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Turbulent Hydrodynamics experiments in High Energy Desnity Plasmas – TurbOHEDP

Submission summary

The physics of compressible turbulence in High Energy Density (HED) laser plasmas is an unchartered experimental area. Simulations of compressible and radiative flows relevant for astrophysics rely mainly on subscale parameters. In this project, we plan to explore turbulent hydrodynamics plasma both experimentally and numerically in order to improve our understanding of such important phenomena for interest of both communities: laser plasma physics and astrophysics. We will focus on the physics of Supernovae Remnants (SNRs) which are complex structures subject to fluid instabilities such as the Rayleigh-Taylor and Kelvin-Helmholtz instabilities. The advent of the Laser Megajoule (LMJ) creates novel opportunities in laboratory astrophysics, as it provides a unique platform to study turbulent mixing flows in HED plasmas. Indeed, this physics requires accelerating targets over large distances and long time periods that no other facilities in Europe can provide. In a preparatory phase, scaling from experiments at lower laser energies will be used to guarantee the performance of future LMJ experiments. This subscale experiments will allow us to develop skills and tools in this new field, which are a corner stone to achieve our objectives on LMJ. This program includes several milestones: first designing the experimental platform at a small scale compared to LMJ, developing new diagnostic capabilities such as high spatial resolution x-ray imaging systems, proton radiography and x-ray Thomson scattering. At the same time we will put a strong effort in theoretical analysis and associated simulations tools that are not yet available to interpret such experiments. In particular, we will build our project on a synergy between the laboratory astrophysics experiments and post-processed simulations and their equivalent at a larger scale (to be defined within this project through scaling laws) in astrophysics. Finally, the TurbOHEDP project will shed light on turbulent HED plasmas in the laboratory, enabling progress in the simulation and modelling of these complex flows in the conditions relevant for astrophysics.

Project coordination

Alexis CASNER (Commissariat à l'énergie atomique et aux énergies alternatives)

The author of this summary is the project coordinator, who is responsible for the content of this summary. The ANR declines any responsibility as for its contents.

Partner

CELIA CELIA
U. Chicago Flash Center
CNRS DR ILE DE FRANCE SUD
CNRS LULI
CEA Commissariat à l'énergie atomique et aux énergies alternatives

Help of the ANR 516,932 euros
Beginning and duration of the scientific project: January 2016 - 48 Months

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