摘要
基于GEANT4工具包及使用225kV最高管电压X射线机,探讨了在不同的X射线入射能量下,改变微通道板工作电压及几何参数时,增益、探测效率及空间分辨率的特性变化情况,为实际应用提供了参考。结果表明:微孔直径20μm、长径比40、开口面积60%、偏角8°;工作电压970V,工作环境真空度10-3Pa时,微通道板探测器能满足工业CT系统的要求。
Based on the GEANT4 toolkit and an X ray machine whose maximum tube voltage was 225 kV,the characteristic changes of the gain,the detection efficiency and also the spatial resolution of the X-ray detector were studied through the working voltage and geometric parameters of the micro-channel plate under different incident energies.It can provide a reference for practical application.Study confirms that the micro-channel plate detector can meet the requirement of industrial CT system proving the following settings are met:the micro pore diameter of20μm,length to diameter ratio of 40,the opening area of 60%,angle of 8°,working voltage of 970 Vand the working environment of vacuum degree 10-3 Pa.
出处
《无损检测》
2014年第8期1-6,共6页
Nondestructive Testing
基金
兰州大学自然科学类中央高校基本科研专项资助项目(860452)
