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Figure 3
Experimentally determined coherent beam parameters depending on the coherence aperture slit SCAp opening. Top: normalized degree of transverse coherence ζF according to equation (2)[link]. The error bars show the standard deviation of the fitted transverse coherence ζF estimate. Center: the estimate for coherent flux downstream of the pinhole, in the simulation (blue) and the measurement (orange), assuming that the coherent flux is ζF times the total flux. The vertical red line corresponds to the data shown in the bottom part of the figure: the four strongest modes at the pinhole position and their strengths [\beta_{0\cdots 3}] (in white) retrieved from the simulation and the measurement at SCAp = 100 µm × 100 µm together with the reconstructed phase of the Siemens star. All scale bars (red) have a length of 5 µm.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 28| Part 6| November 2021| Pages 1948-1953
https://doi.org/10.1107/S1600577521009140
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