Studies of Proximity Focusing RICH with an aerogel radiator using Flat-panel multi-anode PMTs (Hamamatsu H8500)

T. Matsumoto; S. Korpar; I. Adachi; S. Fratina; T. Iijima; R. Ishibashi; H. Kawai; P. Krizan; S. Ogawa; R. Pestotnik; S. Saitoh; T. Seki; T. Sumiyoshi; K. Suzuki; T. Tabata; Y. Uchida; Y. Unno

doi:10.1016/j.nima.2003.11.384

arXiv · physics/0309032

Studies of Proximity Focusing RICH with an aerogel radiator using Flat-panel multi-anode PMTs (Hamamatsu H8500)

T. Matsumoto·S. Korpar·I. Adachi·S. Fratina·T. Iijima·R. Ishibashi·H. Kawai·P. Krizan·S. Ogawa·R. Pestotnik·S. Saitoh·T. Seki·T. Sumiyoshi·K. Suzuki·T. Tabata·Y. Uchida·Y. Unno

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Abstract

A proximity focusing ring imaging Cherenkov detector using aerogel as the radiator has been studied for an upgrade of the Belle detector at the KEK-B-factory. We constructed a prototype Cherenkov counter using a 4 x 4 array of 64-channel flat-panel multi-anode PMTs (Hamamatsu H8500) with a large effective area. The aerogel samples were made with a new technique to obtain a higher transmission length at a high refractive index (n=1.05). Multi-channel PMTs are read-out with analog memory chips. The detector was tested at the KEK-PS pi2 beam line in November, 2002. To evaluate systematically the performance of the detector, tests were carried out with various aerogel samples using pion beams with momenta between 0.5 GeV/c and 4 GeV/c. The typical angular resolution was around 14 mrad, and the average number of detected photoelectrons was around 6. We expect that pions and kaons can be separated at a 4 sigma level at 4 GeV/c.

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T. Matsumoto, S. Korpar, I. Adachi, S. Fratina, T. Iijima, R. Ishibashi, H. Kawai, P. Krizan, S. Ogawa, R. Pestotnik, S. Saitoh, T. Seki, T. Sumiyoshi, K. Suzuki, T. Tabata, Y. Uchida, Y. Unno. 2003-11-04. Studies of Proximity Focusing RICH with an aerogel radiator using Flat-panel multi-anode PMTs (Hamamatsu H8500). https://doi.org/10.1016/j.nima.2003.11.384

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