Author/Authors :
Pestotnik، نويسنده , , David R. and Adachi، نويسنده , , I. and Hara، نويسنده , , K. and Higuchi، نويسنده , , M. and Iijima، نويسنده , , T. and Iwata، نويسنده , , S. and Kakuno، نويسنده , , H. and Kawai، نويسنده , , H. and Kawasaki، نويسنده , , T. and Korpar، نويسنده , , S. and Krizan، نويسنده , , P. and Kumita، نويسنده , , T. and Mori، نويسنده , , W. and Nishida، نويسنده , , S. and Ogawa، نويسنده , , S. and ?antelj، نويسنده , , L. and Sakashita، نويسنده , , Y. and Seljak، نويسنده , , A. and Sumiyoshi، نويسنده , , T. and Tabata، نويسنده , , M. and Takagaki، نويسنده , , H. and Yusa، نويسنده , , Y. and Verheyden، نويسنده , , R.، نويسنده ,
Abstract :
For the Belle II spectrometer we are preparing a proximity focusing RICH with aerogel as the radiator. It will be positioned in the forward direction of the spectrometer in the small space between the drift chamber and the electromagnetic calorimeter inside a strong magnetic field of 1.5 T. The Hybrid Avalanche Photo Diode used as a photo sensor, is able to detect single photons with a high efficiency, can operate in the magnetic field and is resistant to the expected neutron and gamma fluxes in the detector. By detecting more than 11 photons per incident 4 GeV/c pion, with 15 mrad single photon Cherenkov angle resolution, the designed aerogel RICH should enable an efficient separation of kaons from pions in the wide range of particle momenta from 0.5 GeV/c up to 4 GeV/c.
