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Figure 4
Wire scans (blue dots) through the X-ray beam at the focal spot of the KB mirrors along the (a) vertical direction and (b) horizontal direction. The derivatives of the scans are shown by cyan dots and are fitted by Gaussian functions (red lines). The derived FWHM from the Gaussian fits are 1.5 µm and 1.6 µm for the vertical and horizontal directions, respectively. (c) Horizontal spot size measured as a function of X-ray propagation distance (blue dots). The slope of the linear fit (red dashed line) gives the horizontal divergence, i.e. 1.2 mrad.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 32| Part 4| July 2025| Pages 1068-1084
https://doi.org/10.1107/S1600577525004953
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