UNT Libraries Government Documents Department - 5,431 Matching Results

Search Results

prev Results: 25 - 48 next
open access

34th Geothermal Coordinating Group Meeting

Description: Chairman William Ogle said the overall purpose of the meeting was to consider how the US government, and the Division of Geothermal Energy in particular, might apply its geothermal effort more effectively. Given the present situation, how does Uncle Sam make the best possible effort? On this theme, there are 4 main subquestions: (1) what government support is needed? (2) how can we improve cooperation between industry, the national laboratories, universities, and industries, and does it matter?… more
Date: November 9, 1982
Item Type: Refine your search to only Article
open access

Ablative fast pyrolysis of biomass in the entrained-flow cyclonic reactor at SERI

Description: Progress with the entrained flow cyclonic reactor at SERI is detailed. Feedstocks successfully used include wood flour and fairly large sawdust. Preliminary results show that relatively complete vaporization of the biomass is realized and that the yields of tar or gas can be varied over quite a range with trends following first order kinetic concepts.
Date: June 1, 1982
Creator: Diebold, J. & Scahill, J.
Item Type: Refine your search to only Article
open access

Absolutely calibrated soft-x-ray streak camera for laser-fusion applications

Description: The intensity output of a soft-x-ray streak camera was calibrated (SXRSC) in order to make absolute flux measurements of x rays emitted from laser-produced plasmas. The SXRSC developed at LLNL is used to time-resolve x-ray pulses to better than 20 ps. The SXRSC uses a Au photocathode on a thin carbon substrate which is sensitive to x rays from 100 eV to greater than 10 keV. Calibrations are done in the dynamic mode using a small laser-produced x-ray source. The SXRSC is calibrated by comparing … more
Date: January 1, 1982
Creator: Kauffman, R.L.; Medecki, H. & Stradling, G.
Item Type: Refine your search to only Article
open access

Absorption of ion Bernstein waves by impurity cyclotron harmonics

Description: This paper analyzes the damping of externally-launched ion Bernstein waves by absorption at the cyclotron harmonics of the impurity ions. The inclusion of the non-magnetic energy flux term reduces the damping rate by nearly two orders of magnitude from the previous calculation. Excessive impurity damping can be avoided by launching ion Bernstein waves at a frequency just below the second (or higher) cyclotron harmonic of hydrogen.
Date: May 1, 1982
Creator: Ono, M.
Item Type: Refine your search to only Report
open access

Abstracts of the symposium on unsaturated flow and transport modeling

Description: Abstract titles are: Recent developments in modeling variably saturated flow and transport; Unsaturated flow modeling as applied to field problems; Coupled heat and moisture transport in unsaturated soils; Influence of climatic parameters on movement of radionuclides in a multilayered saturated-unsaturated media; Modeling water and solute transport in soil containing roots; Simulation of consolidation in partially saturated soil materials; modeling of water and solute transport in unsaturated h… more
Date: March 1, 1982
Item Type: Refine your search to only Article
open access

Accelerated Aging of GaAs Concentrator Solar Cells

Description: An accelerated aging study of AlGaAs/GaAs solar cells has been completed. The purpose of the study was to identify the possible degradation mechanisms of AlGaAs/GaAs solar cells in terrestrial applications. Thermal storage tests and accelerated AlGaAs corrosion studies were performed to provide an experimental basis for a statistical analysis of the estimated lifetime. Results of this study suggest that a properly designed and fabricated AlGaAs/GaAs solar cell can be mechanically rugged and env… more
Date: April 1, 1982
Creator: Gregory, P. E.
Item Type: Refine your search to only Report
open access

Acceleration of heavy ions to very high energies

Description: The current interest of physicists in the collisions of heavy ions closes an interesting circle in the technology of accelerator building. The first cyclic accelerator, built by R. Wideroe, was a linear accelerator designed to accelerate potassium ions. Subsequent to Wideroe's achievement, much of the art of accelerator construction has been devoted to creating energetic beams of electrons and protons. Now we find ourselves returning to the heavy ions, and Wideroe's linear accelerator structure… more
Date: January 1, 1982
Creator: Barton, M. Q.
Item Type: Refine your search to only Article
open access

Acceleration of hydrogen ions and conic formation along auroral field lines

Description: Electrostatic ion cyclotron turbulence and the formation of ion conics at low altitudes (approx. = 1500 km) along auroral field lines have been investigated analytically and by plasma numerical simulations. Ion cyclotron waves are assumed to be driven unstable by the up-going cold ionospheric electrons associated with the downward auroral current. When the electron drift speed is comparable to the electron thermal speed, it is found that the large amplitude, e phi/T/sub e/ approx. = 1, coherent… more
Date: May 1, 1982
Creator: Okuda, H. & Ashour-Abdalla, M.
Item Type: Refine your search to only Report
open access

Acceleration of magnetized plasma rings

Description: One scheme is considered, acceleration of a ring between coaxial electrodes by a B/sub theta/ field as in a coaxial rail-gun. If the electrodes are conical, a ring accelerated towards the apex of the cone undergoes self-similar compression (focussing) during acceleration. Because the allowable acceleration force F/sub a/ = kappa U/sub m//R (kappa < 1) increases as R/sup -2/, the accelerating distance for conical electrodes is considerably shortened over that required for coaxial electrodes. In … more
Date: November 16, 1982
Creator: Hartman, D.; Eddleman, J. & Hammer, J. H.
Item Type: Refine your search to only Article
open access

Accelerator and fusion research division

Description: Transverse and longitudinal phase volumes are evaluated and dilution factors defined. A new and simpler expression for the effect of third-order geometric aberrations is given. Constraints on the final quadrupole bore radius are discussed. Parameters of the example design are given and the preceding analysis is applied to it. The available dilution factor allows a comparison between the present induction linac example design and the rf linac designs available in 1978. The last sections contain … more
Date: January 1, 1982
Creator: Judd, D.L.
Item Type: Refine your search to only Report
open access

Accelerator technology program. Progress report, January-June 1981

Description: This report covers the activities of Los Alamos National Laboratory's Accelerator Technology Division during the first 6 months of calendar 1981. We discuss the Division's major projects, which reflect a variety of applications and sponsors. The varied technologies concerned with the Proton Storage ring are concerned with the Proton Storage Ring are continuing and are discussed in detail. For the racetrack microtron (RTM) project, the major effort has been the design and construction of the dem… more
Date: May 1, 1982
Creator: Knapp, E.A. & Jameson, R.A. (comps.)
Item Type: Refine your search to only Report
open access

Accelerator technology program. Progress report, July-December 1980

Description: The activities of Los Alamos National Laboratory's Accelerator Technology Division are discussed. This report covers the last six months of calendar 1980 and is organized around the Division's major projects. These projects reflect a wide variety of applications and sponsors. The major technological innovations promoted by the Pion Generator for Medical Irradiation (PIGMI) program have been developed; accelerator technologies relevant to the design of a medically practical PIGMI have been ident… more
Date: January 1, 1982
Creator: Knapp, E.A. & Jameson, R.A. (comp.)
Item Type: Refine your search to only Report
open access

Accelerator technology program. Progress report, July-December 1981

Description: We report on the major projects of the Los Alamos National Laboratory's Accelerator Technology Division during the last 6 months of calendar year 1981. We have continued work on the radio-frequency quadrupole linear accelerator; we are doing studies of octupole focusing. We have completed the design study on an unusual electron-linear radiographic machine that could obtain x rays of turbine engines operating under simulated flight-maneuver conditions on a centrifuge. In September we completed t… more
Date: August 1, 1982
Creator: Knapp, E.A. & Jameson, R.A. (comps.)
Item Type: Refine your search to only Report
open access

Accident analysis and DOE criteria

Description: In analyzing the radiological consequences of major accidents at DOE facilities one finds that many facilities fall so far below the limits of DOE Order 6430 that compliance is easily demonstrated by simple analysis. For those cases where the amount of radioactive material and the dispersive energy available are enough for accident consequences to approach the limits, the models and assumptions used become critical. In some cases the models themselves are the difference between meeting the crit… more
Date: January 1, 1982
Creator: Graf, Joseph M. & Elder, John C.
Item Type: Refine your search to only Article
open access

Accident Generated Particulate Materials and Their Characteristics -- A Review of Background Information

Description: Safety assessments and environmental impact statements for nuclear fuel cycle facilities require an estimate of the amount of radioactive particulate material initially airborne (source term) during accidents. Pacific Northwest Laboratory (PNL) has surveyed the literature, gathering information on the amount and size of these particles that has been developed from limited experimental work, measurements made from operational accidents, and known aerosol behavior. Information useful for calculat… more
Date: May 1, 1982
Creator: Sutter, S. L.
Item Type: Refine your search to only Report
open access

Accommodation project for physically restricted personnel, Phase 1. Addendum: job-based criteria for nonskilled heavy laborers

Description: A study was conducted to determine possible accommodations for physically or medically restricted persons in the unskilled heavy labor group at Sandia National Laboratories. We conclude that only a very limited number of physically restricted persons might be accommodated under special conditions.
Date: August 1, 1982
Creator: Young, L. L., III & Mossman, P. B.
Item Type: Refine your search to only Report
open access

Accurate monotonicity-preserving cubic interpolation

Description: A simple and effective algorithm to construct a monotonicity-preserving cubic Hermite interpolant for data with rapid variations is presented. Constraining the derivatives of the interpolant according to geometric considerations makes the interpolant consistent with local monotonicity properties of the data. Numerical examples are given that compare the quality and accuracy of the proposed interpolation method with other standard interpolants.
Date: February 1, 1982
Creator: Hyman, J. M.
Item Type: Refine your search to only Report
open access

ACDOS3: a further improved neutron dose-rate code

Description: ACD0S3 is a computer code designed primarily to calculate the activities and dose rates produced by neutron activation in a variety of simple geometries. Neutron fluxes, in up to 50 groups and with energies up to 20 MeV, must be supplied as part of the input data. The neutron-source strength must also be supplied, or alternately, the code will compute it from neutral-beam operating parameters in the case where the source is a fusion-reactor injector. ACD0S3 differs from the previous version ACD… more
Date: July 1, 1982
Creator: Martin, C.S.
Item Type: Refine your search to only Report
open access

Acid digestion of combustible radioactive wastes

Description: The following conclusions resulted from operation of Radioactive Acid Digestion Test Unit (RADTU) for processing transuranic waste: (1) the acid digestion process can be safely and efficiently operated for radioactive waste treatment.; (2) in transuranic waste treatment, there was no detectable radionuclide carryover into the exhaust off-gas. The plutonium decontamination factor (DF) between the digester and the second off-gas tower was &gt;1.5 x 10/sup 6/ and the overall DF from the digester t… more
Date: March 1, 1982
Creator: Allen, C. R.; Lerch, R. E.; Crippen, M. D. & Cowan, R. G.
Item Type: Refine your search to only Article
open access

Acid rain: commentary on controversial issues and observations on the role of fuel burning

Description: Even though much information has been accumulated on the subject of acid precipitation, lack of knowledge in certain technical areas precludes an adequate understanding of (1) how serious the acid precipitation problem really is and (2) what effect controlling sources of acid precipitation precursors would have in reducing acidification. It is nevertheless possible to draw some broad conclusions regarding the problem and to ascertain the direction that the required further work should take. Thi… more
Date: March 1, 1982
Creator: Szabo, M. F.; Esposito, M. P. & Spaite, P. W.
Item Type: Refine your search to only Report
Back to Top of Screen