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3-10 keV and 0. 1- to 2-MeV observations of four gamma-ray bursts
Four catalogued ..gamma..-ray bursts that occurred between 79/3/7 and 79/7/31 have been observed over the 3 to 10 keV range by a joint NRL/Los Alamos experiment on the Air Force P78-1 satellite. The bursts were also well observed by members of the interplanetary network. In this paper we present hardness ratios, x-ray/..gamma..-ray luminosity ratios, and time histories. The most significant results presented herein can be summarized as follows: (1) gamma-ray bursters can emit fairly strongly at x-ray energies near the time of the ..gamma.. burst with L/sub x//L/sub ..gamma../ approx. .02 (L/sub x/ approx. 10/sup 37/ ergs s/sup -1/, 3 to 10 keV, assuming a distance of 1 kpc); (2) the centroid of the x-ray emission generally lags the ..gamma..-ray centroid, but there is also evidence for one or more types of x-ray precursor activity; (3) the ..gamma..-ray hardness ratios were not highly variable for these particular events. However, there is some evidence that the ..gamma..-ray spectra softened near the ends of the bursts when the x-ray/..gamma..-ray ratios were high; (4) the x-ray/..gamma..-ray power law number index during times of the strongest ..gamma..-ray emission ranged from 0.8 to approx. 1.1 for the four bursts; (5) the x-ray tail of GB790307 …
Date:
January 1, 1983
Creator:
Laros, J. G.; Evans, W. D.; Fenimore, E. E.; Klebesadel, R. W.; Shulman, S. & Fritz, G.
Object Type:
Article
System:
The UNT Digital Library
3-D resistive MHD calculations for tokamak plasmas: beyond the simple reduced set of equations
Numerical studies of the resistive stability of tokamak plasmas in cylindrical geometry have been performed using: (1) the full set of resistive Magnetohydrodynamic (MHD) equations and (2) an extended version of the reduced set of resistive MHD equations including diamagnetic and electron temperature effects. In particular, the nonlinear interaction of tearing modes of many helicities has been investigated. The numerical results confirm many of the features uncovered previously using the simple reduced equations.
Date:
January 1, 1983
Creator:
Carreras, B. A.; Garcia, L.; Hender, T. C.; Hicks, H. R.; Holmes, J. A.; Lynch, V. E. et al.
Object Type:
Article
System:
The UNT Digital Library
10-GeV heavy-ion collider
This paper presents a brief report on a study for a relativistic heavy-ion collider covering an energy span from 1 GeV on 1 GeV to 10 GeV on 10 GeV. This energy range was selected as most appropriate for exploitation of the baryon-rich region of relativistic nucleus-nucleus collisions. The study was done prior to the Wells College meeting of the NSAC Long-Range Plan Working Group which recommended a collider with tip energy of 30 GeV on 30 GeV. The present work has not been modified to reflect this higher top energy but some remarks will be made at the end about changes needed to reach these energies. The basic elements of the facility would remain much the same.
Date:
January 1, 1983
Creator:
Young, G. R.; Martin, J. A. & Ball, J. B.
Object Type:
Article
System:
The UNT Digital Library
30-MJ SMES system operating experience: November 1982-June 1983
This paper describes performance measurements on the dewar, coil, and cryogenic system for the 30-MJ superconducting magnetic energy storage (SMES) unit that has recently been tested at a Bonneville Power Administration substation in Tacoma, Washington. The cryostat, the world's largest fiber-reinforced plastic, open-mouthed dewar, boils off 12 l/h in accordance with previous calculations. Cyclic losses in the coil, 54 W for +-8.4-MW modulation at 1 Hz, are approximately 50% greater than calculated. Refrigerator capacity is adequate to handle the heat produced by the average modulation demand on the coil.
Date:
January 1, 1983
Creator:
Schermer, R.I.
Object Type:
Article
System:
The UNT Digital Library
30-MJ Superconducting Magnetic-Energy-Storage Stabilizing System: An Overview
The 30-MJ superconducting magnetic-energy-storage (SMES) system was devised as an alternate means to modulate the Bonneville Power Administration (BPA) Pacific AC Intertie, a part of the Western US Power System, to prevent undamped power oscillations at 0.35 Hz that were observed to be associated with high power transmission. The SMES system was installed at the BPA Tacoma Substation and successfully operated as an experimental device to initiate tests to determine power system dynamics, to investigate their variability, to assess system response to SMES modulation with a major variable load, and to use SMES to develop stability-control techniques. The system has been operated at frequencies of 0.1 to 1.0 Hz at power levels of +- 8.3 MW with a parallel modulation of the converter bridges and up to 9.5 MW reactive power together with +- 4.5 MW real power in constant VAR mode with buck-boost modulation of the bridges. The coil has been charged at a maximum rate of 11.8 MW. Operation of the SMES system is now under BPA jurisdiction, and all hardware has been transferred to BPA.
Date:
January 1, 1983
Creator:
Roger, J. D.; Boenig, H. J.; Dean, J. W.; Schermer, R. I.; Annestrand, S. A.; Hauer, J. F. et al.
Object Type:
Article
System:
The UNT Digital Library
85,000-GPM, single-stage, single-suction LMFBR intermediate centrifugal pump
The mechanical and hydraulic design features of the 85,000-gpm, single-stage, single-suction pump test article, which is designed to circulate liquid-sodium coolant in the intermediate heat-transport system of a Large-Scale Liquid Metal Fast Breeder Reactor (LS-LMFBR), are described. The design and analytical considerations used to satisfy the pump performance and operability requirements are presented. The validation of pump hydraulic performance using a hydraulic scale-model pump is discussed, as is the featute test for the mechanical-shaft seal system.
Date:
January 1, 1983
Creator:
Fair, C.E.; Cook, M.E. Huber, K.A. & Rohde, R.
Object Type:
Article
System:
The UNT Digital Library
150-kW, 450-MHz gyrocon rf generator
The output-power and conversion efficiency of the Los Alamos gyrocon were increased by a factor of 150 in the past year. Major improvements in the phase- and amplitude-control system and in understanding the electron multipactor and surface-conditioning processes increased the output power. The highest measured efficiency on this gyrocon is 23%, which was obtained with several combinations of parameters. Both the output power and the efficiency are a factor of 3 below the design values, and several possibilities are being examined to remove the discrepancy between theory and experiment.
Date:
January 1, 1983
Creator:
Tallerico, P.J.
Object Type:
Article
System:
The UNT Digital Library
185-MeV injector design for the ANL 4-GeV microtron project
The injector starts with a 5 MeV preinjector followed by an 18 MeV S-band linac. The 23 MeV electrons are transported and injected into a Racetrack Microtron via a 10/sup 0/ achromatic bend system. Twenty-seven turns are used to boost the energy to 185 MeV. Reverse-field stripes on the 180/sup 0/ end magnets and quadrupole focussing on the return paths maintain a matched-dispersion free beam with transverse ..beta..= 5.0 m in the center of the 4.6 m long linac. The beam is recirculated outside of the RTM linac to shear the longitudinal phase-space ellipse before extraction. The extracted beam is transported and injected into the six-sided microtron at 185 MeV.
Date:
January 1, 1983
Creator:
Colton, E.
Object Type:
Article
System:
The UNT Digital Library
240-kA switch with potential application in electromagnetic-launch systems
Electromagnetic (EM) launchers have severe switching requirements. Switching demands for railgun systems, for instance, inlcude current conduction from hundreds of kA to a few MA, conduction times of a ms to a few s, standoff voltages as high as a few tens of kV, to rcovery voltages of 1 to 10 kV after conduction, opening and closing duty, and repetitive operation up to about 50 Hz. These demands, particularly for repetitive opening duty, are far beyond the capability of most current switches and switching concepts. This paper will review the performance of rod array triggered vacuum gap (RATVG) switches and discuss their potential for solving switching problems in EM launcher systems. A new mode of operation for the RATVG switch is proposed. Fundamental considerations for the operation of opening switches and their associated transfer circuits are presented. Methods of recovering the railgun's inductive energy to enable efficient repetitive operation are discussed and new circuits with such capability are proposed.
Date:
January 1, 1983
Creator:
Honig, E. M.
Object Type:
Article
System:
The UNT Digital Library
15th Street News (Midwest City, Okla.), Vol. 12, No. B, Ed. 1 Wednesday, January 12, 1983
Newspaper from Oscar Rose Junior College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
January 12, 1983
Creator:
Kuhlman, Judy
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 12, No. 15, Ed. 1 Thursday, January 20, 1983
Newspaper from Oscar Rose Junior College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
January 20, 1983
Creator:
Kuhlman, Judy
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
15th Street News (Midwest City, Okla.), Vol. 12, No. 15, Ed. 1 Thursday, January 27, 1983
Newspaper from Oscar Rose Junior College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
January 27, 1983
Creator:
Kuhlman, Judy
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
1982 annual report: Biomass Thermochemical Conversion Program
This report provides a brief overview of the Thermochemical Conversion Program's activities and major accomplishments during fiscal year 1982. The objective of the Biomass Thermochemical Conversion Program is to generate scientific data and fundamental biomass converison process information that, in the long term, could lead to establishment of cost effective processes for conversion of biomass resources into clean fuels and petrochemical substitutes. The goal of the program is to improve the data base for biomass conversion by investigating the fundamental aspects of conversion technologies and exploring those parameters which are critical to these conversion processes. To achieve this objective and goal, the Thermochemical Conversion Program is sponsoring high-risk, long-term research with high payoff potential which industry is not currently sponsoring, nor is likely to support. Thermochemical conversion processes employ elevated temperatures to convert biomass materials into energy. Process examples include: combustion to produce heat, steam, electricity, direct mechanical power; gasification to produce fuel gas or synthesis gases for the production of methanol and hydrocarbon fuels; direct liquefaction to produce heavy oils or distillates; and pyrolysis to produce a mixture of oils, fuel gases, and char. A bibliography of publications for 1982 is included.
Date:
January 1, 1983
Creator:
Schiefelbein, G. F.; Stevens, D. J. & Gerber, M. A.
Object Type:
Report
System:
The UNT Digital Library
1983 annual report on Alaska's mineral resources. Geological Survey Circular 908
This report describes activity during 1982 in Alaska relating to oil and gas, uranium, coal and peat, geothermal resources, and non-fuel, critical and strategic minerals. (ACR)
Date:
January 1, 1983
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
[2012.201.B0960B.0129]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "For Gator, an Oklahoma City police dog, a full set of teeth is an occupational necessity." Image is of the head of a dog with a person's hands holding the mouth of the dog open to show his teeth. There is a tongue protector in the dog's mouth and a metal cap on one of the canine incisors.
Date:
January 25, 1983
Creator:
Hoke, Doug
Object Type:
Photograph
System:
The Gateway to Oklahoma History
24th Annual Report
The ACIR Library is composed of publications that study the interactions between different levels of government. This document is an annual report.
Date:
January 1983
Creator:
United States. Advisory Commission on Intergovernmental Relations.
Object Type:
Book
System:
The UNT Digital Library
2D accelerator design for SITEX negative ion source
Solving the Poisson-Vlasov equations where the magnetic field, B, is assumed constant, we optimize the optical system of a SITEX negative ion source in infinite slot geometry. Algorithms designed to solve the above equations were modified to include the curved emitter boundary data appropriate to a negative ion source. Other configurations relevant to negative ion sources are examined.
Date:
January 1, 1983
Creator:
Whealton, J. H.; Raridon, R. J.; McGaffey, R. W.; McCollough, D. H.; Stirling, W. L. & Dagenhart, W. K.
Object Type:
Article
System:
The UNT Digital Library
5f state interaction with inner coordination sphere ligands: einsteinium 3+ ion fluorescence in aqueous and organic phases
The interaction between 5f electron states of einsteinium 3+ ion and coordinated ligands in solution has been probed using laser-induced fluorescence. Aquo einsteinium 3+ ion was observed to fluoresce from its first excited J = 5 state in a broad-band peaking at 9260 wavenumbers. The observed fluorescence lifetimes were 1.05 microseconds and 2.78 microseconds in H/sub 2/O and D/sub 2/O (99+ % D atom), respectively. The non-radiative decay rates derived from the lifetime data are compared with previously reported data for Cm, Sm, Eu, Tb, and Dy aquo 3+ ions. The 5f actinide states exhibit substantially greater non-radiative decay rates than do lanthanide 4f states of similar energy gap. This provides evidence that actinide 5f electrons interact more strongly with their inner coordination sphere than do lanthanide ion 4f electrons. The fluorescence lifetime of einsteinium 3+ ion complexed with 1 formal di(2-ethylhexyl)orthophosphoric acid in h-heptane was 2.34 microseconds. 3 figures, 1 table.
Date:
January 1, 1983
Creator:
Beitz, James V.; Wester, Dennis W. & Williams, Clayton W.
Object Type:
Report
System:
The UNT Digital Library
[Abilene City Council Minutes: 1983]
Ledger containing minutes of the City Council in Abilene, Texas documenting the group's discussions and activities from January to July 1983.
Date:
1983-01/1983-07
Creator:
Abilene (Tex.)
Object Type:
Book
System:
The Portal to Texas History
Abilene Philharmonic Playbill: January 25-March 1, 1983
Program for an Abilene Philharmonic concert that ran from January 25th to March 1st (Series A third and fourth concerts) during the 33rd season. It includes information about the pieces performed, artists and musicians, and advertising from local companies.
Date:
January 1983
Creator:
Abilene Philharmonic
Object Type:
Pamphlet
System:
The Portal to Texas History
[Abstract art by Claudia Betti]
Photograph of a drawing by Claudia Webb Betti, with the words "the more it changes, the more it's the same thing" written on the bottom. Mixed media.
Date:
January 1983
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[Abstract art in mixed media by Claudia Betti]
Photograph of a mixed media drawing by Claudia Webb Betti. Written at the bottom is the phrase, "every this goes with every that."
Date:
January 1983
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[Abstract art in mixed medium by Claudia Betti]
Photograph of a mixed media drawing by Claudia Webb Betti. Written at the bottom is the phrase, "every this goes with every that."
Date:
January 1983
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
[Abstract art piece by Claudia Betti]
Photograph of an abstract art piece by Claudia Webb Betti.
Date:
January 1983
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library