Linear hybrid simulations of low-frequency fishbone instability driven by energetic passing particles in tokamak plasmas

Jixing YANG; Guoyong FU; Wei SHEN; Minyou YE

doi:10.1088/2058-6272/ac5972

Plasma Science and Technology > 2022 > 24(6): 065101. > DOI: 10.1088/2058-6272/ac5972

Jixing YANG, Guoyong FU, Wei SHEN, Minyou YE. Linear hybrid simulations of low-frequency fishbone instability driven by energetic passing particles in tokamak plasmas[J]. Plasma Science and Technology, 2022, 24(6): 065101. DOI: 10.1088/2058-6272/ac5972

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Linear hybrid simulations of low-frequency fishbone instability driven by energetic passing particles in tokamak plasmas

1.
School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230026, People's Republic of China
2.
Institute for Fusion Theory and Simulation and Department of Physics, Zhejiang University, Hangzhou 310027, People's Republic of China
3.
Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, People's Republic of China

More Information

Corresponding author:
Guoyong FU, E-mail: gyfu@zju.edu.cn

Minyou YE, E-mail: yemy@ustc.edu.cn
Received Date: November 09, 2021
Revised Date: February 24, 2022
Accepted Date: February 28, 2022
Available Online: December 12, 2023
Published Date: May 18, 2022

Graphical Abstract

Abstract

Abstract

A linear simulation study of energetic passing particle-driven low-frequency fishbone instability in tokamak plasmas has been carried out using the global kinetic-MHD (magnetohydrodynamics) hybrid code M3D-K. This work is focused on the interaction of energetic passing beam ions and n=1 mode with a monotonic safety factor q profile and $q_{0} < 1 .$ Specifically, the stability and mode frequency as well as mode structure of the n=1 mode are calculated for scans of parameter values of beam ion beta, beam ion injection energy, beam ion orbit width, beam ion beta profile, as well as background plasma beta. The excited modes are identified as a low-frequency fishbone with the corresponding resonance of $ω_{ϕ} + ω_{θ} = ω,$ where $ω_{ϕ}$ is the beam ion toroidal transit frequency and $ω_{θ}$ is the beam ion poloidal transit frequency. The simulated mode frequency is approximately proportional to the beam ion injection energy and beam ion orbit width. The mode structure is similar to that of internal kink mode. These simulation results are similar to the analytic theory of Yu et al.
- fishbone,
- energetic particle,
- hybrid simulations,
- tokamak

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Acknowledgments

We thank Dr Feng Wang for useful discussions and for help with the use of the M3D-K code. This work is supported by the National MCF Energy R & D Program of China (Nos. 2019YFE03030004 and 2019YFE03050001) and National Natural Science Foundation of China (Nos. 11975232 and 11975270). Numerical simulations were carried out using the CFETR Integration Design Platform (CIDP) with the support of the Supercomputing Center of the University of Science and Technology of China. Part of the numerical simulations were carried out using the Qilin supercomputer #2 of the Institute for Fusion Theory and Simulation, Zhejiang University.

References (17)

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