Physics – Plasma Physics
Scientific paper
Oct 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996jgr...10121493g&link_type=abstract
Journal of Geophysical Research, Volume 101, Issue A10, p. 21493-21500
Physics
Plasma Physics
9
Magnetospheric Physics: Magnetosphere/Ionosphere Interactions, Magnetospheric Physics: Mhd Waves And Instabilities, Space Plasma Physics: Transport Processes, Space Plasma Physics: Wave/Particle Interactions
Scientific paper
We discuss the ponderomotive redistribution of ions along geomagnetic field lines due to the action of Pc 1 pulsations, using a simple diffusion equilibrium model. The field-aligned component of the ponderomotive force is derived for Alfvén waves as well as for ion cyclotron waves propagating in a multicomponent plasma. Our theory gives a possibility for a better understanding of the problem and a convenient way to make rough estimates of the ponderomotive efficiency of Pc 1 waves under concrete magnetospheric conditions. Qualitative analysis of equations and satellite information on the intensity of wave fields show that the ponderomotive forces can have a pronounced effect on plasma. Ground-based observations of Pc 1 pulsations also suggest a ponderomotive redistribution of the background plasma.
Guglielmi Alberto
Kangas Jorma
Mursula Kalevi
Pikkarainen T.
Pokhotelov O.
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