PSD performance of EJ-276 and EJ-301 scintillator readout with SiPM array

PSD performance of EJ-276 and EJ-301 scintillator readout with SiPM array
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使用 SiPM 阵列读取 EJ-276 和 EJ-301 闪烁体的 PSD 性能

DOI:
10.1016/j.nima.2022.167148
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发表时间:
2022-07
期刊:
Nuclear Instruments and Methods in Physics Research
影响因子:
--
通讯作者:
Wei Wang
Wei Wang
中科院分区:
其他
文献类型:
--
作者:
Fengzhao Shen;Yongyu Pan;Qibin Fu;Shaopeng Lin;Tuchen Huang;Wei Wang

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对EJ-276和EJ-301闪烁体用硅光电倍增管(SiPM)读出的脉冲形状鉴别(PSD)性能进行了评价。将1英寸和2英寸闪烁体分别耦合到由3 mm和6 mm SiPM组成的8 × 8 SiPM阵列上。SiPM阵列被分成四组,每组用跨导电路(TIA)放大,然后求和以形成单个输出。脉冲波形用500 MHz/12位数字化仪采集并离线分析。基于电荷比较法对PSD的性能进行了评价。1英寸EJ-276闪烁体与SiPM阵列组合,对于250 keVee(电子当量)的能量阈值,表现出1.41的品质因数(FOM)。2英寸EJ-276和1英寸EJ-301闪烁体在相同条件下的FOM分别为1.15和2.15。实验结果表明,采用SiPM阵列读出的EJ-276或EJ-301闪烁体构成的小型快中子探测器具有较好的n / γ分辨能力。
The pulse shape discrimination (PSD) performance of EJ-276 and EJ-301 scintillator readout with silicon photomultiplier (SiPM) was evaluated. Scintillator with 1-inch and 2-inch size was coupled to an 8 × 8 SiPM array, consisting of 3 mm and 6 mm SiPM respectively. The SiPM array was divided into four groups, each amplified with a transimpedance circuit (TIA) and then summed to form a single output. The pulse waveforms were collected with a 500 MHz/12 bit digitizer and analyzed off-line. The PSD performance was evaluated based on the charge comparison method. The 1-inch EJ-276 scintillator combined with SiPM array exhibited a figure of merit (FOM) of 1.41 for an energy threshold of 250 keVee (electron equivalent). The FOM of 2-inch EJ-276 and 1-inch EJ-301 scintillator were 1.15 and 2.15 respectively with the same condition. The experimental results demonstrated the feasibility of a compact fast neutron detector using EJ-276 or EJ-301 scintillator readout by SiPM array with reasonable n / γ discrimination capability.
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