Performance of the LHCb RICH photodetectors in a charged particle beam

Journal article

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. © 2007 Elsevier B.V. All rights reserved.

Authors: Adinolfi, M; Rinella, G; Albrecht, E; Ameri, M; Arnaboldi, C

• Publication status: Published
• Journal: NUCLEAR INSTRUMENTS and METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
• Volume: 574
• Issue: 1
• Pages: 39-49
• Publication date: 2007-04-21
• DOI: 10.1016/j.nima.2007.01.100
• ISSN: 0168-9002
• Language: English
• Keywords: hybrid photon detectors; Ring Imaging Cherenkov detectors; LHCb experiment