作　　者： ; ; ; ; ; ; ; ; ;

机构地区： 中国工程物理研究院流体物理研究所

出　　处： 《强激光与粒子束》 2010年第3期647-650,共4页

摘　　要： 将门控分幅相机与快闪烁晶体结合,构成时间分辨X射线诊断系统,对神龙一号直线感应加速器产生的高能脉冲X射线源焦斑进行了测量,在时间间隔为10 ns的情况下,获得了焦斑尺寸随时间的变化曲线。在此基础上,设计了单像素尺寸为0.78 mm×0.78 mm的LYSO闪烁晶体阵列,并进行了X射线照射晶体阵列发光的初步实验,结果表明该阵列可用于高能X射线源焦斑的时间分辨诊断,并能显著提高成像的空间分辨力。 A time-resolved measurement system of spot size for X-ray sources was constructed by coupling a gated CCD camera with a fast scintillator crystal. The spot size of the high-energy pulsed X-ray source from the Dragon-I linear induction accelerator was measured at 10 ns intervals, and a curve of spot size versus time was obtained. An LYSO crystal array with a pixel size of 0. 78 mm was also designed and tested in X-ray field, and primary experimental results show the array can be used for time-resolved spot size diagnosis of the high energy X-ray source and significantly improve the spatial resolution of X-ray images.

关 键 词： 射线焦斑 时间分辨 晶体 直线感应加速器

领　　域： [核科学技术] [核科学技术]