Structure, phase motion, and heating within Alfvén resonances

Details Structure, phase motion, and heating within Alfvén resonances Structure, phase motion, and heating within Alfvén resonances

Aug 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996jgr...10117399w&link_type=abstract

Journal of Geophysical Research, Volume 101, Issue A8, p. 17399-17408

Physics

Plasma Physics

27

Interplanetary Physics: Mhd Waves And Turbulence, Magnetospheric Physics: Mhd Waves And Instabilities, Space Plasma Physics: Kinetic And Mhd Theory, Space Plasma Physics: Waves And Instabilities

Scientific paper

An analytical investigation of Alfvén resonances is presented for the cases when energy is dissipated by (1) resistivity (ɛ) within the body of the plasma, and (2) finite Pedersen conductivity (Σp) within the ionospheric boundaries. Universal functions for both solutions are compared, and we find that the structure and phase motion of the resonant fields is fairly insensitive to the details of dissipation. We also identify a curious property of resonances: the spatially integrated (but not time-averaged) dissipation rate is independent of time for whichever dissipation process we consider. It appears that resonances have a remarkably robust structure.

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