Effects of resonant magnetic perturbation on locked mode of neoclassical tearing modes

Weikang TANG (汤炜康); Lai WEI (魏来); Zhengxiong WANG (王正汹); Jialei WANG (王佳磊); Tong LIU (刘桐); Shu ZHENG (郑殊)

doi:10.1088/2058-6272/ab0a18

Plasma Science and Technology > 2019 > 21(6): 65103-065103. > DOI: 10.1088/2058-6272/ab0a18

Weikang TANG (汤炜康), Lai WEI (魏来), Zhengxiong WANG (王正汹), Jialei WANG (王佳磊), Tong LIU (刘桐), Shu ZHENG (郑殊). Effects of resonant magnetic perturbation on locked mode of neoclassical tearing modes[J]. Plasma Science and Technology, 2019, 21(6): 65103-065103. DOI: 10.1088/2058-6272/ab0a18

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Effects of resonant magnetic perturbation on locked mode of neoclassical tearing modes

Key Laboratory of Materials Modification by Laser, Ion, and Electron Beams (Ministry of Education), School of Physics, Dalian University of Technology, Dalian 116024, People's Republic of China

Funds: This work was supported by the National Key R&D Program of China (Nos. 2017YFE0301900 and 2017YFE0301100), National Natural Science Foundation of China (No. 11675083), the Fundamental Research Funds for the Central Universities (Nos. DUT18ZD101 and DUT17LK38), and the Dalian Youth Science and Technology Project Support Program (No. 2015R01).

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Received Date: December 11, 2018

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Abstract

Abstract

The effects of externally applied resonant magnetic perturbation (RMP) on the locked mode of the neoclassical tearing mode (NTM) are numerically investigated by means of a set of reduced magnetohydrodynamic equations. It is found that, for a small bootstrap current fraction, three regimes, namely the slight suppression regime, the small locked island (SLI) regime and the big locked island (BLI) regime, are discovered with the increase of RMP strength. For a much higher bootstrap current fraction, however, a new oscillation regime appears instead of the SLI regime, although the other regimes still remain. The physical process in each regime is analyzed in detail based on the phase difference between the NTM and the RMP. Moreover, the critical values of the RMP in both SLI and BLI regimes are obtained, and their dependence on key plasma parameters is discussed as well.
- neoclassical tearing mode,
- resonant magnetic perturbation,
- locked mode

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Effects of resonant magnetic perturbation on locked mode of neoclassical tearing modes

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