Circuitry for use with an ionizing-radiation detector

Details Circuitry for use with an ionizing-radiation detector Circuitry for use with an ionizing-radiation detector

1975-04-02

1976-10-05

Borchelt, Archie R.

Radiant energy

Invisible radiant energy responsive electric signalling

Including a radiant energy responsive gas discharge device

250336, 250375, G01T 118

Patent

active

039846903

ABSTRACT:
An improved system of circuitry for use in combination with an ionizing-radiation detector over a wide range of radiation levels includes a current-to-frequency converter together with a digital data processor for respectively producing and measuring a pulse repetition frequency which is proportional to the output current of the ionizing-radiation detector, a dc-to-dc converter for providing closely regulated operating voltages from a rechargeable battery and a bias supply for providing high voltage to the ionization chamber. The ionizing-radiation detector operating as a part of this system produces a signal responsive to the level of ionizing radiation in the vicinity of the detector, and this signal is converted into a pulse frequency which will vary in direct proportion to such level of ionizing-radiation. The data processor, by counting the number of pulses from the converter over a selected integration interval, provides a digital indication of radiation dose rate, and by accumulating the total of all such pulses provides a digital indication of total integrated dose. Ordinary frequency-to-voltage conversion devices or digital display techniques can be used as a means for providing audible and visible indications of dose and dose-rate levels.

REFERENCES:
patent: 3683189 (1972-08-01), Garrett
patent: 3787668 (1974-01-01), Currie et al.
patent: 3875410 (1975-04-01), Luger

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