Plasma and Fusion Research

Volume 16, 2403047 (2021)

Regular Articles

Three-Dimensional Nonlinear Modeling of MHD Instabilities for Low-q Plasma on J-TEXT
Jie HUANG1), Yasuhiro SUZUKI1,2) and J-TEXT Team3)
1)
National Institute for Fusion Science, 322-6 Oroshi-cho, Toki 509-5292, Japan
2)
The Graduate University for Advanced Studies, SOKENDAI, 322-6 Oroshi-cho, Toki 509-5292, Japan
3)
International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics, Huazhong University of Science and Technology, Wuhan 430074, China
(Received 16 November 2020 / Accepted 2 February 2021 / Published 9 April 2021)

Abstract

The characteristics of the magnetohydrodynamics (MHD) instabilities for low edge safety factor (low-q) plasma are investigated on J-TEXT with three-dimensional (3D) nonlinear MHD Infrastructure for Plasma Simulation (MIPs) code. The dynamics of m = 2 mode coupling with m = 1 mode is found in the linear growth phase with the initial qaxis < 1 equilibrium. And new 3D helical coils are designed for generating additional rotational transform based on the J-TEXT configuration, which is helpful to suppress the amplitude of the MHD instabilities from the modeling result.

Keywords

magnetohydrodynamics, nonlinear instability, tokamak, rotational transform, helical coil

DOI: 10.1585/pfr.16.2403047

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