Publikationsrepositorium - Helmholtz-Zentrum Dresden-Rossendorf

In this paper, we present recent results obtained on highly radiative shocks (RS) generated in a low-density gas filled cell obtained on the GEKKO XII laser facility. The RS was generated by using an ablator-pusher two-layer target (CH/Ti) and propagation media (Xe). High velocity RS have been generated (100-140 km/s) while limiting the preheating produced by the corona emission. Both self-emission and visible probe diagnostics highlighted a strong and anisotropic emission well ahead of the shock front. Its characteristics that depend on the initial conditions are described here as well as its interaction with an aluminium foil used as an obstacle. The obtained results are discussed showing a strong extension of the radiative precursor (1 mm) leading to an expansion of the obstacle at a velocity ≈ 6 km/s compatible to a 1-2 eV temperature.