Interaction of a highly radiative shock with a solid obstacle

Journal article

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.

Authors: Koenig, M; Michel, T; Yurchak, R; Michaut, C; Albertazzi, B

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: American Institute of Physics
• Journal: Physics of Plasmas
• Volume: 24
• Issue: 8
• Pages: 082707
• Publication date: 2017-08-09
• Acceptance date: 2017-06-21
• DOI: 10.1063/1.4996010
• EISSN: 1089-7674
• ISSN: 1070-664X
• Keywords: radiative transfer; radiative shock; high-power laser; plasma; laboratory astrophysics; hydrodynamics