Low-frequency Oscillation of a Bounded Plasma in an External Magnetic Field

Abstract

Low-frequency plasma waves with non-axisymmetric modes are generally analyzed under the existence of an ion beam. A boundary condition, that a cylindrical plasma is coaxially immersed in a cylindrical current sheet with a vacuum clearance, is taken into account. Oscillating electromagnetic field and electron and ion motions associated with the waves are also examined. Natural oscillations with a free boundary and cylindrical plasma waves surrounded by a conducting cylinder are found to exist. Ion cyclotron waves of axisymmetric modes found by Stix can be derived as a special case of these modes.