Pinhole imaging to observe spatial jitters of a triple-pulse X-ray source on the Dragon-Ⅱ LIA  

作　　者：Yi Wang Zhi-Yong Yang Xiao-BingJing Qin Li Heng-Song Ding Zhi-Yong Dai 

机构地区：[1]Key Laboratory of Pulsed Power, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China

出　　处：《Nuclear Science and Techniques》2016年第5期140-145,共6页核技术（英文）

摘　　要：In high-energy flash radiography,scattered photons degrade the acquiring image,which limits the resolving power of interfaces and density of dense object.The application of large anti-scatter grid can reduce the scattered photons remarkably,but this requires a stable source position in order to reduce the loss of signal photons in the grid structure.The pinhole imaging technique is applied to observe spatial jitters of a triple-pulse radiographic source of a linear induction accelerator.Numerical simulations are conducted to analyze the imaging performance with the same or close parameters of the pinhole object and experimental alignment.Experiments are carried out to observe spatial jitters of the source between different measurements.Deviations of the source position between different pulses are measured in each experiment.In high-energy flash radiography, scattered photons degrade the acquiring image, which limits the resolving power of interfaces and density of dense object. The application of large anti-scatter grid can reduce the scattered photons remarkably, but this requires a stable source position in order to reduce the loss of signal photons in the grid structure. The pinhole imaging tech-nique is applied to observe spatial jitters of a triple-pulse radiographic source of a linear induction accelerator. Numerical simulations are conducted to analyze the imaging performance with the same or close parameters of the pinhole object and experimental alignment. Experi-ments are carried out to observe spatial jitters of the source between different measurements. Deviations of the source position between different pulses are measured in each experiment.

关 键 词：针孔成像 X射线源 空间 脉冲 直线感应加速器 抖动 高能闪光照相 散射光子 

分 类 号：TL53[核科学技术—核技术及应用] O434.1[机械工程—光学工程]