title: Gas gun shock experiments with single-pulse x-ray phase contrast imaging and diffraction at the Advanced Photon Source.
abstract: The highly transient nature of shock loading and pronounced microstructure effects on dynamic materials response call for in situ, temporally and spatially resolved, x-ray-based diagnostics. Third-generation synchrotron x-ray sources are advantageous for x-ray phase contrast imaging (PCI) and diffraction under dynamic loading, due to their high photon fluxes, high coherency, and high pulse repetition rates. The feasibility of bulk-scale gas gun shock experiments with dynamic x-ray PCI and diffraction measurements was investigated at the beamline 32ID-B of the Advanced Photon Source. The x-ray beam characteristics, experimental setup, x-ray diagnostics, and static and dynamic test results are described. We demonstrate ultrafast, multiframe, single-pulse PCI measurements with unprecedented temporal (<100 ps) and spatial (∼2 μm) resolutions for bulk-scale shock experiments, as well as single-pulse dynamic Laue diffraction. The results not only substantiate the potential of synchrotron-based experiments for addressing a variety of shock physics problems, but also allow us to identify the technical challenges related to image detection, x-ray source, and dynamic loading.
authors.affiliation: Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA. sluo@lanl.gov
authors.forename: S N
authors.initials: SN
authors.lastname: Luo
authors.forename: B J
authors.initials: BJ
authors.lastname: Jensen
authors.forename: D E
authors.initials: DE
authors.lastname: Hooks
authors.forename: K
authors.initials: K
authors.lastname: Fezzaa
authors.forename: K J
authors.initials: KJ
authors.lastname: Ramos
authors.forename: J D
authors.initials: JD
authors.lastname: Yeager
authors.forename: K
authors.initials: K
authors.lastname: Kwiatkowski
authors.forename: T
authors.initials: T
authors.lastname: Shimada