Performance of the LHCb RICH photodetectors in a charged particle beam

✍ Scribed by 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. Katvars; C. 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

• Publisher: Elsevier Science
• Year: 2007
• Tongue: English
• Weight: 458 KB
• Volume: 574
• Category: Article
• ISSN: 0168-9002
• DOI: 10.1016/j.nima.2007.01.100

✦ Synopsis

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 N 2 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 AE 0:03 mrad, which is dominated by the pixelisation of the photon detector in the test-beam set-up. Both numbers agree with expectations.