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Figure 9
(a)–(d) Numerical simulations performed for the focused beam using HRM setup 1 at the U M5-edge. In (a) we present the energy profile of the beam with different colors representing different energies. The size of the vertically focused beam is plotted in (b), agreeing well with the data in Figs. 5[link](d) and 6[link](a). In (c) the linear energy dispersion of the source can be seen, with the solid black line representing Gsrc = −4.1 µm meV−1. Aberrations are observed towards the edges. (d) An image of the elongated `rainbow' source. To mimick the horizontally focused beam (x-direction) a narrow Gaussian profile (FWHM ∼20 m) was used.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 33| Part 1| January 2026| Pages 218-226
https://doi.org/10.1107/S1600577525010318
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