Threshold self-powered gamma detector for use as a monitor of po

Details Threshold self-powered gamma detector for use as a monitor of po Threshold self-powered gamma detector for use as a monitor of po

1977-04-04

1978-05-23

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

Semiconductor system

G01T 122

Patent

active

040912884

ABSTRACT:
A self-powered gamma monitor for placement near the core of a nuclear reactor comprises a lead prism surrounded by a coaxial thin nickel sheet, the combination forming a collector. A coaxial polyethylene electron barrier encloses the collector and is separated from the nickel sheet by a vacuum region. The electron barrier is enclosed by a coaxial stainless steel emitter which, in turn, is enclosed within a lead casing. When the detector is placed in a flux of gamma rays, a measure of the current flow in an external circuit between emitter and collector provides a measure of the power level of the reactor.

REFERENCES:
patent: 3400289 (1968-09-01), Anderson
patent: 3603793 (1971-09-01), Warren
patent: 3940627 (1976-02-01), Klar

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