title: Framework for three-dimensional coherent diffraction imaging by focused beam x-ray Bragg ptychography.
abstract: We present the framework for convergent beam Bragg ptychography, and, using simulations, we demonstrate that nanocrystals can be ptychographically reconstructed from highly convergent x-ray Bragg diffraction. The ptychographic iterative engine is extended to three dimensions and shown to successfully reconstruct a simulated nanocrystal using overlapping raster scans with a defocused curved beam, the diameter of which matches the crystal size. This object reconstruction strategy can serve as the basis for coherent diffraction imaging experiments at coherent scanning nanoprobe x-ray sources.
authors.affiliation: Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439, USA. shrus@anl.gov
authors.forename: Stephan O
authors.initials: SO
authors.lastname: Hruszkewycz
authors.forename: Martin V
authors.initials: MV
authors.lastname: Holt
authors.forename: Ash
authors.initials: A
authors.lastname: Tripathi
authors.forename: Jörg
authors.initials: J
authors.lastname: Maser
authors.forename: Paul H
authors.initials: PH
authors.lastname: Fuoss