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4 October 2023 Towards wavefront preservation x-ray crystal monochromator for coherent light sources
Lin Zhang, Matthew Seaberg, Hasan Yavas
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Proceedings Volume PC12694, Advances in X-Ray/EUV Optics and Components XVIII; PC1269405 (2023) https://doi.org/10.1117/12.2675444
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States
Abstract
The thermal deformation requirement for wavefront preservation through an X-ray crystal monochromator is found to restrict the standard deviation of the height error to less than 25 pm under certain conditions. By optimizing effective cooling temperature of liquid nitrogen cooled crystals, combined with the compensation of second order component in thermal deformation, we have an approach to reach this unprecedented requirement. As an example, the criteria on thermal deformation of a high heat-load monochromator crystal for a LCLS-II-HE beamline can be achieved for 100 W FEL beam. Wavefront propagation simulations confirm that the reflected beam intensity profile is satisfactory.
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Lin Zhang, Matthew Seaberg, and Hasan Yavas "Towards wavefront preservation x-ray crystal monochromator for coherent light sources", Proc. SPIE PC12694, Advances in X-Ray/EUV Optics and Components XVIII, PC1269405 (4 October 2023); https://doi.org/10.1117/12.2675444
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KEYWORDS
X-rays
Crystals
Monochromators
Wavefronts
Light sources
Physical coherence
Coherent x-ray sources
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