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High-. beta. operation and MHD (magnetohydrodynamic) activity on TFTR

Description: Magnetohydrodynamic (MHD) activity within three zones (core, half- radius, and edge) of TFTR (Plasma Physics and Controlled Nuclear Fusion Research (1986), (IAEA, Vienna, 1987), Vol. 1, P. 51) tokamak plasmas are discussed. Near the core of the plasma column, sawteeth are often observed. Two types of sawteeth are studied in detail: one with complete, and the other with incomplete magnetic reconnection. Their characteristics are determined by the shape of the q profile. Near the half-radius the … more
Date: April 1, 1990
Creator: McGuire, K.
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Partner: UNT Libraries Government Documents Department
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Empirical estimates of the proton-neutron interaction and diabolical points

Description: The use of constant-N contours in the ({omega},{lambda}) plane is demonstrated both for establishing diabolical points and for studying regularities and fluctuations in the spectrum of single-particle states. Likewise the average properties and fluctuations of empirical proton-neutron interactions, obtained from double differentials of the total energy with respect to N and Z, are discussed for the ground states of all even-even nuclei with N > 40 and as a function of the rotational frequency f… more
Date: January 1, 1990
Creator: Zhang, J.-Y. (Academia Sinica, Beijing, BJ (China). Inst. of Theoretical Physics Brookhaven National Lab., Upton, NY (USA) Joint Inst. for Heavy Ion Research, Oak Ridge, TN (USA) Academia Sinica, Lanzhou, GS (China). Inst. of Modern Physics); Garrett, J.D. (Oak Ridge National Lab., TN (USA)); Casten, R.F. (Brookhaven National Lab., Upton, NY (USA)) & Brenner, D.S. (Clark Univ., Worcester, MA (USA)
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Partner: UNT Libraries Government Documents Department
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An evaluation of three models designed for siting wind turbines in areas of complex terrain

Description: The aim of this study was to compare the ability of three micrositing models to simulate the wind flow in complex terrain. One of these models, NOABL, is a mass-consistent model while the other two, MS3DJH/3R and BZ, are descendants of Jackson-Hunt (J-H) theory. All three models were applied to two areas of complex terrain, Askervein Hill in Scotland and Altamont Pass in California. Askervein Hill is an isolated hill of moderate slope surrounded by a flat plain. In marked contrast, the terrain … more
Date: June 1, 1990
Creator: Barnard, J.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Scattering and Localizability of ECH (Electron-Cyclotron Heating) Power in CIT (Compact Ignition Tokamak)

Description: The theory of scattering by drift-wave density fluctuations is applied to electron-cyclotron heating (ECH) in the Compact Ignition Tokamak (CIT). It is found for CIT that the scattering angles are small and have a Gaussian distribution. An analytic result is given for the average number of scattering events suffered by a ray during propagation through the turbulence layer; this average number is 1.3 for the turbulence level expected in CIT. Localizability of ECH power in CIT is also studied for… more
Date: January 1, 1990
Creator: Smith, G. R.
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Partner: UNT Libraries Government Documents Department
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Spectral solar radiation data base documentation

Description: The Solar Energy Research Institute (SERI), Electric Power Research Institute, Florida Solar Energy Center, and Pacific Gas and Electric Company cooperated to produce a spectral solar radiation data base representing a range of atmospheric conditions. These data will help to characterize the natural variability in the spectral (color) content of outdoor solar radiation so that the sensitivity of spectrally selective solar devices (such as photovoltaics) to these variations can be studied quanti… more
Date: January 1, 1990
Creator: Riordan, G.J.; Myers, D.R. & Hulstrom, R.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Japanese power electronics inverter technology and its impact on the American air conditioning industry

Description: Since 1983, technological advances and market growth of inverter- driven variable-speed heat pumps in Japan have been dramatic. The high level of market penetration was promoted by a combination of political, economic, and trade policies in Japan. A unique environment was created in which the leading domestic industries-- microprocessor manufacturing, compressors for air conditioning and refrigerators, and power electronic devices--were able to direct the development and market success of inver… more
Date: August 1, 1990
Creator: Ushimaru, Kenji.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Thermodynamic properties of fluids from Fluctuation Solution Theory

Description: Fluctuation Theory develops exact relations between integrals of molecular correlation functions and concentration derivatives of pressure and chemical potential. These quantities can be usefully correlated, particularly for mechanical and thermal properties of pure and mixed dense fluids and for activities of strongly nonideal liquid solutions. The expressions yield unique formulae for the desirable thermodynamic properties of activity and density. The molecular theory origins of the flucuatio… more
Date: January 1, 1990
Creator: O'Connell, J.P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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An edge density fluctuation diagnostic for DIII-D using lithium beams

Description: In order to investigate fluctuations in the edge regions of tokamaks and their influence on particle and energy transport, we are developing an {tilde n} diagnostic for DIII-D system based on an injected neutral lithium beam. Analysis of the 670.8 nm light emitted along the beam trajectory due to collisional excitation should yield the behavior of the electron density and its associated fluctuations in the edge region of DIII-D in both L- and H-mode plasma configurations. The planned system, de… more
Date: September 1, 1990
Creator: Thomas, D. M.; Hyatt, A. W. & Thomas, M. P.
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Partner: UNT Libraries Government Documents Department
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Natural groundwater recharge and water balance at the Hanford Site

Description: The purpose of this report is to present water-balance data collected in 1988 and 1989 from the 300 Area Buried Waste Test Facility and Grass Site, and the 200 East Area closed-bottom lysimeter. This report is an annual update of previous recharge status reports by Gee, Rockhold, and Downs, and Gee. Data from several other lysimeter sites are included for comparison. 43 refs., 28 figs., 7 tabs.
Date: January 1, 1990
Creator: Rockhold, M.L.; Fayer, M.J.; Gee, G.W. & Kanyid, M.J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Turbulence in slurry pipe flow

Description: The present state of knowledge of liquid-solid flows (slurries) is far behind than that for single phase flows. Very few geometries have been examined with a slurry and only with a limited variation of system parameters i.e. fluid viscosity, particle diameter, etc. This paper presents the first part of a study which examines the effects of the addition of a solid to the flow through a confined coaxial jet. Presented here will be the initial conditions for the jet which correspond to fully devel… more
Date: January 1, 1990
Creator: Gore, R.A. (Los Alamos National Lab., NM (USA)) & Crowe, C.T. (Washington State Univ., Pullman, WA (USA). Dept. of Mechanical and Materials Engineering)
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Partner: UNT Libraries Government Documents Department
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Confinement studies in the ZT-40M reversed field pinch

Description: Measurement of electrostatic and magnetic fluctuations in the ZT-40M Reversed Field Pinch (RFP) are used to estimate fluctuation driven transport. Edge electrostatic fluctuations appear to explain edge particle transport, analogously to some tokamak and stellarator observations. However, in contrast to tokamaks, electrostatic fluctuations do not explain the heat flux through the edge. Instead, transport of suprathermal electrons along fluctuating magnetic field lines constitute the major electr… more
Date: January 1, 1990
Creator: Weber, P. G.; Schoenberg, K. F.; Ingraham, J. C.; Miller, G.; Moses, R. W.; Munson, C. P. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Natural Current Profiles in a Tokamak

Description: In this paper I show how one may arrive at a universal, or natural, family of Tokamak profiles using only accepted physical principles. These particular profiles are similar to ones proposed previously on the basis of ad hoc variational principles and the point of the present paper is to provide a justification for them. However in addition, the present work provides an interesting view of Tokamak fluctuations and leads to a new result -- a relationship between the inward particle pinch velocit… more
Date: August 1, 1990
Creator: Taylor, J. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Haze in the Grand Canyon: An evaluation of the Winter Haze Intensive Tracer Experiment

Description: The Grand Canyon is one of the most spectacular natural sights on earth. Approximately 4 million visitors travel to Grand Canyon National Park (GCNP) each year to enjoy its majestic geological formations and intensely colored views. However, visibility in GCNP can be impaired by small increases in concentrations of fine suspended particles that scatter and absorb light; the resulting visibility degradation is perceived as haze. Sulfate particles are a major factor in visibility impairment at Gr… more
Date: October 1, 1990
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The ATF two-frequency correlation reflectometer

Description: The Advanced Toroidal Facility (ATF) density fluctuation reflectometer system consists of two individual reflectometers operating in the 30- to 40-GHz band. Each reflectometer consists of a tunable microwave source and a quadrature phase detector connected to the same antenna system. This arrangement allows two-frequency operation along the same radial chord for radial coherence measurements. The technique used in making radial coherence measurements is discussed and the results of such experim… more
Date: January 1, 1990
Creator: Hanson, G. R.; Wilgen, J. B.; Anabitarte, E.; Bell, J. D.; Harris, J. H.; Dunlap, J. L. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The application of correlation techniques to the angular spectrum of scattered radiation from tokamak plasmas

Description: In the limit of the first Born approximation for a partially coherent secondary source, consisting of a spatially random plasma illuminated by a coherent plane wave, it is shown that the spectral coherence of the scattered radiation as measured on an arbitrary plane beyond the scatterer conveys information on the three dimensional intensity distribution of the random source. By defining a new two point statistical measure of the random field, closely related to the cross spectral density, we sh… more
Date: July 1, 1990
Creator: Nazikian, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Daytime wind valleys adjacent to the Great Salt Lake

Description: In 1986 Los Alamos National Laboratory was engaged by the US Army to study the meteorological aspects of emergency preparedness at several sites where toxic materials are stored and handled. The project included a series of tracer and meteorological field experiments in the vicinity of the Tooele Army Depot. These experiments generated a large data set for validating numerical simulations and for empirical analyses of the local meteorology. This paper discusses the main characteristics of the d… more
Date: January 1, 1990
Creator: Stone, G.L. (Los Alamos National Lab., NM (USA)) & Hoard, D.E. (Amparo Corp., Santa Fe, NM (USA))
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Partner: UNT Libraries Government Documents Department
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Pacific Northwest Laboratory annual report for 1989 to the DOE (Department of Energy) Office of Energy Research - Part 3: Atmospheric Sciences

Description: This 1989 Annual Report from Pacific Northwest Laboratory (PNL) to the US Department of Energy (DOE) describes research in environment, safety, and health conducted during fiscal year 1989. The report again consists of five parts, each in a separate volume. This volume contains research in the atmospheric sciences. Currently, the broad goals of atmospheric research at PNL are to describe and predict the nature and fate of atmospheric contaminants and to develop an understanding of the atmospher… more
Date: June 1, 1990
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Advanced development of particle beam probe diagnostic systems

Description: This progress report covers the period starting with the approval to go ahead with the 2 MeV heavy ion beam probe (HIBP) for TEXT Upgrade to the submission of the grant renewal proposal. During this period the co-principal investigators, R. L. Hickok and T. P. Crowley have each devoted 45% of their time to this Grant. Their effort has been almost exclusively devoted to the design and fabrication of the 2 MeV HIBP system. The 1989 report that described the advantages of a 2 MeV HIBP for TEXT Upg… more
Date: November 1, 1990
Creator: Hickok, R. L.; Crowley, T. P. & Connor, K. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The economics of long-term global climate change

Description: This report is intended to provide an overview of economic issues and research relevant to possible, long-term global climate change. It is primarily a critical survey, not a statement of Administration or Department policy. This report should serve to indicate that economic analysis of global change is in its infancy few assertions about costs or benefits can be made with confidence. The state of the literature precludes any attempt to produce anything like a comprehensive benefit-cost analysi… more
Date: September 1, 1990
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Measurement of magnetic fluctuations on ZT-40(M)

Description: The mathematical basis for experimental measurement of magnetic fluctuations in a Reversed Field Pinch is reviewed. A quasi-static drift model is introduced as the frame-work for analysis of the five-fixed-probe technique. The extrapolation of edge-measured {rvec B}{sub r} fluctuations into the plasma is discussed. Correlations between magnetic and other fluctuations expected from a quasi-static model are derived and transport-relevant correlations are discussed. Data from ZT-40(M) are presente… more
Date: January 1, 1990
Creator: Miller, G.
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Partner: UNT Libraries Government Documents Department
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Asymptotic analysis of the longitudinal instability of a heavy ion induction linac

Description: An Induction Linac accelerating high ion currents at sub-relativistic energies is predicted to exhibit unstable growth of current fluctuations at low frequencies. The instability is driven by the interaction between the beam and complex impedance of the induction modules. In general, the detailed form of the growing disturbance depends on the initial perturbation and ratio of pulse length to accelerator length, as well as the specific form of the impedance. An asymptotic analysis of the several… more
Date: September 1, 1990
Creator: Lee, E.P. & Smith, L.
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Partner: UNT Libraries Government Documents Department
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Comparison of Experimental and Theoretical XEDS Cross-Sections and K-Factors as a Function of Accelerating Voltage

Description: For nearly fifteen years k-factor measurements have been made by varying the composition of the standards at fixed accelerating voltage and reporting the change in the experimental k-factor with atomic number. From this data a best model of the ionization cross-section is frequently proposed for use in quantitative x ray analysis in the AEM, however it is valid only at that fixed voltage. It is usually difficult to judge the validity of the selection of cross-section using this type of plot and… more
Date: January 1, 1990
Creator: Zaluzec, N. J.
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Partner: UNT Libraries Government Documents Department
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Modelling of drift wave turbulence with a finite ion temperature gradient

Description: With the use of consistent orderings in {var epsilon} = {rho}{sub s}/a and {delta} = k{sub {perpendicular}}{rho}{sub s} model equations are derived for the drift instabilities from the electrostatic two-fluid equations. The electrical resistivity {eta} included in the system allows the dynamics of both the collisional drift wave instability ({eta} {ne} 0) and the collisionless ion temperature gradient driven instability ({eta} = 0). The model equations used extensively in earlier nonlinear stud… more
Date: October 1, 1990
Creator: Hamaguchi, S. & Horton, W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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