3 November 2004 Application of double-gradient multilayers for focusing
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We present the theoretical design, the fabrication, and the performance of double gradient multilayers to be installed on a Kirkpatrick-Baez focusing system for the ESRF bending magnet beam line BM5. The lateral and the depth gradient of the two coatings were chosen in such a way as to obtain a flat reflectivity response of about 25% after two reflections over an energy range from 12keV to 14keV and at an angle of incidence of 0.5deg at the mirror center. Both mirrors were coated with a non-periodic Ru/B4C structure containing 71 individual layers. The overall depth gradient was identical for both multilayers and optimized at the mirror center while the lateral gradient was adapted to the different focal lengths of each of the two KB elements.
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Christian Morawe, Christian Morawe, Christine Borel, Christine Borel, Eric Ziegler, Eric Ziegler, Jean-Christophe Peffen, Jean-Christophe Peffen, } "Application of double-gradient multilayers for focusing", Proc. SPIE 5537, X-Ray Sources and Optics, (3 November 2004); doi: 10.1117/12.555912; https://doi.org/10.1117/12.555912

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