Other
Scientific paper
Jan 1995
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995angeo..13...38s&link_type=abstract
Annales Geophysicae (ISSN 0992-7689), vol. 13, no. 1, p. 38-44
Other
18
Acoustic Velocity, Auroral Echoes, Auroral Electrojets, Auroral Zones, E Region, Plasma Waves, Turbulence Models, Radar Echoes, Wave Generation, Wave Propagation
Scientific paper
Analysis of a simple model for two-stream weak fluid turbulence suggests a straightforward mechanism for the excitation of plasma wave modes whose phase velocities are roughly half the ion-acoustic speed. This slow wave is linearly stable but is excited through three-wave interaction with two other waves, at least one of which is an unstable two-stream wave. All three waves satisfy the linear dispersion relation. Careful consideration of the coupling coefficients and resonance conditions shows that the driven (linearly stable) modes have k-vectors that are perpendicular to the local magnetic field and are at some large angle to the Hall drift direction. These waves have phase velocities in the neighborhood of half the ion-acoustic speed and they could be responsible for type-3 radar echoes observed at 50 MHz. This mechanism cannot, however, generate fast waves moving at type-4 velocities.
Farley Donald T.
Sahr John D.
No associations
LandOfFree
Three-wave coupling in the auroral E-region 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 Three-wave coupling in the auroral E-region, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Three-wave coupling in the auroral E-region will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1818434