Recent Photomultiplier Developments at RCA

Data on transit time and rise time for numerous types of photomultipliers are presented. Two new photomultipliers designed to provide superior time resolution are discussed. The properties of existing types designed for energy spectroscopy are reviewed. New types designed to reduce dark noise due to radioactive contaminants, dark current, and leakage are described and performance data presented. Some of the advantages of the K2CsSb photocathode are shown. The development of photomultipliers for severe environments is reviewed. Two new families of tubes for this service are described.