Abstract
The operational windows of the low-frequency dissipative instabilities in the Hanbit magnetic mirror device are investigated experimentally in a simple mirror con guration. Both the electron drift wave and the interchange mode are stabilized by nonlinear interactions with the sideband waves that originate from nonlinear beating between the plasma modes and texternally driven radio-frequency (rf) waves. Typically, both modes are stabilized near the fundamental ion cyclotron resonance condition as the external rf power and magnetic eld increase, which is in good agreement with theoretical prediction based on twouid plasma dispersion. The onset characteristics of the two modes are also found to depend on the neutral gas pressure; the drift waves are observed at lower pressure, in contrast to the interchange mode, which is found at higher neutral pressure.
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