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Figure 2
Scheme of reflection in the plane (x,z) (y = 0). SO, central incident ray; OP, central reflected ray; [{\theta^{({\rm{i}})}}], glancing angle between central ray SO and reflecting planes RP; the glancing angle between the central reflected ray OP and the reflecting planes is also [{\theta^{({\rm{i}})}}]; 1 and 2, lines parallel to the exact Bragg directions of the incident and reflected waves, respectively; [\Delta\theta] = [{\theta^{({\rm{i}})}}-\theta]; [O\xi], axis of the [\xi] coordinate perpendicular to the direction of line 2; [-{L_h}\Delta\theta] is the [\xi] coordinate of an arbitrary point on the central ray PO at a distance Lh.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 21| Part 4| June 2014| Pages 700-707
doi:10.1107/S1600577514010534
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