Photomultiplier tube having directional alkali metal vapor evapo

Details Photomultiplier tube having directional alkali metal vapor evapo Photomultiplier tube having directional alkali metal vapor evapo

1981-03-04

1982-06-01

Segal, Robert

Electric lamp and discharge devices

Geiger-mueller type

313181, H01J 4016, H01J 4002

Patent

active

043330312

ABSTRACT:
A photoelectric tube, preferably a photomultiplier tube comprises a photoemissive cathode deposited on the inner faceplate of the tube envelope and a dynode assembly mounted within the envelope. The tube includes a generator containing an alkali metal source for deposition of alkali metal onto the cathode surface. The generator has means for directing the alkali metal vapors substantially toward the cathode surface and for preventing the alkali metal vapors from substantially depositing on the dynode assembly.

REFERENCES:
patent: 2275864 (1942-03-01), Record
patent: 2676282 (1954-03-01), Polkosky
patent: 2829293 (1958-04-01), Widmaier
patent: 3372967 (1968-03-01), Hughes
patent: 3658400 (1972-04-01), Helvy
patent: 3719433 (1973-03-01), Rabusin
patent: 3913999 (1975-10-01), Clarke
patent: 3945949 (1976-03-01), Vucht et al.

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