Personal dosimeter having a volume of gas atop an integrated cir

Details Personal dosimeter having a volume of gas atop an integrated cir Personal dosimeter having a volume of gas atop an integrated cir

1987-01-27

1988-09-06

Howell, Janice A.

Radiant energy

Invisible radiant energy responsive electric signalling

Including a radiant energy responsive gas discharge device

25037001, 250386, 250388, 250389, 357 29, G01T 102, G01T 1185, G01T 124

Patent

active

047695471

ABSTRACT:
A dosimeter that includes tissue equivalent bubbles of plastic defining volumes of gas to be ionized by radiation. One or more integrated circuits (ICs) are disposed below the volumes of gas and a collecting electrode on the IC is in direct contact with the gas. Circuitry for generating an electric field within the volume of gas moves the ions therein to the collecting electrode. The collecting electrode is part of an amplifying circuit disposed within the IC. The output from the amplifier is representative of the collected ions and therefore representative of the radiation. The signal from the amplifier is sent to an interface which conditions, buffers and stores the signal. The radiation dose and dose rate are computed in the interface. A communications section transfers that data from the dosimeter upon receipt of an externally generated data transfer command. A separate calibration and display unit calibrates the dosimeter by controlling the conditioning of the signal.

REFERENCES:
patent: 4680471 (1987-07-01), Morris et al.
A. Arbel, J. Booz, K. D. Muller, H. Neuhauss, "Development of Portable Microdosimetric Radiation Protection Monitor Covering a Dynamic Range of 120 dB Above Noise"; IEEE Transactions on Nuclear Science, vol. NS-31, No. 1 (Feb. 1984), pp. 691-696.
M. A. Wolf, D. A. Waechter, C. J. Umbarger, "A New Tiny Computerized Radiation Dosimeter"; IEEE Transactions on Nuclear Science, vol. NS-29, No. 1 (Feb. 1982), pp. 773-774.
Robert L. Dixon and Kenneth E. Ekstrand, "A Silicon Diode Dosimeter with a Memory--An Alternative to Mailed TLD"; Nuclear Instruments and Methods, vol. 175 (1980), pp. 112-114.

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