A highly integrated low-cost readout system for the COMPASS RICH-1 detector

P. Abbon, M. Alekseev, H. Angerer, M. Apollonio, R. Birsa, R. Bordalo, F. Bradamante, A. Bressan, L. Busso, M. Chiosso, R. Ciliberti, M. L. Colantoni, S. Costa, T. Dafni, S. Dalla Torre, E. Delagnes, H. Deschamps, V. Diaz, N. Dibiase, V. DuicW. Eyrich, D. Faso, A. Ferrero, M. Finger, M. Finger, H. Fischer, M. Georgi, S. Gerassimov, B. Gobbo, R. Hagemann, D. Von Harrach, F. H. Heinsius, R. Joosten, B. Ketzer, V. N. Kolosov, K. Königsmann, I. Konorov, D. Kramer, F. Kunne, A. Lehmann, S. Levorato, A. Maggiora, A. Magnon, A. Mann, A. Martin, G. Menon, A. Mutter, O. Nähle, F. Nerling, D. Neyret, R. Pagano, S. Panebianco, D. Panzieri, S. Paul, G. Pesaro, C. Pizzolotto, J. Polak, R. Rebourgeard, F. Robinet, E. Rocco, P. Schiavon, C. Schill, W. Schröder, L. Silva, M. Slunecka, F. Sozzi, L. Steiger, M. Sulc, M. Svec, F. Tessarotto, A. Teufel, H. Wollny

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

Particle identification at high multiplicities is a key feature of the COMPASS experiment at CERN's SPS. Hadrons up to 50 GeV/c are identified by a RICH detector with a large horizontal and vertical acceptance of ±250 mrad and ±180 mrad, respectively. The central region of the photon detector is equipped with multi-anode photomultiplier tubes, the remaining 75% of the total active area are covered by MWPCs with CsI photocathodes. In order to improve the performance of the detector at very high beam intensities, more than 62000 channels of a new analog readout system of file MWPCs, based on the APV25 chip, were developed and installed in 2006. The new system features good single photon detection efficiency due to its low noise, negligible dead time at trigger rates up to 50 kHz, and low cost. In addition, sampling of the MWPC signal allows us to measure the signal time with a resolution of about 30 ns or better. The architecture of the new readout system as well as the performance results of the RICH-1 detector in the outer region during 2006 COMPASS run will be discussed.

Original languageEnglish
Title of host publication2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC
Pages1762-1765
Number of pages4
DOIs
StatePublished - 2007
Event2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC - Honolulu, HI, United States
Duration: 27 Oct 20073 Nov 2007

Publication series

NameIEEE Nuclear Science Symposium Conference Record
Volume3
ISSN (Print)1095-7863

Conference

Conference2007 IEEE Nuclear Science Symposium and Medical Imaging Conference, NSS-MIC
Country/TerritoryUnited States
CityHonolulu, HI
Period27/10/073/11/07

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