Plasma and Fusion Research
Volume 7, 1202005 (2012)
Rapid Communications
- Graduate School of Energy Science, Kyoto University, Kyoto 606-8502, Japan
Abstract
Effects of a radial magnetic perturbation (MP) on electron cyclotron (EC) driven fast electrons are investigated in the Low Aspect ratio Torus Experiment (LATE) device. When a weak MP is applied to plasmas maintained solely by EC heating and current drive, plasma current and electron density increase, whereas energetic trapped electrons located outside the last closed flux surface (LCFS) on the low field side (LFS) decrease. The effect of MPs on energetic trapped electrons has an important role in improving EC-driven plasma discharges.
Keywords
Radial magnetic perturbation, spherical tokamak, electron cyclotron heating, current drive, fast electron, energetic passing electron, energetic trapped electron, LATE
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This paper may be cited as follows:
Fumitake WATANABE, Masaki UCHIDA, Hitoshi TANAKA and Takashi MAEKAWA, Plasma Fusion Res. 7, 1202005 (2012).