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Highly radiative shock experiments driven by GEKKO XII |
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| Authors: | A Dizi??re C Michaut M Koenig C D Gregory A Ravasio Y Sakawa Y Kuramitsu T Morita T Ide H Tanji H Takabe P Barroso J-M Boudenne |
| Institution: | 1. LULI, Ecole Polytechnique, CNRS, Universit?? Paris 6, 91128, Palaiseau, France 2. LUTH, Observatoire de Paris, CNRS, Universit?? Paris-Diderot, 92190, Meudon, France 3. Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, 565-0871, Japan 4. GEPI, Observatoire de Paris, CNRS, Universit?? Paris-Diderot, 92190, Meudon, France |
| Abstract: | In this paper, recent results obtained on highly radiative shocks generated in a xenon filled gas cell using the GEKKO XII laser facility are presented. Data show extremely high shock velocity (??150 km/s) never achieved before in gas. Preliminary analyses based on theoretical dimensionless numbers and numerical simulations suggest that these radiative shocks reach a new radiative regime where the radiative pressure plays a role in the dynamics and structure of the shock. A major effect observed is a strong anisotropic emission in the downstream gas. This unexpected feature is discussed and compared to available 2D radiation hydrodynamic simulations. |
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