Nonlinear evolution of stimulated Raman scattering near the quarter-critical density
作者： C. Z. Xiao , Z. J. Liu , D. Wu , C. Y. Zheng , X. T. He
DOI: 10.1063/1.4921644
关键词: Absorption (electromagnetic radiation) 、 Physics 、 Instability 、 Trapping 、 Plasma 、 Atomic physics 、 Raman scattering 、 Nonlinear system 、 Reflection (mathematics) 、 Plasmon
摘要: Nonlinear evolution of stimulated Raman scattering (SRS) near the quarter-critical density is studied using one-dimensional (1D) and two-dimensional (2D) particle-in-cell simulations in homogeneous plasmas. In 1D configuration, with two-plasmon decay (TPD) instability excluded, system evolves into two regimes distinguished by whether cavities have been formed or not. At low temperatures, a cavity regime characterised high absorption reflection, at temperatures nonlinear frequency shift due to particle trapping, are observed. Furthermore, competition between SRS TPD 2D reveals that does play significant role density, whose influences were mostly neglected before.
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