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Titolo:
THE CERES RICH DETECTOR SYSTEM
Autore:
BAUR R; BRESKIN A; CHECHIK R; DREES A; FASCHINGBAUER U; FISCHER P; FRAENKEL Z; GLASS J; GLASSEL P; DELOSHEROS CP; IRMSCHER D; MANNER R; PFEIFFER A; SCHON A; SCHUKRAFT J; SCHWICK C; SHOR A; SPECHT HJ; STEINER V; TAPPROGGE S; TELZUR G; TSERRUYA I; ULLRICH T; WURM JP;
Indirizzi:
UNIV HEIDELBERG W-6900 HEIDELBERG GERMANY UNIV HEIDELBERG W-6900 HEIDELBERG GERMANY CERN CH-1211 GENEVA 23 SWITZERLAND WEIZMANN INST SCI IL-76100 REHOVOT ISRAEL MAX PLANCK INST NUCL PHYS W-6900 HEIDELBERG 1 GERMANY
Titolo Testata:
Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment
fascicolo: 1, volume: 343, anno: 1994,
pagine: 87 - 98
SICI:
0168-9002(1994)343:1<87:TCRDS>2.0.ZU;2-P
Fonte:
ISI
Lingua:
ENG
Soggetto:
SILICON DRIFT DETECTOR; TMAE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
28
Recensione:
Indirizzi per estratti:
Citazione:
R. Baur et al., "THE CERES RICH DETECTOR SYSTEM", Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 343(1), 1994, pp. 87-98

Abstract

We describe the two RICH detectors of the CERES electron pair spectrometer at the CERN SPS which are used for electron identification and, in conjunction with a novel silicon drift detector, for tracking in pp, pA and AA collisions. The RICH detectors are operated at a high gamma(th) congruent-to = 32 (CH4 at 1 atm.) and are thus rather insensitive to hadrons. The UV-detectors are multistep counters with a multiwirechamber as the last stage. They are operated at gains of 2-4 x 10(5) using a mixture of He + 6% C2H6 (or CH4)+TMAE. The two UV-detectors are equipped with 53800 (48400) square pads. The front end electronics consists of modules with 256 (121) channels, based on a 64-channel charge-sensitive preamplifier VLSI chip. The total readout time is 280 (1600) mus per event. Subsets of the pad data are used as input to a fasttrigger processor selecting events with at least two separated electron rings. The trigger achieved an enrichment factor of approximately 100 in proton-induced interactions, and a factor of approximately 3 in S-32-Au collisions. The RICH detectors perform very close to their design values. We observe clean Cherenkov rings with an average number of11.2 (12.5) photons/ring. This is consistent with the calculated value N0 = 131 (75) cm-1 within the systematical error of about 10%. The spatial resolutions of 1.0 and 0.8 mrad (rms) for individual photons are dominated by chromatic aberration and in very good agreement with theoretical expectations.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/07/20 alle ore 04:36:30