Silicon photomultiplier-based Compton Telescope for Safety and Security (SCoTSS)

A Compton gamma imager has been developed for use in consequence management operations and in security investigations. The imager uses solid inorganic scintillator, known for robust performance in field survey conditions. The design was constrained in overall size by the requirement that it be perso...

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Bibliographic Details
Published in:arXiv.org 2016-01
Main Authors: Sinclair, Laurel E, Saull, Patrick R B, Hanna, David S, Seywerd, Henry C J, MacLeod, Audrey M L, Boyle, Patrick J
Format: Article
Language:English
Subjects:
Binoculars
Field of view
Gamma rays
Glass substrates
Image resolution
Photomultiplier tubes
Safety
Scintillation counters
Security
Silicon
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Summary:A Compton gamma imager has been developed for use in consequence management operations and in security investigations. The imager uses solid inorganic scintillator, known for robust performance in field survey conditions. The design was constrained in overall size by the requirement that it be person transportable and operable from a variety of platforms. In order to introduce minimal dead material in the path of the incoming and scattered gamma rays, custom silicon photomultipliers (SiPMs), with a thin glass substrate, were used to collect the scintillation light from the scatter layers. To move them out of the path of the gamma rays, preamplification electronics for the silicon photomultipliers were located a distance from the imager. This imager, the Silicon photomultiplier Compton Telescope for Safety and Security (SCoTSS) is able to provide a one-degree image resolution in a plus-minus 45 degree field of view for a 10 mCi point source 40 m distant, within about one minute, for gamma-ray energies ranging from 344 keV to 1274 keV. Here, we present a comprehensive performance study of the SCoTSS imager.
ISSN:2331-8422
DOI:10.48550/arxiv.1601.01979