Developing x-ray Fresnel Diffractive-Refractive Radiography for Measuring Mutual Diffusion in Warm Dense Matter
Abstract
The experimental measurement of concentration-driven diffusion between two species in warm dense matter (WDM) is important for modeling the structure of Jovian planets and for simulating instability growth in inertial confinement fusion (ICF) experiments. We are developing x-ray Fresnel diffractive-refractive radiography (FDR) for use at the NIF and the OMEGA laser facility, which combines ultra-small source size (1 μm slits) with a thin cylindrical sample (d <10 μm) that will be isochorically heated to ~10 eV. Measurements are sensitive to Fresnel diffraction signatures, and can resolve density gradient changes with sub - 1 - μm resolution. We will discuss results from the first OMEGA experiments and experimental design plans for NIF experiments.
This material is partially based upon work supported by the U.S. Department of Energy, Office of Science, Office of Fusion Energy Science under Award Number de-sc0019268. The work of A.S., Y.P., O.L., L.D., and T.D. was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.- Publication:
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APS Division of Plasma Physics Meeting Abstracts
- Pub Date:
- 2020
- Bibcode:
- 2020APS..DPPN05004A