A PROPOSAL FOR A HADRON-BLIND FAST TRD BASED ON SECONDARY-ELECTRON EMISSION

A novel, fast, hadron-blind imaging TRD is proposed. Traditonal radiat ors are followed by novel, particle-blind photon imaging detectors, co mbining thin CsI photon convertors and fast gaseous electron multiplie rs. The expected performance of the TRD, based on multiple radiator/de tector elements, is simulated, using experimental and theoretical data of the photon detector characteristics. Such TRDs can provide 100 GeV electron detection efficiency above 90% with hadronic background reje ction factors of 10(2) - 10(4). The nanosecond timing, very low occupa ncy and the high rate capability make these devices very competitive t ools for ultrarelativistic electron identification under critical cond itions expected in future particle physics experiments.