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D/sup -/ production by multiple charge-transfer collisions of low-energy D ions and atoms in cesium vapor

Description: The production of D/sup -/ by multiple charge-transfer collisions of a D/sup +/ beam in a cesium-vapor target is considered for D/sup +/ energies above 300 eV. The cross sections relevant to D/sup -/ formation are obtained by a least-squares fit of three-charge-state differential equations to experimental yield curves. Implications for production of intense negative-ion beams are discussed, and speculations are made about extrapolation to lower engeries.
Date: January 22, 1978
Creator: Hooper, E. B. Jr.; Willmann, P. A. & Schlachter, A. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effects of low-temperature fusion neutron irradiation on critical properties of a monofilament niobium-tin superconductor

Description: The objective of this work was to irradiate a Nb/sub 3/Sn superconductor with 14.8 MeV neutrons at 4 K and measure critical current in transverse fields of up to 12 T, irradiating up to a fluence sufficient to decrease the critical current to below its initial value. Critical temperatures were also to be measured. The samples were to be kept near 4 K between the irradiation and the measurement of critical properties. This work is directed toward establishing an engineering design fluence limit … more
Date: March 22, 1984
Creator: Guinan, M.W.; Van Konynenburg, R.A. & Mitchell, J.B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Studies of Plasma Transport

Description: This report discusses the charge-coupled device camera and other plasma diagnostic equipment used to measure plasma density and other plasma properties. (LSP)
Date: July 22, 1991
Creator: Malmberg, J. H.; O'Neil, T. M. & Driscoll, C. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development of a high-density energy-storage capacitor for Nova

Description: This paper covers Maxwell's approach to developing energy storage capacitors. Based on previous capacitor designs of 3 KJ, 5 KJ and 10 KJ, the final Nova 12.5 KJ capacitor evolved. At the outset of the Nova capacitor development program, a relatively new dielectric system, polypropylene-paper-DOP, seemed to show superiority in volumetric efficiency, life, and more importantly cost. However, as a result of studies performed at Maxwell, a high-density, energy-storage capacitor was developed utili… more
Date: October 22, 1981
Creator: Haskell, D. K.; Cooper, R. A.; Sevigny, J. A.; Merritt, B. T.; Carder, B. M. & Whitham, K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Addition of bromine as a diagnostic gas to inertial confinement fusion target microspheres

Description: Currently, direct fuel rho r measurements on Inertial Confinement Fusion (ICF) targets by neutron activation of the argon tracer gas mixed with the DT fuel would require a 100 fold increase in neutron yield. Bromine, on the other hand, has excellent properties for neutron activation analysis at neutron yields of 10two' to 10/sup 8/, when present at an internal pressure of from 0.1 to 0.2 atmospheres. Bromine addition is accomplished in a 2 furnace system using the dried-gel method of microspher… more
Date: August 22, 1980
Creator: Morrison, R. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Background field coils for the High Field Test Facility

Description: The High Field Test Facility (HFTF), presently under construction at LLNL, is a set of superconducting coils that will be used to test 1-m-o.d. coils of prototype conductors for fusion magnets in fields up to 12 T. The facility consists of two concentric sets of coils; the outer set is a stack of Nb-Ti solenoids, and the inner set is a pair of solenoids made of cryogenically-stabilized, multifilamentary Nb/sub 3/Sn superconductor, developed for use in mirror-fusion magnets. The HFTF system is d… more
Date: September 22, 1980
Creator: Zbasnik, J. P.; Cornish, D. N.; Scanlan, R. M.; Jewell, A. M.; Leber, R. L.; Rosdahl, A. R. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Numerical solution of the Schroedinger integral equation for dt. mu. Progress report

Description: The Schroedinger Integral Equation is derived for an N-body system, and solutions for required Green's functions are obtained. The initial method of numerical solution has yielded the correct ground states and lower excited states of He (test case) and dt..mu... Steps are being taken to improve the numerical accuracy.
Date: August 22, 1986
Creator: Morgan, D.L. Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Scaling of exploding pusher targets

Description: A theory of exploding pusher laser pusher targets is compared to results of LASNEX calculations and to Livermore experiments. A scaling relationship is described which predicts the optimum target/pulse combinations as a function of the laser power.
Date: August 22, 1977
Creator: Nuckolls, J.H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Stability of space-charge neutralized beams

Description: Consideration is given to the stability of negative ion beams which are neutralized through ionization of a background gas. Two types of instabilities are examined. First, beam-plasma instabilities are analyzed with the dispersion relation showing that they are unimportant if the beam velocity is less than the electron thermal velocity. Second, results of a computer simulation on the flow of a cylindrical beam and the resulting background plasma show that when the background neutral gas density… more
Date: September 22, 1977
Creator: Turnbull, R. J. & Hooper, E. B. Jr.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Fusion breeder

Description: The fusion breeder is a fusion reactor designed with special blankets to maximize the transmutation by 14 MeV neutrons of uranium-238 to plutonium or thorium to uranium-233 for use as a fuel for fission reactors. Breeding fissile fuels has not been a goal of the US fusion energy program. This paper suggests it is time for a policy change to make the fusion breeder a goal of the US fusion program and the US nuclear energy program. The purpose of this paper is to suggest this policy change be mad… more
Date: February 22, 1982
Creator: Moir, Ralph W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Mechanical construction of the 22 Nova laser

Description: The Nova laser system for Inertial Confinement Fusion studies at Lawrence Livermore National Laboratory is under construction and will be completed October 1984 with first operations scheduled for 1985. This system is the largest precision opto-mechanical engineering system ever built. Major engineering and subsystems are mechanical, optical, and electrical power. A series of system technologies include alignment, diagnostics, target, frequency conversion, and controls. This paper will only dis… more
Date: November 22, 1983
Creator: Hurley, C.A.; Frick, F.A.; Patton, H.G.; Bradley, G. & Martos, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Proposal to utilize fusion reactor energy sources for chemical process applications

Description: We propose to study the utilization of high-temperature (approximately 2000-2500K) process heat from fusion reactors for large-scale chemical process applications. Of particular interest is the decomposition reaction, CO/sub 2/ ..-->.. CO + /sup 1///sub 2/O/sub 2/, which at 2500K should yield approximately 60 percent conversion to CO if O/sub 2/ is partially removed through an oxide membrane. Hydrogen can be derived from CO at lower temperatures by reacting CO with steam, and C can also be d… more
Date: September 22, 1977
Creator: Krikorian, O. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Recent US target-physics-related research in heavy-ion inertial fusion: simulations for tamped targets and for disk experiments in accelerator test facilities

Description: Calculations suggest that experiments relating to disk heating, as well as beam deposition, focusing and transport can be performed within the context of current design proposals for accelerator test-facilities. Since the test-facilities have lower ion kinetic energy and beam pulse power as compared to reactor drivers, we achieve high-beam intensities at the focal spot by using short focal distance and properly designed beam optics. In this regard, the low beam emittance of suggested multi-beam… more
Date: March 22, 1982
Creator: Mark, J.W.K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Nonlinear ion-cyclotron waves in mirror machines. Paper IAEA-CN-38/S-1

Description: Experimental results on ion-cyclotron waves observed in the 2XIIB mirror machine are reviewed, and relevant theoretical work is discussed. The work reported generally substantiates the quasilinear diffusion model of mirror-plasma confinement, but also suggests alternatives. The end-loss current required by theory of the drift-cyclotron loss-cone (DCLC) instability agrees with measurements of this current. The experiment indicates that an increased ratio of plasma radius to ion gyroradius improv… more
Date: May 22, 1980
Creator: Cohen, B. I.; Smith, G. R. & Berk, H. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Cold-pressure-welded joints in large multifilamentary Nb--Ti superconductors

Description: A number of mechanical and electrical measurements were made on joints in typical conductors for the proposed mirror fusion test facility (MFTF) and high field test facility (HFTF). For such measurements, a commercially available cold-pressure-welding machine was used. For joints in the MFTF conductor, which has a large proportion of superconductor, joint strength approached conductor strength. For the HFTF conductor, where the Cu-to-superconductor ratio is 4.33/1, the joint is stronger than th… more
Date: September 22, 1977
Creator: Cornish, D.N.; Deis, D.W. & Zbasnik, J.P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Polarizer reflectivity variations

Description: On Shiva the beam energy along the chain is monitored using available reflections and/or transmission through beam steering, splitting, and polarizing optics without the intrusion of any additional glass for diagnostics. On the preamp table the diagnostic signal is obtained from the signal transmitted through turning mirrors. At the input of each chain the signal is obtained from the transmission through one of the mirrors used for the chain input alignment sensor (CHIP). At the chain output th… more
Date: February 22, 1980
Creator: Ozarski, R.G. & Prior, J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Plasma confinement experiments in the TMX tandem mirror. Paper IAEA-CN-38/F-1

Description: Results from the new Tandem Mirror Experiment (TMX) are described. Tandem-mirror density and potential profiles are produced using end-plug neutral-beam injection and central-cell gas-fueling. TMX parameters are near those predicted theoretically. The end-plug electron temperature is higher than in the comparably sized single-mirror 2XIIB. Axial confinement of the finite-beta central-cell plasma is improved by the end plugs by as much as a factor of 9. In TMX, end-plug microinstability limits c… more
Date: May 22, 1980
Creator: Simonen, T. C.; Anderson, C. A. & Casper, T. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Theory of field-reversed mirrors and field-reversed plasma-gun experiments. Paper IAEA-CN-38/R-2

Description: Experimental and theoretical studies of field reversal in a mirror machine are reported. Plasma-gun experiments demonstrate that reversed-field plasma layers are formed. Low energy plasma flowing behind the initially produced plasma front prevents tearing of the layer from the gun muzzle. MHD simulation shows that tearing can be obtained by impeding the slow plasma flow with a plasma divider. It is demonstrated theoretically that a field-reversed mirror imbedded in a multipole field can be sust… more
Date: May 22, 1980
Creator: Anderson, D.V.; Auerbach, S.P. & Berk, H.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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TEBASCO user's guide

Description: TEBASCO is a Tandem mirror Equilibrium and BAllooning Stability COde. TEBASCO allows you to compute tandem-mirror MHD equilibria and to analyze both the flute-averaged and ballooning-mode stability of these equilibria. This stability analysis is directed toward the computation of marginal stability boundaries. Users of TEBASCO require a binary output file from the EFFI code which describes the vacuum magnetic field. In making this EFFI file the user will have defined a system of units for lengt… more
Date: September 22, 1983
Creator: Pearlstein, L. D.; Kaiser, T. B.; LoDestro, L.; Maron, N.; Nevins, W. M. & Willmann, P. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Stochastic Acceleration by a Single Wave in a Magnetized Plasma

Description: A particularly simple problem exhibiting stochasticity is the motion of a charged particle in a uniform magnetic field and a single wave. Detailed studies of this wave-particle interaction show the following features. An electrostatic wave propagating obliquely to the magnetic field causes stochastic motion if the wave amplitude exceeds a certain threshold. The overlap of cyclotron resonances then destroys a constant of the motion, allowing strong particle acceleration. A wave of large enough a… more
Date: September 22, 1977
Creator: Smith, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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S-20 photocathode research activity. Part I

Description: The goal of this activity has been to develop and implement S-20 photocathode processing techniques at Lawrence Livermore National Laboratory (LLNL) in order to study the physical properties of the photocathode films. The present work is the initial phase of a planned activity in understanding cathode fabrication techniques and the optical/electrical characterization of these films.
Date: November 22, 1983
Creator: Gex, F.; Huen, T. & Kalibjian, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Investigation of the Richtmyer-Meshkov instability

Description: The present program is centered on the experimental study of shock-induced interfacial fluid instabilities. Both 2-D (near-sinusoids) and 3-D (spheres) initial conditions are studied in a large, vertical square shock tube facility. The evolution of the interface shape, its distortion, the modal growth rates and the mixing of the fluids at the interface are all objectives of the investigation. In parallel to the experiments, calculations are performed using the Raptor code, on platforms made ava… more
Date: December 22, 2008
Creator: Bonazza, Riccardo; Anderson, Mark & Oakley, Jason
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Final Report: Radiation-magnetohydrodynamic evolution and instability of conductors driven by megagauss magnetic fields

Description: We are pleased to report important progress in experimentally characterizing and numerically modeling the transformation into plasma of walls subjected to pulsed megagauss magnetic fields. Understanding this is important to Magnetized Target Fusion (MTF) because an important limitation to the metal liner approach to MTF comes from the strong eddy current heating on the surface of the metal liner. This has intriguing non-linear aspects when the magnetic field is in the megagauss regime as needed… more
Date: October 22, 2008
Creator: Bauer, Bruno, S. & Siemon, Richard, E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Atomic Emission, Absorption and Fluorescence in the Laser-induced Plasma

Description: The main result of our efforts is the development and successful application of the theoretical model of laser induced plasma (LIP) that allows a back-calculation of the composition of the plasma (and the condensed phase) based on the observable plasma spectrum. The model has an immediate experimental input in the form of LIP spectra and a few other experimentally determined parameters. The model is also sufficiently simple and, therefore, practical. It is conveniently interfaced in a graphical… more
Date: January 22, 2009
Creator: Winefordner, J. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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