Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2009, Vol. 20 ›› Issue (1): 46-50 doi: 10.13538/j.1001-8042/nst.20.46-50

• NUCLEAR ELECTRONICS AND INSTRUMENTATION • Previous Articles     Next Articles

Simulation of the anode structure for capacitive Frisch grid CdZnTe detectors

MIN Jiahua1 SHI Zhubin1,* QIAN Yongbiao1,2 SANG Wenbin1 ZHAO Hengyu1 TENG Jianyong1 LIU Jishan3   

  1. 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
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MIN Jiahua, SHI Zhubin, QIAN Yongbiao, SANG Wenbin, ZHAO Hengyu. Simulation of the anode structure for capacitive Frisch grid CdZnTe detectors.Nuclear Science and Techniques, 2009, 20(1): 46-50     doi: 10.13538/j.1001-8042/nst.20.46-50

Abstract:

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.

Key words: Frisch grid, CdZnTe detectors, Weighting potential