Physics
Scientific paper
Jun 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999jgr...10412289p&link_type=abstract
Journal of Geophysical Research, Volume 104, Issue A6, p. 12289-12300
Physics
17
Magnetospheric Physics: Magnetotail, Magnetospheric Physics: Mhd Waves And Instabilities, Magnetospheric Physics: Plasma Convection, Magnetospheric Physics: Plasma Sheet
Scientific paper
In the near-Earth plasma sheet the pressure gradient and magnetic curvature are both directed earthward. This region is thus potentially unstable to the ballooning mode provided that the plasma β becomes large enough. In this a work a three-dimensional electromagnetic full-particle simulation is used to study the evolution of the near-Earth plasma sheet under the influence of an external convection electric field. As the plasma β increases to ~10 during the convection process, the excitation of a drift ballooning mode is observed whose real frequency and growth rate agree well with fluid predictions including the effect of the ion diamagnetic drift. The maximum intensity in the ballooning spectrum corresponds to an azimuthal mode number m~60. The spectrum is observed to evolve toward shorter wavelengths, but this process stops at the ion gyroradius scale. There is no sign of an explosive nonlinear stage of the instability. The bulk flows produced by the mode are only moderate (<~ 200 km/s), and the instability is not observed to produce any topological change in the plasma sheet configuration.
Coroniti Ferdinan V.
Pritchett Philip L.
No associations
LandOfFree
Drift ballooning mode in a kinetic model of the near-Earth plasma sheet does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Drift ballooning mode in a kinetic model of the near-Earth plasma sheet, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Drift ballooning mode in a kinetic model of the near-Earth plasma sheet will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1502681