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Figure 4
Predicted and measured centroid energy distributions on the surface of a Si(660) analyser with 100 mm diameter and 1 m bending radius at a Bragg angle of 88.7° measured with a position-sensitive detector in off-focus geometry. 10 mm stripes were cut off the top and the bottom of the analysers leaving a maximum vertical size of 80 mm. The detector was displaced 20 mm inward to the Rowland circle, leading to a focus of 2 mm (40 pixels) in horizontal size. The colour corresponds to the shift in energy, whereas the brightness indicates the collected intensity. The method used to image the experimental energy-intensity map is described in §3[link].

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 21| Part 4| July 2014| Pages 762-767
doi:10.1107/S1600577514011163
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