K. Deiters et al., COMPARISON OF PHOTOMULTIPLIER AND AVALANCHE PHOTODIODE READOUT OF PBWO4, Nuclear instruments & methods in physics research. Section A, Accelerators, spectrometers, detectors and associated equipment, 387(1-2), 1997, pp. 211-213
At PSI a proton beam with 84 MeV kinetic energy is used in order to in
vestigate the uniformity of light collection and the light yield with
avalanche photodiode (APD) and photomultiplier (PMT) readout. New type
s of Hamamatsu APDs have been coupled to PbWO4 scintillators. The obta
ined results are compared with the PMT response. This contribution is
part of the CMS ECAL group research.