Mapping for nonlinear electron interaction with whistler-mode waves
Mapping for nonlinear electron interaction with whistler-mode waves
复制标题
电子与哨声波非线性相互作用的映射
DOI：
10.1063/1.5144477
复制
发表时间：
2020-04-01
影响因子：
2.2
通讯作者：
Vasiliev, A. A.
中科院分区：
文献类型：
--
作者：
Artemyev, A. V.;Neishtadt, A. I.;Vasiliev, A. A.
相对论电子与哨声模波的共振相互作用是地球辐射带和其他空间等离子体系统中电子加速和散射的重要机制。对于低振幅波，这种相互作用可以用准线性扩散理论很好地描述，而高振幅波引起的非线性共振效应主要是用测试粒子方法(解析和数值)来研究的。在本文中，我们发展了一种映射技术来描述这种非线性共振相互作用。利用共振系统的哈密顿理论，我们导出了电子在相空间中输运的主要特征，并结合这些特征构造了映射。这个映象可以看作是经典奇里科夫映象在非扩散粒子输运系统中的推广，它允许我们模拟电子分布函数的长期演化。
The resonant interaction of relativistic electrons and whistler-mode waves is an important mechanism of electron acceleration and scattering in the Earth radiation belts and other space plasma systems. For low amplitude waves, such an interaction is well described by the quasi-linear diffusion theory, whereas nonlinear resonant effects induced by high-amplitude waves are mostly investigated (analytically and numerically) using the test particle approach. In this paper, we develop a mapping technique for the description of this nonlinear resonant interaction. Using the Hamiltonian theory for resonant systems, we derive the main characteristics of electron transport in the phase space and combine these characteristics to construct the map. This map can be considered as a generalization of the classical Chirikov map for systems with nondiffusive particle transport and allows us to model the long-term evolution of the electron distribution function.