Parallel Heating Associated with Interaction of Forward and Backward Electromagnetic Cyclotron Waves
Parallel Heating Associated with Interaction of Forward and Backward Electromagnetic Cyclotron Waves
复制标题
与正向和反向电磁回旋波相互作用相关的并行加热
DOI：
10.5636/jgg.40.949
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
H. Matsumoto
中科院分区：
文献类型：
--
作者：
Y. Omura;H. Usui;H. Matsumoto
我们研究了在与等离子体中的静磁场平行传播的两个前向和后向电磁回旋波存在的情况下热粒子的并行加热。这两种沿相反方向传播的波通常是由磁化等离子体中高能粒子的温度各向异性驱动的电磁不稳定性激发的。我们开发了一种理论，该理论给出了热粒子在平行方向上的加热速率，并且我们还推导出了热粒子的非线性回旋加速器捕获的波幅阈值。我们使用电磁混合代码进行了计算机实验，其中我们假设各向异性热质子作为自由能源。前向和后向离子回旋波由低于氦回旋加速器频率的频率激发。我们观察到氦离子在平行方向上的加热。加热速率与理论估计非常吻合。
We studied parallel heating of thermal particles in the presence of two forward and backward electromagnetic cyclotron waves propagating parallel to a static magnetic field in a plasma. Such two waves traveling in opposite directions are commonly excited by electromagnetic instabilities driven by a temperature anisotropy of energetic particles in a magnetized plasma. We developed a theory which gives a heating rate of thermal particles in the parallel direction and we also derived a threshold of the wave amplitude for nonlinear cyclotron trapping of the thermal particles. We performed a computer experiment using an electromagnetic hybrid code, where we assumed anisotropic hot protons as a free energy source. Forward and backward ion cyclotron waves were excited with frequencies below the helium cyclotron frequency. We observed heating of helium ions in the parallel direction. The heating rate agrees well with the theoretical estimate.