Westward cross-field motion of negative charge filament activated by gradient-curvature proton drift - A cause of the westward traveling surge

Details Westward cross-field motion of negative charge filament activated by gradient-curvature proton drift - A cause of the westward traveling surge Westward cross-field motion of negative charge filament activated by gradient-curvature proton drift - A cause of the westward traveling surge

Jul 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988jgr....93.7398y&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 93, July 1, 1988, p. 7398-7408.

Physics

2

Auroral Zones, Crossed Fields, Electron Precipitation, Ionospheric Drift, Proton Precipitation, Traveling Charge, Traveling Ionospheric Disturbances, Electric Fields, Ionospheric Conductivity, Plasma Dynamics, Plasmasphere, Polar Substorms, Two Fluid Models

Scientific paper

This paper presents the results of a numerical study of the temporal evolution of space charge distributions which are assumed to be generated in response to field-aligned plasma injection from the tail plasma-sheet around local midnight. The simulation model uses two-fluid approximation, with the energetic protons executing the gradient and the westward curvature drifts in addition to the E x B drift; the spatial and temporal development of the charge filamaents is numerically followed in a plane perpendicular to the magnetic field. The results show that the gradient and the curvature drift of the positive charge carriers (energetic protons) can significantly increase the westward front-velocity of the negative charge filament and lead it poleward.

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