Physics – Plasma Physics
Scientific paper
Apr 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999jgr...104.6919v&link_type=abstract
Journal of Geophysical Research, Volume 104, Issue A4, p. 6919-6928
Physics
Plasma Physics
8
Magnetospheric Physics: Plasma Waves And Instabilities, Space Plasma Physics: Magnetic Reconnection, Space Plasma Physics: Transport Processes, Magnetospheric Physics: Magnetopause, Cusp, And Boundary Layers
Scientific paper
A set of reduced nonlinear equations is presented, which describes the dynamics of a current layer at scale sizes below the ion skin depth. At these scales the ion motion can be ignored. These equations contain the effects of electron inertia and the Hall term with the intent of describing small-scale turbulence in the environment of the magnetopause. Magnetic shear effects are also included. It is found that the entire spectrum is linearly unstable either to the current gradient instability or to a kink-type mode. The kink-like instability, in contrast to the current gradient instability, also exists in the limit of massless electrons. The growth rate increases with decreasing current layer width and the jump of the north-south component of the magnetic field across the magnetopause.
Drake James F.
Vetoulis George
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