Modeling of the influences of multiple modulated electron cyclotron current drive on NTMs in rotating plasma

Long CHEN (陈龙); Jinyuan LIU (刘金远); Ping DUAN (段萍); Guangrui LIU (刘广睿); Xingyu BIAN (边兴宇)

doi:10.1088/2058-6272/19/2/024002

Plasma Science and Technology > 2017 > 19(2): 24002-024002. > DOI: 10.1088/2058-6272/19/2/024002

Long CHEN (陈龙), Jinyuan LIU (刘金远), Ping DUAN (段萍), Guangrui LIU (刘广睿), Xingyu BIAN (边兴宇). Modeling of the influences of multiple modulated electron cyclotron current drive on NTMs in rotating plasma[J]. Plasma Science and Technology, 2017, 19(2): 24002-024002. DOI: 10.1088/2058-6272/19/2/024002

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Modeling of the influences of multiple modulated electron cyclotron current drive on NTMs in rotating plasma

1 Department of Physics, Dalian Maritime University, Dalian 116026, People’s Republic of China 2 Transportation Engineering Postdoctoral Research Station, Dalian Maritime University, Dalian 116026, People’s Republic of China 3 School of Physics and Optoelectronic Engineering, Dalian University of Technology, Dalian 116024, People’s Republic of China

Funds: This work is supported by National Natural Science Foundation of China (Grand Nos. 11605021, 11375039 and 11275034), Natural Science Foundation of Liaoning Province (Grand No. 201601074) and supported by ‘the Fundamental Research Funds for the Central Universities' (Grand Nos. 3132016128 and 3132014328).

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Received Date: July 13, 2016

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Abstract

Abstract

In this work, physical models of neoclassical tearing modes (NTMs) including bootstrap current and multiple modulated electron cyclotron current drive model are applied. Based on the specific physical problems during the suppression of NTMs by driven current, this work compares the efficiency of continuous and modulated driven currents, and simulates the physical processes of multiple modulated driven currents on suppressing rotating magnetic island. It is found that when island rotates along the poloidal direction, the suppression ability of continuous driven current can be massively reduced due to current deposition outside the island separatrix and reverse deposition direction at the X point, which can be avoided by current drive modulation. Multiple current drive has a better suppressing effect than single current drive. This work gives realistic numerical simulations by optimizing the model and parameters based on the experiments, which could provide references for successful suppression of NTMs in future advanced tokamak such as international thermonuclear experimental reactor.
- neoclassical tearing modes,
- magnetic island,
- current drive,
- modulated rf wave,
- plasma rotation

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References (44)

References

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