Verification of gyrokinetic particle simulation of current-driven instability in fusion plasmas. IV. Drift-tearing mode

Shi, Hao; Zhang, Wenlu; Feng, Hongying; Lin, Zhihong; Dong, Chao; Bao, Jian; Li, Ding

doi:10.1063/1.5116332

Title: Verification of gyrokinetic particle simulation of current-driven instability in fusion plasmas. IV. Drift-tearing mode

Journal Article · 27 September 2019 · Physics of Plasmas

DOI: https://doi.org/10.1063/1.5116332 · OSTI ID:1577612

Shi, Hao ^[1];

^[2]; Feng, Hongying ^[3];

^[4]; Dong, Chao ^[5]; Bao, Jian ^[5]; Li, Ding ^[1]

Univ. of Science and Technology of China, Hefei (China); Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Laboratory for Condensed Matter Physics and CAS Key Laboratory of Soft Matter Physics, Institute of Physics, Chinese Academy of Sciences; Univ.of Chinese Academy of Sciences, Beijing (China)
Univ. of Science and Technology of China, Hefei (China); Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Laboratory for Condensed Matter Physics and CAS Key Laboratory of Soft Matter Physics, Institute of Physics, Chinese Academy of Sciences; Univ.of Chinese Academy of Sciences, Beijing (China); Songshan Lake Materials Lab., Dongguan, Guangdong (China)
Univ. of Science and Technology of China, Hefei (China); Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Laboratory for Condensed Matter Physics and CAS Key Laboratory of Soft Matter Physics, Institute of Physics, Chinese Academy of Sciences; Univ.of Chinese Academy of Sciences, Beijing (China); China Three Gorges Univ., Yichang, Hubei (China)
Univ. of California, Irvine, CA (United States)
Chinese Academy of Sciences (CAS), Beijing (China). Beijing National Laboratory for Condensed Matter Physics and CAS Key Laboratory of Soft Matter Physics, Institute of Physics, Chinese Academy of Sciences; Univ.of Chinese Academy of Sciences, Beijing (China)

Here, the drift-tearing instability due to diamagnetic drift effects is verified using the Gyrokinetic Toroidal Code (GTC). First, the classical (2,1) resistive tearing mode is verified in a cylindrical geometry with a fluid model. The dependence of the growth rate of the resistive tearing mode on the beta value of the plasma is obtained and is found to qualitatively agree with the theoretical prediction. A drift-tearing mode is subsequently generated when the equilibrium pressure gradient is significant. In this mode, diamagnetic drift effects result in a reduced growth rate and a real frequency equal to the electron diamagnetic frequency. The scaling relation between the diamagnetic frequency and the growth rate of the drift-tearing mode has been calculated. Lastly, this relation shows good agreement with the theoretical prediction for a relatively small resistivity; however, an obvious deviation arises when the resistivity is large.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)

Sponsoring Organization:: USDOE Office of Science (SC)

OSTI ID:: 1577612

Journal Information:: Physics of Plasmas, Vol. 26, Issue 9; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 4 works

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