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Optical Processing of Radionuclide Images.

Description: No Description Available.
Date: 1969~
Creator: Beck, Robert N.; Charleston, Donald B.; Harper, Paul V. & Yasillo, Nicholas J.
Partner: UNT Libraries Government Documents Department
open access

Potential for efficient frequency conversion at high average power using solid state nonlinear optical materials

Description: High-average-power frequency conversion using solid state nonlinear materials is discussed. Recent laboratory experience and new developments in design concepts show that current technology, a few tens of watts, may be extended by several orders of magnitude. For example, using KD*P, efficient doubling (>70%) of Nd:YAG at average powers approaching 100 KW is possible; and for doubling to the blue or ultraviolet regions, the average power may approach 1 MW. Configurations using segmented apertur… more
Date: October 28, 1985
Creator: Eimerl, D.
Partner: UNT Libraries Government Documents Department
open access

Laser annealing of ion implanted CZ silicon for solar cell junction formation. Quarterly report No. 2

Description: Results on a contract to evaluate the merits of large spot size pulsed laser annealing of ion implanted silicon wafers for junction formation in solar cells are reported. Investigations on homogenization of the laser beam were continued. In addition to the 30 mm diameter fused silica rod with a 90/sup 0/ bend configuration, quartz tubes were obtained and briefly tried. Best results were obtained with the rod homogenizer. Laser annealing experimentation resulted in complete recrystallization of … more
Date: October 1, 1980
Creator: Katzeff, J. S.
Partner: UNT Libraries Government Documents Department
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Investigation of induced unimolecular decomposition for development of visible chemical lasers. Final report, 1 May 1976--30 April 1977

Description: This report summarizes the results of a study of azide decomposition for possible application in a visible chemical laser. Task 1 of the subject contract involved thorough review of the chemical literature pertaining to azide decomposition. Covalently bonded azides decompose directly into an electronically excited nitrene (RN) and ground-state molecular nitrogen. Ionic azides decompose to metal atoms and azide radicals. The azide radicals subsequently recombine to form electronically excited ni… more
Date: May 1, 1977
Creator: Piper, L G & Taylor, R L
Partner: UNT Libraries Government Documents Department
open access

Applications of mesoscopic physics

Description: This report discusses the following topics: Acoustical nondestructive evaluation of heterogeneous materials in the multiple scattering regime. Classical and quantum superdiffusion in a time-dependent random potential. Negative Magnetoresistance in Variable Range Hopping Conduction. Reproducible Conductance Fluctuations in Macroscopic Anderson Insulators. Feasibility of far-infared lasers using multiple semiconductor quantum wells.
Date: January 1, 1992
Creator: Feng, Shechao.
Partner: UNT Libraries Government Documents Department
open access

Feasibility of laser pumping with neutron fluxes from present-day large tokamaks

Description: The minimum fusion-neutron flux needed to observe nuclear-pumped lasing with tokamaks can be reduced substantially by optimizing neutron scattering into the laser cell, located between adjacent toroidal-field coils. The laser lines most readily pumped are probably the /sup 3/He-Ne lines at 0.633 ..mu.. and in the infrared, where the /sup 3/He-Ne gas is excited by energetic ions produced in the /sup 3/He(n,p)T reaction. These lines are expected to lase at the levels of D-T neutron flux foreseen … more
Date: August 1, 1986
Creator: Jassby, D. L.
Partner: UNT Libraries Government Documents Department
open access

Phoenix I energy extraction experiment

Description: Energy extraction experiments are reported for the Phoenix I amplifier driven by a discharge-initiated oscillator-preamplifier system operating on mixtures of either SF/sub 6/-HI or SF/sub 6/-C/sub 2/H/sub 6/ and an electron-beam-initiated intermediate amplifer (lambda-3) fueled with H/sub 2/ and F/sub 2/ mixtures. When the oscillator-preamplifier system operated with mixtures of SF/sub 6/-HI the input spectrum to the Phoenix I amplifier contained approx. 28 P-branch vibrational-rotational line… more
Date: July 1, 1980
Creator: Hoffman, J. M.; Patterson, E. L.; Tisone, G. C. & Moreno, J. B.
Partner: UNT Libraries Government Documents Department
open access

Electron heating and confinemet measurements in EBT-S using Thomson scattering

Description: Thomson scattering of ruby laser light was used to measure electron temperatures and densities in the ELMO Bumpy Torus-Scale (EBT-S) at Oak Ridge National Laboratory. The measurements were made primarily during May 1980, although some were taken during January 1980. The scattering system, which was designed for very low electron density measurements, features a 14-J ruby laser, a high-throughput spectrometer, and 15% quantum efficiency photomultipliers. The measured electron densities lie in th… more
Date: September 1, 1980
Creator: Bighel, L. & Cobble, J. A.
Partner: UNT Libraries Government Documents Department
open access

Proposed research on advanced accelerator concepts

Description: This report summarizes technical progress and accomplishments during the proposed three-year research on advanced accelerator concepts supported by the Department of Energy under Contract No. DE-FG02-88ER40465. A vigorous theoretical program has been pursued in critical problem areas related to advanced accelerator concepts and the basic equilibrium, stability, and radiation properties of intense charged particle beams. Broadly speaking, our research has made significant contributions in the fo… more
Date: September 1, 1991
Creator: Davidson, R.C. & Wurtele, J.S.
Partner: UNT Libraries Government Documents Department
open access

Investigation on the damage threshold of films coated on various silicate, fluorophosphate and phosphate laser glasses. Final report, January 1, 1979-August 29, 1980

Description: Effects of substrate laser glass on the damage threshold and adhesion of dielectric films has been studied in order to improve the damage threshold. The study is divided into two parts: the first part dealing with four types of laser glass, LSG-91H silicate, LHG-8 phosphate, P-1 phosphate and LHG-10 fluorophosphate; the second part dealing with twenty-six glasses with systematically modified compositions in three glass systems, silicate, phosphate and fluorophosphate.
Date: January 1, 1980
Creator: Nakajima, Y & Izumitani, T
Partner: UNT Libraries Government Documents Department
open access

Experimental development of nuclear pumped laser candidate inertial confinement fusion driver

Description: This progress report is submitted at the end of the first year of a 3-year project grant studying development of a nuclear pumped atomic iodine laser. The first section of the report will provide background on the study and briefly describe the original plans for the 3-year project. The second section will detail the work done to date. Included will be a description of the preparations made for experimentation, as well as some preliminary results recently obtained. Plans for the upcoming budget… more
Date: May 31, 1989
Creator: Miley, George H.
Partner: UNT Libraries Government Documents Department
open access

Shiva automatic alignment systems: a brief description

Description: A diagram is given of the basic Shiva alignment system. The alignment requirements, as originally specified and as preseently estimated, together with the performance obtained to date from the prototype equipment are described. It is expected that this performance will be satisfactory for even the most alignment-sensitive targets and significantly better than is needed for experiments not requiring highly uniform illumination. The hardware arrangement planned for a typical Shiva chain is shown.
Date: September 6, 1977
Creator: Bliss, E. S.; Summers, M. A.; Cody, R. L.; Boyd, R. D. & Wintemute, J. D.
Partner: UNT Libraries Government Documents Department
open access

Laser-fusion program at Los Alamos

Description: A general introduction to laser fusion research at Los Alamos is given. The paper discusses laser choices, CO/sub 2/ lasers, target interaction experiments, and conceptual power plants. (MOW)
Date: January 1, 1977
Creator: Perkins, R.B.
Partner: UNT Libraries Government Documents Department
open access

Energy and technology review

Description: Three areas of research are discussed: microcomputer technology applied to inspecting machined parts to determine roundness in ultraprecision measurements; development of an electrolytic technique for preparing dinitrogen pentoxide as a potentially less expensive step in the large-scale synthesis of the explosive HMX; and the application of frequency conversion to short wavelengths in the Novette and Nova lasers to improve the performance of inertial-confinement fusion targets. (GHT)
Date: August 1, 1982
Partner: UNT Libraries Government Documents Department
open access

Dynamics of H sub 2 elimination from unsaturated hydrocarbons

Description: State-of-the-art laser and molecular beam techniques are used to study the dynamics of H{sub 2} elimination from 1,4-cyclohexadiene and ethylene. Information on the transition state configurations and the dynamics of the dissociation processes for these reactions is reported. 152 refs., 54 figs., 12 tabs.
Date: February 1, 1991
Creator: Cromwell, E.F.
Partner: UNT Libraries Government Documents Department
open access

Acceleration of electrons using an inverse free electron laser auto- accelerator

Description: We present data from our study of a device known as the inverse free electron laser. First, numerical simulations were performed to optimize the design parameters for an experiment that accelerates electrons in the presence of an undulator by stimulated absorption of radiation. The Columbia free electron laser (FEL) was configured as an auto-accelerator (IFELA) system; high power (MW's) FEL radiation at {approximately}1.65 mm is developed along the first section of an undulator inside a quasi-o… more
Date: July 1, 1992
Creator: Wernick, I.K. & Marshall, T.C.
Partner: UNT Libraries Government Documents Department
open access

Metal vapor excimer laser. Quarterly progress report, May 1, 1977--July 31, 1977. [CdHg vapors]

Description: The CdHg excimer program will attempt to determine the existence of optical gain in a discharge pumped high temperature medium. This first quarterly contract period primarily involves detailed design of the experimental apparatus capable of producing high temperature metal vapor. The report begins with the general considerations which went into designing the experiment and follows with descriptions and schematics of the experiment as presently conceived.
Date: October 1, 1977
Creator: Kovacs, M A & Jacob, J H
Partner: UNT Libraries Government Documents Department
open access

National Synchrotron Light Source annual report 1991

Description: This report discusses the following research conducted at NSLS: atomic and molecular science; energy dispersive diffraction; lithography, microscopy and tomography; nuclear physics; UV photoemission and surface science; x-ray absorption spectroscopy; x-ray scattering and crystallography; x-ray topography; workshop on surface structure; workshop on electronic and chemical phenomena at surfaces; workshop on imaging; UV FEL machine reviews; VUV machine operations; VUV beamline operations; VUV stor… more
Date: April 1, 1992
Creator: Hulbert, S.L. & Lazarz, N.M. (eds.)
Partner: UNT Libraries Government Documents Department
open access

Laser cutting plastic materials

Description: A 1000-watt CO/sub 2/ laser has been demonstrated as a reliable production machine tool for cutting of plastics, high strength reinforced composites, and other nonmetals. More than 40 different plastics have been laser cut, and the results are tabulated. Applications for laser cutting described include fiberglass-reinforced laminates, Kevlar/epoxy composites, fiberglass-reinforced phenolics, nylon/epoxy laminates, ceramics, and disposable tooling made from acrylic.
Date: August 1, 1980
Creator: Van Cleave, R.A.
Partner: UNT Libraries Government Documents Department
open access

Mechanical deflection analysis of diamond-turned reflective optics

Description: An analytical technique has been developed that predicts the amount of warpage that metal reflective mirrors sustain due to various support and load conditions. The laser fusion project being conducted at LASL requires that metal reflective optics be fabricated by diamond turning. The diamond-turning process imposes some unusual loading conditions which result in mirror warpage. The finite-element method is used to compute mirror surface displacements resulting from these support and load condi… more
Date: December 1, 1977
Creator: Stoneking, J. E. & Gerth, H. L.
Partner: UNT Libraries Government Documents Department
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