Simulation of the anode structure for capacitive Frisch grid CdZnTe detectors  

作　　者：MIN Jiahua SHI Zhubin QIAN Yongbiao SANG Wenbin ZHAO Hengyu TENG Jianyong LIU Jishan 

机构地区：[1]School of Materials Science ＆ Engineering, Shanghai University, Shanghai 200072, China [2]RAE Engineering Center, RAE Systems Inc., Shanghai 201821, China [3]Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China

出　　处：《Nuclear Science and Techniques》2009年第1期46-50,共5页核技术（英文）

基　　金：Supported by National Natural Science Foundation of China(Grant No.60676002 and No.10675080).

摘　　要：CdZnTe(CZT)capacitive Frisch grid detectors can achieve a higher detecting resolution.The anode structure might have an important role in improving the weighting potential distribution of the detectors.In this paper, four anode structures of capacitive Frisch grid structures have been analyzed with FE simulation,based on a 3-dimensional weighting potential analysis.The weighting potential distributions in modified anode devices(Model B, C and D)are optimized compared with a square device(Model A).In model C and D,the abrupt weighting potential can be well modified.However,with increased radius of the circular electrode in Model C the weighting potential platform away from the anode becomes higher and higher and in Model D,the weighting potential does not vary too much.CdZnTe （CZT） capacitive Frisch grid detectors can achieve a higher detecting resolution. The anode structure might have an important role in improving the weighting potential distribution of the detectors. In this paper, four anode structures of capacitive Frisch grid structures have been analyzed with FE simulation, based on a 3-dimensional weighting potential analysis. The weighting potential distributions in modified anode devices （Model B, C and D） are optimized compared with a square device （Model A）. In model C and D, the abrupt weighting potential can be well modified. However, with increased radius of the circular electrode in Model C the weighting potential platform away from the anode becomes higher and higher and in Model D, the weighting potential does not vary too much.

关 键 词：CdZnTe探测器 性能 重离子 原子核 核电子学 

分 类 号：O571.6[理学—粒子物理与原子核物理]