Three dimensional variable-wavelength x-ray Bragg coherent diffraction imaging

Abstract : We present and demonstrate a formalism by which three dimensional (3D) Bragg x-ray coherent diffraction imaging (BCDI) can be implemented without moving the sample by scanning the energy of the incident x-ray beam. This capability is made possible by introducing a 3D Fourier transform that accounts for x-ray wavelength variability. We demonstrate the approach by inverting coherent Bragg diffraction patterns from a gold nanocrystal measured with an x-ray energy scan. Variable-wavelength BCDI will expand the breadth of feasible in situ 3D strain imaging experiments towards more diverse materials environments, especially where sample manipulation is difficult.
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Submitted on : Tuesday, November 29, 2016 - 6:18:01 PM
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W. Cha, A. Ulvestad, Marc Allain, Virginie Chamard, R. Harder, et al.. Three dimensional variable-wavelength x-ray Bragg coherent diffraction imaging. Physical Review Letters, American Physical Society, 2016, 117, pp.225501. ⟨10.1103/PhysRevLett.117.225501⟩. ⟨hal-01397101⟩



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