Instabilities of ideal magnetohydrodynamics mode and neoclassical tearing mode stabilization by electron cyclotron current drive for EHL-2 spherical torus

Lili DONG; Li LI; Wenjun LIU; Tong LIU; Yunfeng LIANG; Jiaqi DONG; Huasheng XIE; Yuejiang SHI; the EHL-2 Team

doi:10.1088/2058-6272/ada421

Plasma Science and Technology > 2025 > 27(2): 024006. > DOI: 10.1088/2058-6272/ada421 CSTR: 32219.14.2058-6272/ada421

Lili DONG, Li LI, Wenjun LIU, Tong LIU, Yunfeng LIANG, Jiaqi DONG, Huasheng XIE, Yuejiang SHI, the EHL-2 Team. Instabilities of ideal magnetohydrodynamics mode and neoclassical tearing mode stabilization by electron cyclotron current drive for EHL-2 spherical torus[J]. Plasma Science and Technology, 2025, 27(2): 024006. DOI: 10.1088/2058-6272/ada421

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Instabilities of ideal magnetohydrodynamics mode and neoclassical tearing mode stabilization by electron cyclotron current drive for EHL-2 spherical torus

1.
Hebei Key Laboratory of Compact Fusion, Langfang 065001, People’s Republic of China
2.
ENN Science and Technology Development Co., Ltd., Langfang 065001, People’s Republic of China
3.
College of Science, Donghua University, Shanghai 201620, People’s Republic of China
4.
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
5.
Forschungszentrum Jülich GmbH, Institute of Fusion Energy and Nuclear Waste Management-Plasma Physics, Partner of the Trilateral Euregio Cluster (TEC), Jülich 52425, Germany
6.
Southwestern Institute of Physics, Chengdu 610041, People’s Republic of China

More Information

Author Bio:
Lili DONG: donglilib@enn.cn
Corresponding author:
Lili DONG, donglilib@enn.cn
Received Date: October 20, 2024
Revised Date: December 29, 2024
Accepted Date: December 29, 2024
Available Online: December 30, 2024
Published Date: February 12, 2025

Graphical Abstract

Abstract

Abstract

The next generation fusion device listed on ENN’s fusion roadmap, named as (ENN He-Long) EHL-2, is under both physics and engineering designs. The instabilities of ideal magnetohydrodynamics (MHD) mode and neoclassical tearing mode (NTM) stabilized by electron cyclotron current drive (ECCD) for EHL-2’s two typical operation scenarios are analyzed. For high-ion-temperature operating (HITO) scenario, the vertical displacement event (VDE) could be a big challenge to the device safety. For the steady-state operating (SSO) scenario, the limitation may rise from the ideal MHD mode, NTM, etc. This suggests that the MHD analysis of both operation scenarios should be done with different focusing. Preliminary analysis based on the current physics and engineering design of both two scenarios is given in this paper. Based on the analysis result of above, the future assessments might target at active control method and the effect of boron on MHD activities.
- MHD,
- magnetic fusion,
- macro-instability

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Acknowledgment

The authors are very grateful for the supports from the ENN team, Qingquan Yu, and the developers of both MARS-F and MDC codes.

References (44)

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