Record Details

Title:
Imaging at an x-ray absorption edge using free electron laser pulses for interface dynamics in high energy density systems
Affiliation(s):
XFEL.EU staff, Other
Topic:
Scientific area:
Abstract:
Tuning the energy of an x-ray probe to an absorption line or edge can provide material-specific measurements that are particularly useful for interfaces. Simulated hard x-ray images above the Fe K-edge are presented to examine ion diffusion across an interface between $Fe_{2}O_{3}$ and $SiO_{2}$ aerogel foam materials. The simulations demonstrate the feasibility of such a technique for measurements of density scale lengths near the interface with submicron spatial resolution. A proof-of-principle experiment is designed and performed at the Linac coherent light source facility. Preliminary data show the change of the interface after shock compression and heating with simultaneous fluorescence spectra for temperature determination. The results provide the first demonstration of using x-ray imaging at an absorption edge as a diagnostic to detect ultrafast phenomena for interface physics in high-energy-density systems.
Imprint:
2017
Journal Information:
Review of Scientific Instruments, 88, 053501 (2017)
External related publications:
Language(s):
English
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