https://doi.org/10.1140/epjs/s11734-025-01684-y
Regular Article
Modeling of 
= 3 resistive wall mode control in CFETR
1
Sichuan University, 610065, Chengdu, People’s Republic of China
2
Southwestern Institute of Physics, PO Box 432, Chengdu, People’s Republic of China
Received:
25
January
2025
Accepted:
12
May
2025
Published online:
27
May
2025
MARS-F (Liu et al. 2000 Phys. Plasmas 7 3681) is utilized to model = 3 resistive wall mode (RWM) control for Chinese Fusion Engineering Test Reactor (CFETR) under a 13 
plasma current, comparing simulation results with those of = 1 RWM. = 3 RWM requires higher critical feedback gain for suppression, whereas = 1 RWM requires higher on-axis Alfvén speed to be suppressed. A synergistic approach combining plasma flow with feedback control is explored. It can be seen that plasma flow can enhance merging of closed-loop roots for = 3 RWM, resulting in mode growth rate robust to variations in feedback gains. Employing a proportional-derivative (PD) controller further reduces growth rate of = 3 RWM. Results of synergetic control have shown that = 3 RWM can be unstable when = 1 RWM is suppressed in this CFETR scenario. Additionally, MARS-F initial value code is also utilized to investigate time evolution during feedback control for = 3 RWM, which includes power saturation. By introducing PD controller, both maximum coil current needed to suppress = 3 RWM and signal oscillation in sensor coil for = 3 RWM are effectively reduced.
The original online version of this article was revised: In this article the author’s name Jiajie Zhu was incorrectly written as Jaimie Zhu.
A correction to this article is available online at https://doi.org/10.1140/epjs/s11734-025-01749-y.
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© The Author(s), under exclusive licence to EDP Sciences, Springer-Verlag GmbH Germany, part of Springer Nature 2025
corrected publication 2025
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
