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TitleSilicon photomultiplier-based Compton Telescope for Safety and Security (SCoTSS)
AuthorSinclair, LORCID logo; Saull, P; Hanna, D; Seywerd, H; MacLeod, A; Boyle, P
SourceIEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers) vol. 61, no. 5, 2014 p. 2745-2752, Open Access logo Open Access
Alt SeriesEarth Sciences Sector, Contribution Series 20130419
PublisherIEEE Publishing
Mediapaper; on-line; digital
File formatpdf; html
ProgramCanadian Hazard Information Service
Released2014 10 01
AbstractA 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 ±45 ° 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.
Summary(Plain Language Summary, not published)
Prompted by the needs of NRCan's Nuclear Emergency Response group under the Canadian Hazards Information Service, we built a gamma imager which can show the locations of radioactivity overlaid on a photograph of the surroundings. The imager is innovative and of scientific interest in the fields of radiation detection, medical imaging, and light collection. In October of 2013, quantitative performance measures of the imager were presented at an international conference and included in the conference proceedings. This is a full peer-reviewed journal version of that proceedings paper.

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