【作者】 张岚； 李元景； 朱维彬； 郑晓翠； 林德序； 罗丛； 毛绍基； 邓智；

【Author】 Lan Zhang Yuanjing Li Weibin Zhu Xiaocui Zheng DexuLin Cong Luo Shaoji Mao (Nuctech Company Limited,Bebijing,100084) YuanjingLi Zhi Deng (Tsinghua University,Bebijing,100084)

【机构】 同方威视技术股份有限公司； 清华大学；

【摘要】 碲锌镉探测器的保护环可以降低表面漏电流,成形电场,提高电荷的收集能力。粘贴在探测器侧壁的保护环,也可感应探测器内部的电荷移动,产生信号,本文就是针对这一特性进行分析研究的。单双保护环存在时,模拟了探测器内部的电场分布,提出了双保护环的概念,测试了双保护环探测到的辐射信号和伽玛能谱,并预测了它们的应用。更多还原

【Abstract】 Guard rings of CZT detectors could decrease the surface leakage current and reshape the electric field inside CZT detectors to improve the charge collection.Guard rings pasted on the side walls of CZT detectors are also sensitive to the movement of charges inside CZT detectors and produce induced signals.The paper focuses the research on this characteristic.The paper provides the simulated electric field inside CZT detectors with single or double guard rings and put forward the concept applying double guard rings.The signals and ¹³⁷Cs 662keV gamma spectra from the cathode and two guard rings are provided here.At the same time the paper indicates their application.更多还原