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

Abstract : We experimentally investigate the fast(<1ps)isochoric heating of multi-layer metallic foils andsubsequent 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 thestreaked optical pyrometry of the target rear side. This is further characterized from benchmarkedsimulations of the laser-target interaction and the fast electron transport. Despite a modest laserenergy(<1J), the early-time high pressures and associated gradients launch inwards a strongcompression wave developing over10ps into a»140 Mbarblast wave, according to hydrodynamicsimulations, consistent with our measurements. These experimental and numericalfindings pave theway to a short-pulse-laser-based platform dedicated to high-energy-density physics studies.
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New Journal of Physics, Institute of Physics: Open Access Journals, 2017, 19 (10), 〈10.1088/1367-2630/aa806b〉
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https://hal-cea.archives-ouvertes.fr/cea-01668961
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Soumis le : mercredi 20 décembre 2017 - 14:12:54
Dernière modification le : jeudi 15 mars 2018 - 15:05:13

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S Santos, V Vauzour, M. Touati, L. Gremillet, F 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 (10), 〈10.1088/1367-2630/aa806b〉. 〈cea-01668961〉

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