Coupled hydrodynamic model for laser-plasma interaction and hot electron generation

被引：51

作者：

Colaitis, A. ^{[1
]}

Duchateau, G. ^{[1
]}

Ribeyre, X. ^{[1
]}

Maheut, Y. ^{[1
]}

Boutoux, G. ^{[1
]}

Antonelli, L. ^{[2
,3
]}

Nicolai, Ph. ^{[1
]}

Batani, D. ^{[1
]}

Tikhonchuk, V. ^{[1
]}

机构：

[1] Univ Bordeaux, CNRS, CEA, Ctr Lasers Intenses & Applicat,UMR 5107, F-33400 Talence, France

[2] Univ Roma La Sapienza, Dipartimento SBAI, I-00161 Rome, Italy

[3] Univ Roma Tor Vergata, Dipartimento Ingn Ind, I-00133 Rome, Italy

来源：

PHYSICAL REVIEW E | 2015年 / 92卷 / 04期

关键词：

STIMULATED RAMAN-SCATTERING; MU-M LASER; PARAMETRIC-INSTABILITIES; INHOMOGENEOUS PLASMAS; VARIATIONAL APPROACH; SIMULATION; TARGETS; ABSORPTION; TRANSPORT; SYSTEM;

D O I：

10.1103/PhysRevE.92.041101

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

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 highenergy 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.

引用

页数：5

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