Finite Larmor radius convection instability in the near-Earth plasma sheet

Details Finite Larmor radius convection instability in the near-Earth plasma sheet Finite Larmor radius convection instability in the near-Earth plasma sheet

Feb 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999jgr...104.2443k&link_type=abstract

Journal of Geophysical Research, Volume 104, Issue A2, p. 2443-2450

Physics

12

Magnetospheric Physics, Magnetospheric Physics: Magnetosphere/Ionosphere Interactions, Magnetospheric Physics: Plasma Convection, Magnetospheric Physics: Plasma Sheet

Scientific paper

Violation of the frozen-in condition for the plasma sheet ions when the spatial scale of disturbance is of the order of the Larmor radius leads to the magnetospheric convection instability. This instability results in the separation of the convection plasma flow into jets with the spatial scale of the order of 1 km (from a few hundreds meters up to a few kilometers) at the ionosphere level. The instability develops in these regions of the plasma sheet where the contents of the hot ions in the unit magnetic flux tube vary with the distance from the Earth. This takes place at the boundaries of the plasma sheet. The instability has a large growth rate (up to 0.01 s-1). In the nighside plasma sheet region the developing structures are stretched approximately along the auroral oval.

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