光学元件表面粗糙度对第三代同步辐射光源空间相干性的影响

Effect of Surface Roughness of Optical Elements on Spatial Coherence of X-Ray Beams from the Third Generation Synchrotron Radiation Sources

以单丝的同轴全息干涉花样为判别标准 ,通过计算机数值模拟 ,研究了 Be窗的表面粗糙度对硬 X射线相干特性的影响。提出了 X射线在粗糙表面反射的一个简单模型 ,以此为基础模拟研究了反射镜表面粗糙度对硬 X射线及软 X射线空间相干特性的影响 ,模拟结果与实验结果相符。

Effect of surface roughness of Be window on the spatial coherence of hard X ray beams is investigated by means of digital simulation, in which the interference pattern of one fiber in line holography is employed to estimate the coherence. A simple model for X ray reflection from rough surface is proposed. Based on this model, effect of surface roughness of reflection mirror on X ray beams, including hard X ray and soft X ray, is simulated. The result from simulation is consistent with that from experiments.