Novel Cherenkov photon detectors
نویسنده
چکیده
Gaseous detectors using multiple gas electron multiplier (GEM) electrodes permit to attain large amplification factors with a strong suppression of photon and ion-mediated feedback. With the first GEM in a cascade coated with a photosensitive layer, they provide efficient and fast single photon detection, with excellent position resolution. General performances of CsI-coated multi-GEM detectors are described, as well as a promising method of signal readout, the so-called hexaboard, a matrix of interconnected pads that permits to achieve ambiguity-free reconstruction of multiphoton events, a major requirement for RICH applications. r 2005 Elsevier B.V. All rights reserved.
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