Surface and Bulk Waves on Axially Magnetized Plasma Columns

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Abstract
The dispersion relation and field solutions of slow electromagnetic waves propagating along a cold, collisionless, cylindrical plasma in an axial magnetic field of finite magnitude are studied numerically. Field distribution and gradual metamorphosis of surface waves into bulk waves along the dispersion characteristics are investigated. It is shown that both surface waves and bulk waves belong to the same set of plasma modes. Criteria concerning conditions under which surface waves occur are extended in include transitional situations. Power‐flow density along the plasma may in certain cases be in opposite directions inside and outside of the plasma, both for forward surface waves as well as for backward cyclotron waves, implying transfer of energy between propagation media.

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