飞点扫描X射线背散射系统研究  

Study of X-ray backscatter system based on flying-spot scanning

作　　者：唐添 徐捷[1] 王新[1] 穆宝忠[1] TANG Tian;XU Jie;WANG Xin;MU Baozhong(School of Physics Science and Engineering,Tongji University,Shanghai 200092,China)

机构地区：[1]同济大学物理科学与工程学院

出　　处：《光学仪器》2019年第5期76-84,共9页Optical Instruments

基　　金：国家重点研发计划项目（2016YFC0800904-Z03）;中央高校基本科研业务费专项资金资助（22120180135）

摘　　要：围绕车辆贩运违禁品的精确、快速查缉需求,开展了小型化、低辐射的飞点扫描X射线背散射系统研究。设计了小型化飞点扫描X射线背散射系统的斩波机构、背散射探测器。利用研制的系统开展了X射线背散射成像实验,研究了X射线能量、功率对系统成像对比度和信噪比的影响。实验表明,系统成像分辨率约为2 mm,能够准确检测出隐藏在陶瓷物品中的毒品模拟物。小型化飞点扫描X射线背散射系统的研究可为车辆安检难题和降低检测中的辐射危害提供参考。A miniaturized,low-radiation X-ray flying-spot scanning backscattering system was developed around the precise and rapid investigation of trafficking contraband by vehicles.A chopper mechanism and a backscatter detector for miniaturized flying-spot scanning backscattering systems were designed.The X-ray backscatter imaging experiment was carried out by using the developed miniaturized flying-spot scanning system.The effects of X-ray energy and power on the imaging contrast and signal-to-noise ratio of the system were studied.The developed system has an imaging resolution of approximately 2 mm and is capable of clearly detecting drug mimics hidden in ceramic articles.The research of miniaturized X-ray backscattering system can provide reference for vehicle security problems and reduce radiation hazards in testing.

关 键 词：X射线背散射 飞点扫描 斩波轮 闪烁体 

分 类 号：O434.1[机械工程—光学工程]