Proposal for a Hadron Blind Detector for PHENIX

Details Proposal for a Hadron Blind Detector for PHENIX Proposal for a Hadron Blind Detector for PHENIX

2003-07-21

arxiv.org/abs/physics/0307101v1

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.

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