Nonlinear Fluid Simulation Study of Stimulated Raman and Brillouin Scatterings in Shock Ignition
Abstract
We developed a new nonlinear fluid laser-plasma-instability code (FLAME) using a multi-fluid plasma model combined with full electromagnetic wave equations. The completed one-dimensional (1D) version of FLAME was used to study laser-plasma instabilities in shock ignition. The simulations results showed that absolute SRS modes growing near the quarter-critical surface were saturated by Langmuir-wave Decay Instabilities (LDI) and pump depletion. The ion-acoustic waves from LDI acted as seeds of stimulated Brillouin Scattering (SBS), which displayed a bursting pattern and caused strong pump depletion. Re-scattering of SRS at the 1/16th-critical surface was also observed in a high temperature case. These results largely agreed with corresponding Particle-in-Cell simulations.
Keywords
Cite
@article{arxiv.1703.10708,
title = {Nonlinear Fluid Simulation Study of Stimulated Raman and Brillouin Scatterings in Shock Ignition},
author = {L. Hao and R. Yan and J. Li and W. D. Liu and C. Ren},
journal= {arXiv preprint arXiv:1703.10708},
year = {2017}
}