters the cell at the beginning of the cathode electrode channel. The chlorine gas is dissolved into the electrolyte and electrochemically reduced into chloride ions. The chloride ions disfuse through the gas impermeable membrane, and are electrochemically oxidized at the anode into purified chlorine gas. The foreign gases do not participate in the above electrochemical reactions, and are vented from the cell at the end of the cathode electrode channel.

  6. Halogenated sulfidohydroboranes for nuclear medicine and boron neutron capture therapy

    DOE Patents [OSTI]

    Miura, Michiko; Slatkin, Daniel N.

    1995-10-03

    A method for performing boron neutron capture therapy for the treatment of tumors is disclosed. The method includes administering to a patient an iodinated sulfidohydroborane, a boron-10-containing compound. The site of the tumor is localized by visualizing the increased concentration of the iodine labelled compound at the tumor. The targeted tumor is then irradiated with a beam of neutrons having an energy distribution effective for neutron capture. Destruction of the tumor occurs due to high LET particle irradiation of the tissue secondary to the incident neutrons being captured by the boron-10 nuclei. Iodinated sulfidohydroboranes are disclosed which are especially suitable for the method of the invention. In a preferred embodiment, a compound having the formula Na.sub.4 B.sub.12 I.sub.11 SSB.sub.12 I.sub.11, or another pharmaceutically acceptable salt of the compound, may be administered to a cancer patient for boron neutron capture therapy.

  7. Halogenated sulfidohydroboranes for nuclear medicine and boron neutron capture therapy

    DOE Patents [OSTI]

    Miura, Michiko; Slatkin, Daniel N.

    1997-03-18

    A method for performing boron neutron capture therapy for the treatment of tumors is disclosed. The method includes administering to a patient an iodinated sulfidohydroborane, a boron-10-containing compound. The site of the tumor is localized by visualizing the increased concentration of the iodine labelled compound at the tumor. The targeted tumor is then irradiated with a beam of neutrons having an energy distribution effective for neutron capture. Destruction of the tumor occurs due to high LET particle irradiation of the tissue secondary to the incident neutrons being captured by the boron-10 nuclei. Iodinated sulfidohydroboranes are disclosed which are especially suitable for the method of the invention. In a preferred embodiment, a compound having the formula Na.sub.4 B.sub.12 I.sub.11 SSB.sub.12 I.sub.11, or another pharmaceutically acceptable salt of the compound, may be administered to a cancer patient for boron neutron capture therapy.

  8. Halogenated sulfidohydroboranes for nuclear medicine and boron neutron capture therapy

    DOE Patents [OSTI]

    Miura, Michiko; Slatkin, Daniel N.

    1997-08-05

    A method for performing boron neutron capture therapy for the treatment of tumors is disclosed. The method includes administering to a patient an iodinated sulfidohydroborane, a boron-10-containing compound. The site of the tumor is localized. by visualizing the increased concentration of the iodine labelled compound at the tumor. The targeted tumor is then irradiated with a beam of neutrons having an energy distribution effective for neutron capture. Destruction of the tumor occurs due to high LET particle irradiation of the tissue secondary to the incident neutrons being captured by the boron-10 nuclei. Iodinated sulfidohydroboranes are disclosed which are especially suitable for the method of the invention. In a preferred embodiment, a compound having the formula Na.sub.4 B.sub.12 I.sub.11 SSB.sub.12 I.sub.11, or another pharmaceutically acceptable salt of the compound, may be administered to a cancer patient for boron neutron capture therapy.

  9. Halogenated sulfidohydroboranes for nuclear medicine and boron neutron capture therapy

    DOE Patents [OSTI]

    Miura, M.; Slatkin, D.N.

    1997-08-05

    A method for performing boron neutron capture therapy for the treatment of tumors is disclosed. The method includes administering to a patient an iodinated sulfidohydroborane, a boron-10-containing compound. The site of the tumor is localized by visualizing the increased concentration of the iodine labelled compound at the tumor. The targeted tumor is then irradiated with a beam of neutrons having an energy distribution effective for neutron capture. Destruction of the tumor occurs due to high LET particle irradiation of the tissue secondary to the incident neutrons being captured by the boron-10 nuclei. Iodinated sulfidohydroboranes are disclosed which are especially suitable for the method of the invention. In a preferred embodiment, a compound having the formula Na{sub 4}B{sub 12}I{sub 11}SSB{sub 12}I{sub 11}, or another pharmaceutically acceptable salt of the compound, may be administered to a cancer patient for boron neutron capture therapy. 1 fig.

  10. Halogenated sulfidohydroboranes for nuclear medicine and boron neutron capture therapy

    DOE Patents [OSTI]

    Miura, M.; Slatkin, D.N.

    1997-03-18

    A method for performing boron neutron capture therapy for the treatment of tumors is disclosed. The method includes administering to a patient an iodinated sulfidohydroborane, a boron-10-containing compound. The site of the tumor is localized by visualizing the increased concentration of the iodine labelled compound at the tumor. The targeted tumor is then irradiated with a beam of neutrons having an energy distribution effective for neutron capture. Destruction of the tumor occurs due to high LET particle irradiation of the tissue secondary to the incident neutrons being captured by the boron-10 nuclei. Iodinated sulfidohydroboranes are disclosed which are especially suitable for the method of the invention. In a preferred embodiment, a compound having the formula Na{sub 4}B{sub 12}I{sub 11}SSB{sub 12}I{sub 11}, or another pharmaceutically acceptable salt of the compound, may be administered to a cancer patient for boron neutron capture therapy. 1 fig.

  11. Halogenated sulfidohydroboranes for nuclear medicine and boron neutron capture therapy

    DOE Patents [OSTI]

    Miura, M.; Slatkin, D.N.

    1995-10-03

    A method for performing boron neutron capture therapy for the treatment of tumors is disclosed. The method includes administering to a patient an iodinated sulfidohydroborane, a boron-10-containing compound. The site of the tumor is localized by visualizing the increased concentration of the iodine labelled compound at the tumor. The targeted tumor is then irradiated with a beam of neutrons having an energy distribution effective for neutron capture. Destruction of the tumor occurs due to high LET particle irradiation of the tissue secondary to the incident neutrons being captured by the boron-10 nuclei. Iodinated sulfidohydroboranes are disclosed which are especially suitable for the method of the invention. In a preferred embodiment, a compound having the formula Na{sub 4}B{sub 12}I{sub 11}SSB{sub 12}I{sub 11}, or another pharmaceutically acceptable salt of the compound, may be administered to a cancer patient for boron neutron capture therapy. 1 fig.

  12. Building America Research Teams: Spotlight on ARIES and NorthernSTAR...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Led by The Levy Partnership (TLP), the ARIES Collaborative consists of more than 50 organizations that are dedicated to developing and commercializing innovative strategies that ...

  13. Moab Uranium Mill Tailings Cleanup Project Steps into Spotlight at International Meeting in Vienna

    Broader source: Energy.gov [DOE]

    VIENNA – The Moab Uranium Mill Tailings Remedial Action (UMTRA) Project has kept the United States at the forefront of characterization, remediation, and end-state reuse of uranium millsites around the world.

  14. Builders Challenge High Performance Builder Spotlight - NextGen Home, Las Vegas, Nevada

    SciTech Connect (OSTI)

    None

    2009-01-01

    Building America Builders Challenge fact sheet on the NextGen demo home built in Las Vegas. The home has a Home Energy Rating System (HERS) index score of 44 with R-40 spray foam attic insulation, R-40 insulated concrete walls, and a 4kW DC solar laminate

  15. Builders Challenge High Performance Builder Spotlight: Yavapai College, Chino Valley, Arizona

    SciTech Connect (OSTI)

    2009-12-22

    Building America Builders Challenge fact sheet on Yavapai College of Chino Valley, Arizona. These college students built a Building America Builders Challenge house that achieved the remarkably low HERS score of -3 and achieved a tight building envelope.

  16. Builders Challenge High Performance Builder Spotlight - Martha Rose Construction, Inc., Seattle, Washington

    SciTech Connect (OSTI)

    2008-01-01

    Building America/Builders Challenge fact sheet on Martha Rose Construction, an energy-efficient home builder in marine climate using the German Passiv Haus design, improved insulation, and solar photovoltaics.

  17. Builders Challenge High Performance Builder Spotlight - Rural Development Inc., Turner Falls, Massachusetts

    SciTech Connect (OSTI)

    2008-01-01

    Building America/Builders Challenge fact sheet on Rural Development Inc, an energy-efficient home builder in cold climate using radiant floor heat, solar hot water, and PV. Examines cost impacts.

  18. Better Buildings: Financing and Incentives: Spotlight on Maine: Transition to a Sustainable Level of Incentives

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    betterbuildings.energy.gov/neighborhoods 1 June 2012 Financing and Incentives Key Takeaways ■■ Maintain a base level of demand in the absence of rebates by providing mul- tiple customer financing options ■■ Create a sense of urgency and drive customer demand with incentive deadlines ■■ Design incentives to achieve specific goals The Better Buildings Neighborhood Program is a U.S. Energy Department program that is improving lives and communities across the country through energy

  19. Better Buildings: Workforce, Spotlight on Maine: Contractor Sales Training Boosts Energy Upgrade Conversions

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    betterbuildings.energy.gov/neighborhoods 1 June 2012 Workforce Key Takeaways ■■ Make sure contractors have the skill sets they need, including sales and interpersonal skills, to help homeowners through the decision-making process ■■ Give contractors tools to learn homeowners' specific needs and determine their motivations when conducting assessments ■■ Support contractors directly or through other organizations to provide ongoing professional development The Better Buildings

  20. Lab Spotlight: Sandia National Lab Team Wins Best in Class Sustainabil...

    National Nuclear Security Administration (NNSA)

    Photo: The team members are Sam McCord, Ralph Wrons, Sean Naegle, Debra Clifford, Ben St. Clair, Lynda Innis, Charles Snider, Chadwick Johnson, Matthew Smith, Jason Loyd, and Gabe ...

  1. Office of Worker Screening and Compensation Support Workers' Spotlight Issue 14 October, November, December 2014

    Energy Savers [EERE]

    Issue 15 October/November/December 2014 Office of Worker Screening and Compensation Support I N S I D E T H I S I S S U E : Director's Note 1 Quilt 1 NDR 2 JOTG Town Hall 2 UI Recognition 3 SERT 4 Calendar 4 A NOTE FROM THE DIRECTOR By Greg Lewis The late summer and early fall have been an extremely busy time for AU-14, filled with a number of events and projects. In August, we attended Joint Outreach Task Group (JOTG) events in Spokane and Richland, WA, as well as an annual meeting of the

  2. Award Spotlight Could Return to EM-Developed Technology for Tracking...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    ... The sensors work in conjunction with the local receiver, secured computer network servers, and satellite- or cellular-based communication channels. The EM RFID technology was ...

  3. Spotlight: Two Los Alamos scientists honored with E.O. Lawrence...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    including the origin of the elements, the nature and evolution of the first stars, the gravitational wave signals from compact binary systems, and the mechanism responsible for...

  4. EECBG Success Story: The City of Los Angeles Has Its Spotlight...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Related Articles Ajani Stewart was close to losing his job as environmental coordinator for the city of Miami before a change to the city's EECBG allowed Stewart to retain his ...

  5. Voluntary Initiative: Designing Incentives Toolkit | Department...

    Office of Environmental Management (EM)

    & Publications Spotlight on Austin, Texas: Let Your Contractor Be Your Guide for Big Rewards Better Buildings Network View | March 2015 Spotlight on Austin, Texas: Best...

  6. LED Surgical Task Lighting Scoping Study: A Hospital Energy Alliance Project

    SciTech Connect (OSTI)

    Tuenge, Jason R.

    2011-01-17

    Tungsten-halogen (halogen) lamps have traditionally been used to light surgical tasks in hospitals, even though they are in many respects ill-suited to the application due to the large percentage of radiant energy outside the visible spectrum and issues with color rendering/quality. Light-emitting diode (LED) technology offers potential for adjustable color and improved color rendition/quality, while simultaneously reducing side-effects from non-visible radiant energy. It also has the potential for significant energy savings, although this is a fairly narrow application in the larger commercial building energy use sector. Based on analysis of available products and Hospital Energy Alliance member interest, it is recommended that a product specification and field measurement procedure be developed for implementation in demonstration projects.

  7. Atomically Thin Heterostructures based on Single-Layer Tungsten...

    Office of Scientific and Technical Information (OSTI)

    Number: AC04-94AL85000 Resource Type: Journal Article Resource Relation: Journal Name: Nano Letters Research Org: Sandia National Laboratories (SNL-NM), Albuquerque, NM (United...

  8. Abnormal thermal conductivity in tetragonal tungsten bronze Ba...

    Office of Scientific and Technical Information (OSTI)

    temperature interval. Substitution of Sr for Ba brings about a significant decrease in thermal conductivity at x???3 accompanied by development of a low-temperature...

  9. Proceedings of the Tungsten Workshop for Hard Target Weapons Program

    SciTech Connect (OSTI)

    Mackiewicz-Ludtka, G.; Hayden, H.W.; Davis, R.M.

    1995-06-01

    The purpose of this meeting was to review and exchange information and provide technical input for improving technologies relevant to the Hard Target Weapons Program. This workshop was attended by representatives from 17 organizations, including 4 Department of Defense (DoD) agencies, 8 industrial companies, and 5 laboratories within DOE. Hard targets are defined as reinforced underground structures that house enemy forces, weapon systems, and support equipment. DOE-ORO and Martin Marietta Energy Systems, Inc. (Energy Systems) have been involved in advanced materials research and development (R&D) for several DOE and DoD programs. These programs are conducted in close collaboration with Eglin AFB, Department of the Army`s Picatinny Arsenal, and other DoD agencies. As part of this ongoing collaboration, Eglin AFB and Oak Ridge National Laboratory planned and conducted this workshop to support the Hard Target Weapons Program. The objectives of this workshop were to (1) review and identify the technology base that exists (primarily due to anti-armor applications) and assess the applicability of this technology to the Hard Target Weapons Program requirements; (2) determine future directions to establish the W materials, processing, and manufacturing technologies suitable for use in fixed, hard target penetrators; and (3) identify and prioritize the potential areas for technical collaboration among the participants.

  10. Microsoft Word - Lamellae tungsten tile design thermal and electromagn...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Stress Profile: von Mises; Screw Assy View 1 Temp Profile (281 C) (275 C) (207 C) (440 C) (440 C) (456 C) (484 C) 31 Fig. 3.2.7 - Thermal Stress Profile: von Mises, Screw...

  11. Solid state consolidation nanocrystalline copper-tungsten using cold spray

    SciTech Connect (OSTI)

    Hall, Aaron Christopher; Sarobol, Pylin; Argibay, Nicolas; Clark, Blythe; Diantonio, Christopher

    2015-09-01

    It is well known that nanostructured metals can exhibit significantly improved properties compared to metals with conventional grain size. Unfortunately, nanocrystalline metals typically are not thermodynamically stable and exhibit rapid grain growth at moderate temperatures. This severely limits their processing and use, making them impractical for most engineering applications. Recent work has shown that a number of thermodynamically stable nanocrystalline metal alloys exist. These alloys have been prepared as powders using severe plastic deformation (e.g. ball milling) processes. Consolidation of these powders without compromise of their nanocrystalline microstructure is a critical step to enabling their use as engineering materials. We demonstrate solid-state consolidation of ball milled copper-tantalum nanocrystalline metal powder using cold spray. Unfortunately, the nanocrystalline copper-tantalum powder that was consolidated did not contain the thermodynamically stable copper-tantalum nanostructure. Nevertheless, this does this demonstrates a pathway to preparation of bulk thermodynamically stable nanocrystalline copper-tantalum. Furthermore, it demonstrates a pathway to additive manufacturing (3D printing) of nanocrystalline copper-tantalum. Additive manufacturing of thermodynamically stable nanocrystalline metals is attractive because it enables maximum flexibility and efficiency in the use of these unique materials.

  12. RADBALLTECHNOLOGY TESTING AND MCNP MODELING OF THE TUNGSTEN COLLIMATOR

    SciTech Connect (OSTI)

    Farfan, E.

    2010-07-08

    The United Kingdom's National Nuclear Laboratory (NNL) has developed a remote, non-electrical, radiation-mapping device known as RadBall{trademark}, which can locate and quantify radioactive hazards within contaminated areas of the nuclear industry. RadBall{trademark} consists of a colander-like outer shell that houses a radiation-sensitive polymer sphere. The outer shell works to collimate radiation sources and those areas of the polymer sphere that are exposed react, becoming increasingly more opaque, in proportion to the absorbed dose. The polymer sphere is imaged in an optical-CT scanner, which produces a high resolution 3D map of optical attenuation coefficients. Subsequent analysis of the optical attenuation matrix provides information on the spatial distribution of sources in a given area forming a 3D characterization of the area of interest. RadBall{trademark} has no power requirements and can be positioned in tight or hard-to reach locations. The RadBall{trademark} technology has been deployed in a number of technology trials in nuclear waste reprocessing plants at Sellafield in the United Kingdom and facilities of the Savannah River National Laboratory (SRNL). This study focuses on the RadBall{trademark} testing and modeling accomplished at SRNL.

  13. Metal oxides of molybdenum of molybdenum or molybdenum and tungsten

    SciTech Connect (OSTI)

    Carcia, P.F.; McCarron, E.M.

    1988-06-28

    A method for preparing a composition of matter comprising ..beta..-Mo/sub 1-chi/W/sub chi/O/sub 3/, wherein 0less than or equal tochi<1.0, comprising spray-drying a solution of molybdic acid or molybdic and tungstic acids in appropriate concentrations and heating the resulting powder at a temperature of from about 275/sup 0/C to about 450/sup 0/C.

  14. Nudged Elastic Band Simulations of Kink Pairs in Tungsten

    SciTech Connect (OSTI)

    Cereceda, D.; Marian, J.

    2015-01-16

    Atomistic techniques have been used to calculate energy barriers for dislocation motion that control the strength (yield stress and flow stress) of the material. In particular, the calculations focus on the change in enthalpy as a straight dislocation moves through the crystal lattice (the Peierls barrier) and kink pair formation enthalpy that controls the thermally activated double-kink mechanism important at low to moderate stresses. A novel means of assessing kink widths within atomistic simulations is introduced.

  15. Collisional-Radiative Modeling of Tungsten at Temperatures of...

    Office of Scientific and Technical Information (OSTI)

    ... Model A. This sensitivity study led us to tentatively ... nm and 6.2 nm are in qualitative agreement with the ... We do not attempt a more quantitative comparison because the ...

  16. Thermal Gradient Holes At Tungsten Mountain Area (Shevenell,...

    Open Energy Info (EERE)

    Holes Activity Date Usefulness useful DOE-funding Unknown Notes Collaboration with the gold mining industry has brought two new geothermal discoveries to the attention of the...

  17. Thermal Gradient Holes At Tungsten Mountain Area (Kratt, Et Al...

    Open Energy Info (EERE)

    Gradient Holes Activity Date Usefulness useful DOE-funding Unknown Notes twenty-three gold exploration holes were drilled by Newcrest Resources, Inc. during 2005 and 2006 along...

  18. Scientists gain insight into origin of tungsten ditelluride's...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Jared Sagoff at (630) 252-5549 or media@anl.gov. Connect Find an Argonne expert by subject. Follow Argonne on Twitter, Facebook, Google+ and LinkedIn. For inquiries on...

  19. Topical Report Tantalum 2.5% Tungsten Machinability Testing

    SciTech Connect (OSTI)

    L. J. Lazarus

    2009-09-02

    Protection Association (NFPA). NFPA 484, Standard for Combustible Metals, Chapter 9 Tantalum and Annex E, supplemental Information on Tantalum require cutting oil be used when machining tantalum because it burns at such a high temperature that it breaks down the water in a water-based metalworking fluid (MWF). The NFPA guide devotes approximately 20 pages to this material. The Kansas City Plant (KCP) uses Fuchs Lubricants Ecocut Base 44 LVC as a MWF. This is a highly chlorinated oil with a high flash point (above 200 F). The chlorine is very helpful in preventing BUE (Built Up Edge) that occurs frequently with this very gummy material. The Ecocut is really a MWF additive that Fuchs uses to add chlorinated fats to other non-chlorinated MWF.

  20. Deuterium Retention in Tungsten-Coated Reduced ActivationFerritic...

    Office of Environmental Management (EM)

    in Safety and Tritium Applied Research (STAR) facility, Idaho National Laboratory Overview of tritium activity in Japan Tritium Plasma Experiment and Its Role in PHENIX Program...

  1. NUCLEOSYNTHETIC TUNGSTEN ISOTOPE ANOMALIES IN ACID LEACHATES OF THE MURCHISON CHONDRITE: IMPLICATIONS FOR HAFNIUM-TUNGSTEN CHRONOMETRY

    SciTech Connect (OSTI)

    Burkhardt, Christoph; Wieler, Rainer; Kleine, Thorsten; Dauphas, Nicolas

    2012-07-01

    Progressive dissolution of the Murchison carbonaceous chondrite with acids of increasing strengths reveals large internal W isotope variations that reflect a heterogeneous distribution of s- and r-process W isotopes among the components of primitive chondrites. At least two distinct carriers of nucleosynthetic W isotope anomalies must be present, which were produced in different nucleosynthetic environments. The co-variation of {sup 182}W/{sup 184}W and {sup 183}W/{sup 184}W in the leachates follows a linear trend that is consistent with a mixing line between terrestrial W and a presumed s-process-enriched component. The composition of the s-enriched component agrees reasonably well with that predicted by the stellar model of s-process nucleosynthesis. The co-variation of {sup 182}W/{sup 184}W and {sup 183}W/{sup 184}W in the leachates provides a means for correcting the measured {sup 182}W/{sup 184}W and {sup 182}W/{sup 183}W of Ca-Al-rich inclusions (CAI) for nucleosynthetic anomalies using the isotopic variations in {sup 183}W/{sup 184}W. This new correction procedure is different from that used previously, and results in a downward shift of the initial {epsilon}{sup 182}W of CAI to -3.51 {+-} 0.10 (where {epsilon}{sup 182}W is the variation in 0.01% of the {sup 182}W/{sup 183}W ratio relative to Earth's mantle). This revision leads to Hf-W model ages of core formation in iron meteorite parent bodies that are {approx}2 Myr younger than previously calculated. The revised Hf-W model ages are consistent with CAI being the oldest solids formed in the solar system, and indicate that core formation in some planetesimals occurred within {approx}2 Myr of the beginning of the solar system.

  2. Alaska Energy Champion: Craig Moore

    Broader source: Energy.gov [DOE]

    The Alaska Energy Champions is a regular feature spotlighting pioneers of Alaska's new energy frontier.

  3. Treatment and prevention systems for acid mine drainage and halogenated contaminants

    DOE Patents [OSTI]

    Jin, Song (Fort Collins, CO); Fallgren, Paul H. (Laramie, WY); Morris, Jeffrey M. (Laramie, WY)

    2012-01-31

    Embodiments include treatments for acid mine drainage generation sources (10 perhaps by injection of at least one substrate (11) and biologically constructing a protective biofilm (13) on acid mine drainage generation source materials (14). Further embodiments include treatments for degradation of contaminated water environments (17) with substrates such as returned milk and the like.

  4. Processes for preparing carbon fibers using sulfur trioxide in a halogenated solvent

    DOE Patents [OSTI]

    Patton, Jasson T.; Barton, Bryan E.; Bernius, Mark T.; Chen, Xiaoyun; Hukkanen, Eric J.; Rhoton, Christina A.; Lysenko, Zenon

    2015-12-29

    Disclosed here are processes for preparing carbonized polymers (preferably carbon fibers), comprising sulfonating a polymer with a sulfonating agent that comprises SO.sub.3 dissolved in a solvent to form a sulfonated polymer; treating the sulfonated polymer with a heated solvent, wherein the temperature of the solvent is at least 95.degree. C.; and carbonizing the resulting product by heating it to a temperature of 500-3000.degree. C. Carbon fibers made according to these methods are also disclosed herein.

  5. Activation of water soluble amines by halogens for trapping methyl radioactive iodine from air streams

    DOE Patents [OSTI]

    Deitz, Victor R.; Blachly, Charles H.

    1977-01-01

    Gas adsorbent charcoals impregnated with an aqueous solution of the reaction product of a tertiary amine and elemental iodine or bromine are better than 99 per cent efficient in trapping methyl iodine.sup.131. The chemical addition of iodine or bromine to the tertiary amine molecule increases the efficiency of the impregnated charcoal as a trapping agent, and in conjunction with the high flash point of the tertiary amine raises the ignition temperature of the impregnated charcoal.

  6. Method of dehalogenation using diamonds

    DOE Patents [OSTI]

    Farcasiu, Malvina (Roslyn Harbor, NY); Kaufman, Phillip B. (Lafayette, LA); Ladner, Edward P. (Pittsburgh, PA); Anderson, Richard R. (Brownsville, PA)

    2000-01-01

    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.

  7. Speaker biographies for the Fuel Cell Technologies Program Webinar titled Hydrogen Production by PEM Electrolysis … Spotlight on Giner and Proton

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Professional Bios - Kathy Ayers and Monjid Hamdan Kathy Ayers, Director of Research, Proton Energy Systems Kathy Ayers is the Director of Research at Proton Energy Systems. She is responsible for developing the long term research direction for improvements in performance, reliability, and cost of Proton's electrolyzer cell stack as well as overseeing Proton's military and aerospace programs. She has served as Principal Investigator on multiple contract research projects from the U.S. Department

  8. Hydrogen Production by Polymer Electrolyte Membrane (PEM)

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Electrolysis-Spotlight on Giner and Proton | Department of Energy by Polymer Electrolyte Membrane (PEM) Electrolysis-Spotlight on Giner and Proton Hydrogen Production by Polymer Electrolyte Membrane (PEM) Electrolysis-Spotlight on Giner and Proton Presentation slides and speaker biographies from the DOE Fuel Cell Technologies Office webinar "Hydrogen Production by Polymer Electrolyte Membrane (PEM) Electrolysis-Spotlight on Giner and Proton" held on May 23, 2011. PDF icon Water

  9. Resonance Raman and far-infrared studies of isotopically disordered and mixed-halide halogen-bridged platinum chain solids

    SciTech Connect (OSTI)

    Love, S.P.; Worl, L.A.; Donohoe, R.J.; Huckett, S.C.; Saxena, A.; Huang, X.Z.; Bishop, A.R.; Swanson, B.I.

    1992-12-31

    The MX chain solids [Pt(en){sub 2}][Pt(en){sub 2}X{sub 2}](CIO{sub 4}){sub 4}, (en = C{sub 2}H{sub 8}N{sub 2} and X=Cl, Br), referred to as ``PtX,`` are used to explore some of the surprising spectral consequences of disorder in 1-D systems, first for pure PtCl, where the disorder arises from randomly distributed Cl isotopes, then for the more drastic case of the mixed-halide materials PtCl{sub 1minusx}Br{sub x}. Lattice dynamics and Peierls-Hubbard modelling are used to analyze the observed spectral behavior. In both cases, the complex structure seen in the Raman and IR spectra is found to arise from strongly localized vibrational modes residing on chain segments, defined by sequences of Cl isotopes for PtCl, and by sequences of Cl and Br for PtCl{sub 1minusx}Br{sub x}. 4 figs, 8 refs.

  10. Gas Phase Reactions between Fuel Molecules and Halogens: A Review of the Reaction between Atomic Chlorine and Ammonia

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Steven Ewa Xuefei Tao Jingjing Alecu Mielke Papajak Xu Yu Zheng Annual Report Combustion Energy Frontier Research Center Princeton, NJ Sept. 23, 2010 Truhlar group University of Minnesota Practical methods for including torsional anharmonicity in thermochemical calculations on complex molecules * We proposed a new approximation called the multi-structural method with torsional anharmonicity (MS-T) to calculate conformational-vibrational-rotational partition functions. * It is applicable for

  11. OSTI, US Dept of Energy, Office of Scientific and Technical Information |

    Office of Scientific and Technical Information (OSTI)

    Speeding access to science information from DOE and Beyond spotlight Topic Cool Connections by Kathy Chambers 24 May, 2012 in Products and Content .EDUconnections The coolest people are found on OSTI's .EDUconnections Spotlights. Penn State's Dr. Prabhu and Dr. Paulsonresearch different fields but discovered a possible cure for leukemia over a pizza faculty lunch. Related Topics: .EDUconnections, research, science programs, spotlight

  12. Infrared floodlight assembly

    DOE Patents [OSTI]

    Wierzbicki, Julian J. (Peabody, MA); Chakrabarti, Kirti B. (Danvers, MA)

    1987-09-22

    An infrared floodlight assembly (10) including a cast aluminum outer housing (11) defining a central chamber (15) therein. A floodlight (14), having a tungsten halogen lamp as the light source, is spacedly positioned within a heat conducting member (43) within chamber (15) such that the floodlight is securedly positioned in an aligned manner relative to the assembly's filter (35) and lens (12) components. The invention also includes venting means (51) to allow air passage between the interior of the member (43) and the adjacent chamber (15), as well as engagement means (85) for engaging a rear surface of the floodlight (14) to retain it firmly against an internal flange of the member (43). A reflector (61), capable of being compressed to allow insertion or removal, is located within the heat conducting member's interior between the floodlight (14) and filter (35) to reflect infrared radiation toward the filter (35) and spaced lens (12).

  13. Infrared floodlight

    DOE Patents [OSTI]

    Levin, Robert E. (S. Hamilton, MA); English, George J. (Reading, MA)

    1986-08-05

    An infrared floodlight assembly designed particularly for security purposes and including a heat-conducting housing, a lens secured to the housing to provide a closure therefor, and a floodlight located within (and surrounded by) the housing. The floodlight combines the use of a tungsten halogen light source and dichroic hot and cold mirrors for directing substantially only infrared radiation toward the assembly's forward lens. Visible radiation is absorbed by the housing's interior wall(s) and, optionally, by a filter located between the floodlight and lens. An optional means may be used within the floodlight to reflect all forward radiation back toward the paraboloidal hot mirror or, alternatively, to reflect only visible radiation in this direction. The dichroic hot and cold mirrors preferably each comprise a glass substrate having multiple layers of titanium dioxide and silicon dioxide thereon.

  14. Uncertainty Analysis of Spectral Irradiance Reference Standards Used for NREL Calibrations

    SciTech Connect (OSTI)

    Habte, A.; Andreas, A.; Reda, I.; Campanelli, M.; Stoffel, T.

    2013-05-01

    Spectral irradiance produced by lamp standards such as the National Institute of Standards and Technology (NIST) FEL-type tungsten halogen lamps are used to calibrate spectroradiometers at the National Renewable Energy Laboratory. Spectroradiometers are often used to characterize spectral irradiance of solar simulators, which in turn are used to characterize photovoltaic device performance, e.g., power output and spectral response. Therefore, quantifying the calibration uncertainty of spectroradiometers is critical to understanding photovoltaic system performance. In this study, we attempted to reproduce the NIST-reported input variables, including the calibration uncertainty in spectral irradiance for a standard NIST lamp, and quantify uncertainty for measurement setup at the Optical Metrology Laboratory at the National Renewable Energy Laboratory.

  15. Tungsten polyoxometalate molecules as active nodes for dynamic carrier exchange in hybrid molecular/semiconductor capacitors

    SciTech Connect (OSTI)

    Balliou, A.; Douvas, A. M.; Normand, P.; Argitis, P.; Glezos, N.; Tsikritzis, D.; Kennou, S.

    2014-10-14

    In this work we study the utilization of molecular transition metal oxides known as polyoxometalates (POMs), in particular the Keggin structure anions of the formula PW₁₂O₄₀³⁻, as active nodes for potential switching and/or fast writing memory applications. The active molecules are being integrated in hybrid Metal-Insulator/POM molecules-Semiconductor capacitors, which serve as prototypes allowing investigation of critical performance characteristics towards the design of more sophisticated devices. The charging ability as well as the electronic structure of the molecular layer is probed by means of electrical characterization, namely, capacitance-voltage and current-voltage measurements, as well as transient capacitance measurements, C (t), under step voltage polarization. It is argued that the transient current peaks observed are manifestations of dynamic carrier exchange between the gate electrode and specific molecular levels, while the transient C (t) curves under conditions of molecular charging can supply information for the rate of change of the charge that is being trapped and de-trapped within the molecular layer. Structural characterization via surface and cross sectional scanning electron microscopy as well as atomic force microscopy, spectroscopic ellipsometry, UV and Fourier-transform IR spectroscopies, UPS, and XPS contribute to the extraction of accurate electronic structure characteristics and open the path for the design of new devices with on-demand tuning of their interfacial properties via the controlled preparation of the POM layer.

  16. Deuterium Retention in Tungsten-Coated Reduced Activation Ferritic/Martensitic Steel

    Broader source: Energy.gov [DOE]

    Presentation from the 34th Tritium Focus Group Meeting held in Idaho Falls, Idaho on September 23-25, 2014.

  17. Tungsten-188/carrier-free rhenium-188 perrhenic acid generator system

    DOE Patents [OSTI]

    Knapp, F.F. Jr.; Lisic, E.C.; Mirzadeh, S.; Callahan, A.P.

    1994-01-04

    A generator system has been invented for providing a carrier-free radioisotope in the form of an acid comprises a chromatography column in tandem fluid connection with an ion exchange column, the chromatography column containing a charge of a radioactive parent isotope. The chromatography column, charged with a parent isotope, is eluted with an alkali metal salt solution to generate the radioisotope in the form of an intermediate solution, which is passed through the ion-exchange column to convert the radioisotope to a carrier-free acid form. 1 figure.

  18. Method of fabricating thin-walled articles of tungsten-nickel-iron alloy

    DOE Patents [OSTI]

    Hovis, Jr., Victor M. (Kingston, TN); Northcutt, Jr., Walter G. (Oak Ridge, TN)

    1982-01-01

    The present invention relates to a method for fabricating thin-walled high-density structures oftungsten-nickel-iron alloys. A powdered blend of the selected alloy constituents is plasma sprayed onto a mandrel having the desired article configuration. The sprayed deposit is removed from the mandrel and subjected to liquid phase sintering to provide the alloyed structure. The formation of the thin-walled structure by plasma spraying significantly reduces shrinkage, and cracking while increasing physical properties of the structure over that obtainable by employing previously known powder metallurgical procedures.

  19. Tungsten impurity transport experiments in Alcator C-Mod to address...

    Office of Scientific and Technical Information (OSTI)

    States) Technische Universitt Wien, Atominstitut, Stadionallee 2, 1020 Vienna (Austria) Max-Planck-Institut fr Plasmaphysik, Boltzmanstrae 2, D-85748 Garching (Germany) ...

  20. Structure and Bonding of Tungsten Oxide Clusters on Nanostructured Cu-O Surfaces

    SciTech Connect (OSTI)

    Wagner, Margareta; Surnev, Svetlozar; Ramsey, Michael; Barcaro, Giovanni; Sementa, Luca; Negreiros, Fabio R.; Fortunelli, Alessandro; Dohnalek, Zdenek; Netzer, Falko P.

    2011-12-01

    (WO3)3 gas-phase clusters generated via vacuum sublimation are deposited under UHV and low temperature (5 K) conditions on a Cu(110) 'stripe' phase consisting of alternating Cu-O (2x1) and clean Cu regions. STM imaging shows that the clusters adsorb as intact units on both substrates, and the suggested adsorption geometries are confirmed by density-functional (DF) simulations. On the clean surface the overall distortion is minor and we are able to image the nodal structure of an individual molecular orbital in the STM at low bias, whereas on the Cu-O surface both the clusters and the substrate are significantly distorted, due to the strong oxygen affinity of W atoms. On both surfaces cluster and Cu electronic states are appreciably mixed, and electron charge is donated by the surface to the cluster. The experimentally STS-determined DOS signature of the adsorption complex consists in two peaks across the Fermi energy and is well reproduced by the DF calculations.

  1. Tungsten-188/carrier-free rhenium-188 perrhenic acid generator system

    DOE Patents [OSTI]

    Knapp, F.F. Jr.; Lisic, E.C.; Mirzadeh, S.; Callahan, A.P.

    1993-02-16

    A generator system for providing a carrier-free radioisotope in the form of an acid comprises a chromatography column in tandem fluid connection with an ion exchange column, the chromatography column containing a charge of a radioactive parent isotope. The chromatography column, charged with a parent isotope, is eluted with an alkali metal salt solution to generate the radioisotope in the form of an intermediate solution, which is passed through the ion-exchange column to convert the radioisotope to a carrier-free acid form.

  2. 2-M Probe At Tungsten Mountain Area (Kratt, Et Al., 2008) | Open...

    Open Energy Info (EERE)

    Mark Coolbaugh, Chris Sladek, Rick Zehner, Robin Penfield, Ben Delwiche (2008) A New Gold Pan For The West- Discovering Blind Geothermal Systems With Shallow Temperature Surveys...

  3. Tungsten-188/carrier-free rhenium-188 perrhenic acid generator system

    DOE Patents [OSTI]

    Knapp, Jr., Furn F. (Oak Ridge, TN); Lisic, Edward C. (Cookeville, TN); Mirzadeh, Saed (Knoxville, TN); Callahan, Alvin P. (Harriman, TN)

    1993-01-01

    A generator system for providing a carrier-free radioisotope in the form of an acid comprises a chromatography column in tandem fluid connection with an ion exchange column, the chromatography column containing a charge of a radioactive parent isotope. The chromatography column, charged with a parent isotope, is eluted with an alkali metal salt solution to generate the radioisotope in the form of an intermediate solution, which is passed through the ion-exchange column to convert the radioisotope to a carrier-free acid form.

  4. Tungsten-188/carrier-free rhenium-188 perrhenic acid generator system

    DOE Patents [OSTI]

    Knapp, Jr., Furn F. (Oak Ridge, TN); Lisic, Edward C. (Cookeville, TN); Mirzadeh, Saed (Knoxville, TN); Callahan, Alvin P. (Harriman, TN)

    1994-01-01

    A generator system for providing a carrier-free radioisotope in the form of an acid comprises a chromatography column in tandem fluid connection with an ion exchange column, the chromatography column containing a charge of a radioactive parent isotope. The chromatography column, charged with a parent isotope, is eluted with an alkali metal salt solution to generate the radioisotope in the form of an intermediate solution, which is passed through the ion-exchange column to convert the radioisotope to a carrier-free acid form.

  5. Literature on fabrication of tungsten for application in pyrochemical processing of spent nuclear fuels

    SciTech Connect (OSTI)

    Edstrom, C.M.; Phillips, A.G.; Johnson, L.D.; Corle, R.R.

    1980-10-11

    The pyrochemical processing of nuclear fuels requires crucibles, stirrers, and transfer tubing that will withstand the temperature and the chemical attack from molten salts and metals used in the process. This report summarizes the literature that pertains to fabrication (joining, chemical vapor deposition, plasma spraying, forming, and spinning) is the main theme. This report also summarizes a sampling of literature on molbdenum and the work previously performed at Argonne National Laboratory on other container materials used for pyrochemical processing of spent nuclear fuels.

  6. Recyclable catalysts methods of making and using the same

    DOE Patents [OSTI]

    Dioumaev, Vladimir K.; Bullock, R. Morris

    2006-02-28

    Organometallic complexes are provided, which include a catalyst containing a transition metal, a ligand and a component having the formula GAr.sup.F. Ar.sup.F is an aromatic ring system selected from phenyl, naphthalenyl, anthracenyl, fluorenyl, or indenyl. The aromatic ring system has at least a substituent selected from fluorine, hydrogen, hydrocarbyl or fluorinated hydrocarbyl, G is substituted or unsubstituted (CH.sub.2).sub.n or (CF.sub.2).sub.n, wherein n is from 1 to 30, wherein further one or more CH.sub.2 or CF.sub.2 groups are optionally replaced by NR, PR, SiR.sub.2, BR, O or S, or R is hydrocarbyl or substituted hydrocarbyl, GAr.sup.F being covalently bonded to either said transition metal or said ligand of said catalyst, thereby rendering said cationic organometallic complex liquid. The catalyst of the organometallic complex can be [CpM(CO).sub.2(NHC)L.sub.k].sup.+A.sup.-, wherein M is an atom of molybdenum or tungsten, Cp is substituted or unsubstituted cyclopentadienyl radical represented by the formula [C.sub.5Q.sup.1Q.sup.2Q.sup.3Q.sup.4Q.sup.5], wherein Q.sup.1 to Q.sup.5 are independently selected from the group consisting of H radical, GAr.sup.F C.sub.1-20 hydrocarbyl radical, substituted hydrocarbyl radical, substituted hydrocarbyl radical substituted by GAr.sup.F, halogen radical, halogen-substituted hydrocarbyl radical, --OR, --C(O)R', --CO.sub.2R', --SiR'.sub.3 and --NR'R'', wherein R' and R'' are independently selected from the group consisting of H radical, C.sub.1-20 hydrocarbyl radical, halogen radical, and halogen-substituted hydrocarbyl radical, wherein said Q.sup.1 to Q.sup.5 radicals are optionally linked to each other to form a stable bridging group, NHC is any N-heterocyclic carbene ligand, L is either any neutral electron donor ligand, wherein k is a number from 0 to 1 or L is an anionic ligand wherein k is 2, and A.sup.- is an anion. Processes using the organometallic complexes as catalysts in catalytic reactions, such as for example, the hydrosilylation of aldehydes, ketones and esters are also provided.

  7. Monthly News Blast: February 2013

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    YouTube  Facebook  Twitter Blog Past Newsletters Bioenergy Social Media & Multimedia Corner Monthly News Blast February 2013 In the Spotlight: Zia Haq Zia Haq, Lead Analyst and DPA Coordinator, is in the spotlight this month as part of our video series featuring Bioenergy Technologies Office staff. Watch Episode 4 of the Office's Staff Spotlight Series to hear about Zia's vision for the Office and why he first became interested in the bioenergy field. Did you miss the first three

  8. Trends in Contractor Conversion Rates | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Better Buildings -- Concierge Programs for Contractors -- They're Not Just for Consumers anymore Programs and Contractors -Top Tips for Successful Relationships (101) Spotlight on ...

  9. SSQ V3 N3_Final_4oct13.indd

    National Nuclear Security Administration (NNSA)

    Administrator for Research, Development, Test Capabilities, and Evaluation, Roger A. ... Awards 6 Spotlight on the Offi ce of Test Capabilities and Evaluation 8 Five ...

  10. Hydrogen Production by Polymer Electrolyte Membrane (PEM)Electrolysis...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Presentation slides and speaker biographies from the DOE Fuel Cell Technologies Office webinar "Hydrogen Production by Polymer Electrolyte Membrane (PEM) Electrolysis-Spotlight on ...

  11. Homeowner and Contractor Surveys | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Making the Program Work for Contractors Better Buildings - Spotlight on Portland, Oregon; Financing and Incetntives: Use Incentives to Get Attention and Encourage Deep Savings

  12. Approaches to Approved Contractor Lists | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Making the Program Work for Contractors Better Buildings - Spotlight on Portland, Oregon; Financing and Incetntives: Use Incentives to Get Attention and Encourage Deep Savings

  13. Building America Update - March 6, 2014 | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Top Innovation Spotlight: Window Replacement, Rehabilitation, and Repair Guides Photo of a man hanging a storm window onto an existing window of a house. Researchers at Building ...

  14. AlumniLink: January 2015

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Software speeds detection of diseases and cancer-treatment targets Alumni spotlight Ni Ni: University of California - Los Angeles Francesco Grilli: Karlsruhe Institute of...

  15. OSTI, US Dept of Energy, Office of Scientific and Technical Informatio...

    Office of Scientific and Technical Information (OSTI)

    hearing, Leslie Groves, Manhattan Project, OpenNet, Oppenheimer, security Read more... ... collections. This quarter the spotlight is on the Human Radiation Experiments collection. ...

  16. DOE SSL Postings: March 3, 2015, issue

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    white paper "Prospects for U.S.-Based Manufacturing in the SSL Industry." Spotlight on Sky Factory Sky Factory manufactures backlit artificial skylights and windows that feature...

  17. TransForum - Volume 10, No. 2 - Summer 2010

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    for Projects to Improve Fuel Efficiency 6 Argonne's Integrated Approach to Developing Biofuels and Engines 9 Facility Spotlight: MATT 10 Modeling PHEV Thermal Effects on Engine...

  18. Webinar: Hydrogen Production by Polymer Electrolyte Membrane...

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    Production by Polymer Electrolyte Membrane (PEM) Electrolysis-Spotlight on Giner and Proton Webinar: Hydrogen Production by Polymer Electrolyte Membrane (PEM) Electrolysis-Spotligh...

  19. Friends of Berkeley Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Map Contact Member Spotlight sp3 Nanocarriers May Carry New Hope for Brain Cancer Therapy Berkeley Lab researchers have developed a new family of nanocarriers, called...

  20. Women Who Inspire

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Women Who Inspire Students Who Inspire Postdocs Who Inspire Employee Spotlight Crystal J. Rodarte-Romero Crystal J. Rodarte-Romero-Engineering safer structures Los Alamos bridge...

  1. Light-Material Interactions in Energy Conversion - Energy Frontier...

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    and innovators in the design and fabrication of novel electronic and photonic materials. Spotlight lmi team New frontiers in 3D Printing: Jennifer Lewis' group at Harvard has...

  2. 2009 Feature Stories | NREL

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    ... And now alumni from NREL's Executive Energy Leadership program (Energy Execs) are finding their green energy projects in the national spotlight as they put what they learned into ...

  3. Batteries and Energy Storage | Argonne National Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    SPOTLIGHT Batteries and Energy Storage Argonne's all- encompassing battery research program spans the continuum from basic materials research and diagnostics to scale-up processes ...

  4. October 2015

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    What's Lacking with Fracking More low-emission natural gas with less environmental risk. Spotlights Positive Vibes Focused sound waves for deep-brain stimulation therapy Digging ...

  5. DOE Connects with Higher Education Community

    Broader source: Energy.gov [DOE]

    EDUconnections is a year old project, and through it we celebrate our university partners, spotlighting a different higher education institution every month.

  6. Field test of a generic method for halogenated hydrocarbons: Semivost test at a chemical manufacturing facility. Final project report, August 1992-August 1993

    SciTech Connect (OSTI)

    McGaughey, J.F.; Bursey, J.T.; Merrill, R.G.

    1996-11-01

    The candidate methods for semivolatile organic compounds are SW-846 Sampling Method 0010 and Analytical Method 8270, which are applicable to stationary sources. Two field tests were conducted using quadruple sampling trains with dynamic spiking were performed according to the guidelines of EPA Method 301. The first field test was performed at a site with low levels of moisture. The second test reported here was conducted at a chemical manufacturing facility where chemical wastes were burned in a coal-fired boiler. Poor recoveries obtained for the spiked analytes at the second test were attributed to wet sorbent from the sampling train, use of methanol to effect complete transfer of wet sorbent from the sampling module, and use of extraction techniques which did not effect a complete separation of methylene chloride from methanol. A procedure to address problems with preparation of samples from Method 0010 is included in the report.

  7. EDDY RESOLVING NUTRIENT ECODYNAMICS IN THE GLOBAL PARALLEL OCEAN PROGRAM AND CONNECTIONS WITH TRACE GASES IN THE SULFUR, HALOGEN AND NMHC CYCLES

    SciTech Connect (OSTI)

    S. CHU; S. ELLIOTT

    2000-08-01

    Ecodynamics and the sea-air transfer of climate relevant trace gases are intimately coupled in the oceanic mixed layer. Ventilation of species such as dimethyl sulfide and methyl bromide constitutes a key linkage within the earth system. We are creating a research tool for the study of marine trace gas distributions by implementing coupled ecology-gas chemistry in the high resolution Parallel Ocean Program (POP). The fundamental circulation model is eddy resolving, with cell sizes averaging 0.15 degree (lat/long). Here we describe ecochemistry integration. Density dependent mortality and iron geochemistry have enhanced agreement with chlorophyll measurements. Indications are that dimethyl sulfide production rates must be adjusted for latitude dependence to match recent compilations. This may reflect the need for phytoplankton to conserve nitrogen by favoring sulfurous osmolytes. Global simulations are also available for carbonyl sulfide, the methyl halides and for nonmethane hydrocarbons. We discuss future applications including interaction with atmospheric chemistry models, high resolution biogeochemical snapshots and the study of open ocean fertilization.

  8. X-ray backlighting density measurements of tungsten and aluminum wire and wire array z-pinches

    SciTech Connect (OSTI)

    Hammer, D.A.; Pikuz, S.A.; Shelkovenko, T.A.; Greenly, J.B.; Sinars, D.B.; Mingaleev, A.R.

    1999-07-01

    Calibrated density measurements in both the coronal plasmas and dense cores of exploding W wire and wire array Z-pinches, powered by the {approximately}450 kA, 100 ns XP-pulser at Cornell University, have been made using two-frame x-ray backlighting in conjunction with known thickness W step wedges. The backlighting images are made by Mo wire X-pinch radiation filtered by 12.5 {micro}m Ti impinging upon a sandwich of films (Micrat VR, Kodak GWL, Kodak DEF) which have different sensitivities to increase the dynamic range of the method. A W step wedge filter is placed in front of the films, giving absolute line density calibration of each exposure with estimated errors ranging from 20 to 50%. Assuming x-ray absorption by the W plasma is the same as for the solid material, the authors are able to measure W areal densities from 3.2 x 10{sup 19} to 2 x 10{sup 17}/cm{sup 2}. These can be converted to number density assuming azimuthal symmetry. For example, for an exploded 7.5 {micro}m wire with a 15--20 {micro}m diameter dense core and a 1 mm corona diameter, the implied W volume density ranges from 2x10{sup 18} to over 10{sup 22}/cm{sup 3}. Integration of the line density gives an estimate of the fraction of the wire mass in the corona and core. For example, with 100 kA peak current in a single 7.5 {micro}m W wire, {approximately}70% (>90%) of the W mass is in the corona after 53 ns (61 ns). The authors also observe that the corona has large, roughly axisymmetric axial nonuniformity both in radius and in mass density. In addition, the coronal plasma contains more of the W mass, expands faster and is more uniform when the wire is surface-cleaned by preheating. In arrays of 2--8 wires with the same 100 kA total current, detectable coronal plasma appears after 25--35 ns, and much of it is swept toward the center of the array, forming a dense channel. The portion of the initial wire mass in the coronal plasma increases with smaller wire diameter and decreases with greater wire number: 15% for 4 x 13.5 {micro}m, 35% for 4 x 7.5 {micro}m, and 25% for 8 x 7.5 {micro}m, at 46--48 ns (unheated). Similar measurements are now being made with Al wires and an Al step wedge. Results will be presented.

  9. Solar photocatalytic activities of porous Nb-doped TiO{sub 2} microspheres by coupling with tungsten oxide

    SciTech Connect (OSTI)

    Kou, Yanqiang; Yang, Jikai; Li, Bing; Fu, Shencheng

    2015-03-15

    Highlights: Nb-TiO{sub 2}/WO{sub 3} was prepared by USP method combined impregnation method. Nb-doping extend the spectral absorption of TiO{sub 2} into visible spectrum. Nb-TiO{sub 2}/WO{sub 3} has a similar optical band gap as Nb-TiO{sub 2}. PL spectra indicate WO{sub 3} can accept the photoexcited electrons from Nb-TiO{sub 2}. Nb-TiO{sub 2}/WO{sub 3} shows higher activity than TiO{sub 2} and Nb-TiO{sub 2} under solar light. - Abstract: Nb doped TiO{sub 2} microspheres modified with WO{sub 3} (Nb-TiO{sub 2}/WO{sub 3}) was prepared by ultrasonic spray pyrolysis method combined with impregnation method. The microspheres were characterized with SEM, TEM, XRD, BET, photoluminescence and UVvis absorption spectra. The Nb-doping was observed to extend the spectral absorption of TiO{sub 2} into visible spectrum, and the absorption onset was red-shifted for about 88 nm compared to pristine TiO{sub 2} microspheres. Nb-TiO{sub 2}/WO{sub 3} microspheres do not display a red-shifted absorption edge compared with Nb doped TiO{sub 2} microspheres. Under solar irradiation, Nb-TiO{sub 2}/WO{sub 3} microspheres showed higher photocatalytic activity for methylene blue degradation compared with that of pure TiO{sub 2} microspheres and Nb doped TiO{sub 2} microspheres, which could be ascribed to the extended light absorption range and the suppression of electron-hole pair recombination.

  10. OSTI, US Dept of Energy, Office of Scientific and Technical Information |

    Office of Scientific and Technical Information (OSTI)

    Speeding access to science information from DOE and Beyond science programs Topic Cool Connections by Kathy Chambers 24 May, 2012 in Products and Content .EDUconnections The coolest people are found on OSTI's .EDUconnections Spotlights. Penn State's Dr. Prabhu and Dr. Paulsonresearch different fields but discovered a possible cure for leukemia over a pizza faculty lunch. Related Topics: .EDUconnections, research, science programs, spotlight

  11. Carolyn Phillips | Argonne National Laboratory

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Employee Spotlights Amenities Social Activities Newcomers/International Assistance Benefits Education Community Diversity Directory Argonne National Laboratory About Safety News Careers Education Community Diversity Directory Energy Environment Security User Facilities Science Work with Argonne Careers Apply for a Job External Applicants Internal Applicants Postdoctoral Applicants Fellowships Students Faculty Programs Why Argonne Your Career Life at Argonne Employee Spotlights Amenities Social

  12. Webinar: Hydrogen Production by Polymer Electrolyte Membrane (PEM)

    Broader source: Energy.gov (indexed) [DOE]

    Electrolysis-Spotlight on Giner and Proton | Department of Energy Above is the video recording for the webinar, "Hydrogen Production by Polymer Electrolyte Membrane (PEM) Electrolysis-Spotlight on Giner and Proton," originally held on May 23, 2011. In addition to this recording, you can access the presentation slides

  13. Conductive lithium storage electrode

    DOE Patents [OSTI]

    Chiang, Yet-Ming; Chung, Sung-Yoon; Bloking, Jason T; Andersson, Anna M

    2014-10-07

    A compound comprising a composition A.sub.x(M'.sub.1-aM''.sub.a).sub.y(XD.sub.4).sub.z, A.sub.x(M'.sub.1-aM''.sub.a).sub.y(DXD.sub.4).sub.z, or A.sub.x(M'.sub.1-aM''.sub.a).sub.y(X.sub.2D.sub.7).sub.z, (A.sub.1-aM''.sub.a).sub.xM'.sub.y(XD.sub.4).sub.z, (A.sub.1-aM''.sub.a).sub.xM'.sub.y(DXD.sub.4).sub.z, or (A.sub.1-aM''.sub.a).sub.xM'.sub.y(X.sub.2D.sub.7).sub.z. In the compound, A is at least one of an alkali metal and hydrogen, M' is a first-row transition metal, X is at least one of phosphorus, sulfur, arsenic, molybdenum, and tungsten, M'' any of a Group IIA, IIIA, IVA, VA, VIA, VIIA, VIIIA, IB, IIB, IIIB, IVB, VB, and VIB metal, D is at least one of oxygen, nitrogen, carbon, or a halogen, 0.0001

  14. High energy neutron Computed Tomography developed

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    objects. May 9, 2014 Neutron tomography horizontal "slice" of a tungsten and polyethylene test object containing tungsten carbide BBs. Neutron tomography horizontal "slice"...

  15. May

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    2014 run cycle. - 52014 Neutron tomography horizontal "slice" of a tungsten and polyethylene test object containing tungsten carbide BBs. High energy neutron Computed...

  16. Solid bromine complexers

    DOE Patents [OSTI]

    Grimes, Patrick G. (Westfield, NJ)

    1987-01-20

    The cell of the invention comprises a housing, a zinc or cadmium anode, a chemically non-reactive counterelectrode and cathodic halogen. The cathodic halogen is selected from chlorine and bromine, and preferably is bromine. The cell also is provided with an aqueous metal halide containing electrolyte in which the metal ions are of the same metal as the metal of the anode and halide anions are of the same halogen as the cathodic halogen material. Importantly, in the present invention, anion exchange resins provide a convenient means for storing the halogen generated during charging of the cell and providing a source of halogen to be used in the discharge of the cell.

  17. SPORTAL3

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    to sportal3?' located at the end of this document. 2 Link to the Halogen site with Internet Explorer: o https:halogen2.ameslab.govHalogenwelcome.jsp o For additional...

  18. RAPID/Roadmap/18-VT-b | Open Energy Information

    Open Energy Info (EERE)

    and Rebuttable presumption for used oil. Used oil containing more than 1000 ppm total halogens is presumed to be a hazardous waste because it has been mixed with halogenated...

  19. Georgia Power - Commercial Energy Efficiency Program | Department...

    Broader source: Energy.gov (indexed) [DOE]

    or halogen: 6.50 LED lamp replacing incandescent or halogen: 9 Lighting Occupancy Sensor: 7 Lighting Daylight Sensor: 25 SplitPackaged Air Conditioners: 20-30ton Split...

  20. Bradbury

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Bradbury Bradbury Events Stay tuned for the Museum's reocurring events such as Science on Tap and Scientist in the Spotlight events. Jan 21 Thu 5:30 PM Science on Tap - Earthquakes...

  1. Press Pass - Press Releases

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    world science spotlight is trained on Fermilab's search for new particles, including the Higgs boson, which is expected to offer important clues to the origin of mass. The lab has...

  2. Kodak: MotorMaster+ Is the Foundation for Energy Efficiency at a Chemical and Imaging Technologies Plant (Revised)

    SciTech Connect (OSTI)

    Not Available

    2007-02-01

    This DOE Industrial Technologies Program spotlight describes how Kodak is saving 5.8 million kWh and $664,000 annually after upgrading or replacing inefficient motors in its Rochester, New York, plant.

  3. Kodak: MotorMaster+ is the Foundation for Energy Efficiency at a Chemical and Imaging Technologies Plant

    SciTech Connect (OSTI)

    2006-10-01

    This DOE Industrial Technologies Program spotlight describes how Kodak is saving 5.8 million kWh and $664,000 annually after upgrading or replacing inefficient motors in its Rochester, New York, plant.

  4. PowerPoint Presentation

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Min Agenda Topic Presenter 10:00 5 Review Agenda Mary Hawken 10:05 15 CFO Spotlight Javier Fernandez Financial Highlights 10:20 30 Review of 1st Quarter Financial Results...

  5. Quality Assurance Exchange April 2009, Volume 5 Issue 1

    Broader source: Energy.gov [DOE]

    Quality Assurance ExchangeA pril 2009, Volume 5 Issue 1 U.S. Department of Energy Office of Quality Assurance Policy and Assistance IN THE SPOTLIGHT: GEORGE DETSIS, PROGRAM MANAGER Analytical Services Program Office of Corporate Safety Programs

  6. 2014 2nd Qtr Package

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    2014 QUARTERLY BUSINESS REVIEW 2 Time Min Agenda Topic Slide Presenter 2:15 5 Review Agenda 2 Mary Hawken 2:20 15 CFO Spotlight Nancy Mitman Financial Highlights 2:35 35 ...

  7. WIPP Attracts International Interest

    Broader source: Energy.gov [DOE]

    CARLSBAD, N.M. – EM’s Waste Isolation Pilot Plant (WIPP) was in the spotlight with two international organizations at meetings held in Europe late last year.

  8. 1998 - 08 | Jefferson Lab

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    August 1998 Fri, 08281998 - 11:00pm Breast Cancer Detector to Begin Clinical Trials (Virginian-Pilot) Wed, 08191998 - 11:00pm Reports Spotlight Free-Electron Lasers...

  9. May 2015 Postings | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    SSL in America-Spotlight on Pixelligent PDF icon May 20, 2015: GATEWAY Demonstration of LED Lighting in a High-Temperature Environment: One Year Later PDF icon May 14, 2015: Some...

  10. January 2015 Postings | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    SSL in America-Spotlight on Lumenetix PDF icon Jan. 22, 2015: GATEWAY Demonstration: LED Lighting in a High-Temperature Environment PDF icon Jan. 13, 2015: A Look Ahead at...

  11. Recent News from the National Labs | Department of Energy

    Office of Energy Efficiency and Renewable Energy (EERE) Indexed Site

    his fascinating story, the latest in our LabSpotlight series. July 9, 2015 Antelope Canyon is a picturesque slot canyon near Chris Deschene's boyhood home in the LeChee Chapter...

  12. Fermilab Today

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    chin. He smiles easily and his gaze captures your attention like a spotlight. An Italian accent adds extra vowels to the end of his words. Read more In the News...

  13. Onondaga County Department of Water Environment Protection: Process Optimization Saves Energy at Metropolitan Syracuse Wastewater Treatment Plant

    SciTech Connect (OSTI)

    Not Available

    2005-12-01

    This DOE Industrial Technologies Program spotlight describes how Onondaga County, New York, is saving nearly 3 million kWh and 270 million Btu annually at a wastewater treatment plant after replacing inefficient motors and upgrading pumps.

  14. Onondaga County Department of Water Environment Protection: Process Optimization Saves Energy at Metropolitan Syracuse Wastewater Treatment Plant

    SciTech Connect (OSTI)

    2010-06-25

    This DOE Industrial Technologies Program spotlight describes how Onondaga County, New York, is saving nearly 3 million kWh and 270 million Btu annually at a wastewater treatment plant after replacing inefficient motors and upgrading pumps.

  15. Happening Now

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Happening Now Happening Now From Nano Days and High-Tech Halloween to conversations with scientists, community events, and everything in between. This is the place to find out what's happening now @ the Bradbury. Contact Marketing, Communications and Event Planning Linda Anderman (505) 665-9196 Email Scientist in the Spotlight Join us at the Museum every second Saturday of the month from 11 AM to 1 PM for a program called Scientist in the Spotlight. This activity features Scientist Ambassadors

  16. OSTI, US Dept of Energy, Office of Scientific and Technical Information |

    Office of Scientific and Technical Information (OSTI)

    Speeding access to science information from DOE and Beyond University of Tennessee Knoxville in DOE's .EDUconnections Spotlight by Kathy Chambers on Tue, Sep 4, 2012 University of Tennessee Knoxville Science is always in the spotlight at the University of Tennessee Knoxville, a land-grant institution and the state's flagship research campus. Recent research might include searching for potential habitats for life on Mars, developing an autotaxin inhibitor to fight cancer, designing a car for

  17. SC e-journals Help page

    Office of Scientific and Technical Information (OSTI)

    Help Table of Contents General User Information Access Technical Requirements Desktop Shortcut Archived Journal Issues Open Access Journals Spotlight Spotlight Archive Alerts E-mailing Search Results Need Help With Searching? 'Web of Science' Search General Search Tips General User Information Access: Access to this site is available only through work stations and remote computers connected to the internet via the Office of Science (SC) Lan. Subscription journals accessible via this site are

  18. STIPWorks | OSTI, US Dept of Energy, Office of Scientific and Technical

    Office of Scientific and Technical Information (OSTI)

    Information Sandia National Laboratories In the Spotlight - A Bold Heritage: Sandia National Laboratories' roots lie in World War II's Manhattan Project. Sandia National Laboratories In the Spotlight - A Bold Heritage: Sandia National Laboratories' roots lie in World War II's Manhattan Project. Department of Energy Announces Increased Access to Results of Scientific Research Department of Energy Announces Increased Access to Results of Scientific Research OSTI Blog OSTI Blog Public Access in

  19. Computing Events

    Broader source: All U.S. Department of Energy (DOE) Office Webpages (Extended Search)

    Events Computing Events Spotlighting the most advanced scientific and technical applications in the world! Featuring exhibits of the latest and greatest technologies from industry, academia and government research organizations; many of these technologies will be seen for the first time in Denver. Supercomputing Conference 13 Denver, Colorado November 17-22, 2013 Spotlighting the most advanced scientific and technical applications in the world, SC13 will bring together the international

  20. OSTI, US Dept of Energy, Office of Scientific and Technical Information |

    Office of Scientific and Technical Information (OSTI)

    Speeding access to science information from DOE and Beyond gets a new look! by Rita Hohenbrink on Thu, Aug 2, 2012 OpenNet gets a new look The newly redesigned OpenNet contains spotlights on declassified collections. This quarter the spotlight is on the Human Radiation Experiments collection. OpenNet provides easy, timely access to the Department of Energy's declassified documents, including information declassified in response to Freedom of Information Act requests. In addition to these