Energy sources of field-aligned currents: Auroral electron energization

Details Energy sources of field-aligned currents: Auroral electron energization Energy sources of field-aligned currents: Auroral electron energization

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005jgra..11010s08w&link_type=abstract

Journal of Geophysical Research, Volume 110, Issue A10, CiteID A10S08

Physics

1

Ionosphere: Ionosphere/Magnetosphere Interactions (2736), Magnetospheric Physics: Auroral Phenomena (2407), Ionosphere: Particle Acceleration, Magnetospheric Physics: Electric Fields (2411), Magnetospheric Physics: Energetic Particles: Precipitating

Scientific paper

The electron acceleration region in field-aligned currents is considered not as an isolated system but as being embedded in a global circuit. Such a view permits clear identification of the ``generator region'' and the energy source driving the currents. The global perspective permits a critical appraisal of the appropriateness of using an electric potential to describe the electron acceleration and of criticisms of steady potential acceleration models. We find that ion energy is the source of electron acceleration and that in practice, an electric potential can be useful and appropriate for some circuits.

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