Abstract
We propose an extended X-ray adaptive zoom condenser that can form an intermediate virtual focus. The system comprises two deformable mirrors for focusing within a single dimension and can vary its numerical aperture (NA) without changing the positions of the light source, mirrors, or final focus. The desired system NA is achieved simply by controlling the mirror surfaces, which enables conversion between convex and concave forms, by varying the position of the intermediate virtual focus. A feasibility test at SPring-8 under a photon energy of 10 keV demonstrated that the beam size can be varied between 134 and 1010 nm.
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