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Figure 5
Images taken using the CCD camera of the diffracted intensity as a function of the angle of grazing exit ϑ for varying grating orientation angle ψ in linear grey code (black is maximum intensity). The upper three images refer to the positions around perfect alignment to the extreme off-plane orientation (step size Δψ = 0.5°) for a photon energy of 6 keV and an angle of grazing incidence of θ = 0.5°. The size of the diffraction peaks is about 0.3 mm horizontally and 0.26 mm vertically and each single image (1108 pixels horizontally × 224 pixels vertically) covers in the vertical direction an angular interval of Δφ = 0.15°, which corresponds to the separation between the diffraction peaks with indices m = 5 and m = −5. The step size is increased in the lower nine pictures to Δψ = 1°. The more intense odd orders (−3, −1, +1 and +3) are labelled and connected by lines as guides for the eye.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 23| Part 1| January 2016| Pages 91-97
doi:10.1107/S1600577515019761
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