Secondary instabilities and vortex formation in collisionless-fluid magnetic reconnection
Secondary instabilities and vortex formation in collisionless-fluid magnetic reconnection
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DOI：
10.1103/physrevlett.91.235001
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发表时间：
2003-12-05
影响因子：
8.6
通讯作者：
Pegoraro, F
中科院分区：
文献类型：
--
作者：
Del Sarto, D;Califano, F;Pegoraro, F
结果表明，在无碰撞的二维流体等离子体中，在磁力线重联的非线性阶段，在磁岛内形成的电流层图案受到二次不稳定性的影响，二次不稳定性的影响随着电子温度的降低而增加。在冷电子极限下，岛状生长的饱和伴随着电流层的湍流再分布和长寿命流体涡旋的发展，而在相反的电子极限下，电流层结构保持规则。
It is shown that the pattern of current layers formed within a magnetic island in the nonlinear phase of magnetic field line reconnection in a collisionless two-dimensional fluid plasma is subject to the onset of a secondary instability, the effect of which increases with decreasing electron temperature. In the cold electron limit the saturation of the island growth is accompanied by a turbulent redistribution of the current layers and by the development of long lived fluid vortices while, in the opposite limit, the current layer structure remains regular.