Magnetic reconnection in plasmas

被引:77
作者
Biskamp, D
机构
[1] Max-Planck-Inst. fur Plasmaphysik
关键词
magnetic fields; reconnection; MHD Turbulence; cosmic plasmas;
D O I
10.1007/BF00645113
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
A review of the present status of the theory of magnetic reconnection is given. In strongly collisional plasmas reconnection proceeds via resistive current sheets, i.e. quasi-stationary macroscopic Sweet-Parker sheets at intermediate values of the magnetic Reynolds number R-m, or mirco-current sheets in MHD turbulence, which develops at high R-m. In hot, dilute plasmas the reconnection dynamics is dominated by nondissipative effects, mainly the Hall term and electron inertia. Reconnection rates are found to depend only on the ion mass, being independent of the electron inertia and the residual dissipation coefficients. Small-scale whistler turbulence is readily excited giving rise to an anomalous electron viscosity. Hence reconnection may be much more rapid than predicted by conventional resistive theory.
引用
收藏
页码:165 / 208
页数:44
相关论文
共 50 条