Development of medium and small size photomultipliers for experiments in neytrino physics
A number of small-size photomultipliers have been developed by collaboration of INR RAS and MELZ-FEU for large-scale astroparticle physics experiments in particular for neutrino, gamma-astronomy and cosmic ray physics experiments. The developed photomultipliers are of different sizes and optimized for use in Cherenkov and scintillation detectors. The photomultipliers are of different sizes and shapes. The largest photomultipliers have 3 inches photocathodes – hemispherical and flat. We present also results of extensive studies of parameters of developed photomultipliers.