Radiation dosimeter

Details Radiation dosimeter Radiation dosimeter

1980-01-21

1981-11-17

Smith, Alfred E.

Radiant energy

Invisible radiant energy responsive electric signalling

Semiconductor system

340600, G01T 122, G08B 1712

Patent

active

043013678

ABSTRACT:
A portable solid-state radiation dosimeter provides either a cumulative reading or time base reading and includes means for generating an alarm condition when preset radiation levels are reached or exceeded. The dosimeter preferably employs a cadmium telluride crystal biased to provide a count signal corresponding to the level of radiation. The circuitry for processing the crystal signal includes a field effect transistor which provides pre-amplification, one or more stages of main amplification including noise threshold setting, and a frequency to voltage converter for essentially counting radiation pulses. One output from the converter may be an alarm signal that is tripped when a predetermined voltage is reached. Also, a digital reading of radiation count may be provided.

REFERENCES:
patent: 3999071 (1976-12-01), Siffert et al.
patent: 4197461 (1980-04-01), Umbarger et al.

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