In this paper, we present the recent results obtained regarding highly radiative shocks (RSs) generated in a low-density gas filled cell on the GEKKO XII laser facility. The RS was generated by using an ablator-pusher two-layer target (CH/Sn) and a propagation medium (Xe). High velocity RSs have been generated (100–140 km/s), while limiting as much as possible the preheating produced by the corona emission. Both self-emission and visible probe diagnostics highlighted a strong emission in the shock and an electron density in the downstream gas. The RS characteristics that depend on the initial conditions are described here as well as its precursor interaction with an aluminium foil used as an obstacle. The obtained results are discussed which show a strong extension of the radiative precursor (1 mm) leading to an expansion velocity of the obstacle up to ≈30 km/s compatible to a 20 eV temperature.
Interaction of a highly radiative shock with a solid obstacle
Note: Paper submitted as part of the High Energy Density Laboratory Astrophysics (Guest Editor: Siegfried Glenzer). The conference was held at the SLAC National Accelerator Laboratory, Menlo Park, California, 16–20 May 2016.
M. Koenig, Th. Michel, R. Yurchak, C. Michaut, B. Albertazzi, S. Laffite, E. Falize, L. Van Box Som, Y. Sakawa, T. Sano, Y. Hara, T. Morita, Y. Kuramitsu, P. Barroso, A. Pelka, G. Gregori, R. Kodama, N. Ozaki, D. Lamb, P. Tzeferacos; Interaction of a highly radiative shock with a solid obstacle. Phys. Plasmas 1 August 2017; 24 (8): 082707. https://doi.org/10.1063/1.4996010
Download citation file: