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Figure 1
(a) The DuMond diagram of two channel-cut crystals (C1 and C2) arranged in a dispersive configuration (+n,−n)(−n,+n). (b) Ray-tracing simulation of the reduction of angular beam divergence by using a horizontal crystal collimator at an X-ray energy of 12460 eV (λ ≃ 0.0995 nm). The beam parameters are based on beamline ID02 as indicated in Fig. 2[link]. Calculation of the horizontal and vertical beam size (FWHM) using standard slit collimation as well as the first- and third-order reflection of a Si-111 crystal collimator are compared (dispersive set-up). Using the Si crystals in non-dispersive configuration does not change the beam profile.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 26| Part 2| March 2019| Pages 439-444
https://doi.org/10.1107/S1600577518016892
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