Performance of the LHCb RICH photodetectors in a charged particle beam

M. Adinolfi, G. Aglieri Rinella, E. Albrecht, M. Ameri, C. Arnaboldi, T. Bellunato, J. Bibby, T. Blake, S. Cuneo, J. Dickens, S. Easo, U. Egede, F. Fontanelli, V. Gibson, T. Gys, R. Hallam, N. Harnew, A. Howard, N. Kanaya, S. KatvarsC. Matteuzzi, J. McCarron, G. Mini, F. Muheim, E. Panzeri, M. Patel, G. Pessina, D. Piedigrossi, R. Plackett, M. Sannino, J. Storey, P. Sullivan, S. Topp-Jorgensen, A. Van Lysebetten, G. Vidal-Sitjes, D. Websdale, S. Wotton, K. Wyllie

Research output: Contribution to journalArticleResearchpeer-review

15 Citations (Scopus)


The Ring Imaging Cherenkov detectors of LHCb will use pixel Hybrid Photon Detectors to measure the spatial position of Cherenkov photons. The first six pre-production photon detectors have been tested in a beam, together with prototypes of the on-detector electronics. The tests were performed at CERN using 10 GeV / c pions together with an N2 gas radiator as a source of Cherenkov light. With 1.1 m of radiator, around 10 photoelectrons were detected per track. The single-photon Cherenkov angle resolution was measured to be 1.66 ± 0.03 mrad, which is dominated by the pixelisation of the photon detector in the test-beam set-up. Both numbers agree with expectations.

Original languageEnglish
Pages (from-to)39-49
Number of pages11
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Issue number1
Publication statusPublished - 21 Apr 2007
Externally publishedYes


  • Hybrid Photon Detectors
  • LHCb experiment
  • Ring Imaging Cherenkov detectors

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