Nonlinear fluid simulation study of stimulated Raman and Brillouin scatterings in shock ignition

• DOI: 10.1063/1.4989702
• Publication Date: 2017-06-22T13:14:26Z
• Authors: L. Hao; R. Yan; J. Li; W. D. Liu; C. Ren
• Keywords: Plasma Physics (physics.plasm-ph); 0103 physical sciences; FOS: Physical sciences; 01 natural sciences; Physics - Plasma Physics

We developed a new nonlinear fluid laser-plasma-instability code (FLAME) using multi-fluid plasma model combined with full electromagnetic wave equations. The completed one-dimensional version of FLAME was used to study laser-plasma instabilities in shock ignition. simulations results showed that absolute stimulated Raman scattering (SRS) modes growing near the quarter-critical surface were saturated by Langmuir-wave Decay Instabilities (LDI) and pump depletion. ion-acoustic waves from LDI acted as seeds Stimulated Brillouin Scattering, which displayed bursting pattern caused strong Re-scattering SRS at 1/16th-critical also observed high temperature case. These largely agreed corresponding Particle-in-Cell simulations.