Construction and Expected Performance of the Hadron Blind Detector for the PHENIX Experiment at RHIC

Details Construction and Expected Performance of the Hadron Blind Detector for the PHENIX Experiment at RHIC Construction and Expected Performance of the Hadron Blind Detector for the PHENIX Experiment at RHIC

2007-01-23

arxiv.org/abs/physics/0701273v1

J.Phys.G34:S701-704,2007; J.Phys.G34:S705-708,2007

Physics

Instrumentation and Detectors

QM2006 proceedings, 4 pages 3 figures

Scientific paper

10.1088/0954-3899/34/8/S77 10.10

A new Hadron Blind Detector (HBD) for electron identification in high density hadron environment has been installed in the PHENIX detector at RHIC in the fall of 2006. The HBD will identify low momentum electron-positron pairs to reduce the combinatorial background in the $e^{+}e^{-}$ mass spectrum, mainly in the low-mass region below 1 GeV/c$^{2}$. The HBD is a windowless proximity-focusing Cherenkov detector with a radiator length of 50 cm, a CsI photocathode and three layers of Gas Electron Multipliers (GEM). The HBD uses pure CF$_{4}$ as a radiator and a detector gas. Construction details and the expected performance of the detector are described.

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