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(CDP/06) Sawtooth control by on-axis electron cyclotron current drive on the WT-3 tokamak

M. Asakawa, K. Tanabe, A. Nakayama1, M. Watanabe1, M. Nakamura2, H. Tanaka1, T. Maekawa1, Y. Terumichi

Department of Physics, Faculty of Science, Kyoto University, Kyoto 606-8502, Japan
1 Present address: Department of Fundamental Energy Science, Graduate School of Energy Science, Kyoto University, Kyoto 606-8502, Japan
2 Present address: Osaka Institute of Technology, Osaka 535, Japan

Abstract.  The experiments on control of sawtooth oscillations (STO) by electron cyclotron current drive (ECCD) have been performed on the WT-3 tokamak. Stabilization and excitation of STO are observed for counter-ECCD and co-ECCD, respectively, when the position of the power deposition is located inside the inversion radius. These results are due to the modification of the current profile near the magnetic axis.

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IAEA 2001