Study of a sealed high gas pressure THGEM detector and response of alpha particle spectra
Study of a sealed high gas pressure THGEM detector and response of alpha particle spectra
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密封高气压THGEM探测器及α粒子光谱响应的研究
DOI：
10.1088/1674-1137/41/4/046001
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发表时间：
2017
影响因子：
3.6
通讯作者：
Yang-Heng Zheng
中科院分区：
文献类型：
--
作者：
Yu-Ning ZHANG;Qian LIU;Hong-Bang LIU;Yi-Gang XIE;Xiao-Rui LYU;Shi Chen;Wen-Qian Huang;Dao-Jin HONG;Yang-Heng Zheng
组装了一台工作在纯氩气中的密封高气压探测器。它由一个5 cm × 5 cm的PCB THGEM（厚气体电子倍增器）组成。介绍了探测器的结构和实验装置。在2个大气压下的性能主要表现在选择最佳的电离区和感应区电压。研究了用相对气体增益测量的α粒子谱的形状与气压（1.3 $\sim $2.0 atm）的关系。用加权场E/P表示的8组相对气体增益与工作电压的关系进行了归一化，与理论一致。结果表明，采用灵敏气压计测量和气体增益校核，该气室气密性良好。对不考虑气体增益的能量沉积进行了蒙特卡罗模拟，并与实验结果进行了比较。
A sealed high gas pressure detector working in pure argon is assembled. It consists of a 5 cm $\times$ 5 cm PCB THGEM (THick Gaseous Electron Multipliers). The detector structure and experimental setup are described. The performances under high pressure of 2 atm mainly consist in selecting optimal voltages for ionization region and induction region. The dependence of the shape of Alpha particle spectra measured with relative gas gain on gas pressure (1.3 $\sim$ 2.0 atm) has been studied. The 8 groups of relative gas gain versus working voltage of THGEM expressed by weighting filed $E/P$ are normalized, being consistent with theory. The results show that the air tightness of the chamber is good measured by a sensitive barometer and checked with gas gain. The experimental results are compared with Monte Carlo simulation on energy deposition without gas gain involved.