J. Phys. IV France
Volume 133, June 2006
Page(s) 111 - 115
Publié en ligne 16 juin 2006
Inertial Fusion Sciences and Applications 2005
J.-C. Gauthier, et al.
J. Phys. IV France 133 (2006) 111-115

DOI: 10.1051/jp4:2006133022

Linear perturbation amplification in ICF self-similar ablation flows

J.-M. Clarisse1, C. Boudesocque-Dubois1, S. Gauthier1 and F. Abéguilé2

1  CEA/Bruyères le Châtel, BP. 12, 91680 Bruyères le Châtel, France
2  Formerly at CPhT, École Polytechnique, 91128 Palaiseau, France

Exact similarity solutions for inviscid compressible ablative flows in slab symmetry with nonlinear heat conduction are proposed for studying unsteady and compressible effects on the hydrodynamic stability of ablation fronts relevant to inertial confinement fusion (ICF). These similarity solutions and their linear perturbations are computed numerically using a dynamical multidomain Chebyshev pseudo-spectral method. Linear perturbation results obtained for the laser-imprint problem show then that maximum amplification occurs for laser-intensity modulations of vanishing wavenumbers.

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