Plasma and Fusion Research
Online ISSN : 1880-6821
ISSN-L : 1880-6821
Rapid Communications
Experimental Study of Plasma Breakdown by Toroidally Injected Electron Cyclotron Waves in Heliotron J
Bo LUKazunobu NAGASAKITohru MIZUUCHIHiroyuki OKADATakashi MINAMIShinji KOBAYASHISatoshi YAMAMOTOShinsuke OHSHIMAShigeru KONOSHIMAFumimichi SANO
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2012 Volume 7 Pages 1202153

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Abstract

Plasma breakdown using electron cyclotron waves with toroidally inclined launch has been studied experimentally in the stellarator/heliotron device, Heliotron J. The experimental results show that the second harmonic X-mode breakdown has a weak dependence on the parallel refractive index, Nll, for the small toroidal injection angle range. When the fundamental resonance exists inside the vacuum chamber, the breakdown occurs quickly, independent of the toroidal injection angle.

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© 2012 by The Japan Society of Plasma Science and Nuclear Fusion Research
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