Alfvén Ion-Cyclotron Instability: Its Physical Mechanism and Observation in Computer Simulation

Abstract
The physical mechanism of the Alfvén ion-cyclotron instability due to ion-temperature anisotropy in a high-β plasma is explored. We have observed evidence for the proposed mechanism in runs on a magnetostatic particle simulation code. Saturation and stabilization of the instability are discussed on the basis of the present mechanism.