Rapid Current Ramp-Up by Cyclotron-Driving Electrons beyond Runaway Velocity

M. Uchida, T. Yoshinaga, H. Tanaka, and T. Maekawa
Phys. Rev. Lett. 104, 065001 – Published 8 February 2010

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 N electron Bernstein waves.

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  • Received 3 May 2009

DOI:https://doi.org/10.1103/PhysRevLett.104.065001

©2010 American Physical Society

Authors & Affiliations

M. Uchida, T. Yoshinaga*, H. Tanaka, and T. Maekawa

  • Graduate School of Energy Science, Kyoto University, Kyoto 606-8502, Japan

  • *Present Address: National Institute for Fusion Science, Toki, Gifu 509-5292, Japan

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Issue

Vol. 104, Iss. 6 — 12 February 2010

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