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Measurement of the spatial coherence of hard synchrotron radiation using a pencil beam

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Abstract

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.

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DOI:10.3788/col201715.033401

所属栏目:X-ray optics

收稿日期:2016-09-30

录用日期:2016-12-23

网络出版日期:2017-02-02

作者单位    点击查看

Wenqiang Hua:Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201 204, China
Guangzhao Zhou:Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201 204, China
Yuzhu Wang:Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201 204, China
Ping Zhou:Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201 204, China
Shumin Yang:Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201 204, China
Chuanqian Peng:School of Optoelectronic Information, Chongqing University of Technology, Chongqing 400050, China
Fenggang Bian:Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201 204, China
Xiuhong Li:Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201 204, China
and Jie Wang:Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201 204, China

联系人作者:联系作者(wangjie@sinap.ac.cn)

备注:Authors wish to thank the beamlines BL19U2 and BL13W1 at the SSRF. The grating is manufactured by Group XIL of the SSRF. This work was financially supported by the National Natural Science Foundation of China under Grant Nos. 11505278 and 11675253.

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引用该论文

Wenqiang Hua, Guangzhao Zhou, Yuzhu Wang, Ping Zhou, Shumin Yang, Chuanqian Peng, Fenggang Bian, Xiuhong Li, and Jie Wang, "Measurement of the spatial coherence of hard synchrotron radiation using a pencil beam," Chinese Optics Letters 15(3), 033401 (2017)

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