Electrostatic ion cyclotron waves driven by a radial electric field
- 1 April 1991
- journal article
- Published by IOP Publishing in Plasma Physics and Controlled Fusion
- Vol. 33 (4), 375-388
- https://doi.org/10.1088/0741-3335/33/4/008
Abstract
An experiment was conducted in a single-ended Q-machine in which a voltage was applied to an electrode of variable diameter. For electrode diameters Di, field-aligned current-driven ion cyclotron waves were destabilized. If the electrode diameter was increased, a higher-frequency, lower-amplitude ion cyclotron wave was observed. The dispersion, mode amplitude and propagation characteristics of this mode were measured. The mode, which propagates azimuthally, was found to be driven by the radial electric field which exists at the edge of the current channel created by the biased electrode.Keywords
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