Physics – Plasma Physics
Scientific paper
Sep 1994
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jgr....9917623h&link_type=abstract
Journal of Geophysical Research, Volume 99, Issue A9, p. 17623-17630
Physics
Plasma Physics
4
Space Plasma Physics: Turbulence, Space Plasma Physics: Nonlinear Phenomena, Ionosphere: Active Experiments, Ionosphere: Plasma Waves And Instabilities
Scientific paper
Langmuir turbulence during ionospheric heating experiments is studied by a model which treats the low-frequency ion dynamics from a linearized kinetic description, where the usual high frequency Zakharov equation describing the electron dynamics is retained. The main objective is to compare the predictions from this model with results previously obtained from quasi-fluid Zakharov models. Our findings are that the predictions from the two types of models are in good qualitative agreement. At high values of the frequency mismatch and moderate values of the driving electric field, the saturated dynamics is cascade-dominated, while at lower-frequency mismatch, that is, nearer to the reflection height, or at higher drive, the dynamics is of the cavitation type. In cascade dominated cases the perturbation of the ion velocity distribution is mainly around the ion acoustic velocity, while in cavitation-dominated cases the whole velocity range is perturbed.
Helmersen Erlend
Mjølhus Einar
No associations
LandOfFree
A semikinetic model for ionospheric Langmuir turbulence 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 A semikinetic model for ionospheric Langmuir turbulence, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A semikinetic model for ionospheric Langmuir turbulence will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1791460