Relativistic electron acceleration by oblique whistler waves
Relativistic electron acceleration by oblique whistler waves
复制标题
DOI：
10.1063/1.4831965
复制
发表时间：
2013-11
影响因子：
2.2
通讯作者：
P. Yoon;V. Pandey;Dong‐Hun Lee
中科院分区：
文献类型：
--
作者：
P. Yoon;V. Pandey;Dong‐Hun Lee
为了研究相对论电子与有限振幅、斜传播哨声波相互作用的加速作用，对电子与哨声波相互作用的粒子模拟进行了研究。根据目前的发现，当波幅保持在相对较低的恒定值时，相对论电子的有效加速需要一个接近哨声共振锥角的窄范围的斜传播角。对于恒定的波传播角，我们发现一定范围的斜哨哨波振幅允许相对论电子加速到O(MeV)能量。实验电子的初始分布在能空间作图时呈幂函数分布。研究还发现，在电子螺距角空间内，加速度基本是均匀的。
Test-particle simulations of electrons interacting with finite-amplitude, obliquely propagating whistler waves are carried out in order to investigate the acceleration of relativistic electrons by these waves. According to the present findings, an efficient acceleration of relativistic electrons requires a narrow range of oblique propagation angles, close to the whistler resonance cone angle, when the wave amplitude is held constant at relatively low value. For a constant wave propagation angle, it is found that a range of oblique whistler wave amplitudes permits the acceleration of relativistic electrons to O(MeV) energies. An initial distribution of test electrons is shown to form a power-law distribution when plotted in energy space. It is also found that the acceleration is largely uniform in electron pitch-angle space.