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Published on: May 3, 2019
Ion heating and high-energy-particle production by ion-cyclotron heating in the large helical device
1National Institute for Fusion Science, 322-6 Oroshi-cho, Toki, 509-5292 Japan.
Abstract:
Ion-cyclotron heating was applied to the Large Helical Device. When the proton-cyclotron resonance was near the saddle point of the magnetic field-strength plane, strong ion-cyclotron damping occurred. Under these conditions efficient plasma heating was achieved for more than one minute. A high-energy ion tail was observed, and the effective tail temperature was determined by a balance between the wave acceleration and the electron-drag relaxation. There was no apparent sign of particle orbit loss effect in the investigated density range of 0.8-1.3x10(19) m(-3).
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