Physics – Plasma Physics
Scientific paper
May 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993ppcn.conf..195n&link_type=abstract
In ESA, Fourth International Toki Conference on Plasma Physics and Controlled Nuclear Fusion p 195-197 (SEE N94-22624 05-75)
Physics
Plasma Physics
Energy Transfer, Magnetohydrodynamic Waves, Solar Flares, Coronal Loops, Current Density, Magnetohydrodynamics, Plasma Currents, Solar Wind
Scientific paper
An extension of the release of energy at Alfvenic fronts is presented. The Alfvenic fronts are created by the sudden switch on of a resistance, uniform across the flux tube, which is used to model the flare kernel. At the fronts the current flowing in the flux tube is partially deflected to the surface of the tube, forming a singular surface current. In the models presented, the current density is partially deflected from smaller to larger radii within the flux tube, removing the singular surface current. It is found that for a significant amount of power released, the effective resistivity peaks in a thin sheath on the surface of the flux tube where the current drops to zero. The results show that various flare phenomena due to precipitating nonthermal electrons, accelerated in the regions of high resistivity, will be offset from the regions of peak vertical current density.
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