3 October 2014 Saw-tooth refractive lens for high energy x-ray focusing
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Saw-tooth refractive lens (SRL) provides a comparatively attractive option for X-ray focusing. An SRL assembly consists of two parts, each with an array of triangular structures (prisms), set tilted symmetrically with respect to the incoming beam. Its main advantage is a simple, continuous tunability in energy and focal length. SRLs can be used for both long and short focal length focusing. Long focal distance focusing of an SRL can accurately be predicted using simple analytical relations. However, the focus size at short focal distances focusing may deviate appreciably from the expected demagnified source size when: (1) the length of the SRL is comparable with the focusing distance, (2) the incident beam is not monochromatic, and (3) and the distance between adjacent prism tips, the tip step, is large . The first factor was considered in a previous work while the other two are addressed is this paper. This preliminary work is aimed at a better understanding of the SRL lenses for focusing an undulator beamline at the Advanced Photon Source (APS).
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Mikhail A. Antimonov, Mikhail A. Antimonov, Ali M. Khounsary, Ali M. Khounsary, "Saw-tooth refractive lens for high energy x-ray focusing", Proc. SPIE 9207, Advances in X-Ray/EUV Optics and Components IX, 92070Z (3 October 2014); doi: 10.1117/12.2063294; https://doi.org/10.1117/12.2063294

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