Cyclotron resonance in plasma flow
Cyclotron resonance in plasma flow
复制标题
等离子体流中的回旋共振
DOI：
10.1063/1.4853615
复制
发表时间：
2013
影响因子：
2.2
通讯作者：
V. Krasnoselskikh
中科院分区：
文献类型：
--
作者：
A. Artemyev;O. Agapitov;V. Krasnoselskikh
本文研究了等离子体流中粒子与沿沿着不均匀背景磁场传播的圆电磁波的共振相互作用加速粒子的机理。我们考虑的系统中的等离子体流的速度是足够大的，以改变波的传播方向在静止框架。该系统模拟了准平行冲击波内部结构的典型磁场配置。我们考虑陀螺共振相互作用的条件时，相应的背景磁场的不均匀性的力是由波磁场的洛伦兹力补偿。波的振幅被假定为约10%的背景磁场。我们证明了粒子可以获得能量，如果kvsw>ω>kvsw−Ωc，其中k是波数，vsw是等离子体流速，ω和Ωc分别是波频率和粒子回转频率。这种加速机制类似于陀螺冲浪机制，但效果…
This paper is devoted to the mechanism of particle acceleration via resonant interaction with the electromagnetic circular wave propagating along the inhomogeneous background magnetic field in the presence of a plasma flow. We consider the system where the plasma flow velocity is large enough to change the direction of wave propagation in the rest frame. This system mimics a magnetic field configuration typical for inner structure of a quasi-parallel shock wave. We consider conditions of gyroresonant interaction when the force corresponding to an inhomogeneity of the background magnetic field is compensated by the Lorentz force of the wave-magnetic field. The wave-amplitude is assumed to be about 10% of the background magnetic field. We show that particles can gain energy if kvsw>ω>kvsw−Ωc where k is the wave number, vsw is a plasma flow velocity, and ω and Ωc are the wave frequency and the particle gyrofrequency, respectively. This mechanism of acceleration resembles the gyrosurfing mechanism, but the ef...