Free Energy to Drive the Magnetosonic Instability at Geosynchronous Orbit

Details Free Energy to Drive the Magnetosonic Instability at Geosynchronous Orbit Free Energy to Drive the Magnetosonic Instability at Geosynchronous Orbit

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsm13c..08t&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SM13C-08

Physics

[2764] Magnetospheric Physics / Plasma Sheet, [2772] Magnetospheric Physics / Plasma Waves And Instabilities

Scientific paper

Equatorial magnetosonic waves have recently been suggested as a possible means for accelerating radiation-belt electrons. The theoretical criterion for growth of such waves is the presence of a positive slope in the hot-proton distribution function near the Alven speed in the direction perpendicular to the magnetic field. Recent analyses of the storm-time ring-current ion distributions predicted by the RAM model show that the energy-dependent drifts and losses of injected ions can produce free energy suitable to drive the magnetosonic instability. Moreover, a recent case study of ion observations at geosynchronous orbit likewise reveals conditions appropriate for magnetosonic wave growth. We have now conducted a survey of the occurrence frequency of regions of positive slope in the perpendicular hot-ion (1-45 keV) distribution observed at geosynchronous orbit by the LANL MPA instrument. The survey covers more than a full solar cycle and thus includes a wide range of magnetospheric activity levels. We present statistical results from this survey that characterize the locations and conditions for which free energy exists in the hot-ion population at geosynchronous orbit that could potentially give rise to magnetosonic waves.

Affiliated with

Also associated with

No associations

Rating

Free Energy to Drive the Magnetosonic Instability at Geosynchronous Orbit 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 Free Energy to Drive the Magnetosonic Instability at Geosynchronous Orbit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Free Energy to Drive the Magnetosonic Instability at Geosynchronous Orbit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1467555