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Figure 4
(a) Measurements of the direct X-ray beam at 96 m from the source (end of the detector tube) using a high-resolution beam viewer (Nyquist resolution about 9.6 µm). The purely slit-collimated beam on the left is noticeably larger in the horizontal direction. Additionally, the parasitic slit scattering deteriorates the beam profile more horizontally. The slit and crystal collimated beam using four Si-333 reflections is shown on the right. A clear reduction of the horizontal beam size is observed as well as the cleaning of parasitic slit scattering in that direction, resulting in an almost box-like beam profile. (b) A horizontal cut through the beam for the two cases displayed in (a).

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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