CsI(Tl) scintillation detectors based on a silicon photomultiplier (SiPM) were tested for low-energy proton detection. Pulse shape analysis of the SiPM signals with a transimpedance amplifier was conducted to investigate the saturation effect due to the recovery time of a pixel and to evaluate particle identification capability. To recover energy linearity, a saturation correction method based on a non-paralyzable dead time model was proposed. The setup using the SiPM with a 25 $\mathrm{\mu }$m pixel pitch well separated protons and deuterons at energies from 3 to 12 MeV. Additionally, a readout circuit without an amplifier was tested to investigate another type of saturation due to the voltage drop effect.

测试了基于硅光电倍增管（SiPM）的CsI（Tl）闪烁探测器的低能质子探测。使用跨阻放大器对SiPM信号进行脉冲形状分析，以研究由于像素恢复时间而引起的饱和效应并评估颗粒识别能力。为了恢复能量线性，提出了一种基于不可瘫死时间模型的饱和度校正方法。使用25的SiPM进行设置$\mathrm{\mu }$m像素间距在3到12 MeV的能量下能很好地分离质子和氘核。此外，还测试了没有放大器的读出电路，以研究由于电压降效应而引起的另一种类型的饱和。