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Performance characteristics of large aperture, ten-cell, atmospheric pressure isobutane Cherenkov counters

Description: Two large aperture, 10 cell atmospheric-pressure isobutane Cherenkov counters were designed and constructed for a SLAC streamer chamber experiment. The rejection efficiencies for a 9 GeV/c ..pi../sup -/ were measured to be 99.838 +- .006% and 99.717 +- 008% for the two counters. The design details and performance characteristics are discussed.
Date: May 24, 1980
Creator: Hylen, J.; Ma, Z.M.; Jawahery, A.; Maruyama, T.; Milburn, R. & Thornton, R.
Partner: UNT Libraries Government Documents Department
open access

Geothermal Loan Guarantee Program: need for improvements

Description: The progress and management of the Department of Energy's geothermal loan guarantee program are discussed. Recommendations for improving the program and matters for consideration by the Congress are included. (MHR)
Date: January 24, 1980
Creator: Staats, E. B.
Partner: UNT Libraries Government Documents Department
open access

Rad Chem Data Acquisition Chassis Users Manual

Description: The Shiva Laser at LLL requires many forms of diagnostics to measure and analyze fusion experiments. This manual describes the operation of a Micro-Processor controlled data acquisition system designed at LLL to measure Neutron Activation during fusion experiments on the Shiva Laser.
Date: January 24, 1980
Creator: Jones, B. A.
Partner: UNT Libraries Government Documents Department
open access

Computational compact torus experiment

Description: We describe a typical 2D magnetohydrodynamic (MHD) calculation of rundown of plasma in a coaxial, magnetized gun and injection of the plasma and reconnection of the embedded magnetic fields to form a compact toroidal plasma.
Date: December 24, 1980
Creator: Eddleman, J.L.; McNamara, B.; Nash, J.K.; Shearer, J.W. & Turner, W.C.
Partner: UNT Libraries Government Documents Department
open access

Corrosion evaluation of cooling-water treatments for gas centrifuge facilities

Description: The corrosion resistance of six different types of weighted metal coupons was evaluated at 29/sup 0/C (84/sup 0/F) in flowing water containing nitrite-borate-silicate corrosion inhibitors. The question for evaluation was whether it would be more advantageous: (1) to drain the treated cooling water from the centrifuge machine and to expose them to moisture-laden air over an assumed shop downtime and repair perid of 1 month; or (2) to let the treated cooling water remain stagnant in the machines … more
Date: November 24, 1980
Creator: Schmidt, C. R. & Meredith, P. F.
Partner: UNT Libraries Government Documents Department
open access

Acid rain: the impact of local sources

Description: It has been assumed that acid rain is predominantly a problem of long-range transport of pollutants from large fossil fuel combustion sources, namely coal-fired utilities. However, close examination of fuel use information and source emission characteristics in the Adirondacks, Florida, and California suggests that local oil burning and automotive sources may be major contributors to the occurrence of acid rain in these areas. This report describes the possible role of local combustion sources … more
Date: November 24, 1980
Creator: Spaite, P.; Esposito, M.P.; Szabo, M.F. & Devitt, T.W.
Partner: UNT Libraries Government Documents Department
open access

Shift conversion and methanation in coal gasification: bench-scale evaluation of a sulfur-resistant catalyst. Final report. [Iridium-promoted nickel catalysts supported or aluminium oxide]

Description: The results of this study demonstrate that the Ir-promoted Ni/Al/sub 2/O/sub 3/ catalyst possesses several valuable and superior characteristics when used for catalytic methanation under typical industrial conditions. These properties include: higher activity by a factor of > 2 than that of the unpromoted Ni/Al/sub 2/O/sub 3/ catalyst; enhanced resistance to deactivation by hydrogen sulfide during exposure to contaminated feedstock, as manifested by the prolonged high methanation activity and e… more
Date: October 24, 1980
Creator: Wood, B. J.; McCarty, J. G.; Sheridan, D.; Ablow, C. M. & Wise, H.
Partner: UNT Libraries Government Documents Department
open access

AFR spent fuel storage program. Technical progress report, July 1980-September 1980

Description: Work on this project is focused on developing design and licensing information for the model facility. The subcontracts for soils and structural design and the security system design have been completed. The rack design subcontract is progressng satisfactorily. Design of facility modifications have been completed and draft reports are underway. Licensing documentation is approximately 65% complete and progressing at a satisfactory pace to meet scheduled projections.
Date: October 24, 1980
Partner: UNT Libraries Government Documents Department
open access

Liquid chromatographic fractionations of mixtures of polystyrene oligomers

Description: Oligomer mixtures of 800, 2200, and 4000 molecular weight polystyrene have been fractionated using silica and bonded phase columns under similar conditions of solvent gradient and flow rate. Using a hexane/tetrahydrofuran gradient, the silica and nitro phases were best in that they separated 41 and 43 oligomers, respectively. At the other extreme, a phenyl bonded phase column gave virtually no resolution using a water/THF gradient and a cyano bonded phase column, using the earlier hexane/tetrah… more
Date: May 24, 1980
Creator: Curtis, M A; Webb, J W; Warren, D C; Brandt, V O; Gerberich, F G; Raut, K B et al.
Partner: UNT Libraries Government Documents Department
open access

Evaluation of hydrogen embrittlement in Cr-Mo pressure vessel steels. Topical report No. 1

Description: Commercial 2-1/4 Cr-1 Mo low strength steel specimens have been tested to measure their susceptibility to hydrogen embrittlement in an environment of H/sub 2/S at 50 psig. It was found that two factors, viz. (i) the plane stress zones on the crack front in compact tension specimens and (ii) incubation time effects, seriously confounded measurements on these steels when tested by conventional rising load experiments. Because of the incubation time effect, K/sub or/ (the stress intensity at which… more
Date: August 24, 1980
Creator: Shaw, B. J. & Johnson, E. W.
Partner: UNT Libraries Government Documents Department
open access

Evaluation of hydrogen embrittlement in Cr-Mo pressure vessel steels. Topical report No. 1

Description: Commercial 2 1/4 Cr-1 Mo low strength steel specimens have been tested to measure their susceptibility to hydrogen embrittlement in an environment of H/sub 2/S at 50 psig. It was found that two factors, viz. (1) the plane stress zones on the crack front in compact tension specimens, and (2) incubation time effects, seriously confounded measurements on these steels when tested by conventional rising load experiments. Because of the incubation time effect, K/sub or/ (the stress intensity at which… more
Date: August 24, 1980
Creator: Shaw, B. J. & Johnson, E. W.
Partner: UNT Libraries Government Documents Department
open access

Studies on the control of cell wall extension. Progress report, September 1, 1979-August 31, 1980

Description: The growth rate of plant cells can be defined in terms of five parameters: the hydraulic conductivity of the tissue (L'p), the rate of export from the cell to the wall of a wall loosening factor (dW/dt), the capacity of the wall to be loosened in response to the wall loosening factor (WLC), the osmotic potential of the cells and outside solution (..pi../sub c/ and ..pi../sub o/, respectively), and the yield threshold for wall expansion (Y). The study assesses each of these parameters under cond… more
Date: September 24, 1980
Creator: Cleland, R. E.
Partner: UNT Libraries Government Documents Department
open access

Simple model for decay of laser generated shock waves

Description: A simple model is derived to calculate the hydrodynamic decay of laser-generated shock waves. Comparison with detailed hydrocode simulations shows good agreement between calculated time evolution of shock pressure, position, and instantaneous pressure profile. Reliability of the model decreases in regions of the target where superthermal-electron preheat effects become comparable to shock effects.
Date: October 24, 1980
Creator: Trainor, R. J.
Partner: UNT Libraries Government Documents Department
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