Magnetic Field Line Reconnection in Weakly Ionized Plasmas
Magnetic Field Line Reconnection in Weakly Ionized Plasmas
复制标题
弱电离等离子体中的磁场线重联
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
J. Sakai
中科院分区：
文献类型：
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作者：
S. V. Bulanov;J. Sakai
本文给出了弱电离等离子体中磁力线重联的理论研究结果。我们研究了小振幅磁流体动力学（MHD）波在磁场临界线附近的传播，并发现了电流堆积现象。这种磁崩溃所描述的自相似的解决方案，证明在磁场分界线表面附近的奇异结构的形成。我们得到了电流片撕裂模不稳定性的增长率，并给出了弱电离等离子体平板的泰勒问题的解。我们已经发现的重联率和无量纲参数描述的非线性和耗散效应的临界点附近的相对作用。我们提出的结果的磁流体计算机模拟的两个回路的合并，显示依赖于重联的离子中性漂移的值。
We present the results of theoretical studies of the magnetic field line reconnection in weakly ionized plasmas. We investigate the propagation of small amplitude magnetohydrodynamic (MHD) waves near critical lines of the magnetic field and show the occurrence of the pile-up of electric current. This magnetic collapse is described by self-similar solutions that demonstrate the formation of singular structures in the vicinity of the magnetic field separatrix surfaces. We obtain the growth rate of the tearing mode instability of the current sheet and present a solution of the Taylor problem for a slab of a weakly ionized plasma. We have found the reconnection rate and the dimensionless parameters that describe the relative role of nonlinearity and dissipation effects near critical points. We present results of the MHD computer simulation of two-loop coalescence that show the dependence of reconnection on the value of ion-neutral drift.