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Figure 9
A typical distortion of the mirror over the central 200 mm is plotted, along with the beam footprint on the mirror. The mirror distortion over 6σ with the cool-down pitch removed is shown in the figure inset. The profile of the deformation and the induced wavefront aberration are mostly spherical, and therefore we used the 6σ (dashed green line) window instead of 2 × FWHM (or 4.7σ) (dashed brown lines).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 27| Part 5| September 2020| Pages 1131-1140
https://doi.org/10.1107/S1600577520008930
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