Study on the X-ray mirror quality specification in advanced light source

被引：1
|
作者：
Hu, Weishan [1 ,2 ]
Cui, Xiaowen [1 ,2 ]
Li, Ming [1 ,2 ]
Sheng, Weifan [1 ,2 ]
Zhang, Weiwei [1 ]
Jia, Quanjie [1 ]
Yang, Fugui [1 ]
机构：
[1] Chinese Acad Sci, Inst High Energy Phys, Beijing Synchrotron Radiat Facil, Beijing, Peoples R China
[2] Univ Chinese Acad Sci, Beijing, Peoples R China
来源：
FRONTIERS IN PHYSICS | 2022年 / 10卷
基金：
中国国家自然科学基金;
关键词：
X-ray mirror; beamline design; simulation; surface error; synchrotron radiation facility; SLOPE ERRORS;
D O I：
10.3389/fphy.2022.915182
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The influence of the X-ray mirror errors on the performance of the beamline increases as the X-ray beam's coherence improves in advanced light sources. The spatial dispersion of the X-ray beam is crucial for spatial resolution and field of view. However, selecting the appropriate merit function for expressing light distribution and identifying its relationship to optical error is very important in beamline design. We develop a high-efficiency wave-optics simulation platform and a deterministic analysis model to address this issue. The simulation experiments evaluated merit functions, including Strehl ratio, root-mean-square spot size, and encircled energy radius. We proved that the encircled energy radius is a good metric of the x-ray beam spatial dispersion, which matches the results of the Church-Takacs theory. In addition, it is found that limiting the contribution of the low frequency ( wavelength > 1/10 L ) error is effective for specifying the requirements of X-ray mirrors.
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收藏
页数：12
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