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Creating a word list for technical and clerical personnel

Description: The Savannah River Plant and Laboratory employ more than 16,000 people. When the separate Publications Divisions of the Plant and Laboratory were combined it was determined that a single source of information for using terms was needed, and that the source would take the form of a word list. The Word List was issued to more than 5000 employees onsite. In addition, the Word List is being added to the site computer network as a reference document and as an online spelling checker where more than … more
Date: May 1, 1988
Creator: Hammond, J S
Partner: UNT Libraries Government Documents Department
open access

Electron ray tracing programs for gun design and beam transport. [None]

Description: Computer simulation of electron and ion sources is made by using a class of computer codes known as gun design programs. In this paper, we shall first list most of the necessary and some optional capabilities of such programs. Then we will briefly note specific codes and/or authors of codes with attention to specialized applications if any. There may be many more such programs in use than are treated here; we are only trying to cover a range of examples, not perform a comprehensive survey.
Date: May 1, 1988
Creator: Herrmannsfeldt, W.B.
Partner: UNT Libraries Government Documents Department
open access

Two gauge boson physics at future colliders

Description: Electroweak unification suggests that there should be WW and ZZ physics analogous to {gamma}{gamma} physics. Indeed, WW and ZZ collisions will provide an opportunity to search for the Higgs boson at future high energy colliders. Cross sections in the picobarn range are predicted for Higgs boson production at the proposed 40-TeV SSC. While other states may be produced by WW and ZZ collisions, it is the Higgs boson that looms as the most attractive objective. 31 refs., 5 figs.
Date: May 13, 1988
Creator: Cahn, Robert N.
Partner: UNT Libraries Government Documents Department
open access

Low-energy structure of four-dimensional superstrings

Description: The N = 1, d = 4 supergravity theories derived as the low-energy limit of four-dimensional superstrings are discussed, focusing on the properties of their effective potentials. Gauge symmetry breaking is possible along several flat directions. A class of superpotential modifications is introduced, which describes supersymmetry breaking with vanishing cosmological constant and Str M{sup 2} = 0 at any minimum of the tree level potential. Under more restrictive assumptions, there are minima with b… more
Date: May 1, 1988
Creator: Zwirner, F.
Partner: UNT Libraries Government Documents Department
open access

The role of biotechnology in the treatment of geothermal residual sludges

Description: Power plants which use geothermal heat to generate electric power produce a residual sludge in large quantities. This material precipitates from supersaturated brines and contains toxic metals, some of which are present in concentrations exceeding the non hazardous waste disposal regulations. Disposal of this waste as hazardous waste is costly. Work in this laboratory has shown that a biotreatment of the geothermal waste in which toxic metal resistant acidophilic organisms are used can serve as… more
Date: May 1, 1988
Creator: Premuzic, E.T. & Lin, M.S.
Partner: UNT Libraries Government Documents Department
open access

Effects of undulators on the ALS: The early work on the LBL (Lawrence Berkeley Laboratory)

Description: In this paper we describe the early work carried out at LBL on the consequences of installing insertion devices (wigglers and undulators) on the beam dynamics of the ALS. This included analytical and tracking studies, and led to an insight to the reasons behind the predicted reduction in dynamic aperture. For completeness, a description of the unperturbed storage ring characteristics are also given. 3 refs., 16 figs., 2 tabs.
Date: May 1, 1988
Creator: Jackson, A.
Partner: UNT Libraries Government Documents Department
open access

A FASTBUS-based software trigger for the Mark II detector at the SLC

Description: A new software trigger scheme has been developed to augment and enhance the existing charged and neutral triggers by providing sensitivity to new event topologies and some level of control over accelerator-induced backgrounds. Historically, the Mark II existed with two primary trigger components: a charged track finder based upon the central and vertex drift chambers and the time-of-flight counters; and an electromagnetic trigger based upon the total energy deposited in each of ten calorimeter … more
Date: May 1, 1988
Creator: Aleksan, R.; Briggs, D.; Glanzman, T.; Grosse-Wiesmann, P.; Holmgren, S.; Komamiya, S. et al.
Partner: UNT Libraries Government Documents Department
open access

Physics at the superconducting supercollider

Description: Summary of lectures presented in the Shell Seminar Series at the national convention of the National Science Teachers Association, April 7-10, 1988. Topics covered are: The Standard model, symmetry breaking, the superconducting supercollider, physics at the TEV scale, and the early universe.
Date: May 23, 1988
Creator: Gaillard, M. K.
Partner: UNT Libraries Government Documents Department
open access

Material behavior and materials problems in TFTR (Tokamak Fusion Test Reactor)

Description: This paper reviews the experience with first-wall materials over a 20-month period of operation spanning 1985--1987. Experience with the axisymmetric inner wall limiter, constructed of graphite tiles, will be described including the necessary conditioning procedures needed for impurity and particle control of high power ({le}20 MW) neutral injection experiments. The thermal effects in disruptions have been quantified and no significant damage to the bumper limiter has occurred as a result of di… more
Date: May 1, 1988
Creator: Dylla, H. F.; Ulrickson, M. A.; Owens, D. K.; Heifetz, D. B.; Mills, B. E.; Pontau, A. E. et al.
Partner: UNT Libraries Government Documents Department
open access

The design of low emittance electron storage rings

Description: We have considered high tune'' electron storage rings as a possible source of low emittance beams. The parameters of such rings are studied in the limit where the emittance is determined by intrabeam scattering. Rings with either superconducting or conventional magnets are considered. The object is to maximize the ratio of electrons/bunch to invariant emittance while maintaining a certain fixed intensity. We have also calculated the dynamic aperture for one ring of this type.
Date: May 1, 1988
Creator: Hand, L.N. & Lundgren, S.
Partner: UNT Libraries Government Documents Department
open access

Insertion device vacuum system designs

Description: Synchrotron light source insertion device vacuum systems now in operation and systems proposed for the future are reviewed. An overview of insertion devices is given and four generic vacuum chamber designs, transition section design and pumping considerations are discussed. Examples of vacuum chamber systems are presented.
Date: May 1, 1988
Creator: Hoyer, E.
Partner: UNT Libraries Government Documents Department
open access

Spin-spin correlations in proton-proton collisions at high energy and threshold enhancements

Description: The striking effects in the spin structure observed in elastic proton collisions and the Nuclear Transparency phenomenon recently discovered at BNL are described in terms of heavy quark threshold enhancements. The deviations from scaling laws and the broadening of the angular distributions at resonance are also consistent with the introduction of new degrees of freedom in the pp system. This implies new s-channel physics. Predictions are given for the spin effects in pp collisions near 18.5 GeV… more
Date: May 1, 1988
Creator: de Teramond, G.F.
Partner: UNT Libraries Government Documents Department
open access

Symplectic maps for accelerator lattices

Description: We describe a method for numerical construction of a symplectic map for particle propagation in a general accelerator lattice. The generating function of the map is obtained by integrating the Hamilton-Jacobi equation as an initial-value problem on a finite time interval. Given the generating function, the map is put in explicit form by means of a Fourier inversion technique. We give an example which suggests that the method has promise. 9 refs., 9 figs.
Date: May 1, 1988
Creator: Warnock, R.L.; Ruth, R. & Gabella, W.
Partner: UNT Libraries Government Documents Department
open access

A new glove-box system for a high-pressure tritium pump

Description: A new glove-box system that was designed around a high-pressure tritium pump is described. The system incorporates new containment ideas such as ''burpler'' passive pressure controls, valves that can be turned from outside the box, inflatable door seals, ferro-fluidic motor-shaft seals, and rapid box-to-hood conversion during cryostaging. Currently under construction, the system will contain nine separate sections with automatic pressure-balancing and venting systems. 3 refs., 5 figs.
Date: May 26, 1988
Creator: Wilson, S. W.; Borree, R. J.; Chambers, D. I.; Chang, Y.; Merrill, J. T.; Souers, P. C. et al.
Partner: UNT Libraries Government Documents Department
open access

Equivalence of two formalisms for calculating higher order synchrotron sideband spin resonances

Description: Synchrotron sideband resonances of a first order spin resonance are generally regarded as the most important higher order spin resonances in a high-energy storage ring. Yokoya's formula for these resonances is rederived, including some extra terms, which he neglected, but which turn out to be of comparable magnitude to the terms retained. Including these terms, Yokoya's formalism and the SMILE algorithm are shown to be equivalent to leading order in the resonance strengths. The theoretical calc… more
Date: May 11, 1988
Creator: Mane, S.R.
Partner: UNT Libraries Government Documents Department
open access

Reduced enrichment for research and test reactors: Proceedings

Description: The international effort to develop new research reactor fuel materials and designs based on the use of low-enriched uranium, instead of highly-enriched uranium, has made much progress during the eight years since its inception. To foster direct communication and exchange of ideas among the specialist in this area, the Reduced Enrichment Research and Test Reactor (RERTR) Program, at the Argonne National Laboratory, sponsored this meeting as the ninth of a series which began in 1978. All previou… more
Date: May 1, 1988
Partner: UNT Libraries Government Documents Department
open access

First results from ASP on resonance production in. gamma gamma. interactions

Description: The reaction e/sup +/e/sup -//yields/e/sup +/e/sup -//gamma/sup *//gamma/sup *///yields/(e/sup +/e/sup -/)/eta/, with subsequent decay of the /eta/ into two photons, has been observed with the ASP detector at the PEP e/sup +/e/sup -/ storage ring at /radical/ s=29 GeV. A measurement of the radiative width of the /eta/ yields the preliminary result /Gamma/(/eta//yields//gamma//gamma/) = .489 /+-/ .009 /+-/ .055 keV. Evidence for the production of the /eta/' with decay into two photons has also b… more
Date: May 1, 1988
Creator: Roe, N.
Partner: UNT Libraries Government Documents Department
open access

Effect of empty buckets on coupled bunch instability in RHIC Booster: Longitudinal phase-space simulation

Description: Excitation of large amplitude coherent dipole bunch oscillations by beam induced voltages in spurious narrow resonances are simulated using a longitudinal phase-space tracking code (ESME). Simulation of the developing instability in a high intensity proton beam driven by a spurious parasitic resonance of the rf cavities allows one to estimate the final longitudinal emittance of the beam at the end of the cycle, which puts serious limitations on the machine performance. The growth of the coupled… more
Date: May 1, 1988
Creator: Bogacz, S. A.; Griffin, J. E. & Khiari, F. Z.
Partner: UNT Libraries Government Documents Department
open access

Summary of working group on collective instabilities

Description: In this paper we summarize the efforts of the Working Group on Collective Instabilities at the Workshop on the RHIC Performance. Impedance estimates have been made for some of the main hardware in RHIC, including bellows, pickup electrodes, abort kicker, and transverse damper. In general, these impedances are not expected to limit the beam intensity for Au ions, but might limit the proton intensity. We have also calculated the higher-order modes of the standard 26.7-MHz rf cavity for use in est… more
Date: May 1, 1988
Creator: Zisman, M. S.
Partner: UNT Libraries Government Documents Department
open access

Evolution of heavy-element abundances in the galactic halo and disk

Description: The constraints on the universal energy density and cosmological constant from cosmochronological ages and the Hubble age are reviewed. Observational evidence for the galactic chemical evolution of the heavy-element chronometers is described in the context of numerical models. The viability of the recently discovered Th/Nd stellar chronometer is discussed, along with the suggestion that high r-process abundances in metal-poor stars may have resulted from a primordial r-process, as may be requir… more
Date: May 1, 1988
Creator: Mathews, G. J.; Cowan, J. J. & Schramm, D. N.
Partner: UNT Libraries Government Documents Department
open access

Rf breakdown studies in room temperature electron linac structures

Description: This paper is an overall review of studies carried out by the authors and some of their colleagues on RF breakdown, Field Emission and RF processing in room temperature electron linac structure. The motivation behind this work is twofold: in a fundamental way, to contribute to the understanding of the RF breakdown phenomenon, and as an application, to determine the maximum electric field gradient that can be obtained and used safely in future e/sup +-/ linear colliders. Indeed, the next generat… more
Date: May 1, 1988
Creator: Loew, G.A. & Wang, J.W.
Partner: UNT Libraries Government Documents Department
open access

Rf power sources

Description: This paper covers RF power sources for accelerator applications. The approach has been with particular customers in mind. These customers are high energy physicists who use accelerators as experimental tools in the study of the nucleus of the atom, and synchrotron light sources derived from electron or positron storage rings. This paper is confined to electron-positron linear accelerators since the RF sources have always defined what is possible to achieve with these accelerators. 11 refs., 13 … more
Date: May 1, 1988
Creator: Allen, M. A.
Partner: UNT Libraries Government Documents Department
open access

Design, implementation, and operation of a class based batch queue scheduler for VAX/VMS

Description: Fermilab found that the standard VMS batch configuration options were inadequate for the job mix that exists on the Fermilab central computer facility VAX cluster. Accordingly, Fermilab designed and implemented a class based batch queue scheduler. This scheduler makes use of the standard VMS job controller and batch system. Users interact with the scheduler at job submission time by specification of CPU time limits and batch job characteristics. This scheduler allows Fermilab to make efficient … more
Date: May 20, 1988
Creator: Chadwick, K.
Partner: UNT Libraries Government Documents Department
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