title: Utilizing broadband X-rays in a Bragg coherent X-ray diffraction imaging experiment.
abstract: A method is presented to simplify Bragg coherent X-ray diffraction imaging studies of complex heterogeneous crystalline materials with a two-stage screening/imaging process that utilizes polychromatic and monochromatic coherent X-rays and is compatible with in situ sample environments. Coherent white-beam diffraction is used to identify an individual crystal particle or grain that displays desired properties within a larger population. A three-dimensional reciprocal-space map suitable for diffraction imaging is then measured for the Bragg peak of interest using a monochromatic beam energy scan that requires no sample motion, thus simplifying in situ chamber design. This approach was demonstrated with Au nanoparticles and will enable, for example, individual grains in a polycrystalline material of specific orientation to be selected, then imaged in three dimensions while under load.
authors: Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA.
authors: Wonsuk
authors: W
authors: Cha
authors: X-ray Science Division, Argonne National Laboratory, Argonne, IL 60439, USA.
authors: Wenjun
authors: W
authors: Liu
authors: X-ray Science Division, Argonne National Laboratory, Argonne, IL 60439, USA.
authors: Ross
authors: R
authors: Harder
authors: X-ray Science Division, Argonne National Laboratory, Argonne, IL 60439, USA.
authors: Ruqing
authors: R
authors: Xu
authors: Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA.
authors: Paul H
authors: PH
authors: Fuoss
authors: Materials Science Division, Argonne National Laboratory, Argonne, IL 60439, USA.
authors: Stephan O
authors: SO
authors: Hruszkewycz
keywords: coherent X-ray diffraction imaging; materials characterization; polychromatic X-ray diffraction