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Figure 1
Setup of the PSSS in SwissFEL (side view and top view, compare Rehanek et al., 2017BB24). The diamond gratings are located 4 m upstream and diffract the beam in the horizontal plane. The first diffracted order is then Bragg reflected from a bent Si crystal and projected to a camera that can be rotated in a distance of 1 m around analyser crystals, providing a θ/2θ operation scheme. A helium-filled flight tube between the crystal and the camera ensures sufficient transmission even at lower photon energies.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 28| Part 6| November 2021| Pages 1978-1984
https://doi.org/10.1107/S1600577521009619
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