Author/Authors :
Nishida، نويسنده , , S. and Adachi، نويسنده , , I. and Hamada، نويسنده , , N. and Hara، نويسنده , , K. and Iijima، نويسنده , , T. and Iwata، نويسنده , , S. and Kakuno، نويسنده , , H. and Kawai، نويسنده , , H. and Korpar، نويسنده , , S. and Kriz^an، نويسنده , , P. and Ogawa، نويسنده , , S. and Pestotnik، نويسنده , , R. and ?antelj، نويسنده , , L. and Seljak، نويسنده , , A. and Sumiyoshi، نويسنده , , T. and Tabata، نويسنده , , M. and Tahirovic، نويسنده , , E. and Yoshida، نويسنده , , K. and Yusa، نويسنده , , Y.، نويسنده ,
Abstract :
The Belle II spectrometer, a follow up of the very successful Belle experiment, is under construction at the SuperKEKB electron–positron collider at KEK in Japan. For the PID system in the forward region of the spectrometer, a proximity focusing ring-imaging Cherenkov (RICH) counter with an aerogel radiator is being developed. The counter will provide a 4σ separation of pions and kaons up to momenta of 4 GeV/c. For the position sensitive photon sensor, a 144-channel Hybrid Avalanche Photo-Detector (HAPD) has been developed with Hamamatsu Photonics K.K. The readout electronics is based on the custom developed ASIC. The design of the components is currently being finalized and part of their mass production have already started. Herein, we report the final design of the counter and a prototype test conducted with test beams at DESY.
Keywords :
Hybrid Avalanche Photo Detector , aerogel , Particle identification , Cherenkov radiation
