MAGNETIC RECONNECTION DRIVEN BY CURRENT REPULSION

被引：17

作者：

RICHARD, RL

SYDORA, RD

ASHOURABDALLA, M

机构：

[1] Department of Physics, University of California at Los Angeles, Los Angeles

[2] Institute of Geophysics and Planetary Physics, University of California at Los Angeles, Los Angeles

来源：

PHYSICS OF FLUIDS B-PLASMA PHYSICS | 1990年 / 2卷 / 03期

关键词：

D O I：

10.1063/1.859338

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The evolution of an equilibrium consisting of two magnetic islands with oppositely directed currents embedded in a strong magnetic field is investigated, using numerical simulation methods. The rapid development of an ideal magnetohydrodynamic instability is observed, which first rotates and then expels the islands. The growth rate is on the order of the inverse of the Alfvén transit time and is much higher than that for magnetic island coalescence. In the nonlinear stage, resistivity becomes important as the reconnection process ensues and dissipates the magnetic energy. The growth rate of the instability is a weak function of the plasma beta and other plasma parameters such as S, the magnetic Reynolds number. An energy principle analysis, based on eigenfunctions obtained from the simulation, confirms the existence of the instability. © 1990 American Institute of Physics.

引用

页码：488 / 494

页数：7

共 11 条

[1]

[Anonymous], 1945, HYDRODYNAMICS

[2]

BISKAMP D, 1980, PHYS REV LETT, V44, P16

[3] HALF-COALESCENCE OF THE M=1,N=1 MAGNETIC ISLAND IN TOKAMAKS [J].