Isochoric heating and strong blast wave formation driven by fast electrons in solid-density targets
Résumé
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.
Origine : Publication financée par une institution
Loading...
