Search Results

Advanced search parameters have been applied.
open access

Performance of the CRID at SLD

Description: This paper describes the performance of a large 4{pi} Cherenkov Ring Imaging Detector (CRID) in the SLD experiment at the SLC at SLAC. We compare the most recent SLD results with those obtained during the R&D period, discuss various design features, and highlight some specific lessons derived from three years of operation.
Date: June 1, 1993
Creator: Abe, K.; Antilogus, P. & Aston, D.
Partner: UNT Libraries Government Documents Department
open access

Results from the SLD barrel CRID detector

Description: We report on operational experience with and experimental performance of the SLD barrel Cherenkov Ring Imaging Detector from the 1992 and 1993 physics runs. The liquid (C{sub 6}F{sub 14}) and gas (C{sub 5}F{sub 12}) radiator recirculation systems have performed well, and the drift gas supply system has operated successfully with TMAE for three years. Cherenkov rings have been observed from both the liquid and gas radiators. The number and angular resolution of Cherenkov photons have been measur… more
Date: November 1, 1993
Creator: Abe, K.; Antilogus, P. & Aston, D.
Partner: UNT Libraries Government Documents Department
open access

The fluid systems for the SLD Cherenkov ring imaging detector. [01]

Description: We describe the design and operation of the fluid delivery, monitor and control systems for the SLD barrel Cherenkov Ring Imaging Detector (CRID). The systems deliver drift gas (C[sub 2]H[sub 6] + TMAE), radiator gas (C[sub 5]F[sub 12] + N[sub 2]) and radiator liquid (C[sub 6]F[sub 14]). Measured critical quantities such as electron lifetime in the drift gas and ultra-violet (UV) transparencies of the radiator fluids, together with the operational experience, are also reported.
Date: October 1, 1992
Creator: Abe, K.; Hasegawa, K.; Hasegawa, Y.; Iwasaki, Y.; Suekane, F.; Yuta, H. (Tohoku Univ., Sendai (Japan). Dept. of Physics) et al.
Partner: UNT Libraries Government Documents Department
open access

The fluid systems for the SLD Cherenkov ring imaging detector

Description: We describe the design and operation of the fluid delivery, monitor and control systems for the SLD barrel Cherenkov Ring Imaging Detector (CRID). The systems deliver drift gas (C{sub 2}H{sub 6} + TMAE), radiator gas (C{sub 5}F{sub 12} + N{sub 2}) and radiator liquid (C{sub 6}F{sub 14}). Measured critical quantities such as electron lifetime in the drift gas and ultra-violet (UV) transparencies of the radiator fluids, together with the operational experience, are also reported.
Date: October 1, 1992
Creator: Abe, K.; Hasegawa, K.; Hasegawa, Y.; Iwasaki, Y.; Suekane, F.; Yuta, H. et al.
Partner: UNT Libraries Government Documents Department
open access

The endcap Cherenkov ring imaging detector at SLD

Description: The authors present the Cherenkov Ring Imaging Detector in the endcap regions of the SLD detector and report initial performance. The endcap CRID was completed and commissioned in 1993 and is fully operational for the 1994 run. First Cherenkov rings have been observed. The endcap CRID detectors and fluid systems are described and initial operational experience is discussed.
Date: 1995-11~
Creator: Abe, K.; Hasegawa, K.; Hawegawa, Y.; Iwasaki, Y.; Suekane, F.; Yuta, H. et al.
Partner: UNT Libraries Government Documents Department
open access

Initial performance of the SLD Cherenkov Ring Imaging Detector system

Description: All of the major subsystems for the barrel Cherenkov Ring Imaging Detector (CRID) in the SLD at SLAC have now been commissioned. The CRID participated in the SLD engineering run of June--August 1991. In a cosmic ray test at the end of the run, Cherenkov rings were observed for the first time. Initial data from the CRID, including Cherenkov rings, studies of minimum ionizing particles, and data from the fiber optics calibration system are presented here.
Date: November 1, 1991
Creator: Abe, K.; Hasegawa, K.; Suekane, F.; Yuta, H. (Tohoku Univ., Sendai (Japan). Dept. of Physics); Antilogus, P.; Aston, D. et al.
Partner: UNT Libraries Government Documents Department
open access

Performance of the front end electronics and data acquisition system for the SLD Cherenkov Ring Imaging Detector

Description: The front end electronics and data acquisition system for the SLD barrel Cherenkov Ring Imaging Detector (CRID) are described. This electronics must provide a 1% charge division measurement with a maximum acceptable noise level of 2000 electrons (rms). Noise and system performance results are presented for the initial SLD engineering run data.
Date: November 1, 1991
Creator: Abe, K.; Hasegawa, K.; Suekane, F.; Yuta, H. (Tohoku Univ., Sendai (Japan). Dept. of Physics); Antilogus, P.; Aston, D. et al.
Partner: UNT Libraries Government Documents Department
open access

Initial performance of the SLD Cherenkov Ring Imaging Detector system

Description: All of the major subsystems for the barrel Cherenkov Ring Imaging Detector (CRID) in the SLD at SLAC have now been commissioned. The CRID participated in the SLD engineering run of June--August 1991. In a cosmic ray test at the end of the run, Cherenkov rings were observed for the first time. Initial data from the CRID, including Cherenkov rings, studies of minimum ionizing particles, and data from the fiber optics calibration system are presented here.
Date: November 1, 1991
Creator: Abe, K.; Hasegawa, K.; Suekane, F.; Yuta, H.; Antilogus, P.; Aston, D. et al.
Partner: UNT Libraries Government Documents Department
open access

Performance of the front end electronics and data acquisition system for the SLD Cherenkov Ring Imaging Detector

Description: The front end electronics and data acquisition system for the SLD barrel Cherenkov Ring Imaging Detector (CRID) are described. This electronics must provide a 1% charge division measurement with a maximum acceptable noise level of 2000 electrons (rms). Noise and system performance results are presented for the initial SLD engineering run data.
Date: November 1, 1991
Creator: Abe, K.; Hasegawa, K.; Suekane, F.; Yuta, H.; Antilogus, P.; Aston, D. et al.
Partner: UNT Libraries Government Documents Department
open access

Current Performance of the SLD VXD3

Description: During 1996, the SLD collaboration completed construction and began operation of a new charge-coupled device (CCD) vertex detector (VXD3). Since then, its performance has been studied in detail and a new topological vertexing technique has been developed. In this paper, we discuss the design of VXD3, procedures for aligning it, and the tracking and vertexing improvements that have led to its world-record performance.
Date: September 14, 1999
Creator: Abe, Toshinori
Partner: UNT Libraries Government Documents Department
open access

Design and performance of the SLD Vertex Detector, a 120 Mpixel tracking system

Description: This paper describes the design, construction, and initial operation of the SLD Vertex Detector, the first device to employ charge coupled devices (CCDs) on a large scale in a high energy physics experiment. The Vertex Detector comprises 480 CCDs, with a total of 120 Mpixels. Each pixel functions as an independent particle detecting element, providing space point measurements of charged particle tracks with a typical precision of 5 {mu}m in each co-ordinate. The CCDs are arranged in four concen… more
Date: March 1, 1992
Creator: Agnew, G. D.; Cotton, R. & Damerell, C. J. S.
Partner: UNT Libraries Government Documents Department
open access

The 1992 Polarized Light Source

Description: We describe the Polarized Light Sources used at SLAC during the 1992 runs of the experiments SLD and E142.
Date: April 1, 1993
Creator: Alley, R.; Woods, M.; Browne, M.; Frisch, J. & Zolotorev, M.
Partner: UNT Libraries Government Documents Department
open access

Status of A{sub LR} measurement at SLD

Description: The SLD Collaboration is making a precision measurement of the left-right asymmetry (A{sub LR}) at the SLAC Linear Collider, exploiting the significantly improved luminosity and the high electron-beam polarization of over 60%. General features of the polarized source and polarimetry are described. The experimental method is briefly presented, together with the preliminary values of the raw asymmetry, which should lead to a precision in the measurement of sin{sup 2}{theta}{sub W}{sup eff} of {pl… more
Date: November 1, 1993
Creator: Ash, W. W.
Partner: UNT Libraries Government Documents Department
open access

Summary of experimentation issues

Description: The conveners of the parallel session on Experimentation--assembled a group that well represented the spectrum of topics and the international community that is doing the work. This paper is an attempt to summarize the thirteen talks given in that session. Since the speakers often covered similar topics from different viewpoints or reflected work going on in different labs, I have borrowed from each of the contributor`s presentations and rearranged them according to the list of topics. I urge t… more
Date: July 1, 1993
Creator: Ash, W. W.
Partner: UNT Libraries Government Documents Department
open access

Measurement of {alpha}{sub s} from hadronic event observables at the Z{sup 0} resonance

Description: We have measured the strong coupling {alpha}{sub s}(M{sub Z}{sup 2}) using hadronic decays of Z{sup o} bosons collected by the SLD experiment at SLAC. The data were compared with QCD predictions both at fixed order O({alpha}{sub s}{sup 2}) and including resummed analytic formulae based on the next-to-leading logarithm approximation. We have performed a comprehensive analysis using event shapes, jet rates, particle correlations, and angular energy flows, and have checked the consistency between … more
Date: August 1995
Creator: Baird, K. & Collaboration, The SLD
Partner: UNT Libraries Government Documents Department
open access

A study of K{sub s} {Lambda} and {bar {Lambda}} production in hadronic Z{sup 0} decays

Description: We present a preliminary measurement of the inclusive production rates of K{sub s}, A and X hadrons produced in e{sup +}e{sup {minus}} annihilation at the Z{sup 0} pole. The analysis is based upon approximately 50K Z{sup 0} decays collected in the SLD experiment at SLAC in 1993. The observed rates of (K{sub s}) = 1.02 {plus_minus} 0.02 {plus_minus} 0.09 and ({Lambda}) + ({bar {Lambda}}) = 0.38 {plus_minus} 0.01 {plus_minus} 0.04 are consistent with previous measurements. Our differential cross … more
Date: August 1, 1994
Creator: Baird, K. G.
Partner: UNT Libraries Government Documents Department
open access

Elementary Particle Physics and High Energy Phenomena

Description: This report discusses the following research in high energy physics: the properties of the z neutral boson with the SLD detector; the research and development program for the SDC muon detector; the fixed-target k-decay experiments; the Rocky Mountain Consortium for HEP; high energy photoproduction of states containing heavy quarks; and electron-positron physics with the CLEO II and Mark II detectors. (LSP).
Date: June 1, 1992
Creator: Barker, A. R.; Cumalat, J. P.; de Alwis, S. P.; DeGrand, T. A.; Ford, W. T.; Mahanthappa, K. T. et al.
Partner: UNT Libraries Government Documents Department
open access

Elementary Particle Physics and High Energy Phenomena. Progress Report for FY92

Description: This report discusses the following research in high energy physics: the properties of the z neutral boson with the SLD detector; the research and development program for the SDC muon detector; the fixed-target k-decay experiments; the Rocky Mountain Consortium for HEP; high energy photoproduction of states containing heavy quarks; and electron-positron physics with the CLEO II and Mark II detectors. (LSP).
Date: June 1, 1992
Creator: Barker, A. R.; Cumalat, J. P.; de Alwis, S. P.; DeGrand, T. A.; Ford, W. T.; Mahanthappa, K. T. et al.
Partner: UNT Libraries Government Documents Department
open access

First results from the SLD silicon calorimeters

Description: The small-angle calorimeters of the SLD were successfully operated during the recent SLC engineering run. The Luminosity Monitor and Small-Angle Tagger (LMSAT) covers the angular region between 28 and 68 milliradians from the beam axis, while the Medium-Angle Silicon Calorimeter (MASC) covers the 68--190 milliradian region. Both are silicon-tungsten sampling calorimeters; the LMSAT employs 23 layers of 0.86 X{sub 0} sampling, while the MASC has 10 layers of 1.74 X{sub 0} sampling. We present re… more
Date: July 1, 1992
Creator: Berridge, S. C.; Bugg, W. M.; Kroeger, R. S.; Weidemann, A. W.; White, S. L. (Tennessee Univ., Knoxville, TN (United States). Dept. of Physics and Astronomy); Brau, J. E. et al.
Partner: UNT Libraries Government Documents Department
open access

First results from the SLD silicon calorimeters

Description: The small-angle calorimeters of the SLD were successfully operated during the recent SLC engineering run. The Luminosity Monitor and Small-Angle Tagger (LMSAT) covers the angular region between 28 and 68 milliradians from the beam axis, while the Medium-Angle Silicon Calorimeter (MASC) covers the 68--190 milliradian region. Both are silicon-tungsten sampling calorimeters; the LMSAT employs 23 layers of 0.86 X{sub 0} sampling, while the MASC has 10 layers of 1.74 X{sub 0} sampling. We present re… more
Date: July 1, 1992
Creator: Berridge, S. C.; Bugg, W. M.; Kroeger, R. S.; Weidemann, A. W.; White, S. L.; Brau, J. E. et al.
Partner: UNT Libraries Government Documents Department
open access

Pulse-by-pulse energy measurement at the Stanford Linear Collider

Description: The stanford Linear Collider (SLC) collides a beam of electrons and positrons at 92 GeV. It is the first colliding linac, and produces Z{sup 0} particles for High-Energy Physics measurements. The energy of each beam must be measured to one part in 10{sup 4} on every collision (120 Hz). An Energy Spectrometer in each beam line after collision produces two stripes of high-energy synchrotron radiation with critical energy of a few MeV. The distance between these two stripes at an imaging plane mea… more
Date: January 1, 1992
Creator: Blaylock, G. (California Univ., Santa Cruz, CA (United States)); Briggs, D.; Collins, B. & Petree, M. (Stanford Linear Accelerator Center, Menlo Park, CA (United States))
Partner: UNT Libraries Government Documents Department
open access

Pulse-by-pulse energy measurement at the Stanford Linear Collider

Description: The stanford Linear Collider (SLC) collides a beam of electrons and positrons at 92 GeV. It is the first colliding linac, and produces Z{sup 0} particles for High-Energy Physics measurements. The energy of each beam must be measured to one part in 10{sup 4} on every collision (120 Hz). An Energy Spectrometer in each beam line after collision produces two stripes of high-energy synchrotron radiation with critical energy of a few MeV. The distance between these two stripes at an imaging plane mea… more
Date: January 1, 1992
Creator: Blaylock, G.; Briggs, D.; Collins, B. & Petree, M.
Partner: UNT Libraries Government Documents Department
open access

Theory of elementary particles and accelerator theory: Task C: Experimental high energy physics. Annual progress report

Description: The experimental high energy physics group at the University of Oregon broadened its effort during the past year. The SLD effort extends from maintaining and operating the SLD luminosity monitor which was built at Oregon, to significant responsibility in physics analysis, such as event selection and background analysis for the left-right asymmetry measurement. The OPAL work focussed on the luminosity monitor upgrade to a silicon-tungsten calorimeter. Building on the work done at Oregon for SLD,… more
Date: December 31, 1992
Creator: Brau, J. E.
Partner: UNT Libraries Government Documents Department
open access

Design and performance of a new 307 Mpixel CCD vertex detector

Description: During the past year, the SLD Collaboration completed construction and began operation of a new vertex detector (VXD3) with 307,000,000 CCD pixels. This upgrade will improve the SLD measurement of the polarization-enhanced forward-backward asymmetry for b and c-quarks and the precision of the measurement of the b-fraction in hadronic Z decays and opens the possibility to observe B{sub s}{sup 0}-mixing. Full separation of primary, secondary and tertiary vertices is accessible.
Date: September 1, 1996
Creator: Brau, James E.
Partner: UNT Libraries Government Documents Department
Back to Top of Screen