Multiple Excitation of Lower-Hybrid Drift Waves in the Neutral Sheet

Abstract

A numerical simulation of the lower-hybrid drift instability is carried out in which an electric drift toward the neutral sheet is present. It is found that lower-hybrid drift waves, which are excited usually in a transient fashion and decay to a low level in a closed system, are reexcited and execute recurrent growth in the presence of particle drift toward the neutral sheet. Consequently, anomalous resistivity also exhibits a recurrent generation.