Imaging at an x-ray absorption edge using free electron laser pulses for interface dynamics in high energy density systems [Resonant phase contrast imaging for interface physics]
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)
- SLAC National Accelerator Lab., Menlo Park, CA (United States)
- European XFEL, Schenefeld (Germany)
- Gwangju Institute of Science and Technology, Gwangju (South Korea)
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 Fe2O3 and SiO2 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. Here, 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.
- Research Organization:
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States); Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Organization:
- USDOE National Nuclear Security Administration (NNSA)
- Grant/Contract Number:
- AC02-76SF00515; 05K13OD2; 2016R1A2B4009631; SCHR 1137/1-1; ECRP; SF00515; 14-SI-003; AC52-07NA27344
- OSTI ID:
- 1361852
- Alternate ID(s):
- OSTI ID: 1369466; OSTI ID: 1421015; OSTI ID: 1466912
- Report Number(s):
- LLNL-JRNL-700431; RSINAK
- Journal Information:
- Review of Scientific Instruments, Vol. 88, Issue 5; ISSN 0034-6748
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Fifth User Workshop on high-power lasers at the Linac Coherent Light Source
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journal | September 2018 |
Ultrafast magnetodynamics with free-electron lasers
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journal | January 2018 |
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