Author/Authors :
Aidala، نويسنده , , C. and Azmoun، نويسنده , , B. and Fraenkel، نويسنده , , Z. and Hemmick، نويسنده , , T. and Khachaturov، نويسنده , , B. and Kozlov، نويسنده , , A. and Milov، نويسنده , , A. and Ravinovich، نويسنده , , I. and Tserruya، نويسنده , , I. and Stoll، نويسنده , , S. and Woody، نويسنده , , C. and Zhou، نويسنده , , S.، نويسنده ,
Abstract :
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 ρ,ω,φ and the low-mass continuum- in Au–Au collisions at sNN=200 GeV. From general considerations, the HBD has to identify electrons with a high efficiency (>90%) and with a double hit resolution better than 90%, it must have a pion rejection factor of at least 200 and a radiation budget of the order of 1% of a radiation length. The choice that emerges is a windowless Cherenkov detector, operated with a CF4 based gas mixture in a special proximity focus configuration with a CsI cathode evaporated on GEMs.
Keywords :
Particle detection , Hadron Blind Detector , Gas electron multipliers , CF4 , CsI photocathode
