The current driven by combined electron cyclotron wave (ECW) and high harmonic fast wave is investigated using the GENRAY/CQL3D package. It is shown that no significant synergetic current is found in a range of cases with a combined ECW and fast wave (FW). This result is consistent with a previous study [Harvey et al., in Proceedings of IAEA TCM on Fast Wave Current Drive in Reactor Scale Tokamaks (Synergy and Complimentarily with LHCD and ECRH), Arles, France, IAEA, Vienna, 1991]. However, a positive synergy effect does appear with the FW in the lower hybrid range of frequencies. This positive synergy effect can be explained using a picture of the electron distribution function induced by the ECW and a very high harmonic fast wave (helicon). The dependence of the synergy effect on the radial position of the power deposition, the wave power, the wave frequency, and the parallel refractive index is also analyzed, both numerically and physically.
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December 2016
Research Article|
December 06 2016
Current drive with combined electron cyclotron wave and high harmonic fast wave in tokamak plasmas
J. C. Li;
J. C. Li
1School of Nuclear Science and Technology,
University of South China
, Hengyang, Hunan 421001, People's Republic of China
2FSC and State Key Lab of Nuclear Physics and Technology, Department of Physics,
Peking University
, Beijing 100871, People's Republic of China
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X. Y. Gong;
X. Y. Gong
a)
1School of Nuclear Science and Technology,
University of South China
, Hengyang, Hunan 421001, People's Republic of China
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J. Q. Dong;
J. Q. Dong
3
Southwestern Institute of Physics
, P O Box 432, Chengdu 610041, People's Republic of China
4Institute for Fusion Theory and Simulation,
Zhejiang University
, Hangzhou 310058, People's Republic of China
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J. Wang;
J. Wang
3
Southwestern Institute of Physics
, P O Box 432, Chengdu 610041, People's Republic of China
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N. Zhang;
N. Zhang
3
Southwestern Institute of Physics
, P O Box 432, Chengdu 610041, People's Republic of China
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P. W. Zheng;
P. W. Zheng
5School of Environmental Protection and Safety Engineering,
University of South China
, Hengyang 421001, People's Republic of China
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C. Y. Yin
C. Y. Yin
1School of Nuclear Science and Technology,
University of South China
, Hengyang, Hunan 421001, People's Republic of China
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a)
E-mail: gongxueyu@126.com
Phys. Plasmas 23, 122504 (2016)
Article history
Received:
July 24 2016
Accepted:
November 21 2016
Citation
J. C. Li, X. Y. Gong, J. Q. Dong, J. Wang, N. Zhang, P. W. Zheng, C. Y. Yin; Current drive with combined electron cyclotron wave and high harmonic fast wave in tokamak plasmas. Phys. Plasmas 1 December 2016; 23 (12): 122504. https://doi.org/10.1063/1.4971442
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