UNT Libraries Government Documents Department - 30 Matching Results

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ac-resistance-measuring instrument

Description: An auto-ranging ac resistance measuring instrument for remote measurement of the resistance of an electrical device or circuit connected to the instrument includes a signal generator which generates an ac excitation signal for application to a load, including the device and the transmission line, a monitoring circuit which provides a digitally encoded signal representing the voltage across the load, and a microprocessor which operates under program control to provide an auto-ranging function by… more
Date: April 22, 1981
Creator: Hof, P. J.
Item Type: Refine your search to only Patent
open access

Applications of intelligent-measurement systems in controlled-fusion research

Description: The paper describes the control and instrumentation for the Mirror Fusion Test Facility at the Lawrence Livermore National Laboratory, California, USA. This large-scale scientific experiment in controlled thermonuclear fusion, which is currently being expanded, originally had 3000 devices to control and 7000 sensors to monitor. A hierarchical computer control system, is used with nine minicomputers forming the supervisory system. There are approximately 55 local control and instrumentation micr… more
Date: June 22, 1981
Creator: Owen, E. W.; Shimer, D. W.; Lindquist, W. B.; Peterson, R. L. & Wyman, R. H.
Item Type: Refine your search to only Article
open access

Catalytic-cartridge SO/sub 3/ decomposer

Description: A catalytic cartridge internally heated is utilized as a SO/sub 3/ decomposer for thermochemical hydrogen production. The cartridge has two embodiments, a cross-flow cartridge and an axial flow cartridge. In the cross-flow cartridge, SO/sub 3/ gas is flowed through a chamber and incident normally to a catalyst coated tube extending through the chamber, the catalyst coated tube being internally heated. In the axial-flow cartridge, SO/sub 3/ gas is flowed through the annular space between concent… more
Date: May 22, 1981
Creator: Galloway, Terry R.
Item Type: Refine your search to only Patent
open access

Chemical Warfare: Background And Issues

Description: This report concerns the renewed effort to modernize and expand the current US retaliatory chemical stockpile with binary munitions, which emerged in 1981. The effort is prompted by concern over the continued Soviet emphasis on chemical warfare capabilities. The report also documents the consistent Soviet refusal to accept a chemical warfare disarmament treaty.
Date: June 22, 1981
Creator: Kallis, E. M.
Item Type: Refine your search to only Report
open access

Colliding droplets: a short film presentation

Description: A series of experiments were performed in which liquid droplets were caused to collide. Impact velocities to several meters per second and droplet diameters up to 600 micrometers were used. The impact parameters in the collisions vary from zero to greater than the sum of the droplet radii. Photographs of the collisions were taken with a high speed framing camera in order to study the impacts and subsequent behavior of the droplets. The experiments will be discussed and a short movie film presen… more
Date: December 22, 1981
Creator: Hendricks, C.D.
Item Type: Refine your search to only Article
open access

Contrasts in One- and Two-Dimensional Hydrocode Calculations of Laser-Generated Shockwaves in Disk Targets

Description: A comparison is made between 1D and 2D hydrocode calculations and some recent experimental results on laser-driven planar shockwaves in disk targets. A simple model is described which accounts for the trends seen in the calculations and which gives insight into the regime of laser intensity and pulse duration where two-dimensional effects become significant in these experiments.
Date: June 22, 1981
Creator: Harrach, R. J.; Lee, Y. T.; Trainor, R. J.; Holmes, N. C.; Rosen, M. D.; Banner, D. L. et al.
Item Type: Refine your search to only Article
open access

Development of a high-density energy-storage capacitor for Nova

Description: This paper covers Maxwell's approach to developing energy storage capacitors. Based on previous capacitor designs of 3 KJ, 5 KJ and 10 KJ, the final Nova 12.5 KJ capacitor evolved. At the outset of the Nova capacitor development program, a relatively new dielectric system, polypropylene-paper-DOP, seemed to show superiority in volumetric efficiency, life, and more importantly cost. However, as a result of studies performed at Maxwell, a high-density, energy-storage capacitor was developed utili… more
Date: October 22, 1981
Creator: Haskell, D. K.; Cooper, R. A.; Sevigny, J. A.; Merritt, B. T.; Carder, B. M. & Whitham, K.
Item Type: Refine your search to only Article
open access

Engineering problems of tandem-mirror reactors

Description: We have completed a comparative evaluation of several end plug configurations for tandem mirror fusion reactors with thermal barriers. The axi-cell configuration has been selected for further study and will be the basis for a detailed conceptual design study to be carried out over the next two years. The axi-cell end plug has a simple mirror cell produced by two circular coils followed by a transition coil and a yin-yang pair, which provides for MHD stability. This paper discusses some of the m… more
Date: October 22, 1981
Creator: Moir, R.W.; Barr, W.L. & Boghosian, B.M.
Item Type: Refine your search to only Article
open access

Engineering problems of the fusion breeder

Description: A study of fission suppressed blankets for the tandem mirror not only showed such blankets to be feasible but also to be safer than fissioning blankets. Such hybrids could produce enough fissile material to support up to 17 light water reactors of the same nuclear power rating. Beryllium was compared to /sup 7/Li for neutron multiplication; both were considered feasible but the blanket with Li produced 20% less fissile fuel per unit of nuclear power in the reactor. The beryllium resource, while… more
Date: October 22, 1981
Creator: Moir, R. W.; Lee, J. D. & Barr, W. L.
Item Type: Refine your search to only Article
open access

Explosive reaction of cased charges generated by impacts of. 30 calibre bullets

Description: Several high explosive formulations have recently been compared in a series of impact tests where samples of each composition were encased in a test fixture designed in flat geometry mocking an HE loaded artillery projectile. The purpose of the ongoing test series is to determine the relative rate of chemical energy release or explosiveness of several standard and research insensitive high explosive (IHE) main charge compositions. The triggering stimulus is the impact of .30 calibre ball bullet… more
Date: July 22, 1981
Creator: Honodel, C A
Item Type: Refine your search to only Article
open access

Framework for the systematic assessment of a material control and accounting system

Description: Procedures are described for the systematic assessment of a Material Control and Accounting (MC and A) system, in terms of compliance to the proposed MC and A Upgrade Rule. The applicability of these assessment procedures to specific Rule provisions is discussed. Special attention is given to the statistical performance of individual subsystems, and their vulnerability to compromise by insider collusion.
Date: April 22, 1981
Creator: Schechter, R. S. & Sacks, I. J.
Item Type: Refine your search to only Report
open access

Long-range-ordered alloys modified by Group IV-B metals

Description: Ductile long range ordered alloys having high critical ordering temperatures exist in the (V,M)(Fe,Ni,Co)/sub 3/ system having the composition comprising by weight 20.6 to 22.6% V, 14 to 50% Fe, 0 to 64% Co, and 0 to 40% Ni, and 0.4 to 1.4% M, where M is a metal selected from the group consisting of Ti, Zr, Hf, and their mixtures. These modified alloys have an electron density no greater than 8.00 and exhibit marked increases at elevated temperature in ductility and other mechanical properties … more
Date: May 22, 1981
Creator: Liu, Chain T.; Inouye, Henry & Schaffhauser, Anthony C.
Item Type: Refine your search to only Patent
open access

Measured and projected performance of plasma direct converters

Description: Test results from two plasma direct converters and their predicted cost and performance on tandem mirror fusion reactors are present. The tests were done at high power density (approx. 70 W/cm/sup 2/) in steady state to simulate the predicted conditions in a reactor. A single stage unit and a two-stage unit of the Venetian blind type were tested at up to 100 kV and 6 kW for a total time of about 80 hours. Measured efficiencies, when projected to a reactor, are typically about 50% for a single s… more
Date: October 22, 1981
Creator: Barr, W.L. & Moir, R.W.
Item Type: Refine your search to only Article
open access

Method of recovery of alkali-metal constituents from coal-conversion residues. [Patent application]

Description: A coal gasification operation or similar conversion process is carried out in the presence of an alkali metal-containing catalyst producing char particles containing alkali metal residues. Alkali metal constituents are recovered from the particles by burning the particles to increase their size and density and then leaching the particles of increased size and density with water, to extract the water-soluble alkali metal constituents.
Date: April 22, 1981
Item Type: Refine your search to only Patent
open access

MFTF-B electron-cyclotron-resonance heating system

Description: The MFTF-B ECRH system will provide 1.6-MW of microwave power for heating of electrons within the thermal barrier and potential maximum regions of the plasma end-plugs. Absorption of this radiation increases the resonant electron energy which locally alters the electrostatic confining potential within the plasma. The result is a thermal barrier which will isolate end-plug electrons from those in the solenoid thus increasing the plasma confinement time. Microwave energy will be generated by eigh… more
Date: October 22, 1981
Creator: Krause, K. H.; Pollock, G. G. & Yugo, J. J.
Item Type: Refine your search to only Article
open access

Mitigation of biofouling using coatings. Quarterly progress report No. 3

Description: Progress is reported in a project in which the objectives are to evaluate benefits associated with control of the surface energetic properties of materials used in heat exchangers, and to identify preferred ranges of these surface conditions that minimize deposits of biological fouling known to deteriorate heat exchange efficiencies in seawater, brackish water and freshwater systems. The technical approach employed uses special diagnostic plates in novel flow cells where fluid flow conditions c… more
Date: June 22, 1981
Creator: Meyer, A. E. & King, R. W.
Item Type: Refine your search to only Report
open access

Orbit averaged radial buildup code for tandem mirror geometry

Description: The radial Fokker-Planck (RFP) model of A. Futch was modified to treat plasma buildup in the tandem mirror plug and center cell with a self-consistent model (TOARBUC). Two major changes have been made to the original version of this code. First, the center cell is treated as having separate electron and ion confining potentials with the ion potential having the opposite sign of that in a conventional mirror. Second, a two-electron-temperature treatment derived by R. Cohen was included in the pr… more
Date: January 22, 1981
Creator: Campbell, M. & Futch, A.H.
Item Type: Refine your search to only Report
open access

Production and loss of H/sup -/ and D/sup -/ in the volume of a plasma

Description: The study of the production and loss of negative ions, H/sup -/ and D/sup -/, in the volume of a plasma has received considerable attention since the measurement of anomalously high densities of H/sup -/ in 1977. The most probable mechanism for production is dissociative attachment (DA) to vibrationally highly-excited hydrogen molecules. New diagnostics developed for this purpose are photodetachment and the extension of coherent anti-Stokes Raman scattering (CARS) systems to the sensitivity req… more
Date: October 22, 1981
Creator: Hamilton, G.W. & Bacal, M.
Item Type: Refine your search to only Article
open access

Review of draft HTGR-SC/C design and technology development plans

Description: GCRA has approached the initial review of the subject plans from the vantage of Utility/User interests in an HTGR-SC/C Lead Project as characterized in the HTGR-SC/C Lead Project Plan. At their current stage of development, the plans are considered to represent the early views of General Atomic Company, acting as a potential NSSS vendor, on the effort necessary to design and license an HTGR-SC/C plant. As such, these plans embody GA's perception of the level of technical development and demonst… more
Date: September 22, 1981
Item Type: Refine your search to only Report
open access

Role of molecular dynamics on descriptions of shock-front processes

Description: By means of a computational approach based on classical molecular dynamics, we can begin to form a realistic picture of shock-induced processes occurring at the shock front and resulting from the detailed, violent motion associated with shock motion on an atomic scale. Prototype studies of phase transitions will be discussed. We will also examine the interaction of the shock front with defects, surfaces, voids, and inclusions, and across grain boundaries. We will focus on the critical question … more
Date: July 22, 1981
Creator: Karo, A.M.
Item Type: Refine your search to only Article
open access

Single-pass continuous-flow leach test of PNL 76-68 glass: some selected Bead Leach I results

Description: A single-pass continuous-flow leach test of PNL 76-68 glass beads (7 mm dia) was concluded after 420 days of uninterrupted operation. Variables included in the experimental matrix were flow-rate, leachant composition, and temperature. Analysis was conducted on all leachate samples for /sup 237/Np and /sup 239/Pu as well as a number of nonradioactive elements. Results indicated that flow-rate and leachant systematically affected the leach rate, but only slightly. Temperature effects were signifi… more
Date: January 22, 1981
Creator: Coles, D. G.
Item Type: Refine your search to only Article
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