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A lamellar model for the X-ray rocking curves of sagittally bent Laue crystals
Z Zhong1, C C Kao, D P Siddons
1National Synchrotron Light Source, Brookhaven National Laboratory, Upton, NY 11973, USA. zhong@bnl.gov
Abstract:
The use of sagittally bent asymmetric Laue crystals in horizontally focusing monochromators for high-energy synchrotron X-rays necessitates simulation of the X-ray reflectivity by such crystals. Based on the theory of the lattice distortion in the diffraction plane of sagittally bent Laue crystals, a lamellar model was developed to predict their rocking curves. The model was experimentally verified by rocking-curve measurements from various reflections on silicon crystals of four representative orientations, sagittally bent to various radii, using X-rays of 67 keV energy.
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