互嵌式壳型电极探测器的三维电学性能仿真

3D Simulations of Electrical Characteristics of Interleaved Shell-Electrode Detector

提出了一种基于闭合式壳型电极探测器(closed shell-electrode detector,CSED)的互嵌式壳型电极探测器(interleaved shell-electrode detector,ISED,中国专利#zl201721077852.6),通过减少死区来提高电荷收集效率.该文对ISED的新设计理念进行了详细的讨论.利用Silvaco TCAD工具对ISED的电学特性进行了三维模拟,包括电势分布和电场分布.在可形成有效阵列的"组合单元"中,ISED由嵌套的壳型电极引入的死区是CSED中的一半.ISED单元中交错壳型电极引入的对电性能的干扰是最小的,并且低电场区保持在方形单元内的两个对角上.该文还对探测器的全耗尽电压、电容、击穿电压、I-V和C-V特性进行了模拟,并给出了结果 .

An interleaved shell-electrode detector （ISED,Chinese patent #zl201721077852.6）, based on the closed shell-electrode detector （CSED）, is proposed for the improvement of charge collection efficiency by reducing the dead region. The novel design concept of ISED has been be discussed in detail. Full 3D simulations of detector electric properties including profiles of electric potential and electric field have been carried out using a Silvaco TCAD tool. The dead region introduced by interleaved shell electrodes in an ISED single cell （the unit cell） that can form an effective array is half of that in a CSED. The disturbance of the electric properties by introducing interleaved shell electrodes in an ISED is minimum and kept in two localized corners in a square shaped single cell. Other detector properties such as detector full depletion voltage, capacity, breakdown voltage, and I-V and C-V characteristics have also been simulated, and results will be given.