The development and the study of R5900-00-M64 for scintillating/optical fiber readout

In High Energy Physics (HEP) experiments, scintillating or optical fibers are used for tracking detectors and sampling calorimeters. As a recent trend, the size of detectors are getting large in accordance with increase of particle energy. It leads to enlargement of readout channels. In addition, the count rate of signals is also increased. In some cases, gas detectors can't be used with a high count rate signal. Multi channel photodetectors with low channel cost are getting necessary in those conditions. Hamamatsu has developed the R5900-00-M64 as one such photodetector to satisfy the above requirement. R5900-00-M64 is a 64 channel multi anode PMT. It uses metal channel dynodes and a 28/spl times/28 mm metal package. Its basic performance are studied and reported in this paper.