13 September 2011 SSPM scintillator readout for gamma radiation detection
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Abstract
Silicon-based photodetectors offer several benefits relative to photomultiplier tube-based scintillator systems. Solid-state photomultipliers (SSPM) can realize the gain of a photomultiplier tube (PMT) with the quantum efficiency of silicon. The advantages of the solid-state approach must be balanced with adverse trade-offs, for example from increased dark current, to optimize radiation detection sensitivity. We are designing a custom SSPM that will be optimized for green emission of thallium-doped cesium iodide (CsI(Tl)). A typical field gamma radiation detector incorporates thallium doped sodium iodide (NaI(Tl)) and a radiation converter with a PMT. A PMT's sensitivity peaks in the blue wavelengths and is well matched to NaI(Tl). This paper presents results of photomultiplier sensitivity relative to conventional SSPMs and discusses model design improvements. Prototype fabrications are in progress.
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Stuart A. Baker, Stuart A. Baker, Christopher Stapels, Christopher Stapels, J. Andrew Green, J. Andrew Green, Ronald E. Guise, Ronald E. Guise, Jason A. Young, Jason A. Young, Larry Franks, Larry Franks, Britany Stokes, Britany Stokes, Elizabeth Wendelberger, Elizabeth Wendelberger, "SSPM scintillator readout for gamma radiation detection", Proc. SPIE 8144, Penetrating Radiation Systems and Applications XII, 81440O (13 September 2011); doi: 10.1117/12.895195; https://doi.org/10.1117/12.895195
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