Understanding the spectrum during the tearing mode locking by rotating RMP in J-TEXT
Source abstract
Abstract
The rotating resonant magnetic perturbation (RMP) could lock the tearing mode (TM) and prevent disruption. It is found that the TM instantaneous frequency oscillates during TM locking on the RMP. In this work, the TM frequency oscillation was derived analytically based on the toroidal torque balance, which was verified experimentally. It is found that two peaks with higher frequency (2fTM0-fRMP) and lower frequency (fRMP) occurred in the spectrum when the window width of FFT was shorter than the TM frequency oscillating period. Those two peaks were explained analytically based on the description of TM instantaneous frequency. The independence of the temporal information and the spatial information of the TM was explained analytically and verified by the spatial structure analysis of each peaks. This work is important for mode structure identification and provides a scheme for mode coupling control.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Magnetic confinement fusion research · Ionosphere and magnetosphere dynamics · Particle accelerators and beam dynamics
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics, State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology 1 , Wuhan 430074, People’s Republic of China
Laboratory of Low frequency Electromagnetic Communication Technology with the Wuhan Maritime Communication Research Institute, China State Shipbuilding Corporation Limited 2 , Wuhan 430205, People’s Republic of China
Department of Physics, Federal University Dutse 3 , Jigawa 720101, Nigeria
Department of Physics, Huazhong University of Science and Technology 4 , Wuhan 430074, People’s Republic of China
Funding
National Key Research and Development Program of China · National Natural Science Foundation of China · Fundamental Research Funds for the Central Universities
References (39)
Show source-provided references
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