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Improved Approach to Characterizing and Presenting Streak Camera Performance

Description: The performance of a streak camera recording system is strongly linked to the technique used to amplify, detect and quantify the streaked image. At the Lawrence Livermore National Laboratory (LLNL) streak camera images have been recorded both on film and by fiber-optically coupling to charge-coupled devices (CCD's). During the development of a new process for recording these images (lens coupling the image onto a cooled CCD) the definitions of important performance characteristics such as resol… more
Date: July 15, 1985
Creator: Wiedwald, J. D. & Jones, B. A.
Partner: UNT Libraries Government Documents Department
open access

Status report on the Los Alamos National Laboratory Ion Beam Facility

Description: The Ion Beam Facility operated for 6000 machine hours last year, ranging in energy from 300 Kev to 24 Mev. Improvements include cryopumps replacing diffusion pumps, a rebuilding of the tandem chopper electronics and the vertical's corona charging system. Methane molecules were successfully accelerated by the vertical in quantities of hundreds of nanoamperes. Two replacement magnet power supplies on the tandem and a completely new capacitor shell regulator on the vertical are soon to be installe… more
Date: November 15, 1985
Creator: Woods, R.; Tesmer, J.; Rowton, L.; Ingalls, W.; Chaparro, G.; Goosney, G. et al.
Partner: UNT Libraries Government Documents Department
open access

Magnetic shielding for the long-pulse, pure-beam source neutralizers on the MFTF-B

Description: Present ion sources produce deuterium ions plus small amounts of impurity ions including oxygen. The oxygen current is readily trapped by the Mirror Fusion Test Facility-B (MFTF-B) plasma and represents a severe energy loss mechanism. A pure-beam source-neutralizer has been designed by LLNL for the MFTF-B. This concept uses momentum separation by closely coupling an electromagnet to the source to purify the beam. This design requires a low pressure in the neutralizer, implying a long length and… more
Date: November 15, 1985
Creator: Kerns, J.; Stone, R.; Fabyan, F. & Martin, D.
Partner: UNT Libraries Government Documents Department
open access

Application of structural-mechanics methods to the design of large tandem-mirror fusion devices (MFTF-B). Revision 1

Description: The Mirror Fusion Test Facility (MFTF-B) at Lawrence Livermore National Laboratory requires state-of-the-art structural-mechanics methods to deal with access constraints for plasma heating and diagnostics, alignment requirements, and load complexity and variety. Large interactive structures required an integrated analytical approach to achieve a reasonable level of overall system optimization. The Tandem Magnet Generator (TMG) creates a magnet configuration for the EFFI calculation of electroma… more
Date: August 15, 1985
Creator: Karpenko, V.N. & Ng, D.S.
Partner: UNT Libraries Government Documents Department
open access

Scoping studies of vapor behavior during a severe accident in a metal-fueled reactor

Description: Scoping calculations have been performed examining the consequences of fuel melting and pin failures for a reactivity-insertion type accident in a sodium-cooled, pool-type reactor fueled with a metal alloy fuel. The principal gas and vapor species released are shown to be Xe, Cs,and bond sodium contained within the fuel porosity. Fuel vapor pressure is insignificant, and there is no energetic fuel-coolant interaction for the conditions considered. Condensation of sodium vapor as it expands into… more
Date: April 15, 1985
Creator: Spencer, B.W. & Marchaterre, J.F.
Partner: UNT Libraries Government Documents Department
open access

Economic requirements for competitive laser fusion power production

Description: An economic model of a laser fusion commercial power plant is used to identify the design and operating regimes of the driver, target and reaction chamber that will result in economic competitiveness with future fission and coal plants. We find that, for a plant with a net power of 1 GW/sub e/, the cost of the driver must be less than $0.4 to 0.6 B, and the recirculating power fraction must be less than 25%. Target gain improvements at low driver energy are the most beneficial but also the most… more
Date: November 15, 1985
Creator: Hogan, W. J. & Meier, W. R.
Partner: UNT Libraries Government Documents Department
open access

Integrating quality assurance and research and development

Description: Quality assurance programs cannot be transferred from one organization to another without attention to existing cultures and traditions. Introduction of quality assurance programs constitutes a significant change and represents a significant impact on the organizational structure and operational mode. Quality assurance professionals are change agents, but do not know how to be effective ones. Quality assurance as a body of knowledge and experience can only become accepted when its practitioners… more
Date: February 15, 1985
Creator: Dronkers, J.J.
Partner: UNT Libraries Government Documents Department
open access

Progress in inertial fusion at LLNL

Description: Experiments at LLNL using the 10 TW Novette laser have led to significantly increased understanding of laser/plasma coupling. Tests using 1.06 ..mu..m, 0.53 ..mu..m and 0.26 ..mu..m light have shown increased light absorption, increased efficiency of conversion to x-rays, and decreased production of suprathermal electrons as the wavelength of the incident light decreases. The data indicate that stimulated Raman scattering is the source of the excessive hot electrons and that the effect can be c… more
Date: April 15, 1985
Creator: Storm, E.
Partner: UNT Libraries Government Documents Department
open access

Flow characteristics of the Cascade granular blanket

Description: Analysis of a single granule on a rotating cone shows that for the 35/sup 0/ half-angle, double-cone-shaped Cascade chamber, blanket granules will stay against the chamber wall if the rotational speed is 50 rpm or greater. The granules move axially down the wall with a slight (5-mm or less) sinusoidal oscillation in the circumferential direction. Granule chute-flow experiments confirm that two-layered flow can be obtained when the chute is inclined slightly above the granular material angle of … more
Date: April 15, 1985
Creator: Pitts, J.H. & Walton, O.R.
Partner: UNT Libraries Government Documents Department
open access

Recondensation of vaporized material in the Cascade ICF reactor

Description: In the Cascade inertial fusion reactor, the innermost blanket zone consists of solid granules of C or BeO. The x rays from a fusion pulse of 300 MJ will vaporize up to 1 kg of material. The temperature of this vaporized material may reach 1 to 2 electron volts. The CONRAD code was used to calculate the energy and mass exchange between this hot plasma and the cold wall until complete recondensation of the material reduces the chamber particle density to 3 x 10 V cm T, which is required for propa… more
Date: November 15, 1985
Creator: Hogan, William J. & Peterson, Robert R.
Partner: UNT Libraries Government Documents Department
open access

Technical considerations for flexible piping design in nuclear power plants

Description: The overall objective of this research project is to develop a technical basis for flexible piping designs which will improve piping reliability and minimize the use of pipe supports, snubbers, and pipe whip restraints. The current study was conducted to establish the necessary groundwork based on the piping reliability analysis. A confirmatory piping reliability assessment indicated that removing rigid supports and snubbers tends to either improve or affect very little the piping reliability. … more
Date: March 15, 1985
Creator: Lu, S.C. & Chou, C.K.
Partner: UNT Libraries Government Documents Department
open access

Development of the cascade inertial-confinement-fusion reactor

Description: Cascade, originally conceived as a football-shaped, steel-walled reactor containing a Li/sub 2/O granule blanket, is now envisaged as a double-cone-shaped reactor containing a two-layered (three-zone) flowing blanket of BeO and LiAlO/sub 2/ granules. Average blanket exit temperature is 1670/sup 0/K and gross plant efficiency (net thermal conversion efficiency) using a Brayton cycle is 55%. The reactor has a low-activation SiC-tiled wall. It rotates at 50 rpm, and the granules are transported to… more
Date: April 15, 1985
Creator: Pitts, J.H.
Partner: UNT Libraries Government Documents Department
open access

Numerical determination of injector design for high beam quality

Description: The performance of a free electron laser strongly depends on the electron beam quality or brightness. The electron beam is transported into the free electron laser after it has been accelerated to the desired energy. Typically the maximum beam brightness produced by an accelerator is constrained by the beam brightness deliverd by the accelerator injector. Thus it is important to design the accelerator injector to yield the required electron beam brightness. The DPC (Darwin Particle Code) comput… more
Date: October 15, 1985
Creator: Boyd, J.K.
Partner: UNT Libraries Government Documents Department
open access

Optimum ranges for x-ray thickness measurements

Description: Film thicknesses can be measured by two x-ray methods: x-ray absorption (gauging or radiography) and x-ray fluorescence. Optimization of both methods is discussed.
Date: October 15, 1985
Creator: Ryon, R.W.
Partner: UNT Libraries Government Documents Department
open access

Analysis of plutonium gamma-ray spectra by small portable computers

Description: A sophisticated program for isotopic analysis of plutonium gamma-ray spectra using small computers has been developed. It is implemented on a DEC LSI-11/2 configured in a portable unit without a mass storage device for use by IAEA inspectors in the field. Only the positions of the 148-keV /sup 241/Pu and 208-keV /sup 237/U peaks are needed as input. Analysis is completed in 90 seconds by fitting isotopic component response functions to peak multiplets. 9 refs., 2 figs., 1 tab.
Date: May 15, 1985
Creator: Ruhter, W.; Gunnink, R.; Camp, D. & DeCarolis, M.
Partner: UNT Libraries Government Documents Department
open access

Fast Flux Test Facility replacement of a primary sodium pump

Description: The Fast Flux Test Facility is a 400 MW Thermal Sodium Cooled Fast Reactor operated by Westinghouse Hanford Company for the US Department of Energy. During startup testing in 1979, the sodium level in one of the primary sodium pumps was inadvertently raised above the normal height. This resulted in distortion of the pump shaft. Pump replacement was carried out using special maintenance equipment. Nuclear radiation and contamination were not significant problems since replacement operations were… more
Date: November 15, 1985
Creator: Krieg, S.A. & Thomson, J.D.
Partner: UNT Libraries Government Documents Department
open access

Pulse Star inertial confinement fusion reactor

Description: Pulse Star is a pool-type ICF reactor that emphasizes low cost and high safety levels. The reactor consists of a vacuum chamber (belljar) submerged in a compact liquid metal (Li/sub 17/Pb/sub 83/ or lithium) pool which also contains the heat exchangers and liquid metal pumps. The shielding efficiency of the liquid metal pool is high enough to allow hands-on maintenance of (removed) pumps and heat exchangers. Liquid metal is allowed to spray through the 5.5 m radius belljar at a controlled rate,… more
Date: April 15, 1985
Creator: Blink, J. A. & Hogan, W. J.
Partner: UNT Libraries Government Documents Department
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