Saturation of the Farley-Buneman instability via nonlinear electron E×B drifts

Details Saturation of the Farley-Buneman instability via nonlinear electron E×B drifts Saturation of the Farley-Buneman instability via nonlinear electron E×B drifts

Aug 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996jgr...10117273o&link_type=abstract

Journal of Geophysical Research, Volume 101, Issue A8, p. 17273-17286

Physics

Geophysics

27

Ionosphere: Ionospheric Irregularities, Ionosphere: Plasma Waves And Instabilities, Ionosphere: Wave/Particle Interactions, Mathematical Geophysics: Numerical Solutions

Scientific paper

The Farley-Buneman instability is a collisional two-stream instability observed in the E region ionosphere at altitudes in the range 90-120 km. While linear theory predicts the dominant wavelengths, it cannot fully describe the behavior of this nonlinearly saturated instability, as observed by radar and rocket measurements. This paper explores the nonlinear behavior of this phenomenon and the resulting waves through simulations and theory. Our two-dimensional simulations model wave behavior in the plane perpendicular to the Earth's magnetic field, applying a fluid model to describe the electron dynamics and either a particle or a fluid model to describe ion behavior. The results show the growth, saturation, and nonlinear behavior of the instability for a much longer period of time than was possible with the pure particle codes used in previous studies. These simulations show (1) growth of Farley-Buneman waves, (2) the development of secondary waves which propagate along the extrema and perpendicular to the Farley-Buneman waves, (3) turning of the primary waves away from the electron drift direction, (4) a saturated wave phase velocity below the one predicted by linear theory but above the acoustic speed and (5) nonlinear electron E×B0 drifting dominates the behavior of the saturated waves. This paper describes both the simulation techniques and fundamental results. Additionally, this paper outlines a theory explaining the dominant nonlinear process seen in this instability.

Affiliated with

Also associated with

No associations

Rating

Saturation of the Farley-Buneman instability via nonlinear electron E×B drifts 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 Saturation of the Farley-Buneman instability via nonlinear electron E×B drifts, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Saturation of the Farley-Buneman instability via nonlinear electron E×B drifts will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-773258