Theory and numerical simulations of x-ray nanofocusing by bent crystal in back diffraction geometry

Alexey Suvorov; Haruhiko Ohashi; Shunji Goto; Tetsuya Ishikawa

doi:10.1117/12.894369

23 September 2011 Theory and numerical simulations of x-ray nanofocusing by bent crystal in back diffraction geometry

Alexey Suvorov, Haruhiko Ohashi, Shunji Goto, Tetsuya Ishikawa

Proceedings Volume 8141, Advances in Computational Methods for X-Ray Optics II; 81410S (2011) https://doi.org/10.1117/12.894369
Event: SPIE Optical Engineering + Applications, 2011, San Diego, California, United States

Abstract

A point-to-point x-ray focusing of a spherical wave by means of cylindrically bent crystal in symmetric Bragg back diffraction geometry was investigated theoretically and simulated numerically. To separate the focal plane from an incident x-ray beam, a thin flat crystal was introduced into the setup. The effect of flat crystal diffraction on the focusing performance of the double crystal setup is discussed. It is shown that the aberration free focusing can be achieved with aspherical surface shape of the strongly bent crystal. A correction term for the surface displacement function free from spherical aberrations is derived. Thorough numerical simulations demonstrated agreement with the theoretical analysis and excellent focusing performance of 2.4 nm. Theoretically, the demonstrated result can be further improved almost by an order of magnitude.

Citation Download Citation

Alexey Suvorov, Haruhiko Ohashi, Shunji Goto, and Tetsuya Ishikawa "Theory and numerical simulations of x-ray nanofocusing by bent crystal in back diffraction geometry", Proc. SPIE 8141, Advances in Computational Methods for X-Ray Optics II, 81410S (23 September 2011); https://doi.org/10.1117/12.894369

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