基于SiPM读出的阵列式机载核辐射探测系统设计与实现  

Arrayed Airborne Nuclear Radiation Detection Based on SiPM Readout System Design and Implementation

作　　者：涂雄自 吴明江 桂福浩 杨小峰[1] 曾国强[1] 王睿奇 顾民[1] TU Xiongzi;WU Mingjiang;GUl Fuhao;YANG Xiaofeng;ZENG Guoqiang;WANG Ruiqi;GU Min(School of Nuclear Technology and Automation Engineering,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]成都理工大学核技术与自动化工程学院,四川成都610059

出　　处：《核电子学与探测技术》2024年第6期999-1007,共9页Nuclear Electronics & Detection Technology

基　　金：四川省科技计划项目任务书(重点研发项目)气载放射性气溶胶在线测量技术研究与应用(2023YFG0347)。

摘　　要：本文基于最新的探测器材料、半导体光电转换器件和高性能微处理器,开展了新一代机载伽马能谱仪研究。研发一种SiPM阵列式机载核辐射探测系统,设计与之配套的能谱读出电路单元。硬件设计主要由SiPM溴化铈伽马能谱采集器和阵列式机载核辐射探测载荷组成,其中SiPM数字多道伽马能谱采集器是伽马能谱仪的核心部件,将SiPM读出电路、前置放大、程控增益、高速ADC转换、FPGA&ARM控制、供电及TCP/IP协议转换等功能集成为一体,实现了高度集成与数字控制的功能。测试表明:SiPM溴化铈伽玛能谱采集器能量分辨率优于4.2%(137Cs@662 keV),以此设计的阵列式机载核辐射探测系统重量轻、分辨率高,能够实现放射源识别与搜索。同时该系统可搭载于平台开放的小型无人机平台上,将能谱信息与北斗地理信息、时间信息等数据实现同步,完成平台对接,可应用于核电站监测、环境保护、反恐应急等场景,具有广泛的应用价值。In this paper,a new generation of airborne gamma spectrometer has been carried out based on the latest detector materials,semiconductor photovoltaic conversion devices and high-performance microprocessors.A SiPM array type airborne nuelear radiation detection system is developed,and the energy spectrum readout circuit unit supporting it is designed.The hardware design mainly consists of SiPM cerium bromide gamma spectrum collector and arrayed airbome nuclear radiation detection load,of which the SiPM digital multi-channel gamma speetrum colleetor is the core component of the gamma speclrometer,the SiPM readout circuit,preamplification,programmable gain control,high-speed ADC conversion,FPGA&ARM control,power supply and TCP/lP protocol conversion and other funetions are integrated into a single unit to realize the highly integrated and digitally controlled funetions.Highl integrated and digitally controlled.Tests show that the energy resolution of SiPM Cerium Bromide Gamma Spectrum Colleetor is better than 4.2%(@662 keV for 1Cs),and the array-type airborne nuclear radiation detection system designed in this way is lightweight,high-resolution,and capable of identilying and searching for radioactive sources.At the same time,the system can be mounted on a small unmanned aireralt platlorm with an open platform,synchronize the energy spectrum information with Beidou geographic information,time information and other data to complete the platform docking,which can be applied to nuclear power plant monitoring,environmental protection,anti-terrorism and emergency response scenarios,and has a wide range of application value.

关 键 词：核辐射探测 SIPM 数字多道 北斗定位 

分 类 号：TL82[核科学技术—核技术及应用]