Multiphase nonlinear electron plasma waves
Multiphase nonlinear electron plasma waves
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多相非线性电子等离子体波
DOI：
10.1103/physreve.106.055201
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发表时间：
2022
影响因子：
2.4
通讯作者：
Wurtele, Jonathan S.
中科院分区：
文献类型：
--
作者：
Munirov, Vadim R.;Friedland, Lazar;Wurtele, Jonathan S.
我们提出了一种方法来构建多相激励的一般不可积系统的温暖流体方程描述等离子体振荡。它是基于非线性电子等离子体波的自共振激发锁相与小振幅啁啾频率有质动力驱动器。我们通过对流体方程进行完全非线性的数值模拟来演示这些多相波的激发。我们开发了一个简化的模型的基础上，弱非线性分析理论，应用惠瑟姆的平均拉格朗日程序。简化模型的预测结果与热流体模拟的结果吻合得很好。这种自共振激发的多相波形成相干准晶结构，其可以潜在地用作等离子体光子或加速器件。最后，我们讨论了等离子体中非线性波自共振激发所需的激光参数。
We present a method for constructing multiphase excitations in the generally nonintegrable system of warm fluid equations describing plasma oscillations. It is based on autoresonant excitation of nonlinear electron plasma waves by phase locking with small amplitude chirped-frequency ponderomotive drives. We demonstrate the excitation of these multiphase waves by performing fully nonlinear numerical simulations of the fluid equations. We develop a simplified model based on a weakly nonlinear analytical theory by applying Whitham's averaged Lagrangian procedure. The simplified model predictions are in good agreement with the results from the warm fluid simulations. Such autoresonantly excited multiphase waves form coherent quasicrystalline structures, which can potentially be used as plasma photonic or accelerating devices. Finally, we discuss the laser parameters required for the autoresonant excitation of nonlinear waves in a plasma.