Physics
Scientific paper
Jan 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985p%26ss...33...89w&link_type=abstract
Planetary and Space Science (ISSN 0032-0633), vol. 33, Jan. 1985, p. 89-96.
Physics
6
Auroral Zones, Earth Magnetosphere, Geomagnetism, Magnetic Field Configurations, Plasma Potentials, Debye Length, Lines Of Force, Magnetically Trapped Particles, Plasma Layers, Simulation
Scientific paper
It is found, by means of particle simulations, that the field-aligned scale length of the V-potential along auroral-field lines depends on the convergence of the magnetic-field lines. In a uniform magnetic field, the potential drop is localized in a double layer with a field-aligned scale length of the order of the Debye length. In a converging magnetic field, the potential drop is shown to be extended with a field-aligned scale length much greater than the Debye length. The converging magnetic field appears to contribute to the retention of trapped electrons confined between the magnetic mirror and the electrostatic potential-barrier. When a background plasma is included in the simulation, the potential structure is shown to detach from the ionospheric boundary.
Kan Joseph R.
Wagner Stefan J.
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