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Proceedings Paper

Small-sized gamma-ray probe operating under high fluxes, incorporating a radiation-resistant silicon detector
Author(s): Anne Kazandjian; Vincent Prat; Herve Simon
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Paper Abstract

In several fields of the nuclear industry, high fluxes of gamma radiations have to be measured. The small size of semiconductor detectors would be a good approach; however, in general degraded by the radiations. To overcome these difficulties, highly radiation-resistant silicon detectors have been developed for the measurements of high fluxes of gamma-rays, as encountered for example during in situ measurements in reactors. The detector is mounted in a waterproof 8.0 mm diameter probe, incorporating also all the electronics. The system can operate in two modes: either as counter of individual pulses generated by the radiations, or direct measurement of the induced d.c. current. In the first situation, the sensor operates as photodiode, whereas in the second case, photovoltaics mode is selected, i.e. without any applied bias voltage. When operating in the counter mode, a linear response over eight orders of magnitude of the flux can be measured, in the photovoltaics mode, the dark current limits the lower flux to values of about 5- 10.10-2 Gyh-1.

Paper Details

Date Published: 19 October 1999
PDF: 6 pages
Proc. SPIE 3768, Hard X-Ray, Gamma-Ray, and Neutron Detector Physics, (19 October 1999); doi: 10.1117/12.366607
Show Author Affiliations
Anne Kazandjian, EURORAD II-VI (France)
Vincent Prat, EURORAD II-VI (France)
Herve Simon, EURORAD II-VI (France)

Published in SPIE Proceedings Vol. 3768:
Hard X-Ray, Gamma-Ray, and Neutron Detector Physics
Ralph B. James; Richard C. Schirato, Editor(s)

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