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PEP quark search proportional chambers

Abstract

Proportional chambers are used in the PEP Free Quark Search to identify and remove possible background sources such as particles traversing the edges of counters, to permit geometric corrections to the dE/dx and TOF information from the scintillator and Cerenkov counters, and to look for possible high cross section quarks. The present beam pipe has a thickness of 0.007 interaction lengths (lambdasub(i)) and is followed in both arms each with 45/sup 0/ <= theta <= 135/sup 0/, ..delta..phi=90/sup 0/ by 5 proportional chambers, each 0.0008 lambdasub(i) thick with 32 channels of pulse height readout, and by 3 thin scintillator planes, each 0.003 lambdasub(i) thick. Following this thin front end, each arm of the detector has 8 layers of scintillator (one with scintillating light pipes) interspersed with 4 proportional chambers and a layer of lucite Cerenkov counters. Both the calculated ion statistics and measurements using He-CH/sub 4/ gas in a test chamber indicate that the chamber efficiencies should be >98% for q=1/3. The Landau spread measured in the test was equal to that observed for normal q=1 traversals. One scintillator plane and thin chamber in each arm will have an extra set of ADC's with a wide gate bracketing the normal  More>>
Authors:
Parker, S I; Harris, F; Karliner, I; Yount, D; [1]  Ely, R; Hamilton, R; Pun, T; [2]  Guryn, W; Miller, D; Fries, R [3] 
  1. Hawaii Univ., Honolulu (USA)
  2. California Univ., Berkeley (USA). Lawrence Berkeley Lab.
  3. Northwestern Univ., Evanston, IL (USA)
Publication Date:
Apr 01, 1981
Product Type:
Conference
Reference Number:
AIX-12-642040; ERA-07-011706; EDB-82-022022
Resource Relation:
Journal Name: Phys. Scr.; (Sweden); Journal Volume: 23:4; Conference: International conference on experimentation at LEP, Uppsala, Sweden, 15 - 20 Jun 1980
Subject:
43 PARTICLE ACCELERATORS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; PEP STORAGE RINGS; PROPORTIONAL COUNTERS; CHERENKOV COUNTERS; EFFICIENCY; PARTICLE TRACKS; QUARKS; RADIATION DETECTION; SCINTILLATION COUNTERS; SPECIFICATIONS; DETECTION; ELEMENTARY PARTICLES; MEASURING INSTRUMENTS; POSTULATED PARTICLES; RADIATION DETECTORS; STORAGE RINGS; 430400* - Particle Accelerators- Storage Rings; 440104 - Radiation Instrumentation- High Energy Physics Instrumentation
OSTI ID:
6002597
Country of Origin:
Sweden
Language:
English
Other Identifying Numbers:
Journal ID: CODEN: PHSTB
Submitting Site:
INIS
Size:
Pages: 658-661
Announcement Date:

Citation Formats

Parker, S I, Harris, F, Karliner, I, Yount, D, Ely, R, Hamilton, R, Pun, T, Guryn, W, Miller, D, and Fries, R. PEP quark search proportional chambers. Sweden: N. p., 1981. Web.
Parker, S I, Harris, F, Karliner, I, Yount, D, Ely, R, Hamilton, R, Pun, T, Guryn, W, Miller, D, & Fries, R. PEP quark search proportional chambers. Sweden.
Parker, S I, Harris, F, Karliner, I, Yount, D, Ely, R, Hamilton, R, Pun, T, Guryn, W, Miller, D, and Fries, R. 1981. "PEP quark search proportional chambers." Sweden.
@misc{etde_6002597,
title = {PEP quark search proportional chambers}
author = {Parker, S I, Harris, F, Karliner, I, Yount, D, Ely, R, Hamilton, R, Pun, T, Guryn, W, Miller, D, and Fries, R}
abstractNote = {Proportional chambers are used in the PEP Free Quark Search to identify and remove possible background sources such as particles traversing the edges of counters, to permit geometric corrections to the dE/dx and TOF information from the scintillator and Cerenkov counters, and to look for possible high cross section quarks. The present beam pipe has a thickness of 0.007 interaction lengths (lambdasub(i)) and is followed in both arms each with 45/sup 0/ <= theta <= 135/sup 0/, ..delta..phi=90/sup 0/ by 5 proportional chambers, each 0.0008 lambdasub(i) thick with 32 channels of pulse height readout, and by 3 thin scintillator planes, each 0.003 lambdasub(i) thick. Following this thin front end, each arm of the detector has 8 layers of scintillator (one with scintillating light pipes) interspersed with 4 proportional chambers and a layer of lucite Cerenkov counters. Both the calculated ion statistics and measurements using He-CH/sub 4/ gas in a test chamber indicate that the chamber efficiencies should be >98% for q=1/3. The Landau spread measured in the test was equal to that observed for normal q=1 traversals. One scintillator plane and thin chamber in each arm will have an extra set of ADC's with a wide gate bracketing the normal one so timing errors and tails of earlier pulses should not produce fake quarks.}
journal = {Phys. Scr.; (Sweden)}
volume = {23:4}
place = {Sweden}
year = {1981}
month = {Apr}
}