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Figure 3
φ (ω) (a) and its gradient (b) with the rotation axis tilted by an angle of 0.01° on the XZ plane. A, B, C and D denote diffraction spots. Spot A on the φ (ω) curve has been magnified to help explain the movement of this spot from A′ on the curve of perfect alignment (dashed line) to A. When the rotation axis is tilted by 0.01° in the XZ plane, the φ (ω) curve as shown by the dashed line will move down to the position of the solid line (if the tilted angle is −0.01°, the curve will move up) and A′ moves to A′′. In order to maintain the Bragg condition, A′′ has to ascend along the curve to A.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 22| Part 4| July 2015| Pages 1062-1071
https://doi.org/10.1107/S1600577515006165
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