Electron cyclotron current drive on WT-III by a 56 GHz gyrotron |
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| Authors: | Y TERUMICHI H TANAKA A ANDO K OGURA S IDE M IIDA |
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| Affiliation: | Department of Physics, Faculty of Science , Kyoto University , Kyoto, 606, Japan |
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| Abstract: | Electron cyclotron current drive (EC-CD) experiments have been carried out at the fundamental and the second harmonics on the WT-III tokamak using extraordinary mode radiation at 56GHz launched from the low field side. The EC driven current of 24 kA is attained at the power level of 100 kW and the plasma with the density of 2 × 1012cm?3 and the electron temperature of several hundreds eV can be sustained during the EC pulse. The efficiency of EC-CD is 1·0 × 10?2 (1019m?2 A W?1) at the fundamental and 3·5 × 10?2 at the second harmonic. The unidirectional high energy electrons in the initial target plasma is necessary for EC-CD |
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