Extended Data Fig. 1: Design of Wolter-III based AKB mirrors. | Nature Photonics

Extended Data Fig. 1: Design of Wolter-III based AKB mirrors.

From: Extreme focusing of hard X-ray free-electron laser pulses enables 7 nm focus width and 1022 W cm−2 intensity

Extended Data Fig. 1

(a) Cross-section of the Wolter-III based AKB mirrors designed for sub-10 nm focusing of XFEL. (b) Mirror shapes and radii of curvature of the designed four mirrors. (c) Lateral profiles of multilayer parameters: d-space, Pt-layer thickness, C-layer thickness, and γ parameter. (d) Reflectivities of the multilayers measured and calculated at a photon energy of 8.048 keV (Cu Kα). Results of the film thickness/roughness are summarized in inset tables.

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