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Figure 5
(a) The first six spectral–spatial modes uglobal, l(r). (b) Mode fractions of the spectral–spatial modes as a function of photon energy, showing the energy dependence of each mode's contribution to the overall coherence structure of the source. The results demonstrate the efficient representation of the undulator radiation's coherence properties across the entire energy range.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 33| Part 5| September 2026|
https://doi.org/10.1107/S1600577526007034