硅光电倍增管(SPMT)由硅芯片制成,可用于采集微弱的光信号,图1为SPMT芯片实物图。当可见光照射到SPMT上,SPMT将可见光直接转化为电流信号,通过对电流大小的测量得到光信号的大小。在SPMT前放置一块与之相匹配的塑料闪烁体,即可将电子、γ射线、中子等粒子信号转化为光信号,用于测量粒子信号。本实验研究主要将其应用于快中子测量、快中子阵列成像等领域。SPMT前面ST401塑料闪烁体主要输出频 The silicon photomultiplier tube (SPMT) is made of a silicon chip that can be used to collect weak optical signals. Figure 1 shows the SPMT chip physical map. When the visible light shines on the SPMT, the SPMT converts the visible light directly into a current signal, and obtains the size of the optical signal by measuring the current. Place a matching plastic scintillator in front of the SPMT to convert the particle signals such as electrons, gamma rays, and neutrons into optical signals for measuring particle signals. The experimental study mainly applied to fast neutron measurement, fast neutron array imaging and other fields. SP40 front of ST401 plastic scintillator main output frequency