Electron discharge device having a thermionic electron control p

Details Electron discharge device having a thermionic electron control p Electron discharge device having a thermionic electron control p

1984-03-19

1986-05-13

DeMeo, Palmer C.

Electric lamp and discharge devices

Photosensitive

Photomultiplier

313536, 313537, H01J 4004, H01J 4306

Patent

active

045889228

ABSTRACT:
An improved electron discharge device comprises an evacuated envelope having therein a photoemissive cathode for providing photoelectrons in response to radiation incident thereon, an electron multiplier, including a primary dynode spaced from the cathode, and a focusing assembly disposed between the cathode and the multiplier. A thermionic electron control plate is disposed between the focusing assembly and the multiplier to prevent thermionic electrons from the focusing assembly from impinging on the primary dynode, while permitting the passage of photoelectrons to the primary dynode. The control plate overlies the primary dynode and is contiguous therewith.

REFERENCES:
patent: 2231698 (1941-02-01), Zworykin et al.
patent: 2396023 (1946-03-01), Schantz
patent: 2796547 (1957-06-01), Nevin
patent: 2868994 (1959-01-01), Anderson
patent: 2895068 (1959-07-01), Rodda
patent: 2952499 (1960-09-01), Carson
patent: 3409778 (1968-11-01), Eberhardt
patent: 4079282 (1978-03-01), Faulkner et al.
patent: 4376246 (1983-03-01), Butterwick

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