Excitation and Stabilization of Collisional Drift Instability by Electron Density Modulation. II

Abstract

The excitation, dynamic and feedback stabilizations of a collisional drift instability by means of the electron density modulation around its frequency are analyzed systematically by using nonlinear fluid equations for ions and electrons, where mode coupling effects are considered. The theoretical treatments are extended from the finite-amplitude collisional drift wave theory described by Stix. Comparison between these results and the experimental observations on the excitation and stabilizations of the drift instabilities shows qualitative agreement.