Langmuir wave filamentation instability
Langmuir wave filamentation instability
复制标题
DOI：
10.1063/1.2901197
复制
发表时间：
2007-10
影响因子：
2.2
通讯作者：
H. Rose;L. Yin
中科院分区：
文献类型：
--
作者：
H. Rose;L. Yin
建立了朗缪尔波(LW)模型，该模型的平衡点与受激拉曼散射最优化、哈密顿动力学和转动不变性一致。线性不稳定性分析包括波幅和涨落波数展开式中的所有阶项，δk。由此产生的LW调制不稳定性是非标准的：随着LW幅度的增加，不稳定的δk范围首先扩大，然后缩小到零。如果kλD<；0.45时，大振幅波动模型动力学需要超绕射项，以免人为的小尺度变得不稳定。
A Langmuir wave (LW) model is constructed whose equilibria are consistent with stimulated Raman scatter optimization, with Hamiltonian dynamics, and with rotational invariance. Linear instability analysis includes terms to all orders in wave amplitude and fluctuation wavenumber expansions, δk. Resultant LW modulational instability is nonstandard: As the LW amplitude increases, the unstable δk range first expands and then shrinks to zero. Large amplitude wave model dynamics requires hyperdiffraction terms if kλD<0.45, lest artificially small length scales become unstable.