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Figure 3
A schematic sketch of the DCD geometry with a misfit. The black lines X, Y and Z mark the laboratory coordinate system. The incident X-ray beam is along the X axis. The blue line is the main DCD optical axis (ρ axis) and the red arrow marks the vector n normal to the scattering plane of the first crystal. The angles ϕ and ω are parasitic angular offsets of the ρ axis from the X axis (primary beam). The angle ρ is the rotation angle of the whole DCD setup around its main optical axis. τ is the angle (assumed to be zero here) between the vector n and the XY plane.

Journal logoJOURNAL OF
APPLIED
CRYSTALLOGRAPHY
ISSN: 1600-5767
Volume 57| Part 2| April 2024| Pages 258-265
https://doi.org/10.1107/S1600576724000657
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