Physics – Instrumentation and Detectors
Scientific paper
2003-07-21
Physics
Instrumentation and Detectors
5 pages, 3 figures Presented at the Fourth International Workshop on Ring Imaging Cherenkov Detectors (RICH 2002), Pylos, Gree
Scientific paper
A Hadron Blind Detector (HBD) is proposed as upgrade of the PHENIX detector at RHIC, BNL. The HBD will allow the measurement of low-mass e+e- pairs from the decay of the light vector mesons rho, omega, phi and the low-mass continuum in Au-Au collisions at energies up to sqrt{s_{NN}}= 200 GeV. From MC simulations and general considerations, the HBD has to identify electrons with very high efficiency (> 90%), double hit recognition better than 90%, moderate pion rejection factor of ~200 and radiation budget of the order of 1% of a radiation length. The first choice under study is a windowless Cherenkov detector, operated with pure CF4, in a special proximity focus configuration with a CsI photocathode and a multistage GEM amplification element.
Aidala Christine
Azmoun B.
Fraenkel Z.
Hemmick T.
Khachaturov B.
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