论文标题
谐振惠斯勒电子相互作用：MMS观测值与测试粒子模拟
Resonant whistler-electron interactions: MMS observations vs. test-particle simulation
论文作者
论文摘要
研究了磁层多轴（MMS）航天器中的电子速度分布函数（VDF）中的特征3维（3D）特征，并研究了地球磁铁中的磁磁性波。强烈的波数据包被表征并在分析上以准平行圆形的惠斯勒波的分析性进行了分析，并将其应用于测试粒子模拟，鉴于深入了解速度空间中波粒子共振的特征。在测试粒子模拟中证明了Landau和Cyclotron共振。测试粒子签名的位置和一般形状确实解释了观察值，但是更细节（例如观察到的特征的对称性）不匹配，表明测试粒子方法的限制或更基本的物理机制尚未掌握。最后，结果表明，在这种精确的共振情况下，电子的能量无法使用分布函数的矩进行诊断，就像经典$ {\ bf e}一样。
Simultaneous observation of characteristic 3-dimensional (3D) signatures in the electron velocity distribution function (VDF) and intense quasi-monochromatic waves by the Magnetospheric Multiscale (MMS) spacecraft in the terrestrial magnetosheath are investigated. The intense wave packets are characterised and modeled analytically as quasi-parallel circularly-polarized whistler waves and applied to a test-particle simulation in view of gaining insight into the signature of the wave-particle resonances in velocity space. Both the Landau and the cyclotron resonances were evidenced in the test-particle simulations. The location and general shape of the test-particle signatures do account for the observations, but the finer details, such as the symmetry of the observed signatures are not matched, indicating either the limits of the test-particle approach, or a more fundamental physical mechanism not yet grasped. Finally, it is shown that the energisation of the electrons in this precise resonance case cannot be diagnosed using the moments of the distribution function, as done with the classical ${\bf E}.{\bf J}$ "dissipation" estimate.
