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Modeling of laser–plasma interaction on hydrodynamic scales: Physics development and comparison with experiments

Published online by Cambridge University Press:  01 June 2004

S. WEBER ,
G. RIAZUELO ,
P. MICHEL ,
R. LOUBÈRE ,
F. WALRAET ,
V.T. TIKHONCHUK ,
V. MALKA ,
J. OVADIA  and
G. BONNAUD
S. WEBER
Affiliation:
Centre Lasers Intenses et Applications, Unité mixte de recherche 5107 Centre national de la recherche scientifique, Université Bordeaux 1, Commissariat à l'énergie atomique, Talence Cedex, France Département de Physique Théorique et Appliquée, Commissariat à l'énergie atomique/DIF, Bruyères-le-Châtel Cedex, France
G. RIAZUELO
Affiliation:
Département de Physique Théorique et Appliquée, Commissariat à l'énergie atomique/DIF, Bruyères-le-Châtel Cedex, France
P. MICHEL
Affiliation:
Département de Physique Théorique et Appliquée, Commissariat à l'énergie atomique/DIF, Bruyères-le-Châtel Cedex, France Laboratoire pour l'Utilisation des Lasers Intenses, Unité mixte de recherche 7605 Centre national de la recherche scientifique, École Polytechnique, Commissariat à l'énergie atomique, Université Paris VI, École Polytechnique, Palaiseau Cedex, France
R. LOUBÈRE
Affiliation:
Los Alamos National Laboratory, Group T-7, Los Alamos
F. WALRAET
Affiliation:
Département de Physique Théorique et Appliquée, Commissariat à l'énergie atomique/DIF, Bruyères-le-Châtel Cedex, France
V.T. TIKHONCHUK
Affiliation:
Centre Lasers Intenses et Applications, Unité mixte de recherche 5107 Centre national de la recherche scientifique, Université Bordeaux 1, Commissariat à l'énergie atomique, Talence Cedex, France
V. MALKA
Affiliation:
Laboratoire d'Optique Appliquée, Ecole Nationale Supérieure des Techniques Avancées, Centre national de la recherche scientifique, Unité mixte de recherche 7639, Palaiseau, France
J. OVADIA
Affiliation:
Commissariat à l'énergie atomique/DAM/CESTA/DEV/SIS, Le Barp, France
G. BONNAUD
Affiliation:
Commissariat à l'énergie atomique/DSE, Paris, France
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Abstract

The forthcoming laser installations related to inertial confinement fusion, Laser Mégajoule (LMJ) (France) and National Ignition Facility (NIF) (USA), require multidimensional numerical simulation tools for interpreting current experimental data and to perform predictive modeling for future experiments. Simulations of macroscopic plasma volumes of the order of 1 mm3 and laser exposure times of the order of hundreds of picoseconds are necessary. We present recent developments in the PARAX code towards this goal. The laser field is treated in a standard paraxial approximation in three dimensions. The plasma response is described by single-fluid, two-temperature, fully nonlinear hydrodynamical equations in the plane transverse to the laser propagation axis. The code also accounts for the dominant nonlocal transport terms in spectral form originating from a linearized solution to the Fokker–Planck equation. The simulations of interest are hohlraum plasmas in the case of indirect drive or the plasma corona for direct drive. Recent experimental results on plasma-induced smoothing of RPP laser beams are used to validate the code.

Keywords

ICF plasmasLaser–plasma interactionNonlocal transportPlasma-induced smoothingTransport modeling of plasmas
Type
Research Article
Information
Laser and Particle Beams , Volume 22 , Issue 2 , June 2004 , pp. 189 - 195
Copyright
© 2004 Cambridge University Press

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