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. 2020 May 29;10:8772. doi: 10.1038/s41598-020-65225-4

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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(a) The Si(311) and (b) Si(111) diffracted Laue beams with a 50 μm Ag foil in the beam. The diffraction order can be switched by simply rotating the Laue crystal. The total energy gradient range corresponds to the colored regions in the inset of Fig. 2b. The CCD camera can cover the whole Laue diffracted beam, which has an elliptical shape with an energy gradient encoded along the horizontal direction and spatial information at same energy encoded along the vertical direction. A strongly absorbing metal bar (Ø = 1.5 mm) was fixed together with the sample for alignment. The non-parallel absorption fringes are due to non-ideal bending of the crystal.