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Figure 10
The middle and bottom left-hand panels show the detector images of a source with 11 source sections, emitting photon energies at 499.5, 500.0 and 500.5 eV. In the central panel, the aperture defining the illumination of the Wolter mirrors is set to 1 mm, corresponding to 1/6 of full illumination (color code: red). The bottom panel shows the results for full illumination (color code: black). In the top left panel, projections of the two detector images are shown in the imaging direction, and projections in the dispersive direction are shown in the middle and bottom right-hand panels. In the top right panel, the widths of the 11 peaks in the imaging direction are shown for openings 1–8 mm of the Wolter mirror aperture. The decrease in transmission when the Wolter optics aperture is closing is directly reflected in the two detector images. All projected images are normalized to the same total intensity, facilitating comparison of resolution. The energy resolution (middle and bottom right-hand panels) is not affected by the Wolter optics aperture.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 31| Part 5| September 2024|
https://doi.org/10.1107/S1600577524005988
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