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Computing tools for accelerator design

Description: An algorithm has been developed that calculates and obtains information about nonlinear contributions in accelerators. The comparison of the results obtained from this program ''NONLIN'' and HARMON is discussed and illustrated for the SSC-CDR clustered lattices.
Date: June 1, 1986
Creator: Parsa, Z.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Probing nuclear matter with dileptons

Description: Dileptons are shown to be of interest in helping probe extreme conditions of temperature and density in nuclear matter. The current state of experimental knowledge about dileptons is briefly described, and their use in upcoming experiments with light ions at CERN SPS are reviewed, including possible signatures of quark matter formation. Use of dileptons in an upcoming experiment with a new spectrometer at Berkeley is also discussed. This experiment will probe the nuclear matter equation of stat… more
Date: June 1, 1986
Creator: Schroeder, L. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Lack of immediate effects from the 1979-80 Imperial and Victoria earthquakes on the exploited Cerro Prieto geothermal reservoir

Description: In 1979-1980 two large earthquakes of local magnitude (M/sub L/) greater than 6.0 occurred near the Cerro Prieto geothermal field. It has been suggested that related to these seismic events there was an abrupt temperature increase in the wells completed in the shallow (alpha) reservoir. A careful study of the geochemistry of the produced fluids, as well as a cursory reservoir engineering analysis, cannot confirm either the data or the hypothesis of a massive influx of hot water into the system … more
Date: June 1, 1986
Creator: Truesdell, A.H. & Lippmann, M.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Numerical studies of gravity effects in two-phase reservoirs

Description: Numerical studies are performed to investigate the effects of localized feed zones on the pressure transients in two-phase reservoirs. It is shown that gravity effects can significantly affect the pressure transients, because of the large difference in the density of liquid water and vapor. Pressure transients for shallow and deep feed zones and the resulting fluid flow patterns are discussed.
Date: June 1, 1986
Creator: Bodvarsson, G.S. & Cox, B.L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Personal extrapolation of CDF test beam use to the SSC

Description: The author's personal experience in test beam usage at CDF is used to predict SSC needs at the point of turn-on. It is concluded that the test beam demand will reflect the scale of effort involved in SSC detectors rather than the total number of them. Provision for later expansion is recommended. It is also recommended that the test beam facilities, as well as detector electronics, should reflect the available dynamic range; particularly, a single high energy beam derived from the SSC could be … more
Date: June 23, 1986
Creator: Nodulman, L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Indoor air quality measurements in 38 Pacific Northwest commercial buildings

Description: A Bonneville Power Administration-funded study monitored ventilation rates and a variety of indoor air pollutants in 38 Pacific Northwest commercial buildings. The buildings ranged in age from 6 months to 90 years, in size from 864 to 34,280 m/sup 2/, and occupancy from 25 to 2500 people. Building average formaldehyde (HCHO) concentrations were below the 20 ppB detection limit in 48% of the buildings. Nitrogen dioxide (NO/sub 2/) concentration averages ranged from 5 ppB to 43 ppB and were lower… more
Date: June 1, 1986
Creator: Turk, B. H.; Brown, J. T.; Geisling-Sobotka, K.; Froehlich, D. A.; Grimsrud, D. T.; Harrison, J. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Laser neutralization

Description: Laser photodetachment of the excess electron to neutralize relativistic ions offers many advantages over the more conventional collisional methods using gases or thin foils as the neutralization agents. Probably the two most important advantages of laser photodetachment are the generation of a compact and low divergence beam, and the production of intense neutral beams at very high efficiency (approximately 90%). The high intensities or high current densities of the neutral beam result from the… more
Date: June 17, 1986
Creator: Peterson, O.G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Is a 4-train support ''always'' more reliable than a 2-train support

Description: Once the gross features of a frontline fluid system have been defined, one must consider what support system configuration will provide the best overall system performance. This paper considers different dc bus configurations for a given emergency feedwater system. Results indicate that a four-train support system (i.e., 4 dc buses) gives a lower system unavailability for transients, but a higher system unavailability for Anticipated Transients Without Scram (ATWS), than a two-train support sys… more
Date: June 1, 1986
Creator: Guey, C.N.; Arrieta, L. & Youngblood, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The Two-beam accelerator

Description: The Two-Beam Accelerator (TBA) consists of a long high-gradient accelerator structure (HGS) adjacent to an equal-length Free Electron Laser (FEL). In the FEL, a beam propagates through a long series of undulators. At regular intervals, waveguides couple microwave power out of the FEL into the HGS. To replenish energy given up by the FEL beam to the microwave field, induction accelerator units are placed periodically along the length of the FEL. In this manner it is expected to achieve gradients… more
Date: June 1, 1986
Creator: Sessler, A. M. & Hopkins, D. B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Change in the particle action due to magnetic field perturbations in the SSC

Description: The motion of a particle in the linear lattice of the SSC is stable, that is, the Courant-Synder invariant (W/sub 0/) remains exactly constant and the betatron phase (psi) increase by (2..pi nu..) for every revolution around the circumference. However, when magnetic field perturbations are present around the ring, this mode of describing the motion is no longer valid. One can then still speak of action-angle variables (W,phi) which in the limit of zero perturbation reduce to the linear betatron… more
Date: June 1, 1986
Creator: Herrera, J.C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Electron dynamics with radiation and nonlinear wigglers

Description: The physics of electron motion in storage rings is described by supplementing the Hamiltonian equations of motion with fluctuating radiation reaction forces to describe the effects of synchrotron radiation. This leads to a description of radiation damping and quantum diffusion in single-particle phase-space by means of Fokker-Planck equations. For practical purposes, most storage rings remain in the regime of linear damping and diffusion; this is discussed in some detail with examples, concentr… more
Date: June 1, 1986
Creator: Jowett, J.M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Inertial fusion research at Lawrence Livermore National Laboratory: program status and future applications

Description: The objectives of the Lawrence Livermore National Laboratory (LLNL) Laser Fusion Program are to understand and develop the science and technology required to utilize inertial confinement fusion (ICF) for both military and commercial applications. The results of recent experiments are described. We point out the progress in our laser studies, where we continue to develop and test the concepts, components, and materials for present and future laser systems. While there are many potential commerci… more
Date: June 5, 1986
Creator: Meier, W. R. & Hogan, W. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Probing QCD in low energy anti pp collisions

Description: A number of exclusive and inclusive antiproton reactions are discussed which could provide useful constraints or test novel features of quantum chromodynamics in the intermediate momentum transfer domain involving both perturbative and non-perturbative dynamics. High momentum transfer reactions are briefly reviewed. Inclusive antiproton reactions and the QCD critical length, QCD predictions for proton-antiproton exclusive processes, and studies of the Compton amplitude in proton-antiproton anni… more
Date: June 1, 1986
Creator: Brodsky, Stanley J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Comparison of the Relative Importance of Helium and Vacancy Accumulation in Void Nucleation

Description: Void nucleation in irradiated austenitic stainless steels generally requires the presence of either residual or transmutant gases. Classical nucleation rates are much too low to account for the number of voids observed at temperatures greater than about 450/sup 0/C. An alternate path is generally believed to be responsible for void formation; viz. the growth of gas-stabilized bubbles until they reach a critical size beyond which further gas accumulation is not required to promote growth. Two li… more
Date: June 1, 1986
Creator: Stoller, R. E. & Odette, G. R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Construction of relativistic quantum theory: a progress report

Description: We construct the particulate states of quantum physics using a recursive computer program that incorporates non-determinism by means of locally arbitrary choices. Quantum numbers and coupling constants arise from the construction via the unique 4-level combinatorial hierarchy. The construction defines indivisible quantum events with the requisite supraluminal correlations, yet does not allow supraluminal communication. Measurement criteria incorporate c, h-bar and m/sub p/ or (not ''and'') G, c… more
Date: June 1, 1986
Creator: Noyes, H. Pierre
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Grazing incidence synchrotron radiation optics: correlation of performance with metrology

Description: Image distortions produced by a cylinder mirror at the National Synchrotron Light Source are compared with performance predictions based on measurements of surface slope errors in the millimeter spatial period regime made with an optical surface profiler.
Date: June 1, 1986
Creator: Takacs, P. Z.; Hewitt, R. C. & Church, E. L.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Spectral characteristics and power distribution from insertion devices on a 6 to 7 GeV storage ring

Description: Two different types of insertion devices - undulators and wigglers - are described and compared. Each provides a periodic magnetic field that alters polarity, but whereas the spectral distribution from a wiggler is continuous and wide, the radiation of an undulator has spectrally narrow and discrete peaks. The distinction is determined by the deflection parameter. The energy spread in undulator peaks is calculated. Insertion device magnets and gap are discussed. Undulator tunability from gap va… more
Date: June 1, 1986
Creator: Shenoy, G. K. & Viccaro, P. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Gauge invariant actions for string models

Description: String models of unified interactions are elegant sets of Feynman rules for the scattering of gravitons, gauge bosons, and a host of massive excitations. The purpose of these lectures is to describe the progress towards a nonperturbative formulation of the theory. Such a formulation should make the geometrical meaning of string theory manifest and explain the many ''miracles'' exhibited by the string Feynman rules. There are some new results on gauge invariant observables, on the cosmological c… more
Date: June 1, 1986
Creator: Banks, T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Transport of intense ion beams. [HIBALL II]

Description: The maximum transportable current for an ion beam is determined by considerations of focal strength, space charge equilibrium and stability, structural practically and emittance. These factors are described within the context of a heavy ion driver for Inertial Confinement Fusion. Recent supporting results from particle-in-cell simulations and transport experiments will be described.
Date: June 1, 1986
Creator: Lee, Edward P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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KMC unitarity and K/sup +/ yields. pi. /sup +/. nu. anti. nu

Description: Experimental constraints on the Kobayashi-MaskawaCabibbo (KMC) matrix are surveyed and shown to provide a test of the standard model at the level of its O (..cap alpha..) radioactive corrections. The three generation prediction BR (K/sup +/ ..-->.. ..pi../sup +/..nu..) approx. = (0.35 approx. 3) x 10/sup 10/ is reviewed and the potential for enhancement up to approx. = 3 x 10/sup -9/ due to the fourth generation mixing is described. 19 refs.
Date: June 1, 1986
Creator: Marciano, William J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Review of the classical nova outburst

Description: Observational studies have not only identified a new class of novae but theoretical simulations of this class have been found to be in excellent agreement with the observations. This new class consists of outbursts occurring on ONeMg white dwarfs in close binar systems in contrast to the other outbursts which are occurring on CO white dwarfs. We also review the effects of the ..beta../sup +/-unstable nuclei and show how their presence has a major effect on the evolution. 77 refs.
Date: June 1, 1986
Creator: Starrfield, S. & Sparks, W. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Development of a continuous duty cryopump

Description: The continuous output of large quantities of gases at low pressure from fusion reactors, principally helium and hydrogen isotopes, dictates the need for a high speed pumping system that operates continuously, efficiently, and automatically. A liquid helium-cooled cryopump operated by a microprocessor controller can meet these requirements. The prototype system described herein features a single cryopump with three distinct pumping units: two units for pumping the vacuum chamber arranged so that… more
Date: June 1, 1986
Creator: Sedgley, D. W.; Batger, T. H. & Call, W. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Computerized data acquisition system for production, injection and interference tests

Description: A computer-based system for collecting, processing, and analyzing pressure transient data has been developed. Primary components include downhole pressure sensors, linedrivers, a micro-computer, data storage disk, scanner, frequency counter, digital voltmeter, power supply, graphics plotter, and printer. In-field data processing and analysis greatly aid in handling the large volume of data that are collected during pressure transients tests, particularly the multiwell interference tests that ar… more
Date: June 1, 1986
Creator: Benson, S.M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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