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in creator/contributor: "Bennett, G. A."  
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Conceptual design of a heat pipe radiator

Description: A conceptual design of a waste heat radiator has been developed for a thermoelectric space nuclear power system. The basic shape of the heat pipe radiator was a frustum of a right circular cone. The design included stringer heat pipes to carry reject heat from the thermoelectric modules to the radiator skin that was composed of small-diameter, thin-walled cross heat pipes. The stringer heat pipes were armored to resist puncture by a meteoroid. The cross heat pipes were designed to provide the n… more
Date: September 1, 1977
Creator: Bennett, G. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Upgrades in Thermal Protection for Downhole Instruments

Description: Measurement of geophysical parameters in progressively deeper and hotter wells has prompted design changes that improve the performance of downhole instruments and their associated thermal protection systems. This report provides a brief description of the mechanical and thermal loads to which these instruments and systems are subjected. Each design change made to the passive thermal protection system is described along with its resulting improvement. An outline of work being done to scope an a… more
Date: January 1, 1985
Creator: Bennett, G. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Pyrographite Water-Cooled Target Analysis

Description: This report presents a study of two pyrographic water-cooled targets planned for use in the Clinton P. Anderson Meson Physics Facility. A steady-state thermal stress analysis was done that included a parameter study on the physical and numerical variables that affect the problem. The maximum target temperatures and stresses were calculated and compared for a variety of conditions. The comparisons show that the 0.6-cm half-width fin target proposed for the A-2 line is the most vulnerable of the … more
Date: September 1, 1980
Creator: Bennett, G. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Active Cooling for Downhole Instrumentation: Preliminary Analysis and System Selection

Description: A feasibility study and a series of preliminary designs and analyses were done to identify candidate processes or cycles for use in active cooling systems for downhole electronic instruments. A matrix of energy types and their possible combinations was developed and the energy conversion process for each pari was identified. The feasibility study revealed conventional as well as unconventional processes and possible refrigerants and identified parameters needing further clarifications. A concep… more
Date: March 1, 1988
Creator: Bennett, G. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Active Cooling for Downhole Instrumentation: Design Criteria and Conceptual Design Summary

Description: This report summarizes the results of a literature survey that describes successful tests of geophysical instruments and their thermal protection systems. The conditions to which an instrument is subjected are formulated into relevant thermal and mechanical design criteria that have proved useful for improving passive thermal protection systems and selecting the preliminary feasibility of active refrigeration systems. A brief summary of the results of a series of conceptual designs on seven dif… more
Date: May 1, 1986
Creator: Bennett, G. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Thermal Design for Protection of Downhole Electronic Packages

Description: Design improvements made for downhole tools based on results obtained from the thermal analysis of the instrument package are described. Results include heat flux at the tool surface and temperature-time histories of each subsystem. The research stems from a need for tools that can survive the harsh environment present in geothermal wellbores. The high temperatures and pressures create stress on the tools that function in this environment. Improvements in the design of downhole tools lead to mo… more
Date: January 1, 1983
Creator: Bennett, G. A. & Sherman, G. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Analysis and Thermal-Design Improvements of Downhole Tools for Use in Hot-Dry Wells

Description: Design improvements made for downhole thermal protection of systems based on results obtained from the analysis of the electronics, heat sink, and dewar packaged in a steel tubular body are described. Results include heat flux at the tool surface, temperature-time histories of each subsystem and isotherm contour plots during the simulation. The analysis showed that the thermal potential between the electronics and the heat sink was in the wrong direction and also was too small to remove heat en… more
Date: February 1, 1983
Creator: Bennett, G. A. & Sherman, G. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Compact acoustic refrigerator

Description: This invention is comprised of a compact acoustic refrigeration system that actively cools components, e.g., electrical circuits, in a borehole environment. An acoustic engine includes first thermodynamic elements for generating a standing acoustic wave in a selected medium. An acoustic refrigerator includes second thermodynamic elements located in the standing wave for generating a relatively cold temperature at a first end of the second thermodynamic elements and a relatively hot temperature … more
Date: December 31, 1991
Creator: Bennett, G. A.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
open access

Selection of Power Plant Elements for Future Reactor Space Electric Power Systems

Description: Various types of reactor designs, electric power conversion equipment, and reject-heat systems to be used in nuclear reactor power plants for future space missions were studied. The designs included gas-cooled, liquid-cooled, and heat-pipe reactors. For the power converters, passive types such as thermoelectric and thermionic converters and dynamic types such as Brayton, potassium Rankine, and Stirling cycles were considered. For the radiators, heat pipes for transfer and radiating surface, pum… more
Date: September 1, 1979
Creator: Buden, D.; Bennett, G. A. & Copper, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Literature Search on Chemical Reduction of Uranium Oxides

Description: Reduction of the oxide formed in the slagging operation has been suggested as a possible means of increasing the overall ingot recovery. The various reduction methods which have been investigated are reduction with calcium, magnesium, and carbon. Details of each method are discussed in this paper.
Date: unknown
Creator: Bennett, G. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

In situ mechanical-radiation effects test capsule for simulating fusion material environments

Description: Conditions of radiation and simultaneous cyclic stress on materials are inherent in advanced energy source designs such as inertially and magnetically confined controlled thermonuclear reactors. A test capsule capable of applying a cyclic stress to test specimens while they are being irradiated in the 800-MeV proton beam at the Clinton P. Anderson Los Alamos Meson Physics Facility has been developed. The design and performance of this device are discussed in this report. This machine has facili… more
Date: January 1, 1981
Creator: Christensen, K. E.; Bennett, G. A. & Sommer, W. F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Ventilation systems analysis during tornado conditions. Progress report, July--December 1975. [Depressurization effects]

Description: A review of some existing digital simulations of fluid systems, a brief description of the proposed generalized computer code, a description of, and results from, two solution techniques, and a sample test case ventilation system are presented. The review of some fluid system simulations covers methods and techniques for development of a more general digital solution technique than the successive substitution method used in previous analyses. The structure and organization of the computer code … more
Date: April 1, 1976
Creator: Gregory, W. S.; Duerre, K. H. & Bennett, G. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Analytical and Numerical Solution of One- and Two-Dimensional Steady Heat Transfer in a Coldplate

Description: We develop analytical models for steady-state, one- and two-dimensional heat transfer in a single-material, flat-plate coldplate. Discrete heat sources are mounted on one side of the plate and heat transfer to a flowing fluid occurs on the other. The models are validated numerically using finite differences. We propose a simple procedure for estimating maximum coldplate temperature at the location of each heat source which includes thermal interaction among the sources. Results from one model a… more
Date: January 1, 1987
Creator: Jones, G. F.; Bennett, G. A. & Bultman, D. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Ventilation systems analysis during tornado conditions. Progress report, January--June 1975

Description: The principal concern of this investigation is to develop the capability to simulate the dynamic effects of a tornado depressurization on a ventilation system. The basic formulation and solution of the two-zone series model ventilation subsystem is based on lumped parameter component response equations, the isothermal compression of air, and the conservation of mass. Solutions based on these assumptions are also presented for the two-zone series model with natural bypass, the two-zone series mo… more
Date: November 1, 1975
Creator: Bennett, G. A.; Gregory, W. S. & Smith, P. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Rail-gap switch modifications and test data for the Atlas capacitor bank

Description: Atlas is a facility being designed at the Los Alamos National Laboratory (LANL) to perform high energy-density experiments in support of weapons-physics and basic-research programs. The capacitor bank design consists of a 36-MJ array of 240-kV Marx modules. The system is designed to deliver a peak current of 45- to 50-MA with a 4- to 5-us risetime. Evaluation, testing and qualification of key components of the Marx module are being conducted. One key element of the Marx module is the low induct… more
Date: September 1, 1997
Creator: Lopez, E. A.; Bennett, G. A. & Bartsch, R. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Properties and Handling Practices for Magnesium: A Literature Survey

Description: A survey of Mg including the cost and availability of various high- purity grades, safe handling considerations, methods of distillation and production physical and thermodynamic properties, and the binary and ternary alloys is presented. A bibliography is included with 157 references. (J.R.D.)
Date: March 1, 1958
Creator: Breederman, M.; Bennett, G. A.; Burris, L. Jr.; Dillon, I. G.; Winsch, I. O.; Nathans, M. W. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Atlas Pulsed Power System: a Driver for Multi-Megagauss Fields

Description: Atlas is a pulsed power machine designed for hydrodynamic experiments for the Los Alamos High Energy Density Physics Experimental program. It is presently under construction and should be operational in late 2000. Atlas will store 23 MJ at an erected voltage of 240 kV. This will produce a current of 30 MA into a static load and as much as 32 MA into a dynamic load. The current pulse will have a rise time of {approximately}5{micro}s and will produce a magnetic field driving the impactor liner of… more
Date: October 18, 1998
Creator: Cochrane, J. C.; Bartsch, R. R.; Bennett, G. A.; Bowman, D. W.; Davis, H. A.; Ekdahl, C. A. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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