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Bose-Einstein correlations in e/sup +/e/sup -/ collisions

Description: The MARK II detector is used to study the Bose-Einstein correlation between pairs and triplets of charged pions produced in hadronic decays of the J)psi), the ..sqrt..s = 4 to 7 GeV continuum above the J)psi), two photon events at ..sqrt..s = 29 GeV, and e/sup )plus/)e/sup )minus/) annihilation events at ..sqrt..s = 29 GeV as a function of Q/sup 2/, the four-momentum transfer squared. After corrections for Coulomb effects and pion misidentification, we find a nearly full Bose-Einstein enhanceme… more
Date: December 1, 1987
Creator: Juricic, I.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Front-end electronics development for the SSC

Description: This is a status report on electronics development undertaken by the Front-End Electronics Collaboration. The overall goal of the collaboration remains the development by 1992 of complete, architecturally compatible, front end electronic systems for calorimeter, wire drift chamber, and silicon strip readout. We report here a few highlights to give a brief overview of the work underway. Performance requirements and capabilities, selected architectures, circuit designs and test results are presen… more
Date: December 1, 1990
Creator: Levi, M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Significant Lifetime and Background Improvements in PEP-II by Reducing the 3rd Order Chromaticity in LER with Orbit Bumps

Description: Orbit bumps in sextupoles are routinely used for tuning the luminosity in the PEP-II B-Factory. Anti-symmetric bumps at a pair of identical sextupoles separated by -I section generate the net dispersion, while symmetric horizontal bumps induce a tune shift and beta beat. By combining two of these symmetric bumps with opposite signs, where the second pair is 90{sup o} away, the tune shift cancels and the beta beat doubles. In the low energy ring (LER), there are four -I sextupole pairs per arc, … more
Date: December 18, 2007
Creator: Decker, F. J.; Nosochkov, Y.; Sullivan, M. & Yocky, G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Observation of. lambda. -hypernuclei in the reaction /sup 12/C(. pi. /sup +/,K/sup +/)/sub. lambda. //sup 12/C

Description: The observation of ..lambda..-hypernuclear levels in /sub ..lambda..//sup 12/C by associated production through the (..pi../sup +/,K/sup +/) reaction is reported. Spectrometers used in the measurements are discussed. The /sub ..lambda..//sup 12/C excitation energy spectra were recorded at laboratory scattering angles of 5.6/sup 0/, 10.3/sup 0/, and 15.2/sup 0/. The spectra show two major peaks - one attributed to the ground state, and one about 11 MeV higher in excitation. The peak near 11 MeV … more
Date: December 1, 1985
Creator: Milner, E.C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Study of /sup 12/C interactions at HISS

Description: Single-particle inclusive measurements in high-energy nuclear physics have provided the foundation for a number of models of interacting nuclear fluids. Such measurements yield information on the endpoints of the evolution of highly excited nuclear systems. However, they suffer from the fact that observed particles can be formed in a large number of very different evolutionary paths. To learn more about how interactions proceed we have performed a series of experiments in which all fast nuclear… more
Date: December 1, 1982
Creator: Crawford, H.J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Nuclear Physics Research at the University of Richmond progress report, November 1, 1992--October 31, 1993

Description: Summarized in this report is the progress achieved during the period from November 1, 1992 to October 31, 1993 under Contract Number DE-FG05-88ER40459. The experimental work described in this report is in electromagnetic and heavy-ion nuclear physics. The effort in electromagnetic nuclear physics is in preparation for the research program at the Continuous Electron Beam Accelerator Facility (CEBAF) and is focussed on the construction and use of the CEBAF Large Acceptance Spectrometer (CLAS). Th… more
Date: December 31, 1993
Creator: Vineyard, M. F.; Gilfoyle, G. P. & Major, R. W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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The CDFII time-of-flight detector and impact on beauty flavor tagging

Description: Following the successful RunI from 1992 to 1996, the CDF detector has undergone a major upgrade [1] for the RunII which begun in March 2001. The approval for the addition of a Time-of-Flight detector was granted in January 1999. The installation of the TOF detector was completed in August 2001 and its data has been included in the CDFII readout since then. The primary physics motivation for TOF is to complement and enhance the particle identification capability provided by the central drift cha… more
Date: December 3, 2002
Creator: al., C. Grozis et
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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[Hadroproduction of charmed and bottom mesons (Fermilab experiment E-653): Progress report, March 31, 1984--April 1, 1985]

Description: This progress report describes U of Oklahoma participation in a number of detector development efforts. The first is a beam solid state device which was performance tested in runs during June and July, 1984. This was a partially instrumented test of an array of gridded solid state detectors. A beam drift chamber was also performance tested. This consist of 18 planes of 2 cells each. Each cell has drift distance of 18 mm on each side of the sense wire. Preliminary tests were also performed on a … more
Date: December 31, 1985
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Proceedings of the workshop on new solid state devices for high energy physics. [LBL, October 28-30, 1985]

Description: This paper contains articles on semiconductor devices used in the detection of high energy particles. Some articles reported: Position sensitive semiconductor devices; Scintillation techniques and optical devices; Radiation damage to detectors; VLSI for physics; and experience with Si detectors in NA32. (LSP)
Date: December 1, 1987
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Photon detector for MEGA. Progress report, July 16, 1991--May 31, 1992

Description: The MEGA photon detector is designed to observe the 52.83-MeV photon produced in a {mu} {yields} e{gamma} decay with an energy resolution of 1.25 MeV, a position resolution of 2 {times} 5 mm{sup 2}, a directional resolution of 10{degree}, a time resolution of 500 ps, and an efficiency of about 5.4%. It will consist of three independent concentric cylindrical pair spectrometers mounted within a 1.5 T magnetic field produced by a superconducting solenoid magnet. Each pair spectrometer includes tw… more
Date: December 1, 1992
Creator: Gagliardi, C. A. & Tribble, R. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Aging in the large CDF axial drift chamber

Description: The Central Outer Tracker (COT) is a large axial drift chamber in the Collider Detector at Fermilab operating with a gas mixture that is 50/50 argon/ethane with an admixture of 1.7% isopropanol. In its first two years of operation the COT showed unexpected aging with the worst parts of the chamber experiencing a gain loss of {approx}50% for an accumulated charge of {approx}35 mC/cm. By monitoring the pulse height of hits on good tracks, it was possible to determine the gain as a function of tim… more
Date: December 1, 2004
Creator: Allspach, D.; Ambrose, D.; Binkley, M.; Bromberg, C.; Burkett, K.; Kephart, R. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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[Medium energy meson research]

Description: The activities of this group are primarily concerned with experiments using the Crystal Barrel Detector. This detector is installed and operating at the Low Energy Antiproton Ring (LEAR) at CERN. QCD, the modem theory of the strong interaction, is reasonably well understood at high energies, but unfortunately, low-energy QCD is still not well understood, and is far from being adequately tested. The Crystal Barrel experiments are designed to provide some of the tests. The basic line of research … more
Date: December 1, 1992
Creator: Crowe, K. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Study of Charged Particle Species Produced in Association with B0, B-, and Bs Mesons in proton - anti-proton collisions at s**(1/2) = 1.96-TeV

Description: The authors study the yields of charged kaons, charged pions, and protons produced in association with B mesons produced in proton-antiproton collisions at center of mass energy 1960 GeV using 355 pb{sup -1} of data collected with the CDF detector at the Fermilab Tevatron. This is the first reported measurements of these yields at a hadron collider. The B mesons are reconstructed using their semileptonic decays: B{sup 0} {yields} {ell}{sup +}D{sup -}X, D{sup -} {yields} K{sup +}{pi}{sup -}{pi}{… more
Date: December 1, 2005
Creator: Usynin, Denys
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
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Large area silicon drift detectors for x-rays -- New results

Description: Large area silicon drift detectors, consisting of 8 mm and 12 mm diameter hexagons, were fabricated on 0.35 mm thick high resistivity n-type silicon. An external FET and a low-noise charge sensitive preamplifier were used for testing the prototype detectors. The detector performance was measured in the range 75 to 25 C using Peltier cooling, and from 0.125 to 6 {micro}s amplifier shaping time. Measured energy resolutions were 159 eV FWHM and 263 eV FWHM for the 0.5 cm{sup 2} and 1 cm{sup 2} det… more
Date: December 31, 1998
Creator: Iwanczyk, J. S.; Patt, B. E.; Tull, C. R.; Segal, J. D.; Kenney, C. J.; Bradley, J. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Nuclear physics research at the University of Richmond. Progress report, November 1, 1994--October 31, 1995

Description: Summarized in this report is the progress achieved during the period from November 1, 1994 to October 31, 1995. The experimental work described in this report is in electromagnetic and heavy-ion nuclear physics. The effort in electromagnetic nuclear physics is in preparation for the research program at the Continuous Electron Beam Accelerator Facility (CEBAF) and is focused on the construction and use of the CEBAF Large Acceptance Spectrometer (CLAS). The heavy-ion experiments were performed at… more
Date: December 31, 1995
Creator: Vineyard, M.F.; Gilfoyle, G.P. & Major, R.W.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Development in the design and performance of gas avalanche microdetectors (MSGC, MGC, and MDOT)

Description: There has been continuing development of generic classes of microstrip gas chambers (MSGCs), microgap gas chambers (MGCs) and microdot gas chambers (MDOTs) at Lawrence Berkeley National Laboratory (LBNL) over the past few years, to improve such detectors beyond their present capabilities, to produce detectors suitable for use in current or upcoming experiments, and to allow a basis for new R&D developments which may incorporate these detectors as part of the system. All of these new detectors a… more
Date: December 1, 1997
Creator: Cho, Hyo-Sung
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries Government Documents Department
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The design and construction of the muon arm in PHENIX. Progress report, December 15, 1994--December 1, 1995

Description: The purpose of this report is to describe activities performed by the Intermediate Energy Nuclear Physics Group (IENPG) at the Louisiana State University (LSU). During the preceding year the authors have been actively involved with three collaborations--the PHENIX Collaboration, the DLS Collaboration, and the E866 Collaboration at Fermilab--that are the foci of their activities. In addition they are members of a fourth collaboration, the AMY Collaboration at KEK, and in concert with other membe… more
Date: December 15, 1995
Creator: Kirk, P.N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Fixed target flammable gas upgrades

Description: In the past, fixed target flammable gas systems were not supported in an organized fashion. The Research Division, Mechanical Support Department began to support these gas systems for the 1995 run. This technical memo describes the new approach being used to supply chamber gasses to fixed target experiments at Fermilab. It describes the engineering design features, system safety, system documentation and performance results. Gas mixtures provide the medium for electron detection in proportional… more
Date: December 1, 1996
Creator: Schmitt, R.; Squires, B.; Gasteyer, T. & Richardson, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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Nuclear/High Energy Physics (NuHEP) research center of excellence

Description: This report contains the manuscripts from the proceedings of the third annual Undergraduate Institute in Physics Program. The titles of these manuscripts are: flow measurements for the hall c cryogenic target loops; calibrations for the hall c drift chambers gas mixing system; the electromagnetic structure of the nucleon; investigation of drift chambers in hall c at CEBAF; seek and ye shall find; commissioning techniques; and instruments used in particle detection.
Date: December 31, 1994
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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A multi-channel time-to-digital converter chip for drift chamber readout

Description: A complete, multi-channel, timing and amplitude measurement IC for use in drift chamber applications is described. By targeting specific resolutions, i.e. 6-bits of resolution for both time and amplitude, area and power can be minimized while achieving the proper level of measurement accuracy. Time is digitized using one eight channel TDC comprised of a delay locked loop and eight sets of latches and encoders. Amplitude (for dE/dx) is digitized using a dual-range FADC for each channel. Eight bi… more
Date: December 1, 1995
Creator: Santos, D.M.; Chau, A.; DeBusshere, D.; Dow, S.; Flasck, J.; Levi, M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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