Dynamics and stability of radiation-driven double ablation front structures

Drean, V.; Olazabal-Loumé, M.; Sanz, J.; Tikhonchuk, V. T.
December 2010
Physics of Plasmas;Dec2010, Vol. 17 Issue 12, p122701
Academic Journal
The dynamics of double ablation front (DAF) structures is studied for planar targets with moderate atomic number ablators. These structures are obtained in hydrodynamic simulations for various materials and laser intensities and are qualitatively characterized during the acceleration stage of the target. The importance of the radiative transport for the DAF dynamics is then demonstrated. Simulated hydrodynamic profiles are compared with a theoretical model, showing the consistency of the model and the relevant parameters for the dynamics description. The stability of DAF structures with respect to two-dimensional perturbations is studied using two different approaches: one considers the assumptions of the theoretical model and the other one a more complete physics. The numerical simulations performed with both approaches demonstrate good agreement of dispersion curves.


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