Physics – Plasma Physics
Scientific paper
Feb 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010jgra..11502310p&link_type=abstract
Journal of Geophysical Research, Volume 115, Issue A2, CiteID A02310
Physics
Plasma Physics
4
Space Plasma Physics: Turbulence (4490), Space Plasma Physics: Nonlinear Phenomena (4400, 6944), Space Plasma Physics: Kinetic Waves And Instabilities, Ionosphere: Wave/Particle Interactions (7867), Ionosphere: Ionospheric Disturbances
Scientific paper
Ion-acoustic enhancements are investigated within the context of turbulent beam-plasma interaction processes. The analysis assumes a pair of counterstreaming electron beams interacting with the background plasma. Two-dimensional velocity space and two-dimensional wave number space are assumed for the analysis, with physical parameters that characterize typical ionospheric conditions. The solutions of the electrostatic weak turbulence theory show that the ion-acoustic wave levels are significantly enhanced when the computation is initialized with a pair of counterstreaming beams in contrast to a single beam. We suggest that this finding is highly relevant for the observed ion-acoustic enhancements in the Earth's ionosphere that are known to be correlated with auroral activity.
Gaelzer R.
Pavan John
Yoon Peter H.
Ziebell L. F.
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