Nonlinear quasistationary electrostatic waves and solitonlike structures in collisional polar E-region plasma.

Details Nonlinear quasistationary electrostatic waves and solitonlike structures in collisional polar E-region plasma. Nonlinear quasistationary electrostatic waves and solitonlike structures in collisional polar E-region plasma.

Feb 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995cosre..33...57v&link_type=abstract

Cosmic Res., Vol. 33, No. 1, p. 57 - 63

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Plasma Diagnostics: Earth Ionosphere, Plasma: Magnetohydrodynamics

Scientific paper

The MHD approach to treat nonlinear waves and soliton-like structures developed by Volosevich and Galperin (1995) for collisionless magnetospheric plasmas, is extended to polar E-region plasma with strong collisions for unmagnetized ions (νi ≫ ωHi) and weak collisions for magnetized electrons (0 < νe < ωHe). Basic equations relating the density of particular species of charged particles to electrostatic potential are derived. Analytic solutions for linear small-amplitude waves and domains of numerical solutions for nonlinear waves and structures of large amplitude are considered. The resulting nonlinear waves and soliton-like structures for the quasi-neutral plasma in the polar ionospheric dynamo-region have a characteristic scale LE of the order of the ion gyroradius rLi and arbitrary amplitudes up to δn/n ≥ 1. It is assumed that such nonlinear large-amplitude waves and soliton-like structures play an important rôle in VHF radar aurora in the E-region and also in some other geophysical phenomena.

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