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Figure 4
The `workaround' process starts by defining the proper position/direction of the beam and the detector by `telling' WISER that the element is a mirror (top left image), and setting the angle of incidence (black rectangles in the right image). Then a rotation is applied to the optical element (red rectangles in the right image) to have the required angle of incidence on the grating to diffract the beam in the detector direction (lower left image).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 29| Part 6| November 2022| Pages 1344-1353
https://doi.org/10.1107/S1600577522009134
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