Physics – Plasma Physics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm51c..02d&link_type=abstract
American Geophysical Union, Fall Meeting 2009, abstract #SM51C-02
Physics
Plasma Physics
[2753] Magnetospheric Physics / Numerical Modeling, [2772] Magnetospheric Physics / Plasma Waves And Instabilities, [2774] Magnetospheric Physics / Radiation Belts, [7867] Space Plasma Physics / Wave/Particle Interactions
Scientific paper
On July 24, 2003, when the Cluster satellites crossed the magnetic equator at about 4.5 RE radial distance on the dusk side (~ 15 MLT) emissions were observed below the local electron gyrofrequency in two bands, one band above one-half the gyrofrequency and the other band below one-half the gyrofrequency, which is typical of chorus emissions propagating in the whistler wave mode. A careful analysis of the emissions for this event has shown that Cluster passed through the wave generation region. Simultaneous electron particle data from the PEACE instrument in the generation region indicated the presence of a mid-energy electron population (~ 100’s of eV) that had a highly anisotropic temperature distribution with the perpendicular temperature about 10 times the parallel temperature. To understand this event in which the satellite passed directly through the whistler wave generation region and in which the free energy source (i.e., temperature anisotropy) was readily identified, a linear theory and particle in cell simulation study has been carried out to understand the physics of the wave generation, saturation and energy redistribution. The theoretical results show that for this event the anisotropic electron distribution can linearly excite obliquely propagating whistler mode waves in the upper band, i.e., greater than one-half the electron gyrofrequency. Non-linear processes excite waves in the lower band, i.e., less than one-half the electron gyrofrequency. The instability saturates by a combination of a decrease in the anisotropy of the mid-energy electrons as well as by heating of the cold electron population.
Ashour-Abdalla Maha
Coroniti Ferdinan V.
David Winningham J.
Decyk Viktor
Goldstein Michel L.
No associations
LandOfFree
Generation of Whistler Chorus Emissions and Resulting Wave-Particle Interactions 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 Generation of Whistler Chorus Emissions and Resulting Wave-Particle Interactions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Generation of Whistler Chorus Emissions and Resulting Wave-Particle Interactions will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1881199