12MeV LIA X射线斑点测试及其调制传递函数
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摘要: 介绍了测试12MeV LIA X光斑点的测试系统，利用刀口法和大孔成像法测出所成像的黑密度分布, 获得X光斑点大小结果; 根据该光源的近乎轴对称特点和大孔所成像的密度分布，经数值处理拟合出斑点强度的空间分布；利用该系统，获得了判断12MeV LIA X光成像空间分辨能力的调制传递函数。Abstract: The measurement system of Xray spot size for the 12MeV LIA is described in this paper. The Xray spot size and modulation transfer function, which judges the space resolution of 12MeV LIA Xray image, for the 12MeV LIA can be obtained using this system. According to the characteristic of approximate axial symmetry of Xray source and the distribution of image black density, the spa ce distribution of spot intensity is also imitated．
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