The role of nonlocalities in magnetosphere-ionosphere coupling processes |
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Authors: | G Ganguli P Palmadesso |
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Institution: | 1. Science Applications Inc., McLean, VA 22012, USA;7. Naval Research Laboratory, Code 4780, Washington, DC 20375, USA |
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Abstract: | Microinstabilities are believed to play a crucial role in the physics of Magnetosphere-Ionosphere coupling. The current driven ion cyclotron instability is a very important microinstability in this respect. We give a nonlocal formalism for studying the ion cyclotron instability in a more realistic magnetospheric environment than is available in the widely used local theory. This formalism includes the magnetic shear produced self-consistently by the field aligned currents and the finite extent of such currents. Significant departures from the local theory are noted. |
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