标题： 强磁化等离子体中的快速无碰撞重联与电子加热 显示英文标题

标题： Fast collisionless reconnection and electron heating in strongly magnetized plasmas

摘要： 在强磁化（低β值）、弱碰撞等离子体中的磁重联现象被一种新颖的流体-动能模型所研究[Zocco & Schekochihin, 物理等离子体 18, 102309 (2011)]，该模型保留了非等温电子动能效应。结果表明，通过朗道阻尼（线性相空间混合）引起的电子加热是主要的耗散机制。随着时间推移，电子加热发生在重联速率峰值之后；在空间上，它集中在磁岛的分离线上。对于足够大的系统，峰值重联速率为$cE_{max}\approx 0.2v_AB_{y,0}$，其中$v_A$是基于重连磁场$B_{y,0}$的阿尔芬速度。岛屿饱和宽度与 MHD 模型相同，除了在小系统中，此时它变得与动能尺度相当。 显示英文摘要

摘要： Magnetic reconnection in strongly magnetized (low-beta), weakly collisional plasmas is investigated using a novel fluid-kinetic model [Zocco & Schekochihin, Phys. Plasmas 18, 102309 (2011)] which retains non-isothermal electron kinetics. It is shown that electron heating via Landau damping (linear phase mixing) is the dominant dissipation mechanism. In time, electron heating occurs after the peak of the reconnection rate; in space, it is concentrated along the separatrices of the magnetic island. For sufficiently large systems, the peak reconnection rate is $cE_{max}\approx 0.2v_AB_{y,0}$, where $v_A$ is the Alfv\'en speed based on the reconnecting field $B_{y,0}$. The island saturation width is the same as in MHD models except for small systems, when it becomes comparable to the kinetic scales.