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Schemes for anti pp interactions at ISABELLE

Description: Various schemes for obtaining anti pp interactions are outlined, and the luminosities obtainable for each case calculated. In the simplest realistic case, a luminosity of 1.3 x 10/sup 29/ is obtained with a 13 hour filling time. The addition of special rf systems in both the AGS and ISABELLE give a scheme with luminosity 8 x 10/sup 29/ in 6 hours. The use of stochastic cooling to stack raises the luminosity to as high as 10/sup 31/ but the filling time is then 68 hours. Finally a scheme is cons… more
Date: September 8, 1977
Creator: Palmer, Robert B.
Partner: UNT Libraries Government Documents Department
open access

Computer program SCAP-BR for gamma-ray streaming through multi-legged ducts

Description: A computer program, SCAP-BR, has been developed at Burns and Roe for the gamma-ray streaming analysis through multi-legged ducts. SCAP-BR is a modified version of the single scattering code, SCAP, incorporating capabilities of handling multiple scattering and volumetric source geometries. It utilizes the point kernel integration method to calculate both the line-of-sight and scattered gamma dose rates by employing the ray tracing technique through complex shield geometries. The multiple scatter… more
Date: December 8, 1977
Creator: Byoun, T. Y.; Babel, P. J. & Dajani, A. T.
Partner: UNT Libraries Government Documents Department
open access

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

Potential contribution of solar energy in the Northwest

Description: Estimates on the ability of solar energy to supply US energy needs vary from 0 to 25%. It is generally thought that solar can supply as much as we want it to up to 25% in the Northwest by the year 2000 providing an all-out effort is applied now to develop solar energy. The factors affecting the extent of solar utilization are discussed; they are more institutional (inertia, experience, legal, social) than technological or economical. Because of its climate, unique power system, and amount of su… more
Date: November 8, 1978
Creator: Drumheller, K.
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

Fusion reactor requirements and systems for energy storage and transfer

Description: Energy storage and transfer requirements for many of the present day reactor systems are listed. Two ohmic heating (OH) requirements, those for toroidal Z-pinches and Tokamaks, are described in more detail. Technologies envisioned for the power conditioning circuitry are discussed.
Date: May 8, 1978
Creator: Thomassen, K.I.; Hagenson, R.L. & Thullin, P.
Partner: UNT Libraries Government Documents Department
open access

High performance inertial fusion targets

Description: Inertial confinement fusion (ICF) target designs are considered which may have very high gains (approximately 1000) and low power requirements (< 100 TW) for input energies of approximately one megajoule. These include targets having very low density shells, ultra thin shells, central ignitors, magnetic insulation, and non-ablative acceleration.
Date: August 8, 1978
Creator: Nuckolls, J.H.; Bangerter, R.O.; Lindl, J.D.; Mead, W.C. & Pan, Y.L.
Partner: UNT Libraries Government Documents Department
open access

Physics of field reversed mirrors

Description: Since the earliest days of fusion research it has been hoped that diamagnetic currents flowing in a plasma could be used to help confine the plasma. Recently this hope has been strengthened both by theoretical advances and by experimental results made possible by technological developments. On the theoretical front analytical treatments and computer simulation studies have demonstrated equilibrium solutions existing both in the fluid limit and in the large-orbit limit. Progress has also been ma… more
Date: September 8, 1978
Creator: Post, Richard F.
Partner: UNT Libraries Government Documents Department
open access

Response of Inconel 600 to simulated fusion reactor irradiation

Description: Inconel 600 was irradiated in HFIR to provide a partial simulation of fusion reactor service. Samples were irradiated at 55 to 700/sup 0/C, to investigate swelling and postirradiation tensile properties as a function of irradiation and test temperatures under conditions of concurrent displacement damage and helium production. Helium contents from 600 to 1800 appm and displacement levels of 4 to 9 dpa were achieved, and the results are used to estimate performance in a fusion reactor environment… more
Date: September 8, 1978
Creator: Wiffen, F.W.
Partner: UNT Libraries Government Documents Department
open access

Mirror fusion test facility

Description: The MFTF is a large new mirror facility under construction at Livermore for completion in 1981--82. It represents a scaleup, by a factor of 50 in plasma volume, a factor of 5 or more in ion energy, and a factor of 4 in magnetic field intensity over the Livermore 2XIIB experiment. Its magnet, employing superconducting NbTi windings, is of Yin-Yang form and will weigh 200 tons. MFTF will be driven by neutral beams of two levels of current and energy: 1000 amperes of 20 keV (accelerating potential… more
Date: September 8, 1978
Creator: Post, Richard F.
Partner: UNT Libraries Government Documents Department
open access

Predicting explosion-generated permeability around geothermal wells

Description: A theoretical expression showing the radial dependence of permeability in geologic media as a function of the distance from the point of detonation has been derived. This relationship shows that created permeability decreases as a function of radius (1/r/sup 5/ around a spherical blast and 1/r/sup 4/ around a cylindrical shot). Excellent correlation was found when this prediction was compared with permeability measurements made around the site of the Hardhat nuclear event fired in granodiorite … more
Date: January 8, 1976
Creator: McKee, C. R. & Hanson, M. E.
Partner: UNT Libraries Government Documents Department
open access

Evaluation of metal-foil strain gages for cryogenic application in magnetic fields

Description: The requirement for the design and construction of large superconducting magnet systems for fusion research has raised a number of new questions regarding the properties of composite superconducting conductors. One of these, the effect of mechanical stress on the current-carrying capacity of Nb/sub 3/Sn, is of major importance in determining the feasibility of constructing large magnets with this material. A typical experiment for determining such data involves the measurement of critical curre… more
Date: July 8, 1977
Creator: Freynik, H. S. Jr.; Roach, D. R.; Deis, D. W. & Hirzel, D. G.
Partner: UNT Libraries Government Documents Department
open access

High pressure apparatus for hydrogen isotopes to pressures of 345 MPa (50,000 psi) and temperatures of 1200/sup 0/C

Description: A functional new high pressure, high temperature apparatus for hydrogen isotopes uses an internally heated pressure vessel within a larger pressure vessel. The pressure capability is 345 MPa (50 K psi) at 1200/sup 0/C. The gas pressure inside the internal vessel is balanced with gas pressure in the external vessel. The internal vessel is attached to a closure and is also the sample container. Our design allows thin-walled internal vessel construction and keeps the sample from ''seeing'' the fur… more
Date: June 8, 1977
Creator: Lakner, J. F.
Partner: UNT Libraries Government Documents Department
open access

Measurements of neutron-induced fission cross-section ratios involving isotopes of uranium and plutonium. [0. 001 to 30 MeV, cross sections]

Description: A procedure, called the threshold cross section method was applied to our experimental data involving four uranium (/sup 233/U /sup 234/U, /sup 236/U, and /sup 238/U) and five plutonium (/sup 239/Pu, /sup 240/Pu, /sup 241/Pu, /sup 242/Pu, and /sup 244/Pu) isotopes to determine ratios of fission cross sections relative to /sup 235/U. The data were gathered using ionization fission chambers and the time-of-flight technique at the LLL 100-MeV electron linear accelerator: measurements span the neut… more
Date: June 8, 1976
Creator: Behrens, J. W. & Carlson, G. W.
Partner: UNT Libraries Government Documents Department
open access

1/5-scale experiment of a Mark I boiling-water reactor pressure-suppression system under hypothetical LOCA conditions

Description: Experimental results show the sensitivity of hydrodynamically generated vertical loads to changes in the drywell pressurization rate, downcomer submergence, and vent-line loss coefficient. Insignificant effects on peak vertical loads were observed when the vent-line loss was varied. Peak vertical loads can be reduced by adding initial drywell overpressure so that the downcomers are partly cleared of water. Spatial variation of pressure at about the time of vent clearing is seen in comparisons o… more
Date: July 8, 1977
Creator: Pitts, J. H. & McCauley, E. W.
Partner: UNT Libraries Government Documents Department
open access

Semi-automated x-ray gauging process control system. [For pressed-material components]

Description: An x-ray gauging method was developed and a production gauging system was subsequently fabricated to control the quality of precision manufactured components. The gauging system measures via x-ray absorption the density of pressed finely divided solids held in a dissimilar container. The two dissimilar materials condition necessitated a ''two scan'' technique: first, the x-ray attenuation (absorption) of the empty container prior to loading and then, the attenuation of the loaded container are … more
Date: October 8, 1976
Creator: Draut, C. F. & Homan, D. A.
Partner: UNT Libraries Government Documents Department
open access

Multi-step laser spectroscopy in atomic uranium. [Crossed beams]

Description: The use of multistep photoionization techniques to measure lifetimes, cross sections, and branching ratios in uranium is described. The measurement of autoionization behavior, the assignment of new levels, and the observation of Rydberg states are also described. Experimental data are presented for all parameters. (auth)
Date: December 8, 1975
Creator: Solarz, R. W.; Paisner, J. A.; Carlson, L. R.; May, C. A. & Johnson, S. A.
Partner: UNT Libraries Government Documents Department
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