Abstract
In this paper we present a self-consistent analysis of steady-state current generation by nonlinear mixing of Alfvén waves in a resistive incompressible plasma slab. In the model, the low-frequency waves are excited inside the plasma using external electric and magnetic current sheet antennas. Since the plasma medium is nonlinear, the first-order primary waves beat together with each other, and generate a second-order steady-state longitudinal current. The steady-state current density is computed self-consistently in the analysis using Ampère’s law. Several antenna configurations and current production schemes are explored. It is shown that it is possible to drive reasonably large steady-state currents in the plasma using waves with a modest amplitude. Methods for controlling the current characteristics by means of the antenna parameters are also studied.
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