Author/Authors :
Kri?an، نويسنده , , P. and Adachi، نويسنده , , I. and Fratina، نويسنده , , Mary S. and Fukushima، نويسنده , , S. and Gori?ek، نويسنده , , A. and Iijima، نويسنده , , T. and Kawai، نويسنده , , H. and Konishi، نويسنده , , H. and Korpar، نويسنده , , S. and Kozakai، نويسنده , , Y. and Matsumoto، نويسنده , , T. and Mazuka، نويسنده , , Y. and Nishida، نويسنده , , S. and Ogawa، نويسنده , , S. and Ohtake، نويسنده , , S. and Pestotnik، نويسنده , , R. and Sai، 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 π 2 beam. The single photon resolution obtained in the tests (typically around 14 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 :
Belle , Particle identification , H8500 flat panel PMT , Proximity focusing , Ring imaging Cherenkov counter , aerogel
