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Light Absorption and Scattering Mechanisms in Laser Fusion Plasmas

Description: The picture of laser light absorption and scattering which is emerging from theory and computer simulation studies of laser-plasma interactions is described. On the subject of absorption, we discuss theoretical and experimental evidence that resonance absorption in a steepened density profile is a dominant absorption mechanism. Recent work also indicates the presence of critical surface ripples, which we study using two and three dimensional computer simulations. Predictions of hot electron spe… more
Date: October 4, 1977
Creator: Barnes, C.; Estabrook, K. G.; Kruer, W. L.; Langdon, A. B.; Lasinski, B. F.; Max, C. E. et al.
Partner: UNT Libraries Government Documents Department
open access

Report of Group II-2: Running at ISA

Description: A discussion is given of the anticipated operating conditions at the ISABELLE storage rings. Communications between experimental and control areas are considered, and beam luminosity monitoring is discussed. Running conditions and expected problems are outlined. (PMA)
Date: August 4, 1977
Creator: Chen, M.; Herrera, J. C.; Littenberg, L.; Thorndike, A.; Ogren, H.; Potter, K. et al.
Partner: UNT Libraries Government Documents Department
open access

Simple scaling model for exploding pusher targets

Description: A simple model has been developed which when normalized by experiment or Lasnex calculations can be used to scale neutron yields for variations in laser input power and pulse length and target radius and wall thickness. The model also illucidates some of the physical processes occurring in this regime of laser fusion experiments. Within certain limitations on incident intensity and target geometry, the model scales with experiments and calculations to within a factor of two over six decades in … more
Date: November 4, 1977
Creator: Storm, E. K.; Larsen, J. T.; Nuckolls, J. H.; Ahlstrom, H. G. & Manes, K. R.
Partner: UNT Libraries Government Documents Department
open access

Vacuum system for the Tandem Mirror Experiment

Description: The Tandem Mirror Experiment (TMX) under construction at LLL is a Q-enhancement experiment using two mirror fields to ''plug'' a central solenoid field. Neutral beam injection supplies the energetic neutrals to the plug regions with attendant quantities of cold gas. The vacuum vessel consists of two large stainless steel tanks, which house the plug coils, joined by an aluminum central cell tank, which fits inside the existing solenoid coils from the 2XIIB experiment. The plug tanks are subdivid… more
Date: October 4, 1977
Creator: Atkinson, D.P.; Calderon, M.O. & Nagel, R.J.
Partner: UNT Libraries Government Documents Department
open access

Automated laser fusion target production concept

Description: A target production concept is described for the production of multilayered cryogenic spherical inertial confinement fusion targets. The facility is to deliver targets to the reactor chamber at rates up to 10 per second and at costs consistent with economic production of power.
Date: October 4, 1977
Creator: Hendricks, C.D.
Partner: UNT Libraries Government Documents Department
open access

Scientific problems of fusion, solved and to be solved

Description: A good comprehensive review of research progress and the present status of research on inertial confinement, tokamak device, and magnetic mirror technology is given. (MOW)
Date: November 4, 1977
Creator: Post, Richard F.
Partner: UNT Libraries Government Documents Department
open access

Design of an eight-megawatt series regulator

Description: An 8-MW, 100 percent duty cycle, hard tube series regulator used to control the accelerating voltage of a neutral beam source is described. The series tube is a developmental switch/regulator tube capable of holding off 200 kV passing 85 A, and dissipating 2 MW of anode power. The regulator has high-speed interrupt capability to minimize the power delivered to the load in the event of a load fault. Its design is such that it can be used to regulate both positive and negative accelerating voltag… more
Date: October 4, 1977
Creator: DeVore, K.R.
Partner: UNT Libraries Government Documents Department
open access

Acoustic analysis of sodium boiling stability tests using THORS bundle 6A

Description: Acoustic data from boiling stability tests on the THORS (Thermal-Hydraulic Out-of-Reactor Safety) facility are presented and discussed. The THORS sodium loop is a high temperature test facility that contains the bundle 6A, a full length stimulated fuel subassembly with nineteen electrically heated pins. Boiling stability tests on the THORS facility were designed to determine if a stable boiling region exists during the thermal hydraulic test at normal and off-normal conditions. Boiling was obse… more
Date: May 4, 1977
Creator: Sheen, S. H.; Bobis, J. P. & Carey, W. M.
Partner: UNT Libraries Government Documents Department
open access

Transit time spread measurements of microchannel plate photomultipliers

Description: An investigation of the single photoelectron and multi-photoelectron transit time-spread performance of prototype photomultipliers using curved high-gain microchannel plates for electron multiplication and proximity focusing for the input and collector stages is reported. A microchannel plate consists of a closely packed two dimensional array of very small diameter, short channel-electron multipliers. Each single channel electron multiplier is a continuous glass tube whose inside surface has a … more
Date: April 4, 1977
Creator: Keskovar, B. & Lo, C. C.
Partner: UNT Libraries Government Documents Department
open access

Particle-in-cell vs straight line Gaussian calculations for an area of complex topography. [Environmental transport of radioactive effluents in surface air]

Description: Two numerical models for the calculation of time integrated air concentraton and ground deposition of airborne radioactive effluent releases are compared. The time dependent Particle-in-Cell (PIC) model and the steady state Gaussian plume model were used for the simulation. The area selected for the comparison was the Hudson River Valley, New York. Input for the models was synthesized from meteorological data gathered in previous studies by various investigators. It was found that the PIC model… more
Date: March 4, 1977
Creator: Lange, R. & Sherman, C.
Partner: UNT Libraries Government Documents Department
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