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Sample records for mirror experiment photo

  1. Photo of the Week: Inside the Tandem Mirror Experiment | Department of

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

    Energy Tandem Mirror Experiment Photo of the Week: Inside the Tandem Mirror Experiment December 28, 2012 - 2:22pm Addthis This 1978 photo shows two workers inside the Mirror Fusion Test Facility, a magnetic confinement fusion device designed and built at Lawrence Livermore National Laboratory. In this experiment, magnetic mirrors are placed at both ends of a central magnetic tube. Very hot and dense plasmas inside each mirror enhanced the confinement of another plasma inside the central

  2. Photo of the Week: The Mirror Fusion Test Facility | Department of Energy

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

    The Mirror Fusion Test Facility Photo of the Week: The Mirror Fusion Test Facility July 19, 2013 - 4:17pm Addthis This 1981 photo shows the Mirror Fusion Test Facility (MFTF), an experimental magnetic confinement fusion device built using a magnetic mirror at Lawrence Livermore National Laboratory (LLNL). The MFTF functioned as the primary research center for mirror fusion devices. The design consisted of a 64-meter-long vacuum vessel fitted with 26 coil magnets bonding the center of the vessel

  3. Photo of the Week | Department of Energy

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

    Photo of the Week Photo of the Week Addthis Inside the Tandem Mirror Experiment 1 of 28 Inside the Tandem Mirror Experiment This 1978 photo shows two workers inside the Mirror Fusion Test Facility, a magnetic confinement fusion device designed and built at Lawrence Livermore National Laboratory. In this experiment, magnetic mirrors are placed at both ends of a central magnetic tube. Very hot and dense plasmas inside each mirror enhanced the confinement of another plasma inside the central tube,

  4. Photos

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

    Photos Photos High-quality photos speak more than a thousand words about our science and technology, community outreach, collaborations, careers, and much more. News Releases Science Briefs Photos Picture of the Week Publications Social Media Videos Fact Sheets PHOTOS BY TOPIC Careers Community Visitors Environment History Science The Lab PICTURE OF THE WEEK View the latest pictures highlighted weekly by the Lab. LANL IMAGES Click thumbnails to enlarge. Photos arranged by most recent first,

  5. Photos

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

    Photos Photos LynnRippe.jpg Lynn Rippe NERSCPoster1.jpg NERSC Poster (February 2001 NUG Meeting) ESNetPoster1.jpg ESNet Poster (February 2001 NUG Meeting) MeetinagArea1.jpg The...

  6. DOE - NNSA/NFO -- Photo Library Subcritical experiments

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

    Subcritical Experiments NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - Subcritical experiments The underground U1a Complex is the location for subcritical experiments. Subcritical experiments are physics experiments that obtain technical information to help the National Laboratories maintain the safety and reliability of the U.S. nuclear weapons stockpile. Instructions: Click the photograph THUMBNAIL to view the photograph details Click the Category, Number, or

  7. Photo Galleries | Department of Energy

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

    to a Clean Energy Future SunShot Grand Challenge SunShot Grand Challenge Inside the Tandem Mirror Experiment Photo of the Week Franklin County Courthouse (Before) Franklin...

  8. Summary of results from the Tandem Mirror Experiment (TMX)

    SciTech Connect (OSTI)

    Simonen, T.C.

    1981-02-26

    This report summarizes results from the successful experimental operation of the Tandem Mirror Experiment (TMX) over the period October 1978 through September 1980. The experimental program, summarized by the DOE milestones given in Table 1-1, had three basic phases: (1) an 8-month checkout period, October 1978 through May 1979; (2) a 6-month initial period of operation, June through November 1979, during which the basic principles of the tandem configuration were demonstrated (i.e., plasma confinement was improved over that of a single-cell mirror); and (3) a 10-month period, December 1979 through September 1980, during which the initial TMX results were corroborated by additional diagnostic measurements and many detailed physics investigations were carried out. This report summarizes the early results, presents results of recent data analysis, and outlines areas of ongoing research and data analysis which will be reported in future journal publications.

  9. New simulation capability for gamma ray mirror experiments

    SciTech Connect (OSTI)

    Descalle, Marie-Anne; Ruz-Armendariz, Jaime; Decker, Todd; Brejhnolt, Nicolai; Pivovaroff, Michael

    2015-09-28

    This report provides a description of the simulation toolkit developed at Lawrence Livermore National Laboratory to support the design of nuclear safeguards experiments using grazing incidence multilayer mirrors in the energy band of uranium (U) and plutonium (Pu) emission lines. This effort was motivated by the data analysis of a scoping experiment at the Irradiated Fuels Examination Facility (IFEL) at Oak Ridge National Laboratory in FY13 and of a benchmark experiment at the Idaho National Laboratory (INL) in FY14 that highlighted the need for predictive tools built around a ray-tracing capability. This report presents the simulation toolkit and relevant results such as the simulated spectra for TMI, MOX, and ATM106 fuel rods based on spent fuel models provided by Los Alamos National Laboratory and for a virgin high 240Pu-content fuel plate, as well as models of the IFEL and INL experiments implemented in the ray tracing tool. The beam position and height were validated against the INL ~60 keV americium data. Examples of alternate configurations of the optics or experimental set-up illustrate the future use of the simulation suite to guide the next IFEL experimental campaign.

  10. Field Experience with 3-Sun Mirror Module Systems

    SciTech Connect (OSTI)

    Fraas, Dr. Lewis; Avery, James E.; Huang, H,; Minkin, Leonid M; Fraas, J. X.; Maxey, L Curt; Gehl, Anthony C

    2008-01-01

    JX Crystals 3-sun PV mirror modules have now been operating in four separate systems in the field for up to 2 years. Two post-mounted 2-axis tracking arrays of 12 modules each were installed at the Shanghai Flower Park in April of 2006. Then 672 modules were installed in a 100 kW array on N-S horizontal beam trackers at the Shanghai Flower Port in November of 2006. Finally, sets of 4 modules were installed on azimuth-tracking carousels on buildings at the Oak Ridge National Lab and at the U. of Nevada in Las Vegas in late 2007. All of these modules in each of these systems are still operating at their initial power ratings. No degradation in performance has been observed. The benefit of these 3-sun PV mirror modules is that they use 1/3 of the silicon single-crystal cell material in comparison to traditional planar modules. Since aluminum mirrors are much cheaper than high-purity single-crystal silicon-cells, these modules and systems should be much lower in cost when manufactured in high volume.

  11. Drawings and Photos

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

    Drawings and Photos: Hutch 1 SAXS Camera Users experiments Misc Click links for images

  12. Neutral Beam Injection Experiments and Related Behavior of Neutral Particles in the GAMMA 10 Tandem Mirror

    SciTech Connect (OSTI)

    Nakashima, Y. [Plasma Research Center, University of Tsukuba (Japan); Watanabe, K. [Plasma Research Center, University of Tsukuba (Japan); Higashizono, Y. [Plasma Research Center, University of Tsukuba (Japan); Ohki, T. [Plasma Research Center, University of Tsukuba (Japan); Ogita, T. [Plasma Research Center, University of Tsukuba (Japan); Shoji, M. [National Institute for Fusion Science(Japan); Kobayashi, S. [Institute of Advanced Energy, Kyoto University (Japan); Islam, M.K. [Plasma Research Center, University of Tsukuba (Japan); Kubota, Y. [Plasma Research Center, University of Tsukuba (Japan); Yoshikawa, M. [Plasma Research Center, University of Tsukuba (Japan); Kobayashi, T. [Plasma Research Center, University of Tsukuba (Japan); Yamada, M. [Plasma Research Center, University of Tsukuba (Japan); Murakami, R. [Plasma Research Center, University of Tsukuba (Japan); Cho, T. [Plasma Research Center, University of Tsukuba (Japan)

    2005-01-15

    Results of neutral beam injection (NBI) experiments in the GAMMA 10 tandem mirror plasmas are presented together with the neutral particle behavior observed in the experiments. A hydrogen neural beam was injected into the hot-ion-mode plasmas by using the injector installed in the central-cell for the plasma heating and fueling. High-energy ions produced by NBI were observed and its energy distribution was measured for the first time with a neutral particle analyzer installed in the central-cell. The temporal and spatial behavior of hydrogen was observed with axially aligned H{sub {alpha}} detectors installed from the central midplane to anchor-cell. Enhancement of hydrogen recycling due to the beam injection and the cause of the observed decrease in plasma diamagnetism are discussed. The Monte-Carlo code DEGAS for neutral transport simulation was applied to the GAMMA 10 central-cell and a 3-dimensional simulation was performed in the NBI experiment. Localization of neutral particle during the beam injection is investigated based on the simulation and it was found that the increased recycling due to the beam injection was dominant near the injection port.

  13. Bob Ellis designs a PPPL first: A 3D printed mirror for microwave...

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

    Gallery: Completed stainless steel and copper mirror system. (Photo by Elle StarkmanPPPL Office of Communications) Completed stainless steel and copper mirror system. When ...

  14. Numerical experiment to estimate the validity of negative ion diagnostic using photo-detachment combined with Langmuir probing

    SciTech Connect (OSTI)

    Oudini, N.; Sirse, N.; Ellingboe, A. R.; Benallal, R.; Taccogna, F.; Bendib, A.

    2015-07-15

    This paper presents a critical assessment of the theory of photo-detachment diagnostic method used to probe the negative ion density and electronegativity α = n{sub -}/n{sub e}. In this method, a laser pulse is used to photo-detach all negative ions located within the electropositive channel (laser spot region). The negative ion density is estimated based on the assumption that the increase of the current collected by an electrostatic probe biased positively to the plasma is a result of only the creation of photo-detached electrons. In parallel, the background electron density and temperature are considered as constants during this diagnostics. While the numerical experiments performed here show that the background electron density and temperature increase due to the formation of an electrostatic potential barrier around the electropositive channel. The time scale of potential barrier rise is about 2 ns, which is comparable to the time required to completely photo-detach the negative ions in the electropositive channel (∼3 ns). We find that neglecting the effect of the potential barrier on the background plasma leads to an erroneous determination of the negative ion density. Moreover, the background electron velocity distribution function within the electropositive channel is not Maxwellian. This is due to the acceleration of these electrons through the electrostatic potential barrier. In this work, the validity of the photo-detachment diagnostic assumptions is questioned and our results illustrate the weakness of these assumptions.

  15. Photo Gallery

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

    Photo Gallery: April 8, 2007 April 15, 2007 March 21, 2010: Photos Videos April 11, 2010 Nov. 18, 2012 (video)...

  16. Class Photos

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

    Class Photos Class Photos Bringing together top, space science students with internationally recognized researchers at Los Alamos in an educational and collaborative atmosphere....

  17. Class Photos

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

    Class Photos Class Photos Bringing together top space science students with ... Request more information Email Class of 2015 students and mentors Space Weather School ...

  18. Photo Gallery

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

    Photo Gallery Miscellaneous Gallery 1 Gallery 2 Gallery 3 Banquet CAMD Tour

  19. Mirror mount

    DOE Patents [OSTI]

    Kuklo, Thomas C.; Bender, Donald A.

    1994-01-01

    A unique lens or mirror mount having adjustable constraints at two key locations to allow for "X" and "Y" tilts of the mirror only. The device uses two pair of flexures of a type such that the pivots of the mirror gimble are rigidly fixed in all planes allowing the device to have zero stacking tolerance and zero wear over time.

  20. PPPL engineers build mirror mechanism using 3D printer and off-the-shelf

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

    parts | Princeton Plasma Physics Lab engineers build mirror mechanism using 3D printer and off-the-shelf parts By Raphael Rosen November 23, 2015 Tweet Widget Google Plus One Share on Facebook Mirror Mechanism Prototype (Photo by Mike Messineo) Mirror Mechanism Prototype Gallery: Mirror Mechanism Prototype (Photo by Mike Messineo) Mirror Mechanism Prototype At the Princeton Plasma Physics Laboratory, the spirit of tinkering lives. This past summer a team of engineers invented a mechanical

  1. PPPL engineers build mirror mechanism using 3D printer and off-the-shelf

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

    parts | Princeton Plasma Physics Lab PPPL engineers build mirror mechanism using 3D printer and off-the-shelf parts By Raphael Rosen November 23, 2015 Tweet Widget Google Plus One Share on Facebook Mirror Mechanism Prototype (Photo by Mike Messineo) Mirror Mechanism Prototype Gallery: Mirror Mechanism Prototype (Photo by Mike Messineo) Mirror Mechanism Prototype At the Princeton Plasma Physics Laboratory, the spirit of tinkering lives. This past summer a team of engineers invented a

  2. Mirror mount

    DOE Patents [OSTI]

    Kuklo, T.C.; Bender, D.A.

    1994-10-04

    A unique lens or mirror mount having adjustable constraints at two key locations to allow for ''X'' and ''Y'' tilts of the mirror only is disclosed. The device uses two pair of flexures of a type such that the pivots of the mirror gimble are rigidly fixed in all planes allowing the device to have zero stacking tolerance and zero wear over time. 4 figs.

  3. Stock Photos

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

    Stock-Photos Sign In About | Careers | Contact | Investors | bpa.gov Search Policy & Reporting Expand Policy & Reporting EE Sectors Expand EE Sectors Technology & Innovation...

  4. SAGE Photo Gallery

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

    Photo Gallery SAGE Photo Gallery 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 Image Image Participants of SAGE 2000 deploy cables and geophones during a seismic survey. Veritas DGC Inc., an industrial sponsor of SAGE, provided Vibroseis trucks (seen in

  5. Mirror mount

    DOE Patents [OSTI]

    Humpal, Harold H.

    1987-01-01

    A mirror mount (10) is provided that allows free pitch, yaw and roll motion of the mirror (28) while keeping the location of a point (56) on the surface of the mirror (28) fixed in the rest frame of reference of the mount (10). Yaw movement is provided by two yaw cylinders (30,32) that are bearing (52) mounted to provide rotation. Pitch and roll motion is provided by a spherically annular shell (42) that is air bearing (72,74) mounted to move between a clamp (60) and an upper pedestal bearing (44). The centers of curvature of the spherical surfaces of the shell (42) lie upon the point (56). Pitch motion and roll motion are separately and independently imparted to mirror (28) by a pair of pitch paddles (34) and a pair of roll paddles (36) that are independently and separately moved by control rods (76,80) driven by motors (78,82).

  6. Mirror mount

    DOE Patents [OSTI]

    Humpal, H.H.

    1987-11-10

    A mirror mount is provided that allows free pitch, yaw and roll motion of the mirror while keeping the location of a point on the surface of the mirror fixed in the rest frame of reference of the mount. Yaw movement is provided by two yaw cylinders that are bearing mounted to provide rotation. Pitch and roll motion is provided by a spherically annular shell that is air bearing mounted to move between a clamp and an upper pedestal bearing. The centers of curvature of the spherical surfaces of the shell lie upon the point. Pitch motion and roll motion are separately and independently imparted to mirror by a pair of pitch paddles and a pair of roll paddles that are independently and separately moved by control rods driven by motors. 5 figs.

  7. Mirror mount

    DOE Patents [OSTI]

    Humpal, H.H.

    1986-03-21

    A mirror mount is provided that allows free pitch, yaw and roll motion of the mirror while keeping the location of a point on the surface of the mirror fixed in the rest frame of reference of the mount. Yaw movement is provided by two yaw cylinders that are bearing mounted to provide rotation. Pitch and roll motion is provided by a spherically annular shell that is air bearing mounted to move between a clamp and an upper pedestal bearing. The centers of curvature of the spherical surfaces of the shell lie upon the point. Pitch motion and roll motion are separately and independently imparted to mirror by a pair of pitch paddles and a pair of roll paddles that are independently and separately moved by control rods driven by motors.

  8. Fokker-Planck equation in mirror research

    SciTech Connect (OSTI)

    Post, R.F.

    1983-08-11

    Open confinement systems based on the magnetic mirror principle depend on the maintenance of particle distributions that may deviate substantially from Maxwellian distributions. Mirror research has therefore from the beginning relied on theoretical predictions of non-equilibrium rate processes obtained from solutions to the Fokker-Planck equation. The F-P equation plays three roles: Design of experiments, creation of classical standards against which to compare experiment, and predictions concerning mirror based fusion power systems. Analytical and computational approaches to solving the F-P equation for mirror systems will be reviewed, together with results and examples that apply to specific mirror systems, such as the tandem mirror.

  9. Photo Gallery

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

    Laser Bay <h3>Cleaning the Roving Mirror Diagnostic Enclosure</h3>Transport & Handling's Paul Bonifacio uses a polyester cleanroom tool called an "Alpha mop" to precision-wipe the interior of a Roving Mirror Diagnostic Enclosure (RMDE) during the June 2016 Facility Maintenance and Reconfiguration period. Replacement of the RMDE roving calorimeters is followed by cleanliness sampling for particles and organics. Test shots fired to the RMDE calorimeters can assess many

  10. Mirror monochromator

    SciTech Connect (OSTI)

    Mankos, Marian; Shadman, Khashayar

    2014-12-02

    In this SBIR project, Electron Optica, Inc. (EOI) is developing a mirror electron monochromator (MirrorChrom) attachment to new and retrofitted electron microscopes (EMs) for improving the energy resolution of the EM from the characteristic range of 0.2-0.5 eV to the range of 10-50 meV. This improvement will enhance the characterization of materials by imaging and spectroscopy. In particular, the monochromator will refine the energy spectra characterizing materials, as obtained from transmission EMs [TEMs] fitted with electron spectrometers, and it will increase the spatial resolution of the images of materials taken with scanning EMs (SEMs) operated at low voltages. EOIs MirrorChrom technology utilizes a magnetic prism to simultaneously deflect the electron beam off the axis of the microscope column by 90 and disperse the electrons in proportional to their energies into a module with an electron mirror and a knife-edge. The knife-edge cuts off the tails of the energy distribution to reduce the energy spread of the electrons that are reflected, and subsequently deflected, back into the microscope column. The knife-edge is less prone to contamination, and thereby charging, than the conventional slits used in existing monochromators, which improves the reliability and stability of the module. The overall design of the MirrorChrom exploits the symmetry inherent in reversing the electron trajectory in order to maintain the beam brightness a parameter that impacts how well the electron beam can be focused downstream onto a sample. During phase I, EOI drafted a set of candidate monochromator architectures and evaluated the trade-offs between energy resolution and beam current to achieve the optimum design for three particular applications with market potential: increasing the spatial resolution of low voltage SEMs, increasing the energy resolution of low voltage TEMs (beam energy of 5-20 keV), and increasing the energy resolution of conventional TEMs (beam energy of

  11. Class Photos

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

    Class Is Now in Session: Energy 101 Class Is Now in Session: Energy 101 August 19, 2013 - 11:49am Addthis Students from the University of Maryland's Designing a Sustainable World course, a class based on the Energy Department's Energy 101 Course Framework, present their end-of-year design projects. | Photo courtesy of the University of Maryland. Students from the University of Maryland's Designing a Sustainable World course, a class based on the Energy Department's Energy 101 Course Framework,

  12. Photo Gallery

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

    Historic Lasers <h3>Argus Laser Bay</h3>The two-beam Argus laser came online In 1976. Use of Argus increased knowledge about laser propagation limits and helped LLNL Laser Program researchers develop technologies needed for the next generation of laser fusion systems.<br/><br/><a href="content/assets/images/media/photo-gallery/large/nif-1109-17874.jpg" target="_blank">Download hi-res image</a><br/><a

  13. Photo Gallery

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

    Construction <h3>Victor Reis</h3>Victor Reis, the Assistant Secretary for the Department of Energy's Defense Programs, played a key leadership role in the 1990s in defining the emerging Stockpile Stewardship Program and the need for the National Ignition Facility.<br/><br/><a href="content/assets/images/media/photo-gallery/large/nif-1209-18052.jpg" target="_blank">Download hi-res image</a><br/><a

  14. Photo Gallery

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

    Other <h3>Testing the Power Conditioning System</h3>Power conditioning operator Seth Robinson conducts tests in one of the four NIF capacitor bays. The capacitor bays house NIF's power conditioning system, which delivers 400 megajoules of stored electrical energy to the laser system's 7,680 flashlamps. Credit: Damien Jemison.<br/><br/><a href="content/assets/images/media/photo-gallery/large/2013-046658.jpg" target="_blank">Download hi-res

  15. Results from CEBAF experiment E89-012: Measurements of deuteron photo-disintegration up to 4 GeV

    SciTech Connect (OSTI)

    Mike Miller; David Abbott; Abdellah Ahmidouch; Chris Armstrong; John Arrington; K. A. Assamagan; Oliver K. Baker; S. P. Barrow; D. P. Beatty; D. H. Beck; S. Y. Beedoe; Elizabeth Beise; J. E. Belz; 0 C. W. Bochna; Peter Bosted; Ed Brash; Herbert Breuer; R. V. Cadman; Larry Cardman; Roger Carlini; Jinseok Cha; Nicholas Chant; G. Collins; C. Cothran; W. J. Cummings; Samuel Danagoulian; F. A. Duncan; J. A. Dunne; Dipangkar Dutta; Tom Eden; Rolf Ent; Bradley Filippone; Tony A. Forest; H. T. Fortune; Valera V. Frolov; Haiyan Gao; Donald Geesaman; Ron Gilman; Paul Gueye; Kenneth Gustafsson; Jens-Ole Hansen; M. Harvey; Wendy Hinton; R. J. Holt; Hal Jackson; Cynthia Keppel; M. A. Khandaker; Ed Kinney; Andi Klein; 0 Doug Koltenuk; Gerfried Kumbartzki; Allison Lung; David Mack; Richard Madey; Pete Markowitz; Kenneth McFarlane; Robert McKeown; David Meekins; Z-E. Meziani; J. H. Mitchell; Hamlet Mkrtchyan; R. M. Mohring; James Napolitano; Alan Nathan; Gabriel Niculescu; Ioana Niculescu; Tom O'Neill; B. R. Owen; S. Pate; Dave Potterveld; John Price; G. L. Rakness; Ronald Ransome; Juerg Reinhold; Paul Rutt; G. Savage; Ralph Segel; N. Simicevic; Paul Stoler; Riad Suleiman; Liguang Tang; B. P. Terburg; D. Van Westrum; Bill Vulcan; S. E. Williamson; Michael Witkowski; Stephen Wood; Chen Yan; Ben Zeidman

    1997-05-01

    The first measurements of differential cross sections for deuteron photo-disintegration at photon energies up to 4 GeV were performed at the Thomas Jefferson National Accelerator Facility early in 1996. Cross section results for D(gamma,p)n at proton center of mass angle of 35{sup o}, 53{sup o} and 90{sup o} will be presented. These results are in good agreement with previous measurements at low energy and extend to higher energies where data were previously unavailable. The 90{sup o} degree data show behavior consistent with the constituent counting rules up to 4 GeV and are also in fair agreement with the asymptotic meson exchange model. The 37{sup o} and 53{sup o} data do not show clear signs of counting rule behavior, although a threshold in transverse momentum for the onset of scaling cannot be excluded.

  16. PPPL extends system for suppressing instabilities to long-pulse experiments

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

    on KSTAR | Princeton Plasma Physics Lab PPPL extends system for suppressing instabilities to long-pulse experiments on KSTAR By John Greenwald March 18, 2014 Tweet Widget Google Plus One Share on Facebook A look into the microwave launcher showing the steering mirrors that guide the beam into the plasma. (Photo by PPPL) A look into the microwave launcher showing the steering mirrors that guide the beam into the plasma. PPPL collaborations have been instrumental in developing a system to

  17. PPPL extends system for suppressing instabilities to long-pulse experiments

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

    on KSTAR | Princeton Plasma Physics Lab PPPL extends system for suppressing instabilities to long-pulse experiments on KSTAR By John Greenwald March 19, 2014 Tweet Widget Google Plus One Share on Facebook A look into the microwave launcher showing the steering mirrors that guide the beam into the plasma. (Photo by PPPL) A look into the microwave launcher showing the steering mirrors that guide the beam into the plasma. PPPL collaborations have been instrumental in developing a system to

  18. Photos | Department of Energy

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

    Photos Photos Addthis Collegiate Wind Competition 1 of 124 Collegiate Wind Competition May 01, 2015- College students compete in the 2015 Collegiate Wind Competition held at NREL's ...

  19. Photos & Multimedia - Hanford Site

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

    Newsroom Photos & Multimedia Office of River Protection About ORP ORP Projects & Facilities Newsroom Photos & Multimedia ORP Events Press Releases Contracts & Procurements Contact ...

  20. Bob Ellis designs a PPPL first: A 3D printed mirror for microwave launchers

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

    | Princeton Plasma Physics Lab Bob Ellis designs a PPPL first: A 3D printed mirror for microwave launchers By John Greenwald October 28, 2014 Tweet Widget Google Plus One Share on Facebook Bob Ellis with a 3D-printed plastic prototype for a non-mirror part of the launcher. (Photo by Elle Starkman/PPPL Office of Communications) Bob Ellis with a 3D-printed plastic prototype for a non-mirror part of the launcher. Gallery: Completed stainless steel and copper mirror system. (Photo by Elle

  1. ALS Staff Photo

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

    Staff Photo Print On May 14, 2013, members of ALS staff posed for a group photo in front of the dome. A hi-res version can be downloaded here. The last staff photo was taken in 2006. 2013 staff photo

  2. Photo of the Week: Supercomputing... from Space | Department...

    Office of Environmental Management (EM)

    ... The simulator will mimic the environment that the telescope will experience in operational orbit, more than 1 million miles from Earth. | Photo credit: Chris GunnNASA. Photo of ...

  3. The influence of impurity and particle control on TMX-U (Tandem Mirror Experiment Upgrade) plasma operation

    SciTech Connect (OSTI)

    Allen, S.L.; Yu, T.L.; Foote, J.H.; Pickles, W.L.

    1985-11-01

    A variety of techniques are used in TMX-U to control impurities and reflux: repeated plasma pulses, glow discharge cleaning (GDC), and gettering. A series of experiments under three different plasma-wall conditions was performed: no wall conditioning after a machine maintenance cycle, a glow-discharge-cleaned wall, and a gettered wall. Several plasma diagnostics to determine the effect of these procedures on TMX-U plasma parameters were used. Spectroscopic measurements indicated that GDC reduced impurities and increased the electron temperature, enabling full-duration beam-sustained plasma operation without a large number of repeated plasma pulses. Gettering further reduced the impurities and the neutral pressure, and this improved condition persisted for several shots after gettering was stopped. Measurements from residual gas analyzers and an end-loss ion spectrometer indicated that hydrogen is present in the plasma during the initial deuterium operation after pumpdown; the hydrogen level decreased after plasma operation with gettering, indicating reduced wall recycling.

  4. Photo Gallery

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

    Diagnostics <h3>High Energy Imaging Diagnostic</h3>Diagnostic technician Bowdi Helgesen installs a debris shield collar on the nose cone of the NIF High Energy Imaging Diagnostic (HEIDI) in the Optics Support Bldg. diagnostics factory. This device captures target debris from high energy density (HED) strength campaign experiments around the HEIDI diagnostic. It is intended to trap material entering the diagnostic and to block target debris from reaching frequently accessed diagnostic

  5. Photo Gallery

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

    Target Area <h3>Checking Target Vibration Response</h3>Cryogenic Systems Operator John Mourelatos performs a quality-control check of a NIF target's vibration response during closure of the cryogenic target positioner's protective shroud in preparation for a wetted-foam liquid deuterium-tritium experiment (see <a href="/news/science-technology/2016/may">"Solving the Challenges of Making Liquid-Hydrogen Targets"</a>). Credit: James Pryatel.

  6. Photo Gallery

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

    Targets <h3>Beryllium Capsule</h3>A copper-doped beryllium capsule in a hohlraum target used in a convergent ablator experiment for Los Alamos National Laboratory's inertial confinement fusion program. The shot's goal was to measure laser-plasma interactions, the implosion velocity of the capsule, and drive symmetry in a larger gold hohlraum with lower fill gas pressure compared to previous shots. A copper backlighter was used to radiograph the capsule during its implosion.

  7. ALS Staff Photo

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

    On May 14, 2013, members of ALS staff posed for a group photo in front of the dome. A hi-res version can be downloaded here. The last staff photo was taken in 2006. 2013 staff...

  8. NERSC Systems Photos

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

    Systems Photos NERSC Systems Photos cori panorama 1997x723 Cori (panorama) Cori closeup Cori (crop) Cori longshot Cori (wide shot) Edison Edison Edison headon Edison Last edited: 2016-04-29 11:34:48

  9. Photo-oxidation catalysts

    DOE Patents [OSTI]

    Pitts, J. Roland; Liu, Ping; Smith, R. Davis

    2009-07-14

    Photo-oxidation catalysts and methods for cleaning a metal-based catalyst are disclosed. An exemplary catalyst system implementing a photo-oxidation catalyst may comprise a metal-based catalyst, and a photo-oxidation catalyst for cleaning the metal-based catalyst in the presence of light. The exposure to light enables the photo-oxidation catalyst to substantially oxidize absorbed contaminants and reduce accumulation of the contaminants on the metal-based catalyst. Applications are also disclosed.

  10. Water Cooled Mirror Design

    SciTech Connect (OSTI)

    Dale, Gregory E.; Holloway, Michael Andrew; Pulliam, Elias Noel

    2015-03-30

    This design is intended to replace the current mirror setup being used for the NorthStar Moly 99 project in order to monitor the target coupon. The existing setup has limited movement for camera alignment and is difficult to align properly. This proposed conceptual design for a water cooled mirror will allow for greater thermal transfer between the mirror and the water block. It will also improve positioning of the mirror by using flexible vacuum hosing and a ball head joint capable of a wide range of motion. Incorporating this design into the target monitoring system will provide more efficient cooling of the mirror which will improve the amount of diffraction caused by the heating of the mirror. The process of aligning the mirror for accurate position will be greatly improved by increasing the range of motion by offering six degrees of freedom.

  11. Electrons and Mirror Symmetry

    SciTech Connect (OSTI)

    Kumar, Krishna

    2007-04-04

    The neutral weak force between an electron and a target particle, mediated by the Z boson, can be isolated by measuring the fractional change under a mirror reflection of the scattering probability of relativistic longitudinally polarized electrons off unpolarized targets. This technique yields neutral weak force measurements at a length scale of 1 femtometer, in contrast to high energy collider measurements that probe much smaller length scales. Study of the variation of the weak force over a range of length scales provides a stringent test of theory, complementing collider measurements. We describe a recent measurement of the neutral weak force between two electrons by the E158 experiment at the Stanford Linear Accelerator Center. While the weak force between an electron and positron has been extensively studied, that between two electrons had never directly been measured. We conclude by discussing prospects for even more precise measurements at future facilities.

  12. Electrons and Mirror Symmetry

    ScienceCinema (OSTI)

    Kumar, Krishna

    2009-09-01

    The neutral weak force between an electron and a target particle, mediated by the Z boson, can be isolated by measuring the fractional change under a mirror reflection of the scattering probability of relativistic longitudinally polarized electrons off unpolarized targets. This technique yields neutral weak force measurements at a length scale of 1 femtometer, in contrast to high energy collider measurements that probe much smaller length scales. Study of the variation of the weak force over a range of length scales provides a stringent test of theory, complementing collider measurements. We describe a recent measurement of the neutral weak force between two electrons by the E158 experiment at the Stanford Linear Accelerator Center. While the weak force between an electron and positron has been extensively studied, that between two electrons had never directly been measured. We conclude by discussing prospects for even more precise measurements at future facilities.

  13. Erected mirror optical switch

    DOE Patents [OSTI]

    Allen, James J.

    2005-06-07

    A microelectromechanical (MEM) optical switching apparatus is disclosed that is based on an erectable mirror which is formed on a rotatable stage using surface micromachining. An electrostatic actuator is also formed on the substrate to rotate the stage and mirror with a high angular precision. The mirror can be erected manually after fabrication of the device and used to redirect an incident light beam at an arbitrary angel and to maintain this state in the absence of any applied electrical power. A 1.times.N optical switch can be formed using a single rotatable mirror. In some embodiments of the present invention, a plurality of rotatable mirrors can be configured so that the stages and mirrors rotate in unison when driven by a single micromotor thereby forming a 2.times.2 optical switch which can be used to switch a pair of incident light beams, or as a building block to form a higher-order optical switch.

  14. Manhattan Project: Photo Gallery

    Office of Scientific and Technical Information (OSTI)

    Leslie Groves and J. Robert Oppenheimer PHOTO GALLERY Resources Additional information is available regarding the following "animated gifs" and other photographs: Alpha Racetrack, ...

  15. Stable mirror mount

    DOE Patents [OSTI]

    Cutburth, R.W.

    1983-11-04

    An improved mirror mount assembly is disclosed. The mirror mount assembly provides a post assembly slidable in a Y-axis orientation and a nut plate assembly slidable in an X-axis orientation and means for simultaneously locking said post assembly and said key assembly in a fixed position.

  16. Stable mirror mount

    DOE Patents [OSTI]

    Cutburth, Ronald W. (Bulls Gap, TN)

    1990-01-01

    An improved mirror mount assembly is disclosed. The mirror mount assembly provides a post assembly slidable in a Y-axis orientation and a nut plate assembly slidable in an X-axis orientation and a device for simultaneously locking the post assembly and the key assembly in a fixed position.

  17. Partially segmented deformable mirror

    DOE Patents [OSTI]

    Bliss, E.S.; Smith, J.R.; Salmon, J.T.; Monjes, J.A.

    1991-05-21

    A partially segmented deformable mirror is formed with a mirror plate having a smooth and continuous front surface and a plurality of actuators to its back surface. The back surface is divided into triangular areas which are mutually separated by grooves. The grooves are deep enough to make the plate deformable and the actuators for displacing the mirror plate in the direction normal to its surface are inserted in the grooves at the vertices of the triangular areas. Each actuator includes a transducer supported by a receptacle with outer shells having outer surfaces. The vertices have inner walls which are approximately perpendicular to the mirror surface and make planar contacts with the outer surfaces of the outer shells. The adhesive which is used on these contact surfaces tends to contract when it dries but the outer shells can bend and serve to minimize the tendency of the mirror to warp. 5 figures.

  18. Partially segmented deformable mirror

    DOE Patents [OSTI]

    Bliss, Erlan S.; Smith, James R.; Salmon, J. Thaddeus; Monjes, Julio A.

    1991-01-01

    A partially segmented deformable mirror is formed with a mirror plate having a smooth and continuous front surface and a plurality of actuators to its back surface. The back surface is divided into triangular areas which are mutually separated by grooves. The grooves are deep enough to make the plate deformable and the actuators for displacing the mirror plate in the direction normal to its surface are inserted in the grooves at the vertices of the triangular areas. Each actuator includes a transducer supported by a receptacle with outer shells having outer surfaces. The vertices have inner walls which are approximately perpendicular to the mirror surface and make planar contacts with the outer surfaces of the outer shells. The adhesive which is used on these contact surfaces tends to contract when it dries but the outer shells can bend and serve to minimize the tendency of the mirror to warp.

  19. Tandem mirror plasma confinement apparatus

    DOE Patents [OSTI]

    Fowler, T. Kenneth

    1978-11-14

    Apparatus and method for confining a plasma in a center mirror cell by use of two end mirror cells as positively charged end stoppers to minimize leakage of positive particles from the ends of the center mirror cell.

  20. Weather Photos - Hanford Site

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

    Hanford Meteorological Station Weather Photos Hanford Meteorological Station Photo Gallery Email Email Page | Print Print Page | Text Increase Font Size Decrease Font Size Hanford Meteorological Service Search Search Search Filter: Hanford Meteorological Service All Galleries 284 East Explosive Demolition Settlers B Reactor 100DX Groundwater Treatment Facility 100HX Groundwater Treatment Facility 200 West Groundwater Treatment Facility Construction 200 West Groundwater Treatment LEED Facility

  1. Universally oriented renewable liquid mirror

    DOE Patents [OSTI]

    Ryutov, Dmitri D.; Toor, Arthur

    2004-07-20

    A universally oriented liquid mirror. A liquid and a penetrable unit are operatively connected to provide a mirror that can be universally oriented.

  2. Mirror plasma apparatus

    DOE Patents [OSTI]

    Moir, Ralph W.

    1981-01-01

    A mirror plasma apparatus which utilizes shielding by arc discharge to form a blanket plasma and lithium walls to reduce neutron damage to the wall of the apparatus. An embodiment involves a rotating liquid lithium blanket for a tandem mirror plasma apparatus wherein the first wall of the central mirror cell is made of liquid lithium which is spun with angular velocity great enough to keep the liquid lithium against the first material wall, a blanket plasma preventing the lithium vapor from contaminating the plasma.

  3. Nanolaminate deformable mirrors

    DOE Patents [OSTI]

    Papavasiliou, Alexandros P.; Olivier, Scot S.

    2009-04-14

    A deformable mirror formed out of two layers of a nanolaminate foil attached to a stiff substrate is introduced. Deformation is provided by an electrostatic force between two of the layers. The internal stiffness of the structure allows for high-spatial-frequency shapes. The nanolaminate foil of the present invention allows for a high-quality mirror surface. The device achieves high precision in the vertical direction by using foils with accurately controlled thicknesses, but does not require high precision in the lateral dimensions, allowing such mirrors to be fabricated using crude lithography techniques. Such techniques allow structures up to about the meter scale to be fabricated.

  4. Nanolaminate deformable mirrors

    DOE Patents [OSTI]

    Papavasiliou, Alexandros P.; Olivier, Scot S.

    2010-04-06

    A deformable mirror formed out of two layers of a nanolaminate foil attached to a stiff substrate is introduced. Deformation is provided by an electrostatic force between two of the layers. The internal stiffness of the structure allows for high-spatial-frequency shapes. The nanolaminate foil of the present invention allows for a high-quality mirror surface. The device achieves high precision in the vertical direction by using foils with accurately controlled thicknesses, but does not require high precision in the lateral dimensions, allowing such mirrors to be fabricated using crude lithography techniques. Such techniques allow structures up to about the meter scale to be fabricated.

  5. Photos | Photosynthetic Antenna Research Center

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

    Photos Photos EFRC Graduate Student Postdoctoral Researcher Competition Missouri Botanical Gardens Tour | Events & Topics Hot Topics Summer Workshops All Hands 2015 Tyson Research...

  6. Fireplace photo | Department of Energy

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

    photo Fireplace photo Photo of a fireplace. Fireplace photo (105.67 KB) More Documents & Publications .Hearth, Patio & Barbecue Association's Comments on DOE's Regulatory Burden RFI Department of Energy Request for Information: Reducing Regulatory Burden (Reply Comments) Re: Regulatory Burden RFI

  7. Tandem mirror technology demonstration facility

    SciTech Connect (OSTI)

    Not Available

    1983-10-01

    This report describes a facility for generating engineering data on the nuclear technologies needed to build an engineering test reactor (ETR). The facility, based on a tandem mirror operating in the Kelley mode, could be used to produce a high neutron flux (1.4 MW/M/sup 2/) on an 8-m/sup 2/ test area for testing fusion blankets. Runs of more than 100 h, with an average availability of 30%, would produce a fluence of 5 mW/yr/m/sup 2/ and give the necessary experience for successful operation of an ETR.

  8. Transition Metal Switchable Mirror

    ScienceCinema (OSTI)

    None

    2013-05-29

    The switchable-mirrors technology was developed by Tom Richardson and Jonathan Slack of Berkeley Lab's Environmental Energy Technologies Division. By using transition metals rather than the rare earth metals used in the first metal-hydride switchable mirrors, Richardson and Slack were able to lower the cost and simplify the manufacturing process. Energy performance is improved as well, because the new windows can reflect or transmit both visible and infrared light. Besides windows for offices and homes, possible applications include automobile sunroofs, signs and displays, aircraft windows, and spacecraft. More information at: http://windows.lbl.gov/materials/chromogenics/default.htm

  9. Transition Metal Switchable Mirror

    ScienceCinema (OSTI)

    None

    2010-01-08

    The switchable-mirrors technology was developed by Tom Richardson and Jonathan Slack of Berkeley Lab's Environmental Energy Technologies Division. By using transition metals rather than the rare earth metals used in the first metal-hydride switchable mirrors, Richardson and Slack were able to lower the cost and simplify the manufacturing process. Energy performance is improved as well, because the new windows can reflect or transmit both visible and infrared light. Besides windows for offices and homes, possible applications include automobile sunroofs, signs and displays, aircraft windows, and spacecraft.

  10. Barstow heliostat mirror glass characterization

    SciTech Connect (OSTI)

    Lind, M.A.; Buckwalter, C.Q.

    1980-09-01

    The technical analysis performed on the special run of low iron float glass procured from the Ford Glass Division for the ten megawatt solar thermal/electric pilot power plant to be constructed at Barstow, California is discussed. The topics that are addressed include the optical properties and the relative durability of the glass. Two optical parameters, solar transmittance and optical flatness, were measured as referenced in the specification and found to be better than the stated tolerances. The average solar transmittance exceeded 0.890 transmittance units. The glass also exhibited optical angular flatness deviations less than +-1.0 mrad as required. Both qualitative and quantitative accelerated weathering tests were performed on the glass in order to compare its durability to other soda lime float glass and alternate composition glasses of interest to the solar community. In both the quantitative leaching experiments and the more qualitative room temperature and elevated temperature water vapor exposure experiments the heliostat glass exhibited the same characteristics as the other soda-lime silicate float glasses. As a final test for mirroring compatability, selected samples of the production run of the glass were sent to four different commercial manufacturers for mirror coating. None of the manufacturers reported any difficulty silvering the glass. Based on the tests performed, the glass meets or exceeds all optical specifications for the Barstow heliostat field.

  11. CASL Photo Book

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

    CASL Photo Book August 7, 2014 CASL-U-2014-0177-000 CASL-U-2014-0177-000 Predictive science-based simulation technology that harnesses world-class computational power to enhance clean energy production CASL-U-2014-0177-000 Cover photo: 3D visualizations allow a physical walk-through of the top 20% of high-powered rods in a pressurized water reactor core. Details revealed through such visualizations can provide insight into factors affecting core performance. CASL team members often review and

  12. Durable metallized polymer mirror

    DOE Patents [OSTI]

    Schissel, P.O.; Kennedy, C.E.; Jorgensen, G.J.; Shinton, Y.D.; Goggin, R.M.

    1994-11-01

    A metallized polymer mirror construction is disclosed having improved durability against delamination and tunneling, comprising: an outer layer of polymeric material; a metal oxide layer underlying the outer layer of polymeric material; a silver reflective layer underneath the metal oxide layer; and a layer of adhesive attaching the silver layer to a substrate. 6 figs.

  13. Durable metallized polymer mirror

    DOE Patents [OSTI]

    Schissel, Paul O.; Kennedy, Cheryl E.; Jorgensen, Gary J.; Shinton, Yvonne D.; Goggin, Rita M.

    1994-01-01

    A metallized polymer mirror construction having improved durability against delamination and tunneling, comprising: an outer layer of polymeric material; a metal oxide layer underlying the outer layer of polymeric material; a silver reflective layer underneath the metal oxide layer; and a layer of adhesive attaching the silver layer to a substrate.

  14. DOE - NNSA/NFO -- Photo Library

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

    Library NNSANFO Language Options U.S. DOENNSA - Nevada Field Office Photo Library Search Listed by categories below are publicly released photos in the Nevada Field Office photo ...

  15. Photo Gallery | National Nuclear Security Administration

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

    Our Jobs Working at NNSA Blog Home Library Photo Gallery Photo Gallery The latest photos from NNSA headquarters and across the nuclear security enterprise. Visit us on Flickr...

  16. Photos | Argonne National Laboratory

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

    Photos Browse By - Any - General Argonne Information -Awards -Honors Energy -Energy efficiency --Vehicles ---Alternative fuels ---Automotive engineering ---Biofuels ---Diesel ---Electric drive technology ---Fuel economy ---Fuel injection ---Heavy-duty vehicles ---Hybrid & electric vehicles ---Hydrogen & fuel cells ---Internal combustion ---Maglev systems ---Powertrain research ---Vehicle testing --Building design ---Construction ---Industrial heating & cooling ---Industrial lighting

  17. Photos | Argonne National Laboratory

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

    Photos Browse By - Any - General Argonne Information -Awards -Honors Energy -Energy efficiency --Vehicles ---Alternative fuels ---Automotive engineering ---Biofuels ---Diesel ---Electric drive technology ---Fuel economy ---Fuel injection ---Heavy-duty vehicles ---Hybrid & electric vehicles ---Hydrogen & fuel cells ---Internal combustion ---Maglev systems ---Powertrain research ---Vehicle testing --Building design ---Construction ---Industrial heating & cooling ---Industrial lighting

  18. Photos | Argonne National Laboratory

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

    Photos Browse By - Any - General Argonne Information -Awards -Honors Energy -Energy efficiency --Vehicles ---Alternative fuels ---Automotive engineering ---Biofuels ---Diesel ---Electric drive technology ---Fuel economy ---Fuel injection ---Heavy-duty vehicles ---Hybrid & electric vehicles ---Hydrogen & fuel cells ---Internal combustion ---Maglev systems ---Powertrain research ---Vehicle testing --Building design ---Construction ---Industrial heating & cooling ---Industrial lighting

  19. Photos | Argonne National Laboratory

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

    Photos Browse By - Any - General Argonne Information -Awards -Honors Energy -Energy efficiency --Vehicles ---Alternative fuels ---Automotive engineering ---Biofuels ---Diesel ---Electric drive technology ---Fuel economy ---Fuel injection ---Heavy-duty vehicles ---Hybrid & electric vehicles ---Hydrogen & fuel cells ---Internal combustion ---Maglev systems ---Powertrain research ---Vehicle testing --Building design ---Construction ---Industrial heating & cooling ---Industrial lighting

  20. Photos on This Web Site

    Office of Energy Efficiency and Renewable Energy (EERE)

    Most of the geothermal energy photos used on this web site can be obtained from the National Renewable Energy Laboratory's Photographic Information eXchange (PIX). Before using a photo, please read...

  1. LCLS X-ray mirror measurements using a large aperture visible light

    Office of Scientific and Technical Information (OSTI)

    interferometer (Conference) | SciTech Connect Conference: LCLS X-ray mirror measurements using a large aperture visible light interferometer Citation Details In-Document Search Title: LCLS X-ray mirror measurements using a large aperture visible light interferometer Synchrotron or FEL X-ray mirrors are required to deliver an X-ray beam from its source to an experiment location, without contributing significantly to wave front distortion. Accurate mirror figure measurements are required prior

  2. Complex/Symplectic Mirrors

    SciTech Connect (OSTI)

    Chuang, Wu-yen; Kachru, Shamit; Tomasiello, Alessandro; /Stanford U., ITP

    2005-10-28

    We construct a class of symplectic non-Kaehler and complex non-Kaehler string theory vacua, extending and providing evidence for an earlier suggestion by Polchinski and Strominger. The class admits a mirror pairing by construction. Comparing hints from a variety of sources, including ten-dimensional supergravity and KK reduction on SU(3)-structure manifolds, suggests a picture in which string theory extends Reid's fantasy to connect classes of both complex non-Kaehler and symplectic non-Kaehler manifolds.

  3. BN-350 "Mirror System".

    SciTech Connect (OSTI)

    Thornton, A. L.; Halbig, J. K.

    2004-01-01

    The BN-350 Unattended Monitoring System plays an important role for the Safeguards Department of the International Atomic Energy Agency (IAEA). In 1998, the Los Alamos National Laboratory, in conjunction with the IAEA and sponsored by the US Department of Energy, designed and installed an integrated multi-instrument safeguards system at the BN-350 reactor in Aktau, Kazakhstan, to monitor spent-fuel and blanket assembly conditioning and canning activities. The purpose of the system was to provide effective safeguards at this facility while reducing the manpower load on the IAEA. The system is composed of many individual nondestructive analysis and surveillance components, each having a unique function and working together to provide fully unattended measurement of spent-fuel assemblies. The BN-350 ''Mirror System'' was built to provide a similar system with like components at the IAEA Headquarters in Vienna to facilitate analysis and/or simulation of problems that might occur in the field and for training inspectors and other technical staff in preparation for their work in the field. In addition, the system is used to test new equipment and qualify new or modified software. This paper describes the main components of the Mirror System, how the components are integrated, and how the Mirror System has benefited the IAEA.

  4. DOE - NNSA/NFO -- Photo Library BEEF

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

    BEEF NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - Big Explosives Experimental Facility (BEEF) The Big Explosives Experimental Facility (BEEF) is a hydrodynamic testing facility, located at the Nevada National Security Site. BEEF provides data, through explosive experiments, to support the Stockpile Stewardship Program, along with a variety of new experimental programs that expand the nation's non-nuclear experiment capabilities. Instructions: Click the photograph

  5. Photos and graphics

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

    Photos and graphics MINERVA_assembly_10-0082-08D MINERvA uses a collider detector design and a high-intensity beam to study neutrino reactions with five different nuclei, creating the first self-contained comparison of interactions in different elements. MINERvA's comprehensive research goals attract scientists from around the globe who specialize in nuclear and particle physics. (Credit: Fermilab) MINERvA's comprehensive research goals attract scientists from around the globe who specialize in

  6. PAGE Cover: Top Photo

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

    PAGE Cover: Top Photo Energy Sciences Building. Elevation of the recently completed Energy Sciences Building (ESB) project at Argonne National Laboratory in Lemont, Illinois. The ESB was a capital line-item project funded by the Science Laboratories Infrastructure program at a total cost of $96 million and was completed on August 6, 2014. The ESB project provided 173,000 gross square feet of interdisciplinary research and collaborative space to accommodate a range of physical sciences research

  7. Low Cost, Stable Switchable Mirrors: Lithium Ion Mirrors with Improved

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

    Stability - Energy Innovation Portal Low Cost, Stable Switchable Mirrors: Lithium Ion Mirrors with Improved Stability Lawrence Berkeley National Laboratory Contact LBL About This Technology Technology Marketing SummarySwitchable mirrors are a new generation of electrochromic windows that can alternate between a reflecting state and a transparent or absorbing state when a small voltage is applied. These energy saving devices have advantages over traditional absorbing electrochromics for

  8. Technology of mirror machines: LLL facilities for magnetic mirror...

    Office of Scientific and Technical Information (OSTI)

    The second facility, MFTF (Mirror Fusion Test Facility), is currently in preliminary design with line item approval anticipated for FY 78. MFTF is designed primarily to exploit the ...

  9. Variable focal length deformable mirror

    SciTech Connect (OSTI)

    Headley, Daniel; Ramsey, Marc; Schwarz, Jens

    2007-06-12

    A variable focal length deformable mirror has an inner ring and an outer ring that simply support and push axially on opposite sides of a mirror plate. The resulting variable clamping force deforms the mirror plate to provide a parabolic mirror shape. The rings are parallel planar sections of a single paraboloid and can provide an on-axis focus, if the rings are circular, or an off-axis focus, if the rings are elliptical. The focal length of the deformable mirror can be varied by changing the variable clamping force. The deformable mirror can generally be used in any application requiring the focusing or defocusing of light, including with both coherent and incoherent light sources.

  10. Concentrating Solar Power Mirror Coating

    Broader source: Energy.gov [DOE]

    This photograph features Cheryl Kennedy, a senior scientist at the National Renewable Energy Laboratory. She holds a sample of an experimental mirror coating to increase the efficiency of...

  11. PHOTO BY JAMES CHRZANOWSKI

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

    PHOTO BY JAMES CHRZANOWSKI After a three-year, $94 million overhaul, the Princeton Plasma Physics Laboratory's primary fusion reactor has resumed the quest for clean energy. The fusion of parts of the atom inside the reactor could release a near limitless amount of energy and reduce our dependence on fossil fuels, while generating minimal hazardous waste. The upgrade included replacing the center of the apple-shaped reactor with a new 29,000-pound magnetic core (left) and bringing in a 70-ton

  12. WIPP - Photo Gallery

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

    Gallery Shortcuts WIPP Site Transportation Contact-Handled TRU Waste Remote-Handled TRU Waste Mining Photo Gallery Click on a thumbnail image to see a larger version of the photographs. WIPP Site Back to top The entrance to the Waste Isolation Pilot Plant near Carlsbad, N.M. The entrance to the Waste Isolation Pilot Plant near Carlsbad, N.M. The Waste Isolation Pilot Plant at sunrise. The Waste Isolation Pilot Plant at sunrise. A view of the Waste Isolation Pilot Plant from a distance. A view of

  13. Index of /nnpss/photos

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

    nnpss/photos [ICO] Name Last modified Size Description [DIR] Parent Directory - [DIR] DurhamBullsGame/ 07-Jul-2011 17:46 - [DIR] Farewell/ 07-Jul-2011 17:48 - [IMG] GroupPhoto_HIGH_RESOLUTION.jpg 07-Jul-2011 14:44 4.8M [IMG] GroupPhoto_LOW_RESOLUTION.jpg 07-Jul-2011 14:44 428K [IMG] GroupPhoto_MEDIUM_RESOLUTION.jpg 07-Jul-2011 14:44 5.0M [DIR] Lectures/ 07-Jul-2011 17:58 - [DIR] PosterSession/ 07-Jul-2011 17:50 - [DIR] WelcomeReception/ 07-Jul-2011 17:47 -

  14. Elongational viscosity of photo-oxidated LDPE

    SciTech Connect (OSTI)

    Roln-Garrido, Vctor H. E-mail: manfred.wagner@tu-berlin.de; Wagner, Manfred H. E-mail: manfred.wagner@tu-berlin.de

    2014-05-15

    Sheets of low-density polyethylene (LDPE) were photo-oxidatively treated at room temperature, and subsequently characterized rheologically in the melt state by shear and uniaxial extensional experiments. For photo-oxidation, a xenon lamp was used to irradiate the samples for times between 1 day and 6 weeks. Linear-viscoelastic characterization was performed in a temperature range of 130 to 220C to obtain the master curve at 170C, the reference temperature at which the elongational viscosities were measured. Linear viscoelasticity is increasingly affected by increasing photo-oxidation due to crosslinking of LDPE, as corroborated by an increasing gel fraction as determined by a solvent extraction method. The elongational measurements reveal a strong enhancement of strain hardening until a saturation level is achieved. The elongational data are analyzed in the frame work of two constitutive equations, the rubber-like liquid and the molecular stress function models. Within the experimental window, timedeformation separability is confirmed for all samples, independent of the degree of photo-oxidation.

  15. Mirror profile optimization for nano-focusing KB mirror

    SciTech Connect (OSTI)

    Zhang Lin; Baker, Robert; Barrett, Ray; Cloetens, Peter; Dabin, Yves

    2010-06-23

    A KB focusing mirror width profile has been optimized to achieve nano-focusing for the nano-imaging end-station ID22NI at the ESRF. The complete mirror and flexure bender assembly has been modeled in 3D with finite element analysis using ANSYS. Bender stiffness, anticlastic effects and geometrical non-linear effects have been considered. Various points have been studied: anisotropy and crystal orientation, stress in the mirror and bender, actuator resolution and the mirror-bender adhesive bonding... Extremely high performance of the mirror is expected with residual slope error smaller than 0.6 {mu}rad, peak-to-valley, compared to the bent slope of 3000 {mu}rad.

  16. Some fundamentals of cooled mirrors for synchrotron radiation beam lines

    SciTech Connect (OSTI)

    Howells, M.R.

    1996-04-01

    We present an analysis using conventional heat-transfer theory of a common type of synchrotron-radiation-beam-line mirror with rectangular cooling channels. The analysis leads to a simple analytic expression for the slope error, which enables the distortion performance to be estimated in practical situations. It also provides an understanding of the effect of the various parameters on the goodness of the cooling process and an insight into the underlying physics. The analysis is applied to determining the design steps needed to achieve low slope errors and/or high-heat-removal rates with this type of mirror. The slope-error performance of various materials in a specific design are compared and the best performance is obtained from (in order) invar, silicon, and silicon carbide. {copyright} {ital 1996 Society of Photo{minus}Optical Instrumentation Engineers.}

  17. DOE - NNSA/NFO -- Photo Library ATLAS

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

    ATLAS NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - ATLAS Pulsed-Power Generator The ATLAS pulsed-power generator is one of many alternatives to underground nuclear testing. Pulsed power can concentrate high total energies on larger (centimeter-scale) experimental targets for relatively long periods of times compared to other Stockpile Stewardship experiments. Instructions: Click the photograph THUMBNAIL to view the photograph details Click the Category, Number,

  18. Photo Galleries | Department of Energy

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

    News & Blog » Photo Galleries Photo Galleries Gallery Title Topic - Any - Tax Credits, Rebates, Savings Energy Efficiency -Homes --Heating & Cooling ---Heating ---Cooling ---Heat Pumps --Water Heating ---Swimming Pool Heaters --Home Weatherization ---Home Energy Audits ---Insulation ---Sealing Your Home ---Ventilation --Saving Electricity ---Lighting ---Appliances & Electronics ---Buying & Making Electricity --Design & Remodeling ---Windows, Doors, & Skylights

  19. Photo Gallery: Energy Literacy in 2013 | Department of Energy

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

    Photo Gallery: Energy Literacy in 2013 Photo Gallery: Energy Literacy in 2013 December 18, 2013 - 10:27am Addthis In celebration of Earth Day in April, elementary school students at Churchill Road Elementary School in McLean, Virginia, learned about energy literacy by riding the Energy Department’s energy bike. The bike enabled students to pedal for power and experience the difference in physical effort necessary to power incandescent, compact fluorescent, and LED lighting. This lesson

  20. Photo: US ITER/ORNL INSIDE: ITER Site Progress

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

    Photo Gallery: Energy Literacy in 2013 Photo Gallery: Energy Literacy in 2013 December 18, 2013 - 10:27am Addthis In celebration of Earth Day in April, elementary school students at Churchill Road Elementary School in McLean, Virginia, learned about energy literacy by riding the Energy Department’s energy bike. The bike enabled students to pedal for power and experience the difference in physical effort necessary to power incandescent, compact fluorescent, and LED lighting. This lesson

  1. Photo Gallery | Mickey Leland Energy Fellowship (MLEF)

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

    Photo Gallery In the gallery below you will find photos from the 2015 Mickey Leland Energy Fellowship (MLEF) Program. You can view our photos on Flickr. MLEF Technical Forum 2014...

  2. Fueling of tandem mirror reactors

    SciTech Connect (OSTI)

    Gorker, G.E.; Logan, B.G.

    1985-01-01

    This paper summarizes the fueling requirements for experimental and demonstration tandem mirror reactors (TMRs), reviews the status of conventional pellet injectors, and identifies some candidate accelerators that may be needed for fueling tandem mirror reactors. Characteristics and limitations of three types of accelerators are described; neutral beam injectors, electromagnetic rail guns, and laser beam drivers. Based on these characteristics and limitations, a computer module was developed for the Tandem Mirror Reactor Systems Code (TMRSC) to select the pellet injector/accelerator combination which most nearly satisfies the fueling requirements for a given machine design.

  3. CFC Photo Gallery | Department of Energy

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

    CFC Photo Gallery CFC Photo Gallery Addthis 1 of 5 2 of 5 3 of 5 4 of 5 5 of 5 View All Galleries...

  4. Schlumberger Office Photos | Open Energy Information

    Open Energy Info (EERE)

    Office Photos Jump to: navigation, search OpenEI Reference LibraryAdd to library Web Site: Schlumberger Office Photos Author Schlumberger Published Publisher Not Provided, 2013 DOI...

  5. High temperature current mirror amplifier

    DOE Patents [OSTI]

    Patterson, III, Raymond B.

    1984-05-22

    A high temperature current mirror amplifier having biasing means in the transdiode connection of the input transistor for producing a voltage to maintain the base-collector junction reversed-biased and a current means for maintaining a current through the biasing means at high temperatures so that the base-collector junction of the input transistor remained reversed-biased. For accuracy, a second current mirror is provided with a biasing means and current means on the input leg.

  6. High stroke pixel for a deformable mirror

    DOE Patents [OSTI]

    Miles, Robin R.; Papavasiliou, Alexandros P.

    2005-09-20

    A mirror pixel that can be fabricated using standard MEMS methods for a deformable mirror. The pixel is electrostatically actuated and is capable of the high deflections needed for spaced-based mirror applications. In one embodiment, the mirror comprises three layers, a top or mirror layer, a middle layer which consists of flexures, and a comb drive layer, with the flexures of the middle layer attached to the mirror layer and to the comb drive layer. The comb drives are attached to a frame via spring flexures. A number of these mirror pixels can be used to construct a large mirror assembly. The actuator for the mirror pixel may be configured as a crenellated beam with one end fixedly secured, or configured as a scissor jack. The mirror pixels may be used in various applications requiring high stroke adaptive optics.

  7. Geothermal Energy Photos | Department of Energy

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

    Energy Photos Geothermal Energy Photos Image of the Week: Energy Department investments are exploring for geothermal power from abundant natural resources in Alaska. photo courtesy of Frontier Scientists. Image of the Week: Energy Department investments are exploring for geothermal power from abundant natural resources in Alaska. photo courtesy of Frontier Scientists. Here you'll find links to online resources for photos of geothermal energy technologies, applications, projects, resources, and

  8. Acoustic enhancement for photo detecting devices

    SciTech Connect (OSTI)

    Thundat, Thomas G; Senesac, Lawrence R; Van Neste, Charles W

    2013-02-19

    Provided are improvements to photo detecting devices and methods for enhancing the sensitivity of photo detecting devices. A photo detecting device generates an electronic signal in response to a received light pulse. An electro-mechanical acoustic resonator, electrically coupled to the photo detecting device, damps the electronic signal and increases the signal noise ratio (SNR) of the electronic signal. Increased photo detector standoff distances and sensitivities will result.

  9. Compact neutron imaging system using axisymmetric mirrors

    DOE Patents [OSTI]

    Khaykovich, Boris; Moncton, David E; Gubarev, Mikhail V; Ramsey, Brian D; Engelhaupt, Darell E

    2014-05-27

    A dispersed release of neutrons is generated from a source. A portion of this dispersed neutron release is reflected by surfaces of a plurality of nested, axisymmetric mirrors in at least an inner mirror layer and an outer mirror layer, wherein the neutrons reflected by the inner mirror layer are incident on at least one mirror surface of the inner mirror layer N times, wherein N is an integer, and wherein neutrons reflected by the outer mirror are incident on a plurality of mirror surfaces of the outer layer N+i times, where i is a positive integer, to redirect the neutrons toward a target. The mirrors can be formed by a periodically reversed pulsed-plating process.

  10. Compaction managed mirror bend achromat

    DOE Patents [OSTI]

    Douglas, David

    2005-10-18

    A method for controlling the momentum compaction in a beam of charged particles. The method includes a compaction-managed mirror bend achromat (CMMBA) that provides a beamline design that retains the large momentum acceptance of a conventional mirror bend achromat. The CMMBA also provides the ability to tailor the system momentum compaction spectrum as desired for specific applications. The CMMBA enables magnetostatic management of the longitudinal phase space in Energy Recovery Linacs (ERLs) thereby alleviating the need for harmonic linearization of the RF waveform.

  11. High temperature current mirror amplifier

    DOE Patents [OSTI]

    Patterson, R.B. III.

    1984-05-22

    Disclosed is a high temperature current mirror amplifier having biasing means in the transdiode connection of the input transistor for producing a voltage to maintain the base-collector junction reversed-biased and a current means for maintaining a current through the biasing means at high temperatures so that the base-collector junction of the input transistor remained reversed-biased. For accuracy, a second current mirror is provided with a biasing means and current means on the input leg. 2 figs.

  12. Electron cyclotron resonance plasma photos

    SciTech Connect (OSTI)

    Racz, R.; Palinkas, J.; Biri, S.

    2010-02-15

    In order to observe and study systematically the plasma of electron cyclotron resonance (ECR) ion sources (ECRIS) we made a high number of high-resolution visible light plasma photos and movies in the ATOMKI ECRIS Laboratory. This required building the ECR ion source into an open ECR plasma device, temporarily. An 8MP digital camera was used to record photos of plasmas made from Ne, Ar, and Kr gases and from their mixtures. We studied and recorded the effect of ion source setting parameters (gas pressure, gas composition, magnetic field, and microwave power) to the shape, color, and structure of the plasma. The analysis of the photo series gave us many qualitative and numerous valuable physical information on the nature of ECR plasmas.

  13. Photo-thermal quartz tuning fork excitation for dynamic mode atomic force microscope

    SciTech Connect (OSTI)

    Bontempi, Alexia; Teyssieux, Damien; Thiery, Laurent; Hermelin, Damien; Vairac, Pascal; Friedt, Jean-Michel

    2014-10-13

    A photo-thermal excitation of a Quartz Tuning Fork (QTF) for topographic studies is introduced. The non-invasive photo-thermal excitation presents practical advantages compared to QTF mechanical and electrical excitations, including the absence of the anti-resonance and its associated phase rotation. Comparison between our theoretical model and experiments validate that the optical transduction mechanism is a photo-thermal rather than photo-thermoacoustic phenomenon. Topographic maps in the context of near-field microscopy distance control have been achieved to demonstrate the performance of the system.

  14. Jefferson Lab Photos | Jefferson Lab

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

    Jefferson Lab Photos Images on the Jefferson Lab website that are in the public domain may be used without permission. If you use images from the Jefferson Lab website, it is requested that you credit Jefferson Lab as the source, unless an image is used in an advertisement. As a courtesy, you can also inform Jefferson Lab of your intended use of a photo by sending an e-mail to jlabinfo@jlab.org. Please note that some images on the website may have been obtained from other organizations and will

  15. Design of magnetic mirrors for a linear theta pinch

    SciTech Connect (OSTI)

    Veglia, V. P.

    1981-01-01

    The problem of generating optimum magnetic mirror fields at the ends of a 50-cm long theta-pinch experiment to study particle flow and loss effects has been investigated. A combination of active and passive mirrors was developed to produce 2-3:1 fields for a 23-kG pinch. Biot-Savart and potential field prediction solutions for the magnetic field distribution were compared with experimental measurements in 2-5-cm long coils for the 50-cm long pinch.

  16. Mirror with thermally controlled radius of curvature

    DOE Patents [OSTI]

    Neil, George R.; Shinn, Michelle D.

    2010-06-22

    A radius of curvature controlled mirror for controlling precisely the focal point of a laser beam or other light beam. The radius of curvature controlled mirror provides nearly spherical distortion of the mirror in response to differential expansion between the front and rear surfaces of the mirror. The radius of curvature controlled mirror compensates for changes in other optical components due to heating or other physical changes. The radius of curvature controlled mirror includes an arrangement for adjusting the temperature of the front surface and separately adjusting the temperature of the rear surface to control the radius of curvature. The temperature adjustment arrangements can include cooling channels within the mirror body or convection of a gas upon the surface of the mirror. A control system controls the differential expansion between the front and rear surfaces to achieve the desired radius of curvature.

  17. Restoration Monitoring-A Simple Photo Monitoring Method | Department...

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

    Restoration Monitoring-A Simple Photo Monitoring Method Restoration Monitoring-A Simple Photo Monitoring Method Restoration Monitoring-A Simple Photo Monitoring Method PDF icon ...

  18. DOE - NNSA/NFO -- Photo Library General

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

    General NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - General Photos related to the Nevada Field Office which do not fall under the other photo categories are located here. Instructions: Click the photograph THUMBNAIL to view the photograph details Click the Category, Number, or Date table header links to sort the information. Thumbnail Category Number Date http://www.nv.doe.gov/library/photos/thumbs/nf1648.jpg General

  19. Radius of curvature controlled mirror

    DOE Patents [OSTI]

    Neil, George R.; Rathke, John Wickham; Schultheiss, Thomas John; Shinn, Michelle D.; Dillon-Townes, Lawrence A.

    2006-01-17

    A controlled radius of curvature mirror assembly comprising: a distortable mirror having a reflective surface and a rear surface; and in descending order from the rear surface; a counter-distortion plate; a flow diverter having a flow diverter aperture at the center thereof; a flow return plate having a flow return aperture at the center thereof; a thermal isolation plate having a thermal isolation plate aperture at the center thereof and a flexible heater having a rear surface and a flexible heater aperture at the center thereof; a double walled tube defining a coolant feed chamber and a coolant return chamber; said coolant feed chamber extending to and through the flow diverter aperture and terminating at the counter-distortion plate and the coolant return chamber extending to and through the thermal isolation backplate and terminating at the flow diverter; and a coolant feed and a coolant return exit at the rear of said flexible heater.

  20. Symmetry tests in photo-pion production

    SciTech Connect (OSTI)

    Bernstein, A. M.

    2013-11-07

    Small angle electron scattering with intense electron beams opens up the possibility of performing almost real photon induced reactions with thin, polarized hydrogen and few body targets, allowing for the detection of low energy charged particles. This promises to be much more effective than conventional photon tagging techniques. For photo-pion reactions some fundamental new possibilities include: tests of charge symmetry in the N-N system by measurement of the neutron-neutron scattering length a{sub nn} in the and ggrD ? ?{sup +}nn reaction; tests of isospin breaking due to the mass difference of the up and down quarks; measurements with polarized targets are sensitive to ?N phase shifts and will test the validity of the Fermi-Watson (final state interaction) theorem. All of these experiments will test the accuracy and energy region of validity of chiral effective theories.

  1. Passivation coating for flexible substrate mirrors

    DOE Patents [OSTI]

    Tracy, C. Edwin; Benson, David K.

    1990-01-01

    A protective diffusion barrier for metalized mirror structures is provided by a layer or coating of silicon nitride which is a very dense, transparent, dielectric material that is impervious to water, alkali, and other impurities and corrosive substances that typically attack the metal layers of mirrors and cause degradation of the mirrors' reflectivity. The silicon nitride layer can be deposited on the substrate before metal deposition thereon to stabilize the metal/substrate interface, and it can be deposited over the metal to encapsulate it and protect the metal from corrosion or other degradation. Mirrors coated with silicon nitride according to this invention can also be used as front surface mirrors. Also, the silver or other reflective metal layer on mirrors comprising thin, lightweight, flexible substrates of metal or polymer sheets coated with glassy layers can be protected with silicon nitride according to this invention.

  2. Process for preparing improved silvered glass mirrors

    DOE Patents [OSTI]

    Buckwalter, C.Q. Jr.

    1980-01-28

    Glass mirrors having improved weathering properties are prepared by an improvement in the process for making the mirrors. The glass surface after it has been cleaned but before it is silvered, is contacted with a solution of lanthanide rare earths in addition to a sensitization solution of tin or palladium. The addition of the rare earths produces a mirror which has increased resistance to delamination of the silver from the glass surface in the presence of water.

  3. Deformable mirror for short wavelength applications

    DOE Patents [OSTI]

    Chapman, Henry N.; Sweeney, Donald W.

    1999-01-01

    A deformable mirror compatible with short wavelength (extreme ultraviolet) radiation that can be precisely controlled to nanometer and subnanometer accuracy is described. Actuators are coupled between a reaction plate and a face plate which has a reflective coating. A control system adjusts the voltage supplied to the actuators; by coordinating the voltages supplied to the actuators, the reflective surface of the mirror can be deformed to correct for dimensional errors in the mirror or to produce a desired contour.

  4. Process for preparing improved silvered glass mirrors

    DOE Patents [OSTI]

    Buckwalter, Jr., Charles Q. (Benton, WA)

    1981-01-01

    Glass mirrors having improved weathering properties are prepared by an improvement in the process for making the mirrors. The glass surface after it has been cleaned but before it is silvered, is contacted with a solution of lanthanide rare earths in addition to a sensitization solution of tin or palladium. The addition of the rare earths produces a mirror which has increased resistance to delamination of the silver from the glass surface in the presence of water.

  5. Astrophysical tests of mirror dark matter

    SciTech Connect (OSTI)

    Ciarcelluti, P.

    2008-08-29

    Mirror matter is a self-collisional dark matter candidate. If exact mirror parity is a conserved symmetry of the nature, there could exist a parallel hidden (mirror) sector of the Universe which has the same kind of particles and the same physical laws of our (visible) sector. The two sectors interact each other only via gravity, therefore mirror matter is naturally 'dark'. The most promising way to test this dark matter candidate is to look at its astrophysical signatures, as Big Bang nucleosynthesis, primordial structure formation and evolution, cosmic microwave background and large scale structure power spectra.

  6. AXISYMMETRIC MAGNETIC MIRROR APPLICATIONS - DIVERTER TEST STAND...

    Office of Scientific and Technical Information (OSTI)

    APPLICATIONS - DIVERTER TEST STAND TO FUSION POWER PLANT Citation Details In-Document Search Title: AXISYMMETRIC MAGNETIC MIRROR APPLICATIONS - DIVERTER TEST STAND TO FUSION POWER ...

  7. photo | netl.doe.gov

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

    Video, Images, and Photos What is Gasification? (Oct 2014) Gasification-the process of converting carbon-based materials such as coal into syngas, which can then be used to produce electricity, chemicals, and other products-is a promising pathway to reduce our nation's dependence on foreign oil and provide a clean, carbon capture-ready source of energy. Watch the video to find out more. From Lab to Market-Improving Gasification Economics for Power and Chemicals Production (July 2014) [view] In

  8. Photo-switchable membrane and method

    DOE Patents [OSTI]

    Marshall, Kenneth L; Glowacki, Eric

    2013-05-07

    Switchable gas permeation membranes in which a photo-switchable low-molecular-weight liquid crystalline (LC) material acts as the active element, and a method of making such membranes. Different LC eutectic mixtures were doped with mesogenic azo dyes and infused into track-etched porous membranes with regular cylindrical pores. Photo-induced isothermal phase changes in the imbibed mesogenic material afforded large, reversible changes in the permeability of the photo-switchable membrane to nitrogen. For example, membranes imbibed with a photo-switchable cyanobiphenyl LC material demonstrated low permeability in the nematic state, while the photo-generated isotropic state demonstrated a 16.times.-greater sorption coefficient. Both states obey a high linear sorption behavior in accordance with Henry's Law. In contrast, membranes imbibed with a photo-switchable phenyl benzoate LC material showed the opposite permeability behavior to the biphenyl-imbibed membrane, along with nonlinear sorption behavior.

  9. Multimedia and Photos | Department of Energy

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

    Multimedia and Photos Multimedia and Photos Geothermal technologies dig deep in the earth, an average of two to five kilometers, to access the heat resource naturally found in the subsurface. Geothermal technologies dig deep in the earth, an average of two to five kilometers, to access the heat resource naturally found in the subsurface. Communications resources from the Geothermal Technologies Office at the Energy Department include a new photo library, below, and a video link for images and

  10. Plasma confinement apparatus using solenoidal and mirror coils

    DOE Patents [OSTI]

    Fowler, T. Kenneth; Condit, William C.

    1979-01-01

    A plasma confinement apparatus, wherein multiple magnetic mirror cells are linked by magnetic field lines inside of a solenoid with the mirroring regions for adjacent magnetic mirror cells each formed by a separate mirror coil inside of the solenoid. The magnetic mirror cells may be field reversed.

  11. DOE - NNSA/NFO -- Photo Library TUMBLER-SNAPPER

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

    Tumbler - Snapper NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - Tumbler-Snapper Operation Tumbler-Snapper consisted of eight nuclear shots in two phases. The Tumbler phase was of primary concern to the Department of Defense, which called for airdropped nuclear weapons tests. The Snapper second phase was a set of experiments conducted by the Atomic Energy Commission and the Los Alamos Scientific Laboratory to help improve effects of nuclear weapons. [ Full Text ]

  12. Three-point spherical mirror mount

    DOE Patents [OSTI]

    Cutburth, R.W.

    1984-01-23

    A three-point spherical mirror mount for use with lasers is disclosed. The improved mirror mount is adapted to provide a pivot ring having an outer surface with at least three spaced apart mating points to engage an inner spherical surface of a support housing.

  13. LED structure with enhanced mirror reflectivity

    DOE Patents [OSTI]

    Bergmann, Michael; Donofrio, Matthew; Heikman, Sten; Schneider, Kevin S; Haberern, Kevin W; Edmond, John A

    2014-04-01

    Embodiments of the present invention are generally related to LED chips having improved overall emission by reducing the light-absorbing effects of barrier layers adjacent mirror contacts. In one embodiment, a LED chip comprises one or more LEDs, with each LED having an active region, a first contact under the active region having a highly reflective mirror, and a barrier layer adjacent the mirror. The barrier layer is smaller than the mirror such that it does not extend beyond the periphery of the mirror. In another possible embodiment, an insulator is further provided, with the insulator adjacent the barrier layer and adjacent portions of the mirror not contacted by the active region or by the barrier layer. In yet another embodiment, a second contact is provided on the active region. In a further embodiment, the barrier layer is smaller than the mirror such that the periphery of the mirror is at least 40% free of the barrier layer, and the second contact is below the first contact and accessible from the bottom of the chip.

  14. Durable silver coating for mirrors

    DOE Patents [OSTI]

    Wolfe, Jesse D.; Thomas, Norman L.

    2000-01-01

    A durable multilayer mirror includes reflective layers of aluminum and silver and has high reflectance over a broad spectral range from ultraviolet to visible to infrared. An adhesion layer of a nickel and/or chromium alloy or nitride is deposited on an aluminum surface, and a thin layer of silver is then deposited on the adhesion layer. The silver layer is protected by a passivation layer of a nickel and/or chromium alloy or nitride and by one or more durability layers made of metal oxides and typically a first layer of metal nitride. The durability layers may include a composite silicon aluminum nitride and an oxinitride transition layer to improve bonding between nitride and oxide layers.

  15. Photo Galleries | Argonne Leadership Computing Facility

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

    Phonebook Phonebook Search the Energy Department Phonebook Enter your search request * Search Mission Leadership Organization Chart Staff and Contractors News & Blog

    News & Events Web Articles In the News Upcoming Events Past Events Informational Materials Photo Galleries Photo Galleries Mira installing Mira

  16. High voltage photo switch package module

    DOE Patents [OSTI]

    Sullivan, James S; Sanders, David M; Hawkins, Steven A; Sampayan, Stephen E

    2014-02-18

    A photo-conductive switch package module having a photo-conductive substrate or wafer with opposing electrode-interface surfaces, and at least one light-input surface. First metallic layers are formed on the electrode-interface surfaces, and one or more optical waveguides having input and output ends are bonded to the substrate so that the output end of each waveguide is bonded to a corresponding one of the light-input surfaces of the photo-conductive substrate. This forms a waveguide-substrate interface for coupling light into the photo-conductive wafer. A dielectric material such as epoxy is then used to encapsulate the photo-conductive substrate and optical waveguide so that only the metallic layers and the input end of the optical waveguide are exposed. Second metallic layers are then formed on the first metallic layers so that the waveguide-substrate interface is positioned under the second metallic layers.

  17. Axisymmetric Magnetic Mirror Fusion-Fission Hybrid (Technical...

    Office of Scientific and Technical Information (OSTI)

    Technical Report: Axisymmetric Magnetic Mirror Fusion-Fission Hybrid Citation Details In-Document Search Title: Axisymmetric Magnetic Mirror Fusion-Fission Hybrid Authors: Moir, R ...

  18. Intermodulation electrostatic force microscopy for imaging surface photo-voltage

    SciTech Connect (OSTI)

    Borgani, Riccardo Forchheimer, Daniel; Thorn, Per-Anders; Haviland, David B.; Bergqvist, Jonas; Ingans, Olle

    2014-10-06

    We demonstrate an alternative to Kelvin Probe Force Microscopy for imaging surface potential. The open-loop, single-pass technique applies a low-frequency AC voltage to the atomic force microscopy tip while driving the cantilever near its resonance frequency. Frequency mixing due to the nonlinear capacitance gives intermodulation products of the two drive frequencies near the cantilever resonance, where they are measured with high signal to noise ratio. Analysis of this intermodulation response allows for quantitative reconstruction of the contact potential difference. We derive the theory of the method, validate it with numerical simulation and a control experiment, and we demonstrate its utility for fast imaging of the surface photo-voltage on an organic photo-voltaic material.

  19. Tandem Mirror Reactor Systems Code (Version I)

    SciTech Connect (OSTI)

    Reid, R.L.; Finn, P.A.; Gohar, M.Y.; Barrett, R.J.; Gorker, G.E.; Spampinaton, P.T.; Bulmer, R.H.; Dorn, D.W.; Perkins, L.J.; Ghose, S.

    1985-09-01

    A computer code was developed to model a Tandem Mirror Reactor. Ths is the first Tandem Mirror Reactor model to couple, in detail, the highly linked physics, magnetics, and neutronic analysis into a single code. This report describes the code architecture, provides a summary description of the modules comprising the code, and includes an example execution of the Tandem Mirror Reactor Systems Code. Results from this code for two sensitivity studies are also included. These studies are: (1) to determine the impact of center cell plasma radius, length, and ion temperature on reactor cost and performance at constant fusion power; and (2) to determine the impact of reactor power level on cost.

  20. Ningbo Qixin Photo electricity Co Ltd | Open Energy Information

    Open Energy Info (EERE)

    Qixin Photo electricity Co Ltd Jump to: navigation, search Name: Ningbo Qixin Photo-electricity Co Ltd Place: Ningbo, Zhejiang Province, China Zip: 315000 Sector: Solar Product:...

  1. Photo of the Week: Lego Rendition of SLAC National Laboratory...

    Energy Savers [EERE]

    See an actual photo of the SLAC linac. | Photo courtesy of Greg Stewart, SLAC National Accelerator Laboratory. Sarah Gerrity Sarah Gerrity Former Multimedia Editor, Office of ...

  2. Tianjin Tai Yang Photo electronic Technology Co Ltd | Open Energy...

    Open Energy Info (EERE)

    Tai Yang Photo electronic Technology Co Ltd Jump to: navigation, search Name: Tianjin Tai Yang Photo-electronic Technology Co., Ltd Place: Tianjin Municipality, China Sector: Solar...

  3. Photo Album Of FAPAC - NM Activities | National Nuclear Security...

    National Nuclear Security Administration (NNSA)

    Our Locations Albuquerque Complex Federal Asian Pacific American Council - New Mexico Chapter Albuquerque, NM Photo Album Of FAPAC - NM Activities Photo Album Of FAPAC -...

  4. Calculation of the neutron structure function by using A = 3 mirror nuclei and a quark exchange formalism

    SciTech Connect (OSTI)

    Modarres, M.; Zolfagharpour, F.; Yazdanpanah, M.M.

    2005-05-06

    It is demonstrated that the free neutron structure function can be extracted in deep inelastic scattering from A = 3 mirror nuclei i.e. 3He and 3H, and our extracted free neutron structure function agrees with the experiments.

  5. Electric dipole radiation near a mirror

    SciTech Connect (OSTI)

    Li Xin; Arnoldus, Henk F.

    2010-05-15

    The emission of radiation by a linearly oscillating electric dipole is drastically altered when the dipole is close to the surface of a mirror. The energy is not emitted along optical rays, as for a free dipole, but as a set of four optical vortices. The field lines of energy flow spiral around a set of two lines through the dipole. At a larger distance from the dipole, singularities and isolated vortices appear. It is shown that these interference vortices are due to the vanishing of the magnetic field at their centers. In the plane of the mirror there is a singular circle with a diameter which is proportional to the distance between the dipole and the mirror. Inside this circle, all energy flows to a singularity on the mirror surface.

  6. Mirror Advanced Reactor Study interim design report

    SciTech Connect (OSTI)

    Not Available

    1983-04-01

    The status of the design of a tenth-of-a-kind commercial tandem-mirror fusion reactor is described at the midpoint of a two-year study. When completed, the design is to serve as a strategic goal for the mirror fusion program. The main objectives of the Mirror Advanced Reactor Study (MARS) are: (1) to design an attractive tandem-mirror fusion reactor producing electricity and synfuels (in alternate versions), (2) to identify key development and technology needs, and (3) to exploit the potential of fusion for safety, low activation, and simple disposal of radioactive waste. In the first year we have emphasized physics and engineering of the central cell and physics of the end cell. Design optimization and trade studies are continuing, and we expect additional modifications in the end cells to further improve the performance of the final design.

  7. Coating considerations for mirrors of CPV devices

    SciTech Connect (OSTI)

    Schmauder, Torsten; Sauer, Peter; Ickes, Gerd

    2014-09-26

    One of the different optical concepts for concentrator devices is to place a focussing primary mirror behind a transparent front plate. In addition (also in case of Fresnel-diffractive main optics), further 'secondary' reflectors may be used further along the beam path. Such mirrors are usually implemented as coating stacks of a highly reflective metal - usually silver - and protective layers. The protective layers are preferably designed as reflection enhancing interference stack. The design of such protective layer stacks yields two difficulties, which are addressed in this paper: (a) vacuum coating of three-dimensional parts will result in a thickness distribution and the optical design of the stack should thus be tolerant to layer thickness variations, and (b) different places of the mirror will have different angle-of-incidence of the sunlight under operating conditions. As result, the layer stack has a different design at different places of the mirror.

  8. Evidence for photo-induced monoclinic metallic VO{sub 2} under high pressure

    SciTech Connect (OSTI)

    Hsieh, Wen-Pin Mao, Wendy L.; Trigo, Mariano; Reis, David A.; Andrea Artioli, Gianluca; Malavasi, Lorenzo

    2014-01-13

    We combine ultrafast pump-probe spectroscopy with a diamond-anvil cell to decouple the insulator-metal electronic transition from the lattice symmetry changing structural transition in the archetypal strongly correlated material vanadium dioxide. Coherent phonon spectroscopy enables tracking of the photo-excited phonon vibrational frequencies of the low temperature, monoclinic (M{sub 1})-insulating phase that transforms into the metallic, tetragonal rutile structured phase at high temperature or via non-thermal photo-excitations. We find that in contrast with ambient pressure experiments where strong photo-excitation promptly induces the electronic transition along with changes in the lattice symmetry, at high pressure, the coherent phonons of the monoclinic (M{sub 1}) phase are still clearly observed upon the photo-driven phase transition to a metallic state. These results demonstrate the possibility of synthesizing and studying transient phases under extreme conditions.

  9. Motorized control for mirror mount apparatus

    DOE Patents [OSTI]

    Cutburth, Ronald W.

    1989-01-01

    A motorized control and automatic braking system for adjusting mirror mount apparatus is disclosed. The motor control includes a planetary gear arrangement to provide improved pitch adjustment capability while permitting a small packaged design. The motor control for mirror mount adjustment is suitable for laser beam propagation applications. The brake is a system of constant contact, floating detents which engage the planetary gear at selected between-teeth increments to stop rotation instantaneously when the drive motor stops.

  10. PHOTOS: 10 Carbon-Fighting Energy Technologies

    Broader source: Energy.gov [DOE]

    Scroll through the photo gallery to see just a few of the ways the Energy Department is addressing climate change through technologies that cut carbon pollution, grow the economy and protect the planet.

  11. PHOTOS: 11 Carbon-Fighting Energy Technologies

    Office of Energy Efficiency and Renewable Energy (EERE)

    Scroll through the photo gallery to see just a few of the ways the Energy Department is addressing climate change through technologies that cut carbon pollution, grow the economy and protect the planet.

  12. PhotoSolar | Open Energy Information

    Open Energy Info (EERE)

    which combines effective solar shading and sets new standards for transparent photovoltaic devices. References: PhotoSolar1 This article is a stub. You can help OpenEI by...

  13. DOE - NNSA/NFO -- Photo Library Scenery

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

    Scenery NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - Scenery The Nevada National Security Site boasts beautiful scenery with many bluffs, hills, valleys, plains, and mountains. Instructions: Click the photograph THUMBNAIL to view the photograph details Click the Category, Number, or Date table header links to sort the information Thumbnail Category Number Date http://www.nv.doe.gov/library/photos/thumbs/DSC01563.jpg Scenery

  14. Fermilab | About Fermilab | Photo and Video Gallery

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

    About Fermilab Navbar Toggle About Quick Info Science History Leadership and Organization Leadership Organizational chart Committees and Councils Photo and Video Gallery Diversity Education Safety Sustainability and Environment Contact Related Links DOE FRA UChicago URA Newsroom Spotlight Press releases Fact sheets and brochures symmetry Interactions.org Photo and video archive Resources for ... Employees Researchers, postdocs and graduate students Job seekers Neighbors Industry K-12 students,

  15. OREM Photo Gallery | Department of Energy

    Energy Savers [EERE]

    OREM Photo Gallery OREM Photo Gallery Addthis ETTP (Before) 1 of 6 ETTP (Before) ETTP spans approximately 2,200 acres, and before we initiated cleanup, the site contained more than 600 buildings. Our employees are working to remove radiological contaminants, primarily uranium, and a wide range of chemical components from the site. ETTP (After) 2 of 6 ETTP (After) Our goals are to complete legacy cleanup, commemorate the historical achievements that happened at the site, and transfer the

  16. Design of a Thermal Imaging Diagnostic Using 90-Degree, Off-Axis, Parabolic Mirrors

    SciTech Connect (OSTI)

    Malone, Robert M.; Becker, Steven A.; Dolan, Daniel H.; Hacking, Richard G.; Hickman, Randy J.; Kaufman, Morris I.; Stevens, Gerald D.; Turley, William D.

    2006-09-01

    Thermal imaging is an important, though challenging, diagnostic for shockwave experiments. Shock-compressed materials undergo transient temperature changes that cannot be recorded with standard (greater than ms response time) infrared detectors. A further complication arises when optical elements near the experiment are destroyed. We have designed a thermal-imaging system for studying shock temperatures produced inside a gas gun at Sandia National Laboratories. Inexpensive, diamond-turned, parabolic mirrors relay an image of the shocked target to the exterior of the gas gun chamber through a sapphire vacuum port. The 30005000-nm portion of this image is directed to an infrared camera which acquires a snapshot of the target with a minimum exposure time of 150 ns. A special mask is inserted at the last intermediate image plane, to provide dynamic thermal background recording during the event. Other wavelength bands of this image are split into high-speed detectors operating at 9001700 nm, and at 17003000 nm for timeresolved pyrometry measurements. This system incorporates 90-degree, off-axis parabolic mirrors, which can collect low f/# light over a broad spectral range, for high-speed imaging. Matched mirror pairs must be used so that aberrations cancel. To eliminate image plane tilt, proper tip-to-tip orientation of the parabolic mirrors is required. If one parabolic mirror is rotated 180 degrees about the optical axis connecting the pair of parabolic mirrors, the resulting image is tilted by 60 degrees. Different focal-length mirrors cannot be used to magnify the image without substantially sacrificing image quality. This paper analyzes performance and aberrations of this imaging diagnostic.

  17. Photo-ionization and residual electron effects in guided streamers

    SciTech Connect (OSTI)

    Wu, S.; Lu, X. Liu, D.; Yang, Y.; Pan, Y.; Ostrikov, K.

    2014-10-15

    Complementary experiments and numerical modeling reveal the important role of photo-ionization in the guided streamer propagation in helium-air gas mixtures. It is shown that the minimum electron concentration ?10{sup 8?}cm{sup ?3} is required for the regular, repeated propagation of the plasma bullets, while the streamers propagate in the stochastic mode below this threshold. The stochastic-to-regular mode transition is related to the higher background electron density in front of the propagating streamers. These findings help improving control of guided streamer propagation in applications from health care to nanotechnology and improve understanding of generic pre-breakdown phenomena.

  18. Four-mirror extreme ultraviolet (EUV) lithography projection system

    DOE Patents [OSTI]

    Cohen, Simon J; Jeong, Hwan J; Shafer, David R

    2000-01-01

    The invention is directed to a four-mirror catoptric projection system for extreme ultraviolet (EUV) lithography to transfer a pattern from a reflective reticle to a wafer substrate. In order along the light path followed by light from the reticle to the wafer substrate, the system includes a dominantly hyperbolic convex mirror, a dominantly elliptical concave mirror, spherical convex mirror, and spherical concave mirror. The reticle and wafer substrate are positioned along the system's optical axis on opposite sides of the mirrors. The hyperbolic and elliptical mirrors are positioned on the same side of the system's optical axis as the reticle, and are relatively large in diameter as they are positioned on the high magnification side of the system. The hyperbolic and elliptical mirrors are relatively far off the optical axis and hence they have significant aspherical components in their curvatures. The convex spherical mirror is positioned on the optical axis, and has a substantially or perfectly spherical shape. The spherical concave mirror is positioned substantially on the opposite side of the optical axis from the hyperbolic and elliptical mirrors. Because it is positioned off-axis to a degree, the spherical concave mirror has some asphericity to counter aberrations. The spherical concave mirror forms a relatively large, uniform field on the wafer substrate. The mirrors can be tilted or decentered slightly to achieve further increase in the field size.

  19. Experiments

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

    Experiments - Sandia Energy Energy Search Icon Sandia Home Locations Contact Us Employee Locator Energy & Climate Secure & Sustainable Energy Future Stationary Power Energy Conversion Efficiency Solar Energy Wind Energy Water Power Supercritical CO2 Geothermal Natural Gas Safety, Security & Resilience of the Energy Infrastructure Energy Storage Nuclear Power & Engineering Grid Modernization Battery Testing Nuclear Energy Defense Waste Management Programs Advanced Nuclear Energy

  20. Alignment and focus of mirrored facets of a heliosat

    DOE Patents [OSTI]

    Yellowhair, Julius E; Ho, Clifford Kuofei; Diver, Richard B; Moss, Timothy A

    2013-11-12

    Various technologies pertaining to aligning and focusing mirrored facets of a heliostat are described herein. Updating alignment and/or focus of mirrored facets is undertaken through generation of a theoretical image, wherein the theoretical image is indicative of a reflection of the target via the mirrored facets when the mirrored facets are properly aligned. This theoretical image includes reference points that are overlaid on an image of the target as reflected by the mirrored facets of the heliostat. A technician adjusts alignment/focus of a mirrored facet by causing reflected reference markings to become aligned with the reference points in the theoretical image.

  1. Experiment

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

    MiniBooNE Experiment September, 2002 SeptemMyungkee Sung (LSU/MiniBooNE) 4th International Workshop on the Identification of Dark Matter Cosmologically Interesting Region; Hot Dark Matter? LSND Signal at High ∆m 2 KARMEN II narrowed the signal region MiniBooNE will fully address this signal. Neutrino Osillation at High ∆m 2 LSND: Searching for ν µ →ν e ν µ - From µ + decay at rest with endpoint energy 53 MeV L = 30m, L/E ~ 1m/MeV, 167 tons of Mineral Oil Look for ν e Appearance: ν

  2. Adhesion and chemical vapor testing of second surface silver/glass solar mirrors

    SciTech Connect (OSTI)

    Dake, L.S.; Lind, M.A.

    1980-09-01

    Second surface silvered glass mirrors supplied by four different commercial manufacturers were evaluated for silver-to-glass adhesion and resistance to chemical vapor attack. The mirrors were chemically silvered on identical substrates of low iron float glass. Experiments were performed in order to assess the viability of using adhesion and chemical attack as screening tests for predicting the relative long-term durability of solar mirrors. The results of these tests will be compared at a future time with the survivability of field mirrors deployed in stationary exposure racks at ten locations throughout the United States. The adhesion tests were performed using a commercially-available thin film tensile pull tester in which a stud bonded to the film is pulled and the yield load recorded. Numerous subtleties regarding the selection of the adhesive used to bond the study and the validity of the testing procedure are discussed. Several different methods of normalizing the results were attempted in an effort to reduce the scatter in the data. The same set of samples were exposed to salt spray, water, HCl, H/sub 2/SO/sub 4/, and HNO/sub 3/ vapors and then ranked according to their performance. Visual comparison of tested samples did not yield consistent results; however, definite trends were observed favoring one of the manufacturers. Some SEM/EDX analysis was performed on these mirrors subject to accelerated degradation in order to compare them to mirrors subject to natural degradation. However, insufficient data has been collected to show that any of the tests performed will accurately predict the relative life expectancy of the mirrors in an outdoor environment.

  3. Solid State Replacement of Rotating Mirror Cameras

    SciTech Connect (OSTI)

    Frank, A M; Bartolick, J M

    2006-08-25

    Rotating mirror cameras have been the mainstay of mega-frame per second imaging for decades. There is still no electronic camera that can match a film based rotary mirror camera for the combination of frame count, speed, resolution and dynamic range. The rotary mirror cameras are predominantly used in the range of 0.1 to 100 micro-seconds per frame, for 25 to more than a hundred frames. Electron tube gated cameras dominate the sub microsecond regime but are frame count limited. Video cameras are pushing into the microsecond regime but are resolution limited by the high data rates. An all solid state architecture, dubbed ''In-situ Storage Image Sensor'' or ''ISIS'', by Prof. Goji Etoh, has made its first appearance into the market and its evaluation is discussed. Recent work at Lawrence Livermore National Laboratory has concentrated both on evaluation of the presently available technologies and exploring the capabilities of the ISIS architecture. It is clear though there is presently no single chip camera that can simultaneously match the rotary mirror cameras, the ISIS architecture has the potential to approach their performance.

  4. Charge exchange cooling in the tandem mirror plasma confinement apparatus

    DOE Patents [OSTI]

    Logan, B. Grant

    1978-01-01

    Method and apparatus for cooling a plasma of warm charged species confined in the center mirror cell of the tandem mirror apparatus by injecting cold neutral species of the plasma into at least one mirroring region of the center mirror cell, the cooling due to the loss of warm charged species through charge exchange with the cold neutral species with resulting diffusion of the warm neutral species out of the plasma.

  5. Cascade photo production at CLAS

    SciTech Connect (OSTI)

    Goetz, John; Hicks, Kenneth H.

    2014-09-01

    The famous discovery of the Omega ? in 1964 put the quark model on firm ground and since then a lot of effort has been spent on mapping out the baryonic and mesonic states. Over the following decades, many excited baryons with light quarks (up, down and strange) have been measured, but by most predictions, only a small percentage of those expected have been found. In this talk, I will discuss a newly developing technique using an (unflavored) photon beam to excite protons to doubly-strange "Cascade" (Xi) states. Advantages of such an experiment and associated difficulties will be presented, along with recent results from the CLAS detector at Jefferson Lab in Virginia.

  6. Scalable stacked array piezoelectric deformable mirror for astronomy and laser processing applications

    SciTech Connect (OSTI)

    Wlodarczyk, Krystian L. Maier, Robert R. J.; Hand, Duncan P.; Bryce, Emma; Hutson, David; Kirk, Katherine; Schwartz, Noah; Atkinson, David; Beard, Steven; Baillie, Tom; Parr-Burman, Phil; Strachan, Mel; UK Astronomy Technology Centre, Royal Observatory, Edinburgh EH9 3HJ

    2014-02-15

    A prototype of a scalable and potentially low-cost stacked array piezoelectric deformable mirror (SA-PDM) with 35 active elements is presented in this paper. This prototype is characterized by a 2 ?m maximum actuator stroke, a 1.4 ?m mirror sag (measured for a 14 mm 14 mm area of the unpowered SA-PDM), and a 200 nm hysteresis error. The initial proof of concept experiments described here show that this mirror can be successfully used for shaping a high power laser beam in order to improve laser machining performance. Various beam shapes have been obtained with the SA-PDM and examples of laser machining with the shaped beams are presented.

  7. Eta Structure Function via Photo-production

    SciTech Connect (OSTI)

    Ghahramany, N.; Ghanaatian, M.; Bazrafshan, A.

    2008-04-21

    By using isobar model and the latest data, the structure function of Eta particle is calculated in the process of photo-production. This calculation is carried out for photon energy range of 0.750-3 GeV. The variations of the structure function are given in terms of scattering angle for different incoming photon energy.

  8. Lens system for a photo ion spectrometer

    DOE Patents [OSTI]

    Gruen, Dieter M.; Young, Charles E.; Pellin, Michael J.

    1990-01-01

    A lens system in a photo ion spectrometer for manipulating a primary ion beam and ionized atomic component. The atomic components are removed from a sample by a primary ion beam using the lens system, and the ions are extracted for analysis. The lens system further includes ionization resistant coatings for protecting the lens system.

  9. Lens system for a photo ion spectrometer

    DOE Patents [OSTI]

    Gruen, D.M.; Young, C.E.; Pellin, M.J.

    1990-11-27

    A lens system in a photo ion spectrometer for manipulating a primary ion beam and ionized atomic component is disclosed. The atomic components are removed from a sample by a primary ion beam using the lens system, and the ions are extracted for analysis. The lens system further includes ionization resistant coatings for protecting the lens system. 8 figs.

  10. EUV mirror based absolute incident flux detector

    DOE Patents [OSTI]

    Berger, Kurt W.

    2004-03-23

    A device for the in-situ monitoring of EUV radiation flux includes an integrated reflective multilayer stack. This device operates on the principle that a finite amount of in-band EUV radiation is transmitted through the entire multilayer stack. This device offers improvements over existing vacuum photo-detector devices since its calibration does not change with surface contamination.

  11. Method for making mirrored surfaces comprising superconducting material

    DOE Patents [OSTI]

    Early, J.T.; Hargrove, R.S.

    1989-12-12

    Superconducting mirror surfaces are provided by forming a mirror surface from a material which is superconductive at a temperature above about 40 K and adjusting the temperature of the surface to that temperature at which the material is superconducting. The mirror surfaces are essentially perfect reflectors for electromagnetic radiation with photon energy less than the superconducting band gap.

  12. Method for making mirrored surfaces comprising superconducting material

    DOE Patents [OSTI]

    Early, James T.; Hargrove, R. Steven

    1989-01-01

    Superconducting mirror surfaces are provided by forming a mirror surface from a material which is superconductive at a temperature above about 40.degree. K. and adjusting the temperature of the surface to that temperature at which the material is superconducting. The mirror surfaces are essentially perfect reflectors for electromagnetic radiation with photon energy less than the superconducting band gap.

  13. Photo of the Week: June 22, 2012 | Department of Energy

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

    getfeature.cfm?FeatureNumberf20130107-00">Learn more about the 2013 FIRST Robotics Competition. | Photo courtesy of Oak Ridge National Laboratory. Photo of the Week: I,...

  14. Photo of the Week: Air Supply | Department of Energy

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

    This week, the latest vehicles technologies are on display at the Washington Auto Show in ... Photo of the Week: the 2014 Washington Auto Show In this August 2013 photo, Pete Johnson ...

  15. Photo Gallery (1947-Present) | OSTI, US Dept of Energy Office...

    Office of Scientific and Technical Information (OSTI)

    Photo Gallery (1947-Present) To view OSTI Historical Photo Gallery, you can browse the collections below. 1940s | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s 1960s Key Punch ...

  16. Water Power For a Clean Energy Future Cover Photo | Department...

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

    For a Clean Energy Future Cover Photo Water Power For a Clean Energy Future Cover Photo Image icon Water Power For a Clean Energy Future Cover.JPG More Documents & Publications ...

  17. Photo-induced hydrogen production in a helical peptide incorporating...

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

    Photo-induced hydrogen production in a helical peptide incorporating a FeFe hydrogenase active site mimic Authors: Roy, A., Madden, C., and Ghirlanda, G. Title: Photo-induced...

  18. Microsoft Word - Final Release of Two Photos and Captions for...

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

    DOE- DRMMYY Photos of New WIPP Transportation Exhibit's Debut At the National Museum of Nuclear Science and History CARLSBAD, N.M., November 9, 2011- Photo 1 caption: A visitor...

  19. 2014 Offshore Wind Market & Economic Analysis Cover Photo | Department...

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

    4 Offshore Wind Market & Economic Analysis Cover Photo 2014 Offshore Wind Market & Economic Analysis Cover Photo Navigant 2014 Offshore Wind Market and Economic Analysis.JPG (33.04 ...

  20. Moser Baer PhotoVoltaic Ltd | Open Energy Information

    Open Energy Info (EERE)

    PhotoVoltaic Ltd Jump to: navigation, search Name: Moser Baer PhotoVoltaic Ltd Place: New Delhi, Delhi (NCT), India Zip: 110020 Product: New Delhi-based PV cell manufacturer....

  1. Gallivare PhotoVoltaic AB | Open Energy Information

    Open Energy Info (EERE)

    Gallivare PhotoVoltaic AB Jump to: navigation, search Name: Gallivare PhotoVoltaic AB Place: Gllivare, Sweden Zip: 982 28 Product: Swedish manufacturer of PV modules at its...

  2. Photo of the Week: Alaska's Future in Renewable Energy | Department...

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

    getfeature.cfm?FeatureNumberf20130107-00">Learn more about the 2013 FIRST Robotics Competition. | Photo courtesy of Oak Ridge National Laboratory. Photo of the Week: I,...

  3. FIELD EXPERIENCE WITH 3-SUN MIRROR MODULE SYSTEMS

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

    DUAL FOCUS CASSEGRAINIAN MODULE CAN ACHIEVE >45% EFFICIENCY L. M. Fraas 1 , J. E. Avery 1 , J. E. Strauch 2 , G. Girard 2 1 JX Crystals Inc, Issaquah, WA 98027, 2 Sandia National Laboratories, Albuquerque, NM 87185 Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy's National Nuclear Security Administration under Contract DE-AC04-94AL85000. ABSTRACT Various types of multijunction solar cells have now been

  4. Photo of the Week: Air Supply | Department of Energy

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

    Air Supply Photo of the Week: Air Supply February 6, 2014 - 11:02am Addthis In this 1972 photo, two scientists worked in improved supplied-air suits, which protected workers from toxic environments and protected controlled atmospheric areas from exposure to human emissions. The suits were developed at the Oak Ridge Y-12 Plant in Tennessee. | Photo courtesy of the Energy Department. In this 1972 photo, two scientists worked in improved supplied-air suits, which protected workers from toxic

  5. Photo Gallery: National Labs and the Science Behind Nuclear Security...

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

    computing; national security; engines; alternative fuels; environmental science; physics; chemistry and biological sciences. Image: Photo courtesy of Argonne...

  6. Photo of the Week: Laser Beats Rock | Department of Energy

    Office of Environmental Management (EM)

    mission. Photo courtesy of NASAJPL-CaltechMSSS Quick Fix Gives ...

  7. Collegiate Wind Competition 2016 Photos | Department of Energy

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

    Photos Collegiate Wind Competition 2016 Photos First place celebration. 1 of 28 First place celebration. Students from The Pennsylvania State University happily carry their first place trophy off stage. Photo by Dennis Schroeder, NREL Date taken: 2016-06-01 19:02 Collegiate Wind Competition 2016 Trophies. 2 of 28 Collegiate Wind Competition 2016 Trophies. The prize table holding all of the trophies to be awarded at the Collegiate Wind Competition 2016. Photo by Dennis Schroeder, NREL Date taken:

  8. Gallery of Historic Photos | Y-12 National Security Complex

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

    Gallery of Historic Photos Gallery of Historic Photos Ed Westcott Manhattan Project official photographer. All photos in our History section are by Ed Westcott, the government's official photographer for the Manhattan project. Pages 1 2 3 4 5 6 next › last »

  9. 'Bradbury Science Museum Collections Inventory Photos Disc #4

    SciTech Connect (OSTI)

    Strohmeyer, Wendy J.

    2015-11-16

    The photos on Bradbury Science Museum Collections Inventory Photos Disc #4 is another in an ongoing effort to catalog all artifacts held by the Museum. Photos will be used as part of the condition report for the artifact, and will become part of the collection record in the collections database for that artifact. The collections database will be publically searchable on the Museum website.

  10. Silicon nitride protective coatings for silvered glass mirrors

    DOE Patents [OSTI]

    Tracy, C.E.; Benson, D.K.

    1984-07-20

    A protective diffusion barrier for metalized mirror structures is provided by a layer or coating of silicon nitride which is a very dense, transparent, dielectric material that is impervious to water, alkali, and other impurities and corrosive substances that typically attack the metal layers of mirrors and cause degradation of the mirrors' reflectivity. The silicon nitride layer can be deposited on the substrate prior to metal deposition thereon to stabilize the metal/substrate interface, and it can be deposited over the metal to encapsulate it and protect the metal from corrosion or other degradation. Mirrors coated with silicon nitride according to this invention can also be used as front surface mirrors.

  11. Silicon nitride protective coatings for silvered glass mirrors

    DOE Patents [OSTI]

    Tracy, C. Edwin; Benson, David K.

    1988-01-01

    A protective diffusion barrier for metalized mirror structures is provided by a layer or coating of silicon nitride which is a very dense, transparent, dielectric material that is impervious to water, alkali, and other impurities and corrosive substances that typically attack the metal layers of mirrors and cause degradation of the mirrors' reflectivity. The silicon nitride layer can be deposited on the substrate before metal deposition to stabilize the metal/substrate interface, and it can be deposited over the metal to encapsulate it and protect the metal from corrosion or other degradation. Mirrors coated with silicon nitride according to this invention can also be used as front surface mirrors.

  12. photo_Manhattan.png | OSTI, US Dept of Energy Office of Scientific and

    Office of Scientific and Technical Information (OSTI)

    Technical Information photo_Manhattan.png

  13. photo_head_dress_wind.jpg | OSTI, US Dept of Energy Office of Scientific

    Office of Scientific and Technical Information (OSTI)

    and Technical Information photo_head_dress_wind

  14. Particle deconfinement in a bent magnetic mirror

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

    Gueroult, Renaud; Fisch, Nathaniel J.

    2012-11-06

    Here, coils misalignment in a magnetic mirror can produce additional particle transport. The magnetic field non axi-symmetry is responsible for radial and longitudinal drifts in a way much similar to the neo-classical transport in a tandem mirror cell distorted by end plugs. Accordingly, a regime exhibiting large radial displacements––similar to the resonant regime in tandem mirrors––can be obtained by confining ions azimuthally, for example by means of a properly tuned radial electric field. Because of the mass dependence of the magnetic field non-homogeneity drift velocities, the azimuthal trapping is mass specific, allowing, in principle, the filtering of a specific speciesmore » based on its mass.« less

  15. Fiber optics welder having movable aligning mirror

    DOE Patents [OSTI]

    Higgins, Robert W.; Robichaud, Roger E.

    1981-01-01

    A system for welding fiber optic waveguides together. The ends of the two fibers to be joined together are accurately, collinearly aligned in a vertical orientation and subjected to a controlled, diffuse arc to effect welding and thermal conditioning. A front-surfaced mirror mounted at a 45.degree. angle to the optical axis of a stereomicroscope mounted for viewing the junction of the ends provides two orthogonal views of the interface during the alignment operation.

  16. Engineering problems of tandem-mirror reactors

    SciTech Connect (OSTI)

    Moir, R.W.; Barr, W.L.; Boghosian, B.M.

    1981-10-22

    We have completed a comparative evaluation of several end plug configurations for tandem mirror fusion reactors with thermal barriers. The axi-cell configuration has been selected for further study and will be the basis for a detailed conceptual design study to be carried out over the next two years. The axi-cell end plug has a simple mirror cell produced by two circular coils followed by a transition coil and a yin-yang pair, which provides for MHD stability. This paper discusses some of the many engineering problems facing the designer. We estimated the direct cost to be 2$/W/sub e/. Assuming total (direct and indirect) costs to be twice this number, we need to reduce total costs by factors between 1.7 and 2.3 to compete with future LWRs levelized cost of electricity. These reductions may be possible by designing magnets producing over 20T made possible by use of combinations of superconducting and normal conducting coils as well as improvements in performance and cost of neutral beam and microwave power systems. Scientific and technological understanding and innovation are needed in the area of thermal barrier pumping - a process by which unwanted particles are removed (pumped) from certain regions of velocity and real space in the end plug. Removal of exhaust fuel ions, fusion ash and impurities by action of a halo plasma and plasma dump in the mirror end region is another challenging engineering problem discussed in this paper.

  17. Photo-induced electron transfer method

    DOE Patents [OSTI]

    Wohlgemuth, Roland; Calvin, Melvin

    1984-01-01

    The efficiency of photo-induced electron transfer reactions is increased and the back transfer of electrons in such reactions is greatly reduced when a photo-sensitizer zinc porphyrin-surfactant and an electron donor manganese porphyrin-surfactant are admixed into phospho-lipid membranes. The phospholipids comprising said membranes are selected from phospholipids whose head portions are negatively charged. Said membranes are contacted with an aqueous medium in which an essentially neutral viologen electron acceptor is admixed. Catalysts capable of transfering electrons from reduced viologen electron acceptor to hydrogen to produce elemental hydrogen are also included in the aqueous medium. An oxidizable olefin is also admixed in the phospholipid for the purpose of combining with oxygen that coordinates with oxidized electron donor manganese porphyrin-surfactant.

  18. Photo-induced electron transfer method

    DOE Patents [OSTI]

    Wohlgemuth, R.; Calvin, M.

    1984-01-24

    The efficiency of photo-induced electron transfer reactions is increased and the back transfer of electrons in such reactions is greatly reduced when a photo-sensitizer zinc porphyrin-surfactant and an electron donor manganese porphyrin-surfactant are admixed into phospholipid membranes. The phospholipids comprising said membranes are selected from phospholipids whose head portions are negatively charged. Said membranes are contacted with an aqueous medium in which an essentially neutral viologen electron acceptor is admixed. Catalysts capable of transferring electrons from reduced viologen electron acceptor to hydrogen to produce elemental hydrogen are also included in the aqueous medium. An oxidizable olefin is also admixed in the phospholipid for the purpose of combining with oxygen that coordinates with oxidized electron donor manganese porphyrin-surfactant.

  19. Fermilab | Science at Fermilab | Experiments & Projects | Cosmic...

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

    How it works Questions for the Universe Scientific results Experiments CDMS COUPP GammeV Pierre Auger SDSS Dark Energy Survey Proposed Projects and Experiments photo-cosmic Cosmic ...

  20. DOE - NNSA/NFO -- Photo Library AMS

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

    AMS NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - Aerial Measuring System (AMS) The Aerial Measuring System is one of the emergency response resources, or assets, administered by NNSA. Aerial Measuring System (AMS) detects, measures, and tracks radioactive material at an emergency to determine contamination levels. Instructions: Click the photograph THUMBNAIL to view the photograph details Click the Category, Number, or Date table header links to sort the

  1. DOE - NNSA/NFO -- Photo Library Animals

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

    Animals NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - Animals Coyotes, kit foxes, pronghorn antelope, desert tortoises, sidewinder snakes, bald eagles, kangaroo rats and peregrine falcons are just a few of the more than 1,500 animal species found on the Nevada National Security Site. Instructions: Click the document THUMBNAIL to view the photograph details. Click the Category, Number, or Date table header links to sort the information. Thumbnail Category Number

  2. DOE - NNSA/NFO -- Photo Library Craters

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

    Craters NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - Craters Underground testing often leaves visible evidence on the surface in the form of subsidence craters in varying dimensions. Subsidence craters are depressions on the surface that occur when the roof of the blast cavity collapses into the void left by the explosion. The size of the subsidence crater depends on the yield of the device, the depth of emplacement, and the geological characteristics of the

  3. DOE - NNSA/NFO -- Photo Library FRMAC

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

    FRMAC NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - Federal Radiological Monitoring and Assessment Center (FRMAC) The Federal Radiological Monitoring and Assessment Center gathers radiological information such as plume and deposition predictions, air and ground concentrations, exposure rates and dose projections, assurance of data quality, and current meteorological conditions and weather forecasts. Instructions: Click the photograph THUMBNAIL to view the

  4. DOE - NNSA/NFO -- Photo Library JASPER

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

    JASPER NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - JASPER The Joint Actinide Shock Physics Experimental Research Facility plays an integral role in the testing of the nation's nuclear weapons stockpile by providing a method to generate and measure data pertaining to the properties of materials (radioactive chemical elements) at high shock pressures, temperatures and strain rates. Instructions: Click the photograph THUMBNAIL to view the photograph details Click

  5. DOE - NNSA/NFO -- Photo Library NPTEC

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

    NPTEC NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - Nonproliferation Test Evaluation Complex (NPTEC) The Nonproliferation Test Evaluation Complex is a unique, one-of-a-kind facility built to conduct hazardous materials testing and training under controlled conditions. The NPTEC can accommodate both large- and small-scale testing. Instructions: Click the photograph THUMBNAIL to view the photograph details Click the Category, Number, or Date table header links to

  6. DOE - NNSA/NFO -- Photo Library PLUMBBOB

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

    Operation Plumbob NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - Operation Plumbbob Operation Plumbbob, conducted between May 28 and October 7, 1957, represented the biggest, longest, and most controversial test series in the history of the Nevada National Security Site (NNSS). [ Full Text ] Instructions: Click the photograph THUMBNAIL to view the photograph details Click the Category, Number, or Date table header links to sort the information The photographs are

  7. DOE - NNSA/NFO -- Photo Library Plants

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

    Plants NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - Plants The Nevada National Security Site boasts more than 750 varieties of plants. About 67 families of plants are represented, however, one-third of them belong to just three families: sunflowers, grasses and buckwheats. Instructions: Click the photograph THUMBNAIL to view the photograph details. Click the Category, Number, or Date table header links to sort the information Thumbnail Category Number Date

  8. DOE - NNSA/NFO -- Photo Library Ranger

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

    Ranger NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - Ranger Operation Ranger was the first continental nuclear test series conducted at the Nevada Proving Ground (now called the Nevada National Security Site). Instructions: Click the photograph THUMBNAIL to view the photograph details Click the Category, Number, or Date table header links to sort the information The photographs are displayed in groups of ten (10). Click the Next and Previous link at the bottom to

  9. DOE - NNSA/NFO -- Photo Library Trinity

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

    Trinity NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - Trinity Trinity Shot was part of the secret Manhattan Project - the atomic bomb project charged with designing, developing, testing, and firing a weaponization of the newly discovered phenomenon, fission. [ Full Text ] Instructions: Click the photograph THUMBNAIL to view the photograph details Click the Category, Number, or Date table header links to sort the information The photographs are displayed in groups

  10. Smart Grid Photos | Argonne National Laboratory

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

    Smart Grid Photos Naperville Green Car Show 1 of 12 Naperville Green Car Show Naperville Green Car Show (left to right): Argonne's Jim Spangler, Ann Schlenker, Jason Harper, Hina Chaudhry, George Heindl. Naperville Green Car Show 1 of 12 Naperville Green Car Show Naperville Green Car Show (left to right): Argonne's Jim Spangler, Ann Schlenker, Jason Harper, Hina Chaudhry, George Heindl. Naperville Green Car Show 2 of 12 Naperville Green Car Show Naperville Green Car Show: Smart grid interactive

  11. Alternate protection concepts for second surface silver/glass solar mirrors

    SciTech Connect (OSTI)

    Buckwalter, C.Q.; Dake, L.S.; Hartman, J.S.; Lind, M.A.

    1980-10-01

    Investigations into three technologies having the potential of significantly enhancing the durability of solar mirrors are reported. The approaches are based on the assumption that sealing the silver layer on second surface mirrors from the external environment with protective overcoats will significantly extend their useful service life. Considered are: (1) edge sealing a second sheet of glass over the silver layer using solder glasses, (2) overcoating the silver layer with liquid applied SiO/sub 2/ or TiO/sub 2/ coatings, and (3) overcoating the silver layer with an electroless nickel film. Preliminary experiments were performed using Sb/sub 2/O/sub 5/-K/sub 2/O and PbO based solder glasses to edge seal a second sheet of glass over the silver mirror surface. Problems encountered in the formulation of the Sb/sub 2/O/sub 5/-K/sub 2/O glasses forced abandonment of these low melting point solder glass experiments. Materials compatibility problems were encountered when using several of the commercially available PbO based solder glasses alternatives. A cursory evaluation of liquid SiO/sub 2/ and TiO/sub 2/ coatings was also undertaken. The films were applied as direct overcoats on both silver only and silver/copper mirror substrates. Although the process appeared to yield visually acceptable coatings, under microscopic examination the films were found to be porous and pinhole riddled after the final curing step. Consequently, they did not stand up well to salt spray and HCl vapor tests. Background data were collected in an investigation of overcoating the silver or silver/copper mirrors with an electroless deposited nickel film. Two formulations, one a basic solution, the other a commercial acidic solution, were attempted. Film integrity problems were encountered for fairly thick films in the feasibility experiments attempted. Nevertheless, the concept appears sound and merits further investigation.

  12. Support mechanism for a mirrored surface or other arrangement

    DOE Patents [OSTI]

    Cutburth, Ronald W.

    1987-01-01

    An adjustment mechanism such as a three point spherical mount for adjustably supporting a planer mirror or other type of arrangement relative to a plane defined by a given pair of intersecting perpendicular axes is disclosed herein. This mechanism includes first means for fixedly supporting the mirror or other arrangement such that the latter is positionable within the plane defined by the given pair of intersecting perpendicular axes. This latter means and the mirror or other such arrangement are supported by second means for limited movement back and forth about either of the intersecting axes. Moreover, this second means supports the first means and the mirror or other arrangement such that the latter is not movable in any other way whereby the point on the mirror or other arrangement coinciding with the intersection of the given axes does not move or float, thereby making the ability to adjust the mirror or other such arrangement more precise and accurate.

  13. Electrocurtain coating process for coating solar mirrors

    DOE Patents [OSTI]

    Kabagambe, Benjamin; Boyd, Donald W.; Buchanan, Michael J.; Kelly, Patrick; Kutilek, Luke A.; McCamy, James W.; McPheron, Douglas A.; Orosz, Gary R.; Limbacher, Raymond D.

    2013-10-15

    An electrically conductive protective coating or film is provided over the surface of a reflective coating of a solar mirror by flowing or directing a cation containing liquid and an anion containing liquid onto the conductive surface. The cation and the anion containing liquids are spaced from, and preferably out of contact with one another on the surface of the reflective coating as an electric current is moved through the anion containing liquid, the conductive surface between the liquids and the cation containing liquid to coat the conductive surface with the electrically conductive coating.

  14. Imperfect relativistic mirrors in the quantum regime

    SciTech Connect (OSTI)

    Mendonça, J. T.; Serbeto, A.; Galvão, R. M. O.

    2014-05-15

    The collective backscattering of intense laser radiation by energetic electron beams is considered in the relativistic quantum regime. Exact solutions for the radiation field are obtained, for arbitrary electron pulse shapes and laser intensities. The electron beams act as imperfect nonlinear mirrors on the incident laser radiation. This collective backscattering process can lead to the development of new sources of ultra-short pulse radiation in the gamma-ray domain. Numerical examples show that, for plausible experimental conditions, intense pulses of gamma-rays, due to the double Doppler shift of the harmonics of the incident laser radiation, can be produced using the available technology, with durations less than 1 as.

  15. Image-rotating, 4-mirror, ring optical parametric oscillator

    DOE Patents [OSTI]

    Smith, Arlee V.; Armstrong, Darrell J.

    2004-08-10

    A device for optical parametric amplification utilizing four mirrors oriented in a nonplanar configuration where the optical plane formed by two of the mirrors is orthogonal to the optical plane formed by the other two mirrors and with the ratio of lengths of the laser beam paths approximately constant regardless of the scale of the device. With a cavity length of less than approximately 110 mm, a conversion efficiency of greater than 45% can be achieved.

  16. Axisymmetric Magnetic Mirror Fusion-Fission Hybrid (Conference...

    Office of Scientific and Technical Information (OSTI)

    Conference: Axisymmetric Magnetic Mirror Fusion-Fission Hybrid Citation Details ... Visit OSTI to utilize additional information resources in energy science and technology. A ...

  17. Axisymmetric Magnetic Mirror Fusion-Fission Hybrid (Technical...

    Office of Scientific and Technical Information (OSTI)

    Technical Report: Axisymmetric Magnetic Mirror Fusion-Fission Hybrid Citation Details ... Visit OSTI to utilize additional information resources in energy science and technology. A ...

  18. Miniscule Mirrored Cavities Connect Quantum Memories | U.S. DOE...

    Office of Science (SC) Website

    Miniscule Mirrored Cavities Connect Quantum Memories Basic Energy Sciences (BES) BES Home ... Diamond optical cavities allow laser light (green arrow) to excite electrons on atoms held ...

  19. Simulating Wavefront Correction via Deformable Mirrors at X-Ray...

    Office of Scientific and Technical Information (OSTI)

    Conference: Simulating Wavefront Correction via Deformable Mirrors at X-Ray Beamlines Citation Details In-Document Search Title: Simulating Wavefront Correction via Deformable ...

  20. Axisymmetric Tandem Mirror Magnetic Fusion Energy Power Plant...

    Office of Scientific and Technical Information (OSTI)

    A fusion power plant is described that utilizes a new version of the tandem mirror device including spinning liquid walls. The magnetic configuration is evaluated with an ...

  1. Axisymmetric Tandem Mirror Magnetic Fusion Energy Power Plant...

    Office of Scientific and Technical Information (OSTI)

    Magnetic Fusion Energy Power Plant with Thick Liquid-Walls Citation Details In-Document Search Title: Axisymmetric Tandem Mirror Magnetic Fusion Energy Power Plant with Thick ...

  2. Elliptically Bent X-ray Mirrors with Active Temperature Stabilization

    SciTech Connect (OSTI)

    Yuan, Sheng; Church, Matthew; Yashchuk, Valeriy V.; Goldberg, Kenneth A.; Celestre, Rich; McKinney, Wayne R.; Kirschman, Jonathan; Morrison, Greg; Noll, Tino; Warwick, Tony; Padmore, Howard A.

    2010-01-31

    We present details of design of elliptically bent Kirkpatrick-Baez mirrors developed and successfully used at the Advanced Light Source for submicron focusing. A distinctive feature of the mirror design is an active temperature stabilization based on a Peltier element attached directly to the mirror body. The design and materials have been carefully optimized to provide high heat conductance between the mirror body and substrate. We describe the experimental procedures used when assembling and precisely shaping the mirrors, with special attention paid to laboratory testing of the mirror-temperature stabilization. For this purpose, the temperature dependence of the surface slope profile of a specially fabricated test mirror placed inside a temperature-controlled container was measured. We demonstrate that with active mirror-temperature stabilization, a change of the surrounding temperature by more than 3K does not noticeably affect the mirror figure. Without temperature stabilization, the surface slope changes by approximately 1.5 ?mu rad rms (primarily defocus) under the same conditions.

  3. Nondispersive neutron focusing method beyond the critical angle of mirrors

    DOE Patents [OSTI]

    Ice, Gene E. (Oak Ridge, TN)

    2008-10-21

    This invention extends the Kirkpatrick-Baez (KB) mirror focusing geometry to allow nondispersive focusing of neutrons with a convergence on a sample much larger than is possible with existing KB optical schemes by establishing an array of at least three mirrors and focusing neutrons by appropriate multiple deflections via the array. The method may be utilized with supermirrors, multilayer mirrors, or total external reflection mirrors. Because high-energy x-rays behave like neutrons in their absorption and reflectivity rates, this method may be used with x-rays as well as neutrons.

  4. DOE - NNSA/NFO -- Photo Library NRDS

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

    NRDS NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - Nuclear Rocket Development Station (NRDS) The idea to use atomic energy to propel a rocket for interplanetary travel originated in 1906 when American space pioneer Robert Goddard, a college sophomore, wrote a paper on the use of atomic energy. The concept moved from theory to reality in the mid-1950s when the United States launched a nuclear rocket program called Project Rover. Refer to the following Fact Sheet

  5. High-throughput beamline for attosecond pulses based on toroidal mirrors with microfocusing capabilities

    SciTech Connect (OSTI)

    Frassetto, F.; Poletto, L.; Trabattoni, A.; Anumula, S.; Sansone, G.; Calegari, F.; Nisoli, M.

    2014-10-15

    We have developed a novel attosecond beamline designed for attosecond-pump/attosecond probe experiments. Microfocusing of the Extreme-ultraviolet (XUV) radiation is obtained by using a coma-compensated optical configuration based on the use of three toroidal mirrors controlled by a genetic algorithm. Trains of attosecond pulses are generated with a measured peak intensity of about 3 × 10{sup 11} W/cm{sup 2}.

  6. DOE - NNSA/NFO -- Photo Library Historical Miscellaneous

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

    Historical Miscellaneous NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - Historical Miscellaneous Photos related to the Nevada National Security Site History which do not fall under the other photo categories Instructions: Click the photograph THUMBNAIL to view the photograph details Click the Category, Number, or Date table header links to sort the information The photographs are displayed in groups of ten (10). Click the Next and Previous link at the bottom to

  7. FPD's Perspective Photos - Los Alamos National Labratory - NISA |

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

    Department of Energy FPD's Perspective Photos - Los Alamos National Labratory - NISA FPD's Perspective Photos - Los Alamos National Labratory - NISA 2014 DOE Project Management Workshop 30_FPD Perspective_Photos.pdf (11.13 MB) More Documents & Publications FPD's Perspective Talking Points - Los Alamos National Labratory - NISA Enforcement Letter, Los Alamos National Security, LLC - May 15, 2008 Consent Order, Los Alamos National Security, LLC

  8. Photo Gallery | ANSER Center | Argonne-Northwestern National Laboratory

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

    Photo Gallery Home > News & Events > Photo Gallery 2015 2014 2013 2012 2011 ANSER 2015 Solar Electricity SymposiumPhotos from the 2015 ANSER Solar Electricity Symposium, held April 16-17 at Northwestern University. Pictures of the Symposium speakers are organized according to the Symposium's agenda: Michael Graetzel, Ecole polytechnique fédérale de Lausanne (Keynote); David Mitzi, Duke University; Prashant Kamat, University of Notre Dame; Yang Yang, University of California - Los

  9. 2014 Collegiate Wind Competition Photos | Department of Energy

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

    2014 Collegiate Wind Competition Photos 2014 Collegiate Wind Competition Photos First place team Penn State with their trophy 1 of 19 First place team Penn State with their trophy Pennsylvania State University was selected as the first place overall winner and People's Choice winner of the Collegiate Wind Competition 2014. Photo from U.S. Department of Energy. Date taken: 2014-05-07 18:17 The Collegiate Wind Competition trophies 2 of 19 The Collegiate Wind Competition trophies Collegiate Wind

  10. 2014 Collegiate Wind Competition Photos | Department of Energy

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

    2014 Collegiate Wind Competition Photos 2014 Collegiate Wind Competition Photos Addthis First place team Penn State with their trophy 1 of 19 First place team Penn State with their trophy Pennsylvania State University was selected as the first place overall winner and People's Choice winner of the Collegiate Wind Competition 2014. Photo from U.S. Department of Energy. Date taken: 2014-05-07 18:17 The Collegiate Wind Competition trophies 2 of 19 The Collegiate Wind Competition trophies Collegiate

  11. Collegiate Wind Competition 2016 Photos | Department of Energy

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

    Collegiate Wind Competition 2016 Photos Collegiate Wind Competition 2016 Photos Addthis First place celebration. 1 of 28 First place celebration. Students from The Pennsylvania State University happily carry their first place trophy off stage. Photo by Dennis Schroeder, NREL Date taken: 2016-06-01 19:02 Collegiate Wind Competition 2016 Trophies. 2 of 28 Collegiate Wind Competition 2016 Trophies. The prize table holding all of the trophies to be awarded at the Collegiate Wind Competition 2016.

  12. Photo of the Week: July 28, 2012 | Department of Energy

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

    ... Photo of the Week: LBNL Takes Over @Energy's Instagram Super HILAC (Super Heavy Ion Linear Accelerator) was one of the first particle accelerators that could accelerate heavier ...

  13. Photo-patterning Poly(p-phenylenevinylene) from Xanthate Precursor...

    Office of Scientific and Technical Information (OSTI)

    Title: Photo-patterning Poly(p-phenylenevinylene) from Xanthate Precursor Polymers. Abstract not provided. Authors: Johnson, Ross Stefan ; Wheeler, David Roger ; Dirk, Shawn M. ; ...

  14. Earth Day 2016 Photo Contest Entries | Department of Energy

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

    Conservation Community Alternative Power Energy Efficiency Climate Change Adaptation & Resilience This year's Earth Day Photo Contest had well over 150 entries. Our largest ...

  15. DOE - NNSA/NFO -- Photo Library Nevada National Security Site

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

    Library > Nevada National Security Site NNSANFO Language Options U.S. DOENNSA - Nevada Field Office Photo Library - Nevada National Security Site A unique national resource, the ...

  16. Photo of the Week: The Energy Systems Integration Facility |...

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

    Take a tour of the Energy Systems Integration Facility here. | Photo by Dennis Schroeder, NREL. Sarah Gerrity Sarah Gerrity Former Multimedia Editor, Office of Public Affairs Every ...

  17. Photo Gallery: 2015 ARPA-E Innovation Summit Technology Showcase

    Broader source: Energy.gov [DOE]

    Check out our photo gallery of some of the cutting edge technology on display at the 2015 ARPA-E Summit Technology Showcase.

  18. Photo of the Week: Sandia's Centrifuge Test Complex | Department...

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

    students put their wind turbines through rigorous performance testing, crafted their own business plans and pitched their turbine designs to wind industry leaders. In this photo,...

  19. Photo of the Week: The Daya Bay Antineutrino Detector | Department...

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

    data gathered. | Photo by Roy Kaltschmidt, LBNL. Sarah Gerrity Sarah Gerrity Former Multimedia Editor, Office of Public Affairs Every week, we'll feature our favorite ...

  20. West Flank Coso FORGE: well photos and notes

    SciTech Connect (OSTI)

    Doug Blankenship

    2015-12-21

    Photos and detailed down-hole lithology notes for wells CGEH-1 and 74-2 at the West Flank Coso, Ca FORGE location.

  1. Institute of Photo Electronic Thin Film Devices and Technology...

    Open Energy Info (EERE)

    Place: Tianjin Municipality, China Zip: 300071 Sector: Solar Product: A thin-film solar cell research institute in China. References: Institute of Photo-Electronic Thin...

  2. DOE - NNSA/NFO -- Photo Library Environmental Management

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

    Environmental Management NNSANFO Language Options U.S. DOENNSA - Nevada Field Office Photo Library - Environmental Management The Environmental Management Program VisionMission ...

  3. Best of 2013: Our Favorites from Photo of the Week

    Broader source: Energy.gov [DOE]

    From Albuquerque to Antarctica, we're geeking out over some of the coolest science photos we've ever seen.

  4. Background-reducing X-ray multilayer mirror

    DOE Patents [OSTI]

    Bloch, Jeffrey J.; Roussel-Dupre', Diane; Smith, Barham W.

    1992-01-01

    Background-reducing x-ray multilayer mirror. A multiple-layer "wavetrap" deposited over the surface of a layered, synthetic-microstructure soft x-ray mirror optimized for reflectivity at chosen wavelengths is disclosed for reducing the reflectivity of undesired, longer wavelength incident radiation incident thereon. In three separate mirror designs employing an alternating molybdenum and silicon layered, mirrored structure overlaid by two layers of a molybdenum/silicon pair anti-reflection coating, reflectivities of near normal incidence 133, 171, and 186 .ANG. wavelengths have been optimized, while that at 304 .ANG. has been minimized. The optimization process involves the choice of materials, the composition of the layer/pairs as well as the number thereof, and the distance therebetween for the mirror, and the simultaneous choice of materials, the composition of the layer/pairs, and their number and distance for the "wavetrap."

  5. Parametric systems analysis for tandem mirror hybrids

    SciTech Connect (OSTI)

    Lee, J.D.; Chapin, D.L.; Chi, J.W.H.

    1980-09-01

    Fusion fission systems, consisting of fissile producing fusion hybrids combining a tandem mirror fusion driver with various blanket types and net fissile consuming LWR's, have been modeled and analyzed parametrically. Analysis to date indicates that hybrids can be competitive with mined uranium when U/sub 3/O/sub 8/ cost is about 100 $/lb., adding less than 25% to present day cost of power from LWR's. Of the three blanket types considered, uranium fast fission (UFF), thorium fast fission (ThFF), and thorium fission supressed (ThFS), the ThFS blanket has a modest economic advantage under most conditions but has higher support ratios and potential safety advantages under all conditions.

  6. Mirror: Visually reflecting C{sup ++}

    SciTech Connect (OSTI)

    Orosco, R.; Campo, M.; Sole, J.P.

    1995-12-31

    Reflection is the ability of a system to inspect and change a model of itself. This ability allows to transparently control and extend the functionality of an existing system without performing any changes to the system itself. In dynamic object-oriented languages like CLOS or Smalltalk. the reflective ability is supported directly by the language. In C++, in contrast, reflection must be provided by some form of code annotation and pre-processing. In most cases, this approach either requires modification of the system code, or just supports the reflection of entire classes but not the reflection of determined objects. This work presents the Mirror environment that supports C++ reflective programming through visual association of meta-classes to classes. It allows full transparent reflection of objects using three-dimensional presentations of the different architecture levels. The environment adds reflective ability to C++ classes without any code modification visible to the user, as well as dynamically selective reflection of objects.

  7. Variational approach for static mirror structures

    SciTech Connect (OSTI)

    Kuznetsov, E. A.; Passot, T.; Sulem, P. L.; Ruban, V. P.

    2015-04-15

    Anisotropic static plasma equilibria where the parallel and perpendicular pressures are only functions of the amplitude of the local magnetic field are shown to be amenable to a variational principle with a free energy density given by the parallel tension. This approach is used to demonstrate that two-dimensional small-amplitude static magnetic holes constructed from a Grad-Shafranov type equation slightly below the (subcritical) mirror instability threshold identify with lump solitons of KPII equation, but turn out to be unstable. Differently, large-amplitude magnetic structures, which are stable as they realize a minimum of the free energy, are computed using a gradient method within two-dimensional numerical simulations where the regularizing effect of finite Larmor radius corrections is retained. Interestingly, these structures transform from stripes to bubbles when the angle of the magnetic field with the coordinate plane is increased.

  8. Compact Reflective Imaging Spectrometer Design Utilizing An Immersed Grating And Anamorphic Mirror

    DOE Patents [OSTI]

    Lerner, Scott A.

    2006-01-10

    A compact imaging spectrometer comprising an entrance slit, an anamorphic mirror, a grating, and a detector array. The entrance slit directs light to the anamorphic mirror. The anamorphic mirror receives the light and directs the light to the grating. The grating receives the light from the anamorphic mirror and defracts the light back onto the anamorphic mirror. The anamorphic mirror focuses the light onto a detector array.

  9. Photo-controllable thermoelectric properties with reversibility and photo-thermoelectric effects of tungsten trioxide accompanied by its photochromic phenomenon

    SciTech Connect (OSTI)

    Azuma, Chiori; Kawano, Takuto; Kakemoto, Hirofumi; Irie, Hiroshi

    2014-11-07

    The addition of photo-controllable properties to tungsten trioxide (WO{sub 3}) is of interest for developing practical applications of WO{sub 3} as well as for interpreting such phenomena from scientific viewpoints. Here, a sputtered crystalline WO{sub 3} thin film generated thermoelectric power due to ultraviolet (UV) light-induced band-gap excitation and was accompanied by a photochromic reaction resulting from generating W{sup 5+} ions. The thermoelectric properties (electrical conductivity (?) and Seebeck coefficient (S)) and coloration of WO{sub 3} could be reversibly switched by alternating the external stimulus between UV light irradiation and dark storage. After irradiating the film with UV light, ? increased, whereas the absolute value of S decreased, and the photochromic (coloration) reaction was detected. Notably, the opposite behavior was exhibited by WO{sub 3} after dark storage, and this reversible cycle could be repeated at least three times. Moreover, photo-thermoelectric effects (photo-conductive effect (photo-conductivity, ?{sub photo}) and photo-Seebeck effect (photo-Seebeck coefficient, S{sub photo})) were also detected in response to visible-light irradiation of the colored WO{sub 3} thin films. Under visible-light irradiation, ?{sub photo} and the absolute value of S{sub photo} increased and decreased, respectively. These effects are likely attributable to the excitation of electrons from the mid-gap visible light absorption band (W{sup 5+} state) to the conduction band of WO{sub 3}. Our findings demonstrate that the simultaneous, reversible switching of multiple properties of WO{sub 3} thin film is achieved by the application of an external stimulus and that this material exhibits photo-thermoelectric effects when irradiated with visible-light.

  10. U and Pu Gamma-Ray Measurements of Spent Fuel Using a Gamma-Ray Mirror Band-Pass Filter

    SciTech Connect (OSTI)

    Ziock, Klaus-Peter; Alameda, J.B.; Brejnholt, N.F.; Decker, T.A.; Descalle, M.A.; Fernandez-Perea, M.; Hill, R.M.; Kisner, R.A.; Melin, A.M.; Patton, B.W.; Ruz, J.; Soufli, R.; Pivovaroff, M.J.

    2014-01-01

    Abstract. We report on the use of grazing incidence gamma-ray mirrors to serve as a narrow band-pass filter for advanced non-destructive analysis (NDA) of spent nuclear fuel. The purpose of the mirrors is to limit the radiation reaching a HPGe detector to narrow spectral bands around characteristic emission lines from fissile isotopes in the fuel. This overcomes the normal rate issues when performing gamma-ray NDA measurements. In a proof-of-concept experiment, a set of simple flat gamma-ray mirrors were used to directly observe the atomic florescence lines from U and Pu from spent fuel pins with the detector located in a shirt-sleeve environment. The mirrors, consisting of highly polished silicon substrates deposited with WC/SiC multilayer coatings, successfully deflected the lines of interest while the intense primary radiation beam from the fuel was blocked by a lead beam stop. The gamma-ray multilayer coatings that make the mirrors work at the gamma-ray energies used here (~ 100 keV) have been experimentally tested at energies as high as 645 keV, indicating that direct observation of nuclear emission lines from 239Pu should be possible with an appropriately designed optic and shielding configuration.

  11. Enhanced loss of magnetic-mirror-trapped fast electrons by a shear Alfvén wave

    SciTech Connect (OSTI)

    Wang, Y.; Gekelman, W.; Pribyl, P.; Papadopoulos, K.

    2014-05-15

    Laboratory observations of enhanced loss of magnetic mirror trapped fast electrons irradiated by a shear Alfvén Wave (SAW) are reported. The experiment is performed in the quiescent after-glow plasma in the Large Plasma Device [Gekelman et al., Rev. Sci. Instrum. 62(12), 2875–2883 (1991)]. A trapped energetic electron population (>100 keV) is generated in a magnetic mirror section (mirror ratio ≈ 2, length = 3.5 m) by an X-mode high power microwave pulse, and forms a hot electron ring due to the grad-B and curvature drift. SAWs of arbitrary polarization are launched externally by a Rotating Magnetic Field source (δB/B{sub 0} ≈ 0.1%, λ{sub ∥} ≈ 9 m). Irradiated by a right-handed circularly polarized SAW, the loss of electrons, in both the radial and the axial direction of the mirror field, is significantly enhanced and is modulated at f{sub Alfvén}. The periodical loss continues even after the termination of the SAW. Experimental observations suggest that a spatial distortion of the ring is formed in the SAW field and creates a collective mode of the hot electron population that degrades its confinement and leads to electron loss from the magnetic mirror. The results could have implications on techniques of radiation belt remediation.

  12. Excitons in a mirror: Formation of “optical bilayers” using MoS{sub 2} monolayers on gold substrates

    SciTech Connect (OSTI)

    Mertens, Jan; Baumberg, Jeremy J.; Shi, Yumeng; Yang, Hui Ying; Molina-Sánchez, Alejandro; Wirtz, Ludger

    2014-05-12

    We report coupling of excitons in monolayers of molybdenum disulphide to their mirror image in an underlying gold substrate. Excitons at the direct band gap are little affected by the substrate whereas strongly bound C-excitons associated with a van-Hove singularity change drastically. On quartz substrates only one C-exciton is visible (in the blue) but on gold substrates a strong red-shifted extra resonance in the green is seen. Exciton coupling to its image leads to formation of a “mirror biexciton” with enhanced binding energy. Estimates of this energy shift in an emitter-gold system match experiments well. The absorption spectrum of MoS{sub 2} on gold thus resembles a bilayer of MoS{sub 2} which has been created by optical coupling. Additional top-mirrors produce an “optical bulk.”.

  13. Photo-Spectrometer Realized In A Standard Cmos Ic Process

    DOE Patents [OSTI]

    Simpson, Michael L.; Ericson, M. Nance; Dress, William B.; Jellison, Gerald E.; Sitter, Jr., David N.; Wintenberg, Alan L.

    1999-10-12

    A spectrometer, comprises: a semiconductor having a silicon substrate, the substrate having integrally formed thereon a plurality of layers forming photo diodes, each of the photo diodes having an independent spectral response to an input spectra within a spectral range of the semiconductor and each of the photo diodes formed only from at least one of the plurality of layers of the semiconductor above the substrate; and, a signal processing circuit for modifying signals from the photo diodes with respective weights, the weighted signals being representative of a specific spectral response. The photo diodes have different junction depths and different polycrystalline silicon and oxide coverings. The signal processing circuit applies the respective weights and sums the weighted signals. In a corresponding method, a spectrometer is manufactured by manipulating only the standard masks, materials and fabrication steps of standard semiconductor processing, and integrating the spectrometer with a signal processing circuit.

  14. Some ideas on the choice of designs and materials for cooled mirrors

    SciTech Connect (OSTI)

    Howells, M.R.

    1995-02-01

    Here the author expresses some of his views on how the fabrication of future synchrotron beam-line optics ought to be approached. Many of the most interesting new ideas for beam-line mirrors, especially those with a promise of low costs, involve metals. Historically these materials had posed certain problems, but these have been overcome in recent times to the extent that the initial complement of Advanced-Light-Source (ALS) beam-line optics were made of metal and have met their specifications. To go furthere along that road one needs to get more interested in the metallurgical issues involved in making high-quality metal mirrors. The author recounts the results of some investigations into these materials questions and trys to draw on some of the experiences and achievements of these communities which have hitherto had only limited contact with synchrotron radiation researchers.

  15. 1944 aerial photo of Y-12 under construction | Y-12 National Security

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

    Complex 1944 aerial photo of Y-12 ... 1944 aerial photo of Y-12 under construction A 1944 aerial photo showing various building under construction at Y-12.

  16. Developmental long trace profiler using optimally aligned mirror based pentaprism

    SciTech Connect (OSTI)

    Barber, Samuel K; Morrison, Gregory Y; Yashchuk, Valeriy V; Gubarev, Mikhail V; Geckeler, Ralf D.; Buchheim, Jana; Siewert, Frank; Zeschke, Thomas

    2010-12-20

    A low-budget surface slope measuring instrument, the Developmental Long Trace Profiler (DLTP), was recently brought into operation at the Advanced Light Source Optical Metrology Laboratory. The instrument is based on a precisely calibrated autocollimator and a movable pentaprism. The capability of the DLTP to achieve sub-microradian surface slope metrology has been verified via cross-comparison measurements with other high-performance slope measuring instruments when measuring the same high-quality test optics. In the present work, a further improvement of the DLTP is achieved by replacing the existing bulk pentaprism with a specially designed mirror based pentaprism. A mirror based pentaprism offers the possibility to eliminate systematic errors introduced by inhomogeneity of the optical material and fabrication imperfections of a bulk pentaprism. We provide the details of the mirror based pentaprism design and describe an original experimental procedure for precision mutual alignment of the mirrors. The algorithm of the alignment procedure and its efficiency are verified with rigorous ray tracing simulations. Results of measurements of a spherically curved test mirror and a flat test mirror using the original bulk pentaprism are compared with measurements using the new mirror based pentaprism, demonstrating the improved performance.

  17. Photos of AEC Site Under Construction | U.S. DOE Office of Science...

    Office of Science (SC) Website

    Photos of AEC Site Under Construction Basic Energy Sciences (BES) BES Home About ... Germantown Natural History Photos of AEC Site Under Construction Print Text Size: A A A ...

  18. Photo of the Week: Power Up! Twenty Steps to Zip a Zipper | Department...

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

    View more photos from the competition here. | Photo courtesy of Argonne National Laboratory. Sarah Gerrity Sarah Gerrity Former Multimedia Editor, Office of Public Affairs Every ...

  19. Wave-particle Interactions In Rotating Mirrors

    SciTech Connect (OSTI)

    Abraham J. Fetterman and Nathaniel J. Fisch

    2011-01-11

    Wave-particle interactions in EB rotating plasmas feature an unusual effect: particles are diffused by waves in both potential energy and kinetic energy. This wave-particle interaction generalizes the alpha channeling effect, in which radio frequency waves are used to remove alpha particles collisionlessly at low energy. In rotating plasmas, the alpha particles may be removed at low energy through the loss cone, and the energy lost may be transferred to the radial electric field. This eliminates the need for electrodes in the mirror throat, which have presented serious technical issues in past rotating plasma devices. A particularly simple way to achieve this effect is to use a high azimuthal mode number perturbation on the magnetic field. Rotation can also be sustained by waves in plasmas without a kinetic energy source. This type of wave has been considered for plasma centrifuges used for isotope separation. Energy may also be transferred from the electric field to particles or waves, which may be useful for ion heating and energy generation.

  20. DOE - NNSA/NFO -- Photo Library Wild Flowers

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

    Wild Flowers NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - Wild Flowers Wild flowers such as Cane Spring suncup and White bearpoppy are included among the 750 varieties of plants located on the Nevada National Security Site. Instructions: Click the photograph THUMBNAIL to view the photograph details Thumbnail Category http://www.nv.doe.gov/library/photos/thumbs/CaneSpringsuncup.jpg Wild Flowers http://www.nv.doe.gov/library/photos/thumbs/Clokeys.jpg Wild Flowers

  1. Photo of the Week: July 13, 2012 | Department of Energy

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

    13, 2012 Photo of the Week: July 13, 2012 July 13, 2012 - 5:44pm Addthis Department of Energy Secretary Steven Chu visited Ingeteam, based in Milwaukee, Wisconsin, on Thursday, July 12. During the visit, he toured the facilities that produce wind power generators and converters, in addition to PV solar inverters. In this photo he looks at a Stator 2MW Wind Turbine Generator. | Photo by Pat A. Robinson Department of Energy Secretary Steven Chu visited Ingeteam, based in Milwaukee, Wisconsin, on

  2. Application of silicon carbide to synchrotron-radiation mirrors

    SciTech Connect (OSTI)

    Takacs, P.Z.; Hursman, T.L.; Williams, J.T.

    1983-09-01

    Damage to conventional mirror materials exposed to the harsh synchrotron radiation (SR) environment has prompted the SR user community to search for more suitable materials. Next-generation insertion devices, with their attendant flux increases, will make the problem of mirror design even more difficult. A parallel effort in searching for better materials has been underway within the laser community for several years. The technology for dealing with high thermal loads is highly developed among laser manufacturers. Performance requirements for laser heat exchangers are remarkably similar to SR mirror requirements. We report on the application of laser heat exchanger technology to the solution of typical SR mirror design problems. The superior performance of silicon carbide for laser applications is illustrated by various material trades studies, and its superior performance for SR applications is illustrated by means of model calculations.

  3. Bidirectional reflectivity of mirrors in solar power plants

    SciTech Connect (OSTI)

    Khrustalyov, B.A.; Ragimov, R.K.

    1991-01-01

    In this paper a technique for measuring the bidirectional reflectivity of mirrors is presented. An experimental setup is described which allows one to measure the reflecting characteristics at small angles of scattering. These reflectivities are approximated by an exponential relation.

  4. Mechanical Design of the HER Synchrotron Light Monitor Primary Mirror

    SciTech Connect (OSTI)

    Daly, Edward F.; Fisher, Alan S.; Kurita, Nadine R.; Langton, J.; /SLAC

    2011-09-14

    This paper describes the mechanical design of the primary mirror that images the visible portion of the synchrotron radiation (SR) extracted from the High Energy Ring (HER) of the PEP-II B-Factory. During off-axis operation, the water-cooled GlidCop mirror is subjected to a heat flux in excess of 2000 W/cm2. When on-axis imaging occurs, the heat flux due to scattered SR, resistive wall losses and Higher-Order-Mode (HOM) heating is estimated at 1 W/cm2. The imaging surface is plated with Electroless Nickel to improve its optical characteristics. The design requirements for the primary mirror are listed and discussed. Calculated mechanical distortions and stresses experienced by the mirror during on-axis and off-axis operation will be presented.

  5. Lightweight diaphragm mirror module system for solar collectors

    DOE Patents [OSTI]

    Butler, B.L.

    1984-01-01

    A mirror module system is provided for accurately focusing solar radiation on a point or a line as defined by an array of solar collectors. Each mirror module includes a flexible membrane stretched over a frame in a manner similar to that of a drum or a trampoline and further includes a silvered glass or plastic mirror for forming an optical reflecting surface. The configuration of the optical reflecting surface is variably adjustable to provide for the accurate focusing of the solar energy on a given collector array, e.g., a point or a linear array arrangement. The flexible mirror-membrane combination is lightweight to facilitate installation and reduce system cost yet structurally strong enough to provide for the precise focusing of the incident solar radiation in a semi-rigid reflector system in which unwanted reflector displacement is minimized.

  6. Lightweight diaphragm mirror module system for solar collectors

    DOE Patents [OSTI]

    Butler, Barry L.

    1985-01-01

    A mirror module system is provided for accurately focusing solar radiation on a point or a line as defined by an array of solar collectors. Each mirror module includes a flexible membrane stretched over a frame in a manner similar to that of a drum or a trampoline and further includes a silvered glass or plastic mirror for forming an optical reflecting surface. The configuration of the optical reflecting surface is variably adjustable to provide for the accurate focusing of the solar energy on a given collector array, e.g., a point or a linear array arrangement. The flexible mirror-membrane combination is lightweight to facilitate installation and reduce system cost yet structurally strong enough to provide for the precise focusing of the incident solar radiation in a semi-rigid reflector system in which unwanted reflector displacement is minimized.

  7. Durable Corrosion and Ultraviolet-Resistant Silver Mirror

    DOE Patents [OSTI]

    Jorgensen, G. J.; Gee, R.

    2006-01-24

    A corrosion and ultra violet-resistant silver mirror for use in solar reflectors; the silver layer having a film-forming protective polymer bonded thereto, and a protective shield overlay comprising a transparent multipolymer film that incorporates a UV absorber. The corrosion and ultraviolet resistant silver mirror retains spectral hemispherical reflectance and high optical clarity throughout the UV and visible spectrum when used in solar reflectors.

  8. Rapid Solar Mirror Characterization with Fringe Reflection Techniques -

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

    Energy Innovation Portal Thermal Solar Thermal Energy Analysis Energy Analysis Find More Like This Return to Search Rapid Solar Mirror Characterization with Fringe Reflection Techniques SOFAST: Sandia Optical Fringe Analysis Slope Tool Sandia National Laboratories Contact SNL About This Technology Publications: PDF Document Publication Market Sheet (834 KB) SOFAST Imaging SOFAST Imaging Technology Marketing SummaryThis technology is an automated system in which the reflection of a mirror,

  9. Ion laser isotope enrichment by photo-predissociation of formaldehyde

    DOE Patents [OSTI]

    Marling, John B.

    1977-06-17

    Enrichment of carbon, hydrogen and/or oxygen isotopes by means of isotopically selective photo-predissociation of formaldehyde is achieved by irradiation with a fixed frequency ion laser, specifically, a neon, cadmium, or xenon ion laser.

  10. NREL: Sustainable NREL - Research Support Facility Photos (Text...

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

    Credit: Pat Corkery Photo of an office building with two large wings on either side of a courtyard entryway and a tiled roadway in the foreground. The 222,000 sq. ft. RSF achieved ...

  11. Photo of the Week: Rocky Flats Wildlife Refuge | Department of...

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

    Sarah Gerrity Sarah Gerrity Former Multimedia Editor, Office of Public Affairs Every week, we'll feature our favorite energy-related photo here on Energy.gov, at Facebook.com...

  12. Photo of the Week: Studying the Rhizosphere | Department of Energy

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

    Sarah Gerrity Sarah Gerrity Former Multimedia Editor, Office of Public Affairs Every week, we'll feature our favorite energy-related photo here on Energy.gov, at Facebook.com...

  13. Photo of the Week: Pi + NASA + Supercomputing | Department of...

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

    Happy Pi Day Today, NASA released this awesome photo of a NASA-themed pie with NASA's Pleiades supercomputer at Moffett Field, near Mountain View, California. Fun fact: in 2011, ...

  14. Photo of the Week: Women in STEM -- Elaine Zworykin | Department...

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

    ... In this photo, Yaniel Ramirez from Colegio Catolico Notre Dame in Caguas, Puerto Rico launches his team's electric car down the test track.

  15. DOE - NNSA/NFO -- Photo Library EM Waste Management

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

    U.S. DOENNSA - Nevada Field Office Photo Library - Waste Management Foreseeing the need for environmental management at the Nevada Test Site, the U.S. Department of Energy Nevada ...

  16. DOE - NNSA/NFO -- Photo Library Big Hole Drilling

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

    Big Hole Drilling NNSANFO Language Options U.S. DOENNSA - Nevada Field Office Photo Library - Big Hole Drilling The need to drill large-diameter holes at the Nevada National ...

  17. DOE - NNSA/NFO -- Photo Library - Test Preparation

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

    Test Preparation NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - Test Preparation Photos in this category depict preparations for past nuclear tests. The last test at the Nevada National Security Site was conducted in 1992, the year President Bush instituted a moratorium. Since that time, the United States has ceased all nuclear testing. Instructions: Click the photograph THUMBNAIL to view the photograph details Click the Category, Number, or Date table header links

  18. Low-Temperature Geothermal Photo Library | Department of Energy

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

    Low-Temperature Geothermal Photo Library Low-Temperature Geothermal Photo Library Addthis America&#039;s First Geothermally Heated Campus adds 3.5 MW of Clean, Domestic Electricity Generation 1 of 2 America's First Geothermally Heated Campus adds 3.5 MW of Clean, Domestic Electricity Generation With Energy Department support, the Klamath Falls campus will utilize 1.5 megawatts (MW) of newly installed geothermal capacity combined with a 2 MW solar array, making OIT the first university in

  19. Geothermal EGS Demonstration Photo Library | Department of Energy

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

    Geothermal EGS Demonstration Photo Library Geothermal EGS Demonstration Photo Library Addthis Energy Department EGS Demonstration Yields First Commercial Power to the Grid 1 of 4 Energy Department EGS Demonstration Yields First Commercial Power to the Grid In April 2013, DOE industry partner Ormat Technologies succeeded in generating the nation's first commercial power from enhanced geothermal systems to the grid at Desert Peak, Nevada. Image: courtesy Ormat Technologies AltaRock

  20. Dominick%20Three%20Generations%20Photo.JPG | OSTI, US Dept of Energy Office

    Office of Scientific and Technical Information (OSTI)

    of Scientific and Technical Information Dominick%20Three%20Generations%20Photo.JPG

  1. U.S. Wind Energy Manufacturing & Supply Chain Cover Photo | Department of

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

    Energy Wind Energy Manufacturing & Supply Chain Cover Photo U.S. Wind Energy Manufacturing & Supply Chain Cover Photo GLWN Cover Photo.JPG (67.35 KB) More Documents & Publications U.S. Wind Energy Manufacturing & Supply Chain: A Competitiveness Analysis 2014 Offshore Wind Market & Economic Analysis Cover Photo Testing, Manufacturing, and Component Development Projects

  2. Long-Working-Distance Kirkpatrick-Baez Mirrors for Hard X-ray Beamlines at SPring-8

    SciTech Connect (OSTI)

    Yumoto, H.; Koyama, T.

    2011-09-09

    We designed and installed two types of long-working-distance Kirkpatrick-Baez (KB) mirrors and mirror manipulators, which were customized into each experiment for hard x-ray undulator beamlines at SPring-8. For the BL32XU RIKEN Targeted Proteins beamline, 400-mm-long KB focusing mirrors for a beam size of 1 {mu}m with a 730-mm-long working distance were designed for carrying out the structural analysis of protein microcrystals. We realized a focusing beam size of 0.9x0.9 {mu}m{sup 2}(FWHM) and a focusing intensity of 6x10{sup 10} (photons/s) at an x-ray energy of 12.4 keV. For the BL19LXU RIKEN SR Physics beamline, we developed KB mirrors for 100-nm focusing with a 100-mm-working distance for the purpose of nano-focus x-ray diffraction. A focusing beam size of 100x100 nm{sup 2}(FWHM) and a high focusing intensity of 3.7x10{sup 10} (photons/s) at an x-ray energy of 12.4 keV were realized.

  3. Synthetic muscle experiment will likely return to Earth in March |

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

    Princeton Plasma Physics Lab Synthetic muscle experiment will likely return to Earth in March By Jeanne Jackson DeVoe October 26, 2015 Tweet Widget Google Plus One Share on Facebook A photo taken by Astronaut Scott Kelly of a sample of the synthetic muscle experiment floating in the International Space Station. (Photo by Scott Kelly, Courtesy of NASA ) A photo taken by Astronaut Scott Kelly of a sample of the synthetic muscle experiment floating in the International Space Station. Gallery: A

  4. Photo-induced conductance fluctuations in mesoscopic Ge/Si systems with quantum dots

    SciTech Connect (OSTI)

    Stepina, N. P.; Dvurechenskii, A. V.; Nikiforov, A. I.; Moers, J.; Gruetzmacher, D.

    2014-08-20

    We study the evolution of electron transport in strongly localized mesoscopic system with quantum dots under small photon flux. Exploring devices with narrow transport channels lead to the observation of giant fluctuations of the photoconductance, which is attributed to the strong dependence of hopping current on the filling of dots by holes. In our experiments, single-photon mode operation is indicated by the linear dependence of the frequency of photo-induced fluctuations on the light intensity and the step-like response of conductance on the pulse excitation. The effect of the light wavelength, measurement temperature, size of the conductive channel on the device efficiency are considered.

  5. Photo of the Week: Inside the Super HILAC | Department of Energy

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

    Super HILAC Photo of the Week: Inside the Super HILAC August 29, 2013 - 2:55pm Addthis Super HILAC (Super Heavy Ion Linear Accelerator) was one of the first particle accelerators that could accelerate heavier elements to “atom-smashing” speeds. The device was built in 1972 and played a significant role in four decades of scientific research at Lawrence Berkeley National Laboratory. In addition to being the launchpad for a variety of major experiments, the Super HILAC was crucial in the

  6. Photo of the Week: The Brookhaven Graphite Research Reactor | Department of

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

    Energy The Brookhaven Graphite Research Reactor Photo of the Week: The Brookhaven Graphite Research Reactor May 30, 2014 - 1:12pm Addthis The Brookhaven Graphite Research Reactor (BGRR) was the first reactor built in the U.S. for peacetime atomic research following World War II. Over 18 years, an estimated 25,000 scientific experiments were carried out using the neutrons produced in the facility's 700-ton graphite core. In addition to advancing the understanding of atomic nuclei and the

  7. Method for providing mirror surfaces with protective strippable polymeric film

    DOE Patents [OSTI]

    Edwards, Charlene C.; Day, Jack R.

    1980-01-01

    This invention is a method for forming a protective, strippable, elastomeric film on a highly reflective surface. The method is especially well suited for protecting diamond-machined metallic mirrors, which are susceptible not only to abrasion and mechanical damage but also to contamination and corrosion by various fluids. In a typical use of the invention, a diamond-machined copper mirror surface is coated uniformly with a solution comprising a completely polymerized and completely cured thermoplastic urethane elastomer dissolved in tetrahydrofuran. The applied coating is evaporated to dryness, forming a tough, adherent, impermeable, and transparent film which encapsulates dust and other particulates on the surface. The film may be left in place for many months. When desired, the film may be stripped intact, removing the entrapped particulates and leaving no residue on the mirror surface.

  8. IR Spectrometer Using 90-degree Off-axis Parabolic Mirrors

    SciTech Connect (OSTI)

    Robert M. Malone, Richard, G. Hacking, Ian J. McKenna, and Daniel H. Dolan

    2008-09-02

    A gated spectrometer has been designed for real-time, pulsed infrared (IR) studies at the National Synchrotron Light ource at the Brookhaven National Laboratory. A pair of 90-degree, off-axis parabolic mirrors are used to relay the light from an entrance slit to an output IR recording camera. With an initial wavelength range of 15004500 nm required, gratings could not be used in the spectrometer because grating orders would overlap. A magnesium oxide prism, placed between these parabolic mirrors, serves as the dispersion element. The spectrometer is doubly telecentric. With proper choice of the air spacing between the prism and the second parabolic mirror, any spectral region of interest within the InSb camera arrays sensitivity region can be recorded. The wavelengths leaving the second parabolic mirror are collimated, thereby relaxing the camera positioning tolerance. To set up the instrument, two different wavelength (visible) lasers are introduced at the entrance slit and made collinear with the optical axis via flip mirrors. After dispersion by the prism, these two laser beams are directed to tick marks located on the outside housing of the gated IR camera. This provides first-order wavelength calibration for the instrument. Light that is reflected off the front prism face is coupled into a high-speed detector to verify steady radiance during the gated spectral imaging. Alignment features include tick marks on the prism and parabolic mirrors. This instrument was designed to complement singlepoint pyrometry, which provides continuous time histories of a small collection of spots from shock-heated targets.

  9. Normal incidence x-ray mirror for chemical microanalysis

    DOE Patents [OSTI]

    Carr, M.J.; Romig, A.D. Jr.

    1987-08-05

    An x-ray mirror for both electron column instruments and micro x-ray fluorescence instruments for making chemical, microanalysis comprises a non-planar mirror having, for example, a spherical reflecting surface for x-rays comprised of a predetermined number of alternating layers of high atomic number material and low atomic number material contiguously formed on a substrate and whose layers have a thickness which is a multiple of the wavelength being reflected. For electron column instruments, the wavelengths of interest lie above 1.5nm, while for x-ray fluorescence instruments, the range of interest is below 0.2nm. 4 figs.

  10. Can mirror matter solve the the cosmological lithium problem?

    SciTech Connect (OSTI)

    Coc, Alain [Centre de Sciences Nuclaires et de Sciences de la Matire (CSNSM), CNRS/IN2P3, Universit Paris Sud 11, UMR 8609, Btiment 104, 91405 Orsay Campus (France); Uzan, Jean-Philippe; Vangioni, Elisabeth [Institut d'Astrophysique de Paris, UMR-7095 du CNRS, Universit Pierre et Marie Curie, 98 bis bd Arago, 75014 Paris, France and Sorbonne Universits, Institut Lagrange de Paris, 98 bis bd Arago, 75014 Paris (France)

    2014-05-02

    The abundance of lithium-7 confronts cosmology with a long lasting inconsistency between the predictions of standard Big Bang Nucleosynthesis with the baryonic density determined from the Cosmic Microwave Background observations on the one hand, and the spectroscopic determination of the lithium-7 abundance on the other hand. We investigated the influence of the existence of a mirror world, focusing on models in which mirror neutrons can oscillate into ordinary neutrons. Such a mechanism allows for an effective late time neutron injection, which induces an increase of the destruction of beryllium-7and thus a lower final lithium-7 abundance.

  11. Measurement and performance of stretched-membrane mirror facets

    SciTech Connect (OSTI)

    Davenport, R.L.; Oshmyansky, S.

    1995-11-01

    For several years, SAIC has been developing solar concentrators based on stretched-membrane mirrors. In an ongoing development and commercialization program known as the Utility-Scale Joint Venture Program (JVP), SAIC is now developing a commercial 25 kW{sub e} dish/Stirling system using a faceted stretched-membrane dish. This paper reports on physical and optical measurements of the stretched-membrane mirror facets produced for the JVP program, and the use of those measurements to predict and adjust the flux profile on the receiver of a dish/Stirling system in order to optimize its performance.

  12. Damage imaging in a laminated composite plate using an air-coupled time reversal mirror

    SciTech Connect (OSTI)

    Le Bas, P. -Y.; Remillieux, M. C.; Pieczonka, L.; Ten Cate, J. A.; Anderson, B. E.; Ulrich, T. J.

    2015-11-03

    We demonstrate the possibility of selectively imaging the features of a barely visible impact damage in a laminated composite plate by using an air-coupled time reversal mirror. The mirror consists of a number of piezoelectric transducers affixed to wedges of power law profiles, which act as unconventional matching layers. The transducers are enclosed in a hollow reverberant cavity with an opening to allow progressive emission of the ultrasonic wave field towards the composite plate. The principle of time reversal is used to focus elastic waves at each point of a scanning grid spanning the surface of the plate, thus allowing localized inspection at each of these points. The proposed device and signal processing removes the need to be in direct contact with the plate and reveals the same features as vibrothermography and more features than a C-scan. More importantly, this device can decouple the features of the defect according to their orientation, by selectively focusing vector components of motion into the object, through air. For instance, a delamination can be imaged in one experiment using out-of-plane focusing, whereas a crack can be imaged in a separate experiment using in-plane focusing. As a result, this capability, inherited from the principle of time reversal, cannot be found in conventional air-coupled transducers.

  13. Damage imaging in a laminated composite plate using an air-coupled time reversal mirror

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

    Le Bas, P. -Y.; Remillieux, M. C.; Pieczonka, L.; Ten Cate, J. A.; Anderson, B. E.; Ulrich, T. J.

    2015-11-03

    We demonstrate the possibility of selectively imaging the features of a barely visible impact damage in a laminated composite plate by using an air-coupled time reversal mirror. The mirror consists of a number of piezoelectric transducers affixed to wedges of power law profiles, which act as unconventional matching layers. The transducers are enclosed in a hollow reverberant cavity with an opening to allow progressive emission of the ultrasonic wave field towards the composite plate. The principle of time reversal is used to focus elastic waves at each point of a scanning grid spanning the surface of the plate, thus allowingmore » localized inspection at each of these points. The proposed device and signal processing removes the need to be in direct contact with the plate and reveals the same features as vibrothermography and more features than a C-scan. More importantly, this device can decouple the features of the defect according to their orientation, by selectively focusing vector components of motion into the object, through air. For instance, a delamination can be imaged in one experiment using out-of-plane focusing, whereas a crack can be imaged in a separate experiment using in-plane focusing. As a result, this capability, inherited from the principle of time reversal, cannot be found in conventional air-coupled transducers.« less

  14. Measurements Of Spin Observables In Pseudoscalar-Meson Photo-Production Using Polarized Neutrons In Solid HD

    SciTech Connect (OSTI)

    Kageya, Tsuneo

    2014-01-01

    Psuedo-scalar meson photo production measurements have been carried out with longitudinally-polarized neutrons using the circularly and linearly polarized photon beams and the CLAS at Thomas Jefferson National Accelerator Facility (Jlab). The experiment aims to obtain a complete set of spin observables on an efficient neutron target. Preliminary E asymmetries for the exclusive reaction, gamma + n(p)--> pi- + p(p), selecting quasi free neutron kinematics are discussed.

  15. Measurements of spin observables in pseudo-scalar meson photo-production using polarized neutrons in solid HD

    SciTech Connect (OSTI)

    Kageya, Tsuneo

    2014-01-01

    A measurement of psuedo-scalar meson photo production from longitudinally polarized solid HD has been carried out with the CLAS at Thomas Jefferson National Accelerator Facility (Jlab) with circularly and linearly polarized photon beams. Its aim is to measure a complete set of spin observables for the neutron simultaneously from the same experiment. As a polarized neutron, deutron in HD was used. Preliminary asymmetries are shown for the {pi}{sup -} channel.

  16. Photo Gallery: Renewable Energy in 2013 | Department of Energy

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

    Photo Gallery: Renewable Energy in 2013 Photo Gallery: Renewable Energy in 2013 December 31, 2013 - 2:07pm Addthis <strong>April 2013:</strong> The Energy Department recognizes the nation’s first commercial enhanced geothermal system (EGS) project to supply electricity to the grid. Based in Churchill County, Nevada, Ormat Technologies’ Desert Peak 2 EGS project has increased power output of its nearby operating geothermal field by nearly 38% – providing an additional

  17. Photo of the Week: August 10, 2012 | Department of Energy

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

    10, 2012 Photo of the Week: August 10, 2012 August 10, 2012 - 9:42am Addthis On Monday, August 6, 2012, NASA's Curiosity rover arrived on the surface of Mars to gather geological and environmental data to determine if the planet has ever had the potential to support life. This photo was taken by a navigation camera located toward the back-left of the Curiosity rover, and features part of the rover's nuclear <a href="/node/381709" target="_blank">power supply</a>.

  18. Photo of the Week: August 3, 2012 | Department of Energy

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

    3, 2012 Photo of the Week: August 3, 2012 August 3, 2012 - 12:40pm Addthis A worker suppresses dust during the final demolition stages of the historic DP West site, located at Los Alamos National Laboratory’s (LANL) Technical Area 21. The demolition was funded by the American Recovery and Reinvestment Act (ARRA) and is part of $212 million in ARRA funds the Lab received for environmental remediation. | Photo courtesy of Los Alamos National Laboratory. A worker suppresses dust during the

  19. Photo of the Week: Fan-tastic | Department of Energy

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

    Fan-tastic Photo of the Week: Fan-tastic August 17, 2012 - 10:30am Addthis In Jonesboro, Arkansas, a Nordex USA employee stands between utility-scale components that will eventually make up a completed wind turbine. Under the Recovery Act, Nordex USA received a tax credit to assist in the creation of the Jonesboro manufacturing facility, which opened in October 2010. | Photo courtesy of Nordex USA. In Jonesboro, Arkansas, a Nordex USA employee stands between utility-scale components that will

  20. Lithium niobate single-crystal and photo-functional device

    DOE Patents [OSTI]

    Gopalan, Venkatraman; Mitchell, Terrence E.; Kitamura, Kenji; Furukawa, Yasunori

    2001-01-01

    Provided are lithium niobate single-crystal that requires a low voltage of not larger than 10 kV/nm for its ferroelectric polarization inversion and of which the polarization can be periodically inverted with accuracy even at such a low voltage, and a photo-functional device comprising the crystal. The crystal has a molar fraction of Li.sub.2 O/(Nb.sub.2 O.sub.5 +Li.sub.2 O) of falling between 0.49 and 0.52. The photo-functional device can convert a laser ray being incident thereon.

  1. Performance optimization of a bendable parabolic cylinder collimating X-ray mirror for the ALS micro-XAS beamline 10.3.2

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

    Yashchuk, Valeriy V.; Morrison, Gregory Y.; Marcus, Matthew A.; Domning, Edward E.; Merthe, Daniel J.; Salmassi, Farhad; Smith, Brian V.

    2015-04-08

    The Advanced Light Source (ALS) beamline (BL) 10.3.2 is an apparatus for X-ray microprobe spectroscopy and diffraction experiments, operating in the energy range 2.4–17 keV. The performance of the beamline, namely the spatial and energy resolutions of the measurements, depends significantly on the collimation quality of light incident on the monochromator. In the BL 10.3.2 end-station, the synchrotron source is imaged 1:1 onto a set of roll slits which form a virtual source. The light from this source is collimated in the vertical direction by a bendable parabolic cylinder mirror. Details are presented of the mirror design, which allows formore » precision assembly, alignment and shaping of the mirror, as well as for extending of the mirror operating lifetime by a factor of ~10. Assembly, mirror optimal shaping and preliminary alignment were performed ex situ in the ALS X-ray Optics Laboratory (XROL). Using an original method for optimal ex situ characterization and setting of bendable X-ray optics developed at the XROL, a root-mean-square (RMS) residual surface slope error of 0.31 µrad with respect to the desired parabola, and an RMS residual height error of less than 3 nm were achieved. Once in place at the beamline, deviations from the designed optical geometry (e.g. due to the tolerances for setting the distance to the virtual source, the grazing incidence angle, the transverse position) and/or mirror shape (e.g. due to a heat load deformation) may appear. Due to the errors, on installation the energy spread from the monochromator is typically a few electron-volts. Here, a new technique developed and successfully implemented for at-wavelength (in situ) fine optimal tuning of the mirror, enabling us to reduce the collimation-induced energy spread to ~0.05 eV, is described.« less

  2. 2014 SunShot Grand Challenge Summit Day Two Photos | Department of Energy

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

    Day Two Photos 2014 SunShot Grand Challenge Summit Day Two Photos Addthis Day 2 Subprogram Overviews 9 1 of 39 Day 2 Subprogram Overviews 9 Photo Credit: SunShot Date taken: 2014-05-20 14:41 Day 2 Subprogram Overviews 8 2 of 39 Day 2 Subprogram Overviews 8 Photo Credit: SunShot Date taken: 2014-05-20 14:37 Day 2 Subprogram Overviews 7 3 of 39 Day 2 Subprogram Overviews 7 Photo Credit: SunShot Date taken: 2014-05-20 14:36 Day 2 Subprogram Overviews 6 4 of 39 Day 2 Subprogram Overviews 6 Photo

  3. Quark and lepton mixing as manifestations of violated mirror symmetry

    SciTech Connect (OSTI)

    Dyatlov, I. T.

    2015-06-15

    The existence of heavy mirror analogs of ordinary fermions would provide deeper insight into the gedanken paradox appearing in the Standard Model upon direct parity violation and consisting in a physical distinguishability of left- and right-hand coordinate frames. Arguments are presented in support of the statement that such mirror states may also be involved in the formation of observed properties of the system of Standard Model quarks and leptons—that is, their mass spectra and their weak-mixing matrices: (i) In the case of the involvement of mirror generations, the quark mixing matrix assumes the experimentally observed form. It is determined by the constraints imposed by weak SU(2) symmetry and by the quark-mass hierarchy. (ii) Under the same conditions and upon the involvement of mirror particles, the lepton mixing matrix (neutrino mixing) may become drastically different from its quark analog—the Cabibbo-Kobayashi-Maskawa matrix; that is, it may acquire properties suggested by experimental data. This character of mixing is also indicative of an inverse mass spectrum of Standard Model neutrinos and their Dirac (not Majorana) nature.

  4. Mirror Film Company Has 'Concentrated' Plans for Expansion

    Office of Energy Efficiency and Renewable Energy (EERE)

    ReflecTech Inc. is using a silvered polymer-based film -- instead of glass -- to make mirror panels for focusing sunlight onto a heat generator. Their innovation helped them land a Recovery Act tax credit to expand their Colorado company.

  5. Rhodium coated mirrors deposited by magnetron sputtering for fusion applications

    SciTech Connect (OSTI)

    Marot, L.; De Temmerman, G.; Oelhafen, P.; Covarel, G.; Litnovsky, A.

    2007-10-15

    Metallic mirrors will be essential components of all optical spectroscopy and imaging systems for ITER plasma diagnostics. Any change in the mirror performance, in particular, its reflectivity, due to erosion of the surface by charge exchange neutrals or deposition of impurities will influence the quality and reliability of the detected signals. Due to its high reflectivity in the visible wavelength range and its low sputtering yield, rhodium appears as an attractive material for first mirrors in ITER. However, the very high price of the raw material calls for using it in the form of a film deposited onto metallic substrates. The development of a reliable technique for the preparation of high reflectivity rhodium films is therefore of the highest importance. Rhodium layers with thicknesses of up to 2 {mu}m were produced on different substrates of interest (Mo, stainless steel, Cu) by magnetron sputtering. Produced films exhibit a low roughness and crystallite size of about 10 nm with a dense columnar structure. No impurities were detected on the surface after deposition. Scratch tests demonstrate that adhesion properties increase with substrate hardness. Detailed optical characterizations of Rh-coated mirrors as well as results of erosion tests performed both under laboratory conditions and in the TEXTOR tokamak are presented in this paper.

  6. Normal incidence X-ray mirror for chemical microanalysis

    DOE Patents [OSTI]

    Carr, Martin J.; Romig, Jr., Alton D.

    1990-01-01

    A non-planar, focusing mirror, to be utilized in both electron column instruments and micro-x-ray fluorescence instruments for performing chemical microanalysis on a sample, comprises a concave, generally spherical base substrate and a predetermined number of alternating layers of high atomic number material and low atomic number material contiguously formed on the base substrate. The thickness of each layer is an integral multiple of the wavelength being reflected and may vary non-uniformly according to a predetermined design. The chemical analytical instruments in which the mirror is used also include a predetermined energy source for directing energy onto the sample and a detector for receiving and detecting the x-rays emitted from the sample; the non-planar mirror is located between the sample and detector and collects the x-rays emitted from the sample at a large solid angle and focuses the collected x-rays to the sample. For electron column instruments, the wavelengths of interest lie above 1.5 nm, while for x-ray fluorescence instruments, the range of interest is below 0.2 nm. Also, x-ray fluorescence instruments include an additional non-planar focusing mirror, formed in the same manner as the previously described m The invention described herein was made in the performance of work under contract with the Department of Energy, Contract No. DE-AC04-76DP00789, and the United States Government has rights in the invention pursuant to this contract.

  7. PPPL engineers build mirror mechanism using 3D printer and off...

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

    mirror, connected in such a way that no matter how the bars move the mirrors always stay in the same alignment with one another. Each bar is about a foot long and is made of...

  8. Borehole Imaging of In Situ Stress Tests at Mirror Lake Research...

    Open Energy Info (EERE)

    at Mirror Lake Research Site Citation U.S. Geological Survey. Borehole Imaging of In Situ Stress Tests at Mirror Lake Research Site Internet. 2013. U.S. Geological Survey. cited...

  9. High Dose Neutron Irradiation Performance of Dielectric Mirrors

    SciTech Connect (OSTI)

    Nimishakavi, Anantha Phani Kiran Kumar; Leonard, Keith J; Jellison Jr, Gerald Earle; Snead, Lance Lewis

    2015-01-01

    The study presents the high-dose behavior of dielectric mirrors specifically engineered for radiation-tolerance: alternating layers of Al2O3/SiO2 and HfO2/SiO2 were grown on sapphire substrates and exposed to neutron doses of 1 and 4 dpa at 458 10K in the High Flux Isotope Reactor (HFIR). In comparison to previously reported results, these higher doses of 1 and 4 dpa results in a drastic drop in optical reflectance, caused by a failure of the multilayer coating. HfO2/SiO2 mirrors failed completely when exposed to 1 dpa, whereas the reflectance of Al2O3/SiO2 mirrors reduced to 44%, eventually failing at 4 dpa. Transmission electron microscopy (TEM) observation of the Al2O3/SiO2 specimens showed SiO2 layer defects which increases size with irradiation dose. The typical size of each defect was 8 nm in 1 dpa and 42 nm in 4 dpa specimens. Buckling type delamination of the interface between the substrate and first layer was typically observed in both 1 and 4 dpa HfO2/SiO2 specimens. Composition changes across the layers were measured in high resolution scanning-TEM mode using energy dispersive spectroscopy. A significant interdiffusion between the film layers was observed in Al2O3/SiO2 mirror, though less evident in HfO2/SiO2 system. The ultimate goal of this work is the provide insight into the radiation-induced failure mechanisms of these mirrors.

  10. High-dose neutron irradiation performance of dielectric mirrors

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

    Nimishakavi Anantha Phani Kiran Kumar; Leonard, Keith J.; Jellison, Jr., Gerald Earle; Snead, Lance Lewis

    2015-05-01

    The study presents the high-dose behavior of dielectric mirrors specifically engineered for radiation-tolerance: alternating layers of Al2O3/SiO2 and HfO2/SiO2 were grown on sapphire substrates and exposed to neutron doses of 1 and 4 dpa at 458 10K in the High Flux Isotope Reactor (HFIR). In comparison to previously reported results, these higher doses of 1 and 4 dpa results in a drastic drop in optical reflectance, caused by a failure of the multilayer coating. HfO2/SiO2 mirrors failed completely when exposed to 1 dpa, whereas the reflectance of Al2O3/SiO2 mirrors reduced to 44%, eventually failing at 4 dpa. Transmission electron microscopymore » (TEM) observation of the Al2O3/SiO2 specimens showed SiO2 layer defects which increases size with irradiation dose. The typical size of each defect was 8 nm in 1 dpa and 42 nm in 4 dpa specimens. Buckling type delamination of the interface between the substrate and first layer was typically observed in both 1 and 4 dpa HfO2/SiO2 specimens. Composition changes across the layers were measured in high resolution scanning-TEM mode using energy dispersive spectroscopy. A significant interdiffusion between the film layers was observed in Al2O3/SiO2 mirror, though less evident in HfO2/SiO2 system. Lastly, the ultimate goal of this work is the provide insight into the radiation-induced failure mechanisms of these mirrors.« less

  11. High-dose neutron irradiation performance of dielectric mirrors

    SciTech Connect (OSTI)

    Nimishakavi Anantha Phani Kiran Kumar; Leonard, Keith J.; Jellison, Jr., Gerald Earle; Snead, Lance Lewis

    2015-05-01

    The study presents the high-dose behavior of dielectric mirrors specifically engineered for radiation-tolerance: alternating layers of Al2O3/SiO2 and HfO2/SiO2 were grown on sapphire substrates and exposed to neutron doses of 1 and 4 dpa at 458 10K in the High Flux Isotope Reactor (HFIR). In comparison to previously reported results, these higher doses of 1 and 4 dpa results in a drastic drop in optical reflectance, caused by a failure of the multilayer coating. HfO2/SiO2 mirrors failed completely when exposed to 1 dpa, whereas the reflectance of Al2O3/SiO2 mirrors reduced to 44%, eventually failing at 4 dpa. Transmission electron microscopy (TEM) observation of the Al2O3/SiO2 specimens showed SiO2 layer defects which increases size with irradiation dose. The typical size of each defect was 8 nm in 1 dpa and 42 nm in 4 dpa specimens. Buckling type delamination of the interface between the substrate and first layer was typically observed in both 1 and 4 dpa HfO2/SiO2 specimens. Composition changes across the layers were measured in high resolution scanning-TEM mode using energy dispersive spectroscopy. A significant interdiffusion between the film layers was observed in Al2O3/SiO2 mirror, though less evident in HfO2/SiO2 system. Lastly, the ultimate goal of this work is the provide insight into the radiation-induced failure mechanisms of these mirrors.

  12. Measurements of Photo-induced Changes in Conjugated Polymers

    DOE R&D Accomplishments [OSTI]

    Seager, C. H.; Sinclair, M. B.; Mc Branch, D.; Heeger, A. J.; Baker, G. L.

    1991-01-01

    We have used the highly sensitive technique of Photothermal Deflection Spectroscopy (PDS) to measure changes in the infrared absorption spectra of MEHPPV, P3HT and Polydiacetylene-4BCMU induced by pumping these polymers with light above the {pi} - {pi}* transition energy. In contrast to previous chopped light transmission measurements of these effects, the PDS technique can directly measure the buildup or decay of the absorption coefficient, {alpha}, on the time scale of second to days. In the case of MEHPPV we observe that the time scale of seconds to days. In the case of MEHPPV we observe that above-gap light causes the appearance of a broad infrared peak in {alpha}, which continues to grow-in hours after the pump light is first applied. For this polymer the general shape of the absorption spectra in the unpumped state mimics the photo-induced changes, suggesting that remnant photo-induced states determine the maximum transparency observed under normal experimental conditions. For P3HT and to a lesser extent, MEHPPV, we also observe irreversible photo-induced absorption components which we tentatively identify with photo-induced oxidation of the polymer matrix.

  13. The DONUT Experiment: Today in Energy History | Department of Energy

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

    The DONUT Experiment: Today in Energy History The DONUT Experiment: Today in Energy History July 21, 2016 - 5:30pm Addthis DONUT spokesman Vittorio Paolone, University of Pittsburgh, poses inside the magnet used to eliminate charged particles from the neutrino beam. | Photo courtesy of Fermilab. DONUT spokesman Vittorio Paolone, University of Pittsburgh, poses inside the magnet used to eliminate charged particles from the neutrino beam. | Photo courtesy of Fermilab. Allison Lantero Allison

  14. Internships Help Future Energy Leaders Gain Hands-On Experience |

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

    Department of Energy Internships Help Future Energy Leaders Gain Hands-On Experience Internships Help Future Energy Leaders Gain Hands-On Experience August 23, 2013 - 10:19am Addthis EM Office of External Affairs Acting Communications Director Dave Borak talks with EM intern Valerie Edwards. | Photo courtesy of the Energy Department. EM Office of External Affairs Acting Communications Director Dave Borak talks with EM intern Valerie Edwards. | Photo courtesy of the Energy Department. Rebecca

  15. Elongational rheology and cohesive fracture of photo-oxidated LDPE

    SciTech Connect (OSTI)

    Roln-Garrido, Vctor H. Wagner, Manfred H.

    2014-01-15

    It was found recently that low-density polyethylene (LDPE) samples with different degrees of photo-oxidation represent an interesting system to study the transition from ductile to cohesive fracture and the aspects of the cohesive rupture in elongational flow. Sheets of LDPE were subjected to photo-oxidation in the presence of air using a xenon lamp to irradiate the samples for times between 1 day and 6 weeks. Characterisation methods included Fourier transform infrared spectroscopy, solvent extraction method, and rheology in shear and uniaxial extensional flows. Linear viscoelasticity was increasingly affected by increasing photo-oxidation due to crosslinking of LDPE, as corroborated by the carbonyl index, acid and aldehydes groups, and gel fraction. The molecular stress function model was used to quantify the experimental data, and the nonlinear model parameter ? was found to be correlated with the gel content. The uniaxial data showed that the transition from ductile to cohesive fracture was shifted to lower elongational rates, the higher the gel content was. From 2 weeks photo-oxidation onwards, cohesive rupture occurred at every strain rate investigated. The true strain and true stress at cohesive fracture as well as the energy density applied to the sample up to fracture were analyzed. At low gel content, rupture was mainly determined by the melt fraction while at high gel content, rupture occurred predominantly in the gel structure. The strain at break was found to be independent of strain rate, contrary to the stress at break and the energy density. Thus, the true strain and not the stress at break or the energy density was found to be the relevant physical quantity to describe cohesive fracture behavior of photo-oxidated LDPE. The equilibrium modulus of the gel structures was correlated with the true strain at rupture. The stiffer the gel structure, the lower was the deformation tolerated before the sample breaks.

  16. Photo of the Week: Argonne's 10 kW Wind Turbine | Department...

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

    Photo of the Week: Argonne's 10 kW Wind Turbine Photo of the Week: Argonne's 10 kW Wind Turbine November 9, 2012 - 11:57am Addthis At Argonne National Laboratory, the power...

  17. Best of 2013: Favorites from Photo of the Week | Department of...

    Office of Environmental Management (EM)

    Best of 2013: Favorites from Photo of the Week Best of 2013: Favorites from Photo of the Week Addthis Controlling Chaos with Magnetic Fields 1 of 12 Controlling Chaos with Magnetic ...

  18. Evaluation of photo-induced reactions on 39,41K (Technical Report...

    Office of Scientific and Technical Information (OSTI)

    Technical Report: Evaluation of photo-induced reactions on 39,41K Citation Details In-Document Search Title: Evaluation of photo-induced reactions on 39,41K Authors: Kawano, ...

  19. Photon energy dependence of photo-induced inverse spin-Hall effect in Pt/GaAs and Pt/Ge

    SciTech Connect (OSTI)

    Isella, Giovanni Bottegoni, Federico; Ferrari, Alberto; Finazzi, Marco; Ciccacci, Franco

    2015-06-08

    We report the photon energy dependence of photo-induced inverse spin Hall effect (ISHE) in Pt/GaAs and Pt/Ge Schottky junctions. The experimental results are compared with a spin drift-diffusion model, which highlights the role played by the different spin lifetime in the two semiconductors, in determining the energy dependence of the ISHE signal detected in the Pt layer. The good qualitative agreement between experiments and modelling indicates that photo-induced ISHE can be used as a tool to characterize spin lifetime in semiconductors.

  20. BooNE: Booster Neutrino Experiment

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

    Experiment Details This page provides information on the MiniBooNE experiment. Images are linked in their own page with captions. Additional resources are the Talks, Slides and Posters page, Publications page, and Data Release page Beamline Flux Detector Cross sections Light Propagation (Optical Model) Calibration Particle Identification BooNE photo montage

  1. Communications system using a mirror kept in outer space by electromagnetic radiation pressure

    DOE Patents [OSTI]

    Csonka, Paul L.

    1981-01-01

    A method and system are described for transmitting electromagnetic radiation by using a communications mirror located between about 100 kilometers and about 200 kilometers above ground. The communications mirror is kept aloft above the atmosphere by the pressure of the electromagnetic radiation which it reflects, and which is beamed at the communications mirror by a suitably constructed transmitting antenna on the ground. The communications mirror will reflect communications, such as radio, radar, or television waves up to about 1,100 kilometers away when the communications mirror is located at a height of about 100 kilometers.

  2. Mirror panel layouts for an icosahedral solar bowl. The Crosbyton Solar Power Project

    SciTech Connect (OSTI)

    Anderson, R.M.; Barnard, R.W.; Ford, W.T.

    1986-03-15

    This study is concerned with designing mirror panel layouts for a spherical shaped solar bowl. It was carried out as part of the Crosbyton Solar Power Project (CSPP). The CSPP is concerned with the development of a technology for producing electric power from steam generated by reflection of the sun's rays from a fixed mirror solar bowl onto a tracking receiver. In this system, the receiver is cantilevered and pivots about the center of curvature of the mirror. This study describes mathematical techniques for designing the mirror surface. The method is based on an icosahedral breakdown of the surface of a sphere and the resulting bowl is called an icosahedral bowl. As an example, a sixty degree icosahedral bowl is constructed from two sets of fifteen identical spherical triangles. These thirty spherical triangles are called superpanels and are used to support several smaller mirrors. The small mirrors used to cover the surface of the icosahedral bowl are hexagonal in shape. This shape mirror gives extremely good coverage of the bowl surface and minimizes parameters such as total mirror perimeter and gap area between mirrors. In addition, this choice of mirror shape yields the same mirror panel layout on each superpanel.

  3. Ultra-nonlocality in density functional theory for photo-emission spectroscopy

    SciTech Connect (OSTI)

    Uimonen, A.-M.; Stefanucci, G.; INFN, Laboratori Nazionali di Frascati, Via E. Fermi 40, 00044 Frascati; European Theoretical Spectroscopy Facility , Louvain-la Neuve ; Leeuwen, R. van; European Theoretical Spectroscopy Facility , Louvain-la Neuve

    2014-05-14

    We derive an exact expression for the photocurrent of photo-emission spectroscopy using time-dependent current density functional theory (TDCDFT). This expression is given as an integral over the Kohn-Sham spectral function renormalized by effective potentials that depend on the exchange-correlation kernel of current density functional theory. We analyze in detail the physical content of this expression by making a connection between the density-functional expression and the diagrammatic expansion of the photocurrent within many-body perturbation theory. We further demonstrate that the density functional expression does not provide us with information on the kinetic energy distribution of the photo-electrons. Such information can, in principle, be obtained from TDCDFT by exactly modeling the experiment in which the photocurrent is split into energy contributions by means of an external electromagnetic field outside the sample, as is done in standard detectors. We find, however, that this procedure produces very nonlocal correlations between the exchange-correlation fields in the sample and the detector.

  4. Electroless nickel and ion-plated protective coatings for silvered glass mirrors

    SciTech Connect (OSTI)

    Lind, M.A.; Chaudiere, D.A.; Dake, L.S.; Stewart, T.L.

    1982-04-01

    A preliminary examination of two methods of protecting second surface silvered glass mirrors from environmental degradation is presented. One method employed silver mirrors overcoated with Al, Ni, 304 stainless steel, Cr, or an Al/Cu alloy prepared by ion-plating. The other method used conventional wet process silver mirrors protected with a thin electroless nickel coating. No attempt was made to optimize the coatings for either method. These experimental mirrors were compared with conventional paint backed silver/copper mirrors after exposure to elevated temperatures and water vapor in order to estimate their relative environmental stability. The electroless nickel mirrors showed consistently more resistance to these stresses than either the conventional or ion-plated mirrors, suggesting that they may provide more durable field service.

  5. Mirror force induced wave dispersion in Alfvn waves

    SciTech Connect (OSTI)

    Damiano, P. A.; Johnson, J. R.

    2013-06-15

    Recent hybrid MHD-kinetic electron simulations of global scale standing shear Alfvn waves along the Earth's closed dipolar magnetic field lines show that the upward parallel current region within these waves saturates and broadens perpendicular to the ambient magnetic field and that this broadening increases with the electron temperature. Using resistive MHD simulations, with a parallel Ohm's law derived from the linear Knight relation (which expresses the current-voltage relationship along an auroral field line), we explore the nature of this broadening in the context of the increased perpendicular Poynting flux resulting from the increased parallel electric field associated with mirror force effects. This increased Poynting flux facilitates wave energy dispersion across field lines which in-turn allows for electron acceleration to carry the field aligned current on adjacent field lines. This mirror force driven dispersion can dominate over that associated with electron inertial effects for global scale waves.

  6. Mirror fusion. Quarterly report, April-June 1981

    SciTech Connect (OSTI)

    Not Available

    1981-09-11

    The information in each Quarterly is presented in the same sequence as in the Field Work Package Proposal and Authorization System (WPAS) submissions prepared for the U.S. Department of Energy; the main sections are Applied Plasma Physics, Confinement Systems, Development and Technology, and Mirror Fusion Test Facility (Planning and Projects). On occasion, we shall include information pertaining to the LLNL role as Lead Laboratory for the Open Systems Mirror Fusion Program. Each of these sections is introduced by an overall statement of the goals and purposes of the groups reporting in it. As appropriate within each section, statements of the goals of individual programs and projects are followed by articles containing summaries of significant recent activity and descriptive text.

  7. Cryogenic systems for the Mirror Fusion Test Facility

    SciTech Connect (OSTI)

    Slack, D.S.; Nelson, R.L.; Chronis, W.C.

    1985-08-01

    This paper includes an in-depth discussion of the design, fabrication, and operation of the Mirror Fusion Test Facility (MFTF) cryogenic system located at Lawrence Livermore National Laboratory (LLNL). Each subsystem discussed to present a basic composite of the entire facility. The following subsystems are included: 500kW nitrogen reliquefier, subcoolers, and distribution system; 15kW helium refrigerator/liquefier and distribution system; helium recovery and storage system; rough vacuum and high vacuum systems.

  8. DOE - NNSA/NFO -- Photo Library Atmospheric Testing

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

    Atmospheric NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - Atmospheric Testing A total of 100 atmospheric tests were conducted at the Nevada Test Site. These tests were conducted to provide information on weapons effects, effects of the height of burst on overpressure, and information on nuclear phenomena to improve the design of nuclear weapons. Atmospheric testing ceased for good in 1963, after which nuclear testing moved underground. Instructions: Click the

  9. DOE - NNSA/NFO -- Photo Library Cultural Resources

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

    Cultural Resources NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - Cultural Resources Prehistoric cultural resources are abundant at the Nevada National Security Site, indicating Native Americans have occupied the region for more than 10,000 years. Historic artifacts of more recent origin are also present, reflecting use by miners, ranchers and settlers who traveled through the area. Instructions: Click the photograph THUMBNAIL to view the photograph details Click

  10. DOE - NNSA/NFO -- Photo Library Exhibits and Displays

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

    Exhibits and Displays NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - Exhibits and Displays Educational exhibits and displays are available for loan to libraries, schools and for conferences and other special events. To request an exhibit or display, please fill out and submit the Exhibits and Display Request Form. Instructions: Click the photograph THUMBNAIL to view the photograph details Thumbnail Title ER-Banner-Stand17 Groundwater Poster Groundwater Poster Kids

  11. DOE - NNSA/NFO -- Photo Library First Responder

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

    First Responder Training NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - First Responder Training The aim of the First Responder Training is to provide a comprehensive, fully integrated system of facilities and capabilities to meet a wide range of combating terrorism requirements. Users of the First Responder Training can accomplish multiple requirements, conduct training and exercises in a variety of complex scenarios, and test new technologies in realistic

  12. DOE - NNSA/NFO -- Photo Library NNSS History

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

    Nevada National Security Site History NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - Nevada National Security Site History The Nevada National Security Site story begins in 1948 after the atomic test series Operation Sandstone in the Enewetak atoll. In 1950, a more complete survey of the south site, amid the Las Vegas Bombing and Gunnery Range, was conducted and resulted in test officials' endorsements. In December, the United States Air Force, landlord of the

  13. DOE - NNSA/NFO -- Photo Library OPERATION DOORSTEP

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

    Operation Doorstep NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - Operation Doorstep Operation Doorstep and Operation Cue. This video shows Federal Civil Defense Administration film footage. In the Operation Doorstep portion, footage shows blast and thermal effects on mannequins, automobiles, and wooden frame houses. [ Full Text ] Instructions: Click the photograph THUMBNAIL to view the photograph details Click the Category, Number, or Date table header links to

  14. DOE - NNSA/NFO -- Photo Library OPERATION TEAPOT

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

    Operation Teapot NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - Operation Teapot Operation Teapot consisted of 14 nuclear tests. The goal of the series was to test nuclear devices for possible inclusion in the nuclear weapons stockpile; improve military tactics, equipment and training; and study civil defense requirements. [ Full Text ] Instructions: Click the photograph THUMBNAIL to view the photograph details Click the Category, Number, or Date table header links

  15. DOE - NNSA/NFO -- Photo Library Underground Testing

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

    Underground Testing NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - Underground Testing Between 1951 and 1992, 828 underground nuclear tests were conducted in specially drilled shafts, horizontal tunnels and craters at the Nevada National Security Site. Most vertical shaft tests assisted in the development of new weapon systems. Horizontal tunnel tests occurred to evaluate the effects (radiation, ground shock) of various weapons on military hardware and systems.

  16. DOE - NNSA/NFO -- Photo Library Upshot-Knothole

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

    Upshot-Knothole NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - Upshot Knothole This operation conducted at the Nevada National Security Site consisted of 11 atmospheric tests. There were three airdrops, seven tower tests, and one airburst. Conducted between March 17 and June 4, 1953, this operation involved the testing of new theories, using both fission and fusion devices. [ Full Text ] Instructions: Click the photograph THUMBNAIL to view the photograph details

  17. Photo of the Week: Boosting Solar Technology | Department of Energy

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

    Boosting Solar Technology Photo of the Week: Boosting Solar Technology April 15, 2013 - 4:47pm Addthis Concentrated solar panels are getting a power boost. This summer, Pacific Northwest National Laboratory (PNNL) will be testing a new concentrated solar power system -- one that can help natural gas power plants reduce their fuel usage by up to 20 percent. PNNL has developed a system that uses a thermochemical conversion device to convert natural gas and sunlight into a more energy-rich fuel

  18. Photo of the Week: Grid Friendly | Department of Energy

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

    Grid Friendly Photo of the Week: Grid Friendly November 20, 2014 - 4:41pm Addthis Researchers at Pacific Northwest National Laboratory helped develop this integrated circuit to help make home appliances more responsive to the electric grid. When installed in refrigerators, air conditioners, water heaters and other appliances, the 2.5-inch Grid Friendly Appliance Controller can recognize when there's a power grid overload -- and will switch your appliances off and back on again to help conserve

  19. Photo of the Week: I, Robot Olympics | Department of Energy

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

    Olympics Photo of the Week: I, Robot Olympics January 11, 2013 - 2:46pm Addthis Last week, students from dozens of local Tennessee high schools gathered at Oak Ridge National Laboratory's Manufacturing Demonstration Facility to check out the game field that they'll be working with in the next six weeks. This year, the young engineers' challenges include building robots that can throw discs and climb pyramids. <a

  20. Photo of the Week: I, Robot Rodeo | Department of Energy

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

    Rodeo Photo of the Week: I, Robot Rodeo November 7, 2013 - 4:28pm Addthis This past summer, Sandia National Laboratories hosted the 2013 Robot Rodeo – a 10-event technical challenge that determines the best robot designs for diffusing dangerous situations. The rodeo is a free event that usually includes entries from police departments and military bases in nearby states. By developing these technologies, robots could potentially remove the danger to humans from the first response to unknown

  1. Improved Semiconductor Electrode for Photo-electrochemistry - Energy

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

    Innovation Portal Hydrogen and Fuel Cell Hydrogen and Fuel Cell Find More Like This Return to Search Improved Semiconductor Electrode for Photo-electrochemistry National Renewable Energy Laboratory Contact NREL About This Technology Technology Marketing Summary Producing hydrogen from clean sources of energy has been one of the major challenges of hydrogen production. While production from fossil fuel processes has been the norm, one of the most promising clean technologies has been hydrogen

  2. Suite of Photo-electrochemical Technologies for Hydrogen Production -

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

    Energy Innovation Portal Vehicles and Fuels Vehicles and Fuels Solar Photovoltaic Solar Photovoltaic Hydrogen and Fuel Cell Hydrogen and Fuel Cell Advanced Materials Advanced Materials Find More Like This Return to Search Suite of Photo-electrochemical Technologies for Hydrogen Production National Renewable Energy Laboratory Contact NREL About This Technology Technology Marketing Summary The primary fuel powering new fuel cell technologies is hydrogen. The market for fuel cells is expected

  3. Skirting terahertz waves in a photo-excited nanoslit structure

    SciTech Connect (OSTI)

    Shalaby, Mostafa E-mail: thomas.feurer@iap.unibe.ch; Fabia?ska, Justyna; Feurer, Thomas E-mail: thomas.feurer@iap.unibe.ch; Peccianti, Marco; Ozturk, Yavuz; Vidal, Francois; Morandotti, Roberto; Sigg, Hans

    2014-04-28

    Terahertz fields can be dramatically enhanced as they propagate through nanometer-sized slits. The enhancement is mediated by a significant accumulation of the induced surface charges on the surrounding metal. This enhancement is shown here to be dynamically modulated while the nanoslits are gradually shunted using a copropagating optical beam. The terahertz fields are found to skirt the nanoscale photo-excited region underneath the slits, scattering to the far field and rigorously mapping the near field.

  4. Photo Gallery: National Labs and the Science Behind Nuclear Security |

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

    Department of Energy National Labs and the Science Behind Nuclear Security Photo Gallery: National Labs and the Science Behind Nuclear Security April 3, 2015 - 12:35pm Addthis Argonne National Laboratory (Lemont, Illinois) 1 of 10 Argonne National Laboratory (Lemont, Illinois) The Warheads to Ploughshares program relied on Argonne scientists to convert the equivalent of about 20,000 nuclear warheads into fuel that provides electricity in America. The lab researches nuclear energy; nuclear

  5. Photo of the Week: The Olympus Supercomputer | Department of Energy

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

    The Olympus Supercomputer Photo of the Week: The Olympus Supercomputer September 5, 2013 - 2:08pm Addthis Fun fact: Most systems require air conditioning or chilled water to cool super powerful supercomputers, but the Olympus supercomputer at Pacific Northwest National Laboratory is cooled by the location's 65 degree groundwater. Traditional cooling systems could cost up to $61,000 in electricity each year, but this more efficient setup uses 70 percent less energy. PNNL's scientists use the

  6. Photo-voltaic power generating means and methods

    SciTech Connect (OSTI)

    Kroger, F.A.; Kanaster, M.B.; Panicker, R.M.P.; Rod, R.L.

    1984-01-10

    A photo-voltaic power cell based on a photoelectric semiconductor compound and the method of using and making the same. The semiconductor compound in the photo-voltaic power cell of the present invention can be electrolytically formed at a cathode in an electrolytic solution by causing discharge or decomposition of ions or molecules of a non-metallic component with deposition of the non-metallic component on the cathode and simultaneously providing ions of a metal component which discharge and combine with the non-metallic component at the cathode thereby forming the semiconductor compound film material thereon. By stoichiometrically adjusting the amounts of the components, or otherwise by introducing dopants into the desired amounts, an N-type layer can be formed and thereafter a P-type layer can be formed with a junction therebetween. The invention is effective in producing homojunction semiconductor materials and heterojunction semiconductor materials. The present invention also provides a method of using three electrodes in order to form the semiconductor compound material on one of these electrodes. Various examples are given for manufacturing different photo-voltaic cells in accordance with the present invention.

  7. Photo-voltaic power generating means and methods

    SciTech Connect (OSTI)

    Kroger, Ferdinand A.; Rod, Robert L.; Panicker, M. P. Ramachandra

    1983-08-23

    A photo-voltaic power cell based on a photoelectric semiconductor compound and the method of using and making the same. The semiconductor compound in the photo-voltaic power cell of the present invention can be electrolytically formed at a cathode in an electrolytic solution by causing discharge or decomposition of ions or molecules of a non-metallic component with deposition of the non-metallic component on the cathode and simultaneously providing ions of a metal component which discharge and combine with the non-metallic component at the cathode thereby forming the semiconductor compound film material thereon. By stoichiometrically adjusting the amounts of the components, or otherwise by introducing dopants into the desired amounts, an N-type layer can be formed and thereafter a P-type layer can be formed with a junction therebetween. The invention is effective in producing homojunction semiconductor materials and heterojunction semiconductor materials. The present invention also provides a method of using three electrodes in order to form the semiconductor compound material on one of these electrodes. Various examples are given for manufacturing different photo-voltaic cells in accordance with the present invention.

  8. Photo-voltaic power generating means and methods

    SciTech Connect (OSTI)

    Kroger, F.A.; Panicker, M.P.R.; Rod, R.L.

    1983-08-23

    A photo-voltaic power cell is disclosed, based on a photoelectric semiconductor compound and the method of using and making the same. The semiconductor compound in the photo-voltaic power cell of the present invention can be electrolytically formed at a cathode in an electrolytic solution by causing discharge or decomposition of ions or molecules of a non- metallic component with deposition of the non-metallic component on the cathode and simultaneously providing ions of a metal component which discharge and combine with the non-metallic component at the cathode thereby forming the semiconductor compound film material thereon. By stoichiometrically adjusting the amounts of the components, or otherwise by introducing dopants into the desired amounts, an N-type layer can be formed and thereafter a P-type layer can be formed with a junction therebetween. The invention is effective in producing homojunction semiconductor materials and heterojunction semiconductor materials. The present invention also provides a method of using three electrodes in order to form the semiconductor compound material on one of these electrodes. Various examples are given for manufacturing different photo-voltaic cells in accordance with the present invention.

  9. The Mirror Fusion Test Facility cryogenic system: Performance, management approach, and present equipment status

    SciTech Connect (OSTI)

    Slack, D.S.; Chronis, W.C.

    1987-06-08

    The cryogenic system for the Mirror Fusion Test Facility (MFTF) is a 14-kW, 4.35-K helium refrigeration system that proved to be highly successful and cost-effective. All operating objectives were met, while remaining within a few percent of initial cost and schedule plans. The management approach used in MFTF allowed decisions to be made quickly and effectively, and it helped keep costs down. Manpower levels, extent and type of industrial participation, key aspects of subcontractor specifications, and subcontractor interactions are reviewed, as well as highlights of the system tests, operation, and present equipment status. Organizations planning large, high-technology systems may benefit from this experience with the MFTF cryogenic system.

  10. X-ray metrology and performance of a 45-cm long x-ray deformable mirror

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

    Poyneer, Lisa A.; Brejnholt, Nicolai F.; Hill, Randall; Jackson, Jessie; Hagler, Lisle; Celestre, Richard; Feng, Jun

    2016-05-20

    We describe experiments with a 45-cm long x-ray deformable mirror (XDM) that have been conducted in End Station 2, Beamline 5.3.1 at the Advanced Light Source. A detailed description of the hardware implementation is provided. We explain our one-dimensional Fresnel propagation code that correctly handles grazing incidence and includes a model of the XDM. This code is used to simulate and verify experimental results. Initial long trace profiler metrology of the XDM at 7.5 keV is presented. The ability to measure a large (150-nm amplitude) height change on the XDM is demonstrated. The results agree well with the simulated experimentmore » at an error level of 1 μrad RMS. Lastly, direct imaging of the x-ray beam also shows the expected change in intensity profile at the detector.« less

  11. Coherent orbital waves during an Ultrafast Photo-induced Isulator-metal Transition in a magnetoresistive manganite

    SciTech Connect (OSTI)

    ULTRAS-INFM-CNR Dipartimento di Fisica, Politecnico di Milano, Italy; Department of Physics - Cavalleri Group, Clarendon Laboratory, University of Oxford, U.K.; Correlated Electron Research Center, Tsukuba, Japan; Schoenlein, Robert William; Polli, D.; Rini, M.; Wall, S.; Schoenlein, R.W.; Tomioka, Y.; Tokura, Y.; Cerullo, G.; Cavalleri, A.

    2007-06-01

    Photo-excitation can drive strongly correlated electron insulators into competing conducting phases1,2, resulting in giant and ultrafast changes of their electronic and magnetic properties. The underlying non-equilibrium dynamics involve many degrees of freedom at once, whereby sufficiently short optical pulses can trigger the corresponding collective modes of the solid along temporally coherent pathways. The characteristic frequencies of these modes range between the few GHz of acoustic vibrations3 to the tens or even hundreds of THz for purely electronic excitations. Virtually all experiments so far have used 100 fs or longer pulses, detecting only comparatively slow lattice dynamics4,5. Here, we use sub-10-fs optical pulses to study the photo-induced insulator-metal transition in the magneto-resistive manganite Pr0.7Ca0.3MnO3. At room temperature, we find that the time-dependent pathway towards the metallic phase is accompanied by coherent 31 THz oscillations of the optical reflectivity, significantly faster than all lattice vibrations. These high-frequency oscillations are suggestive of coherent orbital waves6,7, crystal-field excitations triggered here by impulsive stimulated Raman scattering. Orbital waves are likely to be initially localized to the small polarons of this room-temperature manganite, coupling to other degrees of freedom at longer times, as photo-domains coalesce into a metallic phase.

  12. Time resolved photo-luminescent decay characterization of mercury cadmium telluride focal plane arrays

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

    Soehnel, Grant

    2015-01-20

    The minority carrier lifetime is a measurable material property that is an indication of infrared detector device performance. To study the utility of measuring the carrier lifetime, an experiment has been constructed that can time resolve the photo-luminescent decay of a detector or wafer sample housed inside a liquid nitrogen cooled Dewar. Motorized stages allow the measurement to be scanned over the sample surface, and spatial resolutions as low as 50µm have been demonstrated. A carrier recombination simulation was developed to analyze the experimental data. Results from measurements performed on 4 mercury cadmium telluride focal plane arrays show strong correlationmore » between spatial maps of the lifetime, dark current, and relative response.« less

  13. Photo-fusion reactions in a new compact device for ELI

    SciTech Connect (OSTI)

    Moustaizis, S. D.; Auvray, P.; Hora, H.; Lalousis, P.; Larour, J.; Mourou, G.

    2012-07-09

    In the last few years significant progress on technological, experimental and numerical studies on fusion process in high density and high temperature plasmas produced by a high intensity laser pulse interaction with clusters in a high external applied magnetic field, enable us to propose a compact photo-fusion magnetic device for high neutron production. For the purpose of the project a pulsed magnetic field driver with values up to 110 Tesla has been developed which allows increasing the trapping time of the high density plasma in the device and improving the neutron yield. Numerical simulations show that the proposed device is capable of producing up to 10{sup 9}-10{sup 10} neutrons per laser shot with an external magnetic field of 150 Tesla. The proposed device can be used for experiments and numerical code validation concerning different conventional and (or) exotic fusion fuels.

  14. Using the X-FEL to photo-pump X-ray laser transitions in He-like Ne

    SciTech Connect (OSTI)

    Nilsen, J; Rohringer, N

    2011-08-30

    Nearly four decades ago H-like and He-like resonantly photo-pumped laser schemes were proposed for producing X-ray lasers. However, demonstrating these schemes in the laboratory has proved to be elusive because of the difficulty of finding a strong resonant pump line. With the advent of the X-ray free electron laser (X-FEL) at the SLAC Linac Coherent Light Source (LCLS) we now have a tunable X-ray laser source that can be used to replace the pump line in previously proposed laser schemes and allow researchers to study the physics and feasibility of resonantly photo-pumped laser schemes. In this paper we use the X-FEL at 1174 eV to photo-pump the singly excited 1s2p state of He-like Ne to the doubly excited 2p3p state and model gain on the 2p3p-2p2s transition at 175 eV and the 2p3p-1s3p transition at 1017 eV. One motivation for studying this scheme is to explore possible quenching of the gain due to strong non-linear coupling effects from the intense X-FEL beam We compare this scheme with photo-pumping the He-like Ne ground state to the 1s3p singly excited state followed by lasing on the 3p-2s and 3d-2p transitions at 158 and 151 eV. Experiments are being planned at LCLS to study these laser processes and coherent quantum effects.

  15. Apparatus and process for removing a predetermined portion of reflective material from mirror

    DOE Patents [OSTI]

    Perry, Stephen J.; Steinmetz, Lloyd L.

    1994-01-01

    An apparatus and process are disclosed for removal of a stripe of soft reflective material of uniform width from the surface of a mirror by using a blade having a large included angle to inhibit curling of the blade during the cutting operation which could result in damage to the glass substrate of the mirror. The cutting blade is maintained at a low blade angle with respect to the mirror surface to produce minimal chipping along the cut edge and to minimize the force exerted on the coating normal to the glass surface which could deform the flat mirror. The mirror is mounted in a cutting mechanism containing a movable carriage on which the blade is mounted to provide very accurate straightness of the travel of the blade along the mirror.

  16. At Plasma Camp, teachers experience research front and center | Princeton

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

    Plasma Physics Lab At Plasma Camp, teachers experience research front and center By Constance Kaita August 12, 2013 Tweet Widget Google Plus One Share on Facebook Wendy Dlakic, a physics and earth science teacher from Livingston, Mont., examines a plasma with Nick Guilbert, a master teacher and collaborator from The Peddie School, at this year's Plasma Camp for physics teachers at PPPL from July 15 to 19. (Photo by Photo by Elle Starkman/ PPPL Office of Communications) Wendy Dlakic, a

  17. High reflectivity mirrors and method for making same

    DOE Patents [OSTI]

    Heikman, Sten; Jacob-Mitos, Matthew; Li, Ting; Ibbetson, James

    2016-06-07

    A composite high reflectivity mirror (CHRM) with at least one relatively smooth interior surface interface. The CHRM includes a composite portion, for example dielectric and metal layers, on a base element. At least one of the internal surfaces is polished to achieve a smooth interface. The polish can be performed on the surface of the base element, on various layers of the composite portion, or both. The resulting smooth interface(s) reflect more of the incident light in an intended direction. The CHRMs may be integrated into light emitting diode (LED) devices to increase optical output efficiency

  18. Deployable telescope having a thin-film mirror and metering structure

    DOE Patents [OSTI]

    Krumel, Leslie J.; Martin, Jeffrey W.

    2010-08-24

    A deployable thin-film mirror telescope comprises a base structure and a metering structure. The base structure houses a thin-film mirror, which can be rolled for stowage and unrolled for deployment. The metering structure is coupled to the base structure and can be folded for stowage and unfolded for deployment. In the deployed state, the unrolled thin-film mirror forms a primary minor for the telescope and the unfolded metering structure positions a secondary minor for the telescope.

  19. The use of a high-order MEMS deformable mirror in the Gemini Planet Imager

    Office of Scientific and Technical Information (OSTI)

    (Conference) | SciTech Connect The use of a high-order MEMS deformable mirror in the Gemini Planet Imager Citation Details In-Document Search Title: The use of a high-order MEMS deformable mirror in the Gemini Planet Imager We briefly review the development history of the Gemini Planet Imager's 4K Boston Micromachines MEMS deformable mirror. We discuss essential calibration steps and algorithms to control the MEMS with nanometer precision, including voltage-phase calibration and influence

  20. Bob Ellis designs a PPPL first: A 3D printed mirror for microwave...

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

    ... The flat channels will increase the efficiency of the coolant, he said, which will be important for shedding heat from the constantly moving steerable mirror. Contact Info PPPL ...

  1. New Sandia Mirror Isn't Shiny: Instead It Reflects Infrared Light...

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

    ... New Sandia Mirror Isn't Shiny: Instead It Reflects Infrared Light Using a Metamaterial HomeCapabilities, Materials Science, News, News & Events, Research & CapabilitiesNew ...

  2. TOPHAT(tm) for the Alignment & Focus of Heliostat Mirror Facets...

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

    Increased efficiency & accuracy in solar mirror alignment Reduced loss of concentrated solar Increased efficiency in solar energy generation Can be used during heliostat assembly...

  3. High-resolution adaptive optics scanning laser ophthalmoscope with multiple deformable mirrors

    DOE Patents [OSTI]

    Chen, Diana C.; Olivier, Scot S.; Jones; Steven M.

    2010-02-23

    An adaptive optics scanning laser ophthalmoscopes is introduced to produce non-invasive views of the human retina. The use of dual deformable mirrors improved the dynamic range for correction of the wavefront aberrations compared with the use of the MEMS mirror alone, and improved the quality of the wavefront correction compared with the use of the bimorph mirror alone. The large-stroke bimorph deformable mirror improved the capability for axial sectioning with the confocal imaging system by providing an easier way to move the focus axially through different layers of the retina.

  4. DOE - NNSA/NFO -- Photo Library Details page

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

    Photo Details NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Instructions: Click the photograph number or name link below the thumbnail to view the full size image Photograph details are listed on the right Refer to the Viewing Instructions and FAQs for technical help Unable to display this Web Part. To troubleshoot the problem, open this Web page in a Windows SharePoint Services-compatible HTML editor such as Microsoft Office SharePoint Designer. If the problem persists, contact

  5. DOE - NNSA/NFO -- Photo Library EPA Farm

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

    EPA Farm NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - EPA Farm In November 1981, the last cattle roundup took place at the U.S. Department of Energy's (DOE) experimental farm, managed for DOE by the U.S. Environmental Protection Agency (EPA). Operations at this unique 30-acre experimental farm in Area 15 started in 1964 when the EPA was contracted to conduct research to determine if radioactive materials found in the environment were being transported to humans.

  6. DOE - NNSA/NFO -- Photo Library News & Views

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

    News & Views NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - NTS 50th Anniversary Newsletter (News & Views) This special issue of the NTS News & Views is dedicated to the thousands of men and women at the Nevada National Security Site (NNSS), who for 42 years have provided this Nation with a safe, strong and effective nuclear deterrent. This issue spotlights major events at the NTS from 1951 through 1993. Instructions: Click the photograph THUMBNAIL to

  7. DOE - NNSA/NFO -- Photo Library OPERATION IVY

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

    Operation Ivy NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - Operation Ivy Operation Ivy, Parts 1 and 2 - "The island of Elugelab is missing!" President Eisenhower heard this short report on the Mike shot in Operation Ivy from Gordon Dean, Chairman of the Atomic Energy Commission. Mike was the first full-fledged hydrogen bomb to be tested. [ Full Text ] Instructions: Click the photograph THUMBNAIL to view the photograph details Click the Category, Number,

  8. DOE - NNSA/NFO -- Photo Library RadNucCTEC

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

    RadNucCTEC NNSA/NFO Language Options U.S. DOE/NNSA - Nevada Field Office Photo Library - RadNucCTEC The Radiological/Nuclear Countermeasures Test and Evaluation Complex (Rad/NucCTEC) will allow crucial security research to prevent radiological or nuclear materials that could be used as dirty bombs, from entering the country. The evaluation of radiation seNFOrs and detection systems are a few of the activities the complex will support. The Department of Homeland Security has provided funding to

  9. Photo Gallery: 2016 Washington Auto Show | Department of Energy

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

    2016 Washington Auto Show Photo Gallery: 2016 Washington Auto Show January 27, 2016 - 12:15pm Addthis 1 of 20 Energy Secretary Ernest Moniz sits in the driver's seat of the all-electric Chevrolet Bolt at the Washington Auto Show. When it debuts on the road later this year, the Bolt will offer drivers about 200 miles of electric range. Image: Simon Edelman, Energy Department Date taken: 2016-01-21 09:45 2 of 20 The 2016 next-generation Chevrolet Volt builds on the success of its previous version,

  10. Photo of the Week: July 6, 2012 | Department of Energy

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

    6, 2012 Photo of the Week: July 6, 2012 July 6, 2012 - 1:31pm Addthis More than 200 Fermilab researchers and staffers crowded into an auditorium at 2 a.m. EDT July 4 and waited for the latest announcement regarding the Higgs boson. When CERN Director-General Rolf-Dieter Heuer said the words - "I think we have it" – the Fermilab crowd erupted into applause. Fermi National Accelerator Laboratory and Brookhaven National Laboratory are the host laboratories for the U.S. contingents of

  11. Photo of the Week: The Cosmic Frontier | Department of Energy

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

    The Cosmic Frontier Photo of the Week: The Cosmic Frontier March 7, 2014 - 4:10pm Addthis This week on Energy.gov, we’ve covered space and beyond -- from technologies at our National Labs that are working to prevent traffic jams in space, to infographics about collecting space-based solar power, to the real-world scientific counterparts to lightsabers. Throughout it all, we've featured experts at the Energy Department and National Labs who are contributing to the U.S. space program. This

  12. Photo of the Week: The VULCAN Diffractometer | Department of Energy

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

    The VULCAN diffractometer at Oak Ridge National Laboratory’s Spallation Neutron Source (SNS) was built to take measurements of engineered components like a jet engine turbine blade or the frame of a car. VULCAN can "see" inside the material and make three dimensional maps of the distance between atoms in critical sections. Scientists can use these maps to determine if the atoms are being squeezed together or pulled apart — signs of stress in the materials. This photo

  13. Antenna-coupled microcavities for enhanced infrared photo-detection

    SciTech Connect (OSTI)

    Nga Chen, Yuk; Todorov, Yanko Askenazi, Benjamin; Vasanelli, Angela; Sirtori, Carlo; Biasiol, Giorgio; Colombelli, Raffaele

    2014-01-20

    We demonstrate mid-infrared detectors embedded into an array of double-metal nano-antennas. The antennas act as microcavities that squeeze the electric field into thin semiconductor layers, thus enhancing the detector responsivity. Furthermore, thanks to the ability of the antennas to gather photons from an area larger than the device's physical dimensions, the dark current is reduced without hindering the photo-generation rate. In these devices, the background-limited performance is improved with a consequent increase of the operating temperature. Our results illustrate how the antenna-coupled microcavity concept can be applied to enhance the performances of infrared opto-electronic devices.

  14. Photo of the Week: 2014 | Department of Energy

    Energy Savers [EERE]

    4 Photo of the Week: 2014 Addthis Cold as Ice — Using Titan to Build More Efficient Wind Turbines 1 of 21 Cold as Ice - Using Titan to Build More Efficient Wind Turbines Wind energy is one of the world's fast-growing energy sources -- and many of the regions that could benefit from wind energy happen to be in cold climates. Since 2005, scientists at Oak Ridge National Laboratory have been researching, developing and testing materials in freezing conditions. By developing more efficient

  15. 2015 YWC in photos! | Princeton Plasma Physics Lab

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

    5 YWC in photos! View larger image 15 PR 0319 014 View larger image 15 PR 0319 016 View larger image HR 6 A 0020 View larger image 15 PR 0319 021 View larger image 15 PR 0319 034 View larger image 15 PR 0319 056 View larger image 15 PR 0319 069 View larger image 15 PR 0319 072 View larger image 15 PR 0319 100 View larger image 15 PR 0319 153 View larger image 15 PR 0319 156 View larger image 15 PR 0319 266 View larger image 15 PR 0319 272 View larger image 15 PR 0319 283 View larger image 15 PR

  16. #CleanTechNow: Your Best Clean Energy Photos | Department of Energy

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

    #CleanTechNow: Your Best Clean Energy Photos #CleanTechNow: Your Best Clean Energy Photos September 27, 2013 - 12:45pm Addthis Marissa Newhall Marissa Newhall Director of Digital Strategy and Communications Learn More: Follow @energy on Instagram to check out more great photos and videos about energy technology. Read an Energy Department report about the recent advances of wind, solar panels, electric vehicles and LED lighting in the consumer marketplace. Check out Secretary Moniz's blog post

  17. New Horizons Science Photos from NASA's Pluto-Kuiper Belt Mission

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    DOE provided the power supply for NASA's New Horizons Mission, a mission to the Pluto and Charon, a double-planet system, and the Kuiper Belt. There are science photos posted on the New Horizons website, along with mission photos, spacecraft images, launch photos, posters and renderings that are both scientific and artistic. The images can be searched by keywords, by date, or by subject topic. They can also be browsed as an entire list. Each image has a detailed description.

  18. Project Construction Photos | U.S. DOE Office of Science (SC)

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

    Project Construction Photos Project Assessment (OPA) OPA Home About Project Management SC Projects Review Dates (updated August 2016) Project Construction Photos Completed Projects Current Projects Other Links SC Federal Project Directors (FPD) and FPD Resources Contact Information Project Assessment U.S. Department of Energy SC-28/Germantown Building 1000 Independence Ave., SW Washington, DC 20585 P: (301) 903-4840 F: (301) 903-8520 E: Email Us SC Projects Project Construction Photos Print Text

  19. Photo of the Week: Smashing Atoms with 80-ton Magnets | Department...

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

    ... Photo of the Week: Inside the 60-Inch Cyclotron Super HILAC (Super Heavy Ion Linear Accelerator) was one of the first particle accelerators that could accelerate heavier elements ...

  20. PHOTOS: Vice President Biden Swears in New Deputy Secretary of Energy

    Broader source: Energy.gov [DOE]

    Check out photos from Vice President Joe Biden's visit to the Department of Energy, where he swore in the Department's new Deputy Secretary.

  1. 2011 National Science Bowl Photos | U.S. DOE Office of Science...

    Office of Science (SC) Website

    1 National Science Bowl Photos National Science Bowl (NSB) NSB Home About National Science Bowl Contacts Regional Science Bowl Coordinators National Science Bowl FAQ's Alumni ...

  2. 2010 National Science Bowl Photos | U.S. DOE Office of Science...

    Office of Science (SC) Website

    0 National Science Bowl Photos National Science Bowl (NSB) NSB Home About National Science Bowl Contacts Regional Science Bowl Coordinators National Science Bowl FAQ's Alumni ...

  3. Past National Science Bowl Photos and Videos | U.S. DOE Office...

    Office of Science (SC) Website

    Photos and Videos National Science Bowl (NSB) NSB Home About National Science Bowl Contacts Regional Science Bowl Coordinators National Science Bowl FAQ's Alumni Past National ...

  4. Photo-activated luminescence sensor and method of detecting trichloroethylene and related volatile organochloride compounds

    DOE Patents [OSTI]

    Dinh, T.V.

    1996-06-11

    A sensor for detecting trichloroethylene and related volatile organochloride compounds uses a photo-activator that produces a photo-product complex with the contaminant. Characteristics of the light emitted from the complex will indicate the presence of the contaminant. A probe containing the photo-activator has an excitation light interface and a contaminant interface. One particular embodiment uses a porous membrane as the contaminant interface, so that the contaminant can migrate there through to the photo-activator and thereby form the complex. 23 figs.

  5. Photo-activated luminescence sensor and method of detecting trichloroethylene and related volatile organochloride compounds

    DOE Patents [OSTI]

    Dinh, Tuan V.

    1996-01-01

    A sensor for detecting trichloroethylene and related volatile organochloride compounds uses a photo-activator that produces a photo-product complex with the contaminant. Characteristics of the light emitted from the complex will indicate the presence of the contaminant. A probe containing the photo-activator has an excitation light interface and a contaminant interface. One particular embodiment uses a porous membrane as the contaminant interface, so that the contaminant can migrate therethrough to the photo-activator and thereby form the complex.

  6. U.S. Department of Energy Earth Day 2015 Photo Contest CALLING...

    Office of Environmental Management (EM)

    Earth Day 2015 Photo Contest CALLING ALL PHOTOGRAPHERS Professionals, amateurs, and the camera sharp shooter We invite all DOE employees and DOE contractors to share images of...

  7. Photo of the Week: What Does a Particle Accelerator Have in Common...

    Energy Savers [EERE]

    Learn more about how FACET works. | Photo courtesy of SLAC National Accelerator Laboratory. Sarah Gerrity Sarah Gerrity Former Multimedia Editor, Office of Public Affairs Every ...

  8. Photo of the Week: Up in the Air | Department of Energy

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

    Up in the Air Photo of the Week: Up in the Air January 31, 2014 - 10:10am Addthis In this August 2013 photo, Pete Johnson of Gemini Rope Access Solutions rappels down a 3 megawatt Alstom wind turbine, just having finished inspecting the blades above him. The turbine was undergoing testing at NREL's National Wind Technology Center in Boulder, Colorado. | Photo courtesy of Dennis Schroeder, NREL. In this August 2013 photo, Pete Johnson of Gemini Rope Access Solutions rappels down a 3 megawatt

  9. Photo 3D-Printer, Image Credit, Ames Lab | OSTI, US Dept of Energy...

    Office of Scientific and Technical Information (OSTI)

    Photo 3D-Printer, Image Credit, Ames Lab Critical Materials Institute speed metals research with 3D printer. Default Caption and Credits Read More: Critical Materials Institute ...

  10. Photo of the Week: What Happens in Vegas... | Department of Energy

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

    Learn more about the Collegiate Wind Competition and the participant teams here. | Photo courtesy of the Energy Department. Sarah Gerrity Sarah Gerrity Former Multimedia Editor, ...

  11. 2010 DOE National Science Bowl® Photos - Smith Middle School...

    Office of Science (SC) Website

    Smith Middle School National Science Bowl (NSB) NSB Home About National Science Bowl ... 2010 DOE National Science Bowl Photos - Smith Middle School Print Text Size: A A A ...

  12. Kinetics of visible light photo-oxidation of Ge nanocrystals:Theory and in situ measurement

    SciTech Connect (OSTI)

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

    2006-11-14

    Photo-oxidation of Ge nanocrystals illuminated with visible laser light under ambient conditions was investigated. The photo-oxidation kinetics were monitored by in situ measurement of the crystalline Ge volume fraction by Raman spectroscopy. The effects of laser power and energy on the extent of oxidation were measured using both in situ and ex situ Raman scattering techniques. A mechanistic model in which the tunneling of photo-excited carriers to the oxide surface for electron activated molecular oxygen dissociation is proposed. This quantitative model successfully describes all experimental photo-oxidation observations using physical parameters.

  13. Performance optimization of a bendable parabolic cylinder collimating X-ray mirror for the ALS micro-XAS beamline 10.3.2

    SciTech Connect (OSTI)

    Yashchuk, Valeriy V.; Morrison, Gregory Y.; Marcus, Matthew A.; Domning, Edward E.; Merthe, Daniel J.; Salmassi, Farhad; Smith, Brian V.

    2015-04-08

    The Advanced Light Source (ALS) beamline (BL) 10.3.2 is an apparatus for X-ray microprobe spectroscopy and diffraction experiments, operating in the energy range 2.4–17 keV. The performance of the beamline, namely the spatial and energy resolutions of the measurements, depends significantly on the collimation quality of light incident on the monochromator. In the BL 10.3.2 end-station, the synchrotron source is imaged 1:1 onto a set of roll slits which form a virtual source. The light from this source is collimated in the vertical direction by a bendable parabolic cylinder mirror. Details are presented of the mirror design, which allows for precision assembly, alignment and shaping of the mirror, as well as for extending of the mirror operating lifetime by a factor of ~10. Assembly, mirror optimal shaping and preliminary alignment were performed ex situ in the ALS X-ray Optics Laboratory (XROL). Using an original method for optimal ex situ characterization and setting of bendable X-ray optics developed at the XROL, a root-mean-square (RMS) residual surface slope error of 0.31 µrad with respect to the desired parabola, and an RMS residual height error of less than 3 nm were achieved. Once in place at the beamline, deviations from the designed optical geometry (e.g. due to the tolerances for setting the distance to the virtual source, the grazing incidence angle, the transverse position) and/or mirror shape (e.g. due to a heat load deformation) may appear. Due to the errors, on installation the energy spread from the monochromator is typically a few electron-volts. Here, a new technique developed and successfully implemented for at-wavelength (in situ) fine optimal tuning of the mirror, enabling us to reduce the collimation-induced energy spread to ~0.05 eV, is described.

  14. Students try out PPPL plasma physics experiment that can be accessed...

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

    Students try out PPPL plasma physics experiment that can be accessed from anywhere in the ... and Paige Kunkle are fascinated by the plasma created by the RGDX. (Photo by Elle ...

  15. Hard X-ray nanofocusing using adaptive focusing optics based on piezoelectric deformable mirrors

    SciTech Connect (OSTI)

    Goto, Takumi; Nakamori, Hiroki; Sano, Yasuhisa; Matsuyama, Satoshi; Kimura, Takashi; Kohmura, Yoshiki; Tamasaku, Kenji; Yabashi, Makina; Ishikawa, Tetsuya

    2015-04-15

    An adaptive Kirkpatrick–Baez mirror focusing optics based on piezoelectric deformable mirrors was constructed at SPring-8 and its focusing performance characteristics were demonstrated. By adjusting the voltages applied to the deformable mirrors, the shape errors (compared to a target elliptical shape) were finely corrected on the basis of the mirror shape determined using the pencil-beam method, which is a type of at-wavelength figure metrology in the X-ray region. The mirror shapes were controlled with a peak-to-valley height accuracy of 2.5 nm. A focused beam with an intensity profile having a full width at half maximum of 110 × 65 nm (V × H) was achieved at an X-ray energy of 10 keV.

  16. All solid-state SBS phase conjugate mirror

    DOE Patents [OSTI]

    Dane, Clifford B.; Hackel, Lloyd A.

    1999-01-01

    A stimulated Brillouin scattering (SBS) phase conjugate laser mirror uses a solid-state nonlinear gain medium instead of the conventional liquid or high pressure gas medium. The concept has been effectively demonstrated using common optical-grade fused silica. An energy threshold of 2.5 mJ and a slope efficiency of over 90% were achieved, resulting in an overall energy reflectivity of >80% for 15 ns, 1 um laser pulses. The use of solid-state materials is enabled by a multi-pass resonant architecture which suppresses transient fluctuations that would otherwise result in damage to the SBS medium. This all solid state phase conjugator is safer, more reliable, and more easily manufactured than prior art designs. It allows nonlinear wavefront correction to be implemented in industrial and defense laser systems whose operating environments would preclude the introduction of potentially hazardous liquids or high pressure gases.

  17. Gamma Ray Mirrors for Direct Measurement of Spent Nuclear Fuel

    SciTech Connect (OSTI)

    Pivovaroff, Dr. Michael J.; Ziock, Klaus-Peter; Harrison, Mark J; Soufli, Regina

    2014-01-01

    Direct measurement of the amount of Pu and U in spent nuclear fuel represents a challenge for the safeguards community. Ideally, the characteristic gamma-ray emission lines from different isotopes provide an observable suitable for this task. However, these lines are generally lost in the fierce flux of radiation emitted by the fuel. The rates are so high that detector dead times limit measurements to only very small solid angles of the fuel. Only through the use of carefully designed view ports and long dwell times are such measurements possible. Recent advances in multilayer grazing-incidence gamma-ray optics provide one possible means of overcoming this difficulty. With a proper optical and coating design, such optics can serve as a notch filter, passing only narrow regions of the overall spectrum to a fully shielded detector that does not view the spent fuel directly. We report on the design of a mirror system and a number of experimental measurements.

  18. All solid-state SBS phase conjugate mirror

    DOE Patents [OSTI]

    Dane, C.B.; Hackel, L.A.

    1999-03-09

    A stimulated Brillouin scattering (SBS) phase conjugate laser mirror uses a solid-state nonlinear gain medium instead of the conventional liquid or high pressure gas medium. The concept has been effectively demonstrated using common optical-grade fused silica. An energy threshold of 2.5 mJ and a slope efficiency of over 90% were achieved, resulting in an overall energy reflectivity of >80% for 15 ns, 1 um laser pulses. The use of solid-state materials is enabled by a multi-pass resonant architecture which suppresses transient fluctuations that would otherwise result in damage to the SBS medium. This all solid state phase conjugator is safer, more reliable, and more easily manufactured than prior art designs. It allows nonlinear wavefront correction to be implemented in industrial and defense laser systems whose operating environments would preclude the introduction of potentially hazardous liquids or high pressure gases. 8 figs.

  19. Y-12 employees experience their connection to national security | Y-12

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

    National Security Complex employees experience ... Y-12 employees experience their connection to national security Posted: March 9, 2016 - 7:06pm A Missile Combat Crew commander from Malmstrom Air Force Base, Mont., practices procedures at Vandenberg AFB, Calif., in preparation for the launch of an unarmed Minuteman III intercontinental ballistic missile. Photo: U.S. Air Force photo, Michael Peterson Standing 30 feet below the cold, snow-covered Montana earth, looking at a live, 60-foot-tall

  20. Using Experience to Train the Next Generation of Workers | Department of

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

    Energy Using Experience to Train the Next Generation of Workers Using Experience to Train the Next Generation of Workers July 5, 2011 - 1:46pm Addthis Bob Wilds working at a winding machine. | Photo Courtesy of Waukesha Electric Systems Bob Wilds working at a winding machine. | Photo Courtesy of Waukesha Electric Systems Lindsey Geisler Lindsey Geisler Public Affairs Specialist, Office of Public Affairs Bob Wilds has worked at Waukesha Electric Systems for the last 12 years as a coil winder.

  1. Mirror Advanced Reactor Study (MARS): executive summary and overview

    SciTech Connect (OSTI)

    Logan, B.G.; Perkins, L.J.; Gordon, J.D.

    1984-07-01

    Two self-consistent MARS configurations are discussed - a 1200-MWe commercial electricity-generating plant and a synguels-generating plant that produces hydrogen with an energy equivalent to 26,000 barrels of oil per day. The MARS machine emphasizes the attractive features of the tandem mirror concept, including steady-state operation, a small-diameter high-beta plasma, a linear central cell with simple low-maintenance blankets, low first-wall heat fluxes (<10 W/cm/sup 2/), no driven plasma currents or associated disruptions, natural halo impurity diversion, and direct conversion of end-loss charged-particle power. The MARS electric plant produces 2600 MW of fusion power in a 130-m-long central cell. Advanced tandem-mirror plasma-engineering concepts, a high-efficiency liquid lithium-lead (Li/sub 17/Pb/sub 83/) blanket, and efficient direct electrical conversion of end loss power combine to produce a high net plant efficiency of 36%. With a total capital cost of $2.9 billion (constant 1983 dollars), the MARS electric plant produces busbar electricity at approx. 7 cents/kW-hour. The MARS synfuels plant produces 3500 MW of fusion power in a 150-m-long central cell. A helium-gas-cooled silicon carbide pebble-bed blanket provides high-temperature (1000/sup 0/C) heat to a thermochemical water-splitting cycle and the resulting hydrogen is catalytically converted to methanol for distribution. With a total capital cost of $3.6 billion (constant 1983 dollars), the synfuels plant produces methanol fuel at about $1.7/gal. The major features of the MARS reactor include sloshing-ion thermal barrier plugs for efficient plasma confinement, a high efficiency blanket, high-field (24-T) choke cells, drift pumping for trapped plasma species, quasi-optical electron-cyclotron resonant heating (ECRH) systems, and a component gridless direct converter.

  2. Identifying irradiated flours by photo-stimulated luminescence technique

    SciTech Connect (OSTI)

    Ramli, Ros Anita Ahmad; Yasir, Muhamad Samudi; Othman, Zainon; Abdullah, Wan Saffiey Wan

    2014-02-12

    Photo-stimulated luminescence (PSL) technique was used in this study to detect gamma irradiation treatment of five types of flours (corn, rice, tapioca, wheat and glutinous rice) at four different doses 0, 0.2, .05 and 1kGy. The signal level was compared with two threshold values (700 and 5000). With the exception of glutinous rice, all irradiated samples produced a strong signal above the upper threshold (5000 counts/60s). All control samples produced negative result with the signals below the lower threshold (700 counts/60s) suggesting that the samples have not been irradiated. Irradiated glutinous rice samples produced intermediate signals (700 - 5000 counts/60s) which were subsequently confirmed using calibrated PSL. The PSL signals remained stable after 90 days of storage. The findings of this study will be useful to facilitate control of food irradiation application in Malaysia.

  3. Photo Gallery (1947-Present) | OSTI, US Dept of Energy Office of

    Office of Scientific and Technical Information (OSTI)

    Scientific and Technical Information Photo Gallery (1947-Present) To view OSTI Historical Photo Gallery, you can browse the collections below. 1940s | 1950s | 1960s | 1970s | 1980s | 1990s | 2000s 1960s Key Punch Operator 2000 Science.gov Celebration Last updated on Monday 29 September 2014

  4. Photo annealing effect on p-doped inverted organic solar cell

    SciTech Connect (OSTI)

    Lafalce, Evan; Toglia, Patrick; Lewis, Jason E.; Jiang, Xiaomei

    2014-06-28

    We report the transient positive photo annealing effect in which over 600% boost of power conversion efficiency was observed in inverted organic photovoltaic devices (OPV) made from P3HT/PCBM by spray method, after 2?hrs of constant solar AM 1.5 irradiation at low temperature. This is opposite to usual photodegradation of OPV, and cannot be explained by thermal activation alone since the mere temperature effect could only account for 30% of the enhancement. We have investigated the temperature dependence, cell geometry, oxygen influence, and conclude that, for p-doped active layer at room temperature, the predominant mechanism is photo-desorption of O{sub 2}, which eliminates electron traps and reduces space charge screening. As temperature decreases, thermal activation and deep trap-state filling start to show noticeable effect on the enhancement of photocurrent at intermediate low temperature (T?=?125?K). At very low temperature, the dominant mechanism for photo annealing is trap-filling, which significantly reduces recombination between free and trapped carriers. At all temperature, photo annealing effect depends on illumination direction from cathode or anode. We also explained the large fluctuation of photocurrent by the capture/reemit of trapped electrons from shallow electron traps of O{sub 2}{sup -} generated by photo-doping. Our study has demonstrated the dynamic process of photo-doping and photo-desorption, and shown that photo annealing in vacuum can be an efficient method to improve OPV device efficiency.

  5. Coherent ?(2S) photo-production in ultra-peripheral PbPb collisions...

    Office of Scientific and Technical Information (OSTI)

    Coherent (2S) photo-production in ultra-peripheral PbPb collisions at sNN2.76 TeV Citation Details In-Document Search Title: Coherent (2S) photo-production in ultra-peripheral...

  6. Methods for improved selectivity in photo-activation and detection of molecular diagnostic agents

    DOE Patents [OSTI]

    Wachter, Eric A.; Fisher, Walter G.; Dees, H. Craig

    2008-03-18

    A method for the imaging of a particular volume of plant or animal tissue, wherein the plant or animal tissue contains at least one photo-active molecular agent. The method comprises the steps of treating the particular volume of the plant or animal tissue with light sufficient to promote a simultaneous two-photon excitation of the photo-active molecular agent contained in the particular volume of the plant or animal tissue, photo-activating at least one of the at least one photo-active molecular agent in the particular volume of the plant or animal tissue, thereby producing at least one photo-activated molecular agent, wherein the at least one photo-activated molecular agent emits energy, detecting the energy emitted by the at least one photo-activated molecular agent, and producing a detected energy signal which is characteristic of the particular volume of plant or animal tissue. The present invention also provides a method for the imaging of a particular volume of material, wherein the material contains at least one photo-active molecular agent.

  7. Method for improved selectivity in photo-activation and detection of molecular diagnostic agents

    DOE Patents [OSTI]

    Wachter, E.A.; Fisher, W.G.; Dees, H.C.

    1998-11-10

    A method for the imaging of a particular volume of plant or animal tissue, wherein the plant or animal tissue contains at least one photo-active molecular agent. The method includes the steps of treating the particular volume of the plant or animal tissue with light sufficient to promote a simultaneous two-photon excitation of the photo-active molecular agent contained in the particular volume of the plant or animal tissue, photo-activating at least one of the at least one photo-active molecular agent in the particular volume of the plant or animal tissue, thereby producing at least one photo-activated molecular agent, wherein the at least one photo-activated molecular agent emits energy, detecting the energy emitted by the at least one photo-activated molecular agent, and producing a detected energy signal which is characteristic of the particular volume of plant or animal tissue. The present invention is also a method for the imaging of a particular volume of material, wherein the material contains at least one photo-active molecular agent. 13 figs.

  8. Method for improved selectivity in photo-activation and detection of molecular diagnostic agents

    DOE Patents [OSTI]

    Wachter, Eric A.; Fisher, Walter G.; Dees, H. Craig

    1998-01-01

    A method for the imaging of a particular volume of plant or animal tissue, wherein the plant or animal tissue contains at least one photo-active molecular agent. The method includes the steps of treating the particular volume of the plant or animal tissue with light sufficient to promote a simultaneous two-photon excitation of the photo-active molecular agent contained in the particular volume of the plant or animal tissue, photo-activating at least one of the at least one photo-active molecular agent in the particular volume of the plant or animal tissue, thereby producing at least one photo-activated molecular agent, wherein the at least one photo-activated molecular agent emits energy, detecting the energy emitted by the at least one photo-activated molecular agent, and producing a detected energy signal which is characteristic of the particular volume of plant or animal tissue. The present invention is also a method for the imaging of a particular volume of material, wherein the material contains at least one photo-active molecular agent.

  9. SAGE, Summer of Applied Geophysical Experience

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

    Apply Who Qualifies Special Undergrad Information Contributors Faculty Past Programs Photo Gallery NSEC » CSES » SAGE SAGE, the Summer of Applied Geophysical Experience 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 Email SAGE Class of 2016 SAGE 2016

  10. Photo-Seebeck effect in tetragonal PbO single crystals

    SciTech Connect (OSTI)

    Mondal, P. S.; Okazaki, R.; Taniguchi, H.; Terasaki, I.

    2013-11-07

    We report the observation of photo-Seebeck effect in tetragonal PbO crystals. The photo-induced carriers contribute to the transport phenomena, and consequently the electrical conductivity increases and the Seebeck coefficient decreases with increasing photon flux density. A parallel-circuit model is used to evaluate the actual contributions of photo-excited carriers from the measured transport data. The photo-induced carrier concentration estimated from the Seebeck coefficient increases almost linearly with increasing photon flux density, indicating a successful photo-doping effect on the thermoelectric property. The mobility decreases by illumination but the reduction rate strongly depends on the illuminated photon energy. Possible mechanisms of such photon-energy-dependent mobility are discussed.

  11. Jefferson Lab experiment works to clarify Real Compton Scattering |

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

    Jefferson Lab experiment works to clarify Real Compton Scattering Real Compton Scattering experiment spokespeople The Real Compton Scattering experiment spokespeople take a short break for a photo. From left is Bogdan Wojtsekhowski, JLab staff scientist; Charles Hyde-Wright, physics professor at Old Dominion University; and Alan Nathan, physics professor at the University of Illinois and chair of the JLab Users Group. Jefferson Lab experiment works to clarify Real Compton Scattering January

  12. Low cost anti-soiling coatings for CSP collector mirrors and heliostats

    SciTech Connect (OSTI)

    Smith, Barton Barton; Polyzos, Georgios; Schaeffer, Daniel A; Lee, Dominic F; Datskos, Panos G

    2014-01-01

    Most concentrating solar power (CSP) facilities in the USA are located in the desert southwest of the country where land and sunshine are abundant. But one of the significant maintenance problems and cost associated with operating CSP facilities in this region is the accumulation of dust, sand and other pollutants on the collector mirrors and heliostats. In this paper we describe the development of low cost, easy to apply anti-soiling coatings based on superhydrophobic (SH) functionalized nano silica materials and polymer binders that posses the key requirements necessary to inhibit particulate deposition on and sticking to CSP mirror surfaces, and thereby significantly reducing mirror cleaning costs and facility downtime.

  13. One-way acoustic mirror based on anisotropic zero-index media

    SciTech Connect (OSTI)

    Gu, Zhong-ming; Liang, Bin E-mail: jccheng@nju.edu.cn; Yang, Jing; Cheng, Jian-chun E-mail: jccheng@nju.edu.cn; Zou, Xin-ye; Li, Yong; Yang, Jun

    2015-11-23

    We have designed a one-way acoustic mirror comprising anisotropic zero-index media. For acoustic beam incident at a particular angle, the designed structure behaves like a high-efficient mirror that redirects almost all the incident energy into another direction predicted by the Snell's law, while becoming virtually transparent to beams propagating reversely along this output path. Furthermore, the mirror can be tailored to work at arbitrary incident angle by simply adjusting its geometry. Our design, with undirectional reflection functionality and flexible working angle, may offer possibilities in space isolations and have deep implication in various scenarios like ultrasound imaging or noise control.

  14. Transport and equilibrium in field-reversed mirrors

    SciTech Connect (OSTI)

    Boyd, J.K.

    1982-09-01

    Two plasma models relevant to compact torus research have been developed to study transport and equilibrium in field reversed mirrors. In the first model for small Larmor radius and large collision frequency, the plasma is described as an adiabatic hydromagnetic fluid. In the second model for large Larmor radius and small collision frequency, a kinetic theory description has been developed. Various aspects of the two models have been studied in five computer codes ADB, AV, NEO, OHK, RES. The ADB code computes two dimensional equilibrium and one dimensional transport in a flux coordinate. The AV code calculates orbit average integrals in a harmonic oscillator potential. The NEO code follows particle trajectories in a Hill's vortex magnetic field to study stochasticity, invariants of the motion, and orbit average formulas. The OHK code displays analytic psi(r), B/sub Z/(r), phi(r), E/sub r/(r) formulas developed for the kinetic theory description. The RES code calculates resonance curves to consider overlap regions relevant to stochastic orbit behavior.

  15. PPPL's Christopher Cane Has Winning Photo In Art of Science Competition |

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

    Princeton Plasma Physics Lab PPPL's Christopher Cane Has Winning Photo In Art of Science Competition By Jeanne Jackson DeVoe May 20, 2013 Tweet Widget Google Plus One Share on Facebook PPPL Webmaster Chris Cane and Paul Csogi, former Webmaster for the Lewis Center for the Arts, came up with this design depicting their two websites. PPPL's website is at the top left. (Photo by Photo courtesy of Art of Science ) PPPL Webmaster Chris Cane and Paul Csogi, former Webmaster for the Lewis Center

  16. Realizing novel accelerator concepts in an X-band photo-injector

    SciTech Connect (OSTI)

    Marsh, R

    2010-04-13

    In this project we propose to investigate the use of novel accelerator structure cell geometry to enhance the performance of X-band photo-injectors. Making novel accelerator concepts possible involves fabrication and testing of components to ensure that the performance predicted by simulation is robustly achievable. This work is important because photo-injectors are increasingly used to provide high brightness electron beams for light sources, pushing their performance to the limits, but also requiring them to be user-facility stable. Careful investigation in both computer simulation and design, and low power testing of piece parts will enable the successful fabrication of an advanced X-band photo-injector.

  17. Photo of the Week: Record-Breaking Solar Cells | Department of Energy

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

    Record-Breaking Solar Cells Photo of the Week: Record-Breaking Solar Cells December 7, 2012 - 2:27pm Addthis Solar Junction, in partnership with NREL, has developed solar cells that reach a record-breaking 44 percent efficiency -- meaning that more than 40 percent of the sunlight the solar cells are exposed to is converted into electrical energy. In this photo, an operator inspects a photolithography tool used to manufacture these solar cells. | Photo by Daniel Derkacs/SolarJunction. Solar

  18. Photo of the Week: the 2014 Washington Auto Show | Department of Energy

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

    the 2014 Washington Auto Show Photo of the Week: the 2014 Washington Auto Show January 23, 2014 - 4:29pm Addthis This week, the latest vehicles technologies are on display at the Washington Auto Show in Washington, D.C. In this photo, Secretary Moniz looks at the fuel cell and motor used to power Hyundai’s Tucson fuel cell vehicle. Fuel cell vehicles use hydrogen to produce electricity, which powers an electric motor to make the vehicle and its accessories work. | Photo by Sarah Gerrity,

  19. New Horizons Science Photos from NASA's Pluto-Kuiper Belt Mission

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    DOE provided the power supply for NASA's New Horizons Mission, a mission to the Pluto and Charon, a double-planet system, and the Kuiper Belt. There are 61 science photos posted on the New Horizons website, along with mission photos, spacecraft images, launch photos, posters and renderings that are both scientific and artistic. Dates range from June of 2006 to February of 2008. The images can be searched by keywords, by date, or by subject topic. They can also be browsed as an entire list. Each image has a detailed description.

  20. Laser desorption time-of-flight mass spectrometry of ultraviolet photo-processed ices

    SciTech Connect (OSTI)

    Paardekooper, D. M. Bossa, J.-B.; Isokoski, K.; Linnartz, H.

    2014-10-01

    A new ultra-high vacuum experiment is described that allows studying photo-induced chemical processes in interstellar ice analogues. MATRICES - a Mass Analytical Tool to study Reactions in Interstellar ICES applies a new concept by combining laser desorption and time-of-flight mass spectrometry with the ultimate goal to characterize in situ and in real time the solid state evolution of organic compounds upon UV photolysis for astronomically relevant ice mixtures and temperatures. The performance of the experimental setup is demonstrated by the kinetic analysis of the different photoproducts of pure methane (CH?) ice at 20 K. A quantitative approach provides formation yields of several new species with up to four carbon atoms. Convincing evidence is found for the formation of even larger species. Typical mass resolutions obtained range from M/?M ~320 to ~400 for CH? and argon, respectively. Additional tests show that the typical detection limit (in monolayers) is ?0.02 ML, substantially more sensitive than the regular techniques used to investigate chemical processes in interstellar ices.

  1. Workshop on hadron structure from photo-reactions at intermediate energies: Proceedings

    SciTech Connect (OSTI)

    Nathan, A.M.; Sandorfi, A.M.

    1992-10-01

    This report contains papers on the following topics: The proton compton effect: Recent measurements of the electric and magnetic polorizabilities of the proton; experiments on the electric polarizability of the neutron; chiral symmetry and nucleon polarizabilities; chiral model predictions for electromagnetic polarizabilities of the nucleon, a consumer report; the polarizabilities of bound nucleons; nucleon polarizability in free space and in nuclear matter; mechanisms of photon scattering on nucleons at intermediate energies; pion polarizabilities in chiral perturbation theory; pion polarizabilities and the shielding of {sigma}(700)-meson exchange in {gamma}{gamma}{yields}{pi}{pi} processes; pion and kaon polarizabilities in the quark confinement model; radiative pion photoproduction and pion polarizabilities; pion and sigma polarizabilities and radiative transitions; the quadrupole amplitude in the {gamma}{Nu}-{Delta} transition; pion photoproduction and the {gamma}{Nu}-{Delta} amplitudes; effective- lagrangians, Watson`s theorem, and the E2/M1 mixing ratio in the excitation of the delta resonance; new measurements of the p({rvec {gamma}}, {pi}{sup o}) reaction; multipole analyses and photo-decay couplings at intermediate energies; compton scattering off the proton; connections between compton scattering and pion photoproduction in the delta region; single-pion electroproduction and the transverse one-half and scalar helicity transition form factors; relativistic effects, QCD mixing angles, and {Nu} {yields} {Nu}{gamma} and {Delta} {yields} {gamma}{Nu} transition form factors; electroproduction studies of the {Nu} {yields} {Delta} transition at bates and CEBAF.

  2. Stimulated Brillouin scattering mirror system, high power laser and laser peening method and system using same

    DOE Patents [OSTI]

    Dane, C. Brent; Hackel, Lloyd; Harris, Fritz B.

    2007-04-24

    A laser system, such as a master oscillator/power amplifier system, comprises a gain medium and a stimulated Brillouin scattering SBS mirror system. The SBS mirror system includes an in situ filtered SBS medium that comprises a compound having a small negative non-linear index of refraction, such as a perfluoro compound. An SBS relay telescope having a telescope focal point includes a baffle at the telescope focal point which blocks off angle beams. A beam splitter is placed between the SBS mirror system and the SBS relay telescope, directing a fraction of the beam to an alternate beam path for an alignment fiducial. The SBS mirror system has a collimated SBS cell and a focused SBS cell. An adjustable attenuator is placed between the collimated SBS cell and the focused SBS cell, by which pulse width of the reflected beam can be adjusted.

  3. Method for pulse control in a laser including a stimulated brillouin scattering mirror system

    DOE Patents [OSTI]

    Dane, C. Brent; Hackel, Lloyd; Harris, Fritz B.

    2007-10-23

    A laser system, such as a master oscillator/power amplifier system, comprises a gain medium and a stimulated Brillouin scattering SBS mirror system. The SBS mirror system includes an in situ filtered SBS medium that comprises a compound having a small negative non-linear index of refraction, such as a perfluoro compound. An SBS relay telescope having a telescope focal point includes a baffle at the telescope focal point which blocks off angle beams. A beam splitter is placed between the SBS mirror system and the SBS relay telescope, directing a fraction of the beam to an alternate beam path for an alignment fiducial. The SBS mirror system has a collimated SBS cell and a focused SBS cell. An adjustable attenuator is placed between the collimated SBS cell and the focused SBS cell, by which pulse width of the reflected beam can be adjusted.

  4. Synfuels from fusion: producing hydrogen with the Tandem Mirror Reactor and thermochemical cycles

    SciTech Connect (OSTI)

    Werner, R.W.; Ribe, F.L.

    1981-01-21

    This volume contains the following sections: (1) the Tandem Mirror fusion driver, (2) the Cauldron blanket module, (3) the flowing microsphere, (4) coupling the reactor to the process, (5) the thermochemical cycles, and (6) chemical reactors and process units. (MOW)

  5. Anisotropy and crystal orientation of silicon--application to the modeling of a bent mirror

    SciTech Connect (OSTI)

    Zhang Lin

    2010-06-23

    Matrix formula and MATLAB algorithm are proposed to calculate the stiffness coefficient matrix C, the Young's modulus, shear modulus and Poisson ratio for the silicon crystal in any orientation. Results for Si(110) and Si(311) are given as an example. The anisotropic material properties of the silicon have been used in the mirror width profile optimization for the nano-imaging end-station ID22NI at the ESRF. As the Si(110) is used as the substrate of this multilayer coated KB mirror, the silicon crystal axis [0 0 1] is proposed to orient to the mirror axis. This is the case to have low stress in the mirror and low bending forces from actuators.

  6. Closely spaced mirror pair for reshaping and homogenizing pump beams in laser amplifiers

    SciTech Connect (OSTI)

    Bass, I.L.

    1992-12-01

    Channeling a laser beam by multiple reflections between two closely-spaced, parallel or nearly parallel mirrors, serves to reshape and homogenize the beam at the output gap between the mirrors. Application of this device to improve the spatial overlap of a copper laser pump beam with the signal beam in a dye laser amplifier is described. This technique has been applied to the AVLIS program at the Lawrence Livermore National Laboratory.

  7. Amazing Mirrors and Superlative Supercomputers | U.S. DOE Office of Science

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

    (SC) Amazing Mirrors and Superlative Supercomputers News News Home Featured Articles 2016 2015 2014 2013 2012 2011 2010 2009 2008 2007 2006 2005 Science Headlines Science Highlights Presentations & Testimony News Archives Communications and Public Affairs Contact Information Office of Science U.S. Department of Energy 1000 Independence Ave., SW Washington, DC 20585 P: (202) 586-5430 11.29.11 Amazing Mirrors and Superlative Supercomputers Argonne's Mira will accelerate scientific

  8. Students try out PPPL plasma physics experiment that can be accessed from

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

    anywhere in the world | Princeton Plasma Physics Lab Students try out PPPL plasma physics experiment that can be accessed from anywhere in the world By Jeanne Jackson DeVoe March 13, 2014 Tweet Widget Google Plus One Share on Facebook Gallery: Students in an advanced physics class at West Windsor-Plainsboro High School South listen to Dominguez tell them about the RGDX. (Photo by Elle Starkman/PPPL Office of Communications) (Photo by Photo by Elle Starkman/PPPL Office of Communications)

  9. Development of polarization-controlled multi-pass Thomson scattering system in the GAMMA 10 tandem mirror

    SciTech Connect (OSTI)

    Yoshikawa, M.; Morimoto, M.; Shima, Y.; Kohagura, J.; Sakamoto, M.; Nakashima, Y.; Imai, T. [Plasma Research Center, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577 (Japan); Yasuhara, R.; Yamada, I.; Kawahata, K.; Funaba, H. [National Institute for Fusion Science, 322-6 Oroshi-cho, Toki, Gifu 509-5292 (Japan); Minami, T. [Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011 (Japan)

    2012-10-15

    In the GAMMA 10 tandem mirror, the typical electron density is comparable to that of the peripheral plasma of torus-type fusion devices. Therefore, an effective method to increase Thomson scattering (TS) signals is required in order to improve signal quality. In GAMMA 10, the yttrium-aluminum-garnet (YAG)-TS system comprises a laser, incident optics, light collection optics, signal detection electronics, and a data recording system. We have been developing a multi-pass TS method for a polarization-based system based on the GAMMA 10 YAG TS. To evaluate the effectiveness of the polarization-based configuration, the multi-pass system was installed in the GAMMA 10 YAG-TS system, which is capable of double-pass scattering. We carried out a Rayleigh scattering experiment and applied this double-pass scattering system to the GAMMA 10 plasma. The integrated scattering signal was made about twice as large by the double-pass system.

  10. Photo of the Week: Mapping the Link between Invasive Plants and...

    Office of Environmental Management (EM)

    Mapping the Link between Invasive Plants and Wildfire in the Mojave Desert Photo of the Week: Mapping the Link between Invasive Plants and Wildfire in the Mojave Desert August 21, ...

  11. Photo Library of the Nevada Site Office (Includes historical archive of nuclear testing images)

    DOE Data Explorer [Office of Scientific and Technical Information (OSTI)]

    The Nevada Site Office makes available publicly released photos from their archive that includes photos from both current programs and historical activities. The historical collections include atmospheric and underground nuclear testing photos and photos of other events and people related to the Nevada Test Site. Current collections are focused on homeland security, stockpile stewardship, and environmental management and restoration. See also the Historical Film Library at http://www.nv.doe.gov/library/films/testfilms.aspx and the Current Film Library at http://www.nv.doe.gov/library/films/current.aspx. Current films can be viewed online, but only short clips of the historical films are viewable. They can be ordered via an online request form for a very small shipping and handling fee.

  12. Photo-oxidation of Polymers Synthesized by Plasma and Initiated CVD

    SciTech Connect (OSTI)

    Baxamusa, Salmaan H.; Suresh, Aravind; Ehrmann, Paul; Laurence, Ted; Hanania, Jiries; Hayes, Jeff; Harley, Stephen; Burkey, Daniel D.

    2015-11-09

    Plasma polymers are often limited by their susceptibility to spontaneous and photo-oxidation. We show that the unusual photoluminescence (PL) behavior of a plasma polymer of trans-2-butene is correlated with its photoluminescence strength. These photo-processes occur under blue light illumination (λ=405 nm), distinguishing them from traditional ultraviolet degradation of polymers. These photo-active defects are likely formed during the plasma deposition process and we show that a polymer synthesized using initiated (i)CVD, non-plasma method, has 1000× lower PL signal and enhanced photo-stability. In conclusion, non-plasma methods such as iCVD may therefore be a route to overcoming material aging issues that limit the adoption of plasma polymers.

  13. Photo-oxidation of Polymers Synthesized by Plasma and Initiated CVD

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

    Baxamusa, Salmaan H.; Suresh, Aravind; Ehrmann, Paul; Laurence, Ted; Hanania, Jiries; Hayes, Jeff; Harley, Stephen; Burkey, Daniel D.

    2015-11-09

    Plasma polymers are often limited by their susceptibility to spontaneous and photo-oxidation. We show that the unusual photoluminescence (PL) behavior of a plasma polymer of trans-2-butene is correlated with its photoluminescence strength. These photo-processes occur under blue light illumination (λ=405 nm), distinguishing them from traditional ultraviolet degradation of polymers. These photo-active defects are likely formed during the plasma deposition process and we show that a polymer synthesized using initiated (i)CVD, non-plasma method, has 1000× lower PL signal and enhanced photo-stability. In conclusion, non-plasma methods such as iCVD may therefore be a route to overcoming material aging issues that limit themore » adoption of plasma polymers.« less

  14. Photo of the Week: Argonne's 10 kW Wind Turbine | Department...

    Office of Environmental Management (EM)

    Argonne's 10 kW Wind Turbine Photo of the Week: Argonne's 10 kW Wind Turbine November 9, 2012 - 11:57am Addthis At Argonne National Laboratory, the power generated by this 10 kW ...

  15. Final Scientific/Technical Report Development of Large-Area Photo...

    Office of Scientific and Technical Information (OSTI)

    Final ScientificTechnical Report Development of Large-Area Photo-Detectors Citation Details In-Document Search Title: Final ScientificTechnical Report Development of Large-Area...

  16. Photo of the Week: The Longest Building in the World | Department...

    Energy Savers [EERE]

    Sarah Gerrity Sarah Gerrity Former Multimedia Editor, Office of Public Affairs Every week, we'll feature our favorite energy-related photo here on Energy.gov, at Facebook.com...

  17. Photo of the Week: The First Energy-Efficient Dual-Paned Windows...

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

    Sarah Gerrity Sarah Gerrity Former Multimedia Editor, Office of Public Affairs Every week, we'll feature our favorite energy-related photo here on Energy.gov, at Facebook.com...

  18. Using the X-FEL as a source to investigate photo-pumped X-ray...

    Office of Scientific and Technical Information (OSTI)

    Title: Using the X-FEL as a source to investigate photo-pumped X-ray lasers Authors: Nilsen, J ; Scott, H A Publication Date: 2010-07-27 OSTI Identifier: 1119910 Report Number(s): ...

  19. Method for improved selectivity in photo-activation of molecular agents

    DOE Patents [OSTI]

    Fisher, Walter G.; Wachter, Eric A.; Dees, H. Craig

    2000-01-01

    An apparatus for the treatment of a particular volume of plant or animal tissue by treating the plant or animal tissue with at least one photo-active molecular agent, wherein the particular volume of the plant or animal tissue retains at least a portion of the at least one photo-active molecular agent, and then treating the particular volume of the plant or animal tissue with light sufficient to promote a simultaneous two-photon excitation of at least one of the at least one photo-active molecular agent retained in the particular volume of the plant or animal tissue, wherein the at least one photo-active molecular agent becomes active in the particular volume of the plant or animal tissue.

  20. Ultrafast spin exchange-coupling torque via photo-excited charge...

    Office of Scientific and Technical Information (OSTI)

    Title: Ultrafast spin exchange-coupling torque via photo-excited charge-transfer processes In this study, optical control of spin is of central importance in the research of ...

  1. 2010 National Science Bowl Photos | U.S. DOE Office of Science (SC)

    Office of Science (SC) Website

    0 National Science Bowl Photos National Science Bowl® (NSB) NSB Home About Regional Science Bowl Coordinators Alumni Historical Information - National Finals National Science Bowl Logos Regional Competitions National Finals Volunteers Key Dates Frequently Asked Questions News Media Contact Us WDTS Home Contact Information National Science Bowl® U.S. Department of Energy SC-27/ Forrestal Building 1000 Independence Ave., SW Washington, DC 20585 E: Email Us Past National Science Bowl Photos and

  2. 2011 National Science Bowl Photos | U.S. DOE Office of Science (SC)

    Office of Science (SC) Website

    1 National Science Bowl Photos National Science Bowl® (NSB) NSB Home About Regional Science Bowl Coordinators Alumni Historical Information - National Finals National Science Bowl Logos Regional Competitions National Finals Volunteers Key Dates Frequently Asked Questions News Media Contact Us WDTS Home Contact Information National Science Bowl® U.S. Department of Energy SC-27/ Forrestal Building 1000 Independence Ave., SW Washington, DC 20585 E: Email Us Past National Science Bowl Photos and

  3. Photo-oxidation of polymer-like amorphous hydrogenated carbon under visible light illumination

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

    Baxamusa, Salmaan; Laurence, Ted; Worthington, Matthew; Ehrmann, Paul

    2015-11-10

    Amorphous hydrogenated carbon (a-C:H), a polymer-like network typically synthesized by plasma chemical vapor deposition, has long been understood to exhibit optical absorption of visible light (? > 400 nm). In this report we explain that this absorption is accompanied by rapid photo-oxidation (within minutes) that behaves in most respects like classic polymer photo-oxidation with the exception that it occurs under visible light illumination rather than ultraviolet illumination.

  4. Photo of the Week: Throwback Thursday with AVIDAC | Department of Energy

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

    Throwback Thursday with AVIDAC Photo of the Week: Throwback Thursday with AVIDAC September 19, 2013 - 4:41pm Addthis In this photo, two Argonne researchers are pictured with Argonne's first digital computer, AVIDAC. Designed and built by Argonne's Physics Division for $250,000, it began operations on January 28, 1953. AVIDAC stands for "Argonne Version of the Institute's Digital Automatic Computer" and was based on architecture developed by mathematician John von Neumann.

  5. Resonantly photo-pumped nickel-like erbium X-ray laser

    DOE Patents [OSTI]

    Nilsen, Joseph

    1990-01-01

    A resonantly photo-pumped X-ray laser (10) that enhances the gain of seve laser lines that also lase because of collisional excitations and recombination processes, is described. The laser comprises an aluminum (12) and erbium (14) foil combination (16) that is driven by two beams (18, 20) of intense line focused (22, 24) optical laser radiation. Ground state nickel-like erbium ions (34) are resonantly photo-pumped by line emission from hydrogen-like aluminum ions (32).

  6. Photo-oxidation of polymer-like amorphous hydrogenated carbon under visible light illumination

    SciTech Connect (OSTI)

    Baxamusa, Salmaan; Laurence, Ted; Worthington, Matthew; Ehrmann, Paul

    2015-11-10

    Amorphous hydrogenated carbon (a-C:H), a polymer-like network typically synthesized by plasma chemical vapor deposition, has long been understood to exhibit optical absorption of visible light (λ > 400 nm). In this report we explain that this absorption is accompanied by rapid photo-oxidation (within minutes) that behaves in most respects like classic polymer photo-oxidation with the exception that it occurs under visible light illumination rather than ultraviolet illumination.

  7. Experiment of Fundamental ECRH in the GAMMA 10 Central Cell

    SciTech Connect (OSTI)

    Tatematsu, Y. [Plasma Research Center, University of Tsukuba (Japan); Saito, T. [Plasma Research Center, University of Tsukuba (Japan); Ikegami, H. [Plasma Research Center, University of Tsukuba (Japan); Sekine, T. [Plasma Research Center, University of Tsukuba (Japan); Nagai, D. [Plasma Research Center, University of Tsukuba (Japan); Nozaki, K. [Plasma Research Center, University of Tsukuba (Japan); Ishii, K. [Plasma Research Center, University of Tsukuba (Japan); Kohagura, J. [Plasma Research Center, University of Tsukuba (Japan); Nakashima, Y. [Plasma Research Center, University of Tsukuba (Japan); Kubo, S. [National Institute for Fusion Science (Japan); Shimozuma, T. [National Institute for Fusion Science (Japan); Cho, T. [Plasma Research Center, University of Tsukuba (Japan)

    2005-01-15

    As an improvement of the central-cell ECRH (C-ECRH) system in GAMMA 10, an ellipsoidal mirror was installed instead of a cylindrical mirror. With this replacement, the microwave beam for ECRH is converged to the GAMMA 10 axis on the resonance surface and Poynting flux reaching the plasma core region becomes about five times larger than the previous one. Effectiveness of this system has been shown in the initial stage of experiment. Finite increment of soft X-ray signal during ECRH operation indicates an increase of the electron temperature. As more improvement, designing a new antenna is now under way.

  8. Soft x-ray intensity profile measurements of electron cyclotron heated plasmas using semiconductor detector arrays in GAMMA 10 tandem mirror

    SciTech Connect (OSTI)

    Minami, R., E-mail: minami@prc.tsukuba.ac.jp; Imai, T.; Kariya, T.; Numakura, T.; Eguchi, T.; Kawarasaki, R.; Nakazawa, K.; Kato, T.; Sato, F.; Nanzai, H.; Uehara, M.; Endo, Y.; Ichimura, M. [Plasma Research Center, University of Tsukuba, Tsukuba, Ibaraki 305-8577 (Japan)

    2014-11-15

    Temporally and spatially resolved soft x-ray analyses of electron cyclotron heated plasmas are carried out by using semiconductor detector arrays in the GAMMA 10 tandem mirror. The detector array has 16-channel for the measurements of plasma x-ray profiles so as to make x-ray tomographic reconstructions. The characteristics of the detector array make it possible to obtain spatially resolved plasma electron temperatures down to a few tens eV and investigate various magnetohydrodynamic activities. High power electron cyclotron heating experiment for the central-cell region in GAMMA 10 has been started in order to reduce the electron drag by increasing the electron temperature.

  9. Prototype secondary mirror assembly design for the space infrared telescope facility

    SciTech Connect (OSTI)

    Stier, M.; Duffy, M.; Gullapalli, S.; Rockwell, R.; Sileo, F.; Krim, M.

    1989-02-01

    The authors describe their design of a liquid helium temperature prototype secondary mirror assembly (PSMA) under development for the NASA Space Infrared Telescope Facility (SIRTF) program. The SIRTF secondary mirror assembly must operate below 4 K and provide the functions of highly precise 2-axis dynamic tilting (chopping) in addition to the conventional functions needed by the SIRTF observatory. Their PSMA design employs a fused quartz mirror kinematically attached at its center to an aluminium cruciform. The mirror/cruciform assembly is driven in tilt about its combined center of mass using a unique flexure pivot and a four-actuator control system with feedback provided by pairs of differential position sensors. The voice coil actuators are mounted on a second flexure-pivoted mass enhancing servo system stability and isolating the telescope from vibration-induced disturbances. The mirror/cruciform and the reaction mass are attached to opposite sides of an aluminum mounting plate whose dimensional characteristics are nominally identical to that of the aluminum flexure pivot material. The mounting plate is connected to the outer housing by a six degree of freedom focus and centering mechanism using pivoted actuation levers driven by lead screw/harmonic drive/stepper motor assemblies.

  10. DABAM: An open-source database of X-ray mirrors metrology

    SciTech Connect (OSTI)

    Sanchez del Rio, Manuel; Bianchi, Davide; Cocco, Daniele; Glass, Mark; Idir, Mourad; Metz, Jim; Raimondi, Lorenzo; Rebuffi, Luca; Reininger, Ruben; Shi, Xianbo; Siewert, Frank; Spielmann-Jaeggi, Sibylle; Takacs, Peter; Tomasset, Muriel; Tonnessen, Tom; Vivo, Amparo; Yashchuk, Valeriy

    2016-01-01

    An open-source database containing metrology data for X-ray mirrors is presented. It makes available metrology data (mirror heights and slopes profiles) that can be used with simulation tools for calculating the effects of optical surface errors in the performances of an optical instrument, such as a synchrotron beamline. A typical case is the degradation of the intensity profile at the focal position in a beamline due to mirror surface errors. This database for metrology (DABAM) aims to provide to the users of simulation tools the data of real mirrors. The data included in the database are described in this paper, with details of how the mirror parameters are stored. An accompanying software is provided to allow simple access and processing of these data, calculate the most usual statistical parameters, and also include the option of creating input files for most used simulation codes. In conclusion, some optics simulations are presented and discussed to illustrate the real use of the profiles from the database.

  11. DABAM: An open-source database of X-ray mirrors metrology

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

    Sanchez del Rio, Manuel; Bianchi, Davide; Cocco, Daniele; Glass, Mark; Idir, Mourad; Metz, Jim; Raimondi, Lorenzo; Rebuffi, Luca; Reininger, Ruben; Shi, Xianbo; et al

    2016-01-01

    An open-source database containing metrology data for X-ray mirrors is presented. It makes available metrology data (mirror heights and slopes profiles) that can be used with simulation tools for calculating the effects of optical surface errors in the performances of an optical instrument, such as a synchrotron beamline. A typical case is the degradation of the intensity profile at the focal position in a beamline due to mirror surface errors. This database for metrology (DABAM) aims to provide to the users of simulation tools the data of real mirrors. The data included in the database are described in this paper,more » with details of how the mirror parameters are stored. An accompanying software is provided to allow simple access and processing of these data, calculate the most usual statistical parameters, and also include the option of creating input files for most used simulation codes. In conclusion, some optics simulations are presented and discussed to illustrate the real use of the profiles from the database.« less

  12. Fusion neutron generation computations in a stellarator-mirror hybrid with neutral beam injection

    SciTech Connect (OSTI)

    Moiseenko, V. E.; Agren, O.

    2012-06-19

    In the paper [Moiseenko V.E., Noack K., Agren O. 'Stellarator-mirror based fusion driven fission reactor' J Fusion Energy 29 (2010) 65.], a version of a fusion driven system (FDS), i.e. a sub-critical fast fission assembly with a fusion plasma neutron source, is proposed. The plasma part of the reactor is based on a stellarator with a small mirror part. Hot ions with high perpendicular energy are assumed to be trapped in the magnetic mirror part. The stellarator part which connects to the mirror part and provides confinement for the bulk (deuterium) plasma. In the magnetic well of the mirror part, fusion reactions occur from collisions between a of hot ion component (tritium) with cold background plasma ions. RF heating is one option to heat the tritium. A more conventional method to sustain the hot ions is neutral beam injection (NBI), which is here studied numerically for the above-mentioned hybrid scheme. For these studies, a new kinetic code, KNBIM, has been developed. The code takes into account Coulomb collisions between the hot ions and the background plasma. The geometry of the confining magnetic field is arbitrary for the code. It is accounted for via a numerical bounce averaging procedure. Along with the kinetic calculations the neutron generation intensity and its spatial distribution are computed.

  13. The role of atropisomers on the photo-reactivity and fatigue of diarylethene-based metal–organic frameworks

    SciTech Connect (OSTI)

    Walton, Ian M.; Cox, Jordan M.; Benson, Cassidy A.; Patel, Dinesh G.; Chen, Yu-Sheng; Benedict, Jason B.

    2016-01-01

    Photo-responsive metal–organic frameworks (MOFs) are one example of light controlled smart materials for use in advanced sensors, data storage, actuators and molecular switches. Herein we show the design, synthesis and characterization of a photo-responsive linker that is subsequently reacted to yield MOF single crystals. The photo-responsive properties of the resulting UBMOF-2 arise from the photo-induced cyclization of the diarylethene moiety designed into the linker. Computational modeling to assess the relative energies of linker atropisomers reveals a large energetic barrier preventing facile interconversion between key species. The role of this barrier on the observed photo-induced fatigue provides useful insight into the development of advanced photo-responsive nanoporous materials.

  14. Method for improved selectivity in photo-activation of molecular agents

    DOE Patents [OSTI]

    Fisher, Walter G.; Wachter, Eric A.; Dees, H. Craig

    1999-01-01

    A method for the treatment of a particular volume of plant or animal tissue comprising the steps of treating the plant or animal tissue with at least one photo-active molecular agent, wherein the particular volume of the plant or animal tissue retains at least a portion of the at least one photo-active molecular agent, and then treating the particular volume of the plant or animal tissue with light sufficient to promote a simultaneous two-photon excitation of at least one of the at least one photo-active molecular agent retained in the particular volume of the plant or animal tissue, wherein the at least one photo-active molecular agent becomes active in the particular volume of the plant or animal tissue. There is also disclosed a method for the treatment of cancer in plant or animal tissue and a method for producing at least one photo-activated molecular agent in a particular volume of a material.

  15. Method for improved selectivity in photo-activation of molecular agents

    DOE Patents [OSTI]

    Fisher, W.G.; Wachter, E.A.; Dees, H.C.

    1998-11-03

    A method for the treatment of a particular volume of plant or animal tissue comprising the steps of treating the plant or animal tissue with at least one photo-active molecular agent, wherein the particular volume of the plant or animal tissue retains at least a portion of the at least one photo-active molecular agent, and then treating the particular volume of the plant or animal tissue with light sufficient to promote a simultaneous two-photon excitation of at least one of the at least one photo-active molecular agent retained in the particular volume of the plant or animal tissue, wherein the at least one photo-active molecular agent becomes active in the particular volume of the plant or animal tissue. There is also disclosed a method for the treatment of cancer in plant or animal tissue and a method for producing at least one photo-activated molecular agent in a particular volume of a material. 23 figs.

  16. Method for improved selectivity in photo-activation of molecular agents

    DOE Patents [OSTI]

    Fisher, Walter G.; Wachter, Eric A.; Dees, H. Craig

    1998-01-01

    A method for the treatment of a particular volume of plant or animal tissue comprising the steps of treating the plant or animal tissue with at least one photo-active molecular agent, wherein the particular volume of the plant or animal tissue retains at least a portion of the at least one photo-active molecular agent, and then treating the particular volume of the plant or animal tissue with light sufficient to promote a simultaneous two-photon excitation of at least one of the at least one photo-active molecular agent retained in the particular volume of the plant or animal tissue, wherein the at least one photo-active molecular agent becomes active in the particular volume of the plant or animal tissue. There is also disclosed a method for the treatment of cancer in plant or animal tissue and a method for producing at least one photo-activated molecular agent in a particular volume of a material.

  17. System and method for online inspection of turbines using an optical tube with broadspectrum mirrors

    SciTech Connect (OSTI)

    Baleine, Erwan

    2015-12-22

    An optical inspection system for nondestructive internal visual inspection and non-contact infra-red (IR) temperature monitoring of an online, operating power generation turbine. The optical inspection system includes an optical tube having a viewing port, at least one reflective mirror or a mirror array having a reflectivity spectral range from 550 nm to 20 .mu.m, and capable of continuous operation at temperatures greater than 932 degrees Fahrenheit (500 degrees Celsius), and a transparent window with high transmission within the same spectral range mounted distal the viewing port. The same optical mirror array may be used to measure selectively surface temperature of metal turbine blades in the near IR range (approximately 1 .mu.m wavelength) and of thermal barrier coated turbine blades in the long IR range (approximately 10 .mu.m wavelength).

  18. Method of bonding silver to glass and mirrors produced according to this method

    DOE Patents [OSTI]

    Pitts, J.R.; Thomas, T.M.; Czanderna, A.W.

    1984-07-31

    A method for adhering silver to a glass substrate for producing mirrors includes attaining a silicon enriched substrate surface by reducing the oxygen therein in a vacuum and then vacuum depositing a silver layer onto the silicon enriched surface. The silicon enrichment can be attained by electron beam bombardment, ion beam bombardment, or neutral beam bombardment. It can also be attained by depositing a metal, such as aluminum, on the substrate surface, allowing the metal to oxidize by pulling oxygen from the substrate surface, thereby leaving a silicon enriched surface, and then etching or eroding the metal oxide layer away to expose the silicon enriched surface. Ultraviolet rays can be used to maintain dangling silicon bonds on the enriched surface until covalent bonding with the silver can occur. This disclosure also includes encapsulated mirrors with diffusion layers built therein. One of these mirrors is assembled on a polymer substrate.

  19. Method of bonding silver to glass and mirrors produced according to this method

    DOE Patents [OSTI]

    Pitts, John R.; Thomas, Terence M.; Czanderna, Alvin W.

    1985-01-01

    A method for adhering silver to a glass substrate for producing mirrors includes attaining a silicon enriched substrate surface by reducing the oxygen therein in a vacuum and then vacuum depositing a silver layer onto the silicon enriched surface. The silicon enrichment can be attained by electron beam bombardment, ion beam bombardment, or neutral beam bombardment. It can also be attained by depositing a metal, such as aluminum, on the substrate surface, allowing the metal to oxidize by pulling oxygen from the substrate surface, thereby leaving a silicon enriched surface, and then etching or eroding the metal oxide layer away to expose the silicon enriched surface. Ultraviolet rays can be used to maintain dangling silicon bonds on the enriched surface until covalent bonding with the silver can occur. This disclosure also includes encapsulated mirrors with diffusion layers built therein. One of these mirrors is assembled on a polymer substrate.

  20. Metrology for x-ray telescope mirrors in a vertical configuration

    SciTech Connect (OSTI)

    Li, Haizhang; Li, Xiaodan; Grindel, M.W.

    1995-09-01

    Mirrors used in x-ray telescope systems for observations outside of the earth`s atmosphere are usually made of several thin nested shells, each formed by a pair of paraboloidal and hyperboloidal surfaces. The thin shells are very susceptible to self-weight deflection caused by gravity and are nearly impossible to test by conventional interferometric techniques. The metrology requirements for these mirrors are extremely challenging. This paper presents a prototype of a Vertical Scanning Long Trace Profiler (VSLTP) which is optimized to measure the surface figure of x-ray telescope mirrors in a vertical orientation. The optical system of the VSLTP is described. Experimental results from measurements on an x-ray telescope mandrel and tests of the accuracy and repeatability of the prototype VSLTP are presented. The prototype instrument has achieved a height measurement accuracy of about 50 nanometers with a repeatability of better than 20 nanometers, and a slope measurement accuracy of about 1 microradian.

  1. Possibilities for Nuclear Photo-Science with Intense Lasers

    SciTech Connect (OSTI)

    Barty, C J; Hartemann, F V; McNabb, D P; Messerly, M; Siders, C; Anderson, S; Barnes, P; Betts, S; Gibson, D; Hagmann, C; Hernandez, J; Johnson, M; Jovanovic, I; Norman, R; Pruet, J; Rosenswieg, J; Shverdin, M; Tremaine, A

    2006-06-26

    The interaction of intense laser light with relativistic electrons can produce unique sources of high-energy x rays and gamma rays via Thomson scattering. ''Thomson-Radiated Extreme X-ray'' (T-REX) sources with peak photon brightness (photons per unit time per unit bandwidth per unit solid angle per unit area) that exceed that available from world's largest synchrotrons by more than 15 orders of magnitude are possible from optimally designed systems. Such sources offer the potential for development of ''nuclear photo-science'' applications in which the primary photon-atom interaction is with the nucleons and not the valence electrons. Applications include isotope-specific detection and imaging of materials, inverse density radiography, transmutation of nuclear waste and fundamental studies of nuclear structure. Because Thomson scattering cross sections are small, < 1 barn, the output from a T-REX source is optimized when the laser spot size and the electron spot size are minimized and when the electron and laser pulse durations are similar and short compared to the transit time through the focal region. The principle limitation to increased x-ray or gamma-ray brightness is ability to focus the electron beam. The effects of space charge on electron beam focus decrease approximately linearly with electron beam energy. For this reason, T-REX brightness increases rapidly as a function of the electron beam energy. As illustrated in Figure 1, above 100 keV these sources are unique in their ability to produce bright, narrow-beam, tunable, narrow-band gamma rays. New, intense, short-pulse, laser technologies for advanced T-REX sources are currently being developed at LLNL. The construction of a {approx}1 MeV-class machine with this technology is underway and will be used to excite nuclear resonance fluorescence in variety of materials. Nuclear resonance fluorescent spectra are unique signatures of each isotope and provide an ideal mechanism for identification of nuclear

  2. Fiber laser cleaning of metal mirror surfaces for optical diagnostic systems of the ITER

    SciTech Connect (OSTI)

    Kuznetsov, A. P. Alexandrova, A. S.; Buzhinsky, O. I.; Gubskiy, K. L.; Kazieva, T. V.; Savchenkov, A. V.; Tugarinov, S. N.

    2015-12-15

    The results of experimental studies into efficiency of removal of films with a complex composition from metal mirrors by pulsed fiber laser irradiation are presented. It is shown that the initial reflectivity of optical elements can be restored by the selection of modes of irradiation impacting the surface with the sputtered film. Effective cleaning is performed by radiation with a power density lower than 10{sup 7} W/cm{sup 2}. The removal of contaminations at such a relatively low power density occurs in a solid phase, owing to which the thermal effect on the mirror is insignificant.

  3. Demonstration of a plasma mirror based on a laminar flow water film

    SciTech Connect (OSTI)

    Panasenko, Dmitriy; Shu, Anthony; Gonsalves, Anthony; Nakamura, Kei; Matlis, Nicholas; Toth, Csaba; Leemans, Wim

    2011-07-22

    A plasma mirror based on a laminar water film with low flow speed 0.5-2 cm/s has been developed and characterized, for use as an ultrahigh intensity optical reflector. The use of flowing water as atarget surface automatically results in each laser pulse seeing a new interaction surface and avoids the need for mechanical scanning of the target surface. In addition, the breakdown of water does notproduce contaminating debris that can be deleterious to vacuum chamber conditions and optics, such as is the case when using conventional solid targets. The mirror exhibits 70percent reflectivity, whilemaintaining high-quality of the reflected spot.

  4. Demonstration of a plasma mirror based on a laminar flow water film

    SciTech Connect (OSTI)

    Panasenko, Dmitriy; Shu, Anthony J.; Gonsalves, Anthony; Nakamura, Kei; Matlis, Nicholas H.; Toth, Csaba; Leemans, Wim P. [Lawrence Berkeley National Laboratory, University of California, Berkeley, California 94720 (United States)

    2010-08-15

    A plasma mirror based on a laminar water film with low flow speed (0.5-2 cm/s) has been developed and characterized, for use as an ultrahigh intensity optical reflector. The use of flowing water as a target surface automatically results in each laser pulse seeing a new interaction surface and avoids the need for mechanical scanning of the target surface. In addition, the breakdown of water does not produce contaminating debris that can be deleterious to vacuum chamber conditions and optics, such as is the case when using conventional solid targets. The mirror exhibits 70% reflectivity, while maintaining high-quality of the reflected spot.

  5. Multilayer mirror with enhanced spectral selectivity for the next generation extreme ultraviolet lithography

    SciTech Connect (OSTI)

    Medvedev, V. V. Kruijs, R. W. E. van de; Yakshin, A. E.; Novikova, N. N.; Krivtsun, V. M.; Louis, E.; Bijkerk, F.; MESA Institute for Nanotechnology, University of Twente, P.O. Box 217, 7500 AE Enschede ; Yakunin, A. M.

    2013-11-25

    We have demonstrated a hybrid extreme ultraviolet (EUV) multilayer mirror for 6.x nm radiation that provides selective suppression for infrared (IR) radiation. The mirror consists of an IR-transparent LaN∕B multilayer stack which is used as EUV-reflective coating and antireflective (AR) coating to suppress IR. The AR coating can be optimized to suppress CO{sub 2} laser radiation at the wavelength of 10.6 μm, which is of interest for application in next-generation EUV lithography systems.

  6. Demonstration of achromatic cold-neutron microscope utilizing axisymmetric focusing mirrors

    SciTech Connect (OSTI)

    Liu, D.; Khaykovich, B. [Nuclear Reactor Laboratory, Massachusetts Institute of Technology, 138 Albany St., Cambridge, Massachusetts 02139 (United States)] [Nuclear Reactor Laboratory, Massachusetts Institute of Technology, 138 Albany St., Cambridge, Massachusetts 02139 (United States); Hussey, D.; Jacobson, D.; Arif, M. [Physical Measurement Laboratory, NIST, Gaithersburg, Maryland 20899-8461 (United States)] [Physical Measurement Laboratory, NIST, Gaithersburg, Maryland 20899-8461 (United States); Gubarev, M. V.; Ramsey, B. D. [Marshall Space Flight Center, NASA, VP62, Huntsville, Alabama 35812 (United States)] [Marshall Space Flight Center, NASA, VP62, Huntsville, Alabama 35812 (United States); Moncton, D. E. [Nuclear Reactor Laboratory, Massachusetts Institute of Technology, 138 Albany St., Cambridge, Massachusetts 02139 (United States) [Nuclear Reactor Laboratory, Massachusetts Institute of Technology, 138 Albany St., Cambridge, Massachusetts 02139 (United States); Department of Physics, Massachusetts Institute of Technology, 77 Massachusetts Ave., Cambridge, Massachusetts 02139 (United States)

    2013-05-06

    An achromatic cold-neutron microscope with magnification 4 is demonstrated. The image-forming optics is composed of nested coaxial mirrors of full figures of revolution, so-called Wolter optics. The spatial resolution, field of view, and depth of focus are measured and found consistent with ray-tracing simulations. Methods of increasing the resolution and magnification are discussed, as well as the scientific case for the neutron microscope. In contrast to traditional pinhole-camera neutron imaging, the resolution of the microscope is determined by the mirrors rather than by the collimation of the beam, leading to possible dramatic improvements in the signal rate and resolution.

  7. Project Profile: Advanced Anti-Soiling Coatings for CSP Collector Mirrors

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

    and Heliostats (SuNLaMP) | Department of Energy Project Profile: Advanced Anti-Soiling Coatings for CSP Collector Mirrors and Heliostats (SuNLaMP) Project Profile: Advanced Anti-Soiling Coatings for CSP Collector Mirrors and Heliostats (SuNLaMP) Funding Program: SuNLaMP SunShot Subprogram: CSP Location: Oak Ridge National Laboratory, Oak Ridge, TN SunShot Award Amount: $2,800,000 This project addresses the need to further develop self-cleaning reflector coatings for solar collectors. When

  8. High voltage photo-switch package module having encapsulation with profiled metallized concavities

    DOE Patents [OSTI]

    Sullivan, James S; Sanders, David M; Hawkins, Steven A; Sampayan, Stephen A

    2015-05-05

    A photo-conductive switch package module having a photo-conductive substrate or wafer with opposing electrode-interface surfaces metalized with first metallic layers formed thereon, and encapsulated with a dielectric encapsulation material such as for example epoxy. The first metallic layers are exposed through the encapsulation via encapsulation concavities which have a known contour profile, such as a Rogowski edge profile. Second metallic layers are then formed to line the concavities and come in contact with the first metal layer, to form profiled and metalized encapsulation concavities which mitigate enhancement points at the edges of electrodes matingly seated in the concavities. One or more optical waveguides may also be bonded to the substrate for coupling light into the photo-conductive wafer, with the encapsulation also encapsulating the waveguides.

  9. Large area InN terahertz emitters based on the lateral photo-Dember effect

    SciTech Connect (OSTI)

    Wallauer, Jan Grumber, Christian; Walther, Markus; Polyakov, Vladimir; Iannucci, Robert; Cimalla, Volker; Ambacher, Oliver

    2015-09-14

    Large area terahertz emitters based on the lateral photo-Dember effect in InN (indium nitride) are presented. The formation of lateral photo-Dember currents is induced by laser-illumination through a microstructured metal cover processed onto the InN substrate, causing an asymmetry in the lateral photogenerated charge carrier distribution. Our design uses simple metal structures, which are produced by conventional two-dimensional micro-structuring techniques. Having favoring properties as a photo-Dember material InN is particularly well-suited as a substrate for our emitters. We demonstrate that the emission intensity of the emitters can be significantly influenced by the structure of the metal cover leaving room for improvement by optimizing the masking structures.

  10. First-principles thermodynamic screening approach to photo-catalytic water splitting with co-catalysts

    SciTech Connect (OSTI)

    Oberhofer, Harald; Reuter, Karsten

    2013-07-28

    We adapt the computational hydrogen electrode approach to explicitly account for photo-generated charges and use it to computationally screen for viable catalyst/co-catalyst combinations for photo-catalytic water splitting. The hole energy necessary to thermodynamically drive the reaction is employed as descriptor for the screening process. Using this protocol and hybrid-level density-functional theory, we show that water oxidation on bare TiO{sub 2} surfaces is thermodynamically more complex than previously thought. This motivates a screening for suitable co-catalysts for this half-reaction, which we carry out for Au particles down to the non-scalable size regime. We find that almost all small Au clusters studied are better suited for water photo-oxidation than an extended Au(111) surface or bare TiO{sub 2} facets.

  11. Simultaneous effects of photo- and radio- darkening in ytterbium-doped aluminosilicate fibers

    SciTech Connect (OSTI)

    Duchez, Jean-Bernard Mady, Franck Mebrouk, Yasmine Benabdesselam, Mourad

    2014-10-21

    We present original characterizations of photo-radio-darkening in ytterbium-doped silica optical fibers submitted to the simultaneous action of the pump and of an ionizing radiation. We present the interplay between both radiations, showing e.g. that the pump is able to darken or bleach the fiber depending on the ionizing dose. The photo-resistance of the fiber is shown to play a crucial role on its radio-resistance, and that photo-resistant fibers should be also radio-resistant in low dose rate conditions. All the results are thoroughly explained by a physical model presented in a separate article by Mady et al. (this conference proceeding)

  12. Photo-induced refractive index and topographical surface gratings in functionalized nanocarbon solid film

    SciTech Connect (OSTI)

    McGee, David J.; Ferrie, John; Plachy, Aljoscha; Joo, Yongho; Choi, Jonathan; Kanimozhi, Catherine; Gopalan, Padma

    2015-11-02

    We demonstrate that a single-walled carbon nanotube network noncovalently coupled with a pyrene-modified azo-benzene chromophore functions as a host matrix for a broad range of photo-orientation and photomechanical effects. The chromophore could be efficiently reoriented through repeated trans-cis-trans isomerization under linearly polarized 480 nm light, with Δn of 0.012 at 650 nm and fast characteristic rise-times of 0.12 s. Erasable phase diffraction gratings could also be written, with permanent surface relief gratings forming at sufficiently long irradiation times. In addition to demonstrating a mechanism for photo-manipulation of single-walled carbon nanotubes, these results show photo-orientation of chromophores in azo-functionalized single-walled carbon nanotube networks as a path towards the photosensitive tuning of the electrostatic environment of the nanotube.

  13. UPDATED ADVISORY: Clean Energy Ministerial Photo Now at 11:15 AM |

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

    Department of Energy UPDATED ADVISORY: Clean Energy Ministerial Photo Now at 11:15 AM UPDATED ADVISORY: Clean Energy Ministerial Photo Now at 11:15 AM July 19, 2010 - 12:00am Addthis Washington, D.C. - U.S. Energy Secretary Steven Chu will host the first-ever Clean Energy Ministerial, bringing together ministers and stakeholders from more than 20 countries to launch or join new initiatives that will accelerate the world's transition to clean energy technologies. Government delegations will

  14. Enhanced photo-activated luminescence for screening polychlorobiphenyls (PCBs) and other related chlorinated compounds

    DOE Patents [OSTI]

    Tuan Vodinh.

    1993-12-21

    The presence of polychlorinated biphenyls and other chlorinated compounds in a sample is determined by treating the sample with a photo-activator and then exposing the treated sample to a UV light source. The UV light produces a photo-product complex, which is subsequently excited with UV light to cause luminescence of the complex. The luminescence is detected and characteristics of the luminescence spectra are used to determine the presence of chlorinated compounds and also the quantity of the chlorine in the compounds. 14 figures.

  15. Enhanced anomalous photo-absorption from TiO{sub 2} nanostructures

    SciTech Connect (OSTI)

    Solanki, Vanaraj; Majumder, Subrata; Mishra, Indrani; Varma, Shikha; Dash, P.; Singh, C.; Kanjilal, D.

    2014-03-28

    Two dimensional nanostructures have been created on the rutile TiO{sub 2} (110) surfaces via ion irradiation technique. Enhanced anomalous photo- absorption response is displayed, where nanostructures of 15?nm diameter with 0.5?nm height, and not the smaller nanostructures with larger surface area, delineate highest absorbance. Comprehensive investigations of oxygen vacancy states, on ion- irradiated surfaces, display a remarkable result that the number of vacancies saturates for higher fluences. A competition between the number of vacancy sites on the nanostructure in conjunction with its size is responsible for the observed anomalous photo-absorption.

  16. Photo Release: U.S. Energy Secretary Chu at BP Command Center in Houston |

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

    Department of Energy Release: U.S. Energy Secretary Chu at BP Command Center in Houston Photo Release: U.S. Energy Secretary Chu at BP Command Center in Houston May 28, 2010 - 12:00am Addthis Washington D.C. --- At the request of President Obama, U.S. Energy Secretary Steven Chu has been helping oversee BP's "top kill" efforts from the BP Command Center in Houston. Below are two photographs from this week. Photo credit: Department of Energy. Secretary Steven Chu and National

  17. Photo of the Week: Inside the 60-Inch Cyclotron | Department of Energy

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

    60-Inch Cyclotron Photo of the Week: Inside the 60-Inch Cyclotron January 25, 2013 - 11:45am Addthis In this 1939 photo, Eric and Margaret Lawrence are sitting inside the tank of something called the 60-inch cyclotron -- a machine invented by their father, Ernest Lawrence. The cyclotron is a unique circular particle accelerator, which Lawrence himself referred to as a "proton merry-go-round." In reality, the cyclotron specialized in smashing atoms. Fun facts: this cyclotron contains a

  18. Photo of the Week: LBNL Takes Over @Energy's Instagram! | Department of

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

    Energy LBNL Takes Over @Energy's Instagram! Photo of the Week: LBNL Takes Over @Energy's Instagram! May 15, 2014 - 3:16pm Addthis All day today, Lawrence Berkeley National Lab is taking over our Instagram account! Jeff Neaton, director of the Molecular Foundry at LBNL, will be posting photos to share what's happening over at Berkeley Lab. So far, he's posted some pretty amazing <a href="http://instagram.com/p/oBYVk0LTTF/" target="_blank">views of the San Francisco

  19. Photo of the Week: The CAVE at LANL | Department of Energy

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

    CAVE at LANL Photo of the Week: The CAVE at LANL March 20, 2014 - 2:53pm Addthis Over the past several years, Los Alamos National Laboratory has invested in providing state-of-the-art tools to help scientists understand and explore their data. In this photo, researchers are investigating the details of an astronomical simulation in the CAVE (cave automatic virtual environment) -- a cube-shaped room with high-resolution projections on all six surfaces. Using 3D glasses, these researchers can see

  20. Microsoft Word - Final Release of Two Photos and Captions for WIPP Exhibit Debut _2_.doc

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

    DOE- ###DRMMYY Photos of New WIPP Transportation Exhibit's Debut At the National Museum of Nuclear Science and History CARLSBAD, N.M., November 9, 2011- Photo #1 caption: A visitor takes a look at the new Waste Isolation Pilot Plant (WIPP) transportation exhibit that was unveiled November 5, 2011 in Albuquerque, N.M. at the National Museum of Nuclear Science and History. A cutaway of the TRUPACT-II, a transportation package used for shipping transuranic waste to WIPP near Carlsbad, N.M., is the

  1. 2014 SunShot Grand Challenge Summit Opening Session Photos | Department of

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

    Energy Opening Session Photos 2014 SunShot Grand Challenge Summit Opening Session Photos Addthis SunShot Grand Challenge Summit Opening Session 1 of 35 SunShot Grand Challenge Summit Opening Session Anaheim Mayor Tom Tait with SunShot Director Minh Le Credit: SunShot Initiative Date taken: 2014-05-19 16:01 SunShot Grand Challenge Summit Opening Session 2 of 35 SunShot Grand Challenge Summit Opening Session SunShot Director Minh Le Credit: SunShot Initiative Date taken: 2014-05-19 16:06

  2. Enhanced photo-activated luminescence for screening polychlorobiphenyls (PCBs) and other related chlorinated compounds

    DOE Patents [OSTI]

    Vo-Dinh, Tuan

    1993-01-01

    The presence of polychlorinated biphenyls and other chlorinated compounds in a sample is determined by treating the sample with a photo-activator and then exposing the treated sample to a UV light source. The UV light produces a photo-product complex, which is subsequently excited with UV light to cause luminescence of the complex. The luminescence is detected and characteristics of the luminescence spectra are used to determine the presence of chlorinated compounds and also the quantity of the chlorine in the compounds.

  3. Enhanced photo-activated luminescence for screening polychlorobiphenyls (PCBs) and other related chlorinated compounds

    DOE Patents [OSTI]

    Vo-Dinh, Tuan

    1994-01-01

    The presence of polychlorinated biphenyls and other chlorinated compounds in a sample is determined by treating the sample with a photo-activator and then exposing the treated sample to a UV light source. The UV light produces a photo-product complex, which is subsequently excited with UV light to cause luminescence of the complex. The luminescence is detected and characteristics of the luminescence spectra are used to determine the presence of chlorinated compounds and also the quantity of the chlorine in the compounds

  4. Enhanced photo-activated luminescence for screening polychlorobiphenyls (PCBs) and other related chlorinated compounds

    DOE Patents [OSTI]

    Vo-Dinh, T.

    1994-06-07

    The presence of polychlorinated biphenyls and other chlorinated compounds in a sample is determined by treating the sample with a photo-activator and then exposing the treated sample to a UV light source. The UV light produces a photo-product complex, which is subsequently excited with UV light to cause luminescence of the complex. The luminescence is detected and characteristics of the luminescence spectra are used to determine the presence of chlorinated compounds and also the quantity of the chlorine in the compounds. 14 figs.

  5. The Next Generation of Photo-Detectors for Particle Astrophysics

    SciTech Connect (OSTI)

    Wagner, Robert G.; Byrum, Karen L.; Sanchez, Mayly; Vaniachine, Alexandre V.; Siegmund, Oswald; Otte, Nepomuk A.; Ramberg, Erik; Hall, Jeter; Buckley, James

    2009-04-01

    We advocate support of research aimed at developing alternatives to the photomultiplier tube for photon detection in large astroparticle experiments such as gamma-ray and neutrino astronomy, and direct dark matter detectors. Specifically, we discuss the development of large area photocathode microchannel plate photomultipliers and silicon photomultipliers. Both technologies have the potential to exhibit improved photon detection efficiency compared to existing glass vacuum photomultiplier tubes.

  6. The next generation of photo-detector for particle astrophysics.

    SciTech Connect (OSTI)

    Wagner, R. G.; Byrum, K. L.; Sanchez, M.; Vaniachine, A. V.; Siegmund, O.; Otte, N.A.; Ramberg, E.; Hall, J.; Buckley, J.; High Energy Physics; Univ. of California at Berkeley; FNAL; Washington Univ.

    2009-06-02

    We advocate support of research aimed at developing alternatives to the photomultiplier tube for photon detection in large astroparticle experiments such as gamma-ray and neutrino astronomy, and direct dark matter detectors. Specifically, we discuss the development of large area photocathode microchannel plate photomultipliers and silicon photomultipliers. Both technologies have the potential to exhibit improved photon detection efficiency compared to existing glass vacuum photomultiplier tubes.

  7. Fast Steering Mirror systems for the U-AVLIS program at LLNL

    SciTech Connect (OSTI)

    Watson, J.; Avicola, K.; Payne, A.; Peterson, R.L.; Ward, R.

    1994-07-01

    We have successfully deployed several fast steering mirror systems in the Uranium Atomic Vapor Isotope Separation (U-AVLIS) facility at LLNL. These systems employ 2 mm to 150 mm optics and piezoelectric actuators to achieve microradian pointing accuracy with disturbance rejection bandwidths to a few hundred hertz.

  8. Optical and Durability Evaluation for Silvered Polymeric Mirrors and Reflectors: Cooperative Research and Development Final Report, CRADA Number, CRD-08-316

    SciTech Connect (OSTI)

    Gray, M.

    2014-08-01

    3M is currently developing silvered polymeric mirror reflectors as low-cost replacements for glass mirrors in concentrating solar power (CSP) systems. This effort is focused on development of reflectors comprising both metallized polymeric mirror films based on improved versions of ECP-305+ or other durable mirror film concepts and appropriate mechanically robust substrates. The objectives for this project are to reduce the system capital and operating costs and to lower the levelized cost of energy for CSP installations. The development of mirror reflectors involves work on both full reflectors and mirror films with and without coatings. Mirror reflectors must meet rigid optical specifications in terms of radius of curvature, slope errors and specularity. Mirror films must demonstrate long-term durability and maintain high reflectivity. 3M would like to augment internal capabilities to validate product performance with methods and tools developed at NREL to address these areas.

  9. Ultrafast gigantic photo-response in (EDO-TTF)2PF6 initiated by 10-fs laser pulses

    SciTech Connect (OSTI)

    Schoenlein, Robert William; Itatani, Jiro; Rini, Matteo; Cavalleri, Andrea; Onda, Ken; Ishikawa, Tadahiko; Koshihara, Shin-ya; Shao, Xiangfeng; Yamochi, Hideki; Saito, Gunzi; Schoenlein, Robert W.

    2006-08-07

    We photo-exited a charge-ordered organic salt (EDO-TTF)2PF6 with sub-10-fs optical pulses. The photo-induced metallic phase appeared within 80-fs after pumping, characterized by large changes in reflectivity (DELTA R/R~0.8) followed by strong coherent phonon modulation

  10. A method to quench and recharge avalanche photo diodes for use in high rate situations

    SciTech Connect (OSTI)

    Regan, T.O.; Fenker, H.C.; Thomas, J.; Oliver, J.

    1992-06-01

    We present a new method of using Avalanche Photo Diodes (APDS) for low level light detection in Geiger mode in high rate situations such as those encountered at the Superconducting Super Collider (SSC). The new technique is readily adaptable to implementation in CMOS VLSI.

  11. Photo-oxidative degradation of TiO{sub 2}/polypropylene films

    SciTech Connect (OSTI)

    Garca-Montelongo, X.L.; Martnez-de la Cruz, A.; Vzquez-Rodrguez, S.; Torres-Martnez, Leticia M.

    2014-03-01

    Graphical abstract: - Highlights: Photo-oxidative degradation of polypropylene is accelerated by TiO{sub 2} incorporation. Weight loss, FTIR, SEM and GPC shown high degree of degradation of polypropylene. A mechanism of the photo-degradation of polypropylene by TiO{sub 2} is proposed. - Abstract: Photo-oxidative degradation of polypropylene films with TiO{sub 2} nanoparticles incorporated was studied in a chamber of weathering with Xenon lamps as irradiation source. TiO{sub 2} powder with crystalline structure of anatase was synthesized by thermal treatments at 400 and 500 C starting from a precursor material obtained by solgel method. Composites of TiO{sub 2}/polypropylene were prepared with 0.1, 0.5 and 1.0 wt% of TiO{sub 2}. The mixture of components was performed using a twin screw extruder, the resulting material was pelletized by mechanical fragmenting and then hot-pressed in order to form polypropylene films with TiO{sub 2} dispersed homogeneously. Photo-oxidative degradation process was followed by visual inspection, weight loss of films, scanning electron microscopy (SEM), infrared spectroscopy with Fourier transformed (FTIR), and gel permeation chromatography (GPC)

  12. Design and Operation of A Setup with A Camera and Adjustable Mirror to Inspect the Sense-Wire Planes of the Time Projection Chamber Inside the MicroBooNE Cryostat

    SciTech Connect (OSTI)

    Carls, Benjamin; Horton-Smith, Glenn; James, Catherine C.; Kubinski, Robert M.; Pordes, Stephen; Schukraft, Anne; Strauss, Thomas

    2015-08-26

    Detectors in particle physics, particularly when including cryogenic components, are often enclosed in vessels that do not provide any physical or visual access to the detectors themselves after installation. However, it can be desirable for experiments to visually investigate the inside of the vessel. The MicroBooNE cryostat hosts a TPC with sense-wire planes, which had to be inspected for damage such as breakage or sagging. This inspection was performed after the transportation of the vessel with the enclosed detector to its final location, but before filling with liquid argon. Our paper describes an approach to view the inside of the MicroBooNE cryostat with a setup of a camera and a mirror through one of its cryogenic service nozzles. The paper also describes the camera and mirror chosen for the operation, the illumination, and the mechanical structure of the setup. It explains how the system was operated and demonstrates its performance.

  13. Photo-assisted etching of silicon in chlorine- and bromine-containing plasmas

    SciTech Connect (OSTI)

    Zhu, Weiye; Sridhar, Shyam; Liu, Lei; Hernandez, Eduardo; Donnelly, Vincent M. Economou, Demetre J.

    2014-05-28

    Cl{sub 2}, Br{sub 2}, HBr, Br{sub 2}/Cl{sub 2}, and HBr/Cl{sub 2} feed gases diluted in Ar (50%50% by volume) were used to study etching of p-type Si(100) in a rf inductively coupled, Faraday-shielded plasma, with a focus on the photo-assisted etching component. Etching rates were measured as a function of ion energy. Etching at ion energies below the threshold for ion-assisted etching was observed in all cases, with Br{sub 2}/Ar and HBr/Cl{sub 2}/Ar plasmas having the lowest and highest sub-threshold etching rates, respectively. Sub-threshold etching rates scaled with the product of surface halogen coverage (measured by X-ray photoelectron spectroscopy) and Ar emission intensity (7504?). Etching rates measured under MgF{sub 2}, quartz, and opaque windows showed that sub-threshold etching is due to photon-stimulated processes on the surface, with vacuum ultraviolet photons being much more effective than longer wavelengths. Scanning electron and atomic force microscopy revealed that photo-etched surfaces were very rough, quite likely due to the inability of the photo-assisted process to remove contaminants from the surface. Photo-assisted etching in Cl{sub 2}/Ar plasmas resulted in the formation of 4-sided pyramidal features with bases that formed an angle of 45 with respect to ?110? cleavage planes, suggesting that photo-assisted etching can be sensitive to crystal orientation.

  14. Generating end plug potentials in tandem mirror plasma confinement by heating thermal particles so as to escape low density end stoppering plasmas

    DOE Patents [OSTI]

    Baldwin, David E.; Logan, B. Grant

    1981-01-01

    The invention provides a method and apparatus for raising the potential of a magnetic mirror cell by pumping charged particles of the opposite sign of the potential desired out of the mirror cell through excitation, with the pumping being done by an externally imposed field at the bounce frequency of the above charged particles. These pumped simple mirror cells then provide end stoppering for a center mirror cell for the tandem mirror plasma confinement apparatus. For the substantially complete pumping case, the end plugs of a tandem mirror can be up to two orders of magnitude lower in density for confining a given center mirror cell plasma than in the case of end plugs without pumping. As a result the decrease in recirculating power required to keep the system going, the technological state of the art required, and the capital cost are all greatly lowered.

  15. Generating end plug potentials in tandem mirror plasma confinement by heating thermal particles so as to escape low density end stoppering plasmas

    DOE Patents [OSTI]

    Baldwin, D.E.; Logan, B.G.

    The invention provides a method and apparatus for raising the potential of a magnetic mirror cell by pumping charged particles of the opposite sign of the potential desired out of the mirror cell through excitation, with the pumping being done by an externally imposed field at the bounce frequence of the above charged particles. These pumped simple mirror cells then provide end stoppering for a center mirror cell for the tandem mirror plasma confinement apparatus. For the substantially complete pumping case, the end plugs of a tandem mirror can be up to two orders of magnitude lower in density for confining a given center mirror cell plasma than in the case of end plugs without pumping. As a result the decrease in recirculating power required to keep the system going, the technical state of the art required, and the capital cost are all greatly lowered.

  16. Some new schemes for producing high-accuracy elliptical X-ray mirrors by elastic bending

    SciTech Connect (OSTI)

    Padmore, H.A.; Howells, M.R.; Irick, S.; Renner, T.; Sandler, R.; Koo, Y.-M.

    1996-08-01

    Although x-ray micro-foci can be produced by a variety of diffractive methods, grazing incidence mirrors are the only route to an achromatic focus. In this paper we describe our efforts to produce elliptically shaped mirrors with the very high figure accuracy necessary for producing a micro-focus. The motivation for this work is provided by the need to produce achromatic foci for a range of applications ranging from tunable micro-focus x-ray photoelectron spectroscopy ({mu}-XPS) at soft x-ray energies to micro-focus white beam x-ray diffraction ({mu}-XRD) at hard x-ray energies. We describe the methodology of beam bending, a practical example of a system we have produced for {mu}-XRD, and results demonstrating the production of a surface with micro-radian figure accuracy.

  17. Ion polished Cr/Sc attosecond multilayer mirrors for high water window reflectivity

    SciTech Connect (OSTI)

    Guggenmos, Alexander; Radünz, Stefan; Rauhut, Roman; Hofstetter, Michael; Venkatesan, Sriram; Wochnik, Angela; Gullikson, Eric M.; Fischer, Stefan; Nickel, Bert; Scheu, Christina; Kleineberg, Ulf

    2014-01-20

    Recent advances in the development of attosecond soft X-ray sources ranging into the water window spectral range, between the 1s states of carbon and oxygen (284 eV–543 eV), are also driving the development of suited broadband multilayer optics for steering and shaping attosecond pulses. The relatively low intensity of current High Harmonic Generation (HHG) soft X-ray sources calls for an efficient use of photons, thus the development of low-loss multilayer optics is of uttermost importance. Here, we report about the realization of broadband Cr/Sc attosecond multilayer mirrors with nearly atomically smooth interfaces by an optimized ion beam deposition and assisted interface polishing process. This yields to our knowledge highest multilayer mirror reflectivity at 300 eV near normal incidence. The results are verified by transmission electron microscopy (TEM) and soft/hard X-ray reflectometry.

  18. Performance of 3-Sun Mirror Modules on Sun Tracking Carousels on Flat Roof Buildings

    SciTech Connect (OSTI)

    Fraas, Dr. Lewis; Avery, James E.; Minkin, Leonid M; Maxey, L Curt; Gehl, Anthony C; Hurt, Rick A; Boehm, Robert F

    2008-01-01

    Commercial buildings represent a near term market for cost competitive solar electric power provided installation costs and solar photovoltaic module costs can be reduced. JX Crystals has developed a carousel sun tracker that is prefabricated and can easily be deployed on building flat roof tops without roof penetration. JX Crystals is also developing 3-sun PV mirror modules where less expensive mirrors are substituted for two-thirds of the expensive single crystal silicon solar cell surface area. Carousels each with four 3-sun modules have been set up at two sites, specifically at Oak Ridge National Lab and at the University of Nevada in Las Vegas. The test results for these systems are presented.

  19. A mirror for lab-based quasi-monochromatic parallel x-rays

    SciTech Connect (OSTI)

    Nguyen, Thanhhai; Lu, Xun; Lee, Chang Jun; Jeon, Insu; Jung, Jin-Ho; Jin, Gye-Hwan; Kim, Sung Youb

    2014-09-15

    A multilayered parabolic mirror with six W/Al bilayers was designed and fabricated to generate monochromatic parallel x-rays using a lab-based x-ray source. Using this mirror, curved bright bands were obtained in x-ray images as reflected x-rays. The parallelism of the reflected x-rays was investigated using the shape of the bands. The intensity and monochromatic characteristics of the reflected x-rays were evaluated through measurements of the x-ray spectra in the band. High intensity, nearly monochromatic, and parallel x-rays, which can be used for high resolution x-ray microscopes and local radiation therapy systems, were obtained.

  20. Ion polished Cr/Sc attosecond multilayer mirrors for high water window reflectivity

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

    Guggenmos, Alexander; Radünz, Stefan; Rauhut, Roman; Hofstetter, Michael; Venkatesan, Sriram; Wochnik, Angela; Gullikson, Eric M.; Fischer, Stefan; Nickel, Bert; Scheu, Christina; et al

    2014-01-20

    Recent advances in the development of attosecond soft X-ray sources ranging into the water window spectral range, between the 1s states of carbon and oxygen (284 eV–543 eV), are also driving the development of suited broadband multilayer optics for steering and shaping attosecond pulses. The relatively low intensity of current High Harmonic Generation (HHG) soft X-ray sources calls for an efficient use of photons, thus the development of low-loss multilayer optics is of uttermost importance. Here, we report about the realization of broadband Cr/Sc attosecond multilayer mirrors with nearly atomically smooth interfaces by an optimized ion beam deposition and assistedmore » interface polishing process. This yields to our knowledge highest multilayer mirror reflectivity at 300 eV near normal incidence. The results are verified by transmission electron microscopy (TEM) and soft/hard X-ray reflectometry.« less