Physics
Scientific paper
Dec 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agufmsm51a0804d&link_type=abstract
American Geophysical Union, Fall Meeting 2001, abstract #SM51A-0804
Physics
2704 Auroral Phenomena (2407), 2712 Electric Fields (2411), 2752 Mhd Waves And Instabilities, 2753 Numerical Modeling, 7867 Wave/Particle Interactions
Scientific paper
Over the last several years, much attention has been directed toward wave-particle interactions in Field Line Resonances to explain the observed parallel electric field accompanying discrete auroral arc formation. It has been suggested that dipolar topology plays an important role in these interactions and must be accounted for. In order to more completely address this, we have adapted the hybrid kinetic-MHD box model of a Field Line Resonance to dipolar coordinates including the effects of converging magnetic field lines. The model consists of a cold linear MHD fluid for the ions and kinetic electrons. The perpendicular electric fields are obtained from the ideal MHD assumption while the fluid-particle system is closed via an expression for the parallel electric field including terms involving the current and pressure moments of the electron distribution function. We will present results of the hybrid model in dipolar coordinates contrasted with the box model results.
Damiano Peter A.
Samson John C.
Sydora Richard D.
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