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Elementary Particle Interactions, Progress Report to Department of Energy: October 1991 - September 1992

Description: Work continues on strange particle production in weak interactions using data from a high-energy neutrino exposure in a freon bubble chamber. Meson photoproduction has also consumed considerable effort. Detector research and development activities have been carried out.
Date: October 1992
Creator: Bugg, W. M.; Condo, G. T.; Handler, T.; Hart, E. L.; Read, K. & Ward, B. F. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Search for exotic particles at CDF

Description: We have searched for exotic particles in p[bar p] collisions at 1.8 TeV in data taken with the Collider Detector at Fermilab. We review our published limits on W[prime] and Z[prime] masses, and on the scale of lepton-quark compositeness. We also report preliminary mass limits based on searches for leptoquarks, supersymmetric quarks and gluons, and exotic, stable colored fermions.
Date: October 1, 1992
Creator: Gold, M.S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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SLD liquid argon calorimeter

Description: The liquid argon calorimeter (LAC) of the SLD detector is a parallel plate -- liquid argon sampling calorimeter, used to measure particle energies in Z[sup 0] decays at the Stanford Linear Collider. The LAC module design is based on a unique projective tower structure, in which lead plates and segmented lead tiles serve both as absorbers and electrodes. The LAC front end electronics incorporates several novel features, including extensive multiplexing and optical fiber readout, which take advan… more
Date: October 1, 1992
Creator: Vella, E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Fundamental mechanisms in flue gas conditioning

Description: This project is divided into four tasks. We developed our management plan in Task 1. Task 2, evaluation of mechanisms in FGD sorbent and ash interactions, focuses on characteristics of binary mixtures of these distinct powders. Task 3, evaluation of mechanisms in conditioning agents and ash, is designed to examine effects of various conditioning agents on fine ash particles to determine mechanisms by which these agents alter physical properties of ash. We began Tasks 2 and 3 with an extensive l… more
Date: October 27, 1992
Creator: Snyder, T. R. & Vann Bush, P.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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CsI calorimeter development for a high-precision, general-purpose detector for a Tau-Charm Factory

Description: Design, fabrication techniques, and preliminary tests for a CsI calorimeter for the Tau-Charm Factory (TCF) proposed for construction in Spain are presented. Selected CsI calorimeter studies undertaken by the US Tau-Charm Collaboration, including simulations of machine-induced detector backgrounds in the CsI calorimeter, radiation change characterization of CsI(Tl) and CsI(Na) crystals from five manufacturers, crystal segmentation and photodiode/wavelength shifter readout schemes, and developme… more
Date: October 1, 1992
Creator: King, M.E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Theory of normal and superconducting properties of fullerene-based solids

Description: Recent experiments on the normal-state and superconducting properties of fullerene-based solids are used to constrain the proposal theories of the electronic nature of these materials. In general, models of superconductivity based on electron pairing induced by phonons are consistent with electronic band theory. The latter experiments also yield estimates of the parameters characterizing these type H superconductors. It is argued that, at this point, a standard model'' of phonons interacting wi… more
Date: October 1, 1992
Creator: Cohen, M.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The D0 experiment at Fermilab

Description: The D0 experiment at Fermilab is described. The detector is complete and presently taking physics data. Results from beam tests of the calorimeter and an outline of the physics agenda for the present run are also given.
Date: October 1, 1992
Creator: Heintz, U.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Hadron spectrum of quenched QCD on a 32[sup 3] [times] 64 lattice

Description: Preliminary results from a hadron spectrum calculation of quenched Quantumchromodynamics on a 32[sup 3] [times] 64 lattice at [beta] = 6.5 are reported. The hadron spectrum calculation is done with staggered quarks of masses, m[sub q]a = 0.001, 0.005 and 0.0025. We use two different sources in order to be able to extract the [Delta] mass in addition to the usual local light hadron masses. The numerical simulation is executed on the Intel Touchstone Delta computer. The peak speed of the Delta fo… more
Date: October 1, 1992
Creator: Kim, Seyong & Sinclair, D.K.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Aerosol particle analysis by Raman scattering technique

Description: Laser Raman spectroscopy is a very versatile tool for chemical characterization of micron-sized particles. Such particles are abundant in nature, and in numerous energy-related processes. In order to elucidate the formation mechanisms and understand the subsequent chemical transformation under a variety of reaction conditions, it is imperative to develop analytical measurement techniques for in situ monitoring of these suspended particles. In this report, we outline our recent work on spontaneo… more
Date: October 1, 1992
Creator: Fung, K.H. & Tang, I.N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Ammonium generation during SRAT cycle

Description: During the IDMS noble-metal demonstration runs ammonium nitrate deposition was found in the vessel vent system of the feed preparation area. In the bench-scale experiments of studying the hydrogen generation during the sludge treatment cycle, ammonium ion production was also monitored. It was found that: During a simulation of the DWPF Cold Chemical Runs SRAT cycle no detectable amount of ammonium ions was generated when treating a non-noble-metal containing sludge simulant according to the nit… more
Date: October 13, 1992
Creator: Hsu, C.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Hydraulic testing of modified neutron source rod in type Q septifoil

Description: A Type Q septifoil, two modified partial length control rods, four full length control rods, a source rod containing a dummy neutron source and a guide tube assembly were installed in the Long Term Flow Facility (LTFF) of the HTL. The water level inside the guide tubes over the septifoil was measured by the use of sight tubes connected to pressure taps on the guide tubes or by pressure gages. Pressures were measured at tank bottom and inside the septifoil. The target tank bottom pressure for th… more
Date: October 1, 1992
Creator: Steimke, J. L. & Fowley, M. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Integrated low emissions cleanup system for direct coal fueled turbines (moving bed, fluid bed contactor/ceramic filter)

Description: The United States Department of Energy, Morgantown Energy Research Center (DOE/METC), is sponsoring the development of direct coal-fired turbine power plants as part of their Heat Engines program. A major technical challenge remaining for the development of the direct coal-fired turbine is high-temperature combustion gas cleaning to meet environmental standards for sulfur oxides and particulate emissions, as well as to provide acceptable turbine life. The Westinghouse Electric Corporation, Scie… more
Date: October 20, 1992
Creator: Newby, R. A.; Alvin, M. A.; Bachovchin, D. M.; Yang, W. C.; Smeltzer, E. E. & Lippert, T. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Single track effects, biostack and risk assessment

Description: This talk addresses the single-track nature of the space radiation environment, and points out the importance of single hits'' in the evaluation of radiation risk for long-term missions occurring outside the earth's magnetic field. A short review is made of biological objects found to show increased effects when hit'' by a single heavy charged-particle in space. A brief discussion is given of the most provocative results from the bacterial spore B. subtilis: experimental evidence that tracks ca… more
Date: October 1, 1992
Creator: Curtis, S.B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Pulse-jet baghouse performance improvement with flue gas conditioning

Description: A pilot study was conducted at the Energy and Environmental Research Center (EERC) at the University of North Dakota to evaluate the effectiveness of flue gas conditioning in reducing tube sheet pressure drop and fine particulate emissions from a pulse-jet fabric filter. The project was jointly funded by the US Department of Energy (DOE), the Electric Power Research Institute (EPRI), and the Canadian Electrical Association (CEA). The work was completed with EERC facilities consisting of a pulve… more
Date: October 1, 1992
Creator: Miller, S. J. & Laudal, D. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Negative ion detachment cross sections. [Physics Dept. , College of William and Mary, Williamsburg, Virginia]

Description: The authors have measured absolute cross sections for electron detachment and charge exchange for collision of O and S with atomic hydrogen, have investigated the sputtering and photodesorption of negative ions from gas covered surfaces, and have begun an investigation of photon-induced field emission of electrons from exotic structures. Brief descriptions of these activities as well as future plans for these projects are given below.
Date: October 1, 1992
Creator: Champion, R.L. & Doverspike, L.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The D0 experiment at Fermilab

Description: The D0 experiment at Fermilab is described. The detector is complete and presently taking physics data. Results from beam tests of the calorimeter and an outline of the physics agenda for the present run are also given.
Date: October 1, 1992
Creator: Heintz, U.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Multi-jet production rates in deep-inelastic muon-proton scattering

Description: Measurements of forward multi-jet production rates in deep-inelastic muonproton scattering are presented. Data were taken with a 490 GeV muon beam incident on a hydrogen target. Jets were defined using the JADE jet finding algorithm. The measured rates are presented as function of W, the hadronic center-of-mass energy and the jet resolution parameter, y{sub cut}, in energies up to W=33 GeV. Good agreement is found in comparisons with predictions of the QCD-inspired Lund Monte Carlo models. Non-… more
Date: October 1, 1992
Creator: Salgado, C. W. & Collaboration, E665
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Software for parallel processing applications

Description: Parallel computing has been used to solve large computing problems in high-energy physics. Typical problems include offline event reconstruction, monte carlo event-generation and reconstruction, and lattice QCD calculations. Fermilab has extensive experience in parallel computing using CPS (cooperative processes software) and networked UNIX workstations for the loosely-coupled problems of event reconstruction and monte carlo generation and CANOPY and ACPMAPS for Lattice QCD. Both systems will b… more
Date: October 1, 1992
Creator: Wolbers, S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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First W decays observed with the D0 detector

Description: We have observed the first few W decays into electrons at the Tevatron, using the newly commissioned D0 detector. Preliminary results are presented. The number of observed decays as well as the transverse momentum of the electron, the neutrino and their transverse mass distributions, are consistent with expectations.
Date: October 1, 1992
Creator: Gobbi, B.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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The D0 upgrade

Description: The original D0 detector was proposed in 1983, with a focus on high P{sub T} physics using precision measurements of e`s, {mu}`s, jets, and missing E{sub T}. This detector, as of the summer of 1992, has started data taking at the Fermilab Collider. However, by 1995/6 the luminosity will reach 10{sup 31} cm{sup {minus}2}sec{sup {minus}1}, and the minimum bunch spacing will drop to 396ns from the present 3.5{mu}s (by the Main Injector era, luminosities will approach 10{sup 32} cm{sup {minus}2}sec… more
Date: October 1, 1992
Creator: Tuts, P. M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Searches for massive neutrinos in nuclear beta decay

Description: The status of searches for massive neutrinos in nuclear beta decay is reviewed. The claim by an ITEP group that the electron antineutrino mass > 17eV has been disputed by all the subsequent experiments. Current measurements of the tritium beta spectrum limit m{sub {bar {nu}}e} < 10 eV. The status of the 17 keV neutrino is reviewed. The strong null results from INS Tokyo and Argonne, and deficiencies in the experiments which reported positive effects, make it unreasonable to ascribe the spectral… more
Date: October 1, 1992
Creator: Jaros, J. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Physics of a high-luminosity Tau-Charm Factory

Description: This paper highlights the physics capabilities of a Tau-Charm Factory; i.e., high luminosity ({approximately}10{sup 33}cm{sup {minus}2}s{sup {minus}1}) e{sup +}e{sup {minus}} collider operating in the center-of-mass energy range of 3-5 GeV, with a high-precision, general-purpose detector. Recent developments in {tau} and charm physics are emphasized.
Date: October 1, 1992
Creator: King, M. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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