Polar wind ion dynamics in the magnetotail

Details Polar wind ion dynamics in the magnetotail Polar wind ion dynamics in the magnetotail

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....98.9155d&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. A6, p. 9155-9169.

Physics

37

Geomagnetic Tail, Ionospheric Ion Density, Particle Trajectories, Plasma Dynamics, Kp Index, Plasma Layers, Polar Regions

Scientific paper

The circulation of polar wind ions from the high-latitude ionosphere to the plasma sheet is investigated. Single-particle trajectory simulations for the geomagnetic tail show, in addition to the breaking of adiabaticity, the possible creation of new high-altitude mirror points. This trajectory feature results from an intense parallel deceleration imparted by the magnetic field rotation during fast ExB transport. This centrifugal deceleration yields a critical parallel velocity which depends on the magnitude of the convection electric field and below which ions remain trapped inside the neutral sheet.

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