Nonlinear interaction between a resonance-mode (k∥=0) wave and energetic plasma particles
Nonlinear interaction between a resonance-mode (k∥=0) wave and energetic plasma particles
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共振模式 (k∥=0) 波与高能等离子体粒子之间的非线性相互作用
DOI：
10.1017/s0022377808007496
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发表时间：
2009
影响因子：
2.5
通讯作者：
D. Shklyar
中科院分区：
文献类型：
--
作者：
D. Shklyar
摘要本文详细研究了均匀等离子体中高能粒子与垂直于环境磁场传播的准静电波的非线性共振相互作用，主要研究了共振相互作用引起的波的放大或衰减。当k ε → 0时，由线性共振条件确定的共振速度趋于无穷大，相互作用是完全非线性的。当波的振幅随波的参数和高能粒子分布函数的积分特征而增大或减小时，当波的频率接近于回旋谐波的倍数时，当共振粒子的横向能量足够大时，波的振幅会发生本质的放大。
Abstract Nonlinear resonant interaction between energetic particles and quasi-electrostatic wave propagating perpendicularly to the ambient magnetic field in a homogeneous plasma is studied in detail, with the main focus on the wave amplification or attenuation caused by resonant interaction. As for k∥ → 0, resonance velocity determined from linear resonance conditions tends to infinity, the interaction under discussion is a completely nonlinear phenomenon. While the wave amplitude may increase or decrease depending on the wave parameters and integral characteristics of the energetic particle distribution function, an essential wave amplification may occur when the wave frequency is close to a multiple of cyclotron harmonic, and when the transversal energy of resonant particles is large enough.