3-DIMENSIONAL MAGNETOSPHERIC EQUILIBRIUM WITH ISOTROPIC PRESSURE

被引:34
作者
CHENG, CZ
机构
[1] Princeton University, Plasma Physics Laboratory, Princeton, New Jersey
关键词
D O I
10.1029/95GL02308
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
In the absence of the toroidal flux, two coupled quasi two-dimensional elliptic equilibrium equations have been derived to describe self-consistent three-dimensional quasi-static magnetospheric equilibria with isotropic pressure in an optimal (psi, alpha, chi) flux coordinate system, where psi is the magnetic flux function, chi is a generalized poloidal angle, alpha = phi - delta(psi, alpha, chi), phi is the toroidal angle, delta(psi, alpha, chi) is periodic in phi, and the magnetic field is represented as B = del psi x del alpha. A three-dimensional magnetospheric equilibrium code, the MAG-3D code, has been developed by employing an iterative metric method. The MAG-3D code is the first self-consistent three-dimensional magnetospheric equilibrium code. The main difference between the three-dimensional and the two-dimensional axisymmetric solutions is that the field-aligned current and the toroidal magnetic field are finite for the three-dimensional case, but vanish for the two-dimensional axisymmetric case. The toroidal magnetic field gives rise to a geodesic magnetic field curvature and thus a magnetic drift parallel to the pressure gradient direction, which gives rise to the field-aligned current.
引用
收藏
页码:2401 / 2404
页数:4
相关论文
共 16 条
[1]   RING CURRENT, GEOMAGNETIC DISTURBANCE, AND VAN ALLEN RADIATION BELTS [J].
AKASOFU, SI ;
CHAPMAN, S .
JOURNAL OF GEOPHYSICAL RESEARCH, 1961, 66 (05) :1321-+
[2]   BIRKELAND CURRENTS IN AN ANISOTROPIC, MAGNETOSTATIC PLASMA [J].
BIRMINGHAM, TJ .
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1992, 97 (A4) :3907-3917
[3]   MAGNETOTAIL EQUILIBRIUM-THEORY - THE GENERAL 3-DIMENSIONAL SOLUTION [J].
BIRN, J .
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1987, 92 (A10) :11101-11108
[4]   MAGNETOSPHERIC EQUILIBRIUM WITH ANISOTROPIC PRESSURE [J].
CHENG, CZ .
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1992, 97 (A2) :1497-1510
[5]  
Degtyarev L.M., 1987, 14TH EUR C CONTR F D, V11, P377
[6]   SOME NEW VARIATIONAL PROPERTIES OF HYDROMAGNETIC EQUILIBRIA [J].
GRAD, H .
PHYSICS OF FLUIDS, 1964, 7 (08) :1283-1292
[7]   REPRESENTATIONS OF CURRENTS AND MAGNETIC-FIELDS IN ISOTROPIC MAGNETOHYDROSTATIC PLASMA [J].
HEINEMANN, M ;
PONTIUS, DH .
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1990, 95 (A1) :251-257
[8]   3-DIMENSIONAL MAGNETOTAIL EQUILIBRIA BY NUMERICAL RELAXATION TECHNIQUES [J].
HESSE, M ;
BIRN, J .
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1993, 98 (A3) :3973-3982
[9]   FIELD-ALIGNED CURRENTS IN DAYSIDE CUSP OBSERVED BY TRIAD [J].
IIJIMA, T ;
POTEMRA, TA .
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1976, 81 (34) :5971-5979
[10]   AMPLITUDE DISTRIBUTION OF FIELD-ALIGNED CURRENTS AT NORTHERN HIGH LATITUDES OBSERVED BY TRIAD [J].
IIJIMA, T ;
POTEMRA, TA .
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS, 1976, 81 (13) :2165-2174