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Isochoric heating and strong blast wave formation driven by fast electrons in solid-density targets

J J Santos 1, * B Vauzour 1, 2 M. Touati 1 L. Gremillet 2 J-L Feugeas 1 T. Ceccotti 3, 4 R Bouillaud 1 F Deneuville 1 V Floquet 3, 4 C Fourment 1 M Hadj-Bachir 1 S. Hulin 1 A Morace 5 P. Nicolai 1 P. D’oliveira 3, 6 F. Reau 3, 4 A Samaké 1 O. Tcherbakoff 3, 6 V T Tikhonchuk 1 M. Veltcheva 5, 7 D. Batani 1, 5 
* Corresponding author
4 PHI - Physique à Haute Intensité
IRAMIS - Institut Rayonnement Matière de Saclay, LIDyl - Laboratoire Interactions, Dynamiques et Lasers (ex SPAM)
6 SLIC - Serveurs Laser
IRAMIS - Institut Rayonnement Matière de Saclay, LIDyl - Laboratoire Interactions, Dynamiques et Lasers (ex SPAM)
Abstract : We experimentally investigate the fast ($<1$ ps) isochoric heating of multi-layer metallic foils and subsequent high-pressure hydrodynamics induced by energetic electrons driven by high-intensity, high-contrast laser pulses. The early-time temperature profile inside the target is measured from the streaked optical pyrometry of the target rear side. This is further characterized from benchmarked simulations of the laser-target interaction and the fast electron transport. Despite a modest laser energy ($<1$ J), the early-time high pressures and associated gradients launch inwards a strong compression wave developing over ${>\atop\sim}$10 ps into a $\approx$ 140 Mbar blast wave, according to hydrodynamic simulations, consistent with our measurements. These experimental and numerical findings pave the way to a short-pulse-laser-based platform dedicated to high-energy-density physics studies.
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J J Santos, B Vauzour, M. Touati, L. Gremillet, J-L Feugeas, et al.. Isochoric heating and strong blast wave formation driven by fast electrons in solid-density targets. New Journal of Physics, Institute of Physics: Open Access Journals, 2017, 19, pp.103005. ⟨10.1088/1367-2630/aa806b⟩. ⟨cea-01668961⟩

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