磁抽运过程中产生增强电子加热的平行速度混合
Parallel Velocity Mixing Yielding Enhanced Electron Heating During Magnetic Pumping
摘要：
在太阳风和地球弓形激波附近观测到磁波扰动。对于这样的环境，最近的工作磁泵与电子捕获在磁扰动已经证明了有效的超热电子的可能性。在这里，我们还分析了这种充满活力的电子，通过系统的渡越时间是短的时间尺度与磁场的演变相比，电子的闪烁。特别是，考虑到一个理想化的磁配置，我们展示了如何捕获/脱陷充满活力的磁化电子可以导致有效的平行速度扩散。这种平行扩散与已知会引起俯仰角散射的自然发生的机制（如哨声波）相结合，产生了增强的磁泵浦加热速率。我们发现，在低俯仰角散射率的组合机制增强加热超出了最近的理论预测的磁泵与被困电子。
英文摘要：
Magnetic wave perturbations are observed in the solar wind and in the vicinity of Earth's bow shock. For such environments, recent work on magnetic pumping with electrons trapped in the magnetic perturbations have demonstrated the possibility of efficient energization of superthermal electrons. Here we also analyze the energization of such energetic electrons for which the transit time through the system is short compared to time scales associated with the magnetic field evolution. In particular, considering an idealized magnetic configuration we show how trapping/detrapping of energetic magnetized electrons can cause effective parallel velocity diffusion. This parallel diffusion, combined with naturally occurring mechanisms known to cause pitch angle scattering, such as Whistler waves, produces enhanced heating rates for magnetic pumping. We find that at low pitch angle scattering rates the combined mechanism enhances the heating beyond the predictions of the recent theory for magnetic pumping with trapped electrons.
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