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A 1. 5--4 Kelvin detachable cold-sample transfer system: Application to inertially confined fusion with spin-polarized hydrogens fuels

Description: A compact cold-transfer apparatus for engaging and retrieving samples at liquid helium temperatures (1.5--4K), maintaining the samples at such temperatures for periods of hours, and subsequently inserting them in diverse apparatuses followed by disengagement, is described. The properties of several thermal radiation-insulating shrouds, necessary for very low sample temperatures, are presented. The immediate intended application is transportable target-shells containing highly spin-polarized deu… more
Date: January 1, 1990
Creator: Alexander, N.; Barden, J.; Fan, Q. & Honig, A.
open access

3-D Depth Migration via McClellan Transformations

Description: Three-dimensional seismic wavefields may be extrapolated in depth, one frequency at a time, by two-dimensional convolution with a circularly symmetric, frequency- and velocity-dependent filter. This depth extrapolation, performed for each frequency independently, lies at the heart of 3-D finite-difference depth migration. The computational efficiency of 3-D depth migration depends directly on the efficiency of this depth extrapolation. McClellan transformations provide an efficient method for b… more
Date: 1990~
Creator: Hale, D.
open access

A 4. pi. tracking TPC magnetic spectrometer for RHIC

Description: The primary physics objective of the 4{pi} TPC magnetic spectrometer proposal is to search for the Quark-Gluon Plasma. In previous workshops we have discussed what the possible hadronic signatures of such a state of matter would be. Succinctly, the QGP is a direct prediction of non-perturbative QCD. Therefore the question of the existence of this new state of matter bears directly on the validity of non-perturbative QCD. However, since non-perturbative QCD has never been established, it is appa… more
Date: January 1, 1990
Creator: Danby, G.; Eiseman, S. E.; Etkin, A.; Foley, K. J.; Hackenburg, R. W.; Longacre, R. S. et al.
open access

50 kA, 50 kV DC international and switching systems for the Los Alamos ZTH experiment

Description: Los Alamos National Laboratory has completed the engineering design and development for the high power electrical switching networks for the ZTH experiment. ZTH is Reversed Field Pinch (RFP) plasma experiment with a 4 MA plasma current capability. Power to the ohmic heating (OH), equilibrium field (EF), and toroidal field (TF) coils will be provided from a 1.43 GVA turbo-alternator, which has over 600 MJ of extractable energy. The DC interrupting switch will handle 2.4 GVA, 150 MJ during initia… more
Date: January 1, 1990
Creator: Reass, W. A.; Cordova, R. J. & Garcia, J. G.
open access

1990 Washington State Directory of Biomass Energy Facilities

Description: This second edition is an update of biomass energy production and use in Washington State for 1989. The purpose of this directory is to provide a listing of known biomass users within the state and some basic information about their facilities. The data can be helpful to persons or organizations considering the use of biomass fuels. The directory is divided into three sections of biomass facilities with each section containing a map of locations and a data summary table. In addition, a conversi… more
Date: January 1, 1990
Creator: Deshaye, J. A. & Kerstetter, J. D.
open access

1990 waste tank inspection program

Description: Aqueous radioactive wastes from Savannah River Site separations processes are contained in large underground carbon steel tanks. Tank conditions are evaluated by inspection using periscopes, still photography, and video systems for visual imagery. Inspections made in 1990 are the subject of this report.
Date: January 1, 1990
Creator: McNatt, F.G.
open access

2DPUF: A sequential gaussian puff model

Description: This report documents the Environmental Transport Section's (ETS) two-dimensional, sequential gaussian puff transport and dispersion model for emergency response. The sequential puff scheme is described, and the dispersion equations are presented. The advantages of this model over the ETS's PUFF/PLUME model are discussed. Options are calculating a two-dimensional wind field, interpolation procedures, and the wind field grid are described. The various grid systems for puff transport calculations… more
Date: January 1, 1990
Creator: Addis, R.P. & O'Steen, B.L.
open access

31st Annual Report

Description: The ACIR Library is composed of publications that study the interactions between different levels of government. This document is an annual report.
Date: January 1990
Creator: United States. Advisory Commission on Intergovernmental Relations.
open access

The A dependence of dilepton production

Description: The discovery in 1982, by the EMC group, that the structure function F{sub 2}(x) per nucleon is different in iron than deuterium was the first evidence that the structure of the nucleon might be altered in nuclei. Much more extensive and precise and data have been taken since the original discovery. This body of data is now quite consistent and many of the features of the original EMC effect'' remain intact. There have been a variety of theoretical explanations of the data, but none are totally… more
Date: January 1, 1990
Creator: Garvey, Gerald T.
open access

A1-U fuel foaming/recriticality considerations for production reactor core-melt accidents

Description: Severe accident studies for the Savannah River production reactors indicate that if coherent fuel melting and relocation occur in the absence of target melting, in-vessel recriticality may be achieved. In this paper, fuel-melt/target interaction potential is assessed, where fission gas-induced fuel foaming and melt attach on target material are evaluated and compared with available data. Models are developed to characterize foams for irradiated Al-based fuel. Predictions indicate transient foam… more
Date: January 1, 1990
Creator: Cronenberg, A.W. (Engineering Science and Analysis, Albuquerque, NM (USA)); Hyder, M.L. & Ellison, P.G. (Westinghouse Savannah River Co., Aiken, SC (USA))
open access

ABRAC: A microcomputer-based Fortran code for multi-cyle burnup

Description: Pressurized-water reactors have reactor physics and fuel management characteristics which are very amenable to simplified analysis. Given models which account for the dominant features of core and fuel performance, it is possible to rapidly perform relatively accurate scoping studies of many years of reactor operation in just a few hours on a modern (386-class) microcomputer. Models are described for burnup-dependent cross-section generation, for burnup of fuel under irradiation, and for comput… more
Date: January 1, 1990
Creator: Olson, A. P.
open access

Acceleration of Convergence

Description: Acceleration of the convergence of approximate operator iteration schemes is discussed. Algorithms based on both residual minimization and use of conjugate vector spaces are presented. It is shown that both give dramatic improvement, at very low computational cost, in the iterative solution of radiative transfer problems in the presence of scattering. 13 refs., 7 figs.
Date: January 1, 1990
Creator: Auer, Lawrence
open access

Accelerator-based intense neutron source for materials R D

Description: Accelerator-based neutron sources for R D of materials in nuclear energy systems, including fusion reactors, can provide sufficient neutron flux, flux-volume, fluence and other attractive features for many aspects of materials research. The neutron spectrum produced from the D-Li reaction has been judged useful for many basic materials research problems, and to be a satisfactory approximation to that of the fusion process. The technology of high-intensity linear accelerators can readily be appl… more
Date: January 1, 1990
Creator: Jameson, Robert A.
open access

Accelerator deflection-mode dampening experiments at Argonne

Description: As the dimensions of accelerating structures become smaller and beam intensities higher, the non-axisymmetric wake fields driven by the beam become quite large even with slight misalignments of the beam from the geometrical axis. These deflection modes then cause bunch-to-bunch beam breakup and intra-bunch head-tail instabilities. An rf show-wave structure that has very low Q for the deflection modes while maintaining a high Q for the accelerating modes would then be desirable since the unwante… more
Date: January 1, 1990
Creator: Chojnacki, E.; Gai, W.; Ho, C.; Konecny, R.; Mtingwa, S.; Norem, J. et al.
open access

Accelerator-driven neutron sources for materials research

Description: Particle accelerators are important tools for materials research and production. Advances in high-intensity linear accelerator technology make it possible to consider enhanced neutron sources for fusion material studies or as a source of spallation neutrons. Energy variability, uniformity of target dose distribution, target bombardment from multiple directions, time-scheduled dose patterns, and other features can be provided, opening new experimental opportunities. New designs have also been us… more
Date: January 1, 1990
Creator: Jameson, Robert A.
open access

Accelerator projects in the USA

Description: A review was presented of operating, planned and high energy accelerators under construction in the US. It was pointed out that the program is broad based, addressing a variety of frontiers and encompassing many of most fruitful projectiles, intensities, and energy ranges. The US program is also geographically diversified across the country in major research centers. The physics productivity over the past years has been excellent with a emphasis on the importance of sustaining the base program … more
Date: January 1, 1990
Creator: Samios, N. P.
open access

Accident sequence analysis for a BWR (Boiling Water Reactor) during low power and shutdown operations

Description: Most previous Probabilistic Risk Assessments have excluded consideration of accidents initiated in low power and shutdown modes of operation. A study of the risk associated with operation in low power and shutdown is being performed at Sandia National Laboratories for a US Boiling Water Reactor (BWR). This paper describes the proposed methodology for the analysis of the risk associated with the operation of a BWR during low power and shutdown modes and presents preliminary information resulting… more
Date: January 1, 1990
Creator: Whitehead, D.W. & Hake, T.M.
open access

Accurate calculations of neutron kerma (Kinetic Energy Released in MAterials) and damage from ENDF/B-VI evaluations for silicon, chromium, iron and nickel, and comparison with ENDF/B-V results

Description: Accurate calculations of kerma (Kinetic Energy Released in MAterials) factors and displacement cross sections are fundamental to studies of neutron heating and neutron radiation damage. Damage and heating studies are important elements in both fission and fusion reactor design. For fusion reactor studies, heating in the blanket helps determine the efficiency, and heating studies in the superconducting magnet regions determine properties of the blanket and shield, thereby affecting the economics… more
Date: January 1, 1990
Creator: Larson, D. C.; Hetrick, D. M.; Fu, C. Y.; Epperson, S. J. & MacFarlane, R. E.
open access

An Accurate Product SVD (Singular Value Decomposition) Algorithm

Description: In this paper, we propose a new algorithm for computing a singular value decomposition of a product of three matrices. We show that our algorithm is numerically desirable in that all relevant residual elements will be numerically small. 12 refs., 1 tab.
Date: January 1, 1990
Creator: Bojanczyk, A. W.; Luk, F. T.; Ewerbring, M. (Argonne National Lab., IL (USA)) & Van Dooren, P.
open access

Accurate representations of general textures by a set of weighted grains

Description: The most compact way of describing general texture information is by way of a file of weighted discrete grains. When the textures are strong, this results in a great saving of necessary parameters. The most efficient way is a random file from which grains with low weights get discarded. This method is routine and independent of any preknowledge of the texture or even the symmetries. Typically, the order of 100 grains are sufficient for strong textures or fiber textures. Furthermore, these grain… more
Date: January 1, 1990
Creator: Kocks, U.F. (Los Alamos National Lab., NM (USA)); Kallend, J.S. & Biondo, A.C. (Illinois Inst. of Tech., Chicago, IL (USA). Dept. of Metallurgy and Materials Engineering)
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