Influence of finite ion Larmor radius and equilibrium self electric fields on the ion resonance instability

Abstract

The influence of finite ion Larmor radius and equilibrium self-electric fields on the ion resonance instability in a non-neutral plasma column is examined, and a closed algebraic dispersion relation for the complex eigenfrequency omega is obtained. It is shown that finite ion Larmor radius effects can have a strong stabilizing influence for azimuthal mode numbers l>or=2, particularly when the equilibrium self electric field is sufficiently weak.