CZT探测器前端读出电子学设计  

Design of Front-end Readout Electronics for CZT Detector

作　　者：吴国斌 赵金龙 刘士兴 林士耀 曹宏睿 WU Guo-bin;ZHAO Jin-long;LIU Shi-xing;LIN Shi-yao;CAO Hong-rui(School of Microelectronics,Hefei University of Technology,Hefei,Anhui 230009,China;Hefei Institute of Physical Science,Chinese Academy of Sciences,Hefei,Anhui 230031,China;Institute of Energy,Hefei Comprehensive National Science Center,Hefei,Anhui 230051,China)

机构地区：[1]合肥工业大学微电子学院,安徽合肥230009 [2]中国科学院合肥物质科学研究院等离子体物理研究所,安徽合肥230031 [3]合肥综合性国家科学中心能源研究院,安徽合肥230051

出　　处：《核电子学与探测技术》2022年第4期699-704,共6页Nuclear Electronics & Detection Technology

基　　金：合肥综合性国家科学中心能源研究院基金(21KZS205)资助。

摘　　要：针对碲锌镉阵列探测器设计了一种前端读出电子学。采用N沟道JFET共源共栅输入缓冲电路和集成运算AD8066构成低噪声电荷灵敏前置放大器,使用Sallen-Key滤波器实现对核脉冲信号的准高斯成形。在室温下对~(152)Eu进行能谱测量,其能量分辨率可达到13.2%121 keV,本设计为后续EAST硬X射线实时二维强度成像及能谱诊断系统研究奠定了重要的实验基础。A front-end readout electronics has been designed for Cadmium Zinc Telluride array detectors.A low-noise charge-sensitive preamplifier is formed using an N-channel JFET common-source commongate input buffer circuit and an integrated op-amp AD8066,and quasi-Gaussian shaping of the nuclear pulse signal is achieved using a Sallen-Key filter.The energy spectrum measurement of 152Eu at room temperature can reach an energy resolution of 13.2%@121 keV.This design provides an important experimental basis for the subsequent research of hard X-ray real-time two-dimensional intensity imaging and energy spectrum diagnosis system in EAST.

关 键 词：CZT探测器 前置放大器 Sallen-Key滤波器 能谱测量 EAST 

分 类 号：TL82[核科学技术—核技术及应用]