基于高速电流脉冲前放的数字式电荷积分型能谱仪系统设计  

Design of Digital Charge Integral Spectrometer System Based on High Speed Current Pulse Preamplifier

作　　者：曾国强[1] 盛磊 卿松[1] 严磊 胡传皓 杨寿南 葛良全[1] ZENG Guo-qiang;SHENG Lei;QING Song;YAN Lei;HU Chuan-hao;YANG Shou-nan;GE Liang-quan(Key Laboratory of Geoscience and Nuclear Technology,Chengdu University of Technology,Chengdu 610059 China)

机构地区：[1]成都理工大学四川省地学核技术重点实验室,四川成都610059

出　　处：《湘潭大学学报（自然科学版）》2018年第4期28-34,共7页Journal of Xiangtan University(Natural Science Edition)

基　　金：国家重点研发计划项目(2017YFC0602100);国家自然科学基金项目(41474159);国家自然科学基金项目(41774147)

摘　　要：基于电流脉冲前放的数字式电荷积分能谱仪可以对29 Mcps的信号发生器测试信号输入保证99.98%的脉冲通过率.该文设计的数字式电荷积分能谱仪系统连接NaI(Tl)探测器对Cs-137放射源测量,统计其通过率为82.3kcps,662keV射线能量分辨率为7.53%,系统死时间为2.26%.相同条件下,传统数字化能谱仪系统的能量分辨率为7.53%,系统死时间为24.5%.通过实验可知,该文设计的DQDC数字化能谱仪系统相比于传统数字化能谱仪具有更高的脉冲通过率,能量分辨率大致相当.The digital charge integral spectrometer based on current pulse preamplifier designed in this paper can guarantee the pulse pass rate of 99.98% for the signal input of 29 Mcps signal generator. The digital charge integration spectrometer system designed in this paper is connected to the NaI（Tl） detector for Cs-137 radioactive source measurement. The pass rate is 82.3 kcps, and the 662 keV ray energy resolution is 7.53%. The system dead time is 2.26%, under the same conditions, the energy resolution of the traditional digital spectrometer system is 7.53%, and the system dead time is 24.5%. It can be seen from the experiment that the DQDC digital spectrometer system designed in this paper has higher pulse passing rate than the traditional digital spectrometer, and the energy resolution is roughly equivalent.

关 键 词：高速电流脉冲前放 高通过率能谱仪 数字恒比定时甄别器 电荷积分能谱仪 

分 类 号：TN6[电子电信—电路与系统]