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in subjects: "Performance"

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Operating experience and cesium recycling on the LASL polarized triton source

The polarized triton source has had over 3000 hours of operation. Experience gained with Lamb-shift operation that are not unique to tritium handling are discussed. (GHT)

Date: January 1, 1980

Creator: Hardekopf, R.A.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

INEX simulations of the optical performance of the AFEL

The AFEL (Advanced Free-Electron Laser) Project at Los Alamos National Laboratory is presently under construction. The project's goal is to produce a very high-brightness electron beam which will be generated by a photocathode injector and a 20 MeV rf-linac. Initial laser experiments will be performed with a 1-cm-period permanent magnet wiggler which will generate intense optical radiation near a wavelength of 3.7 {mu}m. Future experiments will operate with slotted-tube'' electromagnetic wiggle… more

Date: January 1, 1991

Creator: Goldstein, J.C.; Wang, T.S.F. & Sheffield, R.L.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Picotron 100 streak tubes as a 150-channel photometer

The characterization of a streak camera based upon Picotron 100 tube types is given. Both a large (30 cm 1 x 10 cm dia.) and a small (18 cm 1 x 5 cm dia.) version of this design has been tested. Over 150 channels of information are simultaneously time resolved with system S.N.R. of 3 at 100 picosecond time resolution without post intensification. Absolute photometric evaluation is given in the dynamic mode, i.e. while operating in the picosecond time domain. Such quantitative data has been lack… more

Date: January 1, 1982

Creator: Majumdar, S.; Weiss, P.B. & Black, J.P.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Design and performance of liquid hydrogen target systems for the Fermilab Fixed Target Program

The Fermilab 1990--1991 Fixed Target Program featured six experiments utilizing liquid hydrogen or liquid deuterium targets as part of their apparatus. Each design was optimized to the criteria of the experiment, resulting in variations of material selection, methods of refrigeration and secondary containment. Collectively, the targets were run for a total of 14,184 hours with an average operational efficiency of 97.6%. The safe and reliable operation of these targets was complemented by an inc… more

Date: July 1, 1991

Creator: Allspah, D.; Danes, J.; Peifer, J. & Stanek, R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

ETRANS: an energy transport system optimization code for distributed networks of solar collectors

The optimization code ETRANS was developed at the Pacific Northwest Laboratory to design and estimate the costs associated with energy transport systems for distributed fields of solar collectors. The code uses frequently cited layouts for dish and trough collectors and optimizes them on a section-by-section basis. The optimal section design is that combination of pipe diameter and insulation thickness that yields the minimum annualized system-resultant cost. Among the quantities included in th… more

Date: September 1, 1980

Creator: Barnhart, J.S.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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WELDING AND BRAZING OF HIGH-TEMPERATURE RADIATORS AND HEAT EXCHANGERS

Procedures were developed for fabricating highperformance radiators and heat exchangers for the Aircraft Nuclear Propulsion (ANP) Program. These components, which contain multitudes of tube-to-tube sheet and tube-to-fin joints, are similar in design to those under consideration for a variety of space vehicle applications. In order to ensure reliability of the tube-to-tube sheet joints, techniques producing welds of extremely high quality were used and back brazing of the welds with a suitable a… more

Date: February 20, 1962

Creator: Slaughter, G.M. & Patriarca, P.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Microcrystalline silicon growth for heterojunction solar cells. Second quarterly report, 1 April 1983-30 June 1983

In this reporting period, a single source of evaporation with B mixed with highly doped Si was used instead of the co-evaporation of separate Si and B sources. The purpose was to reduce possible carbon contamination. The results of both the heterojunction or heteroface structures, however, were similar to last quarter when evaporation was used. The best Voc of the heterojunction was about 460mV and no improvement in Voc in the heteroface structure, was observed; slight Voc degradation occurred.… more

Date: January 1, 1983

Creator: Iles, P. A.; Leung, D. C. & Fang, P. H.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Strontium-90 Fueled Thermoelectric Generator Power Source for Five-Watt U.S. Coast Guard Light Buoy. Final Report

The objectives of the SNAP 7A program were to design, manufacture, test, and deliver a five-watt electric generation system for a U. S. Coast Guard 8 x 26E light buoy. The 10-watt Sr/sup 90/ thermoelectric generator, the d-c-to-d-c converter, batteries and the method of installation in the light buoy are describcd. The SNAP 7A generator was fueled with four capsules containing a total of 40,800 curies of Sr/sup 90/ titanate. After fueling and testing, the SNAP 7A electric generating system was … more

Date: February 1, 1962

Item Type: Report

Partner: UNT Libraries Government Documents Department

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GAS-COOLED REACTOR PROGRAM QUARTERLY PROGRESS REPORT FOR PERIOD ENDING SEPTEMBER 30, 1961

Progress is reported on investigations in support of the Experimental Gas-Cooled Reactor, the Pebble-Bed Reactor Experiment, Advanced reactor design and development, test facilities, components, and materials. Topics covered include EGCR physics, EGCR performance analyses, structural investigations, EGCR component and materials development and testing, EGCR experimental facilities, PBRE physics and design studies, fueled-graphite investigations, clad fuel development, design studies of advanced… more

Date: February 1, 1962

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Diskless LSI-11 systems

Programs for dedicated LSI-11 based systems can easily be stored in ROM instead of floppy disks, yet execute the same as disk-stored programs. Two sample systems are described.

Date: January 1, 1982

Creator: Ford, W. & Shirk, D. G.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Importance of the specific heat anomaly in the design of binary Rankine cycle power plants

The transposed critical temperature (TPCT) is shown to be an extremely important thermodynamic property in the selection of working fluids and turbine states for geothermal power plants operating on a closed organic (binary) Rankine cycle. When the optimum working fluid composition and process states are determined for specified source and sink conditions, turbine inlet states consistently lie adjacent to the working fluids' TPCT line for all resource temperatures, constraints, and cost and eff… more

Date: May 1, 1980

Creator: Pope, W.L.; Doyle, P.A.; Fulton, R.L. & Silvester, L.F.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Fuel performance annual report for 1989

This annual report, the twelfth in a series, provides a brief description of fuel performance during 1989 in commercial nuclear power plants and an indication of trends. Brief summaries of fuel design changes, fuel surveillance programs, fuel operating experience, fuel problems, high-burnup fuel experience, and items of general significance are provided. References to more detailed information and related US Nuclear Regulatory Commission evaluations are included.

Date: June 1, 1992

Creator: Bailey, W.J.; Berting, F.M. (Pacific Northwest Lab., Richland, WA (United States)) & Wu, S. (Nuclear Regulatory Commission, Washington, DC (United States). Div. of Systems Technology)

Item Type: Report

Partner: UNT Libraries Government Documents Department

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First wall/blanket/shield design and optimization system

First wall/blanket/shield design and optimization system (BSDOS) has been developed to provide a state-of-the-art design tool for fast accurate analysis. In addition, it has been designed to perform several other functions: (1) allowing comparison and evaluation studies for different concepts using the same data bases and ground rules, (2) permitting the use of any figure of merit in the evaluation studies, (3) optimizing the first wall/blanket/shield design parameters for any figure of merit u… more

Date: February 1, 1988

Creator: Gohar, Y.; Baker, C.; Attaya, H.; Cha, Y.; Majumdar, S. & Scandora, T.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Near Term Hybrid Passenger Vehicle Development Program. Phase I, Final report. Appendix A: mission analysis and performance specification studies. Volume I

Studies are described which were performed for the Near Term Hybrid Vehicle program to determine passenger car usage patterns and to correlate these trip mission characteristics with vehicle design and performance specifications. (LCL)

Date: April 20, 1979

Creator: Traversi, M. & Barbarek, L.A.C.

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Inductively coupled plasma-atomic emission spectroscopy: a computer controlled, scanning monochromator system for the rapid determination of the elements

A computer controlled, scanning monochromator system specifically designed for the rapid, sequential determination of the elements is described. The monochromator is combined with an inductively coupled plasma excitation source so that elements at major, minor, trace, and ultratrace levels may be determined, in sequence, without changing experimental parameters other than the spectral line observed. A number of distinctive features not found in previously described versions are incorporated int… more

Date: March 1, 1980

Creator: Floyd, M. A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Advanced /sup 90/Sr space power supply. 250 watt dynamic system

No Description Available.

Date: September 6, 1973

Item Type: Report

Partner: UNT Libraries Government Documents Department

open access

Fueling of tandem mirror reactors

This paper summarizes the fueling requirements for experimental and demonstration tandem mirror reactors (TMRs), reviews the status of conventional pellet injectors, and identifies some candidate accelerators that may be needed for fueling tandem mirror reactors. Characteristics and limitations of three types of accelerators are described; neutral beam injectors, electromagnetic rail guns, and laser beam drivers. Based on these characteristics and limitations, a computer module was developed fo… more

Date: January 1, 1985

Creator: Gorker, G. E. & Logan, B. G.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

First order study for an iron core OH system for TNS

A simple comparison has been made between an air core and an iron core ohmic heating system for a particular device, and it was shown that the peak power requirements can be substantially reduced by the use of an iron core to power levels handled by industry today. It was also shown that for an ohmic heating system initiated plasma that the cost of the iron core ohmic heating power system (iron core, dual rectifier, and DC switch) is less than the cost for a subset of the power system for an ai… more

Date: January 1, 1977

Creator: Ballou, J. K. & Schultz, J.

Item Type: Article

Partner: UNT Libraries Government Documents Department

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Development of a low intensity current monitor system

This report documents the development of a current transformer system used to measure pulsed ion beam currents with a wide dynamic intensity range (nA to mA, and factor of 10{sup 6}). Peak beam currents at the LAMPF accelerator typically range from 100 to nA to 40 mA with pulse widths varying from 30 to 1000 {mu}s. Signal conditioning of the peak current output provides an average current readout with a range of 1 nA to 2 mA, noise of approximately {plus minus}0.5 nA, and accuracy of {plus minu… more

Date: January 1, 1991

Creator: Gallegos, F.R.

Item Type: Article

Partner: UNT Libraries Government Documents Department

open access

Solar hot water demonstration project at Red Star Industrial Laundry, Fresno, California

The Final Report of the Solar Hot Water System located at the Red Star Industrial Laundry, 3333 Sabre Avenue, Fresno, California, is presented. The system was designed as an integrated wastewater heat recovery and solar preheating system to supply a part of the hot water requirements. It was estimated that the natural gas demand for hot water heating could be reduced by 56 percent (44 percent heat reclamation and 12 percent solar). The system consists of a 16,500 gallon tube-and-shell wastewate… more

Date: July 1, 1980

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Computer simulation of steady-state performance of air-to-air heat pumps

A computer model by which the performance of air-to-air heat pumps can be simulated is described. The intended use of the model is to evaluate analytically the improvements in performance that can be effected by various component improvements. The model is based on a trio of independent simulation programs originated at the Massachusetts Institute of Technology Heat Transfer Laboratory. The three programs have been combined so that user intervention and decision making between major steps of th… more

Date: March 1, 1978

Creator: Ellison, R D & Creswick, F A

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Impact of Nonequilibrium Particle Temperature Considerations on Seeded Coal Combustion Plasma Properties

This past quarter ending 12/30/91, the linear MHD channel simulation model has not only been completely specified but also fully modified to incorporate considerations for nonequilibrium particle temperatures. Testing of the modified model with the initial values from the first submodel (Richter's combustion zone model) and evaluation of the non-equilibrium particle temperature effect on the overall MHD performance is being held up. Reasons for the holdup is the lack of adequate response from D… more

Date: January 1, 1991

Creator: Oni, A. A.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Cadmium sulfide/copper sulfide heterojunction cell research. Final report, February 26, 1979-July 15, 1980

Extensive modifications were made to the multi-source deposition apparatus. These include the installation of a larger vacuum chamber on the existing system. The new chamber provides improved inter-source shielding, an improved substrate mounting and heating system, and a vacuum interlock for introducing substrates. CdS resistivity control by both In doping and off-stoichiometric deposition has been investigated. Indium doping has been achieved both by diffusion from a pre-deposited In layer an… more

Date: June 30, 1980

Creator: Thornton, J. A. & Cornog, D. G.

Item Type: Report

Partner: UNT Libraries Government Documents Department

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Photovoltaic engineering services pertinent to solar energy conversion

The application of the compound parabolic concentrator (CPC) for use with solar cells has been investigated. Experiments with state-of-the-art Si cells in a CPC and under solar concentration were performed. A theoretical model for calculating the behavior of Si solar cells with concentration was developed. Detailed calculations of the energy distribution in the CPC were made. Finally a cost effectiveness analysis shows that the CPC system will produce power at very much lower cost than will fla… more

Date: June 1, 1975

Creator: Bell, R O; Ho, J C.T.; Kurth, W & Surek, T

Item Type: Report

Partner: UNT Libraries Government Documents Department