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Hadron Blind Detector for the PHENIX Experiment at RHIC

A. Milov
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Abstract

The PHENIX collaboration has designed a conceptually new Hadron Blind Detector (HBD) for electron identification in high density hadron environment. The HBD will identify low momentum electron-positron pairs to reduce the combinatorial background in the mass region below 1 GeV/c^2. The HBD shall be installed in PHENIX during the 2007 physics run. The HBD is a windowless proximity focusing Cherenkov detector with a radiator length of 50 cm, CsI photocathode and three layers of Gas Electron Multipliers (GEM) for gas amplification. Pure CF_4 serves both as a radiator and as a detector gas. The radiation budget of the device is less than 3% of a radiation length.

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A. Milov. 2006-09-11. Hadron Blind Detector for the PHENIX Experiment at RHIC. https://doi.org/10.1063/1.2402713

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