Author/Authors :
Pestotnik، نويسنده , , R and Adachi، نويسنده , , I and Fratina، نويسنده , , S and Iijima، نويسنده , , T and Ishibashi، نويسنده , , R and Kawai، نويسنده , , H and Korpar، نويسنده , , S and Kri?an، نويسنده , , P and Ogava، نويسنده , , S and Matsumoto، نويسنده , , T and Saitoh، نويسنده , , S and Seki، نويسنده , , T and Stari?، نويسنده , , M and Stanovnik، نويسنده , , A and Sumiyoshi، نويسنده , , T and Suzuki، نويسنده , , K and Tabata، نويسنده , , T and Uchid، نويسنده ,
Abstract :
Using aerogel as radiator and 64-channel flat panel multi-anode PMTs (Hamamatsu H8500) for photon detection, a proximity focusing Cherenkov ring imaging detector has been constructed and tested in the KEK π2 beam. The single photon resolution obtained in the tests (typically around 11 mrad) is well approximated by estimates of contributions from pixel size and emission point uncertainty. The number of detected photons per Cherenkov ring, typically about 6 for a 2 cm thick aerogel radiator tile, is in good agreement with estimates based on aerogel and detector characteristics. The detector allows a very efficient separation of kaons and pions at 4 GeV/c.
Keywords :
Flat panel PMT , Proximity focusing , Belle , Ring imaging Cherenkov counter , Particle identification , aerogel
