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  1. Fermi Award Winners Saluted | Department of Energy

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

    Fermi Award Winners Saluted Fermi Award Winners Saluted May 9, 2012 - 3:18pm Addthis President Barack Obama greets 2010 Fermi Award recipients Dr. Burton Richter, right, and his wife Laurose, and Dr. Mildred S. Dresselhaus, third from right, and her husband Gene, in the Oval Office, May 7, 2012. (Official White House Photo by Pete Souza) President Barack Obama greets 2010 Fermi Award recipients Dr. Burton Richter, right, and his wife Laurose, and Dr. Mildred S. Dresselhaus, third from right, and

  2. Enrico Fermi Award Ceremony | Department of Energy

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

    Enrico Fermi Award Ceremony Enrico Fermi Award Ceremony June 22, 2006 - 2:31pm Addthis Remarks Prepared for Energy Secretary Samuel Bodman The Department of Energy has a very rich scientific tradition and one of the best things about being Energy Secretary is from time to time I have an opportunity to acknowledge that tradition and the very real impact it continues to have on the lives of all Americans.Today is one of those days. We are here to honor Art Rosenfeld with our nation's highest

  3. Video: Honoring Science that Matters with the Enrico Fermi Award |

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

    Department of Energy Honoring Science that Matters with the Enrico Fermi Award Video: Honoring Science that Matters with the Enrico Fermi Award February 11, 2014 - 9:50am Addthis The Fermi Award is a Presidential award and is one of the oldest and most prestigious science and technology honors bestowed by the U.S. Government. The 2013 winners of the award are Dr. Allen J. Bard, of The University of Texas at Austin, and Dr. Andrew Sessler of the Lawrence Berkeley National Laboratory. Ben

  4. President Obama Names Scientists Bard and Sessler as Enrico Fermi Award

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

    Recipients | Department of Energy Bard and Sessler as Enrico Fermi Award Recipients President Obama Names Scientists Bard and Sessler as Enrico Fermi Award Recipients January 13, 2014 - 1:43pm Addthis NEWS MEDIA CONTACT (202)586-4940 WASHINGTON - President Obama has named Dr. Allen J. Bard and Dr. Andrew Sessler as recipients of the Enrico Fermi Award, one of the government's oldest and most prestigious awards for scientific achievement. The Presidential award carries an honorarium of

  5. Secretary Chu Names 2009 Enrico Fermi Award Winners | Department of Energy

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

    Names 2009 Enrico Fermi Award Winners Secretary Chu Names 2009 Enrico Fermi Award Winners September 17, 2009 - 12:00am Addthis WASHINGTON, DC - US Energy Secretary Steven Chu has named Dr. John Bannister Goodenough and Dr. Siegfried S. Hecker as the winners of the Enrico Fermi Award, one of the most prestigious science and technology awards awarded by the U.S. Government. The Presidential award carries an honorarium of $375,000, which will be shared equally, and a gold medal. The award is

  6. Enrico Fermi Award Nominations | U.S. DOE Office of Science (SC)

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

    Nuclear Security Administration Enrico Fermi Achieves First Self Sustain Nuclear Chain Reaction Enrico Fermi Achieves First Self Sustain Nuclear Chain Reaction Chicago, IL Metallurgical Laboratory scientists led by Enrico Fermi achieve the first self-sustained nuclear chain reaction in pile constructed under the west grandstand at Stagg field in Chicago

    Enrico Fermi Award Nominations News News Home Featured Articles Science Headlines 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006

  7. President Obama Welcomes 2013 Fermi Award Winners to the White House |

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

    Department of Energy Welcomes 2013 Fermi Award Winners to the White House President Obama Welcomes 2013 Fermi Award Winners to the White House February 3, 2014 - 6:24pm Addthis Energy Secretary Ernest Moniz presents the 2013 Enrico Fermi Awards to Dr. Allen J. Bard and Dr. Andrew Sessler in a ceremony at the U.S. Department of Energy in Washington, D.C., on February 3, 2014. Fae Jencks Confidential Assistant, White House Office of Science & Technology Policy Editor's note: This article

  8. Conference: Remembering Fermi | ScienceCinema

    Office of Scientific and Technical Information (OSTI)

    Remembering Fermi Citation Details Title: Remembering Fermi

  9. Fermi Feud

    Broader source: Energy.gov [DOE]

    Enrico Fermi was the first scientist to achieve a nuclear fission chain reaction when he and a group of young scientists were experimenting at the University of Chicago on December 2, 1942. Using a “Jeopardy” format, this game features energy, electricity and nuclear science answers and questions.

  10. Enrico Fermi Patents

    Office of Scientific and Technical Information (OSTI)

    Patents Fermi Home Resources with Additional Information Fermi Honored Atoms for Peace Centennial of Birth Marburger Speech Stamp AudioVideo Clips US PATENT...

  11. Enrico Fermi Patents

    Office of Scientific and Technical Information (OSTI)

    Fermi Home * Resources with Additional Information * Fermi Honored * Atoms for Peace * Centennial of Birth Marburger Speech * Stamp * AudioVideo Clips US PATENT 2,206,634 (Process ...

  12. The Life of Enrico Fermi | U.S. DOE Office of Science (SC)

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

    The Life of Enrico Fermi The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us The Life of Enrico Fermi Print Text Size: A A A FeedbackShare Page Enrico Fermi Click for a story about the photograph On December 2, 1942, Enrico Fermi and his team of

  13. Enrico Fermi: Audio/Video Clips

    Office of Scientific and Technical Information (OSTI)

    AudioVideo Clips Fermi Home * Resources with Additional Information * Fermi Honored * Atoms for Peace * Centennial of Birth Marburger Speech * Stamp * Patents Video Clip Fermi's ...

  14. Michigan Nuclear Profile - Fermi

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

    Fermi" "Unit","Summer capacity (mw)","Net generation (thousand mwh)","Summer capacity factor (percent)","Type","Commercial operation date","License expiration date" 2,"1,085","7,738",81.4,"BWR","application/vnd.ms-excel","application/vnd.ms-excel" ,"

  15. Fermi National Accelerator Laboratory FERMILAB-Conf-94/419-E

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

    Fermi Award Winners Saluted Fermi Award Winners Saluted May 9, 2012 - 3:18pm Addthis President Barack Obama greets 2010 Fermi Award recipients Dr. Burton Richter, right, and his wife Laurose, and Dr. Mildred S. Dresselhaus, third from right, and her husband Gene, in the Oval Office, May 7, 2012. (Official White House Photo by Pete Souza) President Barack Obama greets 2010 Fermi Award recipients Dr. Burton Richter, right, and his wife Laurose, and Dr. Mildred S. Dresselhaus, third from right, and

  16. An Iridate with Fermi Arcs

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

    An Iridate with Fermi Arcs An Iridate with Fermi Arcs Print Wednesday, 29 October 2014 00:00 Researchers have discovered that "Fermi arcs," which are much-debated features found in the electronic structure of high-temperature superconducting (HTSC) cuprates, can also be found in an iridate (iridium oxide) compound. At the ALS, the researchers observed the electronic structure of strontium iridate as it evolved through different doping levels and temperatures by using angle-resolved

  17. An Iridate with Fermi Arcs

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

    of a broken Fermi surface. In conventional superconductors, the superconducting gap-an indicator of superconductivity-vanishes above the superconducting transition temperature...

  18. Named Fellowships Luminary - Enrico Fermi | Argonne National...

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

    Enrico Fermi Enrico Fermi was born in Rome, Italy on September 29, 1901. Fermi was an Italian physicist, best known for having built the Chicago Pile-1 (the first nuclear...

  19. President Obama Names Scientists Pellegrini and Shank as 2014 Enrico Fermi

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

    Award Recipients | Department of Energy Names Scientists Pellegrini and Shank as 2014 Enrico Fermi Award Recipients President Obama Names Scientists Pellegrini and Shank as 2014 Enrico Fermi Award Recipients June 8, 2015 - 3:30pm Addthis News Media Contact (202) 586-4940 newmedia@hq.doe.gov WASHINGTON - President Obama has named Dr. Claudio Pellegrini and Dr. Charles V. (Chuck) Shank as recipients of the Enrico Fermi Award, one of the government's oldest and most prestigious awards for

  20. Enrico Fermi Awards Ceremony for Dr. Allen J. Bard and Dr. Andrew Sessler, February 2014 (Presentations, including remarks by Energy Secretary, Dr. Ernest Moniz)

    ScienceCinema (OSTI)

    Moniz, Ernest [U.S. Energy Secretary

    2014-08-22

    The Fermi Award is a Presidential award and is one of the oldest and most prestigious science and technology honors bestowed by the U.S. Government. On February 3, 2014 it was conferred upon two exceptional scientists. The first to be recognized is Dr. Allen J. Bard, 'for international leadership in electrochemical science and technology, for advances in photoelectrochemistry and photocatalytic materials, processes, and devices, and for discovery and development of electrochemical methods including electrogenerated chemiluminescence and scanning electrochemical microscopy.' The other honoree is Dr. Andrew Sessler, 'for advancing accelerators as powerful tools of scientific discovery, for visionary direction of the research enterprise focused on challenges in energy and the environment, and for championing outreach and freedom of scientific inquiry worldwide.' Dr. Patricia Dehmer opened the ceremony, and Dr. Ernest Moniz presented the awards.

  1. An Iridate with Fermi Arcs

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

    An Iridate with Fermi Arcs Print Researchers have discovered that "Fermi arcs," which are much-debated features found in the electronic structure of high-temperature superconducting (HTSC) cuprates, can also be found in an iridate (iridium oxide) compound. At the ALS, the researchers observed the electronic structure of strontium iridate as it evolved through different doping levels and temperatures by using angle-resolved photoemission spectroscopy (ARPES) with in situ electron doping

  2. An Iridate with Fermi Arcs

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

    An Iridate with Fermi Arcs Print Researchers have discovered that "Fermi arcs," which are much-debated features found in the electronic structure of high-temperature superconducting (HTSC) cuprates, can also be found in an iridate (iridium oxide) compound. At the ALS, the researchers observed the electronic structure of strontium iridate as it evolved through different doping levels and temperatures by using angle-resolved photoemission spectroscopy (ARPES) with in situ electron doping

  3. An Iridate with Fermi Arcs

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

    An Iridate with Fermi Arcs Print Researchers have discovered that "Fermi arcs," which are much-debated features found in the electronic structure of high-temperature superconducting (HTSC) cuprates, can also be found in an iridate (iridium oxide) compound. At the ALS, the researchers observed the electronic structure of strontium iridate as it evolved through different doping levels and temperatures by using angle-resolved photoemission spectroscopy (ARPES) with in situ electron doping

  4. An Iridate with Fermi Arcs

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

    An Iridate with Fermi Arcs Print Researchers have discovered that "Fermi arcs," which are much-debated features found in the electronic structure of high-temperature superconducting (HTSC) cuprates, can also be found in an iridate (iridium oxide) compound. At the ALS, the researchers observed the electronic structure of strontium iridate as it evolved through different doping levels and temperatures by using angle-resolved photoemission spectroscopy (ARPES) with in situ electron doping

  5. An Iridate with Fermi Arcs

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

    An Iridate with Fermi Arcs Print Researchers have discovered that "Fermi arcs," which are much-debated features found in the electronic structure of high-temperature superconducting (HTSC) cuprates, can also be found in an iridate (iridium oxide) compound. At the ALS, the researchers observed the electronic structure of strontium iridate as it evolved through different doping levels and temperatures by using angle-resolved photoemission spectroscopy (ARPES) with in situ electron doping

  6. An Iridate with Fermi Arcs

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

    An Iridate with Fermi Arcs Print Researchers have discovered that "Fermi arcs," which are much-debated features found in the electronic structure of high-temperature superconducting (HTSC) cuprates, can also be found in an iridate (iridium oxide) compound. At the ALS, the researchers observed the electronic structure of strontium iridate as it evolved through different doping levels and temperatures by using angle-resolved photoemission spectroscopy (ARPES) with in situ electron doping

  7. An Iridate with Fermi Arcs

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

    An Iridate with Fermi Arcs Print Researchers have discovered that "Fermi arcs," which are much-debated features found in the electronic structure of high-temperature superconducting (HTSC) cuprates, can also be found in an iridate (iridium oxide) compound. At the ALS, the researchers observed the electronic structure of strontium iridate as it evolved through different doping levels and temperatures by using angle-resolved photoemission spectroscopy (ARPES) with in situ electron doping

  8. Enrico Fermi Awards Ceremony for Dr. Mildred S. Dresselhaus and Dr. Burton Richter, May 2012 (Presentations, including remarks by Energy Secretary, Dr. Steven Chu)

    ScienceCinema (OSTI)

    Chu, Steven (U.S. Energy Secretary)

    2012-06-28

    The Fermi Award is a Presidential award and is one of the oldest and most prestigious science and technology honors bestowed by the U.S. Government. On May 7, 2012 it was conferred upon two exceptional scientists: Dr. Mildred Dresselhaus, 'for her scientific leadership, her major contributions to science and energy policy, her selfless work in science education and the advancement of diversity in the scientific workplace, and her highly original and impactful research,' and Dr. Burton Richter, 'for the breadth of his influence in the multiple disciplines of accelerator physics and particle physics, his profound scientific discoveries, his visionary leadership as SLAC Director, his leadership of science, and his notable contributions in energy and public policy.' Dr. John Holder, Director of the White House Office of Science and Technology Policy, opened the ceremony, and Dr. Bill Brinkman, Director of DOE's Office of Science introduced the main speaker, Dr. Steven Chu, U.S. Energy Secretary.

  9. U.S. Department of Energy, Secretary Chu Names 2009 Enrico Fermi...

    Office of Scientific and Technical Information (OSTI)

    John Bannister Goodenough and Dr. Siegfried S. Hecker as the winners of the Enrico Fermi Award, one of the most prestigious science and technology awards awarded by the U.S. ...

  10. Enrico Fermi's Impact on Science - John Marburger Speech

    Office of Scientific and Technical Information (OSTI)

    Fermi Home * Resources with Additional Information * Fermi Honored * Atoms for Peace * Centennial of Birth Stamp * Patents * AudioVideo Clips Enrico Fermi's Impact on Science ...

  11. FermiCulture Subscription Form

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

    The FermiCulture email list is used to send email announcements and reminders about upcoming cultural events at Fermilab (e.g., the Fermilab Arts, Film, and Lecture series). This is a private, announcement-only mail list and will never be used for spamming or discussions. Subscribers receive approximately five emails per month. Use the form below to subscribe to (or unsubscribe from) the FermiCulture list. Email address: Name (First Last): Subscribe to email list Unsubscribe from email list Send

  12. Fermi Timing and Synchronization System

    SciTech Connect (OSTI)

    Wilcox, R.; Staples, J.; Doolittle, L.; Byrd, J.; Ratti, A.; Kaertner, F.X.; Kim, J.; Chen, J.; Ilday, F.O.; Ludwig, F.; Winter, A.; Ferianis, M.; Danailov, M.; D'Auria, G.

    2006-07-19

    The Fermi FEL will depend critically on precise timing of its RF, laser and diagnostic subsystems. The timing subsystem to coordinate these functions will need to reliably maintain sub-100fs synchronicity between distant points up to 300m apart in the Fermi facility. The technology to do this is not commercially available, and has not been experimentally demonstrated in a working facility. Therefore, new technology must be developed to meet these needs. Two approaches have been researched by different groups working with the Fermi staff. At MIT, a pulse transmission scheme has been developed for synchronization of RF and laser devices. And at LBL, a CW transmission scheme has been developed for RF and laser synchronization. These respective schemes have advantages and disadvantages that will become better understood in coming years. This document presents the work done by both teams, and suggests a possible system design which integrates them both. The integrated system design provides an example of how choices can be made between the different approaches without significantly changing the basic infrastructure of the system. Overall system issues common to any synchronization scheme are also discussed.

  13. Fermi arcs vs. fermi pockets in electron-doped perovskite iridates (Journal

    Office of Scientific and Technical Information (OSTI)

    Article) | SciTech Connect SciTech Connect Search Results Journal Article: Fermi arcs vs. fermi pockets in electron-doped perovskite iridates Citation Details In-Document Search Title: Fermi arcs vs. fermi pockets in electron-doped perovskite iridates We report on an angle resolved photoemission (ARPES) study of bulk electron-doped perovskite iridate, (Sr1-xLax)₃Ir₂O₇. Fermi surface pockets are observed with a total electron count in keeping with that expected from La substitution.

  14. Enrico Fermi and the First Self-Sustaining Nuclear Chain Reaction

    Office of Scientific and Technical Information (OSTI)

    Enrico Fermi and the First Self-Sustaining Nuclear Chain Reaction Resources with Additional Information * Fermi Honored * Atoms for Peace * Centennial of Birth * Stamp Patents * Audio/Video Clips * Selected by NSTA for SciLinks "The President of the United States of America ... for especially meritorious contributions to the development, use, or control of atomic energy, grant[s] an award of merit to Enrico Fermi for his contributions to basic neutron physics and the achievement of the

  15. Fermi Energy Tuning with Light to Control Doping Profiles During...

    Office of Scientific and Technical Information (OSTI)

    Fermi Energy Tuning with Light to Control Doping Profiles During Epitaxy; Article No. 182105 Citation Details In-Document Search Title: Fermi Energy Tuning with Light to Control ...

  16. ORISE: PeerNet® used to support DOE's Office of Science Enrico Fermi

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

    Award selection ORAU PeerNet® used to support DOE's Office of Science Enrico Fermi Award selection Peer review tool provided secure access for evaluating award nominees FOR IMMEDIATE RELEASE Feb. 5, 2014 FY14-08 WASHINGTON, D.C.-ORAU's electronic peer review and evaluation system, PeerNet®, was used to support the selection of recipients for the U.S. Department of Energy's (DOE) Office of Science Enrico Fermi Award, a prestigious award presented by U.S. Secretary of Energy Dr. Ernest Moniz

  17. Traveling dark solitons in superfluid Fermi gases

    SciTech Connect (OSTI)

    Liao Renyuan; Brand, Joachim

    2011-04-15

    Families of dark solitons exist in superfluid Fermi gases. The energy-velocity dispersion and number of depleted particles completely determine the dynamics of dark solitons on a slowly varying background density. For the unitary Fermi gas, we determine these relations from general scaling arguments and conservation of local particle number. We find solitons to oscillate sinusoidally at the trap frequency reduced by a factor of 1/{radical}(3). Numerical integration of the time-dependent Bogoliubov-de Gennes equation determines spatial profiles and soliton-dispersion relations across the BEC-BCS crossover, and proves consistent with the scaling relations at unitarity.

  18. 2013 Annual Planning Summary for the FERMI Site Office

    Broader source: Energy.gov [DOE]

    The ongoing and projected Environmental Assessments and Environmental Impact Statements for 2013 and 2014 within the FERMI Site Office.

  19. 2012 Annual Planning Summary for Fermi Site Office

    Broader source: Energy.gov [DOE]

    The ongoing and projected Environmental Assessments and Environmental Impact Statements for 2012 and 2013 within Fermi Site Office.

  20. FERMI LARGE AREA TELESCOPE SECOND SOURCE CATALOG

    SciTech Connect (OSTI)

    Nolan, P. L.; Ajello, M.; Allafort, A.; Bechtol, K.; Berenji, B.; Blandford, R. D.; Bloom, E. D.; Abdo, A. A.; Ackermann, M.; Antolini, E.; Bonamente, E.; Atwood, W. B.; Belfiore, A.; Axelsson, M.; Baldini, L.; Bellazzini, R.; Ballet, J.; Bastieri, D.; Bignami, G. F. E-mail: Gino.Tosti@pg.infn.it E-mail: tburnett@u.washington.edu; and others

    2012-04-01

    We present the second catalog of high-energy {gamma}-ray sources detected by the Large Area Telescope (LAT), the primary science instrument on the Fermi Gamma-ray Space Telescope (Fermi), derived from data taken during the first 24 months of the science phase of the mission, which began on 2008 August 4. Source detection is based on the average flux over the 24 month period. The second Fermi-LAT catalog (2FGL) includes source location regions, defined in terms of elliptical fits to the 95% confidence regions and spectral fits in terms of power-law, exponentially cutoff power-law, or log-normal forms. Also included are flux measurements in five energy bands and light curves on monthly intervals for each source. Twelve sources in the catalog are modeled as spatially extended. We provide a detailed comparison of the results from this catalog with those from the first Fermi-LAT catalog (1FGL). Although the diffuse Galactic and isotropic models used in the 2FGL analysis are improved compared to the 1FGL catalog, we attach caution flags to 162 of the sources to indicate possible confusion with residual imperfections in the diffuse model. The 2FGL catalog contains 1873 sources detected and characterized in the 100 MeV to 100 GeV range of which we consider 127 as being firmly identified and 1171 as being reliably associated with counterparts of known or likely {gamma}-ray-producing source classes.

  1. Pairing, pseudogap and Fermi arcs in cuprates

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

    Kaminski, Adam; Kondo, Takeshi; Takeuchi, Tsunehiro; Gu, Genda

    2014-04-29

    We use Angle Resolved Photoemission Spectroscopy (ARPES) to study the relationship between the pseudogap, pairing and Fermi arcs in cuprates. High quality data measured over a wide range of dopings reveals a consistent picture of Fermiology and pairing in these materials. The pseudogap is due to an ordered state that competes with superconductivity rather than preformed pairs. Pairing does occur below Tpair ~ 150K and significantly above Tc, but well below T* and the doping dependence of this temperature scale is distinct from that of the pseudogap. The d-wave gap is present below Tpair, and its interplay with strong scatteringmore » creates “artificial” Fermi arcs for Tc ≤ T ≤ Tpair. However, above Tpair, the pseudogap exists only at the antipodal region. This leads to presence of real, gapless Fermi arcs close to the node. The length of these arcs remains constant up to T*, where the full Fermi surface is recovered. As a result, we demonstrate that these findings resolve a number of seemingly contradictory scenarios.« less

  2. Pairing, pseudogap and Fermi arcs in cuprates

    SciTech Connect (OSTI)

    Kaminski, Adam; Kondo, Takeshi; Takeuchi, Tsunehiro; Gu, Genda

    2014-04-29

    We use Angle Resolved Photoemission Spectroscopy (ARPES) to study the relationship between the pseudogap, pairing and Fermi arcs in cuprates. High quality data measured over a wide range of dopings reveals a consistent picture of Fermiology and pairing in these materials. The pseudogap is due to an ordered state that competes with superconductivity rather than preformed pairs. Pairing does occur below Tpair ~ 150K and significantly above Tc, but well below T* and the doping dependence of this temperature scale is distinct from that of the pseudogap. The d-wave gap is present below Tpair, and its interplay with strong scattering creates artificial Fermi arcs for Tc ? T ? Tpair. However, above Tpair, the pseudogap exists only at the antipodal region. This leads to presence of real, gapless Fermi arcs close to the node. The length of these arcs remains constant up to T*, where the full Fermi surface is recovered. As a result, we demonstrate that these findings resolve a number of seemingly contradictory scenarios.

  3. Enrico Fermi Achieves First Self Sustain Nuclear Chain Reaction | National

    National Nuclear Security Administration (NNSA)

    Nuclear Security Administration Enrico Fermi Achieves First Self Sustain Nuclear Chain Reaction Enrico Fermi Achieves First Self Sustain Nuclear Chain Reaction Chicago, IL Metallurgical Laboratory scientists led by Enrico Fermi achieve the first self-sustained nuclear chain reaction in pile constructed under the west grandstand at Stagg field in Chicago

  4. Unconventional Fermi surface in an insulating state

    SciTech Connect (OSTI)

    Harrison, Neil; Tan, B. S.; Hsu, Y. -T.; Zeng, B.; Hatnean, M. Ciomaga; Zhu, Z.; Hartstein, M.; Kiourlappou, M.; Srivastava, A.; Johannes, M. D.; Murphy, T. P.; Park, J. -H.; Balicas, L.; Lonzarich, G. G.; Balakrishnan, G.; Sebastian, Suchitra E.

    2015-07-17

    Insulators occur in more than one guise; a recent finding was a class of topological insulators, which host a conducting surface juxtaposed with an insulating bulk. Here, we report the observation of an unusual insulating state with an electrically insulating bulk that simultaneously yields bulk quantum oscillations with characteristics of an unconventional Fermi liquid. We present quantum oscillation measurements of magnetic torque in high-purity single crystals of the Kondo insulator SmB6, which reveal quantum oscillation frequencies characteristic of a large three-dimensional conduction electron Fermi surface similar to the metallic rare earth hexaborides such as PrB6 and LaB6. As a result, the quantum oscillation amplitude strongly increases at low temperatures, appearing strikingly at variance with conventional metallic behavior.

  5. 2016_FEB.FermiOrgChart

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

    Organization Fermi Research Alliance, LLC Neutrino Division Gina Rameika Particle Physics Division Patricia McBride Office of the CRO Joe Lykken Chief Research Officer Fermilab Center for Particle Astrophysics Craig Hogan CMS Center Kevin Burkett Office of the General Counsel John Myer Office of Integrated Planning & Performance Management Erik Gottschalk Workforce Development & Resources Section Kay Van Vreede Office of the COO Timothy Meyer Chief Operating Officer Office of

  6. Fermi arcs vs. fermi pockets in electron-doped perovskite iridates

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

    He, Junfeng; Hafiz, H.; Mion, Thomas R.; Hogan, T.; Dhital, C.; Chen, X.; Lin, Qisen; Hashimoto, M.; Lu, D. H.; Zhang, Y.; et al

    2015-02-23

    We report on an angle resolved photoemission (ARPES) study of bulk electron-doped perovskite iridate, (Sr1-xLax)₃Ir₂O₇. Fermi surface pockets are observed with a total electron count in keeping with that expected from La substitution. Depending on the energy and polarization of the incident photons, these pockets show up in the form of disconnected “Fermi arcs”, reminiscent of those reported recently in surface electron-doped Sr₂IrO₄. Our observed spectral variation is consistent with the coexistence of an electronic supermodulation with structural distortion in the system.

  7. Towards a Holographic Marginal Fermi Liquid (Journal Article...

    Office of Scientific and Technical Information (OSTI)

    Language: English Subject: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; BRANES; DEFECTS; FERMI GAS; FERMIONS; FIELD THEORIES; ...

  8. 2011 Annual Planning Summary for Fermi Site Office (FSO)

    Broader source: Energy.gov [DOE]

    The ongoing and projected Environmental Assessments and Environmental Impact Statements for 2011 and 2012 within the Fermi Site Office (See Science APS).

  9. Enrico Fermi Achieves First Self Sustain Nuclear Chain Reaction...

    National Nuclear Security Administration (NNSA)

    Self Sustain Nuclear Chain Reaction Chicago, IL Metallurgical Laboratory scientists led by Enrico Fermi achieve the first self-sustained nuclear chain reaction in pile...

  10. I Fermi National Accelerator Laboratory I I

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

    b .?.? ... . . 1- \r I Fermi National Accelerator Laboratory I I FERMILAB-Cdnf-76 159 -EXP 2 020,000 2 02 2.000 I 1 (Submitted to the Neutrino I 9 76 Conference Aachen, Germany June 8r-13, -1976) * I 4 DISCLAIMER This report was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor any agency thereof, nor any of their employees, make any warranty, express or implied, or assumes any legal liability or responsibility for the

  11. Fermi LAT Observations of LS 5039

    SciTech Connect (OSTI)

    Abdo, A.A.; Ackermann, M.; Ajello, M.; Atwood, W.B.; Axelsson, M.; Baldini, L.; Ballet, J.; Barbiellini, G.; Bastieri, D.; Baughman, B.M.; Bechtol, K.; Bellazzini, R.; Berenji, B.; Blandford, R.D.; Bloom, E.D.; Bonamente, E.; Borgland, A.W.; Bregeon, J.; Brez, A.; Brigida, M.; Bruel, P.; /more authors..

    2012-03-29

    The first results from observations of the high-mass X-ray binary LS 5039 using the Fermi Gamma-ray Space Telescope data between 2008 August and 2009 June are presented. Our results indicate variability that is consistent with the binary period, with the emission being modulated with a period of 3.903 {+-} 0.005 days; the first detection of this modulation at GeV energies. The light curve is characterized by a broad peak around superior conjunction in agreement with inverse Compton scattering models. The spectrum is represented by a power law with an exponential cutoff, yielding an overall flux (100 MeV-300 GeV) of 4.9 {+-} 0.5(stat) {+-} 1.8(syst) x 10{sup -7} photon cm{sup -2} s{sup -1}, with a cutoff at 2.1 {+-} 0.3(stat) {+-} 1.1(syst) GeV and photon index {Gamma} = 1.9 {+-} 0.1(stat) {+-} 0.3(syst). The spectrum is observed to vary with orbital phase, specifically between inferior and superior conjunction. We suggest that the presence of a cutoff in the spectrum may be indicative of magnetospheric emission similar to the emission seen in many pulsars by Fermi.

  12. "Where is Everybody?" An Account of Fermi's Question

    DOE R&D Accomplishments [OSTI]

    Jones, E. M.

    1985-03-01

    Enrico Fermi's famous question, now central to debates about the prevalence of extraterrestrial civilizations, arose during a luncheon conversation with Emil Konopinski, Edward Teller, and Herbert York in the summer of 1950. Fermi's companions on that day have provided accounts of the incident.

  13. Momentum sharing in imbalanced Fermi systems

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

    Hen, O.; Sargsian, M.; Weinstein, L. B.; Piasetzky, E.

    2014-10-16

    The atomic nucleus is composed of two different kinds of fermions, protons and neutrons. If the protons and neutrons did not interact, the Pauli exclusion principle would force the majority fermions (usually neutrons) to have a higher average momentum. Our high-energy electron scattering measurements using 12C, 27Al, 56Fe and 208Pb targets show that, even in heavy neutron-rich nuclei, short-range interactions between the fermions form correlated high-momentum neutron-proton pairs. Thus, in neutron-rich nuclei, protons have a greater probability than neutrons to have momentum greater than the Fermi momentum. This finding has implications ranging from nuclear few body systems to neutron starsmore » and may also be observable experimentally in two-spin state, ultra-cold atomic gas systems.« less

  14. Momentum sharing in imbalanced Fermi systems

    SciTech Connect (OSTI)

    Hen, O. [Tel Aviv Univ., Tel Aviv (Israel); Sargsian, M. [Florida International Univ., Miami, FL (United States); Weinstein, L. B. [Old Dominion Univ., Norfolk, VA (United States); Piasetzky, E. [Tel Aviv Univ., Tel Aviv (Israel), et. al.

    2014-10-30

    The atomic nucleus is composed of two different kinds of fermions, protons and neutrons. If the protons and neutrons did not interact, the Pauli exclusion principle would force the majority fermions (usually neutrons) to have a higher average momentum. Our high-energy electron scattering measurements using 12C, 27Al, 56Fe and 208Pb targets show that, even in heavy neutron-rich nuclei, short-range interactions between the fermions form correlated high-momentum neutron-proton pairs. Thus, in neutron-rich nuclei, protons have a greater probability than neutrons to have momentum greater than the Fermi momentum. This finding has implications ranging from nuclear few body systems to neutron stars and may also be observable experimentally in two-spin state, ultra-cold atomic gas systems.

  15. Fermi Large Area Telescope Observations of the Supernova Remnant...

    Office of Scientific and Technical Information (OSTI)

    Fermi Large Area Telescope Observations of the Supernova Remnant G8.7-0.1 Citation Details ... Language: English Subject: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 72 PHYSICS ...

  16. Enrico Fermi's Impact on Science - John Marburger Speech

    Office of Scientific and Technical Information (OSTI)

    essentials. Later, when I came to know Fermi and Dirac, I realized that they spoke and thought about physics very much in the way that I had imagined them to do from studying...

  17. "Doing Business with Argonne and Fermi National Laboratories...

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

    "Doing Business with Argonne and Fermi National Laboratories" 2014 Argonne-Fermilab Small Business Fair 1 of 20 2014 Argonne-Fermilab Small Business Fair On Aug. 28, 2014, Argonne...

  18. Phase Imprinting in Equilibrating Fermi Gases: The Transience of Vortex

    Office of Scientific and Technical Information (OSTI)

    Rings and Other Defects (Journal Article) | DOE PAGES Phase Imprinting in Equilibrating Fermi Gases: The Transience of Vortex Rings and Other Defects « Prev Next » Title: Phase Imprinting in Equilibrating Fermi Gases: The Transience of Vortex Rings and Other Defects Authors: Scherpelz, Peter ; Padavić, Karmela ; Rançon, Adam ; Glatz, Andreas ; Aranson, Igor S. ; Levin, K. Publication Date: 2014-09-16 OSTI Identifier: 1180434 Type: Publisher's Accepted Manuscript Journal Name: Physical

  19. Phase Imprinting in Equilibrating Fermi Gases: The Transience of Vortex

    Office of Scientific and Technical Information (OSTI)

    Rings and Other Defects (Journal Article) | SciTech Connect Phase Imprinting in Equilibrating Fermi Gases: The Transience of Vortex Rings and Other Defects Citation Details In-Document Search Title: Phase Imprinting in Equilibrating Fermi Gases: The Transience of Vortex Rings and Other Defects Authors: Scherpelz, Peter ; Padavić, Karmela ; Rançon, Adam ; Glatz, Andreas ; Aranson, Igor S. ; Levin, K. Publication Date: 2014-09-16 OSTI Identifier: 1180434 Type: Publisher's Accepted Manuscript

  20. Correlation between Fermi surface transformations and superconductivity in

    Office of Scientific and Technical Information (OSTI)

    the electron-doped high- T c superconductor Nd 2 - x Ce x CuO 4 (Journal Article) | SciTech Connect Journal Article: Correlation between Fermi surface transformations and superconductivity in the electron-doped high- T c superconductor Nd 2 - x Ce x CuO 4 Citation Details In-Document Search This content will become publicly available on August 31, 2016 Title: Correlation between Fermi surface transformations and superconductivity in the electron-doped high- T c superconductor Nd 2 - x Ce x

  1. Kondo effect and non-Fermi-liquid behavior in Dirac and Weyl...

    Office of Scientific and Technical Information (OSTI)

    Kondo effect and non-Fermi-liquid behavior in Dirac and Weyl semimetals Citation Details ... Title: Kondo effect and non-Fermi-liquid behavior in Dirac and Weyl semimetals Authors: ...

  2. Kondo effect and non-Fermi-liquid behavior in Dirac and Weyl...

    Office of Scientific and Technical Information (OSTI)

    non-Fermi-liquid behavior in Dirac and Weyl semimetals This content will become publicly available on July 7, 2016 Title: Kondo effect and non-Fermi-liquid behavior in Dirac and ...

  3. Fermi Gamma-Ray Space Telescope: High-Energy Results From the...

    Office of Scientific and Technical Information (OSTI)

    Fermi Gamma-Ray Space Telescope: High-Energy Results From the First Year Citation Details In-Document Search Title: Fermi Gamma-Ray Space Telescope: High-Energy Results From the ...

  4. Fermi Site Office Homepage | U.S. DOE Office of Science (SC)

    Office of Science (SC) Website

    Home Fermi Site Office (FSO) FSO Home About Projects Contract Management NEPA Documents Resources Contact Information Fermi Site Office U.S. Department of Energy MS 118 P.O. Box ...

  5. The Search of Axion-Like-Particles With Fermi and Cherenkov Telescopes...

    Office of Scientific and Technical Information (OSTI)

    The Search of Axion-Like-Particles With Fermi and Cherenkov Telescopes Citation Details In-Document Search Title: The Search of Axion-Like-Particles With Fermi and Cherenkov...

  6. U.S. Department of Energy Awards Contract for Management and Operation of

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

    Fermi National Accelerator Laboratory to the Fermi Research Alliance, LLC | Department of Energy Fermi National Accelerator Laboratory to the Fermi Research Alliance, LLC U.S. Department of Energy Awards Contract for Management and Operation of Fermi National Accelerator Laboratory to the Fermi Research Alliance, LLC November 1, 2006 - 9:25am Addthis BATAVIA, ILLINOIS -- The U.S. Department of Energy (DOE) has awarded a new $1.575 billion, five-year contract for management and operation of

  7. R&D 100 Awards | U.S. DOE Office of Science (SC)

    Office of Science (SC) Website

    About About Home Organization Budget Field Offices Federal ... The Enrico Fermi Award The Ernest Orlando Lawrence Award DOE ... Development Awards 2002: 22 2001: 26 DOE-Funded Research ...

  8. A Southern Sky Survey with Fermi LAT and ASKAP

    SciTech Connect (OSTI)

    Cameron, Robert A.; /SLAC /KIPAC, Menlo Park

    2010-04-29

    We present the prospects for a future joint gamma-ray and radio survey of southern hemisphere sources using the Fermi Large Area Telescope (LAT) and the upcoming Australian Square Kilometre Array Pathfinder (ASKAP) radio telescope. ASKAP is a next generation radio telescope designed to perform surveys at GHz frequencies at a much higher survey speed than previous radio telescopes, and is scheduled to start engineering observations in 2011. The survey capabilities of both Fermi LAT and ASKAP are described, and the planned science surveys for ASKAP are summarized. We give some expected details of the Variable and Slow Transient (VAST) survey using ASKAP, which will search for transients on timescales from 5 seconds to years. Some observational properties of faint and transient sources seen at gamma-ray and radio wavelengths are summarized, and prospects and strategies for using ASKAP survey data for LAT source counterpart identification are summarized.

  9. Unconventional interaction between vortices in a polarized Fermi gas

    SciTech Connect (OSTI)

    Stojanovic, Vladimir M.; Vincent Liu, W. Kim, Yong Baek

    2008-04-15

    Recently, a homogeneous superfluid state with a single gapless Fermi surface was predicted to be the ground state of an ultracold Fermi gas with spin population imbalance in the regime of molecular Bose-Einstein condensation. We study vortices in this novel state using a symmetry-based effective field theory, which captures the low-energy physics of gapless fermions and superfluid phase fluctuations. This theory is applicable to all spin-imbalanced ultracold Fermi gases in the superfluid regime, regardless of whether the original fermion-pairing interaction is weak or strong. We find a remarkable, unconventional form of the interaction between vortices. The presence of gapless fermions gives rise to a spatially oscillating potential, akin to the RKKY indirect-exchange interaction in non-magnetic metals. We compare the parameters of the effective theory to the experimentally measurable quantities and further discuss the conditions for the verification of the predicted new feature. Our study opens up an interesting question as to the nature of the vortex lattice resulting from the competition between the usual repulsive logarithmic (2D Coulomb) and predominantly attractive fermion-induced interactions.

  10. CLUSTERING OF ?-RAY-SELECTED 2LAC FERMI BLAZARS

    SciTech Connect (OSTI)

    Allevato, V.; Finoguenov, A.; Cappelluti, N.

    2014-12-20

    We present the first measurement of the projected correlation function of 485 ?-ray-selected blazars, divided into 175 BL Lacertae (BL Lacs) and 310 flat-spectrum radio quasars (FSRQs) detected in the 2 year all-sky survey by the Fermi-Large Area Telescope. We find that Fermi BL Lacs and FSRQs reside in massive dark matter halos (DMHs) with log M{sub h} = 13.35{sub ?0.14}{sup +0.20} and log M{sub h} = 13.40{sub ?0.19}{sup +0.15} h {sup 1} M {sub ?}, respectively, at low (z ? 0.4) and high (z ? 1.2) redshift. In terms of clustering properties, these results suggest that BL Lacs and FSRQs are similar objects residing in the same dense environment typical of galaxy groups, despite their different spectral energy distributions, power, and accretion rates. We find no difference in the typical bias and hosting halo mass between Fermi blazars and radio-loud active galactic nuclei (AGNs), supporting the unification scheme simply equating radio-loud objects with misaligned blazar counterparts. This similarity in terms of the typical environment they preferentially live in, suggests that blazars tend to occupy the center of DMHs, as already pointed out for radio-loud AGNs. This implies, in light of several projects looking for the ?-ray emission from DM annihilation in galaxy clusters, a strong contamination from blazars to the expected signal from DM annihilation.

  11. Generalized charge-screening in relativistic ThomasFermi model

    SciTech Connect (OSTI)

    Akbari-Moghanjoughi, M.

    2014-10-15

    In this paper, we study the charge shielding within the relativistic Thomas-Fermi model for a wide range of electron number-densities and the atomic-number of screened ions. A generalized energy-density relation is obtained using the force-balance equation and taking into account the Chandrasekhar's relativistic electron degeneracy pressure. By numerically solving a second-order nonlinear differential equation, the Thomas-Fermi screening length is investigated, and the results are compared for three distinct regimes of the solid-density, warm-dense-matter, and white-dwarfs (WDs). It is revealed that our nonlinear screening theory is compatible with the exponentially decaying Thomas-Fermi-type shielding predicted by the linear response theory. Moreover, the variation of relative Thomas-Fermi screening length shows that extremely dense quantum electron fluids are relatively poor charge shielders. Calculation of the total number of screening electrons around a nucleus shows that there is a position of maximum number of screening localized electrons around the screened nucleus, which moves closer to the point-like nucleus by increase in the plasma number density but is unaffected due to increase in the atomic-number value. It is discovered that the total number of screening electrons, (N{sub s}?r{sub TF}{sup 3}/r{sub d}{sup 3} where r{sub TF} and r{sub d} are the Thomas-Fermi and interparticle distance, respectively) has a distinct limit for extremely dense plasmas such as WD-cores and neutron star crusts, which is unique for all given values of the atomic-number. This is equal to saying that in an ultrarelativistic degeneracy limit of electron-ion plasma, the screening length couples with the system dimensionality and the plasma becomes spherically self-similar. Current analysis can provide useful information on the effects of relativistic correction to the charge screening for a wide range of plasma density, such as the inertial-confined plasmas and compact stellar objects.

  12. Maximal Cherenkov ?-radiation on Fermi-surface of compact stars

    SciTech Connect (OSTI)

    Akbari-Moghanjoughi, M.

    2014-05-15

    The quantum magnetohydrodynamic model is employed in this paper to study the extraordinary (XO) elliptically polarized electromagnetic wave dispersion in quantum plasmas with spin-1/2 magnetization and relativistic degeneracy effects, considering also the electron-exchange and quantum diffraction of electrons. From the lower and upper calculated XO-modes, it is observed that, for electrons on the surface of the Fermi-sphere, the lower XO-mode can excite the Cherenkov radiation by crossing the Fermi-line, with some proper conditions depending on the values of independent plasma parameters, such as the relativistic-degeneracy, the atomic-number of constituent ions, and the magnetic field strength. Particularly, a lower electron number-density and Cherenkov radiation frequency limits are found to exist, for instance, for given values of the plasma ions atomic-number and the magnetic field strength below which the radiation can not be excited by the electrons on the Fermi-surface. This lower density limit increases by decrease in the atomic-number but decreases with decrease in the strength of the ambient magnetic field. It is remarkable that in this research it is discovered that the maximal Cherenkov-radiation per unit-length (the energy radiated by superluminal electrons traveling through the dielectric medium) coincides with the plasma number-densities, which is present in compact stars with the maximal radiation frequency lying in the gamma-ray spectrum. Current study can provide an important plasma diagnostic tool for a wide plasma density range, be it the solid density, the warm dense matter, the inertial confined or the astrophysical compact plasmas and may reveal an important cooling mechanism for white dwarfs. Current findings may also answer the fundamental astrophysical question on the mysterious origin of intense cosmic gamma-ray emissions.

  13. Anomalous Fermi-Surface Dependent Pairing in a Self-Doped High...

    Office of Scientific and Technical Information (OSTI)

    Subject: 36 MATERIALS SCIENCE; FERMI LEVEL; HIGH-TC SUPERCONDUCTORS; VALENCE; BARIUM OXIDES; CALCIUM OXIDES; COPPER OXIDES; BARIUM FLUORIDES; CALCIUM FLUORIDES; COPPER FLUORIDES; ...

  14. Fermi National Accelerator Laboratory | U.S. DOE Office of Science...

    Office of Science (SC) Website

    LP Home About Laboratory Appraisal Process FY 2015 Report Cards FY 2014 Report Cards FY ... FY 2015 SC Laboratory Performance Report Cards Fermi National Accelerator Laboratory Print ...

  15. Fermi National Accelerator Laboratory | U.S. DOE Office of Science...

    Office of Science (SC) Website

    Fermi National Accelerator Laboratory Laboratory Policy (LP) LP Home About Laboratory Appraisal Process FY 2015 Report Cards FY 2014 Report Cards FY 2013 Report Cards Report Card ...

  16. Fermi-LAT Observation of Supernova Remnant S147 (Journal Article...

    Office of Scientific and Technical Information (OSTI)

    Fermi-LAT Observation of Supernova Remnant S147 Citation Details In-Document Search Title: ... Subject: 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 71 CLASSICAL AND QUANTUM ...

  17. "Doing business with Argonne and Fermi national labs" - Aug. 21, 2013 |

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

    Argonne National Laboratory "Doing business with Argonne and Fermi national labs" - Aug. 21, 2013 Share Topic Operations Procurement Technology transfer

  18. Dependence of Kambersky damping on Fermi level and spin orientation

    SciTech Connect (OSTI)

    Qu, T.; Victora, R. H.

    2014-05-07

    Kambersky damping represents the loss of magnetic energy from the electrons to the lattice through the spin orbit interaction. It is demonstrated that, for bcc Fe-based transition metal alloys, the logarithm of the energy loss is proportional to the density of states at the Fermi level. Both inter and intraband damping are calculated for spins at arbitrary angle to the previously examined [001] direction. Although the easy axis 〈100〉 shows isotropic relaxation and achieves the minimum damping value of 0.002, other directions, such as 〈110〉, show substantial anisotropic damping.

  19. Detroit Edison's Fermi 1 - Preparation for Reactor Removal

    SciTech Connect (OSTI)

    Swindle, Danny [Sargent and Lundy Engineers, LLC, 55 E. Monroe Street, Chicago, IL 60603 (United States)

    2008-01-15

    This paper is intended to provide information about the ongoing decommissioning tasks at Detroit Edison's Fermi 1 plant, and in particular, the work being performed to prepare the reactor for removal and disposal. In 1972 Fermi 1 was shutdown and the fuel returned to the Atomic Energy Commission. By the end of 1975, a retirement plan was prepared, the bulk sodium removed, and the plant placed in a safe store condition. The plant systems were left isolated with the sodium containing systems inert with carbon dioxide in an attempt to form a carbonate layer, thus passivating the underlying reactive sodium. In 1996, Detroit Edison determined to evaluate the condition of the plant and to make recommendations in relation to the Fermi 1 future plans. At the end of 1997 approval was obtained to remove the bulk asbestos and residual alkali-metals (i.e., sodium and sodium potassium (NaK)). In 2000, full nuclear decommissioning of the plant was approved. To date, the bulk asbestos insulation has been removed, and the only NaK remaining is located in six capillary instrument tubes. The remaining sodium is contained within the reactor, two of the three primary loops, and miscellaneous removed pipes and equipment to be processed. The preferred method for removing or reacting sodium at Fermi 1 is by injecting superheated steam into a heated, nitrogen inert system. The byproducts of this reaction are caustic sodium hydroxide, hydrogen gas, and heat. The decision was made to separate the three primary loops from the reactor for better control prior to processing each loop and the reactor separately. The first loop has already been processed. The main focus is now to process the reactor to allow removal and disposal of the Class C waste prior to the anticipated June 2008 closure of the Barnwell radioactive waste disposal facility located in South Carolina. Lessons learnt are summarized and concern: the realistic schedule and adherence to the schedule, time estimates, personnel accountability, back up or fill in work, work packages, condensation control, radiological contamination control, and organization of the waste stream.

  20. U.S. Department of Energy Fermi National Accelerator Laboratory

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy's (DOE's) Fermi National Accelerator Laboratory (Fermilab) has replaced old equipment and reduced energy consumption through a partnership with its electric utility, Commonwealth Edison. Fermilab upgraded the centralized cooling system and separated the system into two segments — a "comfort system" to cool the employee office space and a "process system" for the equipment and accelerators. Backup cooling capacity is provided and cooling can be shifted between the process and comfort systems when necessary. The new 4500-ton cooling system is expected to use 40% less energy and is free of ozone-depleting chlorofluorocarbons (CFCs).

  1. Dark matter annihilation and the PAMELA, FERMI, and ATIC anomalies

    SciTech Connect (OSTI)

    El Zant, A. A.; Okada, H.; Khalil, S.

    2010-06-15

    If dark matter annihilation accounts for the tantalizing excess of cosmic ray electron/positrons, as reported by the PAMELA, ATIC, HESS, and FERMI observatories, then the implied annihilation cross section must be relatively large. This results, in the context of standard cosmological models, in very small relic dark matter abundances that are incompatible with astrophysical observations. We explore possible resolutions to this apparent conflict in terms of nonstandard cosmological scenarios; plausibly allowing for large cross sections, while maintaining relic abundances in accord with current observations.

  2. Implication of Tsallis entropy in the ThomasFermi model for self-gravitating fermions

    SciTech Connect (OSTI)

    Ourabah, Kamel; Tribeche, Mouloud

    2014-03-15

    The ThomasFermi approach for self-gravitating fermions is revisited within the theoretical framework of the q-statistics. Starting from the q-deformation of the FermiDirac distribution function, a generalized ThomasFermi equation is derived. It is shown that the Tsallis entropy preserves a scaling property of this equation. The q-statistical approach to Jeans instability in a system of self-gravitating fermions is also addressed. The dependence of the Jeans wavenumber (or the Jeans length) on the parameter q is traced. It is found that the q-statistics makes the Fermionic system unstable at scales shorter than the standard Jeans length. -- Highlights: ThomasFermi approach for self-gravitating fermions. A generalized ThomasFermi equation is derived. Nonextensivity preserves a scaling property of this equation. Nonextensive approach to Jeans instability of self-gravitating fermions. It is found that nonextensivity makes the Fermionic system unstable at shorter scales.

  3. Environmental Survey preliminary report, Fermi National Accelerator Laboratory, Batavia, Illinois

    SciTech Connect (OSTI)

    Not Available

    1988-10-01

    This report presents the preliminary findings from the first phase of the Environmental Survey of the US Department of Energy (DOE) Fermi National Accelerator Laboratory (Fermilab), conducted September 14 through 25, 1987. The Survey is being conducted by an interdisciplinary team of environmental specialists led and managed by the Office of Environment, Safety and Health's Office of Environmental Audit. Individual participants for the Survey team are being supplied by a private contractor. The objective of the Survey is to identify environmental problems and areas of environmental risk associated with Fermilab. The Survey covers all environmental media and all areas of environmental regulation. It is being performed in accordance with the DOE Environmental Survey Manual. This phase of the Survey involves the review of existing site environmental data, observations of the operations performed at Fermilab, and interviews with site personnel. 110 refs., 26 figs., 41 tabs.

  4. SLAC All Access: Fermi Gamma-ray Space Telescope

    ScienceCinema (OSTI)

    Romani, Roger

    2014-06-24

    Three hundred and fifty miles overhead, the Fermi Gamma-ray Space Telescope silently glides through space. From this serene vantage point, the satellite's instruments watch the fiercest processes in the universe unfold. Pulsars spin up to 700 times a second, sweeping powerful beams of gamma-ray light through the cosmos. The hyperactive cores of distant galaxies spew bright jets of plasma. Far beyond, something mysterious explodes with unfathomable power, sending energy waves crashing through the universe. Stanford professor and KIPAC member Roger W. Romani talks about this orbiting telescope, the most advanced ever to view the sky in gamma rays, a form of light at the highest end of the energy spectrum that's created in the hottest regions of the universe.

  5. Award Laureates | U.S. DOE Office of Science (SC)

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

    Award Laureates The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us Award Laureates Print Text Size: A A A FeedbackShare Page 2010's Laureates 2000's Laureates 1990's Laureates 2010 Mildred S.

  6. Anomalous Fermi-Surface Dependent Pairing in a Self-Doped

    Office of Scientific and Technical Information (OSTI)

    High-TcSuperconductor (Journal Article) | SciTech Connect Anomalous Fermi-Surface Dependent Pairing in a Self-Doped High-TcSuperconductor Citation Details In-Document Search Title: Anomalous Fermi-Surface Dependent Pairing in a Self-Doped High-TcSuperconductor We report the discovery of a self-doped multilayer high Tcsuperconductor Ba2Ca3Cu4O8F2 (F0234) which contains distinctly differentsuperconducting gap magnitudes along its two Fermi-surface sheets. Whileformal valence counting would

  7. Odd-frequency density waves: Non-Fermi-liquid metals with an order

    Office of Scientific and Technical Information (OSTI)

    parameter (Journal Article) | SciTech Connect Odd-frequency density waves: Non-Fermi-liquid metals with an order parameter Citation Details In-Document Search Title: Odd-frequency density waves: Non-Fermi-liquid metals with an order parameter We consider states with a charge- or spin-density wave order parameter which is odd in frequency so that the order parameter vanishes at zero frequency and there is a conventional Fermi surface. Such states break translational symmetry and, therefore,

  8. THE FERMI GBM GAMMA-RAY BURST CATALOG: THE FIRST TWO YEARS

    SciTech Connect (OSTI)

    Paciesas, William S.; Bhat, P. N.; Briggs, Michael S.; Burgess, J. Michael; Chaplin, Vandiver; Connaughton, Valerie; Goldstein, Adam; Guiriec, Sylvain; Meegan, Charles A.; Van der Horst, Alexander J.; Von Kienlin, Andreas; Diehl, Roland; Foley, Suzanne; Greiner, Jochen; Gruber, David; Bissaldi, Elisabetta; Fishman, Gerald J.; Gibby, Melissa; Giles, Misty; and others

    2012-03-01

    The Fermi Gamma-ray Burst Monitor (GBM) is designed to enhance the scientific return from Fermi in studying gamma-ray bursts (GRBs). In its first two years of operation GBM triggered on 491 GRBs. We summarize the criteria used for triggering and quantify the general characteristics of the triggered GRBs, including their locations, durations, peak flux, and fluence. This catalog is an official product of the Fermi GBM science team, and the data files containing the complete results are available from the High-Energy Astrophysics Science Archive Research Center.

  9. Fermi-LAT Detection of a Break in the Gamma-Ray Spectrum of the...

    Office of Scientific and Technical Information (OSTI)

    in the Gamma-Ray Spectrum of the Supernova Remnant Cassiopeia A Citation Details In-Document Search Title: Fermi-LAT Detection of a Break in the Gamma-Ray Spectrum of the Supernova ...

  10. Fermi-LAT Observation of Supernova Remnant S147 (Journal Article...

    Office of Scientific and Technical Information (OSTI)

    We present an analysis of gamma-ray data obtained with the Large Area Telescope (LAT) onboard the Fermi Gamma-ray Space Telescope in the region around SNR S147 (G180.0-1.7). A ...

  11. Formation of Gapless Fermi Arcs and Fingerprints of Order in the Pseudogap State of Cuprate Superconductors

    SciTech Connect (OSTI)

    Kondo, Takeshi; Palczewski, Ari; Hamaya, Yoichiro; Takeuchi, Tsunehiro; Wen, J. S.; Xu, Z. J.; Gu, Genda; Kaminski, Adam

    2013-10-08

    We use angle-resolved photoemission spectroscopy and a new quantitative approach based on the partial density of states to study properties of seemingly disconnected portions of the Fermi surface (FS) that are present in the pseudogap state of cuprates called Fermi arcs. We find that the normal state FS collapses very abruptly into Fermi arcs at the pseudogap temperature (T*). Surprisingly, the length of the Fermi arcs remains constant over an extended temperature range between (T*) and Tpair, consistent with the presence of an ordered state below T*. These arcs collapse again at the temperature below which pair formation occurs (Tpair) either to a point or a very short arc, whose length is limited by our experimental resolution. The tips of the arcs span between points defining a set of wave vectors in momentum space, which are the fingerprints of the ordered state that causes the pseudogap.

  12. Formation of Gapless Fermi Arcs and Fingerprints of Order in the Pseudogap State of Cuprate Superconductors

    SciTech Connect (OSTI)

    Kondo, Takeshi; Palczewski, Ari D.; Hamaya, Yoichiro; Takeuchi, Tsunehiro; Wen, J. S.; Gu, Genda; Kaminski, Adam

    2013-10-11

    We use angle-resolved photoemission spectroscopy and a new quantitative approach based on the partial density of states to study properties of seemingly disconnected portions of the Fermi surface (FS) that are present in the pseudogap state of cuprates called Fermi arcs. We find that the normal state FS collapses very abruptly into Fermi arcs at the pseudogap temperature (T?). Surprisingly, the length of the Fermi arcs remains constant over an extended temperature range between T? and Tpair, consistent with the presence of an ordered state below T?. These arcs collapse again at the temperature below which pair formation occurs (Tpair) either to a point or a very short arc, whose length is limited by our experimental resolution. The tips of the arcs span between points defining a set of wave vectors in momentum space, which are the fingerprints of the ordered state that causes the pseudogap.

  13. Pulsed Gamma-Rays From PSR J2021 3651 with the Fermi Large Area...

    Office of Scientific and Technical Information (OSTI)

    Pulsed Gamma-Rays From PSR J2021 3651 with the Fermi Large Area Telescope Citation Details ... Language: English Subject: 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 72 PHYSICS ...

  14. Estimating the energy of stitching together the Maxwell and Fermi neutron spectra

    SciTech Connect (OSTI)

    Ionov, V. S. Marin, S. V.

    2014-12-15

    The energy of stitching together the Maxwell and Fermi spectra is estimated on the basis of experimental data and the results of calculations carried out using the MCU-RFFI and MCU-5 codes.

  15. Fermi Large Area Telescope Observation of a Gamma-Ray Source...

    Office of Scientific and Technical Information (OSTI)

    at the Position of Eta Carinae Citation Details In-Document Search Title: Fermi Large Area Telescope Observation of a Gamma-Ray Source at the Position of Eta Carinae Authors: ...

  16. Fermi Large Area Telescope Observation of a Gamma-Ray Source...

    Office of Scientific and Technical Information (OSTI)

    at the Position of Eta Carinae Citation Details In-Document Search Title: Fermi Large Area Telescope Observation of a Gamma-Ray Source at the Position of Eta Carinae You are ...

  17. Towards a supersymmetric description of the Fermi Galactic center excess

    SciTech Connect (OSTI)

    Cahill-Rowley, M.; Gainer, J. S.; Hewett, J. L.; Rizzo, T. G.

    2015-02-10

    We attempt to build a model that describes the Fermi galactic gamma-ray excess (FGCE) within a UV-complete Supersymmetric framework; we find this to be highly non-trivial. At the very least a successful Supersymmetric explanation must have several important ingredients in order to fit the data and satisfy other theoretical and experimental constraints. Under the assumption that a single annihilation mediator is responsible for both the observed relic density as well as the FGCE, we show that the requirements are not easily satisfied in many TeV-scale SUSY models, but can be met with some model building effort in the general NMSSM with ~ 10 parameters beyond the MSSM. We find that the data selects a particular region of the parameter space with a mostly singlino lightest Supersymmetric particle and a relatively light CP-odd Higgs boson that acts as the mediator for dark matter annihilation. We study the predictions for various observables within this parameter space, and find that searches for this light CP-odd state at the LHC, as well as searches for the direct detection of dark matter, are likely to be quite challenging. It is possible that a signature could be observed in the flavor sector; however, indirect detection remains the best probe of this scenario.

  18. Towards a supersymmetric description of the Fermi Galactic center excess

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

    Cahill-Rowley, M.; Gainer, J. S.; Hewett, J. L.; Rizzo, T. G.

    2015-02-10

    We attempt to build a model that describes the Fermi galactic gamma-ray excess (FGCE) within a UV-complete Supersymmetric framework; we find this to be highly non-trivial. At the very least a successful Supersymmetric explanation must have several important ingredients in order to fit the data and satisfy other theoretical and experimental constraints. Under the assumption that a single annihilation mediator is responsible for both the observed relic density as well as the FGCE, we show that the requirements are not easily satisfied in many TeV-scale SUSY models, but can be met with some model building effort in the general NMSSMmore » with ~ 10 parameters beyond the MSSM. We find that the data selects a particular region of the parameter space with a mostly singlino lightest Supersymmetric particle and a relatively light CP-odd Higgs boson that acts as the mediator for dark matter annihilation. We study the predictions for various observables within this parameter space, and find that searches for this light CP-odd state at the LHC, as well as searches for the direct detection of dark matter, are likely to be quite challenging. It is possible that a signature could be observed in the flavor sector; however, indirect detection remains the best probe of this scenario.« less

  19. Fermi-liquid damping and NMR relaxation in superconductors

    SciTech Connect (OSTI)

    Tewari, S.; Ruvalds, J.

    1996-03-01

    Electron collisions for a two-dimensional Fermi-liquid (FL) are shown to give a quasiparticle damping with interesting frequency and temperature variations in the BCS superconducting state. The spin susceptibility which determines the structure of the damping is analyzed in the normal state for a Hubbard model with a constant on-site Coulomb repulsion. This is then generalized to the superconducting state by including coherence factors and self-energy and vertex corrections. Calculations of the NMR relaxation rate reveal that the FL damping structure can reduce the Hebel-Slichter peak, in agreement with data on the organic superconductor (MDT-TTF){sub 2}AuI{sub 2} (methylenedithiotetrathiafulvalene salt). However, the strongly suppressed FL damping in the superconducting state does not eliminate the Hebel-Slichter peak, and thus suggests that other mechanisms are needed to explain the NMR data on (TMTSF){sub 2}ClO{sub 4} (bistetramethyltetraselenafulvaleneperchlorate), the BEDT organic compounds, and cuprate superconductors. Predictions of the temperature variation of the damping and the spin response are given over a wide frequency range as a guide to experimental probes of the symmetry of the superconducting pairs. {copyright} {ital 1996 The American Physical Society.}

  20. Experiences with string matching on the Fermi Architecture

    SciTech Connect (OSTI)

    Tumeo, Antonino; Secchi, Simone; Villa, Oreste

    2011-02-25

    String matching is at the core of many real-world applications, such as security, bioinformatic, data mining. All these applications requires the ability to match always growing data sets against large dictionaries effectively, fastly and possibly in real time. Unfortunately, string matching is a computationally intensive procedure which poses significant challenges on current software and hardware implementations. Graphic Processing Units (GPU) have become an interesting target for such high-throughput applications, but the algorithms and the data structures need to be redesigned to be parallelized and adapted to the underlining hardware, coping with the limitations imposed by these architectures. In this paper we present an efficient implementation of the Aho-Corasick string matching algorithm on GPU, showing how we progressively redesigned the algorithm and the data structures to fit on the architecture. We then evaluate the implementation on single and multiple Tesla C2050 (T20 ``Fermi'' based) boards, comparing them to the previous Tesla C1060 (T10 based) solutions and equivalent multicore implementations on x86 CPUs. We discuss the various tradeoffs of the different architectures.

  1. Fermi 2: Independent safety assessment of refueling outage

    SciTech Connect (OSTI)

    Arora, H.O. [Detroit Edison, MI (United States)

    1994-12-31

    Industry experience and studies conducted by the U.S. Nuclear Regulatory Commission (NRC) have shown that plants are susceptible to a variety of events that can challenge safety during shutdowns. While these events have neither posed nor indicated an undue risk to public health and safety, they do serve to underscore the importance of effective outage planning and control. The NUMARC 91-06 guidelines suggest that proper planning and execution of outage activities can reduce the likelihood and consequences of events, which ultimately enhances safety during shutdown. The Fermi 2, Independent Safety Engineering Group (ISEG) is charged with the independent safety review of the refueling outage plan and its implementation. The ISEG is responsible for performing a detailed and critical review of proposed outage plan prior to the start of the outage, maintaining surveillance of the adequacy and consistency of the {open_quotes}defense-in-depth{close_quotes} provided during the outage, reviewing the outage plan changes for potential vulnerabilities that could affect safety functions, and investigating selected events that emerge during the course of the outage.

  2. Fermi National Accelerator Laboratory FERMILAB-Conf-95/276-E

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

    Fermi National Accelerator Laboratory FERMILAB-Conf-95/276-E CDF and D0 Observation of the Top Quark S.B. Kim Presented for the CDF and D0 Collaborations Fermi National Accelerator Laboratory P.O. Box 500, Batavia, Illinois 60510 Randall Laboratory University of Michigan Ann Arbor, Michigan 48109 August 1995 Published Proceedings from the 15th International Conference on Physics in Collision, Cracow, Poland, June 8-10, 1995 Operated by Universities Research Association Inc. under Contract No.

  3. Fermi Energy Tuning with Light to Control Doping Profiles During Epitaxy;

    Office of Scientific and Technical Information (OSTI)

    Article No. 182105 (Journal Article) | SciTech Connect Fermi Energy Tuning with Light to Control Doping Profiles During Epitaxy; Article No. 182105 Citation Details In-Document Search Title: Fermi Energy Tuning with Light to Control Doping Profiles During Epitaxy; Article No. 182105 Authors: Sanders, Charlotte E. ; Beaton, Daniel A. ; Reedy, Robert C. ; Alberi, Kristin Publication Date: 2015-05-04 OSTI Identifier: 1220719 Report Number(s): NREL/JA-5K00-64047 Resource Type: Journal Article

  4. Iltt: Fermi National Accelerator Laboratory FERMILAB-Pub-75/44-THY

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

    Iltt: Fermi National Accelerator Laboratory FERMILAB-Pub-75/44-THY June 1975 Weak Interaction Models with New Quarks and Right-Handed Currents" F.A. WILCZEK and A. ZEE t Fermi National Accelerator Laboratory,*Batavia, Illinois 60510 and Joseph Henry Laboratories Princeton University, Princeton, New Jersey 08540 and R. L. KINGSLEY and S. B. TREIMAN Joseph Henry Laboratories Princeton University, Princeton, New Jersey 08540 ABSTRACT We discuss various weak interaction issues for a general

  5. Kondo effect and non-Fermi-liquid behavior in Dirac and Weyl semimetals

    Office of Scientific and Technical Information (OSTI)

    (Journal Article) | SciTech Connect Kondo effect and non-Fermi-liquid behavior in Dirac and Weyl semimetals Citation Details In-Document Search This content will become publicly available on July 7, 2016 Title: Kondo effect and non-Fermi-liquid behavior in Dirac and Weyl semimetals Authors: Principi, Alessandro ; Vignale, Giovanni ; Rossi, E. Publication Date: 2015-07-08 OSTI Identifier: 1198627 Grant/Contract Number: FG02-05ER46203 Type: Publisher's Accepted Manuscript Journal Name:

  6. The Search of Axion-Like-Particles With Fermi and Cherenkov Telescopes

    Office of Scientific and Technical Information (OSTI)

    (Conference) | SciTech Connect SciTech Connect Search Results Conference: The Search of Axion-Like-Particles With Fermi and Cherenkov Telescopes Citation Details In-Document Search Title: The Search of Axion-Like-Particles With Fermi and Cherenkov Telescopes Authors: Sanchez-Conde, Miguel A. ; /IAC, La Laguna ; Paneque, David ; /KIPAC, Menlo Park /SLAC ; Bloom, Elliott D. ; /KIPAC, Menlo Park /SLAC ; Prada, Francisco ; /IAA, Granada ; Dominguez, Alberto ; /CNA, Seville /IAA, Granada

  7. A Method to Analyze the Diffuse Gamma-Ray Emission with the Fermi Large

    Office of Scientific and Technical Information (OSTI)

    Area Telescope (Journal Article) | SciTech Connect A Method to Analyze the Diffuse Gamma-Ray Emission with the Fermi Large Area Telescope Citation Details In-Document Search Title: A Method to Analyze the Diffuse Gamma-Ray Emission with the Fermi Large Area Telescope Authors: Ackermann, Markus ; /KIPAC, Menlo Park /SLAC ; Johannesson, Gudlaugur ; /KIPAC, Menlo Park /SLAC ; Digel, Seth ; /KIPAC, Menlo Park /SLAC ; Moskalenko, Igor V. ; /KIPAC, Menlo Park /SLAC ; Porter, Troy ; /UC, Santa Cruz

  8. Kondo effect and non-Fermi-liquid behavior in Dirac and Weyl semimetals

    Office of Scientific and Technical Information (OSTI)

    (Journal Article) | DOE PAGES Publisher's Accepted Manuscript: Kondo effect and non-Fermi-liquid behavior in Dirac and Weyl semimetals This content will become publicly available on July 7, 2016 Title: Kondo effect and non-Fermi-liquid behavior in Dirac and Weyl semimetals Authors: Principi, Alessandro ; Vignale, Giovanni ; Rossi, E. Publication Date: 2015-07-08 OSTI Identifier: 1198627 Grant/Contract Number: FG02-05ER46203 Type: Publisher's Accepted Manuscript Journal Name: Physical Review

  9. Dual vortex theory of strongly interacting electrons: A non-Fermi liquid

    Office of Scientific and Technical Information (OSTI)

    with a twist (Journal Article) | SciTech Connect Dual vortex theory of strongly interacting electrons: A non-Fermi liquid with a twist Citation Details In-Document Search Title: Dual vortex theory of strongly interacting electrons: A non-Fermi liquid with a twist As discovered in the quantum Hall effect, a very effective way for strongly repulsive electrons to minimize their potential energy is to aquire nonzero relative angular momentum. We pursue this mechanism for interacting

  10. Towards a Holographic Marginal Fermi Liquid (Journal Article) | SciTech

    Office of Scientific and Technical Information (OSTI)

    Connect Towards a Holographic Marginal Fermi Liquid Citation Details In-Document Search Title: Towards a Holographic Marginal Fermi Liquid We present an infinite class of 2+1 dimensional field theories which, after coupling to semi-holographic fermions, exhibit strange metallic behavior in a suitable large N limit. These theories describe lattices of hypermultiplet defects interacting with parity-preserving supersymmetric Chern-Simons theories with U(N) x U(N) gauge groups at levels {+-}k.

  11. Towards a holographic marginal Fermi liquid (Journal Article) | SciTech

    Office of Scientific and Technical Information (OSTI)

    Connect Towards a holographic marginal Fermi liquid Citation Details In-Document Search Title: Towards a holographic marginal Fermi liquid Authors: Jensen, Kristan ; Kachru, Shamit ; Karch, Andreas ; Polchinski, Joseph ; Silverstein, Eva Publication Date: 2011-12-02 OSTI Identifier: 1098349 Type: Publisher's Accepted Manuscript Journal Name: Physical Review D Additional Journal Information: Journal Volume: 84; Journal Issue: 12; Journal ID: ISSN 1550-7998 Publisher: American Physical Society

  12. Van der Waals Metal-Semiconductor Junction: Weak Fermi Level Pinning

    Office of Scientific and Technical Information (OSTI)

    Enables Effective Tuning of Schottky Barrier (Journal Article) | SciTech Connect Van der Waals Metal-Semiconductor Junction: Weak Fermi Level Pinning Enables Effective Tuning of Schottky Barrier Citation Details In-Document Search This content will become publicly available on April 1, 2017 Title: Van der Waals Metal-Semiconductor Junction: Weak Fermi Level Pinning Enables Effective Tuning of Schottky Barrier Two-dimensional (2D) semiconductors have shown great potential for electronic and

  13. Modeling High-Energy Gamma-Rays from the Fermi Bubbles - Oral Presentation

    SciTech Connect (OSTI)

    Splettstoesser, Megan

    2015-08-25

    In 2010, the Fermi Bubbles were discovered at the galactic center of the Milky Way. These giant gamma-ray structures, extending 50 degrees in galactic latitude and 20-30 degrees in galactic longitude, were not predicted. We wish to develop a model for the gamma-ray emission of the Fermi Bubbles. To do so, we assume that second order Fermi acceleration is responsible for the high-energy emission of the bubbles. Second order Fermi acceleration requires charged particles and irregular magnetic fields—both of which are present in the disk of the Milky Way galaxy. I use the assumption of second order Fermi acceleration in the transport equation, which describes the diffusion of particles. By solving the steady-state case of the transport equation, I compute the proton spectrum due to Fermi second order acceleration and compare this analytical solution to a numerical solution provided by Dr. P. Mertsch. Analytical solutions to the transport equation are taken from Becker, Le, & Dermer and are used to further test the numerical solution. I find that the numerical solution converges to the analytical solution in all cases. Thus, we know the numerical solution accurately calculates the proton spectrum. The gamma-ray spectrum follows the proton spectrum, and will be computed in the future.

  14. Modeling high-energy gamma-rays from the Fermi Bubbles

    SciTech Connect (OSTI)

    Splettstoesser, Megan

    2015-09-17

    In 2010, the Fermi Bubbles were discovered at the galactic center of the Milky Way. These giant gamma-ray structures, extending 55° in galactic latitude and 20°-30° in galactic longitude, were not predicted. We wish to develop a model for the gamma-ray emission of the Fermi Bubbles. To do so, we assume that second order Fermi acceleration requires charged particles and irregular magnetic fields- both of which are present in the disk of the Milky Way galaxy. By solving the steady-state case of the transport equation, I compute the proton spectrum due to second order Fermi acceleration. I compare the analytical solutions of the proton spectrum to a numerical solution. I find that the numerical solution to the transport equation converges to the analytical solution in all cases. The gamma-ray spectrum due to proton-proton interaction is compared to Fermi Bubble data (from Ackermann et al. 2014), and I find that second order Fermi acceleration is a good fit for the gamma-ray spectrum of the Fermi Bubbles at low energies with an injection source term of S = 1.5 x 10⁻¹⁰ GeV⁻¹cm⁻³yr⁻¹. I find that a non-steady-state solution to the gamma-ray spectrum with an injection source term of S = 2 x 10⁻¹⁰ GeV⁻¹cm⁻³yr⁻¹ matches the bubble data at high energies.

  15. Relativistic equation of state at subnuclear densities in the Thomas-Fermi approximation

    SciTech Connect (OSTI)

    Zhang, Z. W.; Shen, H., E-mail: shennankai@gmail.com [School of Physics, Nankai University, Tianjin 300071 (China)

    2014-06-20

    We study the non-uniform nuclear matter using the self-consistent Thomas-Fermi approximation with a relativistic mean-field model. The non-uniform matter is assumed to be composed of a lattice of heavy nuclei surrounded by dripped nucleons. At each temperature T, proton fraction Y{sub p} , and baryon mass density ? {sub B}, we determine the thermodynamically favored state by minimizing the free energy with respect to the radius of the Wigner-Seitz cell, while the nucleon distribution in the cell can be determined self-consistently in the Thomas-Fermi approximation. A detailed comparison is made between the present results and previous calculations in the Thomas-Fermi approximation with a parameterized nucleon distribution that has been adopted in the widely used Shen equation of state.

  16. Hunting for treasures among the Fermi unassociated sources: A multiwavelength approach

    SciTech Connect (OSTI)

    Acero, F.; Ojha, R.; Edwards, P. G.; Blanchard, J.; Lovell, J. E. J.; Thompson, D. J.

    2013-12-20

    The Fermi Gamma-Ray Space Telescope has been detecting a wealth of sources where the multiwavelength counterpart is either inconclusive or missing altogether. We present a combination of factors that can be used to identify multiwavelength counterparts to these Fermi unassociated sources. This approach was used to select and investigate seven bright, high-latitude unassociated sources with radio, UV, X-ray, and ?-ray observations. As a result, four of these sources are candidates to be active galactic nuclei, and one to be a pulsar, while two do not fit easily into these known categories of sources. The latter pair of extraordinary sources might reveal a new category subclass or a new type of ?-ray emitter. These results altogether demonstrate the power of a multiwavelength approach to illuminate the nature of unassociated Fermi sources.

  17. Extending the Fermi-LAT data processing pipeline to the grid

    SciTech Connect (OSTI)

    Zimmer, S.; Arrabito, L.; Glanzman, T.; Johnson, T.; Lavalley, C.; Tsaregorodtsev, A.

    2015-05-12

    The Data Handling Pipeline ("Pipeline") has been developed for the Fermi Gamma-Ray Space Telescope (Fermi) Large Area Telescope (LAT) which launched in June 2008. Since then it has been in use to completely automate the production of data quality monitoring quantities, reconstruction and routine analysis of all data received from the satellite and to deliver science products to the collaboration and the Fermi Science Support Center. Aside from the reconstruction of raw data from the satellite (Level 1), data reprocessing and various event-level analyses are also reasonably heavy loads on the pipeline and computing resources. These other loads, unlike Level 1, can run continuously for weeks or months at a time. Additionally, it receives heavy use in performing production Monte Carlo tasks.

  18. Energy Secretary Moniz to Present Enrico Fermi Awards | Department...

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

    Allen J. Bard, Director, Center for Electrochemistry and Hackerman-Welch Regents Chair in Chemistry at The University of Texas at Austin, and Dr. Andrew Sessler, Distinguished ...

  19. Secretary Moniz's Remarks at the 2013 Enrico Fermi Awards Ceremony...

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

    more recently from both institutions - Art Rosenfeld, for example, from Berkeley, the ... And he credits the time he spent as a child at the American Museum of Natural History and ...

  20. DOE Science Showcase - 2009 Enrico Fermi Award Winners | OSTI...

    Office of Scientific and Technical Information (OSTI)

    Goodenough's Research DOE R&D Accomplishments John B. Goodenough, Cathode Materials, and Rechargeable Lithium-ion Batteries Information Bridge Basic Research Needs for Electrical ...

  1. Fermi National Accelerator Laboratory FERMILAB-Conf-96/099E

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

    it Fermi National Accelerator Laboratory FERMILAB-Conf-96/099E CoK)C,. WoO3P73 -- 3 CDF CDF Top Physics G. F. Tartarelli For the CDF Collaboration Fermi National Accelerator Laboratory P.O. Box 500, Batavia, Illinois 60510 I.N.F.N., Sezione di Milano 1-20133 Milano (MI), Italy MASTER May 1996 Proceedings of XXXIst Recontres de Moriond, Electroweak Interactions and Unified Theories, Les Arcs, France, March 16-23, 1996. Operated by Universities Research Association Inc. under Contract No.

  2. Fermi surface topology and hot spot distribution in the Kondo lattice

    Office of Scientific and Technical Information (OSTI)

    system CeB 6 (Journal Article) | SciTech Connect Fermi surface topology and hot spot distribution in the Kondo lattice system CeB 6 Citation Details In-Document Search This content will become publicly available on September 17, 2016 Title: Fermi surface topology and hot spot distribution in the Kondo lattice system CeB 6 Authors: Neupane, Madhab ; Alidoust, Nasser ; Belopolski, Ilya ; Bian, Guang ; Xu, Su-Yang ; Kim, Dae-Jeong ; Shibayev, Pavel P. ; Sanchez, Daniel S. ; Zheng, Hao ; Chang,

  3. Fermi-LAT Detection of a Break in the Gamma-Ray Spectrum of the Supernova

    Office of Scientific and Technical Information (OSTI)

    Remnant Cassiopeia A (Journal Article) | SciTech Connect Fermi-LAT Detection of a Break in the Gamma-Ray Spectrum of the Supernova Remnant Cassiopeia A Citation Details In-Document Search Title: Fermi-LAT Detection of a Break in the Gamma-Ray Spectrum of the Supernova Remnant Cassiopeia A Authors: Yuan, Y. ; Funk, S. ; Johannesson, G. ; Lande, J. ; Tibaldo, L. ; Uchiyama, Y. ; /Stanford U., HEPL /KIPAC, Menlo Park /SLAC /Iceland U. ; , Publication Date: 2013-11-07 OSTI Identifier: 1104713

  4. Flux and Photon Spectral Index Distributions of Fermi-LAT Blazars and

    Office of Scientific and Technical Information (OSTI)

    Contribution to the Extragalactic Gamma-ray Background (Journal Article) | SciTech Connect Flux and Photon Spectral Index Distributions of Fermi-LAT Blazars and Contribution to the Extragalactic Gamma-ray Background Citation Details In-Document Search Title: Flux and Photon Spectral Index Distributions of Fermi-LAT Blazars and Contribution to the Extragalactic Gamma-ray Background We present a determination of the distributions of gamma-ray flux - the so called LogN-LogS relation - and

  5. Measurement of the Positive Muon Lifetime and Determination of the Fermi

    Office of Scientific and Technical Information (OSTI)

    Constant to Part-per-Million Precision (Journal Article) | SciTech Connect Measurement of the Positive Muon Lifetime and Determination of the Fermi Constant to Part-per-Million Precision Citation Details In-Document Search Title: Measurement of the Positive Muon Lifetime and Determination of the Fermi Constant to Part-per-Million Precision We report a measurement of the positive muon lifetime to a precision of 1.0 ppm; it is the most precise particle lifetime ever measured. The experiment

  6. Spin Polarization and Texture of the Fermi Arcs in the Weyl Fermion

    Office of Scientific and Technical Information (OSTI)

    Semimetal TaAs (Journal Article) | SciTech Connect Spin Polarization and Texture of the Fermi Arcs in the Weyl Fermion Semimetal TaAs Citation Details In-Document Search This content will become publicly available on March 1, 2017 Title: Spin Polarization and Texture of the Fermi Arcs in the Weyl Fermion Semimetal TaAs Authors: Xu, Su-Yang ; Belopolski, Ilya ; Sanchez, Daniel S. ; Neupane, Madhab ; Chang, Guoqing ; Yaji, Koichiro ; Yuan, Zhujun ; Zhang, Chenglong ; Kuroda, Kenta ; Bian,

  7. Neutron Physics. A Revision of I. Halpern's notes on E. Fermi's lectures in 1945

    DOE R&D Accomplishments [OSTI]

    Beckerley, J.G.

    1951-10-16

    In the Fall of 1945 a course in Neutron Physics was given by Professor Fermi as part of the program of the Los Alamos University. The course consisted of thirty lectures most of which were given by Fermi. In his absence R.F. Christy and E. Segre gave several lectures. The present revision is based upon class notes prepared by I. Halpern with some assistance by B.T. Feld and issued first as document LADC 255 and later with wider circulation as MDDC 320.

  8. Indirect searches for dark matter with the Fermi large area telescope

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

    Albert, Andrea

    2015-03-24

    There is overwhelming evidence that non-baryonic dark matter constitutes ~ 27% of the energy density of the Universe. Weakly Interacting Massive Particles (WIMPs) are promising dark matter candidates that may produce γ rays via annihilation or decay detectable by the Fermi Large Area Telescope (LAT). A detection of WIMPs would also indicate the existence of physics beyond the Standard Model. We present recent results from the two cleanest indirect WIMP searches by the Fermi-LAT Collaboration: searches for γ-ray spectral lines and γ-ray emission associated with Milky Way dwarf spheroidal satellite galaxies.

  9. Distribution of occupation numbers in finite Fermi systems and role of interaction in chaos and thermalization

    SciTech Connect (OSTI)

    Flambaum, V.V.; Izrailev, F.M. [School of Physics, University of New South Wales, Sydney 2052 (Australia)] [School of Physics, University of New South Wales, Sydney 2052 (Australia)

    1997-01-01

    A method is developed for calculation of single-particle occupation numbers in finite Fermi systems of interacting particles. It is more accurate than the canonical distribution method and gives the Fermi-Dirac distribution in the limit of large number of particles. It is shown that statistical effects of the interaction are absorbed by an increase of the effective temperature. Criteria for quantum chaos and statistical equilibrium are considered. All results are confirmed by numerical experiments in the two-body random interaction model. {copyright} {ital 1997} {ital The American Physical Society}

  10. Annealing, lattice disorder and non-Fermi liquid behavior in UCu4Pd

    SciTech Connect (OSTI)

    Booth, C.H.; Scheidt, E.-W.; Killer, U.; Weber, A.; Kehrein, S.

    2002-07-30

    The magnetic and electronic properties of non-Fermi liquid UCu{sub 4Pd} depend on annealing conditions. Local structural changes due to this annealing are reported from UL{sub III}- and Pd K-edge x-ray absorption fine-structure measurements. In particular, annealing decreases the fraction of Pd atoms on nominally Cu 16e sites and the U-Cu pair-distance distribution width. This study provides quantitative information on the amount of disorder in UCu{sub 4Pd} and allows an assessment of its possible importance to the observed non-Fermi liquid behavior.

  11. Indirect searches for dark matter with the Fermi large area telescope

    SciTech Connect (OSTI)

    Albert, Andrea

    2015-03-24

    There is overwhelming evidence that non-baryonic dark matter constitutes ~ 27% of the energy density of the Universe. Weakly Interacting Massive Particles (WIMPs) are promising dark matter candidates that may produce ? rays via annihilation or decay detectable by the Fermi Large Area Telescope (LAT). A detection of WIMPs would also indicate the existence of physics beyond the Standard Model. We present recent results from the two cleanest indirect WIMP searches by the Fermi-LAT Collaboration: searches for ?-ray spectral lines and ?-ray emission associated with Milky Way dwarf spheroidal satellite galaxies.

  12. Fermi surfaces and Phase Stability of Ba(Fe1-xMx))2As2 (M=Co...

    Office of Scientific and Technical Information (OSTI)

    Fermi surfaces and Phase Stability of Ba(Fe1-xMx))2As2 (MCo, Ni, Cu, Zn) Citation Details In-Document Search Title: Fermi surfaces and Phase Stability of Ba(Fe1-xMx))2As2 (MCo,...

  13. Fermi surfaces and phase stability of Ba(Fe1-xMx)2As2 (M = Co...

    Office of Scientific and Technical Information (OSTI)

    Fermi surfaces and phase stability of Ba(Fe1-xMx)2As2 (M Co,Ni,Cu,Zn) Citation Details In-Document Search Title: Fermi surfaces and phase stability of Ba(Fe1-xMx)2As2 (M ...

  14. U.S. Department of Energy Awards Contract for Management and Operation of

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

    Fermi National Accelerator Laboratory to the Fermi Research Alliance, LLC | U.S. DOE Office of Science (SC) U.S. Department of Energy Awards Contract for Management and Operation of Fermi National Accelerator Laboratory to the Fermi Research Alliance, LLC News News Home Featured Articles Science Headlines 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 Science Highlights Presentations & Testimony News Archives Communications and Public Affairs Contact Information Office of

  15. Role of fourth-order phase-space moments in collective modes of trapped Fermi gases

    SciTech Connect (OSTI)

    Chiacchiera, Silvia; Lepers, Thomas; Davesne, Dany; Urban, Michael

    2011-10-15

    We study the transition from hydrodynamic to collisionless behavior in collective modes of ultracold trapped Fermi gases. To that end, we solve the Boltzmann equation for the trapped Fermi gas via the moments method. We showed previously that it is necessary to go beyond second-order moments if one wants to reproduce the results of a numerical solution of the Boltzmann equation. Here, we will give the detailed description of the method including fourth-order moments. We apply this method to the case of realistic parameters, and compare the results for the radial quadrupole and scissors modes at unitarity to experimental data obtained by the Innsbruck group. It turns out that the inclusion of fourth-order moments clearly improves the agreement with the experimental data. In particular, the fourth-order moments reduce the effect of collisions and therefore partially compensate the effect of the enhanced in-medium cross section at low temperatures.

  16. Chiral asymmetry of the Fermi surface in dense relativistic matter in a magnetic field

    SciTech Connect (OSTI)

    Gorbar, E. V.; Miransky, V. A.; Shovkovy, I. A.

    2009-09-15

    It is revealed that in the normal phase of dense relativistic matter in a magnetic field, there exists a contribution to the axial current associated with a relative shift of the longitudinal momenta in the dispersion relations of opposite chirality fermions. Unlike the topological contribution in the axial current at the lowest Landau level, recently discussed in the literature, the dynamical one appears only in interacting matter and affects the fermions in all Landau levels, including those around the Fermi surface. The induced axial current and the shift of the Fermi surfaces of the left-handed and right-handed fermions are expected to play an important role in transport and emission properties of matter in various types of compact stars as well as in heavy ion collisions.

  17. Fermi large area telescope observations of blazar 3C 279 occultations by the sun

    SciTech Connect (OSTI)

    Barbiellini, G.; Bastieri, D.; Buson, S.; Bechtol, K.; Blandford, R. D.; Borgland, A. W.; Buehler, R.; Cameron, R. A.; Chiang, J.; Bellazzini, R.; Bregeon, J.; Bruel, P.; Caraveo, P. A.; Cavazzuti, E.; Ciprini, S.; Cecchi, C.; Chaves, R. C. G.; Cheung, C. C. E-mail: phdmitry@stanford.edu; and others

    2014-04-01

    Observations of occultations of bright ?-ray sources by the Sun may reveal predicted pair halos around blazars and/or new physics, such as, e.g., hypothetical light dark matter particlesaxions. We use Fermi Gamma-Ray Space Telescope (Fermi) data to analyze four occultations of blazar 3C 279 by the Sun on October 8 each year from 2008 to 2011. A combined analysis of the observations of these occultations allows a point-like source at the position of 3C 279 to be detected with significance of ?3?, but does not reveal any significant excess over the flux expected from the quiescent Sun. The likelihood ratio test rules out complete transparency of the Sun to the blazar ?-ray emission at a 3? confidence level.

  18. Constraints on decaying dark matter from Fermi observations of nearby galaxies and clusters

    SciTech Connect (OSTI)

    Dugger, Leanna; Profumo, Stefano [Department of Astronomy and Department of Physics, University of California Berkeley, 601 Campbell Hall, Berkeley, CA (United States); Jeltema, Tesla E., E-mail: greentee01@gmail.com, E-mail: tesla@ucolick.org, E-mail: profumo@scipp.ucsc.edu [UCO/Lick Observatories, 1156 High St., Santa Cruz, CA 95064 (United States)

    2010-12-01

    We analyze the impact of Fermi gamma-ray observations (primarily non-detections) of selected nearby galaxies, including dwarf spheroidals, and of clusters of galaxies on decaying dark matter models. We show that the fact that galaxy clusters do not shine in gamma rays puts the most stringent limits available to-date on the lifetime of dark matter particles for a wide range of particle masses and decay final states. In particular, our results put strong constraints on the possibility of ascribing to decaying dark matter both the increasing positron fraction reported by PAMELA and the high-energy feature in the electron-positron spectrum measured by Fermi. Observations of nearby dwarf galaxies and of the Andromeda Galaxy (M31) do not provide as strong limits as those from galaxy clusters, while still improving on previous constraints in some cases.

  19. Fermi Site Office EA / EIS | U.S. DOE Office of Science (SC)

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

    Fermi Site Office EA / EIS Safety and Security Policy (SSP) SSP Home About Frequently Used Resources NEPA Documents Categorical Exclusion Determinations Environmental Assessments and Environmental Impact Statements Continuity of Operations (COOP) Implementation Plan Contact Information Safety and Security Policy U.S. Department of Energy SC-31/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-6800 F: (301) 903-7047 More Information » Environmental Assessments (EA)

  20. Shot-noise at a Fermi-edge singularity: Non-Markovian dynamics

    SciTech Connect (OSTI)

    Ubbelohde, N.; Maire, N.; Haug, R. J.; Roszak, K.; Hohls, F.; Novotn, T.

    2013-12-04

    For an InAs quantum dot we study the current shot noise at a Fermi-edge singularity in low temperature cross-correlation measurements. In the regime of the interaction effect the strong suppression of noise observed at zero magnetic field and the sequence of enhancement and suppression in magnetic field go beyond a Markovian master equation model. Qualitative and quantitative agreement can however be achieved by a generalized master equation model taking non-Markovian dynamics into account.

  1. The Animated Gamma-ray Sky Revealed by the Fermi Gamma-ray Space Telescope

    ScienceCinema (OSTI)

    Isabelle Grenier

    2010-01-08

    The Fermi Gamma-ray Space Telescope has been observing the sky in gamma-rays since August 2008.  In addition to breakthrough capabilities in energy coverage (20 MeV-300 GeV) and angular resolution, the wide field of view of the Large Area Telescope enables observations of 20% of the sky at any instant, and of the whole sky every three hours. It has revealed a very animated sky with bright gamma-ray bursts flashing and vanishing in minutes, powerful active galactic nuclei flaring over hours and days, many pulsars twinkling in the Milky Way, and X-ray binaries shimmering along their orbit. Most of these variable sources had not been seen by the Fermi predecessor, EGRET, and the wealth of new data already brings important clues to the origin of the high-energy emission and particles powered by the compact objects. The telescope also brings crisp images of the bright gamma-ray emission produced by cosmic-ray interactions in the interstellar medium, thus allowing to measure the cosmic nuclei and electron spectra across the Galaxy, to weigh interstellar clouds, in particular in the dark-gas phase. The telescope sensitivity at high energy will soon provide useful constraints on dark-matter annihilations in a variety of environments. I will review the current results and future prospects of the Fermi mission.

  2. Poisson-Nernst-Planck-Fermi theory for modeling biological ion channels

    SciTech Connect (OSTI)

    Liu, Jinn-Liang; Eisenberg, Bob

    2014-12-14

    A Poisson-Nernst-Planck-Fermi (PNPF) theory is developed for studying ionic transport through biological ion channels. Our goal is to deal with the finite size of particle using a Fermi like distribution without calculating the forces between the particles, because they are both expensive and tricky to compute. We include the steric effect of ions and water molecules with nonuniform sizes and interstitial voids, the correlation effect of crowded ions with different valences, and the screening effect of water molecules in an inhomogeneous aqueous electrolyte. Including the finite volume of water and the voids between particles is an important new part of the theory presented here. Fermi like distributions of all particle species are derived from the volume exclusion of classical particles. Volume exclusion and the resulting saturation phenomena are especially important to describe the binding and permeation mechanisms of ions in a narrow channel pore. The Gibbs free energy of the Fermi distribution reduces to that of a Boltzmann distribution when these effects are not considered. The classical Gibbs entropy is extended to a new entropy form — called Gibbs-Fermi entropy — that describes mixing configurations of all finite size particles and voids in a thermodynamic system where microstates do not have equal probabilities. The PNPF model describes the dynamic flow of ions, water molecules, as well as voids with electric fields and protein charges. The model also provides a quantitative mean-field description of the charge/space competition mechanism of particles within the highly charged and crowded channel pore. The PNPF results are in good accord with experimental currents recorded in a 10{sup 8}-fold range of Ca{sup 2+} concentrations. The results illustrate the anomalous mole fraction effect, a signature of L-type calcium channels. Moreover, numerical results concerning water density, dielectric permittivity, void volume, and steric energy provide useful details to study a variety of physical mechanisms ranging from binding, to permeation, blocking, flexibility, and charge/space competition of the channel.

  3. Quantum fluctuations in the BCS-BEC crossover of two-dimensional Fermi gases

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

    He, Lianyi; Lu, Haifeng; Cao, Gaoqing; Hu, Hui; Liu, Xia -Ji

    2015-08-14

    We present a theoretical study of the ground state of the BCS-BEC crossover in dilute two-dimensional Fermi gases. While the mean-field theory provides a simple and analytical equation of state, the pressure is equal to that of a noninteracting Fermi gas in the entire BCS-BEC crossover, which is not consistent with the features of a weakly interacting Bose condensate in the BEC limit and a weakly interacting Fermi liquid in the BCS limit. The inadequacy of the two-dimensional mean-field theory indicates that the quantum fluctuations are much more pronounced than those in three dimensions. In this work, we show thatmore » the inclusion of the Gaussian quantum fluctuations naturally recovers the above features in both the BEC and the BCS limits. In the BEC limit, the missing logarithmic dependence on the boson chemical potential is recovered by the quantum fluctuations. Near the quantum phase transition from the vacuum to the BEC phase, we compare our equation of state with the known grand canonical equation of state of two-dimensional Bose gases and determine the ratio of the composite boson scattering length aB to the fermion scattering length a2D. We find aB ≃ 0.56a2D, in good agreement with the exact four-body calculation. As a result, we compare our equation of state in the BCS-BEC crossover with recent results from the quantum Monte Carlo simulations and the experimental measurements and find good agreements.« less

  4. 2009 Awards | U.S. DOE Office of Science (SC)

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

    09 Awards About About Home Organization Budget Field Offices Federal Advisory Committees History Scientific and Technical Information Honors & Awards Presidential Early Career Awards for Scientists and Engineers (PECASE) DOE's Winners Since 1996 2012 Ceremony 2014 Ceremony The Enrico Fermi Award The Ernest Orlando Lawrence Award DOE Nobel Laureates Federal Laboratory Consortium Excellence in Technology Transfer Awards R&D 100 Awards Jobs Brochures, Logos, & Information Resources

  5. The influence of pairing correlations on the isospin symmetry breaking corrections of superallowed Fermi beta decays

    SciTech Connect (OSTI)

    Cal Latin-Small-Letter-Dotless-I k, A. E.; Gerceklioglu, M.; Selam, C.

    2013-05-15

    Within the framework of quasi-particle random phase approximation, the isospin breaking correction of superallowed 0{sup +} {yields} 0{sup +} beta decay and unitarity of Cabibbo-Kobayashi-Maskawa mixing matrix have been investigated. The broken isotopic symmetry of nuclear part of Hamiltonian has been restored by Pyatov's method. The isospin symmetry breaking correction with pairing correlations has been compared with the previous results without pairing. The effect of pairing interactions has been examined for nine superallowed Fermi beta decays; their parent nuclei are {sup 26}Al, {sup 34}Cl, {sup 38}K, {sup 42}Sc, {sup 46}V, {sup 50}Mn, {sup 54}Co, {sup 62}Ga, {sup 74}Rb.

  6. Fermi Site Office CX Determinations | U.S. DOE Office of Science (SC)

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

    Additional, Hard Power-Law Component from 10 KeV to GeV Energies (Journal Article) | SciTech Connect Observations of GRB 090510: a Short Hard Gamma-Ray Burst with an Additional, Hard Power-Law Component from 10 KeV to GeV Energies Citation Details In-Document Search Title: Fermi Observations of GRB 090510: a Short Hard Gamma-Ray Burst with an Additional, Hard Power-Law Component from 10 KeV to GeV Energies Authors: Ackermann, M. ; /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys.

  7. Installation and commissioning of the new Fermi National Accelerator Laboratory H- Magnetron

    SciTech Connect (OSTI)

    Bollinger, D. S.

    2014-02-15

    The Fermi National Accelerator Laboratory (FNAL) 40 year old Cockcroft-Walton 750 keV injectors with slit aperture magnetron ion sources have been replaced with a circular aperture magnetron, Low Energy Beam Transport, Radio Frequency Quadrupole Accelerator, and Medium Energy Beam Transport, as part of the FNAL Proton Improvement Plan. The injector design is based on a similar system at Brookhaven National Laboratory. The installation, commissioning efforts, and source operations to date will be covered in this paper along with plans for additional changes to the original design to improve reliability by reducing extractor spark rates and arc current duty factor.

  8. Ferromagnetic Kondo lattice CeRuSi{sub 2} with non-Fermi-liquid behavior

    SciTech Connect (OSTI)

    Nikiforov, V. N.; Baran, M.; Irkhin, V. Yu.

    2013-05-15

    The structure, electronic, thermodynamic, and magnetic properties of the CeRuSi{sub 2} Kondo lattice with ferromagnetic ordering characterized by a small moment of the ground state are investigated. Anomalies in the temperature dependences of heat capacity and resistivity (unusual power or logarithmic behavior) observed in the low-temperature range indicate a non-Fermi-liquid behavior. The results are compared with those for other Ce{sub l}Ru{sub n}X{sub m} compounds and anomalous systems based on rare-earth elements and actinides that had been studied earlier.

  9. Disorder-Driven Non-Fermi-Liquid Behavior in Kondo Alloys

    SciTech Connect (OSTI)

    Miranda, E.; Dobrosavljevic, V.; Kotliar, G.

    1997-01-01

    We show how a model of disordered Anderson lattices can account for many non-Fermi-liquid features observed in some Kondo alloys. Because of the exponential nature of the Kondo temperature scale T{sub K}, even moderate disorder leads to a rather broad distribution of Kondo temperatures, inducing strong {ital effective} disorder seen by the conduction electrons. Spins with very low T{sub K}`s remain unquenched and dominate the low-temperature properties.This single underlying mechanism leads to logarithmic divergences in thermodynamic quantities and a linear temperature dependence of the resistivity. {copyright} {ital 1997} {ital The American Physical Society}

  10. Fermi Large Area Telescope Constraints on the Gamma-ray Opacity of the

    Office of Scientific and Technical Information (OSTI)

    Universe (Journal Article) | SciTech Connect Large Area Telescope Constraints on the Gamma-ray Opacity of the Universe Citation Details In-Document Search Title: Fermi Large Area Telescope Constraints on the Gamma-ray Opacity of the Universe Authors: Abdo, A.A. ; /Naval Research Lab, Wash., D.C. /Natl. Acad. Sci. ; Ackermann, M. ; Ajello, M. ; Allafort, A. ; /SLAC /KIPAC, Menlo Park /Stanford U., HEPL /Stanford U., Phys. Dept. ; Atwood, W.B. ; /UC, Santa Cruz ; Baldini, L. ; /INFN, Pisa ;

  11. Fermi Observations of GRB 090510: a Short Hard Gamma-Ray Burst with an

    Office of Scientific and Technical Information (OSTI)

    Additional, Hard Power-Law Component from 10 KeV to GeV Energies (Journal Article) | SciTech Connect Observations of GRB 090510: a Short Hard Gamma-Ray Burst with an Additional, Hard Power-Law Component from 10 KeV to GeV Energies Citation Details In-Document Search Title: Fermi Observations of GRB 090510: a Short Hard Gamma-Ray Burst with an Additional, Hard Power-Law Component from 10 KeV to GeV Energies Authors: Ackermann, M. ; /Stanford U., HEPL /KIPAC, Menlo Park /Stanford U., Phys.

  12. Search for Large Extra Dimensions Based on Observations of Neutron Stars with the Fermi-LAT

    SciTech Connect (OSTI)

    Berenji, Bijan; /Stanford U., Appl. Phys. Dept. /SLAC

    2012-09-19

    Large extra dimensions (LED) have been proposed to account for the apparent weakness of gravitation. These theories also indicate that the postulated massive Kaluza-Klein (KK) gravitons may be produced by nucleon-nucleon bremsstrahlung in the course of core collapse of supernovae. Hannestad and Raffelt have predicted energy spectra of gamma ray emission from the decay of KK gravitons trapped by the gravity of the remnant neutron stars (NS). These and other authors have used EGRET data on NS to obtain stringent limits on LED. Fermi-LAT is observing radio pulsar positions obtained from radio and x-ray catalogs. NS with certain characteristics are unlikely emitter of gamma rays, and emit in radio and perhaps x-rays. This talk will focus on the blind analysis we plan to perform, which has been developed using the 1st 2 months of all sky data and Monte Carlo simulations, to obtain limits on LED based on about 1 year of Fermi-LAT data. Preliminary limits from this analysis using these first 2 months of data will be also be discussed.

  13. Multi-wavelength emission from the Fermi bubbles. I. Stochastic acceleration from background plasma

    SciTech Connect (OSTI)

    Cheng, K. S.; Chernyshov, D. O.; Dogiel, V. A.; Ko, C. M.

    2014-07-20

    We analyze processes of electron acceleration in the Fermi bubbles in order to define parameters and restrictions of the models, which are suggested for the origin of these giant radio and gamma-ray structures. In the case of the leptonic origin of the nonthermal radiation from the bubbles, these electrons should be produced somehow in situ because of the relatively short lifetime of high-energy electrons, which lose their energy by synchrotron and inverse-Compton processes. It has been suggested that electrons in bubbles may be accelerated by shocks produced by tidal disruption of stars accreting onto the central black hole or a process of re-acceleration of electrons ejected by supernova remnants. These processes will be investigated in subsequent papers. In this paper, we focus on in situ stochastic (Fermi) acceleration by a hydromagnetic/supersonic turbulence, in which electrons can be directly accelerated from the background plasma. We showed that the acceleration from the background plasma is able to explain the observed fluxes of radio and gamma-ray emission from the bubbles, but the range of permitted parameters of the model is strongly restricted.

  14. Direct constraints on minimal supersymmetry from Fermi-LAT observations of the dwarf galaxy Segue 1

    SciTech Connect (OSTI)

    Scott, Pat; Conrad, Jan; Edsj, Joakim; Bergstrm, Lars; Akrami, Yashar; Farnier, Christian E-mail: conrad@fysik.su.se E-mail: lbe@fysik.su.se E-mail: yashar@fysik.su.se

    2010-01-01

    The dwarf galaxy Segue 1 is one of the most promising targets for the indirect detection of dark matter. Here we examine what constraints 9 months of Fermi-LAT gamma-ray observations of Segue 1 place upon the Constrained Minimal Supersymmetric Standard Model (CMSSM), with the lightest neutralino as the dark matter particle. We use nested sampling to explore the CMSSM parameter space, simultaneously fitting other relevant constraints from accelerator bounds, the relic density, electroweak precision observables, the anomalous magnetic moment of the muon and B-physics. We include spectral and spatial fits to the Fermi observations, a full treatment of the instrumental response and its related uncertainty, and detailed background models. We also perform an extrapolation to 5 years of observations, assuming no signal is observed from Segue 1 in that time. Results marginally disfavour models with low neutralino masses and high annihilation cross-sections. Virtually all of these models are however already disfavoured by existing experimental or relic density constraints.

  15. Observations of MilkyWay Dwarf Spheroidal galaxies with the Fermi-LAT detector and

    SciTech Connect (OSTI)

    Abdo, A.A.; Ackermann, M.; Ajello, M.; Atwood, W.B.; Baldini, L.; Ballet, J.; Barbiellini, G.; Bastieri, D.; Bechtol, K.; Bellazzini, R.; Berenji, B.; Bloom, E.D.; Bonamente, E.; Borgland, A.W.; Bregeon, J.; Brez, A.; Brigida, M.; Bruel, P.; Burnett, T.H.; Buson, S.; Caliandro, G.A.

    2010-05-26

    We report on the observations of 14 dwarf spheroidal galaxies with the Fermi Gamma-Ray Space Telescope taken during the first 11 months of survey mode operations. The Fermi telescope, which is conducting an all-sky {gamma}-ray survey in the 20 MeV to >300 GeV energy range, provides a new opportunity to test particle dark matter models through the expected {gamma}-ray emission produced by pair annihilation of weakly interacting massive particles (WIMPs). Local Group dwarf spheroidal galaxies, the largest galactic substructures predicted by the cold dark matter scenario, are attractive targets for such indirect searches for dark matter because they are nearby and among the most extreme dark matter dominated environments. No significant {gamma}-ray emission was detected above 100 MeV from the candidate dwarf galaxies. We determine upper limits to the {gamma}-ray flux assuming both power-law spectra and representative spectra from WIMP annihilation. The resulting integral flux above 100 MeV is constrained to be at a level below around 10{sup -9} photons cm{sup -2}s{sup -1}. Using recent stellar kinematic data, the {gamma}-ray flux limits are combined with improved determinations of the dark matter density profile in 8 of the 14 candidate dwarfs to place limits on the pair annihilation cross-section ofWIMPs in several widely studied extensions of the standard model, including its supersymmetric extension and other models that received recent attention. With the present data, we are able to rule out large parts of the parameter space where the thermal relic density is below the observed cosmological dark matter density and WIMPs (neutralinos here) are dominantly produced non-thermally, e.g. in models where supersymmetry breaking occurs via anomaly mediation. The {gamma}-ray limits presented here also constrain some WIMP models proposed to explain the Fermi and PAMELA e{sup +}e{sup -} data, including low-mass wino-like neutralinos and models with TeV masses pair-annihilating into muon-antimuon pairs.

  16. A hadronic-leptonic model for the Fermi bubbles: Cosmic-rays in the galactic halo and radio emission

    SciTech Connect (OSTI)

    Fujita, Yutaka; Ohira, Yutaka; Yamazaki, Ryo

    2014-07-01

    We investigate non-thermal emission from the Fermi bubbles in a hadronic model. Cosmic-ray (CR) protons are accelerated at the forward shock of the bubbles. They interact with the background gas in the Galactic halo and create ?{sup 0}-decay gamma-rays and secondary electrons through proton-proton interaction. We follow the evolution of the CR protons and electrons by calculating their distribution functions. We find that the spectrum and the intensity profiles of ?{sup 0}-decay gamma-rays are consistent with observations. We predict that the shock front is located far ahead of the gamma-ray boundary of the Fermi bubbles. This naturally explains the fact that a clear temperature jump of thermal gas was not discovered at the gamma-ray boundary in recent Suzaku observations. We also consider re-acceleration of the background CRs in the Galactic halo at the shock front. We find that it can significantly affect the gamma-rays from the Fermi bubbles, unless the density of the background CRs is ? 10% of that in the Galactic disk. We indicate that secondary electrons alone cannot produce the observed radio emission from the Fermi bubbles. However, the radio emission from the outermost region of the bubbles can be explained if electrons are directly accelerated at the shock front with an efficiency of ?0.1% of that of protons.

  17. PROBING THE FERMI BUBBLES IN ULTRAVIOLET ABSORPTION: A SPECTROSCOPIC SIGNATURE OF THE MILKY WAY'S BICONICAL NUCLEAR OUTFLOW

    SciTech Connect (OSTI)

    Fox, Andrew J.; Bordoloi, Rongmon; Hernandez, Svea; Tumlinson, Jason; Savage, Blair D.; Wakker, Bart P.; Lockman, Felix J.; Bland-Hawthorn, Joss; Kim, Tae-Sun; Benjamin, Robert A.

    2015-01-20

    Giant lobes of plasma extend ?55 above and below the Galactic center, glowing in emission from gamma rays (the Fermi Bubbles) to microwaves and polarized radio waves. We use ultraviolet absorption-line spectra from the Hubble Space Telescope to constrain the velocity of the outflowing gas within these regions, targeting the quasar PDS456 (?, b = 10.4, +11.2). This sightline passes through a clear biconical structure seen in hard X-ray and gamma-ray emission near the base of the northern Fermi Bubble. We report two high-velocity metal absorption components, at v {sub LSR} = 235 and +250kms{sup 1}, which cannot be explained by co-rotating gas in the Galactic disk or halo. Their velocities are suggestive of an origin on the front and back side of an expanding biconical outflow emanating from the Galactic center. We develop simple kinematic biconical outflow models that can explain the observed profiles with an outflow velocity of ?900kms{sup 1} and a full opening angle of ?110 (matching the X-ray bicone). This indicates Galactic center activity over the last ?2.5-4.0Myr, in line with age estimates of the Fermi Bubbles. The observations illustrate the use of UV spectroscopy to probe the properties of swept-up gas venting into the Fermi Bubbles.

  18. Constraining Inert Triplet dark matter by the LHC and FermiLAT

    SciTech Connect (OSTI)

    Ayazi, Seyed Yaser; Firouzabadi, S. Mahdi E-mail: smmfirouz@yahoo.com

    2014-11-01

    We study collider phenomenology of inert triplet scalar dark matter at the LHC. We discuss possible decay of Higgs boson to dark matter candidate and apply current experimental data for invisible Higgs decay and R{sub ??} to constrain parameter space of our model. We also investigate constraints on dark matter coming from forthcoming measurement, R{sub Z?} and mono-Higgs production. We analytically calculate the annihilation cross section of dark matter candidate into 2? and Z? and then use FermiLAT data to put constraints on parameter space of Inert Triplet Model. We found that this limit can be stronger than the constraints provided by LUX experiment for low mass DM.

  19. FERMI LIMIT ON THE NEUTRINO FLUX FROM GAMMA-RAY BURSTS

    SciTech Connect (OSTI)

    Li Zhuo [Department of Astronomy and Kavli Institute for Astronomy and Astrophysics, Peking University, Beijing (China); Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming (China)

    2013-06-20

    If gamma-ray bursts (GRBs) produce high-energy cosmic rays, neutrinos are expected to be generated in GRBs via photo-pion productions. However, we stress that the same process also generates electromagnetic (EM) emission induced by the secondary electrons and photons, and that the EM emission is expected to be correlated with neutrino flux. Using Fermi/Large Area Telescope results on gamma-ray flux from GRBs, the GRB neutrino emission is limited to be <20 GeV m{sup -2} per GRB event on average, which is independent of the unknown GRB proton luminosity. This neutrino limit suggests that IceCube, operating at full scale, requires stacking of more than 130 GRBs in order to detect one GRB muon neutrino.

  20. Spectrometer for X-ray emission experiments at FERMI free-electron-laser

    SciTech Connect (OSTI)

    Poletto, L. Frassetto, F.; Miotti, P.; Di Cicco, A.; Iesari, F.; Finetti, P.; Grazioli, C.; Kivimäki, A.; Stagira, S.; Coreno, M.

    2014-10-15

    A portable and compact photon spectrometer to be used for photon in-photon out experiments, in particular x-ray emission spectroscopy, is presented. The instrument operates in the 25–800 eV energy range to cover the full emissions of the FEL1 and FEL2 stages of FERMI. The optical design consists of two interchangeable spherical varied-lined-spaced gratings and a CCD detector. Different input sections can be accommodated, with/without an entrance slit and with/without an additional relay mirror, that allow to mount the spectrometer in different end-stations and at variable distances from the target area both at synchrotron and at free-electron-laser beamlines. The characterization on the Gas Phase beamline at ELETTRA Synchrotron (Italy) is presented.

  1. Orthogonality catastrophe as a consequence of qubit embedding in an ultracold Fermi gas

    SciTech Connect (OSTI)

    Goold, J. [Clarendon Laboratory, University of Oxford (United Kingdom); Physics Department, University College Cork, Cork (Ireland); Fogarty, T.; Lo Gullo, N.; Busch, Th. [Physics Department, University College Cork, Cork (Ireland); Paternostro, M. [Centre for Theoretical Atomic, Molecular and Optical Physics, Queen's University Belfast, Belfast BT7 1NN (United Kingdom)

    2011-12-15

    We investigate the behavior of a two-level atom coupled to a one-dimensional, ultracold Fermi gas. The sudden switching on of the scattering between the two entities leads to the loss of any coherence in the initial state of the impurity and we show that the exact dynamics of this process is strongly influenced by the effect of the orthogonality catastrophe within the gas. We highlight the relationship between the Loschmidt echo and the retarded Green's function - typically used to formulate the dynamical theory of the catastrophe - and demonstrate that the effect is reflected in the impurity dynamics. We show that the expected nonexponential decay of the spectral function can be observed using Ramsey interferometry on the two-level atom and comment on finite temperature effects.

  2. Current Research at the University of Chicago Enrico Fermi Institute and James Franck Institute

    ScienceCinema (OSTI)

    Simon Swordy

    2010-01-08

    These talks will give an overview of physics research at the University of Chicago centered in two research institutes. The Enrico Fermi Institute pursues research in some core areas of the physical sciences. These include cosmology, particle physics, theoretical physics, particle astrophysics, and cosmochemistry. The EFI talk will focus on some examples of these activities which together will provide a broad overview of EFI science. Research at the James Franck Institute centers on the intersection between physics, chemistry and materials science, with the aim to unravel the complex connections between structure and dynamics in condensed matter systems. The JFI is also home to the Chicago Materials Research Science and Engineering Center. The JFI talk will provide highlights of current projects by JFI members.

  3. Improved Measurement of the Positive-Muon Lifetime and Determination of the Fermi Constant

    SciTech Connect (OSTI)

    Chitwood, D. B.; Clayton, S. M.; Crnkovic, J.; Debevec, P. T.; Hertzog, D. W.; Kammel, P.; Kiburg, B.; Kunkle, J.; McNabb, R.; Mulhauser, F.; Oezben, C. S.; Polly, C. C.; Webber, D. M.; Winter, P.; Banks, T. I.; Crowe, K. M.; Lauss, B.; Barnes, M. J.; Wait, G. D.; Battu, S.

    2007-07-20

    The mean life of the positive muon has been measured to a precision of 11 ppm using a low-energy, pulsed muon beam stopped in a ferromagnetic target, which was surrounded by a scintillator detector array. The result, {tau}{sub {mu}}=2.197 013(24) {mu}s, is in excellent agreement with the previous world average. The new world average {tau}{sub {mu}}=2.197 019(21) {mu}s determines the Fermi constant G{sub F}=1.166 371(6)x10{sup -5} GeV{sup -2} (5 ppm). Additionally, the precision measurement of the positive-muon lifetime is needed to determine the nucleon pseudoscalar coupling g{sub P}.

  4. CONSTRAINING THE HIGH-ENERGY EMISSION FROM GAMMA-RAY BURSTS WITH FERMI

    SciTech Connect (OSTI)

    Ackermann, M. [Deutsches Elektronen Synchrotron DESY, D-15738 Zeuthen (Germany); Ajello, M.; Bechtol, K.; Blandford, R. D.; Bloom, E. D.; Borgland, A. W.; Bottacini, E.; Buehler, R.; Cameron, R. A.; Charles, E. [W. W. Hansen Experimental Physics Laboratory, Kavli Institute for Particle Astrophysics and Cosmology, Department of Physics and SLAC National Accelerator Laboratory, Stanford University, Stanford, CA 94305 (United States); Baldini, L.; Bellazzini, R. [Istituto Nazionale di Fisica Nucleare, Sezione di Pisa, I-56127 Pisa (Italy); Barbiellini, G. [Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, I-34127 Trieste (Italy); Baring, M. G. [Department of Physics and Astronomy, Rice University, MS-108, P.O. Box 1892, Houston, TX 77251 (United States); Bonamente, E.; Cecchi, C. [Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, I-06123 Perugia (Italy); Bouvier, A. [Santa Cruz Institute for Particle Physics, Department of Physics and Department of Astronomy and Astrophysics, University of California at Santa Cruz, Santa Cruz, CA 95064 (United States); Brigida, M. [Dipartimento di Fisica 'M. Merlin' dell'Universita e del Politecnico di Bari, I-70126 Bari (Italy); Buson, S. [Istituto Nazionale di Fisica Nucleare, Sezione di Padova, I-35131 Padova (Italy); Caliandro, G. A., E-mail: jchiang@slac.stanford.edu, E-mail: kocevski@slac.stanford.edu, E-mail: moretti@particle.kth.se, E-mail: connauv@uah.edu, E-mail: valerie@nasa.gov, E-mail: michael.briggs@nasa.gov [Institut de Ciencies de l'Espai (IEEE-CSIC), Campus UAB, E-08193 Barcelona (Spain); Collaboration: Fermi Large Area Telescope Team; Fermi Gamma-ray Burst Monitor Team; and others

    2012-08-01

    We examine 288 gamma-ray bursts (GRBs) detected by the Fermi Gamma-ray Space Telescope's Gamma-ray Burst Monitor (GBM) that fell within the field of view of Fermi's Large Area Telescope (LAT) during the first 2.5 years of observations, which showed no evidence for emission above 100 MeV. We report the photon flux upper limits in the 0.1-10 GeV range during the prompt emission phase as well as for fixed 30 s and 100 s integrations starting from the trigger time for each burst. We compare these limits with the fluxes that would be expected from extrapolations of spectral fits presented in the first GBM spectral catalog and infer that roughly half of the GBM-detected bursts either require spectral breaks between the GBM and LAT energy bands or have intrinsically steeper spectra above the peak of the {nu}F{sub {nu}} spectra (E{sub pk}). In order to distinguish between these two scenarios, we perform joint GBM and LAT spectral fits to the 30 brightest GBM-detected bursts and find that a majority of these bursts are indeed softer above E{sub pk} than would be inferred from fitting the GBM data alone. Approximately 20% of this spectroscopic subsample show statistically significant evidence for a cutoff in their high-energy spectra, which if assumed to be due to {gamma}{gamma} attenuation, places limits on the maximum Lorentz factor associated with the relativistic outflow producing this emission. All of these latter bursts have maximum Lorentz factor estimates that are well below the minimum Lorentz factors calculated for LAT-detected GRBs, revealing a wide distribution in the bulk Lorentz factor of GRB outflows and indicating that LAT-detected bursts may represent the high end of this distribution.

  5. Two-band description of resonant superfluidity in atomic Fermi gases

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

    He, Lianyi; Hu, Hui; Liu, Xia -Ji

    2015-02-23

    Fermionic superfluidity in atomic Fermi gases across a Feshbach resonance is normally described by the atom-molecule theory, which treats the closed channel as a noninteracting point boson. In this work we present a theoretical description of the resonant superfluidity in analogy to the two-band superconductors. We employ the underlying two-channel scattering model of Feshbach resonance where the closed channel is treated as a composite boson with binding energy ε0 and the resonance is triggered by the microscopic interchannel coupling U12. The binding energy ε0 naturally serves as an energy scale of the system, which has been sent to infinity inmore » the atom-molecule theory. We show that the atom-molecule theory can be viewed as a leading-order low-energy effective theory of the underlying fermionic theory in the limit ε0→∞ and U12→0, while keeping the phenomenological atom-molecule coupling finite. The resulting two-band description of the superfluid state is in analogy to the BCS theory of two-band superconductors. In the dilute limit ε0→∞, the two-band description recovers precisely the atom-molecule theory. The two-band theory provides a natural approach to study the corrections because of a finite binding energy ε0 in realistic experimental systems. For broad and moderate resonances, the correction is not important for current experimental densities. However, for extremely narrow resonance, we find that the correction becomes significant. Lastly, the finite binding energy correction could be important for the stability of homogeneous polarized superfluid against phase separation in imbalanced Fermi gases across a narrow Feshbach resonance.« less

  6. Jet emission in young radio sources: A Fermi large area telescope gamma-ray view

    SciTech Connect (OSTI)

    Migliori, G.; Siemiginowska, A.; Kelly, B. C.; Stawarz, ?.; Celotti, A.; Begelman, M. C.

    2014-01-10

    We investigate the contribution of the beamed jet component to the high-energy emission in young and compact extragalactic radio sources, focusing for the first time on the ?-ray band. We derive predictions on the ?-ray luminosities associated with the relativistic jet assuming a leptonic radiative model. The high-energy emission is produced via Compton scattering by the relativistic electrons in a spherical region at the considered scales (?10 kpc). Simulations show a wide range of ?-ray luminosities, with intensities up to ?10{sup 46}-10{sup 48} erg s{sup 1} depending on the assumed jet parameters. We find a highly linear relation between the simulated X-ray and ?-ray luminosities that can be used to select candidates for ?-ray detection. We compare the simulated luminosity distributions in the radio, X-ray, and ?-ray regimes with observations for the largest sample of X-ray-detected young radio quasars. Our analysis of ?4-yr Fermi Large Area Telescope (LAT) data does not yield any statistically significant detections. However, the majority of the model-predicted ?-ray fluxes for the sample are near or below the current Fermi-LAT flux threshold and compatible with the derived upper limits. Our study gives constraints on the minimum jet power (L {sub jet,} {sub kin}/L {sub disk} > 0.01) of a potential jet contribution to the X-ray emission in the most compact sources (? 1 kpc) and on the particle-to-magnetic field energy density ratio that are in broad agreement with equipartition assumptions.

  7. Fermi level pinning in Fe-doped PbTe under pressure

    SciTech Connect (OSTI)

    Skipetrov, E. P. Kruleveckaya, O. V.; Skipetrova, L. A.; Slynko, E. I.; Slynko, V. E.

    2014-07-14

    We synthesize an iron-doped PbTe single-crystal ingot and investigate the phase and the elemental composition as well as galvanomagnetic properties in weak magnetic fields (4.2?K?T?300?K, B???0.07?T) of Pb{sub 1?y}Fe{sub y}Te alloys upon varying the iron content, at atmospheric pressure and under hydrostatic compression up to 10 kilobars. We find an increase of iron concentration along the length of the ingot and the appearance of microscopic inclusions enriched with iron in the heavily doped samples. Lightly doped alloys are characterized by the p-type metal conductivity. An increase of the iron impurity content leads to a decrease in the free hole concentration, a stabilization of galvanomagnetic parameters, indicating the pinning of the Fermi energy by the iron resonant impurity level lying under the bottom of the valence band, and to the p-n inversion of the conductivity type. Under pressure, the free hole concentration in the sample, in which the stabilization of galvanomagnetic parameters takes place, increases by approximately a factor of four due to the flow of electrons from the valence band to the iron-induced resonant level. Using the two-band Kane and the six-band Dimmock dispersion relations, the pressure dependence of the Fermi energy is calculated. The model of the electronic structure rearrangement of Pb{sub 1?y}Fe{sub y}Te under pressure is proposed. The energy position and the pressure coefficient of the resonant iron impurity level are determined.

  8. Observation of an electron band above the Fermi level in FeTe₀.₅₅Se₀.₄₅ from in-situ surface doping

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

    Zhang, P.; Richard, P.; Xu, N.; Xu, Y. -M.; Ma, J.; Qian, T.; Fedorov, A. V.; Denlinger, J. D.; Gu, G. D.; Ding, H.

    2014-10-27

    We used in-situ potassium (K) evaporation to dope the surface of the iron-based superconductor FeTe₀.₅₅Se₀.₄₅. The systematic study of the bands near the Fermi level confirms that electrons are doped into the system, allowing us to tune the Fermi level of this material and to access otherwise unoccupied electronic states. In particular, we observe an electron band located above the Fermi level before doping that shares similarities with a small three-dimensional pocket observed in the cousin, heavily-electron-doped KFe₂₋xSe₂ compound.

  9. Observation of an electron band above the Fermi level in FeTe?.??Se?.?? from in-situ surface doping

    SciTech Connect (OSTI)

    Zhang, P.; Richard, P.; Xu, N.; Xu, Y. -M.; Ma, J.; Qian, T.; Fedorov, A. V.; Denlinger, J. D.; Gu, G. D.; Ding, H.

    2014-10-27

    We used in-situ potassium (K) evaporation to dope the surface of the iron-based superconductor FeTe?.??Se?.??. The systematic study of the bands near the Fermi level confirms that electrons are doped into the system, allowing us to tune the Fermi level of this material and to access otherwise unoccupied electronic states. In particular, we observe an electron band located above the Fermi level before doping that shares similarities with a small three-dimensional pocket observed in the cousin, heavily-electron-doped KFe??xSe? compound.

  10. Alleviation of fermi-level pinning effect at metal/germanium interface by the insertion of graphene layers

    SciTech Connect (OSTI)

    Baek, Seung-heon Chris; Seo, Yu-Jin; Oh, Joong Gun; Albert Park, Min Gyu; Bong, Jae Hoon; Yoon, Seong Jun; Lee, Seok-Hee, E-mail: seokheelee@ee.kaist.ac.kr [Department of Electrical Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 305-701 (Korea, Republic of); Seo, Minsu; Park, Seung-young [Division of Materials Science, Korea Basic Science Institute (KBSI), 169-148 Daehak-ro, Yuseong-gu, Daejeon 305-333 (Korea, Republic of); Park, Byong-Guk [Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-ro, Yuseong-gu, Daejeon 305-701 (Korea, Republic of)

    2014-08-18

    In this paper, we report the alleviation of the Fermi-level pinning on metal/n-germanium (Ge) contact by the insertion of multiple layers of single-layer graphene (SLG) at the metal/n-Ge interface. A decrease in the Schottky barrier height with an increase in the number of inserted SLG layers was observed, which supports the contention that Fermi-level pinning at metal/n-Ge contact originates from the metal-induced gap states at the metal/n-Ge interface. The modulation of Schottky barrier height by varying the number of inserted SLG layers (m) can bring about the use of Ge as the next-generation complementary metal-oxide-semiconductor material. Furthermore, the inserted SLG layers can be used as the tunnel barrier for spin injection into Ge substrate for spin-based transistors.

  11. The electron-positron momentum density and Fermi surface of YBa sub 2 Cu sub 3 O sub 7-x

    SciTech Connect (OSTI)

    Haghighi, H.; Kaiser, J.H.; Rayner, S.; West, R.N. ); Liu, J.Z.; Shelton, R. ); Howell, R.H.; Solal, F.; Sterne, P.A.; Fluss, M.J. )

    1991-10-11

    The search for evidence of Fermi surface in the cuprate high temperature superconductors has provided the greatest challenge for the 2D ACAR technique thus far in its relatively short history. Much of the effort in both theory and experiment has focused on the Yttrium compound where the small size of samples, twinning and structural oxygen defects have made the experiments difficult, complicated the interpretation of results and led to some confusion. With the advent of good twin-free crystals that confusion has now been resolved. In this paper we shall briefly review the earlier experiments on twinned crystals and then describe in more detail, and in the context of the contemporary bandstructure theory, our recent clear resolution of a major Fermi surface section in untwinned crystals of YBa{sub 2}Cu{sub 3}O{sub 7-x}.

  12. Presidential Early Career Awards for Scientists and Engineers (PECASE) |

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

    U.S. DOE Office of Science (SC) Presidential Early Career Awards for Scientists and Engineers (PECASE) About About Home Organization Budget Field Offices Federal Advisory Committees History Scientific and Technical Information Honors & Awards Presidential Early Career Awards for Scientists and Engineers (PECASE) DOE's Winners Since 1996 2012 Ceremony 2014 Ceremony The Enrico Fermi Award The Ernest Orlando Lawrence Award DOE Nobel Laureates Federal Laboratory Consortium Excellence in

  13. DOE-Funded Research Projects Win 35 R&D 100 Awards for 2003 | U.S. DOE

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

    Office of Science (SC) 35 R&D 100 Awards for 2003 About About Home Organization Budget Field Offices Federal Advisory Committees History Scientific and Technical Information Honors & Awards Presidential Early Career Awards for Scientists and Engineers (PECASE) The Enrico Fermi Award The Ernest Orlando Lawrence Award DOE Nobel Laureates Federal Laboratory Consortium Excellence in Technology Transfer Awards R&D 100 Awards Jobs Brochures, Logos, & Information Resources Contact

  14. Recent progress in III-V based ferromagnetic semiconductors: Band structure, Fermi level, and tunneling transport

    SciTech Connect (OSTI)

    Tanaka, Masaaki; Ohya, Shinobu Nam Hai, Pham

    2014-03-15

    Spin-based electronics or spintronics is an emerging field, in which we try to utilize spin degrees of freedom as well as charge transport in materials and devices. While metal-based spin-devices, such as magnetic-field sensors and magnetoresistive random access memory using giant magnetoresistance and tunneling magnetoresistance, are already put to practical use, semiconductor-based spintronics has greater potential for expansion because of good compatibility with existing semiconductor technology. Many semiconductor-based spintronics devices with useful functionalities have been proposed and explored so far. To realize those devices and functionalities, we definitely need appropriate materials which have both the properties of semiconductors and ferromagnets. Ferromagnetic semiconductors (FMSs), which are alloy semiconductors containing magnetic atoms such as Mn and Fe, are one of the most promising classes of materials for this purpose and thus have been intensively studied for the past two decades. Here, we review the recent progress in the studies of the most prototypical III-V based FMS, p-type (GaMn)As and its heterostructures with focus on tunneling transport, Fermi level, and bandstructure. Furthermore, we cover the properties of a new n-type FMS, (In,Fe)As, which shows electron-induced ferromagnetism. These FMS materials having zinc-blende crystal structure show excellent compatibility with well-developed III-V heterostructures and devices.

  15. Ground-state and dynamical properties of two-dimensional dipolar Fermi liquids

    SciTech Connect (OSTI)

    Abedinpour, Saeed H.; Asgari, Reza; Tanatar, B.; Polini, Marco

    2014-01-15

    We study the ground-state properties of a two-dimensional spin-polarized fluid of dipolar fermions within the EulerLagrange Fermi-hypernetted-chain approximation. Our method is based on the solution of a scattering Schrdinger equation for the pair amplitude ?(g(r)), where g(r) is the pair distribution function. A key ingredient in our theory is the effective pair potential, which includes a bosonic term from JastrowFeenberg correlations and a fermionic contribution from kinetic energy and exchange, which is tailored to reproduce the HartreeFock limit at weak coupling. Very good agreement with recent results based on quantum Monte Carlo simulations is achieved over a wide range of coupling constants up to the liquid-to-crystal quantum phase transition. Using the fluctuationdissipation theorem and a static approximation for the effective inter-particle interactions, we calculate the dynamical densitydensity response function, and furthermore demonstrate that an undamped zero-sound mode exists for any value of the interaction strength, down to infinitesimally weak couplings. -- Highlights: We have studied the ground state properties of a strongly correlated two-dimensional fluid of dipolar fermions. We have calculated the effective inter-particle interaction and the dynamical densitydensity response function. We have shown that an undamped zero sound mode exists at any value of the interaction strength.

  16. Implications of Fermi-LAT observations on the origin of IceCube neutrinos

    SciTech Connect (OSTI)

    Wang, Bin; Li, Zhuo [Department of Astronomy, School of Physics, Peking University, Beijing (China); Zhao, Xiaohong, E-mail: wang_b@pku.edu.cn, E-mail: zhaoxh@ynao.ac.cn, E-mail: zhuo.li@pku.edu.cn [Yunnan Observatories, Chinese Academy of Sciences, Kunming (China)

    2014-11-01

    The IceCube (IC) collaboration recently reported the detection of TeV-PeV extraterrestrial neutrinos whose origin is yet unknown. By the photon-neutrino connection in pp and p? interactions, we use the Fermi-LAT observations to constrain the origin of the IC detected neutrinos. We find that Galactic origins, i.e., the diffuse Galactic neutrinos due to cosmic ray (CR) propagation in the Milky Way, and the neutrinos from the Galactic point sources, may not produce the IC neutrino flux, thus these neutrinos should be of extragalactic origin. Moreover, the extragalactic gamma-ray bursts (GRBs) may not account for the IC neutrino flux, the jets of active galactic nuclei may not produce the IC neutrino spectrum, but the starburst galaxies (SBGs) may be promising sources. As suggested by the consistency between the IC detected neutrino flux and the Waxman-Bahcall bound, GRBs in SBGs may be the sources of both the ultrahigh energy, ?> 10{sup 19}eV, CRs and the 1100 PeV CRs that produce the IC detected TeV-PeV neutrinos.

  17. THE FERMI GBM GAMMA-RAY BURST SPECTRAL CATALOG: FOUR YEARS OF DATA

    SciTech Connect (OSTI)

    Gruber, David; Von Ahlefeld, Victoria Weller; Diehl, Roland; Greiner, Jochen; Von Kienlin, Andreas [Max-Planck-Institut fr extraterrestrische Physik, Giessenbachstrasse 1, D-85748 Garching (Germany); Goldstein, Adam; Bhat, P. Narayana; Briggs, Michael S.; Connaughton, Valerie [University of Alabama in Huntsville, 320 Sparkman Drive, Huntsville, AL 35805 (United States); Bissaldi, Elisabetta [Istituto Nazionale di Fisica Nucleare, Sezione di Trieste, I-34127 Trieste (Italy); Byrne, Dave; Fitzpatrick, Gerard; Foley, Suzanne [School of Physics, University College Dublin, Belfield, Stillorgan Road, Dublin 4 (Ireland); Cleveland, William H. [Universities Space Research Association, 320 Sparkman Drive, Huntsville, AL 35805 (United States); Fishman, Gerald J.; Kouveliotou, Chryssa [Space Science Office, VP62, NASA/Marshall Space Flight Center, Huntsville, AL 35812 (United States); Gibby, Melissa; Giles, Misty M. [Jacobs Technology, Inc., Huntsville, AL (United States); Guiriec, Sylvain [NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States); Van der Horst, Alexander J. [Astronomical Institute, University of Amsterdam, Science Park 904, 1098 XH Amsterdam (Netherlands); and others

    2014-03-01

    In this catalog we present the updated set of spectral analyses of gamma-ray bursts (GRBs) detected by the Fermi Gamma-Ray Burst Monitor during its first four years of operation. It contains two types of spectra, time-integrated spectral fits and spectral fits at the brightest time bin, from 943 triggered GRBs. Four different spectral models were fitted to the data, resulting in a compendium of more than 7500 spectra. The analysis was performed similarly but not identically to Goldstein et al. All 487 GRBs from the first two years have been re-fitted using the same methodology as that of the 456 GRBs in years three and four. We describe, in detail, our procedure and criteria for the analysis and present the results in the form of parameter distributions both for the observer-frame and rest-frame quantities. The data files containing the complete results are available from the High-Energy Astrophysics Science Archive Research Center.

  18. Reduction of Fermi level pinning and recombination at polycrystalline CdTe surfaces by laser irradiation

    SciTech Connect (OSTI)

    Simonds, Brian J.; Kheraj, Vipul; Palekis, Vasilios; Ferekides, Christos; Scarpulla, Michael A.

    2015-06-14

    Laser processing of polycrystalline CdTe is a promising approach that could potentially increase module manufacturing throughput while reducing capital expenditure costs. For these benefits to be realized, the basic effects of laser irradiation on CdTe must be ascertained. In this study, we utilize surface photovoltage spectroscopy (SPS) to investigate the changes to the electronic properties of the surface of polycrystalline CdTe solar cell stacks induced by continuous-wave laser annealing. The experimental data explained within a model consisting of two space charge regions, one at the CdTe/air interface and one at the CdTe/CdS junction, are used to interpret our SPS results. The frequency dependence and phase spectra of the SPS signal are also discussed. To support the SPS findings, low-temperature spectrally-resolved photoluminescence and time-resolved photoluminescence were also measured. The data show that a modest laser treatment of 250 W/cm{sup 2} with a dwell time of 20 s is sufficient to reduce the effects of Fermi level pinning at the surface due to surface defects.

  19. Fermi Large Area Telescope Measurements of the Diffuse Gamma-Ray Emission at Intermediate Galactic Latitudes

    SciTech Connect (OSTI)

    Abdo, A.A.; Ackermann, M.; Ajello, M.; Anderson, B.; Atwood, W.B.; Axelsson, M.; Baldini, L.; Ballet, J.; Barbiellini, G.; Bastieri, D.; Baughman, B.M.; Bechtol, K.; Bellazzini, R.; Berenji, B.; Blandford, R.D.; Bloom, E.D.; Bonamente, E.; Borgland, A.W.; Bregeon, J.; Brez, A.; Brigida, M.; /more authors..

    2012-04-11

    The diffuse galactic {gamma}-ray emission is produced by cosmic rays (CRs) interacting with the interstellar gas and radiation field. Measurements by the Energetic Gamma-Ray Experiment Telescope (EGRET) instrument on the Compton Gamma-Ray Observatory indicated excess {gamma}-ray emission {ge}1 GeV relative to diffuse galactic {gamma}-ray emission models consistent with directly measured CR spectra (the so-called 'EGRET GeV excess'). The Large Area Telescope (LAT) instrument on the Fermi Gamma-Ray Space Telescope has measured the diffuse {gamma}-ray emission with improved sensitivity and resolution compared to EGRET. We report on LAT measurements for energies 100 MeV to 10 GeV and galactic latitudes 10{sup o} {le} |b| {le} 20{sup o}. The LAT spectrum for this region of the sky is well reproduced by a diffuse galactic {gamma}-ray emission model that is consistent with local CR spectra and inconsistent with the EGRET GeV excess.

  20. How electronic dynamics with Pauli exclusion produces Fermi-Dirac statistics

    SciTech Connect (OSTI)

    Nguyen, Triet S.; Nanguneri, Ravindra; Parkhill, John

    2015-04-07

    It is important that any dynamics method approaches the correct population distribution at long times. In this paper, we derive a one-body reduced density matrix dynamics for electrons in energetic contact with a bath. We obtain a remarkable equation of motion which shows that in order to reach equilibrium properly, rates of electron transitions depend on the density matrix. Even though the bath drives the electrons towards a Boltzmann distribution, hole blocking factors in our equation of motion cause the electronic populations to relax to a Fermi-Dirac distribution. These factors are an old concept, but we show how they can be derived with a combination of time-dependent perturbation theory and the extended normal ordering of Mukherjee and Kutzelnigg for a general electronic state. The resulting non-equilibrium kinetic equations generalize the usual Redfield theory to many-electron systems, while ensuring that the orbital occupations remain between zero and one. In numerical applications of our equations, we show that relaxation rates of molecules are not constant because of the blocking effect. Other applications to model atomic chains are also presented which highlight the importance of treating both dephasing and relaxation. Finally, we show how the bath localizes the electron density matrix.

  1. In-Flight Measurement of the Absolute Energy Scale of the Fermi Large Area Telescope

    SciTech Connect (OSTI)

    Ackermann, M.; Ajello, M.; Allafort, A.; Atwood, W.B.; Axelsson, M.; Baldini, L.; Barbiellini, G.; Bastieri, D.; Bechtol, K.; Bellazzini, R.; Berenji, B.; Bloom, E.D.; Bonamente, E.; Borgland, A.W.; Bouvier, A.; Bregeon, J.; Brez, A.; Brigida, M.; Bruel, P.; Buehler, R.; Buson, S.; /more authors..

    2012-09-20

    The Large Area Telescope (LAT) on-board the Fermi Gamma-ray Space Telescope is a pair-conversion telescope designed to survey the gamma-ray sky from 20 MeV to several hundreds of GeV. In this energy band there are no astronomical sources with sufficiently well known and sharp spectral features to allow an absolute calibration of the LAT energy scale. However, the geomagnetic cutoff in the cosmic ray electron-plus-positron (CRE) spectrum in low Earth orbit does provide such a spectral feature. The energy and spectral shape of this cutoff can be calculated with the aid of a numerical code tracing charged particles in the Earth's magnetic field. By comparing the cutoff value with that measured by the LAT in different geomagnetic positions, we have obtained several calibration points between {approx}6 and {approx}13 GeV with an estimated uncertainty of {approx}2%. An energy calibration with such high accuracy reduces the systematic uncertainty in LAT measurements of, for example, the spectral cutoff in the emission from gamma ray pulsars.

  2. Limits on dark matter annihilation signals from the Fermi LAT 4-year measurement of the isotropic gamma-ray background

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

    Ackermann, M.

    2015-09-02

    We search for evidence of dark matter (DM) annihilation in the isotropic gamma-ray background (IGRB) measured with 50 months of Fermi Large Area Telescope (LAT) observations. An improved theoretical description of the cosmological DM annihilation signal, based on two complementary techniques and assuming generic weakly interacting massive particle (WIMP) properties, renders more precise predictions compared to previous work. More specifically, we estimate the cosmologically-induced gamma-ray intensity to have an uncertainty of a factor ~ 20 in canonical setups. We consistently include both the Galactic and extragalactic signals under the same theoretical framework, and study the impact of the former onmore » the IGRB spectrum derivation. We find no evidence for a DM signal and we set limits on the DM-induced isotropic gamma-ray signal. Our limits are competitive for DM particle masses up to tens of TeV and, indeed, are the strongest limits derived from Fermi LAT data at TeV energies. This is possible thanks to the new Fermi LAT IGRB measurement, which now extends up to an energy of 820 GeV. As a result, we quantify uncertainties in detail and show the potential this type of search offers for testing the WIMP paradigm with a complementary and truly cosmological probe of DM particle signals.« less

  3. Gamma-Ray Observations of the Supernova Remnant RX J0852.0-4622 with the Fermi LAT

    SciTech Connect (OSTI)

    Tanaka, T.; Allafort, A.; Ballet, J.; Funk, S.; Giordano, F.; Hewitt, J.; Lemoine-Goumard, M.; Tajima, H.; Tibolla, O.; Uchiyama, Y.; /Stanford U., HEPL /KIPAC, Menlo Park

    2011-12-13

    We report on gamma-ray observations of the supernova remnant (SNR) RX J0852.0-4622 with the Large Area Telescope (LAT) aboard the Fermi Gamma-ray Space Telescope. In the Fermi LAT data, we find a spatially extended source at the location of the SNR. The extension is consistent with the SNR size seen in other wavelengths such as X-rays and TeV gamma rays, leading to the identification of the gamma-ray source with the SNR. The spectrum is well described as a power law with a photon index of {Lambda} = 1.85 {+-} 0.06 (stat){sub -0.19}{sup +0.18} (sys), which smoothly connects to the H.E.S.S. spectrum in the TeV energy band. We discuss the gamma-ray emission mechanism based on multiwavelength data. The broadband data can be fit well by a model in which the gamma rays are of hadronic origin. We also consider a scenario with inverse Compton scattering of electrons as the emission mechanism of the gamma rays. Although the leptonic model predicts a harder spectrum in the Fermi LAT energy range, the model can fit the data considering the statistical and systematic errors.

  4. Collective mode evidence of high-spin bosonization in a trapped one-dimensional atomic Fermi gas with tunable spin

    SciTech Connect (OSTI)

    Liu, Xia-Ji Hu, Hui

    2014-11-15

    We calculate the frequency of collective modes of a one-dimensional repulsively interacting Fermi gas with high-spin symmetry confined in harmonic traps at zero temperature. This is a system realizable with fermionic alkaline-earth-metal atoms such as {sup 173}Yb, which displays an exact SU(?) spin symmetry with ??2 and behaves like a spinless interacting Bose gas in the limit of infinite spin components ???, namely high-spin bosonization. We solve the homogeneous equation of state of the high-spin Fermi system by using Bethe ansatz technique and obtain the density distribution in harmonic traps based on local density approximation. The frequency of collective modes is calculated by exactly solving the zero-temperature hydrodynamic equation. In the limit of large number of spin-components, we show that the mode frequency of the system approaches that of a one-dimensional spinless interacting Bose gas, as a result of high-spin bosonization. Our prediction of collective modes is in excellent agreement with a very recent measurement for a Fermi gas of {sup 173}Yb atoms with tunable spin confined in a two-dimensional tight optical lattice.

  5. Limits on dark matter annihilation signals from the Fermi LAT 4-year measurement of the isotropic gamma-ray background

    SciTech Connect (OSTI)

    Ackermann, M.

    2015-09-02

    We search for evidence of dark matter (DM) annihilation in the isotropic gamma-ray background (IGRB) measured with 50 months of Fermi Large Area Telescope (LAT) observations. An improved theoretical description of the cosmological DM annihilation signal, based on two complementary techniques and assuming generic weakly interacting massive particle (WIMP) properties, renders more precise predictions compared to previous work. More specifically, we estimate the cosmologically-induced gamma-ray intensity to have an uncertainty of a factor ~ 20 in canonical setups. We consistently include both the Galactic and extragalactic signals under the same theoretical framework, and study the impact of the former on the IGRB spectrum derivation. We find no evidence for a DM signal and we set limits on the DM-induced isotropic gamma-ray signal. Our limits are competitive for DM particle masses up to tens of TeV and, indeed, are the strongest limits derived from Fermi LAT data at TeV energies. This is possible thanks to the new Fermi LAT IGRB measurement, which now extends up to an energy of 820 GeV. As a result, we quantify uncertainties in detail and show the potential this type of search offers for testing the WIMP paradigm with a complementary and truly cosmological probe of DM particle signals.

  6. Vortex lattices in a rotating Fermi superfluid in the BCS-BEC crossover with many Landau levels

    SciTech Connect (OSTI)

    Song, Tie-ling; Ma, C.R.; Ma, Yong-li

    2012-08-15

    We present an explicit analytical analysis of the ground state of vortex lattice structure, based on a minimization of the generalized Gross-Pitaevskii energy functional in a trapped rotating Fermi superfluid gas. By a Bogoliubov-like transformation we find that the coarse-grained average of the atomic density varies as inverted parabola in three dimensional cases; the Fermi superfluid in the BEC regime enters into the lowest Landau level at fast rotation, in which the vortices form an almost regular triangular lattice over a central region and the vortex lattice is expanded along the radial direction in the outer region; the fluid in the unitarity and BCS regimes occupies many low-lying Landau levels, in which a trapped gas with a triangular vortex lattice has a superfluid core surrounded by a normal gas. The calculation is qualitatively consistent with recent numerical and experimental data both in the vortex lattice structure and vortex numbers and in the density profiles versus the stirring frequency in the whole BCS-BEC crossover. - Highlights: Black-Right-Pointing-Pointer We present an analysis of vortex lattice in an interacting trapped rotating Fermi superfluid gas. Black-Right-Pointing-Pointer Decomposing the vortex from the condensate, we can explain the vortex lattice. Black-Right-Pointing-Pointer The calculation is consistent with numerical and experimental data. Black-Right-Pointing-Pointer It can characterize experimentally properties in different regimes of the BCS-BEC crossover.

  7. Examining the Fermi-LAT third source catalog in search of dark matter subhalos

    SciTech Connect (OSTI)

    Bertoni, Bridget; Hooper, Dan; Linden, Tim

    2015-12-17

    Dark matter annihilations taking place in nearby subhalos could appear as gamma-ray sources without detectable counterparts at other wavelengths. In this study, we consider the collection of unassociated gamma-ray sources reported by the Fermi Collaboration in an effort to identify the most promising dark matter subhalo candidates. While we identify 24 bright, high-latitude, non-variable sources with spectra that are consistent with being generated by the annihilations of ~ 20–70 GeV dark matter particles (assuming annihilations to bbar b), it is not possible at this time to distinguish these sources from radio-faint gamma-ray pulsars. Deeper multi-wavelength observations will be essential to clarify the nature of these sources. It is notable that we do not find any such sources that are well fit by dark matter particles heavier than ~100 GeV. We also study the angular distribution of the gamma-rays from this set of subhalo candidates, and find that the source 3FGL J2212.5+0703 prefers a spatially extended profile (of width ~ 0.15°) over that of a point source, with a significance of 4.2σ (3.6σ after trials factor). Although not yet definitive, this bright and high-latitude gamma-ray source is well fit as a nearby subhalo of mχ ≃ 20–50 GeV dark matter particles (annihilating to bb¯) and merits further multi-wavelength investigation. As a result, based on the subhalo distribution predicted by numerical simulations, we derive constraints on the dark matter annihilation cross section that are competitive to those resulting from gamma-ray observations of dwarf spheroidal galaxies, the Galactic Center, and the extragalactic gamma-ray background.

  8. THE INTERPLANETARY NETWORK SUPPLEMENT TO THE FERMI GBM CATALOG OF COSMIC GAMMA-RAY BURSTS

    SciTech Connect (OSTI)

    Hurley, K. [University of California, Berkeley, Space Sciences Laboratory, 7 Gauss Way, Berkeley, CA 94720-7450 (United States); Pal'shin, V. D.; Aptekar, R. L.; Golenetskii, S. V.; Frederiks, D. D.; Mazets, E. P.; Svinkin, D. S. [Ioffe Physical Technical Institute, St. Petersburg 194021 (Russian Federation); Briggs, M. S.; Connaughton, V. [University of Alabama in Huntsville, NSSTC, 320 Sparkman Drive, Huntsville, AL 35805 (United States); Meegan, C. [Universities Space Research Association, NSSTC, 320 Sparkman Drive, Huntsville, AL 35805 (United States); Goldsten, J. [Applied Physics Laboratory, Johns Hopkins University, Laurel, MD 20723 (United States); Boynton, W.; Fellows, C.; Harshman, K. [University of Arizona, Department of Planetary Sciences, Tucson, AZ 85721 (United States); Mitrofanov, I. G.; Golovin, D. V.; Kozyrev, A. S.; Litvak, M. L.; Sanin, A. B. [Space Research Institute, 84/32, Profsoyuznaya, Moscow 117997 (Russian Federation); Rau, A., E-mail: khurley@ssl.berkeley.edu [Max-Planck-Institut fuer extraterrestrische Physik, Giessenbachstrasse, Postfach 1312, D-85748 Garching (Germany); and others

    2013-08-15

    We present Interplanetary Network (IPN) data for the gamma-ray bursts in the first Fermi Gamma-Ray Burst Monitor (GBM) catalog. Of the 491 bursts in that catalog, covering 2008 July 12 to 2010 July 11, 427 were observed by at least one other instrument in the nine-spacecraft IPN. Of the 427, the localizations of 149 could be improved by arrival time analysis (or {sup t}riangulation{sup )}. For any given burst observed by the GBM and one other distant spacecraft, triangulation gives an annulus of possible arrival directions whose half-width varies between about 0.'4 and 32 Degree-Sign , depending on the intensity, time history, and arrival direction of the burst, as well as the distance between the spacecraft. We find that the IPN localizations intersect the 1{sigma} GBM error circles in only 52% of the cases, if no systematic uncertainty is assumed for the latter. If a 6 Degree-Sign systematic uncertainty is assumed and added in quadrature, the two localization samples agree about 87% of the time, as would be expected. If we then multiply the resulting error radii by a factor of three, the two samples agree in slightly over 98% of the cases, providing a good estimate of the GBM 3{sigma} error radius. The IPN 3{sigma} error boxes have areas between about 1 arcmin{sup 2} and 110 deg{sup 2}, and are, on the average, a factor of 180 smaller than the corresponding GBM localizations. We identify two bursts in the IPN/GBM sample that did not appear in the GBM catalog. In one case, the GBM triggered on a terrestrial gamma flash, and in the other, its origin was given as ''uncertain''. We also discuss the sensitivity and calibration of the IPN.

  9. Relativistic Fermi-Ulam map: Application to WEGA stellarator lower hybrid power operation

    SciTech Connect (OSTI)

    Fuchs, V.; Seidl, J.; Krln, L.; Pnek, R.; Preinhaelter, J.; Urban, J.; Laqua, H. P.

    2014-06-15

    Analytical and numerical support is here provided in support of the explanation [Laqua et al., Plasma Phys. Controlled Fusion 56, 075022 (2014)] for the observation of ?MeV electrons during Lower Hybrid (LH) operation in EC pre-heated plasma at the WEGA stellarator [Otte et al., Nukleonika, 57, 171 (2012)]. In the quoted experiments, LH power from the WEGA TE{sub 11} circular waveguide, 9?cm diameter, un-phased, 2.45?GHz antenna, is radiated into a B???0.5?T, n{sup }{sub e}???5??10{sup 17} 1/m{sup 3} plasma at T{sub e}???10?eV bulk temperature with an EC-generated 50?keV population of electrons. In response, the fast electrons travel around flux or drift surfaces essentially without collisions, repeatedly interacting with the rf field close to the antenna mouth, and gaining energy in the process. Our WEGA antenna calculations indicate a predominantly standing electric field pattern at the antenna mouth. From a simple approximation of the corresponding Hamiltonian equations of motion, we derive here a relativistic generalization of the simplified area-preserving Fermi-Ulam (F-U) map [M. A. Lieberman and A. J. Lichtenberg, Phys. Rev. A 5, 1852 (1972), Lichtenberg et al., Physica D 1, 291 (1980)], allowing phase-space global stochasticity analysis. At typical WEGA plasma and antenna conditions, and with correlated phases between electronantenna electric field interaction events, the F-U map and supporting numerical simulations predict an absolute energy barrier in the range of 300?keV. In contrast, with random phases intervening between interaction events, the electron energy can reach ?MeV values, compatible with the measurements on WEGA [Laqua et al., Plasma Phys. Controlled Fusion 56, 075022 (2014)].

  10. Brightest Fermi-LAT flares of PKS 1222+216: implications on emission and acceleration processes

    SciTech Connect (OSTI)

    Kushwaha, Pankaj; Singh, K. P.; Sahayanathan, Sunder

    2014-11-20

    We present a high time resolution study of the two brightest ?-ray outbursts from a blazar PKS 1222+216 observed by the Fermi Large Area Telescope (LAT) in 2010. The ?-ray light curves obtained in four different energy bands, 0.1-3, 0.1-0.3, 0.3-1, and 1-3 GeV, with time bins of six hours, show asymmetric profiles with similar rise times in all the bands but a rapid decline during the April flare and a gradual one during the June flare. The light curves during the April flare show an ?2 day long plateau in 0.1-0.3 GeV emission, erratic variations in 0.3-1 GeV emission, and a daily recurring feature in 1-3 GeV emission until the rapid rise and decline within a day. The June flare shows a monotonic rise until the peak, followed by a gradual decline powered mainly by the multi-peak 0.1-0.3 GeV emission. The peak fluxes during both the flares are similar except in the 1-3 GeV band in April, which is twice the corresponding flux during the June flare. Hardness ratios during the April flare indicate spectral hardening in the rising phase followed by softening during the decay. We attribute this behavior to the development of a shock associated with an increase in acceleration efficiency followed by its decay leading to spectral softening. The June flare suggests hardening during the rise followed by a complicated energy dependent behavior during the decay. Observed features during the June flare favor multiple emission regions while the overall flaring episode can be related to jet dynamics.

  11. Examining the Fermi-LAT third source catalog in search of dark matter subhalos

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

    Bertoni, Bridget; Hooper, Dan; Linden, Tim

    2015-12-17

    Dark matter annihilations taking place in nearby subhalos could appear as gamma-ray sources without detectable counterparts at other wavelengths. In this study, we consider the collection of unassociated gamma-ray sources reported by the Fermi Collaboration in an effort to identify the most promising dark matter subhalo candidates. While we identify 24 bright, high-latitude, non-variable sources with spectra that are consistent with being generated by the annihilations of ~ 20–70 GeV dark matter particles (assuming annihilations to bbar b), it is not possible at this time to distinguish these sources from radio-faint gamma-ray pulsars. Deeper multi-wavelength observations will be essential tomore » clarify the nature of these sources. It is notable that we do not find any such sources that are well fit by dark matter particles heavier than ~100 GeV. We also study the angular distribution of the gamma-rays from this set of subhalo candidates, and find that the source 3FGL J2212.5+0703 prefers a spatially extended profile (of width ~ 0.15°) over that of a point source, with a significance of 4.2σ (3.6σ after trials factor). Although not yet definitive, this bright and high-latitude gamma-ray source is well fit as a nearby subhalo of mχ ≃ 20–50 GeV dark matter particles (annihilating to bb¯) and merits further multi-wavelength investigation. As a result, based on the subhalo distribution predicted by numerical simulations, we derive constraints on the dark matter annihilation cross section that are competitive to those resulting from gamma-ray observations of dwarf spheroidal galaxies, the Galactic Center, and the extragalactic gamma-ray background.« less

  12. Fermi monitoring of radio-loud narrow-line Seyfert 1 galaxies

    SciTech Connect (OSTI)

    Paliya, Vaidehi S.; Stalin, C. S.; Ravikumar, C. D.

    2015-02-01

    We present detailed analysis of the γ-ray flux variability and spectral properties of the five radio-loud narrow line Seyfert 1 (RL-NLSy1) galaxies, detected by the Large Area Telescope on board the Fermi Gamma-Ray Space Telescope, namely 1H 0323+342, SBS 0846+513, PMN J0948+0022, PKS 1502+036, and PKS 2004−447. The first three sources show significant flux variations, including the rapid variability of a few hours by 1H 0323+342. The average γ-ray spectrum of 1H 0323+342 and PMN J0948+0022 shows deviation from a simple power-law (PL) behavior, whereas the PL model gives a better fit for the other three sources. The spectra of 1H 0323+342, SBS 0846+513, and PMN J0948+0022, which are in low, flaring, and moderately active states, respectively, show significant curvature. Such curvature in the γ-ray spectrum of 1H 0323+342 and PMN J0948+0022 could be due to the emission region located inside the broad line region (BLR) where the primary mechanism of the γ-ray emission is inverse-Compton (IC) scattering of BLR photons occurring in the Klein–Nishina regime. The γ-ray emission of SBS 0846+513 is explained by IC scattering of dusty torus photons, which puts the emission region outside the BLR and thus under the Thomson regime. Therefore, the observed curvature of SBS 0846+513 could be intrinsic to the particle energy distribution. The presence of curvature in the γ-ray spectrum and flux variability amplitudes of some of the RL-NLSy1 galaxies suggests that these sources could be akin to low/moderate jet power flat spectrum radio quasars.

  13. The Search for High Energy Extended Emission by Fermi-LAT from Swift-Localized Gamma-Ray Bursts

    SciTech Connect (OSTI)

    Chiang, J.; /Stanford U., HEPL /SLAC; Racusin, J.L.; /NASA, Goddard

    2012-05-01

    The brighter Fermi-LAT bursts have exhibited emission at energies >0.1 GeV that persists as late as {approx}2 ks after the prompt phase has nominally ended. This so-called 'extended emission' could arise from continued activity of the prompt burst mechanism or it could be the start of a high energy afterglow component. The high energy extended emission seen by the LAT has typically followed a t{sup -}{gamma} power-law temporal decay where {gamma} {approx} 1.2-1.7 and has shown no strong indication of spectral evolution. In contrast, the prompt burst emission generally displays strong spectral variability and more complex temporal changes in the LAT band. This differing behavior suggests that the extended emission likely corresponds to an early afterglow phase produced by an external shock. In this study, we look for evidence of high energy extended emission from 145 Swift-localized GRBs that have occurred since the launch of Fermi. A majority of these bursts were either outside of the LAT field-of-view or were otherwise not detected by the LAT during the prompt phase. However, because of the scanning operation of the Fermi satellite, the long-lived extended emission of these bursts may be detectable in the LAT data on the {approx}few ks time scale. We will look for emission from individual bursts and will perform a stacking analysis in order to set bounds on this emission for the sample as a whole. The detection of such emission would have implications for afterglow models and for the overall energy budget of GRBs.

  14. Direct observation of Fermi surface in YBa sub 2 Cu sub 3 O sub 7 minus. delta

    SciTech Connect (OSTI)

    Haghighi, H.; Kaiser, J.H.; Rayner, S.; West, R.N.; Liu, J.Z.; Shelton, R.; Howell, R.H.; Solal, F.; Fluss, M.J. University of California at Davis, Davis, California 95616 Lawrence Livermore National Laboratory, Livermore, California 94550 )

    1991-07-15

    We have performed a high-precision measurement (5{times}10{sup 8} coincidence counts) of the basal-plane electron-positron momentum density in well oxygenated, twin-free, single crystals of YBa{sub 2}Cu{sub 3}O{sub 7{minus}{delta}}. The raw, processed, and {bold K}-space reduced spectra unambiguously show a clear image of a major Fermi surface sheet. The form and profile of that image are in substantial quantitative agreement with theoretical predictions of a {Gamma}-{ital X} electron ridge section associated with states in the CuO chains.

  15. Technical Design and Optimization Study for the FERMI@Elettra FELPhotoinjector

    SciTech Connect (OSTI)

    Lidia, Steven M.; Penco, Giuseppe; Trovo', Mauro

    2006-06-30

    The FERMI {at} Elettra FEL project will provide a novel, x-ray free electron laser user facility at Sincrotrone Trieste based on seeded and cascade FEL techniques. The electron beam source and injector systems play a crucial role in the success of the facility by providing the highest quality electron beams to the linac and FEL undulators. This Technical Note examines the critical technology components that make up the injector system, and demonstrates optimum beam dynamics solutions to achieve the required high quality electron beams. Section 2 provides an overview of the various systems and subsystems that comprise the photoinjector. The different operating modes of the injector are described as they pertain to the different linac configurations driven by the FEL and experimental design. For each mode, the required electron beam parameters are given. Sections 3 and 4 describe the critical beamline elements in the injector complex: the photocathode and drive laser, and the RF gun. The required drive laser parameters are given at the end of Section 3. Additional details on the design of the photoinjector drive laser systems are presented in a separate Technical Note. Design considerations for the RF gun are extensively presented in Section 4. There, we describe the variation of the cavity geometry to optimize the efficiency of the energy transfer to the electron beam. A study of the power coupling into the various cavity modes that interact within the bandwidth of the RF drive pulse is presented, followed by a study of the transient cavity response under several models and, finally, the effects on extracted beam quality. Section 5 describes the initial design for the low energy, off-axis diagnostic beamline. Beam dynamics simulations using ASTRA, elegant, and MAD are presented. Section 6 presents the optimization studies for the beam dynamics in the various operating modes. The optimized baseline configurations for the beamline and incident drive laser pulse are presented, supported by simulation results from space-charge tracking codes. Optimization of the beam transport through the downstream linac to the FEL undulator entrance requires significant deviations from the canonical ''flat-top'' temporal laser pulse distribution at the photocathode. The physics of nonlinear electron current emission are examined to determine the optimum temporal profile of the drive laser in order to produce the required linear current ramp at the injector exit. Parametric sensitivity studies are performed around the baseline configurations, and jitter studies are presented that analyze the stability of the solutions.

  16. Fermi level control of compensating point defects during metalorganic chemical vapor deposition growth of Si-doped AlGaN

    SciTech Connect (OSTI)

    Bryan, Z; Bryan, I; Gaddy, BE; Reddy, P; Hussey, L; Bobea, M; Guo, W; Hoffmann, M; Kirste, R; Tweedie, J; Gerhold, M; Irving, DL; Sitar, Z; Collazo, R

    2014-12-01

    A Fermi-level control scheme for point defect management using above-bandgap UV illumination during growth is presented. We propose an extension to the analogy between the Fermi level and the electrochemical potential such that the electrochemical potential of a charged defect in a material with steady-state populations of free charge carriers may be expressed in terms of the quasi-Fermi levels. A series of highly Si-doped Al0.65Ga0.35N films grown by metalorganic chemical vapor deposition with and without UV illumination showed that samples grown under UV illumination had increased free carrier concentration, free carrier mobility, and reduced midgap photoluminescence all indicating a reduction in compensating point defects. (c) 2014 AIP Publishing LLC.

  17. Direct, experimental evidence of the Fermi surface in YBa sub 2 Cu sub 3 O sub 7-x

    SciTech Connect (OSTI)

    Haghighi, H.; Kaiser, J.H.; Rayner, S.L.; West, R.N. ); Liu, J.Z.; Shelton, R. ); Howell, R.H.; Sterne, P.A.; Solal, F.; Fluss, M.J. )

    1991-04-29

    We report new measurements of the electron-positron momentum spectra of YBa{sub 2}Cu{sub 3}O{sub 7-x} performed with ultra-high statistical precision. These data differ from previous results in two significant respects: They show the D{sub 2} symmetry appropriate for untwinned crystals and, more importantly, they show unmistakable, statistically significant, discontinuities that are evidence of a major Fermi surface section. These results provide a partial answer to a question of special significance to the study of high temperature superconductors i.e. the distribution of the electrons in the material, the electronic structure. Special consideration has been given both experimentally and theoretically to the existence and shape of a Fermi surface in the materials and to the superconducting gap. There are only three experimental techniques that can provide details of the electronic structure at useful resolutions. They are angular correlation of positron annihilation radiation, ACAR, angle resolved photo emission, PE, and de Haas van Alphen measurements. 11 refs., 4 figs.

  18. Fermi-LAT γ-ray anisotropy and intensity explained by unresolved radio-loud active galactic nuclei

    SciTech Connect (OSTI)

    Mauro, Mattia Di; Cuoco, Alessandro; Donato, Fiorenza; Siegal-Gaskins, Jennifer M. E-mail: alessandro.cuoco@to.infn.it E-mail: jsg@tapir.caltech.edu

    2014-11-01

    Radio-loud active galactic nuclei (AGN) are expected to contribute substantially to both the intensity and anisotropy of the isotropic γ-ray background (IGRB). In turn, the measured properties of the IGRB can be used to constrain the characteristics of proposed contributing source classes. We consider individual subclasses of radio-loud AGN, including low-, intermediate-, and high-synchrotron-peaked BL Lacertae objects, flat-spectrum radio quasars, and misaligned AGN. Using updated models of the γ-ray luminosity functions of these populations, we evaluate the energy-dependent contribution of each source class to the intensity and anisotropy of the IGRB. We find that collectively radio-loud AGN can account for the entirety of the IGRB intensity and anisotropy as measured by the Fermi Large Area Telescope (LAT). Misaligned AGN provide the bulk of the measured intensity but a negligible contribution to the anisotropy, while high-synchrotron-peaked BL Lacertae objects provide the dominant contribution to the anisotropy. In anticipation of upcoming measurements with the Fermi-LAT and the forthcoming Cherenkov Telescope Array, we predict the anisotropy in the broader energy range that will be accessible to future observations.

  19. Finite range and upper branch effects on itinerant ferromagnetism in repulsive Fermi gases: BetheGoldstone ladder resummation approach

    SciTech Connect (OSTI)

    He, Lianyi

    2014-12-15

    We investigate the ferromagnetic transition in repulsive Fermi gases at zero temperature with upper branch and effective range effects. Based on a general effective Lagrangian that reproduces precisely the two-body s-wave scattering phase shift, we obtain a nonperturbative expression of the energy density as a function of the polarization by using the BetheGoldstone ladder resummation. For hard sphere potential, the predicted critical gas parameter k{sub F}a=0.816 and the spin susceptibility agree well with the results from fixed-node diffusion Monte Carlo calculations. In general, positive and negative effective ranges have opposite effects on the critical gas parameter k{sub F}a: While a positive effective range reduces the critical gas parameter, a negative effective range increases it. For attractive potential or Feshbach resonance model, the many-body upper branch exhibits an energy maximum at k{sub F}a=? with ?=1.34 from the BetheGoldstone ladder resummation, which is qualitatively consistent with experimental results. The many-body T-matrix has a positive-energy pole for k{sub F}a>? and it becomes impossible to distinguish the bound state and the scattering state. These positive-energy bound states become occupied and therefore the upper branch reaches an energy maximum at k{sub F}a=?. In the zero range limit, there exists a narrow window (0.86Fermi gas. - Highlights: Nonperturbative interaction energy is obtained within the BetheGoldstone ladder resummation approach. Positive and negative effective ranges have opposite effects on the critical gas parameter. The upper branch Fermi gas exhibits an energy maximum and reentrant ferromagnetic transition. The ferromagnetic phase disappears for large and negative effective ranges.

  20. The Enrico Fermi Award Homepage | U.S. DOE Office of Science (SC)

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

    The Energy Department Feeds Families The Energy Department Feeds Families August 13, 2015 - 2:35pm Addthis Oak Ridge Integrated Support Center employees Josh Clark (from left), Steve Martin, Katelynn Prutsman, Tom Rizzi and Hailey Beeler gave employees ice cream from a make-shift "ice cream truck" in exchange for non-perishable items. They even dressed the part! | Photo courtesy of Oak Ridge Integrated Support Center. Oak Ridge Integrated Support Center employees Josh Clark (from

  1. Search for gamma-ray-emitting active galactic nuclei in the Fermi-LAT unassociated sample using machine learning

    SciTech Connect (OSTI)

    Doert, M.; Errando, M. E-mail: errando@astro.columbia.edu

    2014-02-10

    The second Fermi-LAT source catalog (2FGL) is the deepest all-sky survey available in the gamma-ray band. It contains 1873 sources, of which 576 remain unassociated. Machine-learning algorithms can be trained on the gamma-ray properties of known active galactic nuclei (AGNs) to find objects with AGN-like properties in the unassociated sample. This analysis finds 231 high-confidence AGN candidates, with increased robustness provided by intersecting two complementary algorithms. A method to estimate the performance of the classification algorithm is also presented, that takes into account the differences between associated and unassociated gamma-ray sources. Follow-up observations targeting AGN candidates, or studies of multiwavelength archival data, will reduce the number of unassociated gamma-ray sources and contribute to a more complete characterization of the population of gamma-ray emitting AGNs.

  2. Schottky barrier height reduction for holes by Fermi level depinning using metal/nickel oxide/silicon contacts

    SciTech Connect (OSTI)

    Islam, Raisul, E-mail: raisul@stanford.edu; Shine, Gautam; Saraswat, Krishna C. [Department of Electrical Engineering, Stanford University, Stanford, California 94305 (United States)

    2014-11-03

    We report the experimental demonstration of Fermi level depinning using nickel oxide (NiO) as the insulator material in metal-insulator-semiconductor (M-I-S) contacts. Using this contact, we show less than 0.1?eV barrier height for holes in platinum/NiO/silicon (Pt/NiO/p-Si) contact. Overall, the pinning factor was improved from 0.08 (metal/Si) to 0.26 (metal/NiO/Si). The experimental results show good agreement with that obtained from theoretical calculation. NiO offers high conduction band offset and low valence band offset with Si. By reducing Schottky barrier height, this contact can be used as a carrier selective contact allowing hole transport but blocking electron transport, which is important for high efficiency in photonic applications such as photovoltaics and optical detectors.

  3. Quantum Monte Carlo Study of the Ground-State Properties of a Fermi Gas in the BCS-BEC Crossover

    SciTech Connect (OSTI)

    Giorgini, S.; Astrakharchik, G. E.; Boronat, J.; Casulleras, J.

    2006-11-07

    The ground-state properties of a two-component Fermi gas with attractive short-range interactions are calculated using the fixed-node diffusion Monte Carlo method. The interaction strength is varied over a wide range by tuning the value of the s-wave scattering length of the two-body potential. We calculate the ground-state energy per particle and we characterize the equation of state of the system. Off-diagonal long-range order is investigated through the asymptotic behavior of the two-body density matrix. The condensate fraction of pairs is calculated in the unitary limit and on both sides of the BCS-BEC crossover.

  4. Pd/Cu Site Interchange and Non-Fermi-Liquid Behavior in UCu{sub 4}Pd

    SciTech Connect (OSTI)

    Booth, C.H.; MacLaughlin, D.E.; Heffner, R.H.; Kwei, G.H. [Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)] [Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); MacLaughlin, D.E. [Department of Physics, University of California, Riverside, California 92521 (United States)] [Department of Physics, University of California, Riverside, California 92521 (United States); Chau, R.; Maple, M.B. [Department of Physics, University of California, San Diego, California 92093 (United States)] [Department of Physics, University of California, San Diego, California 92093 (United States)

    1998-11-01

    X-ray-absorption fine-structure measurements of the local structure in UCu{sub 4}Pd are described which indicate a probable lattice-disorder origin for non-Fermi-liquid behavior in this material. Short Pd-Cu distances are observed, consistent with (24{plus_minus}3){percent} of the Pd atoms occupying nominally Cu sites. A {open_quotes}Kondo disorder{close_quotes} model, based on the effect on the local Kondo temperature T{sub K} of this interchange and some additional bond-length disorder, agrees quantitatively with previous experimental susceptibility data, and therefore also with specific heat and magnetic resonance experiments. {copyright} {ital 1998} {ital The American Physical Society }

  5. THE SECOND STAGE OF FERMI@ELETTRA: A SEEDED FEL IN THE SOFT X-RAY SPECTRAL RANGE

    SciTech Connect (OSTI)

    Allaria, E.; DeNinno, G.; Fawley, W. M.

    2009-08-14

    The second stage of the FERMI FEL, named FEL-2, is based on the principle of high-gain harmonic generation and relies on a double-seeded cascade. Recent developments stimulated a revision of the original setup, which was designed to cover the spectral range between 40 and 10 nm. The numerical simulations we present here show that the nominal (expected) electron-beam performance allows extension of the FEL spectral range down to 4 nm. A significant amount of third harmonic power can be also expected. We also show that the proposed setup is flexible enough for exploiting future developments of new seed sources, e.g., high harmonic generation in gases.

  6. The Spectrum of the Isotropic Diffuse Gamma-Ray Emission Derived From First-Year Fermi Large Area Telescope Data

    SciTech Connect (OSTI)

    Abdo, A. A.

    2011-08-19

    We report on the first Fermi Large Area Telescope (LAT) measurements of the so-called 'extra-galactic' diffuse {gamma}-ray emission (EGB). This component of the diffuse {gamma}-ray emission is generally considered to have an isotropic or nearly isotropic distribution on the sky with diverse contributions discussed in the literature. The derivation of the EGB is based on detailed modelling of the bright foreground diffuse Galactic {gamma}-ray emission (DGE), the detected LAT sources and the solar {gamma}-ray emission. We find the spectrum of the EGB is consistent with a power law with differential spectral index {gamma} = 2.41 {+-} 0.05 and intensity, I(> 100 MeV) = (1.03 {+-} 0.17) x 10{sup -5} cm{sup -2} s{sup -1} sr{sup -1}, where the error is systematics dominated. Our EGB spectrum is featureless, less intense, and softer than that derived from EGRET data.

  7. Van der Waals Metal-Semiconductor Junction: Weak Fermi Level Pinning Enables Effective Tuning of Schottky Barrier

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

    Liu, Yuanyue; Stradins, Paul; Wei, Su-Huai

    2016-04-01

    Two-dimensional (2D) semiconductors have shown great potential for electronic and optoelectronic applications. However, their development is limited by a large Schottky barrier (SB) at the metal-semiconductor junction (MSJ), which is difficult to tune by using conventional metals because of the effect of strong Fermi level pinning (FLP). We show that this problem can be overcome by using 2D metals, which are bounded with 2D semiconductors through van der Waals (vdW) interactions. This success relies on a weak FLP at the vdW MSJ, which is attributed to the suppression of metal-induced gap states. Consequently, the SB becomes tunable and can vanishmore » with proper 2D metals (for example, H-NbS2). This work not only offers new insights into the fundamental properties of heterojunctions but also uncovers the great potential of 2D metals for device applications.« less

  8. Finite range and upper branch effects on itinerant ferromagnetism in repulsive Fermi gases: Bethe–Goldstone ladder resummation approach

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

    He, Lianyi

    2014-09-19

    In this study, we investigate the ferromagnetic transition in repulsive Fermi gases at zero temperature with upper branch and effective range effects. Based on a general effective Lagrangian that reproduces precisely the two-body ss-wave scattering phase shift, we obtain a nonperturbative expression of the energy density as a function of the polarization by using the Bethe–Goldstone ladder resummation. For hard sphere potential, the predicted critical gas parameter kFa = 0.816 and the spin susceptibility agree well with the results from fixed-node diffusion Monte Carlo calculations. In general, positive and negative effective ranges have opposite effects on the critical gas parametermore » kFa: While a positive effective range reduces the critical gas parameter, a negative effective range increases it. For attractive potential or Feshbach resonance model, the many-body upper branch exhibits an energy maximum at kFa = α with α = 1.34 from the Bethe–Goldstone ladder resummation, which is qualitatively consistent with experimental results. The many-body T-matrix has a positive-energy pole for kFa > α and it becomes impossible to distinguish the bound state and the scattering state. These positive-energy bound states become occupied and therefore the upper branch reaches an energy maximum at kFa = α. In the zero range limit, there exists a narrow window (0.86< kFa < 1.56) for the ferromagnetic phase. At sufficiently large negative effective range, the ferromagnetic phase disappears. On the other hand, the appearance of positive-energy bound state resonantly enhances the two-body decay rate around kFa = α and may prevent the study of equilibrium phases and ferromagnetism of the upper branch Fermi gas.« less

  9. Awards

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

    awards NETL On-site Research Awards and Recognition R&D 100 Awards 2013 Awards & Recognition 2012 Awards & Recognition 2011 Awards & Recognition 2010 Awards & Recognition 2009 Awards & Recognition 2008 Awards & Recognition R&D 100 Awards 2013 Arc Position Sensing Technology BlackGold® Nanocoating 2012 Basic Immobilized Amine Sorbent (BIAS) Process for CO2 Capture 2011 APECS v2.0 with ANSYS® DesignXplorerTM and ROM Builder Radio Opaque Medical Stent Material

  10. Observation of an electron band above the Fermi level in FeTe{sub 0.55}Se{sub 0.45} from in-situ surface doping

    SciTech Connect (OSTI)

    Zhang, P.; Ma, J.; Qian, T.; Richard, P. Ding, H.; Xu, N.; Xu, Y.-M.; Fedorov, A. V.; Denlinger, J. D.; Gu, G. D.

    2014-10-27

    We used in-situ potassium (K) evaporation to dope the surface of the iron-based superconductor FeTe{sub 0.55}Se{sub 0.45}. The systematic study of the bands near the Fermi level confirms that electrons are doped into the system, allowing us to tune the Fermi level of this material and to access otherwise unoccupied electronic states. In particular, we observe an electron band located above the Fermi level before doping that shares similarities with a small three-dimensional pocket observed in the cousin, heavily electron-doped KFe{sub 2?x}Se{sub 2} compound.

  11. FINAL–REPORT NO. 2: INDEPENDENT CONFIRMATORY SURVEY SUMMARY AND RESULTS FOR THE ENRICO FERMI ATOMIC POWER PLANT, UNIT 1, NEWPORT, MICHIGAN (DOCKET NO. 50 16; RFTA 10-004)

    SciTech Connect (OSTI)

    Erika Bailey

    2011-07-07

    The Enrico Fermi Atomic Power Plant, Unit 1 (Fermi 1) was a fast breeder reactor design that was cooled by sodium and operated at essentially atmospheric pressure. On May 10, 1963, the Atomic Energy Commission (AEC) granted an operating license, DPR-9, to the Power Reactor Development Company (PRDC), a consortium specifically formed to own and operate a nuclear reactor at the Fermi 1 site. The reactor was designed for a maximum capability of 430 megawatts (MW); however, the maximum reactor power with the first core loading (Core A) was 200 MW. The primary system was filled with sodium in December 1960 and criticality was achieved in August 1963.

  12. Awards

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

    Awards Print banner Home Agenda Awards Exhibitors Lodging Posters Registration Transportation Workshops Contact Us User Meeting Archives Users' Executive Committee ALS User Meeting...

  13. Nodal to nodeless superconducting energy gap structure change concomitant with Fermi surface reconstruction in the heavy-fermion CeCoIn?

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

    Kim, Hyunsoo; Petrovic, C.; Tanatar, M. A.; Flint, R.; Hu, Rongwei; White, B. D.; Lum, I. K.; Maple, M. B.; Prozorov, R.

    2015-01-15

    The London penetration depth ?(T) was measured in single crystals of Ce1xRxCoIn?, R=La, Nd, and Yb down to Tmin ? 50 mK (Tc/Tmin ~50) using a tunnel-diode resonator. In the cleanest samples ??(T) is best described by the power law, ??(T) ? Tn, with n ~ 1, consistent with line nodes. Substitutions of Ce with La, Nd, and Yb lead to similar monotonic suppressions of Tc, however, the effects on ??(T) differ. While La and Nd dopings lead to increase of the exponent n and saturation at n ~ 2, as expected for a dirty nodal superconductor, Yb doping leadsmoreto n > 3, suggesting a change from nodal to nodeless superconductivity. This superconducting gap structure change happens in the same doping range where changes of the Fermi surface topology were reported, implying that the nodal structure and Fermi surface topology are closely linked.less

  14. The electron-positron momentum density and Fermi surface of YBa{sub 2}Cu{sub 3}O{sub 7-x}

    SciTech Connect (OSTI)

    Haghighi, H.; Kaiser, J.H.; Rayner, S.; West, R.N.; Liu, J.Z.; Shelton, R.; Howell, R.H.; Solal, F.; Sterne, P.A.; Fluss, M.J.

    1991-10-11

    The search for evidence of Fermi surface in the cuprate high temperature superconductors has provided the greatest challenge for the 2D ACAR technique thus far in its relatively short history. Much of the effort in both theory and experiment has focused on the Yttrium compound where the small size of samples, twinning and structural oxygen defects have made the experiments difficult, complicated the interpretation of results and led to some confusion. With the advent of good twin-free crystals that confusion has now been resolved. In this paper we shall briefly review the earlier experiments on twinned crystals and then describe in more detail, and in the context of the contemporary bandstructure theory, our recent clear resolution of a major Fermi surface section in untwinned crystals of YBa{sub 2}Cu{sub 3}O{sub 7-x}.

  15. NEW FERMI-LAT EVENT RECONSTRUCTION REVEALS MORE HIGH-ENERGY GAMMA RAYS FROM GAMMA-RAY BURSTS

    SciTech Connect (OSTI)

    Atwood, W. B.; Baldini, L.; Bregeon, J.; Pesce-Rollins, M.; Sgro, C.; Tinivella, M.; Bruel, P.; Cohen-Tanugi, J.; Granot, J.; Longo, F.; Razzaque, S.; Zimmer, S. E-mail: nicola.omodei@stanford.edu

    2013-09-01

    Based on the experience gained during the four and a half years of the mission, the Fermi-LAT Collaboration has undertaken a comprehensive revision of the event-level analysis going under the name of Pass 8. Although it is not yet finalized, we can test the improvements in the new event reconstruction with the special case of the prompt phase of bright gamma-ray bursts (GRBs), where the signal-to-noise ratio is large enough that loose selection cuts are sufficient to identify gamma rays associated with the source. Using the new event reconstruction, we have re-analyzed 10 GRBs previously detected by the Large Area Telescope (LAT) for which an X-ray/optical follow-up was possible and found four new gamma rays with energies greater than 10 GeV in addition to the seven previously known. Among these four is a 27.4 GeV gamma ray from GRB 080916C, which has a redshift of 4.35, thus making it the gamma ray with the highest intrinsic energy ({approx}147 GeV) detected from a GRB. We present here the salient aspects of the new event reconstruction and discuss the scientific implications of these new high-energy gamma rays, such as constraining extragalactic background light models, Lorentz invariance violation tests, the prompt emission mechanism, and the bulk Lorentz factor of the emitting region.

  16. Fermi-LAT Discovery of GeV Gamma-ray Emission from the Young Supernova Remnant Cassiopeia A

    SciTech Connect (OSTI)

    Abdo, A.A.

    2011-08-19

    We report on the first detection of GeV high-energy gamma-ray emission from a young supernova remnant with the Large Area Telescope aboard the Fermi Gamma-ray Space Telescope. These observations reveal a source with no discernible spatial extension detected at a significance level of 12.2{sigma} above 500 MeV at a location that is consistent with the position of the remnant of the supernova explosion that occurred around 1680 in the Cassiopeia constellation - Cassiopeia A. The gamma-ray flux and spectral shape of the source are consistent with a scenario in which the gamma-ray emission originates from relativistic particles accelerated in the shell of this remnant. The total content of cosmic rays (electrons and protons) accelerated in Cas A can be estimated as W{sub CR} {approx_equal} (1-4) x 10{sup 49} erg thanks to the well-known density in the remnant assuming that the observed gamma-ray originates in the SNR shell(s). The magnetic field in the radio-emitting plasma can be robustly constrained as B {ge} 0.1 mG, providing new evidence of the magnetic field amplification at the forward shock and the strong field in the shocked ejecta.

  17. Latent instabilities in metallic LaNiO₃ films by strain control of Fermi-surface topology

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

    Yoo, Hyang Keun; Hyun, Seung Ill; Moreschini, Luca; Kim, Hyeong -Do; Chang, Young Jun; Sohn, Chang Hee; Jeong, Da Woon; Sinn, Soobin; Kim, Yong Su; Bostwick, Aaron; et al

    2015-03-04

    Strain control is one of the most promising avenues to search for new emergent phenomena in transition metal-oxide films. Here, we investigate the strain-induced changes of electronic structures in strongly correlated LaNiO₃ (LNO) films, using angle-resolved photoemission spectroscopy and the dynamical mean-field theory. The strongly renormalized eg-orbital bands are systematically rearranged by misfit strain to change its fermiology. As tensile strain increases, the hole pocket centered at the A point elongates along the kz-axis and seems to become open, thus changing Fermi-surface (FS) topology from three- to quasi-two-dimensional. Concomitantly, the FS shape becomes flattened to enhance FS nesting. A FSmore » superstructure withQ₁ = (1/2,1/2,1/2) appears in all LNO films, while a tensile-strained LNO film has an additional Q₂ = (1/4,1/4,1/4) modulation, indicating that some instabilities are present in metallic LNO films. Charge disproportionation and spin-density-wave fluctuations observed in other nickelates might be their most probable origins« less

  18. FERMI LARGE AREA TELESCOPE DISCOVERY OF GeV GAMMA-RAY EMISSION FROM THE VICINITY OF SNR W44

    SciTech Connect (OSTI)

    Uchiyama, Yasunobu; Funk, Stefan; Katsuta, Junichiro; Lemoine-Goumard, Marianne; Torres, Diego F.

    2012-04-20

    We report the detection of GeV {gamma}-ray emission from the molecular cloud complex that surrounds the supernova remnant (SNR) W44 using the Large Area Telescope on board Fermi. While the previously reported {gamma}-ray emission from SNR W44 is likely to arise from the dense radio-emitting filaments within the remnant, the {gamma}-ray emission that appears to come from the surrounding molecular cloud complex can be ascribed to the cosmic rays (CRs) that have escaped from W44. The non-detection of synchrotron radio emission associated with the molecular cloud complex suggests the decay of {pi}{sup 0} mesons produced in hadronic collisions as the {gamma}-ray emission mechanism. The total kinetic energy channeled into the escaping CRs is estimated to be W{sub esc} {approx} (0.3-3) Multiplication-Sign 10{sup 50} erg, in broad agreement with the conjecture that SNRs are the main sources of Galactic CRs.

  19. Fermi-level pinning, charge transfer, and relaxation of spin-momentum locking at metal contacts to topological insulators

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

    Spataru, Catalin D.; Léonard, François

    2014-08-13

    Topological insulators are of interest for many applications in electronics and optoelectronics, but harnessing their unique properties requires detailed understanding and control of charge injection at electrical contacts. Here we present large-scale ab initio calculations of the electronic properties of Au, Ni, Pt, Pd, and graphene contacts to Bi2Se3. We show that regardless of the metal, the Fermi level is located in the conduction band, leading to n-type Ohmic contact to the first quintuplet. Furthermore, we find strong charge transfer and band-bending in the first few quintuplets, with no Schottky barrier for charge injection even when the topoplogical insulator ismore » undoped. Our calculations indicate that Au and graphene leave the spin-momentum locking mostly unaltered, but on the other hand, Ni, Pd, and Pt strongly hybridize with Bi2Se3 and relax spin-momentum locking. In conclusion, our results indicate that judicious choice of the contact metal is essential to reveal the unique surface features of topological insulators.« less

  20. A tale of tails. Dark matter interpretations of the Fermi GeV excess in light of background model systematics

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

    Calore, Francesca; Cholis, Ilias; McCabe, Christopher; Weniger, Christoph

    2015-03-10

    Several groups have identified an extended excess of gamma rays over the modeled foreground and background emissions towards the Galactic center (GC) based on observations with the Fermi Large Area Telescope. This excess emission is compatible in morphology and spectrum with a telltale sign from dark matter (DM) annihilation. Here, we present a critical reassessment of DM interpretations of the GC signal in light of the foreground and background uncertainties that some of us recently outlaid in Calore et al. (2014). We find that a much larger number of DM models fits the gamma-ray data than previously noted. In particular:more(1) In the case of DM annihilation into bb, we find that even large DM masses up to m??74 GeV are allowed at p-value >0.05. (2) Surprisingly, annihilation into nonrelativistic hh gives a good fit to the data. (3) The inverse Compton emission from ?+? with m? ~ 6070 GeV can also account for the excess at higher latitudes, |b|>2, both in its spectrum and morphology. We also present novel constraints on a large number of mixed annihilation channels, including cascade annihilation involving hidden sector mediators. In conclusion, we show that the current limits from dwarf spheroidal observations are not in tension with a DM interpretation when uncertainties on the DM halo profile are accounted for.less

  1. FIVE NEW MILLISECOND PULSARS FROM A RADIO SURVEY OF 14 UNIDENTIFIED FERMI-LAT GAMMA-RAY SOURCES

    SciTech Connect (OSTI)

    Kerr, M.; Camilo, F.; Johnson, T. J.; Ferrara, E. C.; Harding, A. K.; Guillemot, L.; Kramer, M.; Hessels, J.; Johnston, S.; Keith, M.; Reynolds, J. E.; Ransom, S. M.; Ray, P. S.; Wood, K. S.; Sarkissian, J. E-mail: fernando@astro.columbia.edu

    2012-03-20

    We have discovered five millisecond pulsars (MSPs) in a survey of 14 unidentified Fermi Large Area Telescope sources in the southern sky using the Parkes radio telescope. PSRs J0101-6422, J1514-4946, and J1902-5105 reside in binaries, while PSRs J1658-5324 and J1747-4036 are isolated. Using an ephemeris derived from timing observations of PSR J0101-6422 (P = 2.57 ms, DM = 12 pc cm{sup -3}), we have detected {gamma}-ray pulsations and measured its proper motion. Its {gamma}-ray spectrum (a power law of {Gamma} = 0.9 with a cutoff at 1.6 GeV) and efficiency are typical of other MSPs, but its radio and {gamma}-ray light curves challenge simple geometric models of emission. The high success rate of this survey-enabled by selecting {gamma}-ray sources based on their detailed spectral characteristics-and other similarly successful searches indicate that a substantial fraction of the local population of MSPs may soon be known.

  2. Interaction energy and itinerant ferromagnetism in a strongly interacting Fermi gas in the absence of molecule formation

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

    He, Lianyi

    2014-11-26

    In this study, we investigate the interaction energy and the possibility of itinerant ferromagnetism in a strongly interacting Fermi gas at zero temperature in the absence of molecule formation. The interaction energy is obtained by summing the perturbative contributions of Galitskii-Feynman type to all orders in the gas parameter. It can be expressed by a simple phase-space integral of an in-medium scattering phase shift. In both three and two dimensions (3D and 2D), the interaction energy shows a maximum before reaching the resonance from the Bose-Einstein condensate side, which provides a possible explanation of the experimental measurements of the interactionmore » energy. This phenomenon can be theoretically explained by the qualitative change of the nature of the binary interaction in the medium. The appearance of an energy maximum has significant effects on the itinerant ferromagnetism. In 3D, the ferromagnetic transition is reentrant and itinerant ferromagnetism exists in a narrow window around the energy maximum. In 2D, the present theoretical approach suggests that itinerant ferromagnetism does not exist, which reflects the fact that the energy maximum becomes much lower than the energy of the fully polarized state.« less

  3. A Tale of Tails. Dark Matter Interpretations of the Fermi GeV Excess in Light of Background Model Systematics

    SciTech Connect (OSTI)

    Calore, Francesca; Cholis, Ilias; McCabe, Christopher; Weniger, Christoph

    2015-03-10

    Several groups have identified an extended excess of gamma rays over the modeled foreground and background emissions towards the Galactic center (GC) based on observations with the Fermi Large Area Telescope. The excess emission is compatible in morphology and spectrum with a telltale sign from dark matter (DM) annihilation. Here, we present a critical reassessment of DM interpretations of the GC signal in light of the foreground and background uncertainties that some of us recently outlaid in Calore et al. (2014). We also find that a much larger number of DM models fits the gamma-ray data than previously noted. In particular: (1) In the case of DM annihilation into bb, we find that even large DM masses up to m??74 GeV are allowed at p-value >0.05. (2) Surprisingly, annihilation into nonrelativistic hh gives a good fit to the data. (3) The inverse Compton emission from ?+?- with m?~6070 GeV can also account for the excess at higher latitudes, |b|>2, both in its spectrum and morphology. We also present novel constraints on a large number of mixed annihilation channels, including cascade annihilation involving hidden sector mediators. Finally, we show that the current limits from dwarf spheroidal observations are not in tension with a DM interpretation when uncertainties on the DM halo profile are accounted for.

  4. Evidence for a Common Physical Description of Non-Fermi-Liquid Behavior in Chemically Substituted f -Electron Systems

    SciTech Connect (OSTI)

    de Andrade, M.C.; Chau, R.; Dickey, R.P.; Dilley, N.R.; Freeman, E.J.; Gajewski, D.A.; Maple, M.B. [Department of Physics and Institute for Pure and Applied Physical Sciences, University of California, San Diego, La Jolla, California 92093 (United States)] [Department of Physics and Institute for Pure and Applied Physical Sciences, University of California, San Diego, La Jolla, California 92093 (United States); Movshovich, R. [Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)] [Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States); Castro Neto, A.H.; Castilla, G. [Department of Physics, University of California, Riverside, California 92521 (United States)] [Department of Physics, University of California, Riverside, California 92521 (United States); Jones, B.A. [IBM Almaden Research Center, San Jose, California 95120-6099 (United States)] [IBM Almaden Research Center, San Jose, California 95120-6099 (United States)

    1998-12-01

    The non-Fermi-liquid (NFL) behavior observed in the low temperature specific heat C(T) and magnetic susceptibility {chi}(T) of many chemically substituted f -electron systems is analyzed within the context of a recently developed theory based on Griffiths{close_quote} singularities. Measurements of C(T) and {chi}(T) in the systems Th{sub 1{minus}x}U {sub x}Pd{sub 2}Al{sub 3} , Y{sub 1{minus}x}U {sub x}Pd{sub 3} , and UCu{sub 5{minus}x }M{sub x} (M=Pd,thinspPt ) are found to be consistent with C(T)/T{proportional_to}{chi}(T){proportional_to}T{sup {minus}1+{lambda}} predicted by this model with {lambda}{lt}1 in the NFL regime. These results suggest that the NFL properties observed in a wide variety of disordered f -electron systems can be described within the context of a common physical picture. {copyright} {ital 1998} {ital The American Physical Society}

  5. CONSTRAINTS ON THE SYNCHROTRON SHOCK MODEL FOR THE FERMI GRB 090820A OBSERVED BY GAMMA-RAY BURST MONITOR

    SciTech Connect (OSTI)

    Burgess, J. Michael; Preece, Robert D.; Briggs, Michael S.; Connaughton, Valerie; Guiriec, Sylvain; Paciesas, William S.; Bhat, P. N.; Chaplin, Vandiver; Goldstein, Adam; Baring, Matthew G.; Meegan, Charles A.; Bissaldi, Elisabetta; Diehl, Roland; Greiner, Jochen; Gruber, David; Fishman, Gerald J.; Gibby, Melissa; Giles, Misty E-mail: baring@rice.edu

    2011-11-01

    Discerning the radiative dissipation mechanism for prompt emission in gamma-ray bursts (GRBs) requires detailed spectroscopic modeling that straddles the {nu}F{sub {nu}} peak in the 100 keV-1 MeV range. Historically, empirical fits such as the popular Band function have been employed with considerable success in interpreting the observations. While extrapolations of the Band parameters can provide some physical insight into the emission mechanisms responsible for GRBs, these inferences do not provide a unique way of discerning between models. By fitting physical models directly, this degeneracy can be broken, eliminating the need for empirical functions; our analysis here offers a first step in this direction. One of the oldest, and leading, theoretical ideas for the production of the prompt signal is the synchrotron shock model. Here we explore the applicability of this model to a bright Fermi gamma-ray burst monitor (GBM) burst with a simple temporal structure, GRB 090820A. Our investigation implements, for the first time, thermal and non-thermal synchrotron emissivities in the RMFIT forward-folding spectral analysis software often used in GBM burst studies. We find that these synchrotron emissivities, together with a blackbody shape, provide at least as good a match to the data as the Band GRB spectral fitting function. This success is achieved in both time-integrated and time-resolved spectral fits.

  6. A Tale of Tails. Dark Matter Interpretations of the Fermi GeV Excess in Light of Background Model Systematics

    SciTech Connect (OSTI)

    Calore, Francesca; Cholis, Ilias; McCabe, Christopher; Weniger, Christoph

    2015-03-10

    Several groups have identified an extended excess of gamma rays over the modeled foreground and background emissions towards the Galactic center (GC) based on observations with the Fermi Large Area Telescope. The excess emission is compatible in morphology and spectrum with a telltale sign from dark matter (DM) annihilation. Here, we present a critical reassessment of DM interpretations of the GC signal in light of the foreground and background uncertainties that some of us recently outlaid in Calore et al. (2014). We also find that a much larger number of DM models fits the gamma-ray data than previously noted. In particular: (1) In the case of DM annihilation into b¯b, we find that even large DM masses up to mχ≃74 GeV are allowed at p-value >0.05. (2) Surprisingly, annihilation into nonrelativistic hh gives a good fit to the data. (3) The inverse Compton emission from μ+μ- with mχ~60–70 GeV can also account for the excess at higher latitudes, |b|>2°, both in its spectrum and morphology. We also present novel constraints on a large number of mixed annihilation channels, including cascade annihilation involving hidden sector mediators. Finally, we show that the current limits from dwarf spheroidal observations are not in tension with a DM interpretation when uncertainties on the DM halo profile are accounted for.

  7. A Tale of Tails. Dark Matter Interpretations of the Fermi GeV Excess in Light of Background Model Systematics

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

    Calore, Francesca; Cholis, Ilias; McCabe, Christopher; Weniger, Christoph

    2015-03-10

    Several groups have identified an extended excess of gamma rays over the modeled foreground and background emissions towards the Galactic center (GC) based on observations with the Fermi Large Area Telescope. The excess emission is compatible in morphology and spectrum with a telltale sign from dark matter (DM) annihilation. Here, we present a critical reassessment of DM interpretations of the GC signal in light of the foreground and background uncertainties that some of us recently outlaid in Calore et al. (2014). We also find that a much larger number of DM models fits the gamma-ray data than previously noted. Inmore » particular: (1) In the case of DM annihilation into b¯b, we find that even large DM masses up to mχ≃74 GeV are allowed at p-value >0.05. (2) Surprisingly, annihilation into nonrelativistic hh gives a good fit to the data. (3) The inverse Compton emission from μ+μ- with mχ~60–70 GeV can also account for the excess at higher latitudes, |b|>2°, both in its spectrum and morphology. We also present novel constraints on a large number of mixed annihilation channels, including cascade annihilation involving hidden sector mediators. Finally, we show that the current limits from dwarf spheroidal observations are not in tension with a DM interpretation when uncertainties on the DM halo profile are accounted for.« less

  8. Awards

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

    Awards banner Home Agenda Awards Exhibitors Lodging Posters Registration Transportation Workshops Contact Us User Meeting Archives Users' Executive Committee ALS User Meeting Awards The ALS Users' Executive Committee invites ALS users and staff to submit nominations in recognition of the people who have made significant contributions to the scientific and user support programs at the ALS. Nominations may be made for any or all of the following awards by downloading and filling out the form(s) at

  9. THE FERMI-GBM X-RAY BURST MONITOR: THERMONUCLEAR BURSTS FROM 4U 0614+09

    SciTech Connect (OSTI)

    Linares, M.; Chakrabarty, D. [Massachusetts Institute of Technology, Kavli Institute for Astrophysics and Space Research, Cambridge, MA 02139 (United States); Connaughton, V.; Bhat, P. N.; Briggs, M. S.; Preece, R. [CSPAR and Physics Department, University of Alabama in Huntsville, Huntsville, AL 35899 (United States); Jenke, P.; Kouveliotou, C.; Wilson-Hodge, C. A. [Space Science Office, VP62, NASA/Marshall Space Flight Center, Huntsville, AL 35812 (United States); Van der Horst, A. J. [Astronomical Institute 'Anton Pannekoek', University of Amsterdam, NL-1090-GE Amsterdam (Netherlands); Camero-Arranz, A.; Finger, M.; Paciesas, W. S. [Universities Space Research Association, Huntsville, AL 35805 (United States); Beklen, E. [Physics Department, Suleyman Demirel University, 32260 Isparta (Turkey); Von Kienlin, A. [Max Planck Institute for Extraterrestrial Physics, Giessenbachstrasse, Postfach 1312, D-85748 Garching (Germany)

    2012-12-01

    Thermonuclear bursts from slowly accreting neutron stars (NSs) have proven difficult to detect, yet they are potential probes of the thermal properties of the NS interior. During the first year of a systematic all-sky search for X-ray bursts using the Gamma-ray Burst Monitor aboard the Fermi Gamma-ray Space Telescope we have detected 15 thermonuclear bursts from the NS low-mass X-ray binary 4U 0614+09 when it was accreting at nearly 1% of the Eddington limit. We measured an average burst recurrence time of 12 {+-} 3 days (68% confidence interval) between 2010 March and 2011 March, classified all bursts as normal duration bursts and placed a lower limit on the recurrence time of long/intermediate bursts of 62 days (95% confidence level). We discuss how observations of thermonuclear bursts in the hard X-ray band compare to pointed soft X-ray observations and quantify such bandpass effects on measurements of burst radiated energy and duration. We put our results for 4U 0614+09 in the context of other bursters and briefly discuss the constraints on ignition models. Interestingly, we find that the burst energies in 4U 0614+09 are on average between those of normal duration bursts and those measured in long/intermediate bursts. Such a continuous distribution in burst energy provides a new observational link between normal and long/intermediate bursts. We suggest that the apparent bimodal distribution that defined normal and long/intermediate duration bursts during the last decade could be due to an observational bias toward detecting only the longest and most energetic bursts from slowly accreting NSs.

  10. SGR J1550-5418 BURSTS DETECTED WITH THE FERMI GAMMA-RAY BURST MONITOR DURING ITS MOST PROLIFIC ACTIVITY

    SciTech Connect (OSTI)

    Van der Horst, A. J.; Finger, M. H. [Universities Space Research Association, NSSTC, Huntsville, AL 35805 (United States); Kouveliotou, C. [Space Science Office, VP62, NASA/Marshall Space Flight Center, Huntsville, AL 35812 (United States); Gorgone, N. M. [Connecticut College, New London, CT 06320 (United States); Kaneko, Y.; Goegues, E.; Lin, L. [Sabanc Latin-Small-Letter-Dotless-I University, Orhanl Latin-Small-Letter-Dotless-I -Tuzla, Istanbul 34956 (Turkey); Baring, M. G. [Department of Physics and Astronomy, Rice University, MS-108, P.O. Box 1892, Houston, TX 77251 (United States); Guiriec, S.; Bhat, P. N.; Chaplin, V. L.; Goldstein, A. [University of Alabama, Huntsville, CSPAR, Huntsville, AL 35805 (United States); Granot, J. [Racah Institute of Physics, Hebrew University, Jerusalem 91904 (Israel); Watts, A. L. [Astronomical Institute 'Anton Pannekoek', University of Amsterdam, Postbus 94249, 1090 GE Amsterdam (Netherlands); Bissaldi, E.; Gruber, D. [Max Planck Institute for Extraterrestrial Physics, Giessenbachstrasse, Postfach 1312, 85748 Garching (Germany); Gehrels, N.; Harding, A. K. [NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States); Gibby, M. H.; Giles, M. M., E-mail: A.J.VanDerHorst@uva.nl [Jacobs Technology, Inc., Huntsville, AL (United States); and others

    2012-04-20

    We have performed detailed temporal and time-integrated spectral analysis of 286 bursts from SGR J1550-5418 detected with the Fermi Gamma-ray Burst Monitor (GBM) in 2009 January, resulting in the largest uniform sample of temporal and spectral properties of SGR J1550-5418 bursts. We have used the combination of broadband and high time-resolution data provided with GBM to perform statistical studies for the source properties. We determine the durations, emission times, duty cycles, and rise times for all bursts, and find that they are typical of SGR bursts. We explore various models in our spectral analysis, and conclude that the spectra of SGR J1550-5418 bursts in the 8-200 keV band are equally well described by optically thin thermal bremsstrahlung (OTTB), a power law (PL) with an exponential cutoff (Comptonized model), and two blackbody (BB) functions (BB+BB). In the spectral fits with the Comptonized model, we find a mean PL index of -0.92, close to the OTTB index of -1. We show that there is an anti-correlation between the Comptonized E{sub peak} and the burst fluence and average flux. For the BB+BB fits, we find that the fluences and emission areas of the two BB functions are correlated. The low-temperature BB has an emission area comparable to the neutron star surface area, independent of the temperature, while the high-temperature BB has a much smaller area and shows an anti-correlation between emission area and temperature. We compare the properties of these bursts with bursts observed from other SGR sources during extreme activations, and discuss the implications of our results in the context of magnetar burst models.

  11. DISCOVERY OF NINE GAMMA-RAY PULSARS IN FERMI LARGE AREA TELESCOPE DATA USING A NEW BLIND SEARCH METHOD

    SciTech Connect (OSTI)

    Pletsch, H. J.; Allen, B.; Aulbert, C.; Fehrmann, H.; Guillemot, L.; Kramer, M.; Barr, E. D.; Champion, D. J.; Eatough, R. P.; Freire, P. C. C.; Ray, P. S.; Belfiore, A.; Dormody, M.; Camilo, F.; Caraveo, P. A.; Celik, Oe.; Ferrara, E. C.; Hessels, J. W. T.; Keith, M.; Kerr, M. E-mail: guillemo@mpifr-bonn.mpg.de; and others

    2012-01-10

    We report the discovery of nine previously unknown gamma-ray pulsars in a blind search of data from the Fermi Large Area Telescope (LAT). The pulsars were found with a novel hierarchical search method originally developed for detecting continuous gravitational waves from rapidly rotating neutron stars. Designed to find isolated pulsars spinning at up to kHz frequencies, the new method is computationally efficient and incorporates several advances, including a metric-based gridding of the search parameter space (frequency, frequency derivative, and sky location) and the use of photon probability weights. The nine pulsars have spin frequencies between 3 and 12 Hz, and characteristic ages ranging from 17 kyr to 3 Myr. Two of them, PSRs J1803-2149 and J2111+ 4606, are young and energetic Galactic-plane pulsars (spin-down power above 6 Multiplication-Sign 10{sup 35} erg s{sup -1} and ages below 100 kyr). The seven remaining pulsars, PSRs J0106+4855, J0622+3749, J1620-4927, J1746-3239, J2028+3332, J2030+4415, and J2139+4716, are older and less energetic; two of them are located at higher Galactic latitudes (|b| > 10 Degree-Sign ). PSR J0106+4855 has the largest characteristic age (3 Myr) and the smallest surface magnetic field (2 Multiplication-Sign 10{sup 11} G) of all LAT blind-search pulsars. PSR J2139+4716 has the lowest spin-down power (3 Multiplication-Sign 10{sup 33} erg s{sup -1}) among all non-recycled gamma-ray pulsars ever found. Despite extensive multi-frequency observations, only PSR J0106+4855 has detectable pulsations in the radio band. The other eight pulsars belong to the increasing population of radio-quiet gamma-ray pulsars.

  12. MULTI-WAVELENGTH EMISSION FROM THE FERMI BUBBLE. II. SECONDARY ELECTRONS AND THE HADRONIC MODEL OF THE BUBBLE

    SciTech Connect (OSTI)

    Cheng, K.-S.; Chernyshov, D. O.; Dogiel, V. A.; Ko, C.-M.

    2015-01-20

    We analyze the origin of the gamma-ray flux from the Fermi Bubbles (FBs) in the framework of the hadronic model in which gamma-rays are produced by collisions of relativistic protons with the protons of the background plasma in the Galactic halo. It is assumed in this model that the observed radio emission from the FBs is due to synchrotron radiation of secondary electrons produced by pp collisions. However, if these electrons lose their energy through synchrotron and inverse-Compton emission, the spectrum of secondary electrons will be too soft, and an additional arbitrary component of the primary electrons will be necessary in order to reproduce the radio data. Thus, a mixture of the hadronic and leptonic models is required for the observed radio flux. It was shown that if the spectrum of primary electrons is ∝E{sub e}{sup −2}, the permitted range of the magnetic field strength is within the 2-7 μG region. The fraction of gamma-rays produced by pp collisions can reach about 80% of the total gamma-ray flux from the FBs. If the magnetic field is <2 μG or >7 μG the model is unable to reproduce the data. Alternatively, the electrons in the FBs may lose their energy through adiabatic energy losses if there is a strong plasma outflow in the GC. Then, the pure hadronic model is able to reproduce characteristics of the radio and gamma-ray flux from the FBs. However, in this case the required magnetic field strength in the FBs and the power of CR sources are much higher than those following from observations.

  13. Fermi LAT Observation of Diffuse Gamma-Rays Produced through Interactions Between Local Interstellar Matter and High Energy Cosmic Rays

    SciTech Connect (OSTI)

    Abdo, A.A.; Ackermann, M.; Ajello, M.; Atwood, W.B.; Axelsson, M.; Baldini, L.; Ballet, J.; Barbiellini, G.; Bastieri, D.; Baughman, B.M.; Bechtol, K.; Bellazzini, R.; Berenji, B.; Bloom, E.D.; Bonamente, E.; Borgland, A.W.; Bregeon, J.; Brez, A.; Brigida, M.; Bruel, P.; Burnett, T.H.; /more authors..

    2012-03-30

    Observations by the Large Area Telescope (LAT) on the Fermi mission of diffuse {gamma}-rays in a mid-latitude region in the third quadrant (Galactic longitude l from 200{sup o} to 260{sup o} and latitude |b| from 22{sup o} to 60{sup o}) are reported. The region contains no known large molecular cloud and most of the atomic hydrogen is within 1 kpc of the solar system. The contributions of {gamma}-ray point sources and inverse Compton scattering are estimated and subtracted. The residual {gamma}-ray intensity exhibits a linear correlation with the atomic gas column density in energy from 100 MeV to 10 GeV. The measured integrated {gamma}-ray emissivity is (1.63 {+-} 0.05) x 10{sup -26} photons s{sup -1}sr{sup -1} H-atom{sup -1} and (0.66 {+-} 0.02) x 10{sup -26} photons s{sup -1}sr{sup -1} H-atom{sup -1} above 100 MeV and above 300 MeV, respectively, with an additional systematic error of {approx}10%. The differential emissivity from 100 MeV to 10 GeV agrees with calculations based on cosmic ray spectra consistent with those directly measured, at the 10% level. The results obtained indicate that cosmic ray nuclei spectra within 1 kpc from the solar system in regions studied are close to the local interstellar spectra inferred from direct measurements at the Earth within {approx}10%.

  14. Awards

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

    Scientists and engineers from more than 650 federal government laboratories and research centers compete for the 30 awards presented each year. Fusion Power Associates Fusion Power ...

  15. Fermi surface measurements in YBa sub 2 Cu sub 3 O sub 7-x and La sub 1. 874 Sr sub. 126 CuO sub 4

    SciTech Connect (OSTI)

    Howell, R.H.; Sterne, P.A.; Solal, F.; Fluss, M.J. ); Haghighi, H.; Kaiser, J.H.; Rayner, S.L.; West, R.N. ); Liu, J.Z; Shelton, R. ); Kojima, H. ); Kitazawa, K. )

    1991-06-25

    We report new, ultra high precision measurements of the electron-positron momentum spectra of YBa{sub 2}Cu{sub 3}O{sub 7-x} and La{sub 1.874}Sr{sub 126}CuO{sub 4}. The YBCO experiments were performed on twin free, single crystals and show discontinuities with the symmetry of the Fermi surface of the CuO chain bands. Conduction band and underlying features in LSCO share the same symmetry and can only be separated with the aid of LDA calculations. 5 refs., 3 figs.

  16. Time resolved spectroscopy of SGR J15505418 bursts detected with Fermi/gamma-ray burst monitor

    SciTech Connect (OSTI)

    Younes, G. [Universities Space Research Association, 6767 Old Madison Pike, Suite 450, Huntsville, AL 35806 (United States); Kouveliotou, C.; Collazzi, A. [Astrophysics Office, ZP 12, NASA-Marshall Space Flight Center, Huntsville, AL 35812 (United States); Van der Horst, A. J.; Watts, A. L.; Huppenkothen, D.; Van der Klis, M.; Van Putten, T. [Astronomical Institute "Anton Pannekoek," University of Amsterdam, Postbus 94249, 1090 GE Amsterdam (Netherlands); Baring, M. G. [Department of Physics and Astronomy, Rice University, MS-108, P.O. Box 1892, Houston, TX 77251 (United States); Granot, J. [Department of Natural Sciences, The Open University of Israel, 1 University Road, P.O. Box 808, Ranana 43537 (Israel); Bhat, P. N.; Gorgone, N. [University of Alabama in Huntsville CSPAR, 320 Sparkman Drive, Huntsville, AL 35805 (United States); Gehrels, N.; Mcenery, J. [NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States); G??, E.; Kaneko, Y.; Lin, L. [Sabanc? University, Orhanl?-Tuzla, ?stanbul 34956 (Turkey); Gruber, D.; Von Kienlin, A. [Max Planck Institute for Extraterrestrial Physics, Giessenbachstrasse, Postfach 1312, D-85748 Garching (Germany); Grunblatt, S. [University of Hawaii at Manoa, 2500 Campus Road, Honolulu, HI 96822 (United States); and others

    2014-04-10

    We report on a time-resolved spectroscopy of the 63 brightest bursts of SGR J15505418, detected with the Fermi/Gamma-ray Burst Monitor during its 2008-2009 intense bursting episode. We performed spectral analysis down to 4 ms timescales to characterize the spectral evolution of the bursts. Using a Comptonized model, we find that the peak energy, E {sub peak}, anti-correlates with flux, while the low-energy photon index remains constant at ? 0.8 up to a flux limit F ? 10{sup 5} erg s{sup 1} cm{sup 2}. Above this flux value, the E {sub peak}flux correlation changes sign, and the index positively correlates with the flux reaching ?1 at the highest fluxes. Using a two blackbody model, we find that the areas and fluxes of the two emitting regions correlate positively. Further, we study here for the first time the evolution of the temperatures and areas as a function of flux. We find that the areakT relation follows the lines of constant luminosity at the lowest fluxes, R {sup 2}?kT {sup 4}, with a break at the higher fluxes (F > 10{sup 5.5} erg s{sup 1} cm{sup 2}). The area of the high-kT component increases with the flux while its temperature decreases, which we interpret as being due to an adiabatic cooling process. The area of the low-kT component, on the other hand, appears to saturate at the highest fluxes, toward R {sub max} ? 30 km. Assuming that crust quakes are responsible for soft gamma repeater (SGR) bursts and considering R {sub max} as the maximum radius of the emitting photon-pair plasma fireball, we relate this saturation radius to a minimum excitation radius of the magnetosphere, and we put a lower limit on the internal magnetic field of SGR J15505418, B {sub int} ? 4.5 10{sup 15} G.

  17. FermiNews

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

    News Wilson Hall After 26 years under the same title, FERMINEWS ended its run with the June 2004 issue. A new magazine, SYMMETRY, became the successor to FERMINEWS in October 2004. SYMMETRY has a new design and a new outlook, but the same priority of connecting people and science-- the people who do the scientific work of particle physics, and the people who want to know about it. The FERMINEWS archive of past issues will remain right where it is. And by using the sign-up link below, you can

  18. Enrico Fermi - Hanford Site

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

    Enormous Blades for Offshore Energy Enormous Blades for Offshore Energy February 8, 2016 - 2:00pm Addthis Sandia's design for giant wind turbine blades that are stowed at dangerous wind speeds to reduce the risk of damage. | Courtesy of TrevorJohnston.com/Popular Science Stephanie Holinka Sandia National Laboratories A new design for gigantic blades longer than two football fields could help bring offshore 50-megawatt (MW) wind turbines to the United States and the world. Sandia's research on

  19. Fermi Site Office Jobs

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

  20. Fermi National Accelerator Laboratory

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

    Arizona, Arkansas, Deleware, Florida, Georgia, Iowa, Kansas, Missouri, Nebraska, New Hampshire, North Carolina, Oklahoma, Rhode Island, South Carolina, Tennesse, Wyoming...

  1. Fermi National Accelerator Laboratory

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

    North Carolina, Rhode Island, Tennessee, Vermont 1,000,001-5,000,000 Indiana, Maryland, New Hampshire, Washington Colorado, District of Columbia, Florida, Massachusetts,...

  2. Fermi National Accelerator Laboratory

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

    South Dakota, Texas Arizona, Connecticut, Indiana, Kansas, Maine, Missouri, Nebraska, New Hampshire, South Carolina, Washington, Wisconsin More than 5 million California,...

  3. Fermi National Accelerator Laboratory

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

    North Dakota, Utah, Wyoming 100,001-500,000 Arizona, Arkansas, Iowa, Kansas, Nebraska, New Hampshire, North Carolina, Oklahoma, Rhode Island, South Carolina, Vermont 500,001-1...

  4. Awards

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

    Awards Print Recent awards given to ALS staff and users in recognition of their scientific and technical achievements. ALS users and staff are invited to send us information about recent awards by completing this form or by sending an email to This e-mail address is being protected from spambots. You need JavaScript enabled to view it . 2014 October-November ALS users Jennifer Doudna and Artur Braun were recognized by Foreign Policy Magazine as innovators in the annual selection of 100 Global

  5. award

    National Nuclear Security Administration (NNSA)

    about these awards on the Y-12 website.

    Pantex Plant's Calvin Nelson honored as Analyst of the Year for...

  6. GRB 110709A, 111117A, AND 120107A: FAINT HIGH-ENERGY GAMMA-RAY PHOTON EMISSION FROM FERMI-LAT OBSERVATIONS AND DEMOGRAPHIC IMPLICATIONS

    SciTech Connect (OSTI)

    Zheng Weikang; Akerlof, Carl W.; McKay, Timothy A. [Department of Physics, University of Michigan, 450 Church Street, Ann Arbor, MI 48109 (United States); Pandey, Shashi B. [Aryabhatta Research Institute of Observational Sciences, Manora Peak, Nainital 263129 (India); Zhang Binbin [Department of Astronomy and Astrophysics, Pennsylvania State University, University Park, PA 16802 (United States); Zhang Bing [Department of Physics and Astronomy, University of Nevada, Las Vegas, NV 89154 (United States); Sakamoto, Takanori, E-mail: zwk@umich.edu [Center for Research and Exploration in Space Science and Technology (CRESST), NASA Goddard Space Flight Center, Greenbelt, MD 20771 (United States)

    2012-09-01

    Launched on 2008 June 11, the Large Area Telescope (LAT) instrument on board the Fermi Gamma-ray Space Telescope has provided a rare opportunity to study high-energy photon emission from gamma-ray bursts (GRBs). Although the majority of such events (27) have been identified by the Fermi-LAT Collaboration, four were uncovered by using more sensitive statistical techniques. In this paper, we continue our earlier work by finding three more GRBs associated with high-energy photon emission, GRB 110709A, 111117A, and 120107A. To systematize our matched filter approach, a pipeline has been developed to identify these objects in nearly real time. GRB 120107A is the first product of this analysis procedure. Despite the reduced threshold for identification, the number of GRB events has not increased significantly. This relative dearth of events with low photon number prompted a study of the apparent photon number distribution. We find an extremely good fit to a simple power law with an exponent of -1.8 {+-} 0.3 for the differential distribution. As might be expected, there is a substantial correlation between the number of lower energy photons detected by the Gamma-ray Burst Monitor (GBM) and the number observed by LAT. Thus, high-energy photon emission is associated with some but not all of the brighter GBM events. Deeper studies of the properties of the small population of high-energy emitting bursts may eventually yield a better understanding of these entire phenomena.

  7. A possible explanation of low energy γ-ray excess from galactic centre and Fermi bubble by a Dark Matter model with two real scalars

    SciTech Connect (OSTI)

    Modak, Kamakshya Prasad; Majumdar, Debasish

    2015-03-09

    We promote the idea of multi-component Dark Matter (DM) to explain results from both direct and indirect detection experiments. In these models as contribution of each DM candidate to relic abundance is summed up to meet WMAP/Planck measurements of Ω{sub DM}, these candidates have larger annihilation cross-sections compared to the single-component DM models. We illustrate this fact by introducing an extra scalar to the popular single real scalar DM model. We also present detailed calculations for the vacuum stability bounds, perturbative unitarity and triviality constraints on this model. As direct detection experimental results still show some conflict, we kept our options open, discussing different scenarios with different DM mass zones. In the framework of our model we make an interesting observation: the existing direct detection experiments like CDMS II, CoGeNT, CRESST II, XENON 100 or LUX together with the observation of excess low energy γ-ray from galactic centre and Fermi bubble by Fermi Gamma-ray Space Telescope (FGST) already have the capability to distinguish between different DM halo profiles.

  8. Nodal to nodeless superconducting energy-gap structure change concomitant with Fermi-surface reconstruction in the heavy-fermion compound CeCoIn5

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

    Kim, Hyunsoo; Tanatar, M. A.; Flint, R.; Petrovic, C.; Hu, Rongwei; White, B. D.; Lum, I. K.; Maple, M. B.; Prozorov, R.

    2015-01-15

    The London penetration depth λ(T) was measured in single crystals of Ce1–xRxCoIn₅, R=La, Nd, and Yb down to Tmin ≈ 50 mK (Tc/Tmin ~50) using a tunnel-diode resonator. In the cleanest samples Δλ(T) is best described by the power law, Δλ(T) ∝ Tn, with n ~ 1, consistent with line nodes. Substitutions of Ce with La, Nd, and Yb lead to similar monotonic suppressions of Tc, however, the effects on Δλ(T) differ. While La and Nd dopings lead to increase of the exponent n and saturation at n ~ 2, as expected for a dirty nodal superconductor, Yb doping leadsmore » to n > 3, suggesting a change from nodal to nodeless superconductivity. As a result, this superconducting gap structure change happens in the same doping range where changes of the Fermi surface topology were reported, implying that the nodal structure and Fermi surface topology are closely linked.« less

  9. Topological crystalline insulator Pb{sub x}Sn{sub 1-x}Te thin films on SrTiO{sub 3} (001) with tunable Fermi levels

    SciTech Connect (OSTI)

    Guo, Hua; Liu, Jun-Wei; Wang, Zhen-Yu; Wu, Rui; Ji, Shuai-Hua; Duan, Wen-Hui; Chen, Xi Xue, Qi-Kun; Yan, Chen-Hui; Zhang, Zhi-Dong; Wang, Li-Li; He, Ke; Ma, Xu-Cun

    2014-05-01

    In this letter, we report a systematic study of topological crystalline insulator Pb{sub x}Sn{sub 1-x}Te (0 < x < 1) thin films grown by molecular beam epitaxy on SrTiO{sub 3}(001). Two domains of Pb{sub x}Sn{sub 1-x}Te thin films with intersecting angle of ? ? 45 were confirmed by reflection high energy diffraction, scanning tunneling microscopy, and angle-resolved photoemission spectroscopy (ARPES). ARPES study of Pb{sub x}Sn{sub 1-x}Te thin films demonstrated that the Fermi level of PbTe could be tuned by altering the temperature of substrate whereas SnTe cannot. An M-shaped valance band structure was observed only in SnTe but PbTe is in a topological trivial state with a large gap. In addition, co-evaporation of SnTe and PbTe results in an equivalent variation of Pb concentration as well as the Fermi level of Pb{sub x}Sn{sub 1-x}Te thin films.

  10. Revised FINAL–REPORT NO. 2: INDEPENDENT CONFIRMATORY SURVEY SUMMARY AND RESULTS FOR THE ENRICO FERMI ATOMIC POWER PLANT, UNIT 1, NEWPORT, MICHIGAN (DOCKET NO. 50 16; RFTA 10-004) 2018-SR-02-1

    SciTech Connect (OSTI)

    Erika Bailey

    2011-10-27

    The Enrico Fermi Atomic Power Plant, Unit 1 (Fermi 1) was a fast breeder reactor design that was cooled by sodium and operated at essentially atmospheric pressure. On May 10, 1963, the Atomic Energy Commission (AEC) granted an operating license, DPR-9, to the Power Reactor Development Company (PRDC), a consortium specifically formed to own and operate a nuclear reactor at the Fermi 1 site. The reactor was designed for a maximum capability of 430 megawatts (MW); however, the maximum reactor power with the first core loading (Core A) was 200 MW. The primary system was filled with sodium in December 1960 and criticality was achieved in August 1963. The reactor was tested at low power during the first couple years of operation. Power ascension testing above 1 MW commenced in December 1965 immediately following the receipt of a high-power operating license. In October 1966 during power ascension, zirconium plates at the bottom of the reactor vessel became loose and blocked sodium coolant flow to some fuel subassemblies. Two subassemblies started to melt and the reactor was manually shut down. No abnormal releases to the environment occurred. Forty-two months later after the cause had been determined, cleanup completed, and the fuel replaced, Fermi 1 was restarted. However, in November 1972, PRDC made the decision to decommission Fermi 1 as the core was approaching its burn-up limit. The fuel and blanket subassemblies were shipped off-site in 1973. Following that, the secondary sodium system was drained and sent off-site. The radioactive primary sodium was stored on-site in storage tanks and 55 gallon (gal) drums until it was shipped off-site in 1984. The initial decommissioning of Fermi 1 was completed in 1975. Effective January 23, 1976, DPR-9 was transferred to the Detroit Edison Company (DTE) as a 'possession only' license (DTE 2010a). This report details the confirmatory activities performed during the second Oak Ridge Institute for Science and Education (ORISE) site visit to Fermi 1 in November 2010. The survey was strategically planned during a Unit 2 (Fermi 2) outage to take advantage of decreased radiation levels that were observed and attributed to Fermi 2 from the operating unit during the first site visit. However, during the second visit there were elevated radiation levels observed and attributed to the partially dismantled Fermi 1 reactor vessel and a waste storage box located on the 3rd floor of the Fermi 1 Turbine Building. Confirmatory surveys (unshielded) performed directly in the line of sight of these areas were affected. The objective of the confirmatory survey was to verify that the final radiological conditions were accurately and adequately described in Final Status Survey (FSS) documentation, relative to the established release criteria. This objective was achieved by performing document reviews, as well as independent measurements and sampling. Specifically, documentation of the planning, implementation, and results of the FSS were evaluated; side-by-side FSS measurement and source comparisons were performed; site areas were evaluated relative to appropriate FSS classification; and areas were assessed for residual, undocumented contamination.

  11. Searching for dark matter annihilation from Milky Way dwarf spheroidal galaxies with six years of Fermi Large Area Telescope data

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

    Ackermann, M.

    2015-11-30

    The dwarf spheroidal satellite galaxies (dSphs) of the Milky Way are some of the most dark matter (DM) dominated objects known. We report on γ-ray observations of Milky Way dSphs based on six years of Fermi Large Area Telescope data processed with the new Pass8 event-level analysis. None of the dSphs are significantly detected in γ rays, and we present upper limits on the DM annihilation cross section from a combined analysis of 15 dSphs. As a result, these constraints are among the strongest and most robust to date and lie below the canonical thermal relic cross section for DMmore » of mass ≲100 GeV annihilating via quark and τ-lepton channels.« less

  12. Searching for dark matter annihilation from MilkyWay dwarf spheroidal galaxies with six years of Fermi Large Area Telescope data

    SciTech Connect (OSTI)

    Ackermann, M.

    2015-11-30

    The dwarf spheroidal satellite galaxies (dSphs) of the Milky Way are some of the most dark matter (DM) dominated objects known. We report on ?-ray observations of Milky Way dSphs based on six years of Fermi Large Area Telescope data processed with the new Pass8 event-level analysis. None of the dSphs are significantly detected in ? rays, and we present upper limits on the DM annihilation cross section from a combined analysis of 15 dSphs. As a result, these constraints are among the strongest and most robust to date and lie below the canonical thermal relic cross section for DM of mass ?100 GeV annihilating via quark and ?-lepton channels.

  13. High-energy gamma-ray emission from solar flares: Summary of Fermi large area telescope detections and analysis of two M-class flares

    SciTech Connect (OSTI)

    Ackermann, M.; Ajello, M.; Albert, A.; Allafort, A.; Bechtol, K.; Bottacini, E.; Buehler, R.; Baldini, L.; Barbiellini, G.; Bastieri, D.; Buson, S.; Bellazzini, R.; Bregeon, J.; Bissaldi, E.; Bonamente, E.; Bouvier, A.; Brandt, T. J.; Brigida, M.; Bruel, P.; and others

    2014-05-20

    We present the detections of 18 solar flares detected in high-energy γ-rays (above 100 MeV) with the Fermi Large Area Telescope (LAT) during its first 4 yr of operation. This work suggests that particle acceleration up to very high energies in solar flares is more common than previously thought, occurring even in modest flares, and for longer durations. Interestingly, all these flares are associated with fairly fast coronal mass ejections (CMEs). We then describe the detailed temporal, spatial, and spectral characteristics of the first two long-lasting events: the 2011 March 7 flare, a moderate (M3.7) impulsive flare followed by slowly varying γ-ray emission over 13 hr, and the 2011 June 7 M2.5 flare, which was followed by γ-ray emission lasting for 2 hr. We compare the Fermi LAT data with X-ray and proton data measurements from GOES and RHESSI. We argue that the γ-rays are more likely produced through pion decay than electron bremsstrahlung, and we find that the energy spectrum of the proton distribution softens during the extended emission of the 2011 March 7 flare. This would disfavor a trapping scenario for particles accelerated during the impulsive phase of the flare and point to a continuous acceleration process at play for the duration of the flares. CME shocks are known for accelerating the solar energetic particles (SEPs) observed in situ on similar timescales, but it might be challenging to explain the production of γ-rays at the surface of the Sun while the CME is halfway to the Earth. A stochastic turbulence acceleration process occurring in the solar corona is another likely scenario. Detailed comparison of characteristics of SEPs and γ-ray-emitting particles for several flares will be helpful to distinguish between these two possibilities.

  14. FERMI RULES OUT THE INVERSE COMPTON/CMB MODEL FOR THE LARGE-SCALE JET X-RAY EMISSION OF 3C 273

    SciTech Connect (OSTI)

    Meyer, Eileen T.; Georganopoulos, Markos

    2014-01-10

    The X-ray emission mechanism in large-scale jets of powerful radio quasars has been a source of debate in recent years, with two competing interpretations: either the X-rays are of synchrotron origin, arising from a different electron energy distribution than that producing the radio to optical synchrotron component, or they are due to inverse Compton scattering of cosmic microwave background photons (IC/CMB) by relativistic electrons in a powerful relativistic jet with bulk Lorentz factor ? ? 10-20. These two models imply radically different conditions in the large-scale jet in terms of jet speed, kinetic power, and maximum energy of the particle acceleration mechanism, with important implications for the impact of the jet on the large-scale environment. A large part of the X-ray origin debate has centered on the well-studied source 3C 273. Here we present new observations from Fermi which put an upper limit on the gamma-ray flux from the large-scale jet of 3C 273 that violates at a confidence greater that 99.9% the flux expected from the IC/CMB X-ray model found by extrapolation of the UV to X-ray spectrum of knot A, thus ruling out the IC/CMB interpretation entirely for this source when combined with previous work. Further, this upper limit from Fermi puts a limit on the Doppler beaming factor of at least ? <9, assuming equipartition fields, and possibly as low as ? <5, assuming no major deceleration of the jet from knots A throughD1.

  15. Importance of the Fermi-surface topology to the superconducting state of the electron-doped pnictide Ba(Fe1-xCox)₂As₂

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

    Liu, Chang; Palczewski, A. D.; Dhaka, R. S.; Kondo, Takeshi; Fernandes, R. M.; Mun, E. D.; Hodovanets, H.; Thaler, A. N.; Schmalian, J.; Bud’ko, S. L.; et al

    2011-07-25

    We used angle-resolved photoemission spectroscopy and thermoelectric power to study the poorly explored, highly overdoped side of the phase diagram of Ba(Fe1-xCox)₂As₂ high-temperature superconductor. Our data demonstrate that several Lifshitz transitions—topological changes of the Fermi surface—occur for large x. The central hole barrel changes to ellipsoids that are centered at Z at x~0.11 and subsequently disappear around x~0.2; changes in thermoelectric power occur at similar x values. Tc decreases and goes to zero around x~0.15—between the two Lifshitz transitions. Beyond x=0.2 the central pocket becomes electron-like and superconductivity does not exist. Our observations reveal the importance of the underlying Fermiologymore » in electron-doped iron arsenides. We speculate that a likely necessary condition for superconductivity in these materials is the presence of the central hole pockets rather than nesting between central and corner pockets.« less

  16. FERMI-LAT OBSERVATIONS OF SUPERNOVA REMNANTS INTERACTING WITH MOLECULAR CLOUDS: W41, MSH 17-39, AND G337.7-0.1

    SciTech Connect (OSTI)

    Castro, Daniel; Figueroa-Feliciano, Enectali; Slane, Patrick; Carlton, Ashley

    2013-09-01

    We report the detection of {gamma}-ray emission coincident with three supernova remnants (SNRs) using data from the Large Area Telescope on board the Fermi Gamma-ray Space Telescope. W41, G337.7-0.1, and MSH 17-39 are SNRs known to be interacting with molecular clouds, as evidenced by observations of hydroxyl (OH) maser emission at 1720 MHz in their directions and other observational information. SNR shocks are expected to be sites of cosmic-ray acceleration, and clouds of dense material can provide effective targets for production of {gamma}-rays from {pi}{sup 0}-decay. The observations reveal unresolved sources in the direction of G337.7-0.1 and MSH 17-39 and an extended source coincident with W41. We model their broadband emission (radio to {gamma}-ray) using a simple one-zone model, and after considering scenarios in which the MeV-TeV sources originate from either {pi}{sup 0}-decay or leptonic emission, we conclude that the {gamma}-rays are most likely produced through the hadronic channel.

  17. Search for gamma-ray emission from dark matter annihilation in the large magellanic cloud with the fermi large area telescope

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

    Buckley, Matthew R.; Charles, Eric; Gaskins, Jennifer M.; Brooks, Alyson M.; Drlica-Wagner, Alex; Martin, Pierrick; Zhao, Geng

    2015-05-05

    At a distance of 50 kpc and with a dark matter mass of ~1010 M⊙, the large magellanic cloud (LMC) is a natural target for indirect dark matter searches. We use five years of data from the Fermi Large Area Telescope (LAT) and updated models of the gamma-ray emission from standard astrophysical components to search for a dark matter annihilation signal from the LMC. We perform a rotation curve analysis to determine the dark matter distribution, setting a robust minimum on the amount of dark matter in the LMC, which we use to set conservative bounds on the annihilation cross section.more » The LMC emission is generally very well described by the standard astrophysical sources, with at most a 1–2σ excess identified near the kinematic center of the LMC once systematic uncertainties are taken into account. As a result, we place competitive bounds on the dark matter annihilation cross section as a function of dark matter particle mass and annihilation channel.« less

  18. The mystery of spectral breaks: Lyman continuum absorption by photon-photon pair production in the Fermi GeV spectra of bright blazars

    SciTech Connect (OSTI)

    Stern, Boris E. [Institute for Nuclear Research, Russian Academy of Sciences, Prospekt 60-letiya Oktyabrya 7a, Moscow 117312 (Russian Federation); Poutanen, Juri, E-mail: stern.boris@gmail.com, E-mail: juri.poutanen@utu.fi [Tuorla Observatory, University of Turku, Vislntie 20, FI-21500 Piikki (Finland)

    2014-10-10

    We re-analyze Fermi/LAT ?-ray spectra of bright blazars using the new Pass 7 version of the detector response files and detect breaks at ?5 GeV in the rest-frame spectra of 3C 454.3 and possibly also 4C +21.35, associated with the photon-photon pair production absorption by the He II Lyman continuum (LyC). We also detect significant breaks at ?20 GeV associated with hydrogen LyC in both the individual spectra and the stacked redshift-corrected spectrum of several bright blazars. The detected breaks in the stacked spectra univocally prove that they are associated with atomic ultraviolet emission features of the quasar broad-line region (BLR). The dominance of the absorption by the hydrogen Ly complex over He II, a small detected optical depth, and break energy consistent with head-on collisions with LyC photons imply that the ?-ray emission site is located within the BLR, but most of the BLR emission comes from a flat disk-like structure producing little opacity. Alternatively, the LyC emission region size might be larger than the BLR size measured from reverberation mapping, and/or the ?-ray emitting region is extended. These solutions would resolve the long-standing issue of how the multi-hundred GeV photons can escape from the emission zone without being absorbed by softer photons.

  19. Simultaneous Observations of PKS 2155--304 with H.E.S.S., Fermi, RXTE and ATOM: Spectral Energy Distributions and Variability in a Low State

    SciTech Connect (OSTI)

    Aharonian, F.; Akhperjanian, A.G.; Anton, G.; Barres de Almeida, U.; Bazer-Bachi, A.R.; Becherini, Y.; Behera, B.; Bernlohr, K.; Boisson, C.; Bochow, A.; Borrel, V.; Brion, E.; Brucker, J.; Brun, P.; Buhler, R.; Bulik, T.; Busching, I.; Boutelier, T.; Chadwick, P.M.; Charbonnier, A.; Chaves, R.C.G.; /more authors..

    2009-05-07

    We report on the first simultaneous observations that cover the optical, X-ray, and high-energy gamma-ray bands of the BL Lac object PKS 2155-304. The gamma-ray bands were observed for 11 days, between 2008 August 25 and 2008 September 6 (MJD 54704-54715), jointly with the Fermi Gamma-ray Space Telescope and the HESS atmospheric Cherenkov array, providing the first simultaneous MeV-TeV spectral energy distribution (SED) with the new generation of {gamma}-ray telescopes. The ATOM telescope and the RXTE and Swift observatories provided optical and X-ray coverage of the low-energy component over the same time period. The object was close to the lowest archival X-ray and very high energy (VHE; >100 GeV) state, whereas the optical flux was much higher. The light curves show relatively little ({approx}30%) variability overall when compared to past flaring episodes, but we find a clear optical/VHE correlation and evidence for a correlation of the X-rays with the high-energy spectral index. Contrary to previous observations in the flaring state, we do not find any correlation between the X-ray and VHE components. Although synchrotron self-Compton models are often invoked to explain the SEDs of BL Lac objects, the most common versions of these models are at odds with the correlated variability we find in the various bands for PKS 2155-304.

  20. Transition from band insulator to Bose-Einstein-condensate superfluid and Mott state of cold Fermi gases with multiband effects in optical lattices

    SciTech Connect (OSTI)

    Watanabe, Ryota; Imada, Masatoshi

    2009-10-15

    We study two models realized by two-component Fermi gases loaded in optical lattices. We clarify that multiband effects inevitably caused by the optical lattices generate a rich structure, when the systems crossover from the region of weakly bound molecular bosons to the region of strongly bound atomic bosons. Here the crossover can be controlled by attractive fermion interaction. One of the present models is a case with attractive fermion interaction, where an insulator-superfluid transition takes place. The transition is characterized as the transition between a band insulator and a Bose-Einstein condensate superfluid state. Differing from the conventional Bardeen-Cooper-Schrieffer (BCS) superfluid transition, this transition shows unconventional properties. In contrast to the one-particle excitation gap scaled by the superfluid order parameter in the conventional BCS transition, because of the multiband effects, a large gap of one-particle density of states is retained all through the transition, although the superfluid order grows continuously from zero. A re-entrant transition with lowering temperature is another unconventionality. The other model is the case with coexisting attractive and repulsive interactions. Within a mean-field treatment, we find a new insulating state, an orbital ordered insulator. This insulator is one candidate for the Mott insulator of molecular bosons and is the first example that the orbital internal degrees of freedom of molecular bosons appears explicitly. Besides the emergence of a new phase, a coexisting phase also appears where superfluidity and an orbital order coexist just by doping holes or particles. The insulating and superfluid particles show differentiation in momentum space as in the high-T{sub c} cuprate superconductors.

  1. Toward a comprehensive model for feedback by active galactic nuclei: New insights from M87 observations by LOFAR, Fermi, and H.E.S.S

    SciTech Connect (OSTI)

    Pfrommer, Christoph

    2013-12-10

    Feedback by active galactic nuclei (AGNs) appears to be critical in balancing radiative cooling of the low-entropy gas at the centers of galaxy clusters and in mitigating the star formation of elliptical galaxies. New observations of M87 enable us to put forward a comprehensive model for the physical heating mechanism. Low-frequency radio observations by LOFAR revealed the absence of fossil cosmic-ray (CR) electrons in the radio halo surrounding M87. This puzzle can be resolved by accounting for the CR release from the radio lobes and the subsequent mixing of CRs with the dense ambient intracluster gas, which thermalizes the electrons on a timescale similar to the radio halo age of 40 Myr. Hadronic interactions of similarly injected CR protons with the ambient gas should produce an observable gamma-ray signal in accordance with the steady emission of the low state of M87 detected by Fermi and H.E.S.S. Hence, we normalize the CR population to the gamma-ray emission, which shows the same spectral slope as the CR injection spectrum probed by LOFAR, thereby supporting a common origin. We show that CRs, which stream at the Alfvn velocity with respect to the plasma rest frame, heat the surrounding thermal plasma at a rate that balances that of radiative cooling on average at each radius. However, the resulting global thermal equilibrium is locally unstable and allows for the formation of the observed cooling multi-phase medium through thermal instability. Provided that CR heating balances cooling during the emerging 'cooling flow', the collapse of the majority of the gas is halted around 1 keVin accordance with X-ray data. We show that both the existence of a temperature floor and the similar radial scaling of the heating and cooling rates are generic predictions of the CR heating model.

  2. Non-thermal electron acceleration in low Mach number collisionless shocks. II. Firehose-mediated Fermi acceleration and its dependence on pre-shock conditions

    SciTech Connect (OSTI)

    Guo, Xinyi; Narayan, Ramesh; Sironi, Lorenzo

    2014-12-10

    Electron acceleration to non-thermal energies is known to occur in low Mach number (M{sub s} ? 5) shocks in galaxy clusters and solar flares, but the electron acceleration mechanism remains poorly understood. Using two-dimensional (2D) particle-in-cell (PIC) plasma simulations, we showed in Paper I that electrons are efficiently accelerated in low Mach number (M{sub s} = 3) quasi-perpendicular shocks via a Fermi-like process. The electrons bounce between the upstream region and the shock front, with each reflection at the shock resulting in energy gain via shock drift acceleration. The upstream scattering is provided by oblique magnetic waves that are self-generated by the electrons escaping ahead of the shock. In the present work, we employ additional 2D PIC simulations to address the nature of the upstream oblique waves. We find that the waves are generated by the shock-reflected electrons via the firehose instability, which is driven by an anisotropy in the electron velocity distribution. We systematically explore how the efficiency of wave generation and of electron acceleration depend on the magnetic field obliquity, the flow magnetization (or equivalently, the plasma beta), and the upstream electron temperature. We find that the mechanism works for shocks with high plasma beta (? 20) at nearly all magnetic field obliquities, and for electron temperatures in the range relevant for galaxy clusters. Our findings offer a natural solution to the conflict between the bright radio synchrotron emission observed from the outskirts of galaxy clusters and the low electron acceleration efficiency usually expected in low Mach number shocks.

  3. An Iridate with Fermi Arcs

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

    (Univ. of Michigan); and B.J Kim (Argonne National Laboratory, Univ. of Michigan, and Max Planck Institute for Solid State Research). Research funding: National Science...

  4. Non-Fermi-liquid, magnetic, and Kondo behavior in the heavy-fermion system U{sub {bold 2}}Cu{sub 17{minus}x}Al{sub x} (5{le}x{le}10)

    SciTech Connect (OSTI)

    Pietri, R.; Andraka, B.; Troc, R.; Tran, V.H.

    1997-12-01

    Results of specific heat, magnetic susceptibility, magnetization, and electrical resistivity for the heavy-fermion alloy system U{sub 2}Cu{sub 17{minus}x}Al{sub x} (5{le}x{le}10) are presented. The nonmagnetic alloy U{sub 2}Cu{sub 12}Al{sub 5} exhibits non-Fermi-liquid characteristics at low temperatures: {rho}{proportional_to}T and C/T {proportional_to} lnT. These non-Fermi-liquid characteristics also persist for other alloys corresponding to x{gt}5, which are all weakly magnetic. This magnetic behavior is revealed by a maximum in zero-field-cooled {chi}, a discrepancy between zero-field-cooled and field-cooled {chi} below this maximum, and a corresponding shoulder in C/T. The transition temperature identified by the shoulder in C/T is largest for x=8 (about 2.5 K) and decreases monotonically for either increasing or decreasing x. {copyright} {ital 1997} {ital The American Physical Society}

  5. Enhancement of spin polarization via Fermi level tuning in Co{sub 2}MnSn{sub 1−x}Sb{sub x} (x = 0, 0.25. 0.5, 0.75, 1) Heusler alloys

    SciTech Connect (OSTI)

    Singh, Mukhtiyar Thakur, Jyoti; Kashyap, Manish K.; Saini, Hardev S.

    2014-04-24

    Full potential approach has been employed to tune Fermi level in Co{sub 2}MnSn{sub 1−x}Sb{sub x} (x = 0, 0.25, 0.5, 0.75, 1) Heulser alloys for enhancement of spin polarization and finding signature of half metallicity. Present density functional theory (DFT) based calculation indicates that stoichoimetric Heusler alloy, Co{sub 2}MnSn is not a half-metallic ferromagnet but the doping of Sb in it results in the shifting of E{sup F} in well-defined energy gap which leads the 100% spin polarization in the resultant alloys. The magnetism in present alloys is governed by localized moment on Mn atom mainly. The tuning of half-metallicity using doping can be proved as an ideal technique to search the new materials which can accomplish the need of spintronics.

  6. SES Awards

    Broader source: Energy.gov [DOE]

    The three SES award programs are: •Performance Awards (bonuses); •Presidential Rank Awards; and •Other Awards (Special Act, Special Service, etc)

  7. NERSC Announces Winners of Inaugural HPC Achievement Awards

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

    ... which showed a large effect of the Fermi surface on oscillations in thermal observables in a rotating magnetic field, even for fully isotropic superconducting gaps. ...

  8. Blog Feed: Vehicles | Department of Energy

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

    with the Enrico Fermi Award Learn more about 2013 Enrico Fermi Award winners Dr. Allen Bard and Dr. Andy Sessler and their contributions to science, technology and human...

  9. SIX YEARS OF FERMI-LAT AND MULTI-WAVELENGTH MONITORING OF THE BROAD-LINE RADIO GALAXY 3C 120: JET DISSIPATION AT SUB-PARSEC SCALES FROM THE CENTRAL ENGINE

    SciTech Connect (OSTI)

    Tanaka, Y. T.; Doi, A.; Inoue, Y.; Stawarz, L.; Cheung, C. C.; Fukazawa, Y.; Itoh, R.; Gurwell, M. A.; Tahara, M.; Kataoka, J.

    2015-01-30

    We present multi-wavelength monitoring results for the broad-line radio galaxy 3C 120 in the MeV/GeV, sub-millimeter, and 43 GHz bands over 6 yr. Over the past 2 yr, the Fermi-Large Area Telescope sporadically detected 3C 120 with high significance and the 230 GHz data also suggest an enhanced activity of the source. After the MeV/GeV detection from 3C 120 in MJD 56240–56300, 43 GHz Very Long Baseline Array (VLBA) monitoring revealed a brightening of the radio core, followed by the ejection of a superluminal knot. Since we observed the γ-ray and VLBA phenomena in temporal proximity to each other, it is naturally assumed that they are physically connected. This assumption was further supported by the subsequent observation that the 43 GHz core brightened again after a γ-ray flare occurred around MJD 56560. We can then infer that the MeV/GeV emission took place inside an unresolved 43 GHz core of 3C 120 and that the jet dissipation occurred at sub-parsec distances from the central black hole (BH), if we take the distance of the 43 GHz core from the central BH as ∼0.5 pc, as previously estimated from the time lag between X-ray dips and knot ejections. Based on our constraints on the relative locations of the emission regions and energetic arguments, we conclude that the γ rays are more favorably produced via the synchrotron self-Compton process, rather than inverse Compton scattering of external photons coming from the broad line region or hot dusty torus. We also derived the electron distribution and magnetic field by modeling the simultaneous broadband spectrum.

  10. Fermi National Accelerator Laboratory August 2015

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

    5 In 2012 at the Large Hadron Collider, scientists discovered the long-sought Higgs boson. Now the question is: Are there more types of Higgs bosons? What is a Higgs boson? What is...

  11. Fermi National Accelerator Laboratory June 2012

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

    recorded two distinct top-quark production mechanisms Explored a new mass range for the Higgs boson and constrained its mass through top-quark and W-boson mass measurements...

  12. Graphic Standards Fermi National Accelerator Laboratory 2014

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

    onto your slide, click outside of the text areas on the slide, select Insert > Choose. Search for your file and click Insert. Drag the image to position it to fit on your slide...

  13. Fermi National Accelerator Laboratory April 2015

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

    thus explore whether the universe is even more complex than we think. Probing hints at new physics ICARUS: high-tech from Italy MicroBooNE: testing an anomaly SBND: closest to...

  14. Fermi National Accelerator Laboratory January 2015

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

    Drexel University Pennsylvania State University University of Pennsylvania, Philadelphia University of Pittsburgh Puerto Rico University of Puerto Rico, Mayaguez Rhode...

  15. Fermi National Accelerator Laboratory August 2013

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

    Drexel University Pennsylvania State University University of Pennsylvania, Philadelphia University of Pittsburgh, Pittsburgh Puerto Rico University of Puerto Rico,...

  16. Fermi National Accelerator Laboratory FY 2008

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

    University Carnegie Mellon University, Pittsburgh University of Pennsylvania, Philadelphia University of Pittsburgh, Pittsburgh Puerto Rico University of Puerto Rico,...

  17. Fermi National Accelerator Laboratory FY 2010

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

    Bucknell University Carnegie Mellon University, Pittsburgh Temple University, Philadelphia University of Pennsylvania, Philadelphia University of Pittsburgh, Pittsburgh...

  18. Correlation between Fermi surface transformations and superconductivit...

    Office of Scientific and Technical Information (OSTI)

    and superconductivity in the electron-doped high- T c superconductor Nd 2 - x Ce x CuO ... and superconductivity in the electron-doped high- T c superconductor Nd 2 - x Ce x CuO ...

  19. Fermi National Accelerator Laboratory Technologies Available...

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

    About Search Categories (15) Advanced Materials Biomass and Biofuels Building Energy Efficiency Electricity Transmission Energy Analysis Energy Storage Geothermal Hydrogen and...

  20. Fermi National Accelerator Laboratory June 2012

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

    intense beam of neutrinos, particles that may hold the key to understanding why the universe is made of matter. Using the cosmos as a laboratory, Fermilab scientists explore dark...

  1. Enrico Fermi: Audio/Video Clips

    Office of Scientific and Technical Information (OSTI)

    the nuclear chain reaction that took place on December 2, 1942, with context by narrator Jay Andre. (149K; 1 minute, 26 seconds) Alternative cannot be provided. Download QuickTime...

  2. Fermi National Accelerator Laboratory November 2013

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

    is an international collaboration between U.S. universities, Fermilab in Illinois, Brookhaven National Laboratory in New York, and nine international labs and universities. It is...

  3. Fermi National Accelerator Laboratory September 2012

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

    years, is an expected byproduct of accelerator operations at Fermilab. As part of our environmental monitoring program, we regularly sample the water discharged into the creeks...

  4. Fermi National Accelerator Laboratory February 2015 Particle...

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

    known as synchrotron light sources to create the brightest light beams on Earth. These luminous sources provide tools for such applications as protein structure analysis,...

  5. GLAST (FERMI) Data-Processing Pipeline

    SciTech Connect (OSTI)

    Flath, Daniel L.; Johnson, Tony S.; Turri, Massimiliano; Heidenreich, Karen A.; /SLAC

    2011-08-12

    The Data Processing Pipeline ('Pipeline') has been developed for the Gamma-Ray Large Area Space Telescope (GLAST) which launched June 11, 2008. It generically processes graphs of dependent tasks, maintaining a full record of its state, history and data products. The Pipeline is used to automatically process the data down-linked from the satellite and to deliver science products to the GLAST collaboration and the Science Support Center and has been in continuous use since launch with great success. The pipeline handles up to 2000 concurrent jobs and in reconstructing science data produces approximately 750GB of data products using 1/2 CPU-year of processing time per day.

  6. Crystalline Phase of Strongly Interacting Fermi Mixtures

    SciTech Connect (OSTI)

    Petrov, D. S.; Astrakharchik, G. E.; Papoular, D. J.; Salomon, C.; Shlyapnikov, G. V.

    2007-09-28

    We show that the system of weakly bound molecules of heavy and light fermionic atoms is characterized by a long-range intermolecular repulsion and can undergo a gas-crystal quantum transition if the mass ratio exceeds a critical value. For the critical mass ratio above 100 obtained in our calculations, this crystalline order can be observed as a superlattice in an optical lattice for heavy atoms with a small filling factor. We also find that this novel system is sufficiently stable with respect to molecular relaxation into deep bound states and to the process of trimer formation.

  7. Fermi National Accelerator Laboratory February 2015

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

    to introduce youth to the world of science and trains college and university students in high-tech research and development. K-12 students FY2013 FY2014 K-12 teachers FY2013...

  8. Fermi National Accelerator Laboratory February 2013

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

    to introduce youth to the world of science and trains college and university students in high-tech research and development. K-12 students FY2011 FY2012 K-12 teachers FY2011...

  9. Fermi National Accelerator Laboratory April 2012

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

    technology. * With a strong focus on innovation and industrialization, IARC will attract high-tech companies and train Illinois citizens to develop advanced technology with...

  10. Fermi National Accelerator Laboratory March 2015

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

    630-840-5588 to register. Arts and Science Fermilab regularly hosts public events in Ramsey Auditorium, including lectures and arts performances. For a schedule, visit...

  11. 2015_OCTOBER.FermiOrgChart

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

    Particle Astrophysics Craig Hogan CMS Center Kevin Burkett Office of the General Counsel John Myer Office of Integrated Planning & Performance Management Erik Gottschalk Workforce...

  12. Fermi National Accelerator Laboratory August 2015

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

    one-eighth of the southern sky, recording information on 300 million galaxies, 100,000 galaxy clusters and 4,000 supernovae. The Dark Energy Survey is a collaborative effort...

  13. WINDExchange: Awards

    Wind Powering America (EERE)

    Information Resources Printable Version Bookmark and Share Publications Webinars Podcasts Economic Development Studies Wind Turbine Ordinances Awards Awards WINDExchange has presented Public Power Wind Awards to public-owned utilities, Wind Cooperative of the Year Awards to cooperatives, Carpe Ventum (Seize the Wind) Awards for the first utility-scale wind projects in a state, Outstanding Partner Awards, and Advocacy Awards. Public Power Wind Awards Oklahoma Municipal Power Authority and Silicon

  14. Article 29 Employee Awards

    Energy Savers [EERE]

    Arthur Rosenfeld About Us Arthur Rosenfeld - Former Commissioner, California Energy Commission Photo of Arthur Rosenfeld Art Rosenfeld received his Ph.D. in Physics in 1954 at the University of Chicago under Nobel Laureate Enrico Fermi, and then joined the Department of Physics at the University of California at Berkeley. There he joined, and eventually led, the Nobel prize-winning particle physics group of Luis Alvarez at Lawrence Berkeley National Laboratory until 1974. At that time, he

  15. Nafeesa Hunt Owens | Department of Energy

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

    Nafeesa Hunt Owens About Us Nafeesa Hunt Owens Most Recent Fermi Award Winners Saluted May

  16. SAGE Awards

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

    Awards SAGE Awards A National Science Foundation Research Experiences for Undergraduates program Contacts Institute Director Harald Dogliani-Los Alamos SAGE Co-Director W. Scott...

  17. Maxwell Awards

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

    Maxwell Awards The James Clerk Maxwell Prize for Plasma Physics, which is awarded by the American Physical Society (APS), is given for outstanding contributions to the advancement...

  18. Nomination & Selection Guidelines | U.S. DOE Office of Science (SC)

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

    Nomination & Selection Guidelines The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us Nomination & Selection Guidelines Print Text Size: A A A FeedbackShare Page Jump to: Nomination Guidelines | Fermi Award Assessment Criteria, Merit Review,

  19. SES Awards and Incentives

    Broader source: Energy.gov [DOE]

    The three SES award programs are:• Performance Awards;• Presidential Rank Awards; and• Other Awards 

  20. Awarded projects

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

    projects Awarded projects 2016 Allocation Awards This page lists the allocation awards for NERSC for the 2016 allocation year (Jan 12, 2016 through Jan 09, 2017). Read More » Previous Year Awards Last edited: 2016-04-29 11:35:1

  1. Award Types

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

    Award Types Types of Awards The Lab's mission is to develop and apply science and technology to ensure the safety, security, and reliability of the U.S. nuclear deterrent; reduce global threats; and solve other emerging national security and energy challenges. Contact Awards Team (505) 667-7824 Email Types of Awards The Awards Office, sponsored by the Technology Transfer Division and the Science and Technology Base Program Office, coordinates the Laboratory's submission process for many key

  2. Fermi arcs vs. fermi pockets in electron-doped perovskite iridates...

    Office of Scientific and Technical Information (OSTI)

    (China) Boston College, Chestnut Hill, MA (United States); Univ. of California, Santa Barbara, CA (United States) Publication Date: 2015-02-23 OSTI Identifier: 1188332 ...

  3. 2009 Awards

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

    9 Awards 2009 Awards 2009 Initial Allocations Awards The following table lists the initial allocation awards for NERSC for the 2009 allocation year (Jan 13, 2009 through Jan 11, 2010). The list is in alphabetical order by the last name of the Principal Investigator. Note - Letters following the repository name indicate the following: 'S' NERSC Startup award 'I' INCITE award A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Principal Site Request Repo MPP HPSS Project Title Investigator Id

  4. Richard L. Garwin, 1996 | U.S. DOE Office of Science (SC)

    Office of Science (SC) Website

    Richard L. Garwin, 1996 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life...

  5. Stafford L. Warren, 1971 | U.S. DOE Office of Science (SC)

    Office of Science (SC) Website

    Stafford L. Warren, 1971 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The...

  6. Lawrence Award

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

    Award. This is recognition of the work of many folks at Los Alamos as well as a broader set of colleagues and collaborators, and not just my own efforts," said Sarrao. The award...

  7. 2013 Awards

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

    Awards Print banner Home Agenda Awards Exhibitors Lodging Posters Registration T-Shirt Contest Transportation Workshops Contact Us User Meeting Archives Users' Executive Committee 2013 ALS User Meeting Awards The ALS Users' Executive Committee invites ALS users and staff to submit nominations in recognition of the people who have made significant contributions to the scientific and user support programs at the ALS. Nominations may be made for any or all of the following awards by filling out the

  8. Awards Recipients

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

    Awards Recipients Awards Recipients The Lab's mission is to develop and apply science and technology to ensure the safety, security, and reliability of the U.S. nuclear deterrent; reduce global threats; and solve other emerging national security and energy challenges. Contact Awards Team (505) 667-7824 Email Awards, peer recognition for Los Alamos National Laboratory employees (2009-present) We are proud of the many employees at Los Alamos who have built distinguished careers and receive

  9. HEDLP Awards | National Nuclear Security Administration

    National Nuclear Security Administration (NNSA)

    Plasmas HEDLP Awards 2015 Awards 2012 Awards Learn More 2015 HEDLP Awards 2012 HEDLP Awards

  10. SAGE Awards

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

    Awards SAGE Awards A National Science Foundation Research Experiences for Undergraduates program Contacts Institute Director Reinhard Friedel-Los Alamos SAGE Co-Director W. Scott Baldridge-Los Alamos SAGE Co-Director Larry Braile-Purdue University Professional Staff Assistant Georgia Sanchez (505) 665-0855 2000 Recipient of the Special Commendation Award of the Society of Exploration Geophysicists to Co-directors " ...in recognition of meritorious service rendered the scientific community,

  11. Sustainability Awards

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

    honors Los Alamos in 2014 Sustainability Awards December 3, 2014 Building and instrument efficiency, greenhouse gas reduction efforts noted LOS ALAMOS, N.M., Dec. 3, 2014-The National Nuclear Security Administration (NNSA) this week awarded 15 Sustainability Awards for innovation and excellence to its national laboratories and sites, and Los Alamos National Laboratory is among the winners, with honorees in both the Best in Class and Environmental Stewardship categories. "Los Alamos has

  12. Lytle Award

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

    Annual Farrel W. Lytle Award was established by the SSRL Users' Organization Executive Committee to promote important technical or scientific accomplishments in synchrotron radiation-based science and to foster collaboration and efficient use of beam time among users and staff at SSRL. The Lytle Award consists of a plaque that is displayed in the User Research Administration Office at SSRL and $1000. All SSRL users and staff are eligible for this award. The following people have previously

  13. President Obama Names Scientists Mildred Dresselhaus and Burton Richter as

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

    the Enrico Fermi Award Winners | Department of Energy Mildred Dresselhaus and Burton Richter as the Enrico Fermi Award Winners President Obama Names Scientists Mildred Dresselhaus and Burton Richter as the Enrico Fermi Award Winners January 11, 2012 - 3:31pm Addthis WASHINGTON, D.C. - President Obama has named Mildred S. Dresselhaus and Burton Richter as the winners of the Enrico Fermi Award, one of the government's oldest and most prestigious awards for scientific achievement. The

  14. 2011 Allocation Awards

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

    1 Awards 2011 Allocation Awards Last edited: 2013-11-18 13:33:36

  15. 2012 Allocation Awards

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

    2 Awards 2012 Allocation Awards Last edited: 2016-04-29 11:35:19

  16. 2013 Allocation Awards

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

    3 Awards 2013 Allocation Awards Last edited: 2016-04-29 11:34:55

  17. Awards Archive

    Broader source: Energy.gov [DOE]

    Here you'll find information about the geothermal technology research and development projects funded and grants that have been awarded prior to 2008 by the U.S. Department of Energy (DOE). The...

  18. Awards, Achievements

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

    Awards, Achievements Awards, Achievements The Lab's mission is to develop and apply science and technology to ensure the safety, security, and reliability of the U.S. nuclear deterrent; reduce global threats; and solve other emerging national security and energy challenges. Discoveries, developments, advancements, and inventions pouring from Los Alamos make America-and the world-a better and safer place. Roadrunner supercomputer Cray Inc. has delivered a new supercomputing platform to support

  19. Mortimer M. Elkind and H. Rodney Withers, 1996 | U.S. DOE Office...

    Office of Science (SC) Website

    Mortimer M. Elkind and H. Rodney Withers, 1996 The Enrico Fermi Award Fermi Award Home ... Mortimer M. Elkind and H. Rodney Withers, 1996 Print Text Size: A A A FeedbackShare Page ...

  20. Wolfgang K.H. Panofsky, 1978 | U.S. DOE Office of Science (SC...

    Office of Science (SC) Website

    Wolfgang K.H. Panofsky, 1978 The Enrico Fermi Award Fermi Award Home Nomination & ... Wolfgang K.H. Panofsky, 1978 Print Text Size: A A A FeedbackShare Page Citation For his ...

  1. ORISE: PeerNet® used to support DOE's Office of Science Enrico...

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

    ORAU PeerNet used to support DOE's Office of Science Enrico Fermi Award selection Peer ... U.S. Department of Energy's (DOE) Office of Science Enrico Fermi Award, a prestigious ...

  2. Robert R. Wilson, 1984 | U.S. DOE Office of Science (SC)

    Office of Science (SC) Website

    Robert R. Wilson, 1984 The Enrico Fermi Award Fermi Award Home Nomination & Selection ... Robert R. Wilson, 1984 Print Text Size: A A A FeedbackShare Page Citation For his ...

  3. Booth Awards - Hanford Site

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

    Health & Safety Exposition Booth Awards About Us Booth Awards Special Events Exhibitor Information What is EXPO Electronic Registration Form Booth Awards Email Email Page | Print...

  4. Silver Award - Hanford Site

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

    DOE Human Resources Management Division DOE Employment Recognition and Awards Program Gold Awards Silver Award Federal Employees Union (AFGE Local 788) Work Schedules Pay and...

  5. Q&A with Nobel Laureate Burton Richter

    Broader source: Energy.gov [DOE]

    Speaking with Nobel Prize Laureate and Fermi Award winner Dr. Burton Richter about his life in science.

  6. Steel Market Development Institute Awards "Community Hero" Award...

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

    Steel Market Development Institute Awards "Community Hero" Award to the Vehicle Technologies Office Steel Market Development Institute Awards "Community Hero" Award to the Vehicle ...

  7. Carrigan, Jr., Richard A. [Fermi National Accelerator Lab. (FNAL...

    Office of Scientific and Technical Information (OSTI)

    Accelerator Lab. (FNAL), Batavia, IL (United States) 43 PARTICLE ACCELERATORS; BEAM OPTICS; CHANNELING; ATTENUATION; BEAM EXTRACTION; BENDING; CRYSTALS; MESON BEAMS; BEAMS;...

  8. President Obama Names Scientists Bard and Sessler as Enrico Fermi...

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

    States and abroad and earned him a reputation as the "father of modern electrochemistry." ... and supporting a range of advances in biology, chemistry, physics and engineering. Dr. ...

  9. U.S. Department of Energy Fermi National Accelerator Laboratory...

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

    ... slightly better, and the system has been running 15% to ... pre-1984 chillers using Class I CFCs such as R-11. ... Change order mechanism: Because change orders can be costly ...

  10. Quantum phase transitions in Bose-Fermi systems

    SciTech Connect (OSTI)

    Petrellis, D.; Leviatan, A.; Iachello, F.

    2011-04-15

    Research Highlights: > We study quantum phase transitions in a system of N bosons and a single-j fermion. > Classical order parameters and correlation diagrams of quantum levels are determined. > The odd fermion strongly influences the location and nature of the phase transition. > Experimental evidence for the U(5)-SU(3) transition in odd-even nuclei is presented. - Abstract: Quantum phase transitions in a system of N bosons with angular momentum L = 0, 2 (s, d) and a single fermion with angular momentum j are investigated both classically and quantum mechanically. It is shown that the presence of the odd fermion strongly influences the location and nature of the phase transition, especially the critical value of the control parameter at which the phase transition occurs. Experimental evidence for the U(5)-SU(3) (spherical to axially-deformed) transition in odd-even nuclei is presented.

  11. Fermi Observations of GRB 090902B: A Distinct Spectral Component...

    Office of Scientific and Technical Information (OSTI)

    Cruz ; Axelsson, M. ; Stockholm U. Stockholm U., OKC ; Baldini, L. ; INFN, Pisa ; Ballet, J. ; DAPNIA, Saclay ; Barbiellini, G. ; INFN, Trieste Trieste U. ; Baring, M.G. ;...

  12. Fermi surface topology and hot spot distribution in the Kondo...

    Office of Scientific and Technical Information (OSTI)

    Authors: Neupane, Madhab ; Alidoust, Nasser ; Belopolski, Ilya ; Bian, Guang ; Xu, Su-Yang ; Kim, Dae-Jeong ; Shibayev, Pavel P. ; Sanchez, Daniel S. ; Zheng, Hao ; Chang, Tay-Rong ...

  13. Van der Waals Metal-Semiconductor Junction: Weak Fermi Level...

    Office of Scientific and Technical Information (OSTI)

    Sponsoring Org: USDOE SunShot Foundational Program to Advance Cell Efficiency (F-PACE) Country of Publication: United States Language: English Subject: 14 SOLAR ENERGY; 71 ...

  14. Kondo Polarons in a One-Dimensional Fermi Gas

    SciTech Connect (OSTI)

    Lamacraft, Austen

    2008-11-28

    We consider the motion of a spin-1/2 impurity in a one-dimensional gas of spin-1/2 fermions. For antiferromagnetic interaction between the impurity and the fermions, the low temperature behavior of the system is governed by the two-channel Kondo effect, leading to the impurity becoming completely opaque to the spin excitations of the gas. As well as the known spectral signatures of the two-channel Kondo effect, we find that the low temperature mobility of the resulting 'Kondo polaron' takes the universal form {mu}{yields}3({Dirac_h}/2{pi})v{sub F}{sup 2}/2{pi}k{sub B}{sup 2}T{sup 2}, in sharp contrast to the spinless case where {mu}{proportional_to}T{sup -4}.

  15. Fermi National Accelerator Laboratory October 2013 STEM Educational...

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

    to introduce youth to the world of science and trains college and university students in high-tech research and development. K-12 students FY2012 FY2013 K-12 teachers FY2012...

  16. Christopher T. [Fermi National Accelerator Laboratory, P.O. Box...

    Office of Scientific and Technical Information (OSTI)

    IL 60439-4815 (United States), E-mail: zachos@anl.gov 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COMPACTIFICATION; DUALITY; FERMIONS; GAUGE INVARIANCE; HOLOGRAPHY;...

  17. Fermi Observations of GRB 090902B: A Distinct Spectral Component...

    Office of Scientific and Technical Information (OSTI)

    Phys. Dept. ; Asano, K. ; Tokyo Inst. Tech. Tokyo Inst. Tech. ; Atwood, W.B. ; UC, Santa Cruz ; Axelsson, M. ; Stockholm U. Stockholm U., OKC ; Baldini, L. ; INFN, Pisa ;...

  18. DOE - Office of Legacy Management -- Fermi National Accelerator...

    Office of Legacy Management (LM)

    The Laboratorys current mission is to conduct research in high energy physics under the direction of the Department of Energy's Office of Science. Clean-up of contamination at ...

  19. U.S. Department of Energy Fermi National Accelerator Laboratory...

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

    The new 4500-ton cooling system is expected to use 40% less energy and is free of ozone-depleting chlorofluorocarbons (CFCs). The 3.5 million project (2.8 million before ...

  20. Anisotropic Fermi Surface and Quantum Limit Transport in High...

    Office of Scientific and Technical Information (OSTI)

    Additional Journal Information: Journal Volume: 5; Journal Issue: 3; Journal ID: ISSN 2160-3308 Publisher: American Physical Society Sponsoring Org: USDOE Office of Science (SC), ...

  1. Phase Imprinting in Equilibrating Fermi Gases: The Transience...

    Office of Scientific and Technical Information (OSTI)

    Publication Date: 2014-09-16 OSTI Identifier: 1180434 Type: Publisher's Accepted Manuscript Journal Name: Physical Review Letters Additional Journal Information: Journal Volume: ...

  2. GLAST Observatory Renamed for Fermi, Reveals Entire Gamma-Ray...

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

    As part of its support for particle physics research, DOE contributed funding to the ... Director of Science for High Energy Physics. "We look forward to the scientific ...

  3. Appendices and Risk Assessment Spreadsheet Version No. Fermi...

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

    The lead engineer will determine the degree of oversight you will need using a risk-based graded approach. On other occasions you will do design work as a member of a...

  4. Fermi Large Area Telescope Observations of the Supernova Remnant...

    Office of Scientific and Technical Information (OSTI)

    ... Authors: Ajello, M. ; Allafort, A. ; Stanford U., HEPL KIPAC, Menlo Park SLAC ; Baldini, L. ; INFN, Pisa ; Ballet, J. ; AIM, Saclay ; Barbiellini, G. ; INFN, Trieste Trieste ...

  5. Lawrence Livermore National Laboratory | Open Energy Information

    Open Energy Info (EERE)

    the 2007 Nobel Peace Prize Presidential Award for Excellence in Science, Mathematics and Engineering Mentoring, 2009 Enrico Fermi Awards Gordon Bell Prizes Presidential Early...

  6. NERSC 2013 awards

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

    3 awards NERSC 2013 awards December 14, 2012 by David Turner The NERSC 2013 awards have been posted. Subscribe via RSS Subscribe Browse by Date April 2016 January 2016 December ...

  7. Previous Year Awards

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

    Read More NERSC Initiative for Scientific Exploration (NISE) 2010 Awards In 2010 the NISE program awarded 27 projects a total of 35 million hours. Read More 2009 Awards This ...

  8. PM Workshop 2012 Awards Recognition - Secretary's Awards | Department of

    Energy Savers [EERE]

    Energy Workshop 2012 Awards Recognition - Secretary's Awards PM Workshop 2012 Awards Recognition - Secretary's Awards 2014 DOE Project Management Workshop PDF icon 29a_PM Workshop 2012 Awards Recognition.pdf More Documents & Publications 2012 Awards for Project Management Secretary's Achievement Award Secretary's 2014 Award of Excellence

  9. Fusion Power Associates Awards

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

    Fusion Power Associates Awards Fusion Power Associates is "a non-profit, tax-exempt research and educational foundation, providing information on the status of fusion development and other applications of plasma science and fusion research". The Association makes awards in four categories: Distinguished Career Awards, Leadership Awards, Excellence in Fusion Engineering, and Special Awards. Since 1987, Distinguished Career Awards have been presented "to individuals who have made

  10. 2015 Awarded Campaigns

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

    NIF Calendar Target Shot Metrics Call for Proposals 2014 Awarded Campaigns 2015 Awarded Campaigns Conflict of Interest Policy Jupiter Laser Facility Multimedia Photo Gallery Video ...

  11. 2016 Allocation Awards

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

    projects » 2016 Awards 2016 Allocation Awards L by Principal Investigator by DOE Office ast edited: 2016-04-29 11:34:3

  12. Awards | Argonne National Laboratory

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

    Performance Award, 2013 (with two other researchers) U.S. Department of Energy Vehicle Technologies Office R&D Award, 2013 Argonne National Laboratory Distinguished...

  13. 2015 Allocation Awards

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

    5 Awards 2015 Allocation Awards L by Principal Investigator by DOE Office ast edited: 2016-04-29 11:34:29

  14. Gold Awards - Hanford Site

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

    Site Wide Programs DOE Human Resources Management Recognition and Awards Program Gold Awards About Us DOE Human Resources Management Division DOE Employment Recognition and...

  15. NERSC 2015 Awards

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

    5 Awards NERSC 2015 Awards December 17, 2014 by Francesca Verdier Allocation awards for the 2015 allocation year, which begins on Jan. 13, 2015, have been posted at http://www.nersc.gov/users/accounts/awarded-projects/2015-allocation-awards/. Subscribe via RSS Subscribe Browse by Date May 2016 April 2016 January 2016 December 2015 November 2015 October 2015 September 2015 August 2015 July 2015 April 2015 March 2015 January 2015 December 2014 November 2014 October 2014 August 2014 June 2014 May

  16. 2013 User Meeting Awards

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

    3 User Meeting Awards Recipients of the 2013 Users' Executive Committee awards and the Student Poster Competition awards, were presented Tuesday, October 8, at the ALS User Meeting. David A. Shirley Award for Outstanding Scientific Achievement at the ALS 2013-shirley The David A. Shirley Award for Scientific Achievement went to Harald Ade, North Carolina State University, "For achievements in polymer science and in particular the elucidation of the chemical nano-morphology of complex

  17. Postdoc Awards, Prizes

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

    Awards, Prizes Postdoc Awards, Prizes Postdocs play a vital role in the LANL workforce and scientific programs, making significant contributions to science. Building a career at LANL is an option for postdocs and recognition can be received through several awards and prizes. Contact Postdoc Program Office Email Receive recognition through several awards, prizes Postdoc Distinguished Performance Awards (PDPAs) - Recognize individual or teams of no more than three who were major contributors

  18. WATCH: Secretary Chu Honors Drs. Dresselhaus and Richter with the Enrico

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

    Fermi Award | Department of Energy WATCH: Secretary Chu Honors Drs. Dresselhaus and Richter with the Enrico Fermi Award WATCH: Secretary Chu Honors Drs. Dresselhaus and Richter with the Enrico Fermi Award May 10, 2012 - 5:30pm Addthis Secretary of Energy Steven Chu honored Drs. Mildred Dresselhaus and Burton Richter as winners of the Enrico Fermi Award on Monday, May 7, 2012 in Washington, D.C. Amanda Scott Amanda Scott Former Managing Editor, Energy.gov What are the key facts? The Fermi

  19. Environmental waste disposal contracts awarded

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

    Environmental contracts awarded locally Environmental waste disposal contracts awarded locally Three small businesses with offices in Northern New Mexico awarded nuclear waste...

  20. Training Awards | Department of Energy

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

    Training Awards Training Awards Descriptions of the projects that will be managed by the Office of Fossil Energy's National Energy Technology Laboratory. PDF icon Training Awards ...

  1. Presidential Rank Award Winners | National Nuclear Security Administration

    National Nuclear Security Administration (NNSA)

    Presidential Rank Award Winners

  2. NREL Publications Win Awards

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

    Publications Win Awards For more information contact: e:mail: Public Affairs Golden, Colo., April 17, 1998 — Six publications written at the U.S. Department of Energy's National Renewable Energy Laboratory earned international awards from the Society for Technical Communications (STC). The awards were part of STC's International Technical Publications Competition. Fifteen publications (including the six international winners) also won awards in STC's Rocky Mountain Chapter's annual

  3. Other Organizations' Awards

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

    Other Organizations' Awards Members of the NIF & Photon Science Directorate have been honored with a variety of prestigious awards over the years. Below is a sampling. Name Year Granting Organization Name of Award and Citation Frederico Fiuza 2013 European Physical Society Plasma Physics Ph.D. Research Award for work on his doctoral thesis, "Multi-scale PIC Simulations of High Energy Density Scenarios: from Laboratory to Astrophysics." Frederic Perez 2012 European Physical Society

  4. Monetary Awards Scale

    Broader source: Energy.gov [DOE]

    Chart of the monetary awards scale allowed for intangible and tangible benefits from suggestions, inventions, special acts or services.

  5. American Physical Society Awards

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

    Physical Society Awards American Physical Society (APS) is one of the most important professional societies for gauging the quality of R&D done at the Laboratory. The APS sponsors a number of awards including the John Dawson Award of Excellence in Plasma Physics, James Clerk Maxwell Prize for Plasma Physics, as well as Dinstinguised Lectuerer and Doctoral Dissertation prizes. Name Year Name of Award and Citation Yu-hsin Chen 2012 Marshall N. Rosenbluth Outstanding Doctoral Thesis For

  6. Award_1_2

    Energy Savers [EERE]

    Department of Energy Award Selections for Industrial Technologies Program Recovery Act Funding Award Selections for Industrial Technologies Program Recovery Act Funding A chart detailling Award Selections for Industrial Technologies Program Recovery Act Funding Energy Efficient Information and Communication Technology (ICT) PDF icon Award Selections for Industrial Technologies Program Recovery Act Funding More Documents & Publications ITP_Data_Centers.xls QER - Comment of Information

  7. DeMichele Award

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

    "Chuck" Farrar to receive DeMichele Award November 21, 2012 Charles "Chuck" Farrar, leader of LANL's Engineering Institute, will receive the 2013 DeMichele Award from the Society for Experimental Mechanics. The award is presented for demonstrated "exemplary service and support of promoting the science and educational aspects of modal analysis technology" and is given annually at the International Modal Analysis Conference (IMAC). Farrar will receive the award at the

  8. 2015 Director's Awards

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

    2015 Director's Awards 2015 Director's Awards Print ALS staff took top honors in Lawrence Berkeley National Lab's 2015 Director's Awards for Exceptional Achievement and were recognized in a ceremony earlier this month. The ALS recipients comprised nearly half of this year's awardees, receiving recognition in the scientific, early scientific career, and safety categories. The Director's Awards honor individuals in both the scientific and operations divisions for their high achievement,

  9. User Meeting Awards

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

    User Meeting Awards web banner ALS User Meeting Awards See the 2013 User Meeting Awards Winners Home Agenda Awards Exhibitors Lodging Posters Registration Transportation Workshops This e-mail address is being protected from spambots. You need JavaScript enabled to view it User Meeting Archives Users' Executive Committee The ALS Users' Executive Committee invites ALS users and staff to submit nominations in recognition of the people who have made significant contributions to the scientific and

  10. User Meeting Awards

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

    User Meeting Awards Print web banner ALS User Meeting Awards See the 2013 User Meeting Awards Winners Home Agenda Awards Exhibitors Lodging Posters Registration Transportation Workshops This e-mail address is being protected from spambots. You need JavaScript enabled to view it User Meeting Archives Users' Executive Committee The ALS Users' Executive Committee invites ALS users and staff to submit nominations in recognition of the people who have made significant contributions to the scientific

  11. National Laser Users' Facility Grant Program Awards | National...

    National Nuclear Security Administration (NNSA)

    Program National Laser Users' Facility Grant Program Awards 2015 Awards 2012 Awards Learn More 2012 NLUF Awards 2015 NLUF Awards

  12. 2006 Initial Allocation Awards

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

    6 Awards 2006 Initial Allocation Awards The following table lists the allocation awards for NERSC for the 2006 allocation year (Dec 1, 2005 through Jan 8, 2007). The list is in alphabetical order by the last name of the Principal Investigator. Note - Letters following the repository name indicate the following: 'I' DOE ASCR INCITE award 'S' NERSC Startup award A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Principal Site Request Repo SP HPSS Project Title Investigator Id Hours SRUs Agarwal,

  13. 2007 Initial Allocation Awards

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

    7 Awards 2007 Initial Allocation Awards The following table lists the initial allocation awards for NERSC for the 2007 allocation year (Jan 9, 2007 through Jan 7, 2008). The list is in alphabetical order by the last name of the Principal Investigator. Note - Letters following the repository name indicate the following: 'I' DOE ASCR INCITE award 'S' NERSC Startup award A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Principal Site Request Repo SP HPSS Project Title Investigator Id Hours SRUs

  14. 2008 Initial Allocation Awards

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

    8 Awards 2008 Initial Allocation Awards The following table lists the allocation awards for NERSC for the 2008 allocation year (Jan 8, 2008 through Jan 12, 2009). The list is in alphabetical order by the last name of the Principal Investigator. Note - Letters following the repository name indicate the following: 'I' DOE ASCR INCITE award 'S' NERSC Startup award A B C D E F G H I J K L M N O P Q R S T U V W X Y Z Principal Site Request Repo SP HPSS Project Title Investigator Id Hours SRUs Adams,

  15. JLab Awarded Vice President's Hammer Award | Jefferson Lab

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

    Awarded Vice President's Hammer Award Jefferson Lab Awarded Vice President's Hammer Award The Directives Review Team at the Thomas Jefferson National Accelerator Facility (Jefferson Lab) has been awarded the Vice President's Hammer Award for its work on the simplification of the Environment, Health and Safety (EH&S) requirements given by the U.S. Department of Energy for Jefferson Lab. The Hammer Award is a special recognition given by Vice President Al Gore to teams who have made

  16. 1950's | U.S. DOE Office of Science (SC)

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

    's The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us Award Laureates 1950's Print Text Size: A A A FeedbackShare Page Laureates Glenn I. Seaborg, 1959 Eugene P. Wigner, 1958 Ernest 0. Lawrence, 1957

  17. Secretary's Achievment Award | Department of Energy

    Energy Savers [EERE]

    Achievment Award Secretary's Achievment Award PDF icon Office of Environmental Management K-33 gaseous Diffusion Process building Project.pdf More Documents & Publications Secretary's Achievement Award PM Workshop 2012 Awards Recognition - Secretary's Awards Secretary's Achievement Award

  18. Current Awards | National Nuclear Security Administration

    National Nuclear Security Administration (NNSA)

    Stewardship Science Academic Alliances Program Current Awards Current Awards Stewardship Science Academic Alliances (SSAA) Program Current Awards Under Construction

  19. Current Awards | National Nuclear Security Administration

    National Nuclear Security Administration (NNSA)

    National Laser User Facilities Program Current Awards Current Awards National Laser Users' Facility Grant Program Current Awards Under Construction

  20. Secretary's Achievement Award | Department of Energy

    Energy Savers [EERE]

    Science Daya Bay reactor Neutrino Detector Project.pdf More Documents & Publications 2012 Awards for Project Management PM Workshop 2012 Awards Recognition - Secretary's Awards Secretary's Achievement Award

  1. Secretary's Achievement Award | Department of Energy

    Energy Savers [EERE]

    Environmental Management Idaho Nuclear facility Decontamination & Decommissioning Project.pdf More Documents & Publications Secretary's Achievment Award Secretary's Achievement Award PM Workshop 2012 Awards Recognition - Secretary's Awards

  2. Early Career Awards

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

    Early Career Awards January 21, 2010 Grants to support innovation in basic science, energy security, climate change LOS ALAMOS, New Mexico, January 21, 2010-Five Los Alamos National Laboratory scientists have been awarded five-year research grants under the American Reinvestment and Recovery Act through the U.S. Department of Energy's prestigious Office of Science Early Career Research Program, Energy Secretary Steven Chu announced recently. The awards represent a significant investment of

  3. Ernest Orlando Lawrence Award

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

    Ernest Orlando Lawrence Award The Ernest Orlando Lawrence Award was established in 1959 in honor of a scientist who helped elevate American physics to world leadership. E. O. Lawrence was the inventor of the cyclotron, an accelerator of subatomic particles, and a 1939 Nobel Laureate in physics for that achievement. Each Lawrence Award category winner receives a citation signed by the Secretary of Energy, a gold medal bearing the likeness of Ernest Orlando Lawrence, and a $20,000 honorarium. Name

  4. NERSC 2012 awards

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

    2 awards NERSC 2012 awards December 8, 2011 by Francesca Verdier The NERSC 2012 awards have been posted. Subscribe via RSS Subscribe Browse by Date May 2016 April 2016 January 2016 December 2015 November 2015 October 2015 September 2015 August 2015 July 2015 April 2015 March 2015 January 2015 December 2014 November 2014 October 2014 August 2014 June 2014 May 2014 April 2014 March 2014 January 2014 December 2013 November 2013 October 2013 September 2013 August 2013 July 2013 June 2013 May 2013

  5. Awards & Honors - JCAP

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

    PAZ0093.JPG Awards & Honors Who We Are JCAP Mission JCAP At A Glance Fact Sheets Organizational Chart Recent Science Technology Transfer Awards & Honors Senior Management Scientific Leadership Researchers Governance & Advisory Boards Operations & Administration Who we are Overview JCAP Mission JCAP At A Glance Fact Sheets Organizational Chart Our Achievements Recent Science Technology Transfer Awards & Honors Our People Senior Management Scientific Leadership Researchers

  6. Fulbright Scholar Award

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

    researcher McDowell receives Fulbright Scholar Award August 31, 2010 Young scientist received earlier recognition from DOE for early-career research LOS ALAMOS, New Mexico, August 31, 2010-Los Alamos National Laboratory climate scientist Nathan G. McDowell recently received a Fulbright Scholar Award. With resources provided under the prestigious award, McDowell has temporarily left LANL for a 10-month stay in Slovenia, where he will present guest lectures at the University of Ljubljana and

  7. FY 2008 Financial Awards

    Broader source: Energy.gov [DOE]

    In 2008, DOE awarded funding to a number of science and research projects to support research, development, and demonstration of hydrogen and fuel cell technologies.

  8. Pollution Prevention Awards

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

    safety and security, or save money Each year projects are nominated and submitted for review. Best in Class and Environmental Stewardship Awards are presented during Earth Week...

  9. Postdoc Awards, Prizes

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

    that a mentor makes during a postdoc's appointment and who demonstrated a level of mentoring substantially beyond expectations. See PDMA Award Winners (pdf). Postdoctoral...

  10. Research Library Awards

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

    Shankar of the Research Library (STBPO-RL) and collaborators at Old Dominion University (Michael Nelson and Scott Ainsworth) won the 2010 Digital Preservation Award for Memento, a...

  11. NREL: Energy Storage - Awards

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

    Energy Storage Transportation Research Energy Storage Printable Version Awards R&D 100 2013 NREL's energy storage innovation has been recognized with numerous awards. R&D 100 Awards R&D 100 Awards are known in the research and development community as "the Oscars of Innovation." The work of NREL's energy storage team has been recognized with three of these top honors. Isothermal Battery Calorimeters (2013) NREL Team: Matthew Keyser, Ahmad Pesaran, John Ireland, Dirk Long,

  12. Zurek awarded Albert Einstein

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

    Zurek awarded Albert Einstein professorship prize July 30, 2010 LANL quantum theorist to serve as visiting professor at the University of Ulm LOS ALAMOS, New Mexico, July 30,...

  13. U.S. Department of Energys Office of Science

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

    Winners 7, 2009 Secretary Chu Names 2009 Enrico Fermi Award Winners University of Texas and Stanford University Professors to Share Presidential Award WASHINGTON, DC - US Energy Secretary Steven Chu has named Dr. John Bannister Goodenough and Dr. Siegfried S. Hecker as the winners of the Enrico Fermi Award, one of the most prestigious science and technology awards awarded by the U.S. Government. The Presidential award carries an honorarium of $375,000, which will be shared equally, and a

  14. EXPO Award Criteria - Hanford Site

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

    Award Criteria About Us Charging Your Time Committee Members Contact Us Electronic Registration Form Exhibitor and Vendor Information EXPO 2016 Sponsors EXPO Award Criteria How to Get to TRAC Special Events What is EXPO Why Should I Participate in EXPO EXPO Award Criteria Email Email Page | Print Print Page |Text Increase Font Size Decrease Font Size WRPS won the awards for Most Interactive and Best Overall booth! WRPS won the awards for Most Interactive and Best Overall booth! WCH won the award

  15. Sustainability Awards | Department of Energy

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

    Sustainability Awards Sustainability Awards Significant sustainability achievements at U.S. Department of Energy (DOE) facilities are recognized in several ways. DOE recognizes...

  16. Schoenborn wins Bau Neutron Award

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

    of LANL's Bioenergy and Biome Sciences group, to receive the 2016 Bau Neutron Diffraction Award. The award recognizes exceptional research achievement in neutron...

  17. Sustainability Awards | Department of Energy

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

    Sustainability Awards Sustainability Awards Significant sustainability achievements at U.S. Department of Energy (DOE) facilities are recognized in several ways. DOE recognizes ...

  18. 2015 User Meeting Award Recipients

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

    Light Source built. He is now retired from the lab. Sponsored by Berkeley Lab. Klaus Halbach Award for Innovative Instrumentation at the ALS The Klaus Halbach Award for...

  19. 2014 User Meeting Award Recipients

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

    Light Source built. He is now retired from the lab. Funded by Berkeley Lab. Klaus Halbach Award for Innovative Instrumentation at the ALS The Klaus Halbach Award for...

  20. 2012 ALS User Meeting Awards

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

    2012 ALS User Meeting Awards Print Recipients of the 2012 Users' Executive Committee awards and Student Poster Competition were announced Tuesday, October 9, at the ALS User...

  1. 2012 ALS User Meeting Awards

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

    2 ALS User Meeting Awards Recipients of the 2012 Users' Executive Committee awards and Student Poster Competition were announced Tuesday, October 9, at the ALS User Meeting. David...

  2. Current Awards | National Nuclear Security Administration

    National Nuclear Security Administration (NNSA)

    Current Awards Stewardship Science Academic Alliances (SSAA) Program Current Awards Under Construction

  3. Current Awards | National Nuclear Security Administration

    National Nuclear Security Administration (NNSA)

    Current Awards National Laser Users' Facility Grant Program Current Awards Under Construction

  4. Ernest D. Courant, 1986 | U.S. DOE Office of Science (SC)

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

    Ernest D. Courant, 1986 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 1980's Ernest D. Courant, 1986 Print Text Size: A A A FeedbackShare Page Citation For his many contributions, for over three

  5. Hans A. Bethe, 1961 | U.S. DOE Office of Science (SC)

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

    Hans A. Bethe, 1961 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 1960's Hans A. Bethe, 1961 Print Text Size: A A A FeedbackShare Page Citation For contributions to nuclear and theoretical physics,

  6. Harold M. Agnew, 1978 | U.S. DOE Office of Science (SC)

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    's » Harold M. Agnew, 1978 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 1970's Harold M. Agnew, 1978 Print Text Size: A A A FeedbackShare Page Citation For his many and innovative contributions

  7. Herbert Anderson, 1982 | U.S. DOE Office of Science (SC)

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    Herbert Anderson, 1982 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 1980's Herbert Anderson, 1982 Print Text Size: A A A FeedbackShare Page Citation For his pioneering collaboration with Enrico

  8. Herbert F. York, 2000 | U.S. DOE Office of Science (SC)

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    Herbert F. York, 2000 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 2000's Herbert F. York, 2000 Print Text Size: A A A FeedbackShare Page Citation For his contributions to formulating and

  9. William L. Russell, 1976 | U.S. DOE Office of Science (SC)

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    William L. Russell, 1976 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 1970's William L. Russell, 1976 Print Text Size: A A A FeedbackShare Page Citation For his outstanding contributions during a

  10. ALSNews Vol. 365

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

    Obama Honors Former LBNL Director Shank with Enrico Fermi Award The Skinny on Skin Molecular Sunscreen: How DNA Protects Itself from UV Light Doudna Shares Gruber Genetics...

  11. Norman Rasmussen, 1985 | U.S. DOE Office of Science (SC)

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    Norman Rasmussen, 1985 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 1980's Norman Rasmussen, 1985 Print Text Size: A A A FeedbackShare Page Citation In recognition of his pioneering contributions

  12. Norris E. Bradbury, 1970 | U.S. DOE Office of Science (SC)

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    Norris E. Bradbury, 1970 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 1970's Norris E. Bradbury, 1970 Print Text Size: A A A FeedbackShare Page Citation For his inspiring leadership and superb

  13. John A. Wheeler, 1968 | U.S. DOE Office of Science (SC)

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    John A. Wheeler, 1968 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 1960's John A. Wheeler, 1968 Print Text Size: A A A FeedbackShare Page Citation For his pioneering contributions to understanding

  14. John Bannister Goodenough, 2009 | U.S. DOE Office of Science (SC)

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

    John Bannister Goodenough, 2009 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 2000's John Bannister Goodenough, 2009 Print Text Size: A A A FeedbackShare Page Citation For his lasting contributions

  15. John N. Bahcall and Raymond Davis, Jr., 2003 | U.S. DOE Office of Science

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

    (SC) John N. Bahcall and Raymond Davis, Jr., 2003 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 2000's John N. Bahcall and Raymond Davis, Jr., 2003 Print Text Size: A A A FeedbackShare Page

  16. John S. Foster, 1992 | U.S. DOE Office of Science (SC)

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    John S. Foster, 1992 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 1990's John S. Foster, 1992 Print Text Size: A A A FeedbackShare Page Citation For his outstanding contributions to national

  17. John von Neumann, 1956 | U.S. DOE Office of Science (SC)

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    John von Neumann, 1956 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 1950's John von Neumann, 1956 Print Text Size: A A A FeedbackShare Page Citation For his scientific contribution to the theory

  18. Robley D. Evans, 1990 | U.S. DOE Office of Science (SC)

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    Robley D. Evans, 1990 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 1990's Robley D. Evans, 1990 Print Text Size: A A A FeedbackShare Page Citation For pioneering work in nuclear medicine, in

  19. Rudolf E. Peierls, 1980 | U.S. DOE Office of Science (SC)

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

    Rudolf E. Peierls, 1980 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 1980's Rudolf E. Peierls, 1980 Print Text Size: A A A FeedbackShare Page Citation In recognition of his many path breaking

  20. Mildred S. Dresselhaus, 2010 | U.S. DOE Office of Science (SC)

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

    Mildred S. Dresselhaus, 2010 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 2010's Mildred S. Dresselhaus, 2010 Print Text Size: A A A FeedbackShare Page Citation For leadership in condensed matter

  1. Volunteers | U.S. DOE Office of Science (SC)

    Office of Science (SC) Website

    Sheldon Datz, 2000 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 2000's Sheldon Datz, 2000 Print Text Size: A A A FeedbackShare Page Citation For his career in chemistry and atomic physics, the

  2. Charles V. Shank, 2014 | U.S. DOE Office of Science (SC)

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

    Charles V. Shank, 2014 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 2010's Charles V. Shank, 2014 Print Text Size: A A A FeedbackShare Page Senior Fellow, Howard Hughes Medical Institute, and

  3. Manson Benedict, 1972 | U.S. DOE Office of Science (SC)

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

    Manson Benedict, 1972 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 1970's Manson Benedict, 1972 Print Text Size: A A A FeedbackShare Page Citation For his highly effective work in the design and

  4. Martin D. Kamen, 1995 | U.S. DOE Office of Science (SC)

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

    Martin D. Kamen, 1995 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 1990's Martin D. Kamen, 1995 Print Text Size: A A A FeedbackShare Page Citation For his discovery of carbon-14 and its

  5. Luis Alvarez, 1987 | U.S. DOE Office of Science (SC)

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

    's » Luis Alvarez, 1987 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 1980's Luis Alvarez, 1987 Print Text Size: A A A FeedbackShare Page Citation For the importance and breadth of his pioneering

  6. Shields Warren, 1971 | U.S. DOE Office of Science (SC)

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

    Shields Warren, 1971 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 1970's Shields Warren, 1971 Print Text Size: A A A FeedbackShare Page Citation For the imaginative, prescient, and vigorous

  7. 2010 | U.S. DOE Office of Science (SC)

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

    0 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 2010's 2010 Print Text Size: A A A FeedbackShare Page On May 7, 2012 it was conferred upon two exceptional scientists: Dr. Mildred Dresselhaus,

  8. Fritz Strassmann, 1966 | U.S. DOE Office of Science (SC)

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

    Fritz Strassmann, 1966 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 1960's Fritz Strassmann, 1966 Print Text Size: A A A FeedbackShare Page Citation For contributions to nuclear chemistry and

  9. George A. Cowan, 1990 | U.S. DOE Office of Science (SC)

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

    George A. Cowan, 1990 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 1990's George A. Cowan, 1990 Print Text Size: A A A FeedbackShare Page Citation For accomplishments in the development of

  10. George Vendryes, 1984 | U.S. DOE Office of Science (SC)

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

    George Vendryes, 1984 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 1980's George Vendryes, 1984 Print Text Size: A A A FeedbackShare Page Citation For his outstanding contributions in research on

  11. H.G. Rickover, 1964 | U.S. DOE Office of Science (SC)

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

    H.G. Rickover, 1964 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 1960's H.G. Rickover, 1964 Print Text Size: A A A FeedbackShare Page Citation For engineering and demonstrative leadership in the

  12. Victor F. Weisskopf, 1988 | U.S. DOE Office of Science (SC)

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

    Victor F. Weisskopf, 1988 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 1980's Victor F. Weisskopf, 1988 Print Text Size: A A A FeedbackShare Page Citation For many unique contributions to particle

  13. W. Bennett Lewis, 1981 | U.S. DOE Office of Science (SC)

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

    W. Bennett Lewis, 1981 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 1980's W. Bennett Lewis, 1981 Print Text Size: A A A FeedbackShare Page Citation For his dedicated support of heavy water

  14. Alexander Hollaender, 1983 | U.S. DOE Office of Science (SC)

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

    Alexander Hollaender, 1983 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 1980's Alexander Hollaender, 1983 Print Text Size: A A A FeedbackShare Page Citation For his unique role in the creation of

  15. Allen J. Bard, 2013 | U.S. DOE Office of Science (SC)

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

    Allan Manuel About Us Allan Manuel - Deputy CIO for Enterprise Policy, Portfolio Management & Governance

    Allen J. Bard, 2013 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 2010's Allen J.

  16. Alvin M. Weinberg, 1980 | U.S. DOE Office of Science (SC)

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

    Alvin M. Weinberg, 1980 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 1980's Alvin M. Weinberg, 1980 Print Text Size: A A A FeedbackShare Page Citation In recognition of his pioneering

  17. Andrew Sessler, 2013 | U.S. DOE Office of Science (SC)

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

    Andrew Sessler, 2013 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 2010's Andrew Sessler, 2013 Print Text Size: A A A FeedbackShare Page Citation For advancing accelerators as powerful tools of

  18. Arthur H. Rosenfeld, 2005 | U.S. DOE Office of Science (SC)

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

    Arthur H. Rosenfeld, 2005 The Enrico Fermi Award Fermi Award Home Nomination & Selection Guidelines Award Laureates 2010's 2000's 1990's 1980's 1970's 1960's 1950's Ceremony The Life of Enrico Fermi Contact Information The Enrico Fermi Award U.S. Department of Energy SC-2/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-2411 E: Email Us 2000's Arthur H. Rosenfeld, 2005 Print Text Size: A A A FeedbackShare Page Citation For a lifetime of achievement ranging

  19. Secretary's 2013 Achievement Awards | Department of Energy

    Energy Savers [EERE]

    Awards Secretary's 2013 Achievement Awards PDF icon Berkeley Laboratory Laser Accelerator Project (Office of Science) More Documents & Publications Secretary's 2013 Achievement Awards Secretary's 2013 Achievement Awards Secretary's 2014 Achievement Awards

  20. Secretary's 2014 Achievement Awards | Department of Energy

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

    Secretary's 2014 Achievement Awards Secretary's 2014 Achievement Awards PDF icon Energy Sciences Building (ESB) Project (Office of Science) More Documents & Publications 2014 Awards for Project Management Secretary's 2013 Achievement Awards Secretary's 2014 Achievement Awards

  1. Workshops and Awards | Department of Energy

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

    Project Management » Project Management Awards » Workshops and Awards Workshops and Awards Awards for Project Management Excellence Awards for 2015 (Presented at the 2016 Project Management Workshop) Awards for 2014 (Presented at the 2015 Project Management Workshop) Awards for 2013 (Presented at the 2014 Project Management Workshop) Awards for 2012 Awards for 2011 (Presented at the 2012 Project Management Workshop) The 2012 Secretary's Award of Excellence The Office of Science Building 51 and

  2. Havrilla wins Birks Award

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

    Havrilla wins Birks Award Havrilla wins Birks Award This award is given to individuals who have made outstanding contributions to the X-ray spectrometry field. September 23, 2014 George Havrilla George Havrilla Havrilla been working in X-ray spectroscopy for more than 30 years. His expertise is in micro-X-ray fluorescence, confocal micro X-ray fluorescence, small volume and dried residue sampling, ultra-high energy X-ray fluorescence, and high resolution X-ray (hiRX). George Havrilla of LANL's

  3. NREL's Keith Emery Awarded Prestigious Cherry Award - News Releases |

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

    NREL NREL's Keith Emery Awarded Prestigious Cherry Award Top PV award goes to researcher who brought credibility to testing of solar cells and modules June 19, 2013 An engineer from the Energy Department's National Renewable Energy Laboratory (NREL) whose testing and characterization laboratory brings credibility to the measurement of efficiency of solar cells and modules has been awarded the prestigious William R. Cherry Award by the Institute of Electrical and Electronics Engineers (IEEE).

  4. Presidential Early Career Awards for Scientists and Engineers Award

    Office of Science (SC) Website

    Ceremony Introduction | U.S. DOE Office of Science (SC) Transcribed Media Home » About » Honors and Awards » PECASE » 2012 » Presidential Early Career Awards for Scientists and Engineers Award Ceremony Introduction Transcribed Media Contact Information Office of Science U.S. Department of Energy 1000 Independence Ave., SW Washington, DC 20585 P: (202) 586-5430 2012 Presidential Early Career Awards for Scientists and Engineers Award Ceremony Introduction Print Text Size: A A A

  5. 2015 Housing Innovation Awards

    Broader source: Energy.gov [DOE]

    The U.S. Department of Energy’s (DOE) Housing Innovation Awards recognize the very best in innovation on the path to zero energy ready homes. DOE Zero Energy Ready Home (ZERH) Housing Innovation...

  6. SOLICITATION, OFFER AND AWARD

    Office of Environmental Management (EM)

    DATA X M EVALUATION FACTORS FOR AWARD X H SPECIAL CONTRACT REQUIREMENTS OFFER (Must be ... Transfer as described in Contract Clause H.42 Uranium Transfer, to this contract is ...

  7. EERE Postdoctoral Research Awards

    Broader source: Energy.gov [DOE]

    The Energy Efficiency and Renewable Energy (EERE) Postdoctoral Research Awards support EEREs mission in energy efficiency and renewable energy by offering recent Ph.D. recipients the opportunity...

  8. Previous Solicitation Awards

    Broader source: Energy.gov [DOE]

    Here you'll find information about the geothermal technology research and development projects funded and grants that have been awarded by the U.S. Department of Energy (DOE).

  9. 2014 DOE Sustainability Awards

    Broader source: Energy.gov [DOE]

    The 2014 U.S. Department of Energy (DOE) Sustainability Awards continues efforts to recognize teams and individuals for their outstanding contributions to the Department’s sustainability mission, including accomplishments in managing pollution, waste, energy, water, and vehicle fleets.

  10. Distinguished Alumni Award

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

    Chavez has received the Ernest Orlando Lawrence Award from the DOE, placing him in an elite group at Caltech that includes Richard Feynman. Chavez is an invited professor at the...

  11. honors and awards

    National Nuclear Security Administration (NNSA)

    Defense Programs Award of Excellence for their help in securing supply of a critical material for the Departments of Energy and Defense.

    The four Pantexans, Tod Botcher,...

  12. CHP Awards Announced

    SciTech Connect (OSTI)

    2010-05-01

    The U.S. Department of Energy Industrial Technologies Program has selected six projects for financial awards under the "Combined Heat and Power Systems Technology Development and Demonstration" solicitation (DE-FOA-0000016).

  13. NREL: Wind Research - Awards

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

    Awards NREL has received many awards for its technical innovations in wind energy. In addition, the research conducted at the National Wind Technology Center (NWTC) at NREL has led the development of patented state-of-the-art technologies that are available for licensing. Learn more about patents and licensing opportunities. Patents Research conducted at the NWTC during the last decade has earned NREL two patents, one for adaptive pitch control and one for a resonance blade test system that will

  14. Undergraduate's Goldwater Award

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

    Center Objective The Science Center Publications Graduate Research opportunities Undergraduate research opportunities EFRC-501 graduate class Seminar schedules Center News Research Highlights Center Research News Media about Center Center Video Library Bisfuel Picture Gallery Undergraduate's Goldwater Award 11 Apr 2011 Michael Kenney, a junior working in the Gust group, is one of 275 individuals in the nation to win the Goldwater Scholarship this year. This is the premier award for

  15. Building Awards | NREL

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

    Building Awards NREL's high-performance buildings are sustainability models for the use of energy efficiency and renewable energy technologies. Each building on NREL's South Table Mountain campus is designed to meet the Gold or Platinum standards of the U.S. Green Building Council's Leadership in Energy and Environmental Design (LEED®) program. Find information about awards for NREL's exceptional buildings below. Energy Systems Integration Facility Energy Systems Integration Facility 2014

  16. MPA Fellows and Awards

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

    PADSTE » ADEPS » MPA » Fellows, Awards MPA Fellows and Awards We develop new technologies that solve pressing national energy and security challenges by exploring and exploiting materials and their properties; developing practical applications of materials, and providing world-class user facilities. Contact Us Division Leader Antoinette Taylor Email Deputy Division Leader Rick Martineau (acting) Email Chief of Staff Jeff Willis Email Division Office (505) 665-1131 Nine Los Alamos National

  17. Czanderna Receives Research Award

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

    Czanderna Receives Research Award For more information contact: e:mail: Public Affairs Golden, Colo., May 5, 1999 — A scientist at the U.S. Department of Energy's National Renewable Energy Laboratory (NREL) was recognized for his contributions to the science and technology of energy-related research. The Energy Technology Division (ETD) of The Electrochemical Society selected Dr. Al Czanderna for its Fourth Research Award in recognition of his outstanding solar research. During his 21-year

  18. American Physical Society awards

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

    awards fellowships to Los Alamos scientists December 18, 2012 American Physical Society Awards Fellowships to Los Alamos Scientists LOS ALAMOS, NEW MEXICO, December 18, 2012-Ten scientists at Los Alamos National Laboratory are being inducted into the ranks of fellowship in the American Physical Society (APS) for 2012. The criterion for election as an APS Fellow is exceptional contributions to the physics enterprise; such as performing outstanding physics research, important applications of

  19. Awards | Argonne National Laboratory

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

    Awards Each year, Argonne National Laboratory and many of its world-class scientists and engineers are recognized for their outstanding talents and the innovative technologies they develop with their research teams and in association with industry partners. Argonne researchers have received or been recognized by: R&D 100 Awards: Each year, R&D Magazine recognizes the 100 most technologically significant new products of the last year. The competition has two purposes: to recognize

  20. 2012 ALS User Meeting Awards

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

    2 ALS User Meeting Awards Recipients of the 2012 Users' Executive Committee awards and Student Poster Competition were announced Tuesday, October 9, at the ALS User Meeting. David A. Shirley Award for Outstanding Scientific Achievement at the ALS shirley award The David A. Shirley Award for Scientific Achievement went to, from left, Carl Percival (University of Manchester), Dudley Shallcross [(University of Bristol) not pictured], and Craig Taatjes and David Osborn (Sandia), for making the first

  1. 2011 User Meeting Award Recipients

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

    2011 User Meeting Award Recipients Print Recipients of the 2011 Users' Executive Committee awards, Student Poster Competition awards, and Photography Contest awards were announced Tuesday, October 4th at the ALS User Meeting. Winners are pictured below with UEC Chair David Obsorn. David A. Shirley Award for Outstanding Scientific Achievement at the ALS Dr. Subrata Chakraborty, for "the design and execution of the most important and difficult experiment relevant to understanding the origin

  2. 2011 User Meeting Award Recipients

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

    Award Recipients Recipients of the 2011 Users' Executive Committee awards, Student Poster Competition awards, and Photography Contest awards were announced Tuesday, October 4th at the ALS User Meeting. Winners are pictured below with UEC Chair David Obsorn. David A. Shirley Award for Outstanding Scientific Achievement at the ALS Dr. Subrata Chakraborty, for "the design and execution of the most important and difficult experiment relevant to understanding the origin and evolution of the

  3. Aviation Management Professional Award Nomination for: | Department...

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

    Aviation Management Professional Award Nomination for: Aviation Management Professional Award Nomination for: PDF icon Aviation Management Professional Award Nomination for: More ...

  4. Selected Past Financial Awards | Department of Energy

    Office of Environmental Management (EM)

    Financial Opportunities Past Opportunities Selected Past Financial Awards Selected Past Financial Awards Since 2003, DOE has awarded funding to a number of science and ...

  5. Department of Energy 2013 Sustainability Awards Information ...

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

    3 Sustainability Awards Information Department of Energy 2013 Sustainability Awards Information Flyer list 2013 Sustainability Awards nomination and category information. PDF icon ...

  6. 2016 DOE Sustainability Awards Information Sheet | Department...

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

    2016 DOE Sustainability Awards Information Sheet 2016 DOE Sustainability Awards Information Sheet Provides information about the 2016 DOE Sustainability Awards nomination process. ...

  7. AWARD FEE DETERMINATION SCORECARD Contractor: Restoration Services...

    Office of Environmental Management (EM)

    Basis of Evaluation: FY14 Award Fee Plan for Restoration Services, Inc.; Portsmouth Environmental Technical Services II Award Fee Available: 349,708.00 Award Fee Earned:...

  8. honors and awards | National Nuclear Security Administration

    National Nuclear Security Administration (NNSA)

    awards from the National Association of Government Communicators (NAGC) Blue Pencil and Gold Screen Awards Competition Los Alamos Field Office Safety Systems expert earns DOE award...

  9. NREL: Awards and Honors - R&D 100 Awards

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

    Printable Version R&D 100 Awards Since its inception as the Solar Energy Research Institute (SERI) in 1977, NRELSERI has won 57 R&D 100 awards. 2014 Direct Monocrystalline Silicon...

  10. DOE Early Career awards

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

    reactions and climate uncertainties earn Los Alamos scientists DOE Early Career awards May 10, 2013 LOS ALAMOS, N.M., May 10, 2013-Two Los Alamos National Laboratory researchers are among the 61 national recipients of the Energy Department's Early Career Research Program awards for 2013. Marian Jandel won for his proposal, "New Data on Neutron Reactions Relevant to Basic and Applied Science," selected by the Office of Nuclear Physics. Nathan M. Urban will be supported for his work on

  11. ESnet awarded honorable mention

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

    ESnet's OSCARS Selected for Honorable Mention by U.C. 2011 Larry L. Sautter Award News & Publications ESnet News Media & Press Publications and Presentations Galleries ESnet Awards and Honors Contact Us Media Jon Bashor, jbashor@lbl.gov, +1 510 486 5849 or Media@es.net Technical Assistance: 1 800-33-ESnet (Inside the US) 1 800-333-7638 (Inside the US) 1 510-486-7600 (Globally) 1 510-486-7607 (Globally) Report Network Problems: trouble@es.net Provide Web Site Feedback: info@es.net ESnet's

  12. Awards | Jefferson Lab

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

    Awards Awards December 7, 2011 There can be long discussions about how society rewards people. One form of reward is the pay one takes home in exchange for work done. In fact, for most people that is the most relevant reward. But there are others. In mediaeval times the King might reward a subject with a title, make him a knight, have people address him with the honorific "Sir." This kind of system persists in some countries; the United Kingdom has a fairly complex system, some of

  13. Departmental Awards | Department of Energy

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

    is a special award designed to recognize superior or exemplary service by a Facility ... is a special award designed to recognize superior or exemplary service by an employee who ...

  14. Advanced Vehicle Technologies Awards Table

    Broader source: Energy.gov [DOE]

    The table contains a listing of the applicants, their locations, the amounts of the awards, and description of each project.

  15. Awards | National Nuclear Security Administration

    National Nuclear Security Administration (NNSA)

    Awards ASC researcher, Dr. Kurt B. Ferreira from Sandia National Laboratories, received a 2015 IEEE Technical Committee on Scalable Computing Award for Excellence for Early Career Researchers. The award is bestowed on individuals who have made outstanding, influential, and potentially long-lasting contributions in the field of scalable computing within five years of receiving their PhD degree. The 2015 E.O. Lawrence Award was conferred on Dr. Christopher L. Fryer from Los Alamos National

  16. Scientific and Organizational Awards | NREL

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

    Scientific and Organizational Awards NREL's facility and staff are regularly recognized by scientific societies and community and government organizations. Find awards and honors by category below. Scientific and Technical Society Honors and Awards Scientific and technical society fellows are listed below, along with recent awards. American Association for the Advancement of Science 2015 Fellow -Brian Gregg 2014 Fellow - David S. Ginley 2013 Fellow - Martin Keller 2011 Fellow - Stanley Bull 2003

  17. Terwilliger honored with ACA Award

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

    Terwilliger honored with ACA Award Terwilliger honored with ACA Award Tom Terwilliger is the recipient of the Trueblood Award from the American Crystallographic Association (ACA). August 6, 2013 Tom Terwilliger Tom Terwilliger The Trueblood award is established in memory of Professor Kenneth N. Trueblood of UCLA, who was a major force in the early use of computers and the development of crystallographic computer programs. Tom Terwilliger of LANL's Biosecurity and Public Health group is the

  18. EERE Postdoctoral Research Award Participants | Department of...

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

    Participants EERE Postdoctoral Research Award Participants PDF icon 20112012postdoctoralresearchparts.pdf More Documents & Publications EERE Postdoctoral Research Award ...

  19. Argonne receives 2014 Illinois Governor's Sustainability Award...

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

    receives 2014 Illinois Governor's Sustainability Award By Else Tennessen * November 10, ... Illinois Sustainable Technology Center's 2014 Illinois Governor's Sustainability Award. ...

  20. awards | netl.doe.gov

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

    awards R&D Magazine: R&D 100 Awards: The Awards, widely recognized as the "Oscars of Innovation," identifies and celebrates the top high technology products of the year. Sophisticated testing equipment, innovative new materials, chemistry breakthroughs, biomedical products, consumer items, high-energy physics: the R&D 100 Awards spans industry, academia, and government-sponsored research. NETL R&D 100 Awards Won: 2013 BlackGold® Nanocoating During aircraft operation,

  1. 2014 Awarded Campaigns

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

    users / call for proposals 2014 Awarded Campaigns Metastability of dynamically compressed C Wark (Oxford) High pressure phases of carbon Hemley (Carnegie) Pressure ionization at extreme densities Neumayer (GSI) Direct-drive hydrodynamics Casner (CEA) Asymptotic self-similar instabilities Shvarts (Israel) Charged particle stopping powers Zylstra (MIT) Stellar and Big Bang nucleosynthesis Gatu-Johnson (MIT) Magnetogenesis and B field amplification Gregori (Oxford) Collisionless astrophysical

  2. 2009 Technology Transfer Awards

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

    9 Technology Transfer Awards Los Alamos National Laboratory, an affirmative action/equal opportunity employer, is operated by Los Alamos National Security, LLC, for the National Nuclear Security Administration of the U.S.Department of Energy under contract DE-AC52-06NA25396. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise does not necessarily constitute or imply its endorsement, recommendation, or favoring by the Los

  3. SOLICITATION, OFFER AND AWARD

    National Nuclear Security Administration (NNSA)

    Section B Page 1 of 2 Mod 001 1. SERVICES BEING ACQUIRED The contractor shall be responsible for planning, managing, and executing work described in Section C. This work is entirely in support of the Naval Nuclear Propulsion Program. The contract consists of the following phases: 1. Transition Period (beginning on award date). a. For the Bettis sites the transition period ends on January 31, 2009. b. For the Knolls sites the transition period ends on February 1, 2009. 2. Initial Operating Phase

  4. SOLICITATION, OFFER AND AWARD

    National Nuclear Security Administration (NNSA)

    Section B Page 1 of 2 1. SERVICES BEING ACQUIRED The contractor shall be responsible for planning, managing, and executing work described in Section C. This work is entirely in support of the Naval Nuclear Propulsion Program. The contract consists of the following phases: 1. Transition Period (estimated to be award date through January 31, 2009). 2. Initial Operating Phase (estimated to be February 1, 2009 through September 30, 2013). 3. Five year Option Period in accordance with the clause

  5. 2011 DOE Sustainability Awards | Department of Energy

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

    1 DOE Sustainability Awards 2011 DOE Sustainability Awards The 2011 U.S. Department of Energy (DOE) Sustainability Awards* recognized teams and individuals for outstanding contributions to energy, water, and vehicle fleet management and associated cost savings at DOE facilities in fiscal year 2011. In addition, awards were also presented for projects that represented exemplary sustainability practices. Award categories included: Individual Exceptional Service Award Team Program Awards Team

  6. DOE & Headquarters Awards | Department of Energy

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

    & Headquarters Awards DOE & Headquarters Awards Departmental Awards November 13, 2014 Facility Representative of the Year Award The Facility Representative Award Program is a special award designed to recognize superior or exemplary service by a Facility Representative over a period of one year. This special award program has been established in accordance with the requirements of Department of Energy (DOE) Order 331.1C, Employee Performance Management and Recognition Program. November

  7. Housing Innovation Awards | Department of Energy

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

    Zero Energy Ready Home » Housing Innovation Awards Housing Innovation Awards HIA Awards.JPG Since 2013, The U.S. Department of Energy's (DOE) Housing Innovation Awards has recognized the very best in innovation on the path to zero energy ready homes. The Housing Innovation Awards recognize forward-thinking builders for delivering American homebuyers with the home of the future, today. Explore these award winning homes on the Tour of Zero. The 2016 Housing Innovation Awards will be held

  8. DOE Fuel Cell Awards 2003 | Department of Energy

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

    Awards 2003 DOE Fuel Cell Awards 2003 DOE Awards for Fuel Cell and Hydrogen Production, Storage, and Sensor Technologies Awarded in 2003 PDF icon doefcawards03.pdf More ...

  9. Rooftop Solar Challenge Award Winners | Department of Energy

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

    Rooftop Solar Challenge Award Winners Rooftop Solar Challenge Award Winners Select an Awardee Return to map Rooftop Solar Challenge II Award Winners Award Winner Headquarters

  10. Fensin receives Young Leaders Award

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

    Fensin receives Young Leaders Award March 3, 2016 Saryu Fensin of LANL's Materials Science in Radiation and Dynamics Extremes group has been selected to receive the 2015 TMS Young Leaders International Scholar- Japanese Institute of Metals (JIM) Award. She will represent the Minerals, Metals & Materials Society (TMS) at the JIM Spring Annual Meeting at the Tokyo University of Science in Japan and present her research. The award is part of the TMS Young Leaders International Scholar Program,

  11. Schoenborn wins Bau Neutron Award

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

    Schoenborn wins Bau Neutron Award Schoenborn wins Bau Neutron Award The American Crystallographic Association (ACA) has selected retired Laboratory Senior Fellow Benno Schoenborn to receive the 2016 Bau Neutron Diffraction Award. August 12, 2015 Benno Schoenborn Benno Schoenborn Communications Office (505) 667-7000 Schoenborn is honored for his pioneering research in macromolecular neutron crystallography and the design and development of the neutron crystallography beamline (Protein

  12. Boyer wins Meritorious Service Award

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

    Boyer wins Meritorious Service Award from INMM September 5, 2013 The Institute of Nuclear Materials Management (INMM) honored Brian D. Boyer of the Laboratory's Systems Design and Analysis group at the 54th Annual Meeting with an Edway R. Johnson Meritorious Service Award for his technical research in international safeguards and his mentoring of university students and young professionals in nuclear materials management. This lifetime achievement award is a significant recognition of Boyer's

  13. NREL'S Zunger Receives Scientific Award

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

    Scientific Award For more information contact: Kerry Masson 303-275-4083 email: Kerry Masson Golden, Colo., Aug. 18, 2000 - Alex Zunger, a leading scientist and research fellow at the U.S. Department of Energy's National Renewable Energy Laboratory, has been named the 2001 recipient of the prestigious John Bardeen award from The Minerals, Metals and Materials Society (TMS). The annual award recognizes "an individual who has made an outstanding contribution and is a leader in the field of

  14. Other United States Government Awards

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

    Other United States Government Awards As a Department of Energy (DOE) national laboratory, LLNL tracks achievements recognized by awards from the DOE. These awards span a wide range of accomplishments and include recognition of exemplary programmatic achievements. . Name Year Citation Dexter Lenoir, Rochelle Aguilar, Ramon Martinez, Erik Simmons, Chelle Blocker, Camerino Gutierrez, Joseph Chilton, Janet Cortez, Gary Brown, Judith Juarez, Sobhana Singh, Ronald Washington, Lorraine Rivera, Dana

  15. Borup wins Electrochemical Society Award

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

    Borup wins Electrochemical Society Award Borup wins Electrochemical Society Award Rod Borup has won the 2015 Research Award presented annually by the Energy Technology Division of the Electrochemical Society. January 26, 2015 Rod Borup Rod Borup Borup and his team are focused on improving the polymer electrolyte membrane (PEM) fuel cell, which converts hydrogen to electricity for power, but emits only water. Rod Borup of Materials Synthesis and Integrated Devices (MPA-11) has won the 2015

  16. 2012 NISE Awards Summary Table

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

    Awards » 2012 NISE Summary Table 2012 NISE Awards Summary Table Investigator NERSC repo Hours awarded DOE Office Project Title Gilbert Compo, University of Colorado at Boulder m958 10,000,000 BER Climate Research Ocean-Atmosphere Reanalysis for Climate Applications (OARCA) 1850-2013 Silvia Crivelli, Lawrence Berkeley National Laboratory m1532 1,550,000 BER Biological Systems Science WeFold: A collaborative effort for protein structure prediction Thomas Hamill, National Oceanic & Atmospheric

  17. 2013 HPC Achievement Award Recipients

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

    2013 Recipients 2013 HPC Achievement Award Recipients 2013 Award Recipients The Department of Energy's National Energy Research Scientific Computing Center (NERSC) announced the winners of their inaugural High Performance Computing (HPC) Achievement Awards on Wednesday at the annual NERSC User Group meeting at the Lawrence Berkeley National Laboratory (Berkeley Lab). The awardees are all NERSC users who have either demonstrated an innovative use of HPC resources to solve a scientific problem, or

  18. 2013 NISE Awards Summary Table

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

    Awards » 2013 NISE Summary Table 2013 NISE Awards Summary Table Investigator NERSC repo Hours awarded DOE Office Project Title Katie Antypas, Lawrence Berkeley National Laboratory m1759 250,000 ASCR Applied Mathematical Sciences NERSC Application Readiness for Future Architectures Inez Fung, University of California Berkeley m189 750,000 BER Climate and Environmental Sciences Carbon Data Assimilation with a Coupled Ensemble Kalman Filter Thomas Hamill, National Oceanic & Atmospheric

  19. Coutts Earns Prestigious Research Award

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

    Coutts Earns Prestigious Research Award For more information contact: e:mail: Public Affairs Golden, Colo., July 8, 1999 — A research fellow at the U.S. Department of Energy's National Renewable Energy Laboratory was selected recently for a major award from the American Vacuum Society (AVS). Dr. Timothy J. Coutts won the 1999 John A. Thornton Memorial Award because of his "...innovative research, teaching and technical leadership in optimizing and applying thin-film photovoltaics (solar

  20. GreenGov Presidential Award

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

    GreenGov Presidential Award The Idaho National Laboratory and DOE's Idaho Operations Office were honored at the recent GreenGov Presidential Awards ceremony in the Executive Office Building in Washington, D.C. The award was for the many sustainable improvements in fleet management and the bus system the INL has made. These have resulted in reduced petroleum use, greenhouse gas emissions and costs. Idaho attendees include, (from left to right): Robert Gallegos (DOE-Idaho), Debbie Tate and Scott