In this work, we present a novel Position-Sensitive Silicon Photomultiplier based on a charge sharing architecture, which we call Linearly-Graded SiPM (LG-SiPM). We produced both 4x4 mm2 and 8x8 mm2 2D LG-SiPM prototypes with this scheme. The LG-SiPM provides high resolution, low distortion and a very fast output signal, which is fundamental for obtaining a good timing performance. To verify the spatial resolution of the device, we coupled the 4x4 mm2 LG-SiPM prototype to a 4x4 mm2 pixelated LYSO scintillator, with a pitch of 0.8 mm and a height of 10 mm. Under uniform 511 keV irradiation, we were able to easily distinguish the crystal pixels in the flood map and to measure an energy resolution of 18 %.

A Novel Approach to Position-Sensitive Silicon Photomultipliers: First Results

Gola, Alberto Giacomo;Ferri, Alessandro;Tarolli, Alessandro;Zorzi, Nicola;Piemonte, Claudio
2013

Abstract

In this work, we present a novel Position-Sensitive Silicon Photomultiplier based on a charge sharing architecture, which we call Linearly-Graded SiPM (LG-SiPM). We produced both 4x4 mm2 and 8x8 mm2 2D LG-SiPM prototypes with this scheme. The LG-SiPM provides high resolution, low distortion and a very fast output signal, which is fundamental for obtaining a good timing performance. To verify the spatial resolution of the device, we coupled the 4x4 mm2 LG-SiPM prototype to a 4x4 mm2 pixelated LYSO scintillator, with a pitch of 0.8 mm and a height of 10 mm. Under uniform 511 keV irradiation, we were able to easily distinguish the crystal pixels in the flood map and to measure an energy resolution of 18 %.
978-1-4799-0533-1
978-1-4799-0534-8
978-1-4799-3423-2
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11582/207418
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