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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. Nakayama ¹, M. Watanabe ¹, M. Nakamura ², H. Tanaka ¹, T. Maekawa ¹, 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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