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High beta and second stability region transport and stability analysis

Description: This document describes ideal and resistive MHD studies of high-beta plasmas and of the second stability region. Significant progress is reported on the resistive stability properties of high beta poloidal supershot'' discharges. For these studies initial profiles were taken from the TRANSP code which is used extensively to analyze experimental data. When an ad hoc method of removing the finite pressure stabilization of tearing modes is implemented it is shown that there is substantial agreemen… more
Date: September 5, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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In-Home Performance of Exempt Pellet Stoves in Medford, Oregon.

Description: Pellet stoves that are considered exempt'' operate at an air-to-fuel ratio in excess of 35:1. They therefore qualify for exemption from the emissions certification process. A primary goal of this project was to determine how a sample of such stoves, operated in homes, would perform compared to their certified cousins,'' which were evaluated the previous year. In-home performance data documenting emissions from exempt stoves and net delivered efficiencies was particularly desired. This project e… more
Date: July 5, 1991
Creator: Barnett, Stockton G. & Fields, Paula G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Mechanisms of defect production and atomic mixing in high energy displacement cascades: A molecular dynamics study

Description: We have performed molecular dynamics computer simulation studies of displacement cascades in Cu at low temperature. For 25 keV recoils we observe the splitting of a cascade into subcascades and show that cascades in Cu may lead to the formation of vacancy and interstitial dislocation loops. We discuss a new mechanism of defect production based on the observation of interstitial prismatic dislocation loop punching from cascades at 10 K. We also show that below the subcascade threshold, atomic mi… more
Date: June 5, 1991
Creator: Diaz de la Rubia, T. & Guinan, M.W.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Ductile-Brittle Transition Temperature testing of tungsten using the three-point bend test

Description: Three-point bend tests were performed to determine the Ductile-Brittle Transition Temperatures (DBTTs) of forged and chemical vapor deposition (CVD) tungsten. Testing was performed under quasi-static conditions at temperatures between 23{degrees}C and 450{degrees}C using a forced-air environmental chamber. Load-displacement data from the three-point bend tests indicated that the constitutive behavior of the materials tested varied considerably. Finite element modeling of the three-point bend te… more
Date: March 5, 1991
Creator: Lassila, D.H.; Magness, F. & Freeman, D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Effects of doping on hybridization gapped materials

Description: Doping studies are presented on three materials exhibiting hybridization gaps: Ce{sub 3}Bi{sub 4}Pt{sub 3}, U{sub 3}Sb{sub 4}Pt{sub 3}, and CeRhSb. In the case of trivalent La, Y, or Lu substituting for Ce or U, there is a suppression of the low temperature gap and an increase in the electronic specific heat, {gamma}. In the case of tetravalent Th substitutions for U there is no change in {gamma} and in the case of tetravalent Zr substitution for Ce in CeRhSb, there is an enhanced semiconductor… more
Date: June 5, 1991
Creator: Canfield, P. C.; Thompson, J. D.; Hundley, M. F.; Lacerda, A. & Fisk, Z.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Cedar Project---Original goals and progress to date

Description: This report describes: Cedar System Hardware; Compiler and Software Issues on Memory Management; Operating Systems; Compilers; and Multiprocessor Performance on Algorithms and Applications.
Date: September 5, 1991
Creator: Cybenko, G.; Kuck, D.; Padua, D. & Gallopoulos, E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Reactor Operations Management Plan

Description: The K-Reactor last operated in April 1988. At that time, K-Reactor was one of three operating reactors at the Savannah River Site (SRS). Following an incident in P-Reactor in August 1988, it was decided to discontinue SRS reactor operation and conduct an extensive program to upgrade operating practices and plant hardware prior to restart of any of the reactors. The K-reactor was the first of three reactors scheduled to resume production. At the present time, it is the only reactor with planned … more
Date: December 5, 1991
Creator: Rice, P.D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Exploratory coprocessing research

Description: The objectives of this project were to (1) study the scope of the beneficial effects of hydrothermal pretreatment of coal on subsequent conversion, (2) identify and study the chemical or physical causes of this effect, and (3) attempt to elucidate the chemistry responsible for any coal-resid synergisms.
Date: September 5, 1991
Creator: Hirschon, A. S.; Tse, D. S.; Malhotra, R.; McMillen, D. F. & Ross, D. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Modal study of refractive effects on x-ray laser coherence

Description: The role of smoothly varying transverse gain and refraction profiles on x-ray laser intensity and coherence is analyzed by modally expanding the electric field within the paraxial approximation. Comparison with a square transverse profile reveals that smooth-edged profiles lead to: (1) a greatly reduced number of guided modes, (2) the continued cancellation of local intensity from a loosely guided mode by resonant free modes, (3) and the absence of extraneous (or anomalous) free mode resonances… more
Date: April 5, 1991
Creator: Amendt, P.; London, R.A. (Lawrence Livermore National Lab., CA (USA)) & Strauss, M. (Israel Atomic Energy Commission, Beersheba (Israel). Nuclear Research Center-Negev)
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Star-disk collisions in active galactic nuclei and the origin of the broad line region

Description: Stars of a cluster surrounding the central black hole in an AGN will collide with the accretion disk. For a central black hole of 10{sup 8} M{circle dot} and a cluster with 10{sup 7} {minus} 10{sup 8} stars within a parsec, one estimates that {approximately}10{sup 4} such collisions will occur per year. Collisions are hypersonic (Mach number M {much gt} 1). Some of the wake of the star -- the disk material shocked by its passage -- will follow it out of the disk. Such star tails'' with the esti… more
Date: December 5, 1991
Creator: Zurek, W.H.; Colgate, S.A. (Los Alamos National Lab., NM (United States)) & Siemiginowska, A. (Harvard-Smithsonian Center for Astrophysics, Cambridge, MA (United States))
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Estimating deposition velocity from atmospheric releases of iodine

Description: Deposition velocity is a parameter used in atmospheric transport models to specify the amount an atmospheric constituent transferred from the atmosphere to the surface of the earth. The material may deposit on the surface of soil, water, or vegetation. The deposition may be the result of rainfall or diffusion. A method for the calculation of deposition velocity based upon the decrease in deposition with distance from a point source is presented. The method does not require a knowledge of the ti… more
Date: February 5, 1991
Creator: Murphy, C. E. Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Confined zone dispersion flue gas desulfurization demonstration

Description: The CZD process involves flue gas post-treatment, physically located between a boiler's outlet and its particulate collector, which in the majority of cases is an electrostatic precipitator. The features that distinguish this process from other similar injection processes are: Injection of an alkaline slurry directly into the duct, instead of injection of dry solids into the duct ahead of a fabric filter. Use of an ultrafine calcium/magnesium hydroxide, type S pressure-hydrated dolomitic lime. … more
Date: September 5, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Natural gas monthly, October 1991

Description: The Natural Gas Monthly (NGM) is prepared in the Data Operations Branch of the Reserves and Natural Gas Division, Office of Oil and Gas, Energy Information Administration (EIA), US Department of Energy (DOE). The NGM highlights activities, events, and analyses of interest to public and private sector organizations associated with the natural gas industry. Volume and price data are presented each month for natural gas production, distribution, consumption, and interstate pipeline activities. Pro… more
Date: November 5, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Exploratory Coprocessing Research. Final Report, September 1988--June 1991

Description: The objectives of this project were to (1) study the scope of the beneficial effects of hydrothermal pretreatment of coal on subsequent conversion, (2) identify and study the chemical or physical causes of this effect, and (3) attempt to elucidate the chemistry responsible for any coal-resid synergisms.
Date: September 5, 1991
Creator: Hirschon, Albert S.; Tse, Doris S.; Malhotra, Ripudaman; McMillen, Donald F. & Ross, David S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Chloromethyl chlorosulfate as a voltage delay inhibitor in lithium cells

Description: Chloromethyl chlorosulfate (CMCS) is used as a passive film growth inhibitor in electrochemical cells to minimize voltage delay and low-voltage discharge. Film growth on lithium anodes is significantly diminished when CMCS is added to SOCl{sub 2} and SO{sub 2}Cl{sub 2} electrolytes of lithium batteries. The CMCS also has the effect of extending the shelf-life of Li/SOCl{sub 2} and Li/SO{sub 2}Cl{sub 2} batteries.
Date: April 5, 1991
Creator: Delnick, F. M.
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
open access

Evaluation of OPEN PLAN software: Final report

Description: In fulfilling the objectives of the contract to evaluate the suitability of the OPEN PLAN software system to process existing Environmental Restoration (ER) data, Jacobs Engineering Group (JEG) divided the effort into seven discrete tasks. Overall results of the tasks performed demonstrated that OPEN PLAN could be used in conjunction with the currently used TIMELINE to provide resource leveling and meet all reporting requirements. The OPEN PLAN report generator could automatically produce repor… more
Date: March 5, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Radioecological implications of the Par Pond drawdown

Description: The drawdown of the Par Pond reservoir created dramatic alterations in this formerly stable lentic ecosystem. In addition, the radiation environment at Par Pond has changed significantly because of the exposure of Cesium 137-contaminated sediments and the appearance of new transport pathways to the terrestrial environment. In response to this situation, SREL was asked to study the radioecological implications of the reservoir drawdown. This report contains the objectives, methods, and results o… more
Date: December 5, 1991
Creator: Hickey, H. & Whicker, F. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

D-Zero Collider Detector Cryopump Design and Operation

Description: The vacuum pumping of the CC Cryostat was anticipated to be dominated by a water vapor load. The Engineering Note 270, extrapolating from earlier experience, predicts the removal of water vapor will be the dominant pumping load and take ca. 45 days to remove at the pumping speed planned. Part of the planned pumping capability was a homemade, liquid nitrogen temperature, water vapor cryopump. This note describes the design, fabrication and performance experiences of the Cryopump described in the… more
Date: April 5, 1991
Creator: Wu, J. & Mulholland, G. T.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Estimating deposition velocity from atmospheric releases of iodine

Description: Deposition velocity is a parameter used in atmospheric transport models to specify the amount an atmospheric constituent transferred from the atmosphere to the surface of the earth. The material may deposit on the surface of soil, water, or vegetation. The deposition may be the result of rainfall or diffusion. A method for the calculation of deposition velocity based upon the decrease in deposition with distance from a point source is presented. The method does not require a knowledge of the ti… more
Date: February 5, 1991
Creator: Murphy, C. E. Jr.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Fixing the Closed Orbits in the Debuncher

Description: Without a large number of new trims the best way to fix the closed orbits in the debuncher is to move quads. There are some obvious features in the vertical orbit, Figure 1, that look like they are indeed orbit distortions. The horizontal orbit, Figure 2, also has some systematic features that can be removed by moving a small number of quads. It is likely that removing these orbit distortions will help in improving the aperture. In addition, the second order effects of such large offsets in the… more
Date: April 5, 1991
Creator: Halling, Mike
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Management-By-Objectives Plan FY 1991

Description: This administrative report is of historical interest. It covers research on Hydrothermal, Geopressured Geothermal, Hot Dry Rock systems, and the Long Valley Experimental (occasioned originally by the Magma Energy Program). (DJE 2005)
Date: June 5, 1991
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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