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Quark deconfinement and high energy nuclear collisions

Description: Statistical QCD predicts that with increasing density, strongly interacting matter will undergo a transition to a plasma of deconfined quarks and gluons. High energy heavy ion collisions are expected to permit experimental studies of this transition and of the predicted new state of matter. 22 refs., 6 figs.
Date: July 1, 1986
Creator: Satz, H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Stock Assessment of Columbia River Anadromous Salmonids: Final Report, Volume 1. Chinook, Coho, Chum and Sockeye Salmon Summaries.

Description: The purpose was to identify and characterize the wild and hatchery stocks of salmon and steelhead in the Columbia River Basin on the basis of currently available information. This report provides a comprehensive compilation of data on the status and life histories of Columbia Basin salmonid stocks.
Date: July 1, 1986
Creator: Howell, Philip J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Steady-state and transient radionuclide transport through penetrations in nuclear waste containers

Description: The transport of radionuclides through penetrations in wastes containers is analyzed. Penetrations may result from corrosion or cracks and may occur in the original container material, in degraded or corroded material, or in deposits of corrosion products. In this report we do not consider how these penetrations occur or the characteristics of expected penetrations in waste containers. We are concerned here only with the analytical formulation and solutions of equations to predict rates of mass… more
Date: July 1, 1986
Creator: Chambre, P. L.; Lee, W. W. L.; Kim, C. L. & Pigford, T. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Linear accelerators of the future

Description: Some of the requirements imposed on future linear accelerators to be used in electron-positron colliders are reviewed, as well as some approaches presently being examined for meeting those requirements. RF sources for use in these linacs are described, as well as wakefields, single bunches, and multiple-bunch trains. (LEW)
Date: July 1, 1986
Creator: Loew, G.A.
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Partner: UNT Libraries Government Documents Department
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Highlights of the heavy ion fusion symposium

Description: The current status and prospects for inertial confinement fusion based on the use of intense beams of heavy ions will be described in the light of results presented at the International Symposium on Heavy Ion Fusion, (Washington, DC, May 27-29, 1986).
Date: July 1, 1986
Creator: Keefe, D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Charge-exchange measurements of MHD activity during neutral beam injection in the Princeton Large Torus and the Poloidal Divertor Experiment

Description: The horizontally scanning, multiangle charge-exchange analyzers on the Princeton Large Torus (PLT) and the Poloidal Divertor Experiment (PDX) were used to study the effects of MHD activity on the background ion distribution function and on the beam ion slowing-down process during high-power neutral injection. Sawtooth oscillations were observed in the fast ion flux on PLT and PDX, and measurements with neutral beams providing local neutral density enhancement indicate that ions are transported … more
Date: July 1, 1986
Creator: Goldston, R. J.; Kaita, R.; Beiersdorfer, P.; Gammel, G.; Herndon, D. L.; McCune, D. C. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Nonlinear evolution of drift instabilities in the presence of collisions

Description: Nonlinear evolution of drift instabilities in the presence of electron-ion collisions in a shear-free slab has been studied by using gyrokinetic particle simulation techniques as well as by solving, both numerically and analytically, model mode-coupling equations. The purpose of the investigation is to determine the mechanisms responsible for the nonlinear saturation of the instability and for the ensuing steady-state transport. Such an insight is very valuable for understanding drift wave prob… more
Date: July 1, 1986
Creator: Federici, J. F.; Lee, W. W. & Tang, W. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fragmentation model applied to exclusive final states in photon-photon collisions

Description: Monte Carlo calculations with the Lund string fragmentation model are compared to experimental results on the reactions ..gamma gamma -->..2..pi../sup +/2..pi../sup -/, ..gamma gamma -->..K/sup +/K/sup -/..pi../sup +/..pi../sup -/ and ..gamma gamma -->..p anti p..pi../sup +/..pi../sup -/. It is found, that when the parameters of the Lund model are tuned to low energy, inclusive multi hadron production in photon-photon collisions, the cross sections of exclusive processes near threshold are qual… more
Date: July 1, 1986
Creator: Buijs, A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Coupled-channel analysis of neutron scattering from /sup 12/C between 9 and 15 MeV

Description: A deformed and energy dependent phenomenological optical model potential and coupled-channel formalism for deformed nuclei have been used in the analysis of elastic and inelastic (Q = 4.439 MeV) scattering, and analyzing power for neutrons scattered from /sup 12/C in the energy range of 9 to 15 MeV. 6 refs., 1 fig., 1 tab.
Date: July 1, 1986
Creator: Hansen, L. F. & Meigooni, A. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Front-end data processing the SLD data acquisition system

Description: The data acquisition system for the SLD detector will make extensive use of parallel at the front-end level. Fastbus acquisition modules are being built with powerful processing capabilities for calibration, data reduction and further pre-processing of the large amount of analog data handled by each module. This paper describes the read-out electronics chain and data pre-processing system adapted for most of the detector channels, exemplified by the central drift chamber waveform digitization a… more
Date: July 1, 1986
Creator: Nielsen, B. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Review and problem definition of water/rock reactions associated with injection of spent geothermal fluids from a geothermal plant into aquifers

Description: Among the technical problems faced by the burgeoning geothermal industry is the disposal of spent fluids from power plants. Except in unusual circumstances the normal practice, especially in the USA, is to pump these spent fluids into injection wells to prevent contamination of surface waters, and possibly in some cases, to reduce pressure drawdown in the producing aquifers. This report is a survey of experience in geothermal injection, emphasizing geochemical problems, and a discussion of appr… more
Date: July 1, 1986
Creator: Elders, W. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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MEVVA ion source for high current metal ion implantation

Description: The MEVVA (Metal Vapor Vacuum Arc) ion source is a new kind of source which can produce high current beams of metal ions. Beams of a wide range of elements have been produced, spanning the periodic table from lithium up to and including uranium. The source extraction voltage is up to 60 kV, and we are increasing this up to 120 kV. A total ion beam current of over 1 Ampere has been extracted from the present embodiment of the concept, and this is not an inherent limit. The ion charge state distr… more
Date: July 1, 1986
Creator: Brown, I. & Washburn, J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Control of beam dynamics in high energy induction linacs

Description: The Advent of laser-ion-guiding in the Advanced test Accelerator along with the development of accelerator cavities optimized with respect to beam breakup coupling impedence now make it possible to consider a new class of high current, high emergy linear induction accelerators. The control of the beam breakup and other instabilities by laser guiding and by various magnetic focusing schemes will be discussed along with the scaling laws for the design of such machines to minimize the growth of th… more
Date: July 29, 1986
Creator: Caporaso, G.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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User's manual for FENAT: a two-dimensional multigroup diffusion theory Finite Element Neutral Atom Transport code

Description: FENAT solves the two-dimensional energy dependent diffusion equation in Cartesian (X-Y) and cylindrical/toroidal (R-Z) coordinates. The boundary conditions allowed are: vacuum, reflection, albedo and surface source. The energy variable is treated by multigroup method. The resulting multigroup diffusion equation is solved by finite element Galerkin's method with triangular element discretization of the spatial domain. The algebraic matrix equation is solved by the direct method of Crout variatio… more
Date: July 1, 1986
Creator: Hasan, M.Z.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Remarks on the clump theory

Description: Further details are provided of a soon-to-be published dialog (Phys. Fluids 29 (July, 1986)) which discussed the role of the small scales in fluid clump theory. It is argued that the approximation of the clump lifetime which is compatible with exponentially rapid separation of adjacent orbits is inappropriate for the description of the dynamically important large scales. Various other remarks are made relating to the analytic treatment of strong drift-wave-like turbulence.
Date: July 1, 1986
Creator: Krommes, John A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Passive correction of persistent current multipoles in superconducting accelerator dipoles

Description: Correction of the magnetization sextupole and decapole fields with strips of superconductor placed just inside the coil winding is discussed. Calculations have been carried out for such a scheme, and tests have been conducted on a 4 cm aperture magnet. The calculated sextupole correction at the injection excitation of 330 A, 5% of full field, was expected to be 77% effective, while the measured correction is 83%, thus suggesting the scheme may be useful for future accelerators such as SSC and L… more
Date: July 1, 1986
Creator: Fisk, H.E.; Hanft, R.A.; Kuchnir, M. & McInturff, A.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Heat and mass transfer analysis of a desiccant dehumidifier matrix

Description: This report documents the SERI Single-Blow Test Facility's design, fabrication, and testing for characterizing desiccant dehumidifiers for solar cooling applications. The first test article, a silica-gel parallel-plate dehumidifier with highly uniform passages, was designed and fabricated. Transient heat and mass transfer data and pressure drop data across the dehumidifier were obtained. Available heat and mass transfer models were extended to the parallel-place geometry, and the experimental d… more
Date: July 1, 1986
Creator: Pesaran, A.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Power transport to the PDX scoop limiter

Description: Power transport to the PDX graphite scoop limiter was measured during both ohmic- and neutral-beam-heated discharges by observing its front face temperatures using an infrared camera. Measurements were made as a function of plasma density, current, position, fueling mode, and heating power for both co- and counter-neutral beam injection. The measured thermal load on the scoop limiter was 25 to 50% of the total plasma heating power. The measured peak front face midplane temperature was 1500/sup … more
Date: July 1, 1986
Creator: Kugel, H.W.; Bol, K.; Budny, R.; Fonck, R.; Goldston, R.; Grek, B. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Observation of impurity accumulation and concurrent impurity influx in PBX

Description: Impurity studies in L- and H-mode discharges in PBX have shown that both types of discharges can evolve into either an impurity accumulative or nonaccumulative case. In a typical accumulative discharge, Zeff peaks in the center to values of about 5. The central metallic densities can be high, n/sub met//n/sub e/ approx. = 0.01, resulting in central radiated power densities in excess of 1 W/cm/sup 3/, consistent with bolometric estimates. The radial profiles of metals obtained independently from… more
Date: July 1, 1986
Creator: Sesnic, S.S.; Fonck, R.J.; Ida, K.; Bol, K.; Couture, P.; Gammel, G. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Post-disruptive plasma loss in the Princeton Beta Experiment (PBX)

Description: The free-boundary, axisymmetric tokamak simulation code TSC is used to model the transport time scale evolution and positional stability of PBX. A disruptive thermal quench will cause the plasma column to move inward in major radius. It is shown that the plasma can then lose axisymmetric stability, causing it to displace exponentially off the midplane, terminating the discharge. We verify the accuracy of the code by modeling several controlled experiments shots in PBX.
Date: July 1, 1986
Creator: Jardin, S. C.; DeLucia, J.; Okabayashi, M.; Pomphrey, N.; Reusch, M.; Kaye, S. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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High-spin nuclear spectroscopy

Description: High-spin spectroscopy is the study of the changes in nuclear structure, properties, and behavior with increasing angular momentum. It involves the complex interplay between collective and single-particle motion, between shape and deformation changes, particle alignments, and changes in the pairing correlations. A review of progress in theory, experimentation, and instrumentation in this field is given. (DWL)
Date: July 1, 1986
Creator: Diamond, R. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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ICF drivers: a comparison of some new entries and old standbys. Revision 1

Description: There has been a great deal of progress in recent years on the development of solid state and KrF lasers, light ion diodes, and heavy ion accelerators for use as drivers in inertial confinement fusion (ICF) facilities. Two relatively new entries in the ICF driver derby are the free electron laser (FEL) and the compact torus (CT). The status and remaining technological challenges of each potential driver are described. The author discusses driver performance criteria for various reactor applicat… more
Date: July 31, 1986
Creator: Hogan, W.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Scaling of current density, total current, emittance, and brightness for hydrogen negative ion sources

Description: The atomic and molecular processes that play a principal role in negative ion formation in a hydrogen negative ion discharge are discussed. The collisions of energetic electrons with gas molecules within the discharge lead to vibrationally excited molecules. Thermal electrons in turn attach to these excited molecules and generate negative ions via the dissociative attachment process. A system geometry chosen to optimize these collision processes is discussed that consists of a high-power discha… more
Date: July 10, 1986
Creator: Hiskes, J.R.
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Partner: UNT Libraries Government Documents Department
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Method for Assigning Sites to Projected Generic Nuclear Power Plants

Description: Pacific Northwest Laboratory developed a method for forecasting potential locations and startup sequences of nuclear power plants that will be required in the future but have not yet been specifically identified by electric utilities. Use of the method results in numerical ratings for potential nuclear power plant sites located in each of the 10 federal energy regions. The rating for each potential site is obtained from numerical factors assigned to each of 5 primary siting characteristics: (1)… more
Date: July 1, 1986
Creator: Holter, G. M.; Purcell, W. L.; Shutz, M. E. & Young, J. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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