Influence of stationary driven helical current on the <i>m</i>=2/<i>n</i>=1 resistive tearing mode

Yun YUAN (袁赟); Xingqiang LU (路兴强); Jiaqi DONG (董家齐); Zhixiong HE (何志雄); Ruibo ZHANG (张睿博); Shijia CHEN (陈诗佳); Xueyu GONG (龚学余); Yun YUAN (袁赟); Xingqiang LU (路兴强); Jiaqi DONG (董家齐); Zhixiong HE (何志雄); Ruibo ZHANG (张睿博); Shijia CHEN (陈诗佳); Xueyu GONG (龚学余)

doi:10.1088/2058-6272/aafdc7

Plasma Science and Technology > 2019 > 21(5): 55101-055101. > DOI: 10.1088/2058-6272/aafdc7

Yun YUAN (袁赟), Xingqiang LU (路兴强), Jiaqi DONG (董家齐), Zhixiong HE (何志雄), Ruibo ZHANG (张睿博), Shijia CHEN (陈诗佳), Xueyu GONG (龚学余), Yun YUAN (袁赟), Xingqiang LU (路兴强), Jiaqi DONG (董家齐), Zhixiong HE (何志雄), Ruibo ZHANG (张睿博), Shijia CHEN (陈诗佳), Xueyu GONG (龚学余). Influence of stationary driven helical current on the m=2/n=1 resistive tearing mode[J]. Plasma Science and Technology, 2019, 21(5): 55101-055101. DOI: 10.1088/2058-6272/aafdc7

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Influence of stationary driven helical current on the m=2/n=1 resistive tearing mode

¹ School of Nuclear Science and Technology, University of South China, Hengyang 421001, People’s Republic of China
² College of Science, National University of Defense Technology, Changsha 410073, People’s Republic of China
³ Southwestern Institute of Physics, Center for Fusion Science, Chengdu 610041, People’s Republic of China
⁴ School of Mathematics and Physics, Fujian University of Technology, Fuzhou 350108, People’s Republic of China
⁵ Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People’s Republic of China

Funds: This work is supported by the National Key R&D Program of China (No. 2017YFE0302000), the Natural Science Foundation of Hunan Province (No. 2017JJ2230), National Natural Science Foundation of China (Nos. 11675073 and 11375085), and the Key Laboratory of Magnetic Confinement Nuclear Fusion Research in Hengyang (2018KJ108).

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Received Date: September 25, 2018

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Abstract

Abstract

The influence of stationary driven helical current on tearing mode instability in the m=2/n=1 rational surface is explored numerically using resistive magnetohydrodynamic simulation in cylindrical geometry. The results indicate that the flip instabilities result from the sustained injection of the sufficiently strong helical current driven in the island O-point. The driven helical current induces high order harmonics of instabilities due to the delay of suppressing timing and the increase of its current intensity. With the appropriate current density values, the development of the perturbed kinetic energy can be limited and the occurrence of the flip instabilities can be delayed for a long time. The radial deviation of the current deposition can lead to poor inhibition effect, and the effect of current bias on the boundary is greater than that on the axis.
- tearing modes,
- helical current,
- MHD instability

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Influence of stationary driven helical current on the m=2/n=1 resistive tearing mode