Examining Material Response Using X-Ray Phase Contrast Imaging
Propagation based X-ray phase contrast imaging (PCI) offers unique opportunities for ultrafast, high-resolution measurements to examine dynamic materials response at extreme conditions. Within the past decade, efforts on the IMPULSE system at the Advanced Photon Source included the development of a novel Multi-frame X-ray PCI (MPCI) system that was used to obtain the first shock-movies to examine material deformation with micron spatial resolution on nanosecond timescale. The MPCI system has been systematically developed over the years to improve optical efficiencies, spatial resolution, obtain more images per experiment, and to develop a dual-imaging, dual-zoom feature useful for many applications. With the MPCI system, X-ray PCI has been successfully used to study a wide range of phenomena including jet-formation in metals, crack nucleation and propagation, response of additively manufactured materials, and detonator dynamics to name a few. In this paper, a brief overview of the MPCI system development is provided along with its application to study shock propagation in materials.
KeywordsPCI phase contrast imaging x-ray imaging shock compression matter at extremes
This work was performed by Los Alamos National Laboratory (LANL) at Los Alamos and at the Dynamic Compression Sector (DCS) at the Advanced Photon Source (APS). All x-ray phase contrast images shown here were obtained using LANL’s multi-frame x-ray phase contrast imaging system (MPCI) developed on the IMPULSE capability at APS. Chuck Owens, Joe Rivera, and John Wright (LANL) are thanked for sample assembly, experiment preparation and execution. Nick Sinclair and Adam Schuman (DCS/WSU) are thanked for their technical support at the Sector 35 beamline setting up the X-ray beam. The authors gratefully acknowledge the financial support provided by Science Campaigns, Joint Munitions Program (JMP), and National Security Technologies (NSTec) Shock Wave Physics Related Diagnostic (SWRD) program. LANL is operated by Los Alamos National Security, LLC for the U.S. Department of Energy (DOE) under Contract No. DE-AC52-06NA25396. DCS is supported by the Department of Energy (DOE), National Nuclear Security Administration, under Award Number DE-NA0002442 and operated by Washington State University (WSU). This research used resources of APS, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under Contract No. DE-AC02-06CH11357.
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