A Review of 2oth Century Photomultipliers

The work at 20th Century has been directed primarily at production of replacement units for photomultiplier types presently being produced in the United Kingdom. The tube type selected for study has been the venetian-blind type. A simplified dynode structure made of a single sheet of metal has been developed. Experiments have been conducted on the light utilization by a transparent cathode and results are presented. The collection characteristics of dynodes also have been investigated and the results are presented. Some general principles in tube design are outlined.