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Electron energy distributions, vibrational population distributions, and negative-ion concentrations in hydrogen discharges

Description: We consider the negative ion concentrations in hydrogen discharges caused by electron excitation and dissociative attachment processes. The principal formation and destruction processes are discussed for electron densities in the range 10/sup 8/ to 10/sup 13/ electrons cm/sup -3/. Expressions are developed for calculating the high energy portion of the electron energy distribution in the discharge; using these energy distributions the electron excitation rates are evaluated. At low densities, t… more
Date: June 28, 1982
Creator: Hiskes, J.R. & Karo, A.M.
Partner: UNT Libraries Government Documents Department
open access

Materials processing in space: ICF target fabrication implications

Description: During the last quarter of 1982, the Novette laser will become operational at Lawrence Livermore National Laboratory. The primary characteristics of the Novette laser are shown. In many ways, the new laser will serve as a proving ground and test bed for the Nova laser which is also under construction and should be operational in early 1985. Tables provide the Nova operational characteristics. The advent of the two new lasers, Novette and Nova, will make it possible to study many new and excitin… more
Date: April 28, 1982
Creator: Hendricks, C.D.
Partner: UNT Libraries Government Documents Department
open access

Linear theory radial and nonradial pulsations of DA dwarf stars

Description: The Los Alamos stellar envelope and radial linear non-adiabatic computer code, along with a new Los Alamos non-radial code are used to investigate the total hydrogen mass necessary to produce the non-radial instability of DA dwarfs. (GHT)
Date: July 28, 1982
Creator: Starrfield, S.; Cox, A.N.; Hodson, S. & Pesnell, W.D.
Partner: UNT Libraries Government Documents Department
open access

Application of fast infrared detectors to detonation science

Description: Infrared radiometers have been used to make time-resolved emission measurements of shocked explosives. Instruments of moderate time resolution were used to estimate temperatures in shocked but not detonated explosives. The heterogeneity of the shock-induced heating was discovered in pressed explosives by two-band techniques, and the time-resolved emittance or extent of hot spot coverage indicated a great dependence on shock pressures. Temperatures in moderately shocked organic liquids were also… more
Date: July 28, 1982
Creator: Von Holle, W. G. & McWilliams, R. A.
Partner: UNT Libraries Government Documents Department
open access

Production of glass balloons for laser targets

Description: An apparatus for producing small quantities of glass balloons for use as laser fusion targets is described. To produce precise quantities of the ingredients of one glass balloon, a jet of an aqueous solution of the glass constituents and a blowing agent is metered into uniformly sized drops by Rayleigh breakup. A small fraction of these uniform drops is then passed through an oven where the water is evaporated, the remaining solid material is fused into glass, and a blowing agent decomposes or … more
Date: September 28, 1982
Creator: Hendricks, C.D. & Dressler, J.L.
Partner: UNT Libraries Government Documents Department
open access

Application of Two-time Methods in Stellar Pulsations

Description: The method of two-time expansions is extended to include the effects of the outer, non-adiabatic layers in stellar pulsation. The evolution of pulsating stellar models can be examined, including the approach to limit cycle behavior. The method is demonstrated by a calculation of the eigenvectors for a ..beta.. Cepheid model. It is argued that the method is promising as a practical tool for treating the approach to limiting oscillations, as well as resonant and multimode behavior.
Date: July 28, 1982
Creator: Pesnell, W. Dean; Regev, Oded & Buchler, J. Robert
Partner: UNT Libraries Government Documents Department
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