与地球磁尾重联流出内离子拾取有关的扭结状起伏的演化
Evolution of kinklike fluctuations associated with ion pickup within reconnection outflows in the Earth's magnetotail
摘要：
地球磁尾的磁重联（MR）通常伴随着爆炸释放的动能和热能在系统范围内的重新分配。最近，THEMIS任务的多航天器观测被用于研究磁尾中与磁共振相关的局部爆炸，以便了解亚暴期间磁共振爆发随后向地球的传播。在这里，我们调查等离子体和磁场波动/结构与MR排气和离子-离子扭结模式的不稳定性在一个有据可查的MR事件。扭结振荡的产生，演变和衰落的距离超过70 000公里，从重联网站在midmagnetotail的更偶极区域附近的地球。我们已经发现，扭结振荡驱动的不同的离子种群内的流出区域可以至少25 000公里的重联网站。
英文摘要：
Magnetic reconnection (MR) in Earth's magnetotail is usually followed by a systemwide redistribution of explosively released kinetic and thermal energy. Recently, multispacecraft observations from the THEMIS mission were used to study localized explosions associated with MR in the magnetotail so as to understand subsequent Earthward propagation of MR outbursts during substorms. Here we investigate plasma and magnetic field fluctuations/structures associated with MR exhaust and ion-ion kink mode instability during a well documented MR event. Generation, evolution and fading of kinklike oscillations are followed over a distance of 70 000 km from the reconnection site in the midmagnetotail to the more dipolar region near the Earth. We have found that the kink oscillations driven by different ion populations within the outflow region can be at least 25 000 km from the reconnection site.
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