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Turbulent Energization of Electron Power Law Tails during Magnetic Reconnection
Physical Review Letters ( IF 8.6 ) Pub Date : 2020-11-24 , DOI: 10.1103/physrevlett.125.225101
Giovanni Lapenta , Jean Berchem , Mostafa El Alaoui , Raymond Walker

Earth’s magnetotail is an excellent laboratory to study the interplay of reconnection and turbulence in determining electron energization. The process of formation of a power law tail during turbulent reconnection is a documented fact still in need of a comprehensive explanation. We conduct a massively parallel, particle in cell 3D simulation and use enhanced statistical resolution of the high energy range of the particle velocities to study how reconnection creates the conditions for the tail to be formed. The process is not direct acceleration by the coherent, laminar reconnection-generated electric field. Rather, reconnection causes turbulent outflows where energy exchange is dominated by a highly non-Gaussian distribution of fluctuations. Electron energization is diffuse throughout the entire reconnection outflow, but it is heightened by regions of intensified magnetic field such as dipolarization fronts traveling toward Earth.

中文翻译:

磁重新连接过程中电子功率定律的湍流能

地球的磁尾是研究电子连接中重新连接和湍流相互作用的出色实验室。在湍流重新连接期间形成幂律尾部的过程是一个有据可查的事实,尚需全面解释。我们在单元3D模拟中进行了大规模并行的粒子,并使用增强的粒子速度高能量范围的统计分辨率来研究重新连接如何为要形成的尾部创造条件。该过程不是由相干的,层流重新连接生成的电场直接加速。相反,重新连接会导致湍流流出,在该处,能量交换主要由高度的非高斯波动分布决定。电子激励在整个重新连接流出中扩散,
更新日期:2020-11-25
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