Physics
Scientific paper
Feb 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983angeo...1...91l&link_type=abstract
Annales Geophysicae (ISSN 0755-0685), vol. 1, Jan.-Feb. 1983, p. 91-96.
Physics
5
Current Density, Earth Magnetosphere, Electric Potential, Field Aligned Currents, Electric Fields, Electron Density (Concentration), Electron Energy, Ionospheric Currents, Magnetic Flux
Scientific paper
The field-aligned current density is a non-linear function of the applied potential difference between the ionosphere and the magnetosphere. This non-linear function has been calculated for plasma boundary conditions typical in a dayside cusp magnetic flux tube. The J-characteristic of such a flux tube changes when the temperatures of the warm magnetospheric electrons and of the cold ionospheric electrons are modified; it changes also when the relative density of the warm plasma is modified; the presence of trapped secondary electrons changes also the J-characteristic. The dynamic characteristic of an electric circuit depends on the static characteristic of each component of the system: i.e., the resistive ionosphere, the return current region, and the region of particle precipitation whose field-aligned current/voltage characteristics have been studied in this article.
Lemaire Joseph
Scherer Michael M.
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