The European Physical Journal Special Topics

, Volume 162, Issue 1, pp 251–257 | Cite as

The COMPASS RICH-1 detector upgrade

  • P. Abbon
  • M. Alekseev
  • H. Angerer
  • M. Apollonio
  • R. Birsa
  • P. Bordalo
  • F. Bradamante
  • A. Bressan
  • L. Busso
  • M. Chiosso
  • P. Ciliberti
  • M. L. Colantoni
  • S. Costa
  • S. Dalla Torre
  • T. Dafni
  • E. Delagnes
  • H. Deschamps
  • V. Diaz
  • N. Dibiase
  • V. Duic
  • W. Eyrich
  • D. Faso
  • A. Ferrero
  • M. Finger
  • M. FingerJr.
  • H. Fischer
  • S. Gerassimov
  • M. Giorgi
  • B. Gobbo
  • R. Hagemann
  • D. von Harrach
  • F. H. Heinsius
  • R. Joosten
  • B. Ketzer
  • K. Königsmann
  • V. N. Kolosov
  • 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
  • P. Pagano
  • S. Panebianco
  • D. Panzieri
  • S. Paul
  • G. Pesaro
  • J. Polak
  • P. 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
Article

Abstract

The COMPASS experiment at CERN provides hadron identification in a wide momentum range employing a large size gaseous Ring Imaging CHerenkov detector (RICH). The presence of large uncorrelated background in the COMPASS environment was limiting the efficiency of COMPASS RICH-1 in the very forward regime. A major upgrade of RICH-1 required a new technique for Cherenkov photon detection at count rates of several 106/s per channel in the central detector part, and a read-out system allowing for trigger rates of up to 100 kHz. To cope with these requirements, the photon detectors of the central region have been replaced with a fast photon detection system described here, while, in the peripheral regions, the existing multi-wire proportional chambers with CsI photo-cathodes have been equipped with a new read-out system based on APV preamplifiers and flash ADC chips. The new system consists of multi-anode photomultiplier tubes (MAPMTs) coupled to individual fused silica lens telescopes, and fast read-out electronics based on the MAD4 amplifier-discriminator and the dead-time free F1 TDC chip. The project was completely designed and implemented in less than two years: The upgraded detector is in operation since the 2006 CERN SPS run. We present the photon detection design, constructive aspects and test studies to characterise the single photon response of the MAPMTs coupled to the read-out system as well as the detector performance based on the 2006 data.

Keywords

European Physical Journal Special Topic Photon Detection Trigger Rate Compass Collaboration Cherenkov Photon 

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Copyright information

© EDP Sciences and Springer 2008

Authors and Affiliations

  • P. Abbon
    • 12
  • M. Alekseev
    • 13
  • H. Angerer
    • 9
  • M. Apollonio
    • 14
  • R. Birsa
    • 14
  • P. Bordalo
    • 7
  • F. Bradamante
    • 14
  • A. Bressan
    • 14
  • L. Busso
    • 13
  • M. Chiosso
    • 13
  • P. Ciliberti
    • 14
  • M. L. Colantoni
    • 1
  • S. Costa
    • 13
  • S. Dalla Torre
    • 14
  • T. Dafni
    • 12
  • E. Delagnes
    • 12
  • H. Deschamps
    • 12
  • V. Diaz
    • 14
  • N. Dibiase
    • 13
  • V. Duic
    • 14
  • W. Eyrich
    • 4
  • D. Faso
    • 13
  • A. Ferrero
    • 13
  • M. Finger
    • 10
    • 11
  • M. FingerJr.
    • 10
    • 11
  • H. Fischer
    • 5
  • S. Gerassimov
    • 9
  • M. Giorgi
    • 14
  • B. Gobbo
    • 14
  • R. Hagemann
    • 5
  • D. von Harrach
    • 8
  • F. H. Heinsius
    • 5
  • R. Joosten
    • 2
  • B. Ketzer
    • 9
  • K. Königsmann
    • 5
  • V. N. Kolosov
    • 3
  • I. Konorov
    • 9
  • D. Kramer
    • 6
  • F. Kunne
    • 12
  • A. Lehmann
    • 4
  • S. Levorato
    • 14
  • A. Maggiora
    • 13
  • A. Magnon
    • 12
  • A. Mann
    • 9
  • A. Martin
    • 14
  • G. Menon
    • 14
  • A. Mutter
    • 5
  • O. Nähle
    • 2
  • F. Nerling
    • 5
  • D. Neyret
    • 12
  • P. Pagano
    • 14
  • S. Panebianco
    • 12
  • D. Panzieri
    • 1
  • S. Paul
    • 9
  • G. Pesaro
    • 14
  • J. Polak
    • 6
  • P. Rebourgeard
    • 12
  • F. Robinet
    • 12
  • E. Rocco
    • 14
  • P. Schiavon
    • 14
  • C. Schill
    • 5
  • W. Schröder
    • 4
  • L. Silva
    • 7
  • M. Slunecka
    • 10
    • 11
  • F. Sozzi
    • 14
  • L. Steiger
    • 10
    • 11
  • M. Sulc
    • 6
  • M. Svec
    • 6
  • F. Tessarotto
    • 14
  • A. Teufel
    • 4
  • H. Wollny
    • 5
  1. 1.INFNSezione di Torino and University of East PiemonteAlessandriaItaly
  2. 2.Helmholtz-Institut für Strahlen- und KernphysikUniversität BonnBonnGermany
  3. 3.CERNEuropean Organization for Nuclear ResearchGenevaSwitzerland
  4. 4.Physikalisches InstitutUniversität Erlangen-NürnbergErlangenGermany
  5. 5.Physikalisches InstitutUniversität FreiburgFreiburgGermany
  6. 6.Technical University of LiberecLiberecCzech Republic
  7. 7.LIPLisbonPortugal
  8. 8.Institut für KernphysikUniversität MainzMainzGermany
  9. 9.Physik DepartmentTechnische Universität MünchenGarchingGermany
  10. 10.Charles UniversityPragueCzech Republic
  11. 11.JINRDubnaRussia
  12. 12.CEA Saclay, DSM/DAPNIAGif-sur-YvetteFrance
  13. 13.INFNSezione di Torino and University of TorinoTorinoItaly
  14. 14.INFNSezione di Trieste and University of TriesteTriesteItaly

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