Study of 144-channel multi-anode hybrid avalanche photo-detector for the Belle RICH counter

摘要

IPNS, High Energy Accelerator Research Organization (KEK), Tsukuba, Japan;Jozef Stefan Institute, Ljubljana, Slovenia;Department of Physics, Nagoya University, Nagoya, Japan;Department of Physics, Nagoya University, Nagoya, Japan;Department of Physics, Chiba University, Chiba, Japan;Department of Physics, Chiba University, Chiba, Japan;Jozef Stefan Institute, Ljubljana, Slovenia,Faculty of Chemistry and Chemical Engineering, University of Maribor, Slovenia;Jozef Stefan Institute, Ljubljana, Slovenia,Faculty of Mathematics and Physics, University of Ljubljana, Slovenia;Department of Physics, Tokyo Metropolitan University, Hachio-ji, Japan;Department of Physics, Tokyo Metropolitan University, Hachio-ji, Japan;Department of Physics, Tokyo Institute of Science, Noda, Japan;IPNS, High Energy Accelerator Research Organization (KEK), Tsukuba, Japan;Department of Physics, Tokyo Metropolitan University, Hachio-ji, Japan;Department of Physics, Toho University, Funabashi, Japan;Jozef Stefan Institute, Ljubljana, Slovenia;Department of Physics, Toho University, Funabashi, Japan;Department of Physics, Nagoya University, Nagoya, Japan;Department of Physics, Tokyo Metropolitan University, Hachio-ji, Japan;Department of Physics, Chiba University, Chiba, Japan;Department of Physics, Tokyo Metropolitan University, Hachio-ji, Japan;IPNS, High Energy Accelerator Research Organization (KEK), Tsukuba, Japan;%A new hybrid avalanche photo-detector has been developed for the Belle RICH counter. The basic features of this device were examined with and without a magnetic field. By constructing a RICH prototype counter using 6 photo-detectors, we carried out a test beam experiment to confirm the performance. We obtained a single photon Cherenkov angle resolution of 12.8 mrad with 4.6 photo-electrons in our experimental setup, demonstrating that A σπ/K separation at 4 GeV/c was achieved.