BOUT++ simulation study of turbulence transport during n=4 resonant magnetic perturbation induced edge localized mode suppression phase in EAST

doi:10.1088/1674-1056/ae04d8

中国物理B ›› 2026, Vol. 35 ›› Issue (4): 45201-045201.doi: 10.1088/1674-1056/ae04d8

BOUT++ simulation study of turbulence transport during n=4 resonant magnetic perturbation induced edge localized mode suppression phase in EAST

Ziming Zhen(甄子明)¹, Taihao Huang(黄泰豪)¹, Yuchen Xu(徐宇晨)¹, Hui Sheng(盛回)², Tianyuan Liu(刘天元)¹, Xueruoqi Liang(梁雪若棋)¹, Manni Jia(贾曼妮)², Xuemin Wu(吴学民)^1,2, Shifeng Mao(毛世峰)^1,†, Yanlong Li(李彦龙)², Tianyang Xia(夏天阳)², Youwen Sun(孙有文)², and Minyou Ye(叶民友)^1,‡

1 School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230026, China;
2 Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China

收稿日期:2025-04-27 修回日期:2025-08-12 接受日期:2025-09-09 发布日期:2026-04-13
通讯作者: Shifeng Mao, Minyou Ye E-mail:sfmao@ustc.edu.cn;yemy@ustc.edu.cn
基金资助:
Project supported by the National MCF Energy Research and Development Program of China (Grant Nos. 2024YFE03010003, 2019YFE03080500, and 2019YFE03030004). The results are obtained with the help of the EIRENE package (see www.eirene.de) including the related code, data, and tools.[49] Numerical simulations are carried out using the CFETR Integration Design Platform (CIDP)[50,51] with the support of the Supercomputing Center of University of Science and Technology of China.

BOUT++ simulation study of turbulence transport during n=4 resonant magnetic perturbation induced edge localized mode suppression phase in EAST

1 School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230026, China;
2 Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China

Received:2025-04-27 Revised:2025-08-12 Accepted:2025-09-09 Published:2026-04-13
Contact: Shifeng Mao, Minyou Ye E-mail:sfmao@ustc.edu.cn;yemy@ustc.edu.cn
Supported by:
Project supported by the National MCF Energy Research and Development Program of China (Grant Nos. 2024YFE03010003, 2019YFE03080500, and 2019YFE03030004). The results are obtained with the help of the EIRENE package (see www.eirene.de) including the related code, data, and tools.[49] Numerical simulations are carried out using the CFETR Integration Design Platform (CIDP)[50,51] with the support of the Supercomputing Center of University of Science and Technology of China.

摘要/Abstract

摘要： The effect of the resonant magnetic perturbation (RMP) on the turbulence transport during the edge localized mode (ELM) suppression phase is investigated by the BOUT$++$ six-field two-fluid simulations. Based on the edge plasma profiles during the ELM suppression phase in EAST experiment with $n =4$ RMP ($n$ is the toroidal mode number), the plasma response field is calculated using CLTx and introduced in the BOUT$++$ simulation. Compared with the case without RMP, the simulated flux-surface averaged radial particle flux at the position of peak pressure gradient increases to $\sim 1.5$ times for the case with RMP, which is close to the estimated particle flux according to the experimental plasma profiles. It implies that the turbulence transport could have a dominating contribution to the radial transport for maintaining the pedestal density profile during ELM suppression phase after density pump-out, especially when the stochasticity of the magnetic field is not significant in the pedestal region. The increase in the radial particle flux for the case with RMP is due to the significant increase in electric drift flux, which is partly offset by the magnetic flutter flux. The enhancement of the turbulent electric drift flux is mainly due to the enhanced density and electric potential perturbations. The change in the phase difference between them further enhances the contributions of the medium-$n$ modes and suppresses the contribution of the low-$n$ modes. Further complexity-entropy analysis indicates that the turbulence is more stochastic, which could be related to the enhanced mode-mode coupling due to RMP effect.

关键词: pedestal, resonant magnetic perturbation, density pump-out, turbulent transport, BOUT$++$

Abstract: The effect of the resonant magnetic perturbation (RMP) on the turbulence transport during the edge localized mode (ELM) suppression phase is investigated by the BOUT$++$ six-field two-fluid simulations. Based on the edge plasma profiles during the ELM suppression phase in EAST experiment with $n =4$ RMP ($n$ is the toroidal mode number), the plasma response field is calculated using CLTx and introduced in the BOUT$++$ simulation. Compared with the case without RMP, the simulated flux-surface averaged radial particle flux at the position of peak pressure gradient increases to $\sim 1.5$ times for the case with RMP, which is close to the estimated particle flux according to the experimental plasma profiles. It implies that the turbulence transport could have a dominating contribution to the radial transport for maintaining the pedestal density profile during ELM suppression phase after density pump-out, especially when the stochasticity of the magnetic field is not significant in the pedestal region. The increase in the radial particle flux for the case with RMP is due to the significant increase in electric drift flux, which is partly offset by the magnetic flutter flux. The enhancement of the turbulent electric drift flux is mainly due to the enhanced density and electric potential perturbations. The change in the phase difference between them further enhances the contributions of the medium-$n$ modes and suppresses the contribution of the low-$n$ modes. Further complexity-entropy analysis indicates that the turbulence is more stochastic, which could be related to the enhanced mode-mode coupling due to RMP effect.

Key words: pedestal, resonant magnetic perturbation, density pump-out, turbulent transport, BOUT$++$

中图分类号: (Plasma turbulence)

52.35.Ra

52.25.Gj (Fluctuation and chaos phenomena) 52.30.-q (Plasma dynamics and flow)

Ziming Zhen(甄子明), Taihao Huang(黄泰豪), Yuchen Xu(徐宇晨), Hui Sheng(盛回), Tianyuan Liu(刘天元), Xueruoqi Liang(梁雪若棋), Manni Jia(贾曼妮), Xuemin Wu(吴学民), Shifeng Mao(毛世峰), Yanlong Li(李彦龙), Tianyang Xia(夏天阳), Youwen Sun(孙有文), and Minyou Ye(叶民友). BOUT++ simulation study of turbulence transport during n=4 resonant magnetic perturbation induced edge localized mode suppression phase in EAST[J]. 中国物理B, 2026, 35(4): 45201-045201.

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BOUT++ simulation study of turbulence transport during n=4 resonant magnetic perturbation induced edge localized mode suppression phase in EAST

BOUT++ simulation study of turbulence transport during n=4 resonant magnetic perturbation induced edge localized mode suppression phase in EAST

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