Perpendicular particle simulation of the E region Farley-Buneman instability

摘要: We study the stabilization and nonlinear quasi-steady state of E region Farley-Buneman waves. limit ourselves to two-dimensional, fully perpendicular case. use a two-dimensional explicit particle simulation code with neutral collisions. Since both coordinates are included, we can dependence temporal power spectra backscattered on flow angle. Unlike fluid codes in general, present method is not limited small ambient electric field values. It found that phase velocity roughly obeys linear theory: no saturation ion acoustic speed seen. However, spatial spectrum asymmetric as function angle if above threshold. This nonzero propagation most important new result. The intense waves propagate at k · < 0 edge linearly unstable sector, close speed. No evidence anomalous wave heating found.