Dynamics of the Electromagnetic Ion Cyclotron Nonlinear Solitary Structures in the Inner Magnetosphere

15th International Congress on Plasma Physics; 13th Latin American Workshop on Plasma Physics

Kaladze, T.D.^1 ; Tsintsadze, N.L.^2 ; Dam, J W Van^3 ; Horton, W.^3 ; Garner, T.W.^4 ; Fu, X.R.^3

I. Vekua Institute of Applied Mathematics, Tbilisi State University, 2 University Str., 0186 Tbilisi, Georgia^1

E. Andronikashvili Institute of Physics, Academy of Sciences, 0177, Tbilisi, Georgia^2

Institute for Fusion Studies, University of Texas at Austin, Texas, TX 78712, United States^3

Space and Geophysics Laboratory, Applied Research Laboratories, University of Texas at Austin, Texas, TX 78712, United States^4

关键词: Circularly polarized electromagnetic waves;    Geomagnetic field lines;    Geomagnetic fields;    Inner magnetosphere;    Nonlinear interactions;    Ponderomotive forces;    Quasi-static magnetic fields;    Solitary structures;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/511/1/012049/pdf
DOI  :  10.1088/1742-6596/511/1/012049

来源: IOP

【 摘 要 】

The nonlinear interaction of the electromagnetic ion cyclotron (EMIC) frequency waves with plasma particles in the inner magnetosphere is studied. The emission is considered to be circularly polarized electromagnetic waves propagating along the almost constant dipole geomagnetic field in the equatorial region of the inner magnetosphere. Under the action of the ion cyclotron ponderomotive force excitation of the magnetosonic waves through the amplitude modulation of the EMIC waves is investigated. Two dimensional nonlinear Schrodinger equation for the EMIC waves is derived. In the stationary case two solutions of the nonlinear Schrodinger equation with distinct natures are found. The generation of both vortices and of a quasistatic magnetic field across the geomagnetic field lines is discussed.