Rapid current ramp-up by cyclotron-driving electrons beyond runaway velocity.
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(parallel) electron Bernstein waves.
Uchida
M
M
Graduate School of Energy Science, Kyoto University, Kyoto 606-8502, Japan.
Yoshinaga
T
T
Tanaka
H
H
Maekawa
T
T