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Brillouin scatter in a hydrodynamic simulation

Description: A numerical method for modeling stimulated Brillouin scatter (SBS) in a hydrodynamic simulation code is discussed. Preliminary results using the model show that scattering is reduced as shorter wavelengths are used and for spherical symmetry that ion heating by SBS is not significant since the ions cool by expansion.
Date: June 8, 1979
Creator: Harte, J.; Estabrook, K. & Bailey, D.
Partner: UNT Libraries Government Documents Department
open access

Design and testing of low capacitance, 80-kV source cables for MFTF sustaining neutral beam power supplies

Description: In this paper we summarize characteristics of several cable configurations and consider one design in detail, which consists of twelve, 250 MCM arc cables, ten 4/0 filament cables, and accel, gradient grid, control, and instrumentation cables within a circular split Al pipe. The pipe is air insulated from an outer 24-in. x 24-in. steel duct by utility pin insulators. Varying run lengths require adjustment of the arc inductance by variation of cross sectional cable position. Equilibrium heat tra… more
Date: November 8, 1979
Creator: Mayhall, D. J. & Shimer, D. W.
Partner: UNT Libraries Government Documents Department
open access

Supervisory Control and Diagnostics System Distributed Operating System

Description: This paper contains a description of the Supervisory Control and Diagnostics System (SCDS) Distributed Operating System. The SCDS consists of nine 32-bit minicomputers with shared memory. The system's main purpose is to control a large Mirror Fusion Test Facility (MFTF).
Date: November 8, 1979
Creator: McGoldrick, P.R.
Partner: UNT Libraries Government Documents Department
open access

Finite mean-free-path effects on axial particle transport in mirror devices

Description: The problem of collisional particle and energy transport in open-ended systems, where the axial transport is dominant, is considered. The Fokker-Planck equation for the distribution function has previously been solved in two limits: when the mean-free-path lambda/sub mfp/ is long compared to the system length L, and when lambda/sub mfp/ << L. A Monte Carlo procedure is presented for the solution of the equation which is formally valid for any range of lambda/sub mfp/L, although it is most pract… more
Date: June 8, 1979
Creator: Rognlien, T. D. & Cutler, T. A.
Partner: UNT Libraries Government Documents Department
open access

Cryogenic Aspects of the Mirror Fusion Test Facility

Description: This paper covers the design and construction of the MFTF cryogenic system and a description of the operating procedures throughout the many functional modes. The coils and the cryopanels for maintaining the high vacuum environment weigh 417,000 kg (920,000 lb) and must be cooled from room temperature to 4.5 k. The cryogenic system for MFTF consists of a closed-loop helium system with a 3000-W helium refrigerator that uses gas-bearing expansion turbines and oil-flooded screw compressors. In add… more
Date: November 8, 1979
Creator: Sterbentz, W. H. & Nelson, R. L.
Partner: UNT Libraries Government Documents Department
open access

Mirror fusion test facility plasma diagnostics system

Description: During the past 25 years, experiments with several magnetic mirror machines were performed as part of the Magnetic Fusion Energy (MFE) Program at LLL. The latest MFE experiment, the Mirror Fusion Test Facility (MFTF), builds on the advances of earlier machines in initiating, stabilizing, heating, and sustaining plasmas formed with deuterium. The goals of this machine are to increase ion and electron temperatures and show a corresponding increase in containment time, to test theoretical scaling … more
Date: November 8, 1979
Creator: Thomas, S.R. Jr., Coffield, F.E.; Davis, G.E. & Felker, B.
Partner: UNT Libraries Government Documents Department
open access

AP190L and PDP-KI10: a hardware/software measurement report. [FIVE package for use with AP]

Description: This report discusses an AP190L array processor (manufactured by Floating Point Systems of Beaverton, Oregon) interfaced to a PDP-10 (Digital Equipment Corporation, Maynard, Mass.). After AP software installation, an analysis of the overhead was performed. The results of these measurements and some conclusions are presented. An AP monitor and software interface were written to minimize the overhead from the PDP-10. A vector extension to the FORTRAN language called FIVE was developed to increase… more
Date: March 8, 1979
Creator: Maron, N. & Sutherland, G.G.
Partner: UNT Libraries Government Documents Department
open access

Fuel pellets and optical systems for inertially confined fusion

Description: Current laser-driven ICF targets are complex sets of concentric spherical shells made from a variety of materials including the fuel (e.g., deuterium-tritium), glass, beryllium, gold, polymeric materials, organo-metallics, and several additional organic and inorganic materials depending on the particular experiments to be done. While it is not yet known what the reactor targets will be exactly, there is little reason to believe they will be just simple, low quality glass shells containing DT ga… more
Date: May 8, 1979
Creator: Hendricks, C.D.
Partner: UNT Libraries Government Documents Department
open access

Decommissioning a tritium glove-box facility

Description: A large glove-box facility for handling reactive metal tritides was decommissioned. Major sections of the glove box were decontaminated and disassembled for reuse at another tritium facility. To achieve the desired results, decontamnation required repeated washing, first with organic liquids, then with water and detergents. Worker protection was provided by simple ventilation combined with careful monitoring of the work areas and employees. Several innovative techniques are described.
Date: August 8, 1979
Creator: Folkers, C. L.; Homann, S. G.; Nicolosi, A. S.; Hanel, S. L. & King, W. C.
Partner: UNT Libraries Government Documents Department
open access

US program for the immobilization of high-level nuclear wastes

Description: A program has been developed for long-term management of high-level nuclear waste. The Savannah River Operations Office of the US Department of Energy is acting as the lead office for this program with technical advice from the E.I. du Pont de Nemours and Company. The purpose of the long-term program is to immobilize the DOE high-level waste in forms that act as highly efficient barriers against radionuclide release to the disposal site and to provide technology for similar treatment of commerc… more
Date: June 8, 1979
Creator: Crandall, J. L.
Partner: UNT Libraries Government Documents Department
open access

Magnetic propulsion railguns: their design and capabilities

Description: Recent research was revived interest in electromagnetic railguns. A railgun utilizes the Lorentz force to accelerate an electrically conducting armature, which in turn accelerates a projectile. Our investigation identified the critical parameter that will lead to limits on railgun operation. These limits were incorporated in calculations of the performance of railguns. The calculations indicate that it is possible with present technology to accelerate a projectile to velocities in excess of 20 … more
Date: May 8, 1979
Creator: Hawke, R. S. & Scudder, J. K.
Partner: UNT Libraries Government Documents Department
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