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Preliminary Study of Performance Evaluation of a Dual-mode Compton Camera by Using Geant4
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 Title & Authors
Preliminary Study of Performance Evaluation of a Dual-mode Compton Camera by Using Geant4
Park, Jin Hyung; Seo, Hee; Kim, Seoung Hoon; Kim, Young Soo; Kim, Chan Hyeong;
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A double-scattering type Compton camera which is appropriate to imaging a high-energy gamma source has been developed for nuclear material surveillance at Hanyang University. The double-scattering type Compton camera can provide high imaging resolution; however, it has disadvantage of relatively low imaging sensitivity than existing single-scattering type Compton camera. In this study, we introduce a novel concept of a dual-mode Compton camera which incorporates two different types of Compton camera, i.e., single- and double-scattering type. The dual-mode Compton camera can operate high-resolution mode and high-sensitivity mode in a single system. To maximize its performance, the geometrical configuration was optimized by using Geant4 Monte Carlo simulation toolkit. In terms of imaging sensitivity, high-sensitivity mode had higher sensitivity than high-resolution mode up to 100 times while high imaging resolution of the double-scattering Compton camera was maintained.
Compton camera;Dual-mode;Nuclear material surveillance;Geant4;
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