Numerical BGK-solutions of large scale electrostatic potential in auroral plasmas

Details Numerical BGK-solutions of large scale electrostatic potential in auroral plasmas Numerical BGK-solutions of large scale electrostatic potential in auroral plasmas

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986georl..13..897w&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 13, Sept. 1986, p. 897-900.

Physics

14

Auroral Zones, Magnetohydrodynamic Flow, Plasma Potentials, Space Plasmas, Trapped Particles, Ionospheric Electron Density, Ionospheric Ion Density, Magnetic Mirrors

Scientific paper

The formation of large scale and large amplitude electrostatic potential along magnetic field lines from the high speed plasma flow in auroral plasmas is considered, and the potential difference and its profile are analyzed under both quasi-neutral and currentless conditions. A potential profile is developed by introducing a population of electrons which are trapped between the magnetic mirror and the electrostatic potentials. The profile is consistent with observations which indicate the existence of a strong electric field at an altitude of several thousands of km from the earth at the polar region, where the potential increases very slowly near the plasmasheet, and abruptly near the topside ionosphere.

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