Author/Authors :
Fraenkel، نويسنده , , Z. and Kozlov، نويسنده , , A. and Naglis، نويسنده , , M. and Ravinovich، نويسنده , , I. I. Shekhtman، نويسنده , , L. and Tserruya، نويسنده , , I. and Azmoun، نويسنده , , Marcin B. and Woody، نويسنده , , C. and Sawada، نويسنده , , S. and Yokkaichi، نويسنده , , S. and Milov، نويسنده , , A. and Gunji، نويسنده , , T. and Hamagaki، نويسنده , , H. and Inuzuka، نويسنده , , M. and Isobe، نويسنده , , T. and Morino، نويسنده , , Y. and Oda، نويسنده , , S.X. and Ozawa، نويسنده , , K. and Saito، نويسنده , , S. and Sakaguchi، نويسنده , , T. and Yamaguchi، نويسنده , , Y.، نويسنده ,
Abstract :
A Hadron Blind Detector (HBD) is being developed for the PHENIX experiment at RHIC. It consists of a Cherenkov radiator operated with pure CF 4 directly coupled in a windowless configuration to a triple-GEM detector element with a CsI photocathode and pad readout. The HBD operates in the bandwidth 6–11.5 eV (110–200 nm). We studied the detector response to minimum ionizing particles and to electrons. We present measurements of the CsI quantum efficiency, which are in very good agreement with previously published results over the bandwidth 6–8.3 eV and extend them up to 10.3 eV. Discharge probability and aging studies of the GEMs and the CsI photocathode in pure CF 4 are presented.
Keywords :
HBD , GEM , CsI photocathode , UV-photon detector , CF 4
