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Figure 5
Relationship between the transverse coherence length and image reconstruction quality evaluated by R-factor and PRTF. The data were grouped into 50 nm bins along the x-axis to highlight trends and reduce statistical fluctuations. Brown and green points represent results from the SASE and SS beams, respectively. (a, b) Average R-factor as a function of transverse coherence length calculated using all seed images (a) and the five best images (b). (c, d) Spatial resolution determined by the 0.5 PRTF criterion for all images (c) and the five best images (d). In both evaluations, greater transverse coherence lengths correlated with improved reconstruction quality. The SS beam consistently yields lower average values and smaller standard deviations than the SASE beam, indicating higher reliability and better convergence in image reconstruction. The horizontal error bars indicate the standard deviation of the transverse coherence length within each 50 nm bin.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 33| Part 4| July 2026|
https://doi.org/10.1107/S160057752600353X
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