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Study of stimulated Raman and Brillouin scattering in a finite interaction region under the convective instability condition

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分类：TN253[电子电信—物理电子学] O241.82[理学—计算数学;理学—数学]
作者机构：[1]Institute of Applied Physics and Computational Mathematics, Beijing 100094, China, [2]Center for Applied Physics and Technology, Peking University, Beijing 100871, China, [3]Graduate School of China Academy of Engineering Physics, Beijing 100088, China
相关基金：supported by Science and Technology Funds of CAEP（2010B0102018and2010A0102004）;the National Natural Science Foundation of China（11147141,11175029,11075025,10975023,10935003）

作者： HAO Liang[1], LIU ZhanJu[1], ZHENG ChunYang[1,2], XIANG Jiang[1], FENG Wu[3], HU XiaoYan[1], LI Bin[1]

关键词：受激拉曼散射, 稳定条件, 对流, 受激布里渊散射, 等离子体密度, 线性理论, 相互作用, 计算结果, stimulated Raman scattering, stimulated Brillouin scattering, three-wave interaction model

中文摘要：

我们与一个一个维的三波浪的相互作用(3WI ) 在对流不稳定性条件下面讨论散布的刺激拉曼(SRS ) 和散布的刺激 Brillouin (SBS ) 模型。用线性理论，我们在一个有限相互作用区域推出向后散布的波浪的时间的生长率，获得代表，和反射率。我们发现生长率由激光紧张和血浆密度和温度是坚定的不仅，而且与空间获得有关。相互作用区域的长度对获得代表和 backscattering 水平重要。我们基于 3WI 方程模仿 SRS 和 SBS 的开发和进化。我们的数字结果与线性理论在于。

英文摘要：

We discuss stimulated Raman scattering （SRS） and stimulated Brillouin scattering （SBS） under the convective instability condition with a one-dimensional three-wave interaction （3WI） model.Using linear theory,we deduce the temporal growth rate,gain exponent,and reflectivity of the backward scattered wave in a finite interaction region.We find that the growth rate is not only determined by the laser intensity and plasma density and temperature,but also related to the spatial gain.The length of the interaction region is important to the gain exponent and backscattering level.We simulate the developments and evolutions of SRS and SBS based on the 3WI equations.Our numerical results consist with the linear theory.