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LULI2000 - Enabling quantitative progresses in HED hydrodynamic instabilities and shocks experiments with advances x-ray diganostics (A. Casner)

The main objective of this pluri-annual project is to study the details of hydrodynamics instabilities and shocks in laser generated plasmas, by developing dedicated novel techniques of x-ray imaging. According to the complexity of the experiments and novelty of diagnostics, we would like a 3-years program that is mandatory to fulfil these new developments. In Year 1, and based on preliminary results, LiF based detector and Fresnel Zone Plates (FZP) will be optimized for the micrometric imaging of mixing zone in decelerating Rayleigh Taylor Instability experiments. In Year 2, we plan to develop a brand new technique (Talbot-Lau interferometry often used in medical applications) that can provide electron density gradients as well as additional simultaneous information such as attenuation, material composition (mixing diagnostic) and small-angle scatter. We plan therefore to determine an optimal configuration on pico2000 (grating survival, Talbot order and magnification checks), in order to acquire images of static samples and driven samples. In Year 3, such imaging system will then be applied to some of the most challenging problems in laser produced plasma field such as Rayleigh Taylor instabilities, shock waves, turbulent high Mach numbers flows and radiative shocks. Both the national and European context are very favourable to the development of x-ray micro-imaging platform using for example the new UHI lasers such as Apollon, PETAL or the future European XFEL in Hamburg. The proposed project will shed light on HED plasmas in the laboratory with unprecedented high spatial and temporal resolutions, enabling progress in the simulation and modelling of these complex regimes relevant for laboratory astrophysics.

LULI2000 - S49-50 / 2017