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arXiv · 2001.10224

Second generation of portable gamma camera based on Caliste CdTe hybrid technology

Daniel MAIER·Claire BLONDEL·Cyrille DELISLE·Olivier LIMOUSIN·Jerome MARTIGNAC·Aline MEURIS·Francois VISTICOT·Geoffrey DANIEL·Pierre-Anne BAUSSON·Olivier GEVIN·Guillaume AMOYAL·Frederick CARREL·Vincent SCHOEPFF·Charly MAHE·Fabrice SOUFFLET·Marie-Cecile VASSAL
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Abstract

In the framework of a national funded program for nuclear safety, a first prototype of portable gamma camera was built and tested. It integrates a Caliste-HD CdTe-hybrid detector designed for space X-ray astronomy coupled with a new system-on-chip based acquisition system (FPGA and ARM microprocessor) and thermo-electrical coolers for a use at room temperature. The complete gamma part of the camera fits in a volume of 15 x 15 x 40 cm^3 for a mass lower than 1 kg and a power consumption lower than 10 W. Localization and spectro-identification of radionuclides in a contaminated scene were demonstrated during several test campaigns. A new generation of system is under development taking into account feedback experience from in-situ measurements and integrating a new generation of sensor cost-optimized by industrial applications called Caliste-O. Caliste-O holds a 16 x 16 pixel detector of 14 x 14 mm^2 and 2 mm thick with 8 full-custom front-end IDeF-X HD ASICs. Two prototypes were fabricated and tested. The paper will present the results of in-situ measurements with the first gamma camera, the spectroscopic performance of Caliste-O and the design of the second generation of gamma camera which aims for real time imaging and spectro-identification.

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Daniel MAIER, Claire BLONDEL, Cyrille DELISLE, Olivier LIMOUSIN, Jerome MARTIGNAC, Aline MEURIS, Francois VISTICOT, Geoffrey DANIEL, Pierre-Anne BAUSSON, Olivier GEVIN, Guillaume AMOYAL, Frederick CARREL, Vincent SCHOEPFF, Charly MAHE, Fabrice SOUFFLET, Marie-Cecile VASSAL. 2020-01-28. Second generation of portable gamma camera based on Caliste CdTe hybrid technology. https://doi.org/10.1016/j.nima.2017.12.027

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