Recent Development of Photomultiplier Tubes for Nuclear and Medical Applications

New type of photomultiplier tubes (PMTs) have been developed for the applications to high energy physics experiments, medical instruments and biophysics experiments. Remarkable features of these PMTs are fast time response and gating function, immunity to the magnetic field, position sensitivity, good pulse height resolution and so on. The performances and the test results of these PMTs are discussed in this paper.