Speaker
Description
Now the ASHIPH (Aerogel, SHifter, PHotomultiplier) Cherenkov counters are considered as a particle identification system for the detector on various future colliding beam experiments. Cherenkov light from particle in aerogel is collected by wavelength shifter (WLS) placed in the middle of the counter and re-emitted transported by WLS like a lightguide to photomultiplier (PMT). Today it is possible to use more efficient silicon photomultipliers (SiPMs) as photon detectors (PDE~40%). We have developed prototypes of ASHIPH-SiPMs counters of small (260x80x36 мм^3) and large (500x200x60 мм^3) sizes. Aerogels with refractive indexes of 1.05 and 1.03 were used inside the prototypes, which can allows separation of pions and kaons up to 2.5 GeV with high quality. The both prototypes of the ASHIPH-SiPM counters were investigated on a test electron beam. The results of measuring average number of photoelectrons per relativistic particle, inhomogeneity of the light collection in counter and the quality of particle separation will be presented.
