Transport and Loss of Injected Magnetospheric Plasmas

Details Transport and Loss of Injected Magnetospheric Plasmas Transport and Loss of Injected Magnetospheric Plasmas

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sm31b07p&link_type=abstract

American Geophysical Union, Spring Meeting 2001, abstract #SM31B-07

Physics

2730 Magnetosphere--Inner, 2740 Magnetospheric Configuration And Dynamics, 2760 Plasma Convection, 2788 Storms And Substorms

Scientific paper

Energetic plasma injections toward the inner magnetosphere and their subsequent transport, trapping, and loss are several of the hallmarks of magnetospheric storm and substorm phenomana. Modeling of post-injection plasma transport has been important in understanding magnetospheric dynamics, as well as in planning magnetospheric observations such as those provided now by instruments on the IMAGE observatory. Highest energy plasma transport is dominated by westward gradient and curvature drift. Medium energy plasma (near 10 keV) is understood and observed by instruments on IMAGE to be more stagnant, remaining concentrated in the night sector. Even lower energy plasma (less than a few keV) may be expected to drift dawnward and duskward under the influence of sunward convection during conditions of strong magnetospheric convection. Fast observations have shown day side ion populations in the few keV energy range on post injection time scales of a few hours - much less than required by corotation. It is postulated that these are due to convective flows through the dusk and dawn regions. We will report on IMAGE/MENA and HENA observations of energy dependent post injection plasma transport - and attempt to make contact with both global models and Fast plasma observations.

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