Speaker
Description
In recent years, silicon photomultiplier (SiPM) has been widely used to replace photomultiplier tube (PMT) for scintillator readout, especially in high performance neutrino experiments. SiPM offers gain similar to those of PMT, but with merits such as higher quantum efficiency, low bias voltage, compact volume, high ruggedness, and magnetic field compatibility. However, SiPM is indeed inferior in dark noise levels compared with PMTs. In this study, the performance of various scintillators read out with SiPM were systematically evaluated and compared with those measured with PMTs for both energy measurement and pulse shape discrimination (PSD) applications. The energy resolution of the widely used NaI(Tl) scintillator coupled to SiPM arrays with different sizes was evaluated. A gamma and neutron phoswich consisting of NaI(Tl) crystal and LiI(Eu) crystal with readout SiPM arrays was developed for mixed radiation detection. The characteristics of CLYC scintillator which is sensitive to both gamma-rays and neutrons was evaluated with SiPM readout and dedicated circuit. The PSD performance of the latest EJ-276 and EJ-301 organic scintillator coupled to SiPM arrays was investigated. Our results show that both the energy resolution and PSD performance of scintillators-SiPM systems are comparable with those using PMTs.
