A prototype HBD for PHENIX

R.P. Pisani,T.K. Hemmick,H. Chung,S.C. Johnson,T. Piazza,T. Vongpaseuth,M. Akopyan

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment（1999）

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摘要

We constructed and tested a threshold Cherenkov detector (inspired by the conceptual design of Giomataris and Charpak (Nucl. Instr. and Meth. A 310 (1991)589) consisting of a gas radiator followed by a photosensitive wire chamber using a solid CsI photocathode. The detector was operated with C2F6 radiator gas and a 95%He+5%CH4 mixture for the avalanche gas. At 95% electron efficiency, the pion efficiency was 1333,1150, and 1100 for each of the lengths listed above.

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conceptual design

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