We present a simple method to measure the spatial coherence of hard x-ray beams. Based on the convolution of Gaussian functions, we analyze the diffraction patterns of a grating irradiated by partially coherent hard x rays with a constrained beam diameter. The spatial coherence properties of an x-ray beam are obtained from the width of the diffraction peaks with high accuracy. The results of experiments conducted by combining a pinhole with a grating show a good agreement with our calculation using the Gaussian-Schell model.
Hua, WQ,Zhou, GZ,Wang, YZ,et al. Measurement of the spatial coherence of hard synchrotron radiation using a pencil beam[J]. CHINESE OPTICS LETTERS,2017-01-01,15(3):-.
