Theoretical analysis and optimization of highly efficient multilayer-coated blazed gratings with high fix-focus constant for the tender X-ray region

The problem of X-ray diffraction from multilayer-coated blazed diffraction gratings is analyzed. Invalidity of the conventional condition of maximal diffraction efficiency observed in previous experiments is explained theoretically. This is attributed to two factors: contribution of anti-blaze facet...

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Veröffentlicht in:Optics express 2020-01, Vol.28 (2), p.821-845
Hauptverfasser: Huang, Qiushi, Kozhevnikov, Igor V, Sokolov, Andrey, Zhuang, Yeqi, Li, Tongzhou, Feng, Jiangtao, Siewert, Frank, Viefhaus, Jens, Zhang, Zhong, Wang, Zhanshan
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Sprache:eng
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Zusammenfassung:The problem of X-ray diffraction from multilayer-coated blazed diffraction gratings is analyzed. Invalidity of the conventional condition of maximal diffraction efficiency observed in previous experiments is explained theoretically. This is attributed to two factors: contribution of anti-blaze facets to diffraction efficiency and effect of strongly asymmetric diffraction. We demonstrate that a proper choice of the multilayer d-spacing allows to design grating with the diffraction efficiency close to the maximal possible one throughout the tender X-ray range (E∼1-5 keV). An optimization procedure is suggested for the first time to choose the optimal grating parameters and the operation diffraction order to obtain a high fix-focus constant and high diffraction efficiency simultaneously in a wide spectral range.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.28.000821