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23 December 2003 Influence of crystal surface roughness on the angular spread of x-ray diffracted beam
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One of the factors influencing the focus size in diffractive-refractive optics is the quality of diffracting surface. If the surface is uneven, then the diffraction at each point of the surface is a combination of an asymmetric and inclined diffraction (general asymmetric diffraction). This somewhat deviates and spreads the diffracted beam. The integration over the surface hit by an incident beam gives the angular spread of the diffracted beam. It is shown that in some cases (highly asymmetric, highly inclined cut) the etched surface may create the spread of the diffracted beam, such that it causes a significant broadening of the focus. In this case a mechanical-chemical polishing is necessary.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Jaromira Hrda, Jaromir Hrdy, Olivier Hignette, and Joanna Hoszowska "Influence of crystal surface roughness on the angular spread of x-ray diffracted beam", Proc. SPIE 5195, Crystals, Multilayers, and Other Synchrotron Optics, (23 December 2003);


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