磁层亚暴爆发性起始中三维不稳定性与磁重联的相互作用
Interplay of Three-Dimensional Instabilities and Magnetic Reconnection in the Explosive Onset of Magnetospheric Substorms
AI总结：
本研究利用精确动力学磁尾平衡和粒子模拟，揭示了气球不稳定性破坏偶极化前沿引发亚暴爆发的机制，并通过自洽粒子追踪确定了非热粒子加速机制。
摘要：
磁层亚暴之前是磁通量加载和尾部电流片变薄的缓慢增长期。大量数据集提供了亚暴起始时触发不稳定性的证据，包括磁重联和气球不稳定性。利用精确的动力学磁尾平衡，我们提出了粒子模拟，通过气球不稳定性破坏偶极化前沿来捕捉亚暴的爆发性。我们使用自洽粒子追踪来确定非热粒子加速机制。
英文摘要：
Magnetospheric substorms are preceded by a slow growth phase of magnetic flux loading and current sheet thinning in the tail. Extensive datasets have provided evidence of the triggering of instabilities at substorm onset, including magnetic reconnection and ballooning instabilities. Using an exact kinetic magnetotail equilibrium we present particle-in-cell simulations which capture the explosive nature of substorms through a disruption of the dipolarization front by the ballooning instability. We use self-consistent particle tracking to determine the nonthermal particle acceleration mechanisms.
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