Radiant energy – Invisible radiant energy responsive electric signalling – Semiconductor system
Patent
1981-11-13
1984-11-20
Smith, Alfred E.
Radiant energy
Invisible radiant energy responsive electric signalling
Semiconductor system
G01T 124
Patent
active
044840764
ABSTRACT:
A direct reading dosimeter having a range such that it can be used by personnel workers in the medical, nuclear and industrial fields, and provides and indication of dose rate as well as total received dosage. The dosimeter uses a semiconductor sensor of MOS or bipolar transistor or MOS capacitor form which traps positive charge under the influence of ionizing radiation. A current is applied to the sensor substrate, the voltage across a portion of the substrate is sensed, differentiated and displayed. The dosimeter circuit can be integrated and packaged in a wrist watchcase, in a probe, or other convenient form.
REFERENCES:
patent: 4320393 (1982-03-01), Engdahl
Ciarlo, "MOSFET Detector Evaluation", IEEE Trans. Nucl. Sci., 21 (1), 2-74, pp. 390-394.
Kalibjian, "Time-Resolved X-Ray Detection Using MOS-C Detectors", IEEE Trans. Nucl. Sci., 19 (3), 6-72, pp. 339-345.
August, "Estimating and Reducing Errors in MOS Dosimeters Caused by Exposure to Different Radiations", IEEE Trans. Nucl. Sci., 29 (6), 12-82, pp. 2000-2003.
Adams, "The Development of an MOS Dosimetry Unit for Use in Space", IEEE Trans. Nucl. Sci., 25 (6), 12-78, pp. 1607-1612.
Canadian Astronautics Limited
Fields Carolyn E.
Pascal Edward E.
Smith Alfred E.
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