Publication Date:
2011-08-24
Description:
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.
Keywords:
GEOPHYSICS
Type:
Journal of Geophysical Research (ISSN 0148-0227); 98; A6; p. 9155-9169.
Format:
text