Dresden 2013 – scientific programme
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T: Fachverband Teilchenphysik
T 64: Halbleiterdetektoren: Forschung und Entwicklung 4
T 64.1: Talk
Wednesday, March 6, 2013, 16:45–17:00, GER-007
A Digital Silicon Photomultiplier with Multiple Time-to-Digital Converters — Erika Garutti2, Alessandro Silenzi1, and •Chen Xu1,2 — 1DESY, Hamburg, Germany — 2University Hamburg, Hamburg, Germany
A silicon photomultiplier (SiPM) with pixel level signal digitization and colunm-wise connected time-to-digital converters (TDCs) has been developed for an endoscopic Positron Emission Tomography (PET) detector. A digital SiPM has pixels consist of a single photon avalanche diode (SPAD) and circuit elements to optimize overall dark counts and temporal response. Compared with conventional analog SiPM, digital SiPM's direct signal route from SPAD to TDC improves single photon time resolution. In addition, using multiple TDCs can perform the statistical estimation of the time-of-arrival in multiple photon detection case such as readout of scintillation crystals. Characterization measurements of the prototype digital SiPM and a Monte-Carlo simulation to predict the timing performance of the PET detector will be shown.