title: Coupled hydrodynamic model for laser-plasma interaction and hot electron generation.
abstract: We present a formulation of the model of laser-plasma interaction (LPI) at hydrodynamical scales that couples the plasma dynamics with linear and nonlinear LPI processes, including the creation and propagation of high-energy electrons excited by parametric instabilities and collective effects. This formulation accounts for laser beam refraction and diffraction, energy absorption due to collisional and resonant processes, and hot electron generation due to the stimulated Raman scattering, two-plasmon decay, and resonant absorption processes. Hot electron (HE) transport and absorption are described within the multigroup angular scattering approximation, adapted for transversally Gaussian electron beams. This multiscale inline LPI-HE model is used to interpret several shock ignition experiments, highlighting the importance of target preheating by HEs and the shortcomings of standard geometrical optics when modeling the propagation and absorption of intense laser pulses. It is found that HEs from parametric instabilities significantly increase the shock pressure and velocity in the target, while decreasing its strength and the overall ablation pressure.
authors.affiliation: Université de Bordeaux-CNRS-CEA, Centre Lasers Intenses et Applications, UMR 5107, 351 Cours de la Libération, 33400 Talence, France.
authors.forename: A
authors.initials: A
authors.lastname: Colaïtis
authors.affiliation: Université de Bordeaux-CNRS-CEA, Centre Lasers Intenses et Applications, UMR 5107, 351 Cours de la Libération, 33400 Talence, France.
authors.forename: G
authors.initials: G
authors.lastname: Duchateau
authors.affiliation: Université de Bordeaux-CNRS-CEA, Centre Lasers Intenses et Applications, UMR 5107, 351 Cours de la Libération, 33400 Talence, France.
authors.forename: X
authors.initials: X
authors.lastname: Ribeyre
authors.affiliation: Université de Bordeaux-CNRS-CEA, Centre Lasers Intenses et Applications, UMR 5107, 351 Cours de la Libération, 33400 Talence, France.
authors.forename: Y
authors.initials: Y
authors.lastname: Maheut
authors.affiliation: Université de Bordeaux-CNRS-CEA, Centre Lasers Intenses et Applications, UMR 5107, 351 Cours de la Libération, 33400 Talence, France.
authors.forename: G
authors.initials: G
authors.lastname: Boutoux
authors.affiliation: Dipartimento SBAI, Università degli Studi di Roma "La Sapienza," Via Antonio Scarpa, 14, 00161 Rome, Italy.|Università di Roma "Tor Vergata," Dipartimento di Ingegneria Industriale, Via del Politecnico 1, 00133 Rome, Italy.
authors.forename: L
authors.initials: L
authors.lastname: Antonelli
authors.affiliation: Université de Bordeaux-CNRS-CEA, Centre Lasers Intenses et Applications, UMR 5107, 351 Cours de la Libération, 33400 Talence, France.
authors.forename: Ph
authors.initials: P
authors.lastname: Nicolaï
authors.affiliation: Université de Bordeaux-CNRS-CEA, Centre Lasers Intenses et Applications, UMR 5107, 351 Cours de la Libération, 33400 Talence, France.
authors.forename: D
authors.initials: D
authors.lastname: Batani
authors.affiliation: Université de Bordeaux-CNRS-CEA, Centre Lasers Intenses et Applications, UMR 5107, 351 Cours de la Libération, 33400 Talence, France.
authors.forename: V
authors.initials: V
authors.lastname: Tikhonchuk