Fast photon detection for the COMPASS RICH detector

Details Fast photon detection for the COMPASS RICH detector Fast photon detection for the COMPASS RICH detector

2006-11-14

arxiv.org/abs/physics/0611129v1

Nucl.Phys.Proc.Suppl.172:75-78,2007

Physics

Instrumentation and Detectors

Proceeding of the IPRD06 conference (Siena, Okt. 06)

Scientific paper

10.1016/j.nuclphysbps.2007.07.00

The COMPASS experiment at the SPS accelerator at CERN uses a large scale Ring Imaging CHerenkov detector (RICH) to identify pions, kaons and protons in a wide momentum range. For the data taking in 2006, the COMPASS RICH has been upgraded in the central photon detection area (25% of the surface) with a new technology to detect Cherenkov photons at very high count rates of several 10^6 per second and channel and a new dead-time free read-out system, which allows trigger rates up to 100 kHz. The Cherenkov photons are detected by an array of 576 visible and ultra-violet sensitive multi-anode photomultipliers with 16 channels each. The upgraded detector showed an excellent performance during the 2006 data taking.

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