Broad area cathode contact for a photomultiplier tube

Details Broad area cathode contact for a photomultiplier tube Broad area cathode contact for a photomultiplier tube

1981-11-20

1984-05-08

Moore, David K.

Electric lamp and discharge devices

Photosensitive

Photomultiplier

313523, H01J 4000

Patent

active

044477589

ABSTRACT:
A photomultiplier tube comprises an evacuated envelope having a generally cylindrical sidewall with a faceplate closing one end of the envelope. A conductive coating is disposed on a portion of the sidewall adjacent to the faceplate. A photocathode is formed on the faceplate and on a portion of the conductive coating. An electron multiplier assembly including a plurality of electrodes is spaced from the photocathode. A plurality of leads extend from the electrodes to a plurality of terminals in a base attached to the tube. A resilient electrical contact member is connected to a terminal in the base for applying a potential to the photocathode. The electrical contact member has a pair of support tabs at the opposite ends of the member. The tabs are affixed to the multiplier assembly so that the contact member assumes a substantially arcuate shape which contacts and conforms to a large area of the conductive coating on the sidewall of the envelope.

REFERENCES:
patent: 2121636 (1938-06-01), Koller
patent: 2160593 (1939-05-01), Kling
patent: 2755405 (1956-07-01), Wilhelm
patent: 2829292 (1958-04-01), DeVere Krause
patent: 2829293 (1958-04-01), Widmaier
patent: 2880344 (1959-03-01), Stoudenheimer
patent: 3355617 (1967-11-01), Schwartz et al.
patent: 3372967 (1966-07-01), Hughes
patent: 4355258 (1982-10-01), Butterwick

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