标题： 基于针孔成像技术的三脉冲X射线源空间抖动的实验观测 显示英文标题

标题： Experimental observation of spatial jitters of a triple-pulse x-ray source based on the pinhole imaging technique

摘要： 在高能闪光射线照相术中，散射光子会降低获取的图像质量，这限制了界面的分辨能力和致密物体的密度。 大型防散射栅格的应用能够显著减少散射光子，但需要非常稳定的光源位置，以减少光子在栅格结构中的损失。 针孔成像技术被用于观察由直线感应加速器产生的三脉冲射线源的空间抖动。 数值模拟用于分析针孔物体和实验对准参数相同或接近时的成像技术性能。 进行了实验以观察不同测量之间的光源空间抖动。 每次实验中也测量了不同脉冲之间光源位置的偏差。 显示英文摘要

摘要： In high-energy flash radiography, scattered photons will degrade the acquiring image, which limits the resolving power of the interface and density of the dense object. The application of large anti-scatter grid is capable of remarkably decreasing scattered photons, whereas requires a very 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 produced by a linear induction accelerator. Numerical simulations are taken to analyze the performance of the imaging technique with 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 also measured in each experiment.