DocumentCode
835555
Title
Development and Performance of a Large-Scale Multilayer Proportional Counter System Used in the External Particle Identifier (EPI) at CERN
Author
Lazeyras, P. ; Lehraus, I. ; Matthewson, R. ; Tejessy, W.
Author_Institution
CERN, Geneva, Switzerland
Volume
26
Issue
1
fYear
1979
Firstpage
89
Lastpage
104
Abstract
A matrix of 4096 gas proportional counters of 6 × 6 cm2 cross section and 1 m height arranged in 128 layers of 32 cells each is used for identification of fast pions, kaons and protons emerging from hadron interactions in the 3.7 m bubble chamber (BEBC). Particle separation in the momentum range up to at least 70 GeV/c is achieved by ionization sampling in the region of the relativistic rise. Resolution in dE/dx of 6% FWHM (2.5% RMS) was reached and maintained over extended running periods. The relativistic rise was measured in the momentum range of 20-110 GeV/c. The results of the EPI tests are used in analysis of certain practical application limits of the dE/dx sampling method.
Keywords
Counting circuits; Detectors; Intersymbol interference; Ionization; Large-scale systems; Loss measurement; Maximum likelihood detection; Mesons; Nonhomogeneous media; Sampling methods;
fLanguage
English
Journal_Title
Nuclear Science, IEEE Transactions on
Publisher
ieee
ISSN
0018-9499
Type
jour
DOI
10.1109/TNS.1979.4329618
Filename
4329618
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