论文标题
无碰撞磁重新连接中的边缘稳定电流板
Marginally Stable Current Sheets in Collisionless Magnetic Reconnection
论文作者
论文摘要
在磁重新连接的非线性发育过程中形成的非碰撞电流表的特征是厚度很小，是电子皮肤深度的阶段。它们可能对浆液的形成不稳定，从而使磁重新连接过程达到高重新连接速率。在这项工作中，我们研究了当形成电流纸纯粹无碰撞并且在存在强引导场的情况下时，我们研究了浆液发育的边际稳定性条件。我们分析以重新连接电流表的几何形状以及促进其伸长率的原因。一旦形成了重新连接电流表，我们就会确定其浆液不稳定的机制。我们的研究表明，在这种情况下，可以从宽高比小得多的电流表中获得浆液，并且在碰撞状态中要小得多，并且边缘稳定的电流层的血浆流动通道的倒数差为0.1美元。
Non-collisional current sheets that form during the nonlinear development of magnetic reconnection are characterized by a small thickness, of the order of the electron skin depth. They can become unstable to the formation of plasmoids, which allows the magnetic reconnection process to reach high reconnection rates. In this work, we investigate the marginal stability conditions for the development of plasmoids when the forming current sheet is purely collisionless and in the presence of a strong guide field. We analyze the geometry that characterizes the reconnecting current sheet, and what promotes its elongation. Once the reconnecting current sheet is formed, we identify the regimes for which it is plasmoid unstable. Our study shows that plasmoids can be obtained, in this context, from current sheets with an aspect ratio much smaller than in the collisional regime, and that the plasma flow channel of the marginally stable current layers maintains an inverse aspect ratio of $0.1$.
