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DOE-Imaging grant FG02-06ER15829, entitled "Developing Laser-Induced Re-Collision Electron Self-Diffraction" Brief summary of accomplishments

Description: Our principal goal was the experimental demonstration of Laser-Induced Electron Diffraction (LIED). Key steps along the development of this experimental technique have been accomplished and reported in the publications listed in this brief report. We started with measuring 3D electron momenta spectra in aligned nitrogen and oxygen molecules. Chakra Maharjan (Ph.D. student of Lew Cocke) was a lead researcher on this project. Although Chakra succeeded in obtaining those spectra, we were scooped b… more
Date: 2012-04~
Creator: Litvinyuk, Igor V. & Ben-Itzhak, Itzik
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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NSLS 2005 ACTIVITY REPORT (NATIONAL SYNCHROTRON LIGHT SOURCE ACTIVITY REPORT 2005).

Description: In 2005, the NSLS proved itself, once again, to be a center of scientific excellence. This remarkable facility, commissioned in the early 1980s, is still attracting some of the world's best researchers in almost every scientific field, who produce more than seven hundred scientific papers every year using the NSLS. The 'Science Highlights' and 'Feature Highlights' sections of this report are just a small sampling of the many, many impressive research projects conducted at the NSLS in 2005. For … more
Date: May 1, 2006
Creator: MILLER, L. (EDITOR)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Optically pumped ultraviolet and infrared lasers driven by exploding metal films and wires

Description: The 342-nm molecular iodine and 1315-nm atomic iodine lasers have been optically pumped by intense light from exploding-metal-film and exploding-wire discharges. Brightness temperatures for the exploding-film discharges were approx. 25,000 K and for the wire discharges were approx. 30,000 K. For the I/sub 2/ laser the 3.5-cm-diameter by 40-cm-long pumped volume lies adjacent to the wire or film of the same length. Pressures of 1 to 6 torr I/sub 2/ and 1 to 3 atm SF, CF/sub 4/, or Ar were used i… more
Date: January 1, 1983
Creator: Jones, C. R. & Ware, K. D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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X-ray intensity interferometer for undulator radiation

Description: Intensity interferometry is well established with visible light but has never been demonstrated with x-radiation. We propose to measure the transverse coherence of an x-ray beam, for the first time, using the method of Hanbury Brown and Twiss. The x-ray interferometer consists of an array of slits, a grazing incidence reflective beamsplitter, a pair of fast multichannel plate detectors and a broadband, low-noise correlator circuit. The NSLS X1 or X13 soft x-ray undulator will supply the partial… more
Date: January 1, 1991
Creator: Gluskin, E.; McNulty, I.; Viccaro, P.J. (Argonne National Lab., IL (United States)) & Howells, M.R. (Lawrence Berkeley Lab., CA (United States))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Radiation-induced transient attenuation of optical fibers at 800 and 1300 nm

Description: Radiation-induced absorption in optical fibers has been a subject of considerable interest throughout the world. As availability and applications of fibers have evolved from ''first window'' systems operating near 850 nm to ''second window'' systems near 1300 nm, interest in wavelength dependence of radiation effects in optical fibers has similarly evolved. The present work summarizes second-window, radiation-induced transient absorption measurements in optical fibers for times shorter than 5 .… more
Date: January 1, 1987
Creator: Looney, L.D. & Lyons, P.B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Radiation-to-light converters for nuclear environments: near-infrared emitters

Description: The use of fiber optics in the diagnosis of hostile nuclear environments has brought about a pressing need for the development of suitable radiation-to-light converters. These converters must meet stringent diagnostic requirements of linearity and time response while having a wavelength of emission that is compatible with transmission over relatively long lengths of optical fibers. Initial investigations of two, near-infrared-emitting semiconducting materials - CdTe and GaAs are described. Data… more
Date: May 4, 1981
Creator: Roeske, F.; Rotter, M. D.; Calavan, P. M. & Lutz, S. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Solid state radioluminescent sources using zeolites

Description: Inorganic zeolites show promise as an alternative to traditional tritium gas tube light sources. Greater proximity of tritium atoms and luminescing centers, as well as greater tritium loading density, have been obtained within the zeolite aluminosilicate matrix. Zeolites are in addition optically clear and radiation stable. The zeolite radioluminescence program is described. Procedures for obtaining light sources are presented and results are discussed. 12 refs., 1 fig.
Date: January 1, 1990
Creator: Gill, J.T. (EG and G Mound Applied Technologies, Miamisburg, OH (USA)); Hawkins, D.B. (Alaska Univ., Fairbanks, AK (USA)) & Renschler, C.L. (Sandia National Labs., Albuquerque, NM (USA))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Compact X-Ray Lasers in the Laboratory

Description: Compact x-ray lasers in the laboratory can be produced with ultrahigh gradient rf linacs based on recent advances in linac technology by an SLAC-LLNL-LBL collaboration and on the development of bright, high current electron sources by BNL and LANL. The GeV electron beams generated with such accelerators can be converted to soft x rays in the range of 2--10 nm by passage through short period, high field strength wigglers. Alternatively, the beam can pump a low density dielectric to produce x ray… more
Date: October 3, 1988
Creator: Barletta, W. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Performance of a 500 watt Nd:GGG zigzag slab oscillator

Description: Realization of practical multi-kilowatt Nd:garnet lasers will require the scale-up of crystal dimensions as well as more powerful pumping sources. A high average power zigzag slab crystal amplifier testing facility has been established at LLNL which employs two 100 kW{sub e} vortex stabilized arc lamps, cooled reflectors and a cooled, spectrally filtered, crystal slab mounting fixture. The operational characteristics of the first crystal laser to be tested in this setup, a Nd:GGG zigzag oscilla… more
Date: January 12, 1990
Creator: Zapata, L.; Manes, K. R.; Christie, D.; Davin, J.; Blink, J.; Penland, J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Lifetime and diffusion length measurements on silicon material and solar cells. [Intentionally doped with impurities]

Description: Experimental methods were evaluated for the determination of lifetime and diffusion length in silicon intentionally doped with potentially lifetime-degrading impurities found in metallurgical grade silicon, impurities which may be residual in low-cost silicon intended for use in terrestrial flat-plat arrays. Results obtained by these methods were compared for mutual consistency. Lifetime measurements were made using a steady-state photoconductivity method, which was compared with a photoconduct… more
Date: January 1, 1977
Creator: Othmer, S. & Chen, S.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Radiation-to-light converters for nuclear environments: deep red emitters

Description: This report gives the preliminary results on work done to find a scintillator that is compatible with high-bandwidth, long-distance fiber-optic transmission. The requirements for such a scintillator are: (1) emission in the near-IR; (2) linear output over 2 to 3 decades of input excitation; (3) time response < 2 ns; and (4) immunity to radiation damage. The behavior of single crystal cadmium sulfide (CdS) and cadmium selenide (CdSe) was examined under electron and laser excitation. Both crystal… more
Date: June 18, 1981
Creator: Rotter, M. D.; Roeske, F.; Calavan, P. M. & Lutz, S. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Photodesorption from copper, beryllium and thin films

Description: Ever increasing circulating currents in electron-positron colliders and light sources demand lower and lower photodesportion (PSD) from the surfaces of their vacuum chambers and their photon absorbers. This is particularly important in compact electron storage rings and B meson factories where photon power of several kw cm{sup {minus}1} is deposited on the surfaces. Given the above factors we have measured PSD from 1m long bars of (1) solid copper and solid beryllium, and (2), TiN, Au and C thi… more
Date: January 1, 1991
Creator: Foerster, C.L.; Halama, H.J. & Korn, G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Triggering GaAs lock-on switches with laser diode arrays

Description: Many of the applications that require the unique capabilities of Photoconductive Semiconductor Switches (PCSS) demand a compact package. We have been able to demonstrate that GaAs switches operated in the high gain mode called lock-on'' meet the required electrical switching parameters of several such applications using small switch sizes. The only light source that has enough power to trigger a PCSS and is compatible with a small package is a laser diode. This paper will describe the progress … more
Date: January 1, 1990
Creator: Loubriel, G. M.; Helgeson, W. D.; McLaughlin, D. L.; O'Malley, M. W.; Zutavern, F. J.; Rosen, A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Turbulence in slurry pipe flow

Description: The present state of knowledge of liquid-solid flows (slurries) is far behind than that for single phase flows. Very few geometries have been examined with a slurry and only with a limited variation of system parameters i.e. fluid viscosity, particle diameter, etc. This paper presents the first part of a study which examines the effects of the addition of a solid to the flow through a confined coaxial jet. Presented here will be the initial conditions for the jet which correspond to fully devel… more
Date: January 1, 1990
Creator: Gore, R.A. (Los Alamos National Lab., NM (USA)) & Crowe, C.T. (Washington State Univ., Pullman, WA (USA). Dept. of Mechanical and Materials Engineering)
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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High Gradient Accelerators for Linear Light Sources

Description: Ultra-high gradient radio frequency linacs powered by relativistic klystrons appear to be able to provide compact sources of radiation at XUV and soft x-ray wavelengths with a duration of 1 picosecond or less. This paper provides a tutorial review of the physics applicable to scaling the present experience of the accelerator community to the regime applicable to compact linear light sources. 22 refs., 11 figs., 21 tabs.
Date: September 26, 1988
Creator: Barletta, W. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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High-pressure bulk-phosphor tritium lamps

Description: An alternate approach to maintain excitation efficiency is to fill the volume of the glass lamp with phosphor particles and use the tritium in the volume between particles to excite the phosphor. As the gas pressure (and tritium density) is increased, the light scales linearly with tritium density with little self-absorption. At about 25 Atm-T{sub 2}, the luminance of bulk phosphor equals the luminance of surface excitation at 1.8 foot-Lamberts (fL). Further increase of tritium pressure should … more
Date: January 1, 1990
Creator: Ellefson, R. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Radioisotope powered light sources

Description: Radioisotopes have been used for a number of years to excite phosphors to produce visible light. The advent of the nuclear age, however, made possible the preparation of radionuclides in larger quantities at relatively low prices, and with radiation properties that greatly expanded the potential applications for such lights. Current energy conservation needs and inflation leading to even higher costs for maintenance and capital equipment has provided the incentive for development of illuminator… more
Date: January 1, 1980
Creator: Case, F. N. & Remini, W. C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Solid state radioluminescent sources: Mixed organic/inorganic hybrids

Description: This concept brings a condensed source of tritium into close proximity with an inorganic phosphor. That source may thus become the equivalent of many atmospheres of tritium gas pressure. If both phosphor and tritium source material are optically clear, then a lamp's brightness may be made to scale with optical path length. Proof of principle of this concept has been demonstrated and will be described. A theoretical treatment is presented for the results here and for results from aerogel experim… more
Date: January 1, 1990
Creator: Gill, J.T. (EG and G Mound Applied Technologies, Miamisburg, OH (USA)); Renschler, C.L. (Sandia National Labs., Albuquerque, NM (USA)); Shepodd, T.J. (Sandia National Labs., Livermore, CA (USA)) & Smith, H.M. (Allied-Signal, Inc., Kansas City, MO (USA))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Engineering for high heat loads on ALS (Advanced Light Source) beamlines

Description: This paper discussed general thermal engineering problems and specific categories of thermal design issues for high photon flux beam lines at the LBL Advanced Light Source: thermal distortion of optical surfaces and elevated temperatures of thermal absorbers receiving synchrotron radiation. A generic design for water-cooled heat absorbers is described for use with ALS photon shutters, beam defining apertures, and heat absorbing masks. Also, results of in- situ measurements of thermal distortion… more
Date: August 1, 1989
Creator: DiGennaro, Richard & Swain, Thomas
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Waste-surface mapping of the Fernald K-65 silos using a structured light measurement system

Description: A remotely operated surface-mapping measurement system was developed by the Robotics Process Systems Division at Oak Ridge National Laboratory for use in the K-65 waste-storage silos at Fernald, Ohio. The mapping system used three infrared line-generating laser diodes as illumination sources and three high-resolution, low-lux, calibrated, black-and-white, charge-coupled-device video cameras as receivers. These components were combined to form structured light source range and direction sensors … more
Date: October 1, 1992
Creator: Burks, B. L.; DePiero, F. W.; Dinkins, M. A.; Rowe, J. C.; Selleck, C. B. & Jacoboski, D. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Center for X-Ray Optics, 1986

Description: The Center for X-Ray Optics has made substantial progress during the past year on the development of very high resolution x-ray technologies, the generation of coherent radiation at x-ray wavelengths, and, based on these new developments, had embarked on several scientific investigations that would not otherwise have been possible. The investigations covered in this report are topics on x-ray sources, x-ray imaging and applications, soft x-ray spectroscopy, synchrotron radiation, advanced light… more
Date: July 1, 1987
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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