利用冲击磁通堆积调节受驱动磁重联的归一化率
Regulation of the Normalized Rate of Driven Magnetic Reconnection through Shocked Flux Pileup
摘要：
磁重联的地球重联实验（TREX）的非对称流入条件下，并在配置中的绝对率的重联是由外部驱动器。磁堆积增强了高密度流入的上游磁场，导致上游阿尔芬速度增加，并有助于将归一化重连率降低到理论考虑的预期值。此外，观察到远上游超音速等离子体流入和磁通量堆积区域之间的激波界面，这对系统的整体力平衡很重要，从而证明了包括超音速驱动流入的配置的激波形成的作用。尽管专门的几何形状，其中一个强大的重连驱动器应用从重连层的一侧，以前的数值和理论结果仍然强大，并显示出准确预测的归一化率的重连的范围内考虑的系统尺寸。该实验的重连率取决于系统尺寸，在应用的最小归一化系统尺寸下达到高达0.8的值。
英文摘要：
Magnetic reconnection is explored on the Terrestrial Reconnection Experiment (TREX) for asymmetric inflow conditions and in a configuration where the absolute rate of reconnection is set by an external drive. Magnetic pileup enhances the upstream magnetic field of the high density inflow, leading to an increased upstream Alfven speed and helping to lower the normalized reconnection rate to values expected from theoretical consideration. In addition, a shock interface between the far upstream supersonic plasma inflow and the region of magnetic flux pileup is observed, important to the overall force balance of the system, hereby demonstrating the role of shock formation for configurations including a supersonically driven inflow. Despite the specialised geometry where a strong reconnection drive is applied from only one side of the reconnection layer, previous numerical and theoretical results remain robust and are shown to accurately predict the normalized rate of reconnection for the range of system sizes considered. This experimental rate of reconnection is dependent on system size, reaching values as high as 0.8 at the smallest normalized system size applied.
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