UNT Libraries Government Documents Department - 15 Matching Results

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open access

Automatic gas-levitation system for vacuum deposition of laser-fusion targets

Description: An improved simple system has been developed to gas-levitate microspheres during vacuum-deposition processes. The automatic operation relies on two effects: a lateral stabilizing force provided by a centering-ring; and an automatically incremented gas metering system to offset weight increases during coating.
Date: September 8, 1981
Creator: Jordan, C. W.; Cameron, G. R.; Krenik, R. M. & Crane, J. K.
Item Type: Refine your search to only Article
open access

Bio-Oxidation of Thiocyanates Typical of Coal Conversion Effluents. Final Report

Description: Thiocyanates have been found in most coal conversion and coke plant effluents. The objectives of this study were to develop data for the biological degradation fate kinetics of thiocyanate removal, and to develop material balance information for the fate of sulfur and nitrogen resulting from such bio-decomposition of aqueous thiocyanates. A literature review of thiocyanate bio-degradation indicates that while much biochemistry information is available, little information in the biological proce… more
Date: January 8, 1981
Creator: Neufeld, R. D.; Mattson, L. & Lubon, P.
Item Type: Refine your search to only Report
open access

Combination free-electron and gaseous laser

Description: A multiple laser having one or more gaseous laser stages and one or more free electron stages is described. Each of the free electron laser stages is sequentially pumped by a microwave linear accelerator. Subsequently, the electron beam is directed through a gaseous laser, in the preferred embodiment, and in an alternative embodiment, through a microwave accelerator to lower the energy level of the electron beam to pump one or more gaseous lasers. The combination laser provides high pulse repet… more
Date: June 8, 1981
Creator: Brau, C. A.; Rockwood, S. D. & Stein, W. E.
Item Type: Refine your search to only Patent
open access

Copper-coated laser-fusion targets using molecular-beam levitation

Description: A series of diagnostic experiments at the Shiva laser fusion facility required targets of glass microspheres coated with 1.5 to 3.0 ..mu..m of copper. Previous batch coating efforts using vibration techniques gave poor results due to microsphere sticking and vacuum welding. Molecular Beam Levitation (MBL) represented a noncontact method to produce a sputtered copper coating on a single glassmicrosphere. The coating specifications that were achieved resulted in a copper layer up to 3 ..mu..m thi… more
Date: September 8, 1981
Creator: Rocke, M. J.
Item Type: Refine your search to only Article
open access

Electromagnetic velocity gauge: use of multiple gauges, time response, and flow perturbations

Description: We have developed an in-situ electromagnetic velocity (EMV) gauge system for use in multiple-gauge studies of initiating and detonating explosives. We have also investigated the risetime of the gauge and the manner in which it perturbs a reactive flow. We report on the special precautions that are necessary in multiple gauge experiments to reduce lead spreading, simplify target fabrication problems and minimize cross talk through the conducting explosive. Agreement between measured stress recor… more
Date: April 8, 1981
Creator: Erickson, L. M.; Johnson, C. B.; Parker, N. L.; Vantine, H. C.; Weingart, R. C. & Lee, R. S.
Item Type: Refine your search to only Article
open access

Evaluated nuclear data library

Description: The Lawrence Livermore National Laboratory (LLNL) collection of evaluated data for neutron-, photon-, and charged-particle-induced reactions is maintained in a computer-oriented system. In this report we recount the history of Evaluated Nuclear Data Library, describe the methods of evaluation, and give examples of input and output representation of the data.
Date: October 8, 1981
Creator: Howerton, R.J.; Dye, R.E. & Perkins, S.T.
Item Type: Refine your search to only Report
open access

Fast transient digitizer

Description: Method and apparatus are presented for sequentially scanning a plurality of target elements with an electron scanning beam modulated in accordance with variations in a high-frequency analog signal to provide discrete analog signal samples representative of successive portions of the analog signal; coupling the discrete analog signal samples from each of the target elements to a different one of a plurality of high speed storage devices; converting the discrete analog signal samples to equivalen… more
Date: July 8, 1981
Creator: Villa, F.
Item Type: Refine your search to only Patent
open access

Formulas for one-dimensional local properties for molecular-dynamics simulations of shock waves

Description: Formulas are derived for the mass, momentum, and energy densities, the xx component of the pressure tensor P/sup xx/, and the x component of the heat flux Q/sup x/. The formulas relate these local properties to the masses, positions, and velocities of the constituent particles making up the system and are in a usable form for molecular-dynamics simulations without approximation. The formulas for P/sup xx/ and Q/sup x/ avoid the infinite series found in the formulas of Irving and Kirkwood.
Date: January 8, 1981
Creator: Hardy, R.J.
Item Type: Refine your search to only Report
open access

Geothermal heating from Pinkerton Hot Springs at Colorado Timberline Academy, Durango, Colorado. Final technical report

Description: The efforts to establish a greater pool of knowledge in the field of low temperature heat transfer for the application of geothermal spring waters to space heating are described. A comprehensive set of heat loss experiments involving passive radiant heating panels is conducted and the results presented in an easily interpretable form. Among the conclusions are the facts that heating a 65 to 70 F/sup 0/ space with 90 to 100 F/sup 0/ liquids is a practical aim. The results are compared with the m… more
Date: November 8, 1981
Creator: Allen, C. C.; Allen, R. W. & Beldock, J.
Item Type: Refine your search to only Report
open access

Incorporation of chemical kinetic models into process control

Description: An important consideration in chemical process control is to determine the precise rationing of reactant streams, particularly when a large time delay exists between the mixing of the reactants and the measurement of the product. In this paper, a method is described for incorporating chemical kinetic models into the control strategy in order to achieve optimum operating conditions. The system is first characterized by determining a reaction rate surface as a function of all input reactant conce… more
Date: July 8, 1981
Creator: Herget, C.J. & Frazer, J.W.
Item Type: Refine your search to only Article
open access

Low-level-signal data acquisition for the MFTF superconducting-magnet system

Description: Acquisition of low level signals from sensors mounted on the superconducting yin-yang magnet in the Mirror Fusion Test Facility (MFTF) imposes very strict requirements on the magnet signal conditioning and data acquisition system. Of the various types of sensors required, thermocouples, strain gages, and voltage taps produce very low level outputs. These low level outputs must be accurately measured in the harsh environment of slowly varying magnetic fields, cryogenic temperatures, high vacuum,… more
Date: October 8, 1981
Creator: Montoya, C.R.
Item Type: Refine your search to only Article
open access

Methodology for Comparing the Health Effects of Electricity Generation From Uranium and Coal Fuels

Description: A methodology was developed for comparing the health risks of electricity generation from uranium and coal fuels. The health effects attributable to the construction, operation, and decommissioning of each facility in the two fuel cycle were considered. The methodology is based on defining (1) requirement variables for the materials, energy, etc., (2) effluent variables associated with the requirement variables as well as with the fuel cycle facility operation, and (3) health impact variables f… more
Date: December 8, 1981
Creator: Rhyne, W. R. & El-Bassioni, A. A.
Item Type: Refine your search to only Article
open access

Plasma effects in high frequency radiative transfer

Description: This paper is intended as a survey of collective plasma processes which can affect the transfer of high frequency radiation in a hot dense plasma. We are rapidly approaching an era when this subject will become important in the laboratory. For pedagogical reasons we have chosen to examine plasma processes by relating them to a particular reference plasma which will consist of fully ionized carbon at a temperature kT=1 KeV (10/sup 70/K) and an electron density N = 3 x 10/sup 23/cm/sup -3/, (whic… more
Date: February 8, 1981
Creator: Alonso, C.T.
Item Type: Refine your search to only Report
open access

Recruiting, Retention, and Quality in the All-Volunteer Force

Description: This report highli8hts some of the major issues of recruiting, retention, and quality raised by the transition to an All-Volunteer Force (AVF) and efforts to maintain it in the 1970s and 1980s. The strategic and political basis of current military manpower policy provides the framework for a discussion of quantitative, qualitative, and analytical and administrative issues regarding the A'TF.
Date: June 8, 1981
Creator: Goldich, Robert L.
Item Type: Refine your search to only Report
open access

Some proposed disk-heating and beam-transport experiments for heavy-ion inertial-fusion test facilities

Description: Calculations suggest that experiments relating to beam deposition, focusing and transport can be performed within the context of current design proposals for accelerator test-facilities. Since the test-facilities have lower ion kinetic energy and beam pulse power as compared to reactor drivers, we achieve high-beam intensities at the focal spot by using short focal distance and properly designed beam optics. In this regard, the low beam emittance of suggested multi-beam designs are very useful.… more
Date: June 8, 1981
Creator: Mark, J. W. K.; Bangerter, R. O.; Fawley, W. M.; Yu, S. & Wang, T. S. F.
Item Type: Refine your search to only Article
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