Control of Radial Potential Profile and Nonambipolar ion Transport in an Electron Cyclotron Resonance Mirror Plasma

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Abstract
A radial profile of plasma potential is successfully controlled by the use of circular concentric segmented electrodes at both ends in a simple axisymmetric electron cyclotron resonance mirror plasma. An enhancement of radial nonambipolar ion transport is clearly observed under a condition where the ion Larmor motion is strongly modified by a radial electric field directed outward.