Electromagnetic rogue waves in beam–plasma interactions
Electromagnetic rogue waves in beam–plasma interactions
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DOI：
10.1088/2040-8978/15/6/064003
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发表时间：
2013-06
影响因子：
2.1
通讯作者：
G. P. Veldes;J. Borhanian;M. McKerr;V. Saxena;D. Frantzeskakis;I. Kourakis
中科院分区：
文献类型：
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作者：
G. P. Veldes;J. Borhanian;M. McKerr;V. Saxena;D. Frantzeskakis;I. Kourakis
从第一性原理出发，研究了电磁脉冲传播与等离子体相互作用过程中产生的反常波。采用多尺度方法求解描述磁化等离子体中弱非线性圆极化电磁脉冲的流体麦克斯韦方程组。一个非线性薛定谔（NLS）型方程的矢量势的振幅。NLS方程的一组非定常包络解被认为是模拟束-等离子体相互作用中的异常波（畸形波）的潜在候选者，即以Peregrine孤子，Akhmediev呼吸子和Kuznetsov-Ma呼吸子的形式。后者的结构与相关的等离子体参数的结构特性的变化进行了研究，特别是专注于（磁场依赖）回旋（陀螺仪）频率和等离子体频率之间的比率。
The occurrence of rogue waves (freak waves) associated with electromagnetic pulse propagation interacting with a plasma is investigated, from first principles. A multiscale technique is employed to solve the fluid Maxwell equations describing weakly nonlinear circularly polarized electromagnetic pulses in magnetized plasmas. A nonlinear Schrödinger (NLS) type equation is shown to govern the amplitude of the vector potential. A set of non-stationary envelope solutions of the NLS equation are considered as potential candidates for the modeling of rogue waves (freak waves) in beam–plasma interactions, namely in the form of the Peregrine soliton, the Akhmediev breather and the Kuznetsov–Ma breather. The variation of the structural properties of the latter structures with relevant plasma parameters is investigated, in particular focusing on the ratio between the (magnetic field dependent) cyclotron (gyro-)frequency and the plasma frequency.