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Figure 8
Using the same Ca image as shown in Fig. 5[link](a), we separately calculated power spectral densities Sx(ur) and Sy(ur) with the method shown in Fig. 8[link] with angular ranges of ±30° about the x and y axes, respectively. This yielded spatial resolution estimates of δres,x = 6.9 µm and δres,y = 6.4 µm, whereas the azimuthally averaged spatial resolution result in Fig. 5[link] was δres = 6.5 µm. We truncated the maximum value of ur shown here to 0.29 µm−1. The spatial resolution asymmetry might have been due to a slight tilt misalignment of the capillary optic, but we did not systematically explore that.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 33| Part 2| March 2026| Pages 319-330
https://doi.org/10.1107/S1600577526000925
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