Abstract
The toroidal current has been rapidly ramped-up after the formation of an initial closed flux surface in an electron cyclotron heated discharge in the low aspect ratio torus experiment device. A current carrying fast electron tail is developed well beyond the runaway velocity against the reverse voltage from self-induction, suggesting a forward driving force on the tail by the cyclotron absorption of high electron Bernstein waves.
- Received 3 May 2009
DOI:https://doi.org/10.1103/PhysRevLett.104.065001
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