论文标题
热磁化vlasov等离子体中电磁惠斯勒波的微观结构
Microscopic structure of electromagnetic whistler wave damping by kinetic mechanisms in hot magnetized Vlasov plasmas
论文作者
论文摘要
低频横向扰动的动力阻尼机制通过电磁（EM）Vlasov模拟模拟了磁化暖电子等离子体中平行于磁场的传播。相当确定性并分析了电子磁流体动力吹动和有限电子温度对其实际频率的潜在物理学的短时尺度阻尼和有限电子温度效应的潜在物理。阻尼是由全球（在整个相位上盛行）与更熟悉的共振 - 电子特异性动力学阻尼机制之间的相互作用引起的，这两种机制都保持了熵，但通过将其特征性特征留在最初相干的有限幅度幅度修饰温暖电子平衡的最初特征性上。净阻尼是由确定性的热化或相结合过程引起的，它在很大程度上补充了与短期湍流相关的电子在较短的时间尺度下的谐振加速度。提出了用于发展的初始横向EM扰动的动力学模型，并应用于模拟中惠斯勒波相结合过程的签名。
The kinetic damping mechanism of low frequency transverse perturbations propagating parallel to the magnetic field in a magnetized warm electron plasma is simulated by means of electromagnetic (EM) Vlasov simulations. The short-time-scale damping of the electron magnetohydrodynamic whistler perturbations and underlying physics of finite electron temperature effect on its real frequency are recovered rather deterministically, and analyzed. The damping arises from an interplay between a global (prevailing over entire phase-space) and the more familiar resonant-electron-specific kinetic damping mechanisms, both of which preserve entropy but operate distinctly by leaving their characteristic signatures on an initially coherent finite amplitude modification of the warm electron equilibrium distribution. The net damping results from a deterministic thermalization, or phase-mixing process, largely supplementing the resonant acceleration of electrons at shorter time scales, relevant to short-lived turbulent EM fluctuations. A kinetic model for the evolving initial transverse EM perturbation is presented and applied to signatures of the whistler wave phase-mixing process in simulations.
