Overview of the Recent Study on ELM Mitigation Physics with Different External Actuators on HL-2A Tokamak

Xiao, Guoliang; Zhang, Y. P.; Zou, X.L.; Liang, Anshu; Feng, B.B.; Bai, Xue; Zhang, K.; Mazon, D.; Chen, C. Y.; Chen, W.; Cheng, J.; Delpech, L.; Ding, X.T.; Dong, Chengli; Dong, J. Q.; Cui, Z.Y.; Gao, Jinming; Giruzzi, G.; Goniche, M.; Han, Mingkun; He, Xiaoxue; Hoang, T.; Huang, Zhuo; Isobe, M.; Ji, Xiao; Li, Y. G.; Liu, A. D.; Liu, C. H.; Liu, Li; Lü, B.; Peysson, Y.; Shi, Peng; Song, X.M.; Sun, Peng; Wang, T. B.; Wang, Z. H.; Wang, Z. X.; Wen, Jie; Xiao, W.W.; Yan, L.; Yang, Zongyu; Yu, D.L.; Yuan, Guoliang; Zhang, P. F.; Zhou, Yixuan; Shi, Z.B.; Liu, Y.; Yang, Qingwei; Xu, M.; Duan, X.R.

doi:10.1007/s10894-021-00281-w

Cited by 2 publications

(2 citation statements)

References 65 publications

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“…Issues relating to amplitudes, repetition rates and mode spectra of ELMs remain to be elucidated, at least partly due to numerical limitations of codes operating with realistic conditions. Recent works [10][11][12][13][14][15][16] have tackled the challenge of explaining the mechanism of resonant magnetic perturbation (RMP) control (by mitigation/suppression) of type-I ELMs observed in several experiments [17][18][19][20][21]. The simulations presented in this article were carried out using the Culham Transporter of Ions and Electrons (CUTIE) [8,12,[22][23][24][25] -a two-fluid electromagnetic nonlinear global code.…”

Section: Introductionmentioning

confidence: 99%

Bifurcation behaviour of resonant magnetic perturbation control of edge localized modes in tokamaks: nonlinear simulation results

Thyagaraja

Sen

Chandra

2023

Phil. Trans. R. Soc. A.

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In this article, some novel results of two fluid nonlinear simulations on the control of edge localized modes (ELMs) in tokamaks by resonant magnetic perturbations (RMPs) are presented. Many experiments around the world have demonstrated that RMPs are effective in possibly mitigating or even completely suppressing strong (type I) ELMs that would seriously degrade confinement and could cause other heat-flux problems in both present (e.g. JET) and planned future tokamaks (ITER). Our simulations demonstrate that non-axisymmetric RMPs with toroidal mode numbers n = 2 , 3 , 4 and suitable field-strengths (kAturns) at the plasma wall imply significant bifurcations in their ability to mitigate or even suppress type-I ELMs, qualitatively similar to RMP effects on ELMs reported in experiments. This article is part of a discussion meeting issue ‘H-mode transition and pedestal studies in fusion plasmas’.

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Section: Introductionmentioning

confidence: 99%

Bifurcation behaviour of resonant magnetic perturbation control of edge localized modes in tokamaks: nonlinear simulation results

Thyagaraja

Sen

Chandra

2023

Phil. Trans. R. Soc. A.

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“…ELM control and mitigation are therefore a major concern for safe tokamak operation. A large number of experimental as well as theoretical investigations have recently been devoted to this topic [1][2][3][4][5][6][7][8][9][10] and have explored the dynamics of ELMs as a function of various plasma parameters such as the q 95 , the pedestal profile, the edge density, the edge collisionality etc. These studies have considerably advanced our understanding of the onset and evolution of ELMs in various tokamaks.…”

Section: Introductionmentioning

confidence: 99%

A nonlinear simulation study of the effect of toroidal rotation on RMP control of ELMs

2021

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We present numerical simulation studies on the combined influence of a resonant magnetic perturbation (RMP) and a sheared toroidal flow on the characteristics of edge localized modes (ELMs). We find that the presence of a sheared flow enhances the stabilising effect of the RMP in a synergistic manner. For a fixed RMP power a comparative study is made of the nature of ELM dynamics for different flow configurations. A counter-current off-axis flow is found to be the most effective in mitigating ELMs by changing their nature from a spiky type-I kind of ELMS to a grassy variety. There is also a concomitant improvement in the over all plasma beta and energy confinement time.

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Overview of the Recent Study on ELM Mitigation Physics with Different External Actuators on HL-2A Tokamak

Cited by 2 publications

References 65 publications

Bifurcation behaviour of resonant magnetic perturbation control of edge localized modes in tokamaks: nonlinear simulation results

Bifurcation behaviour of resonant magnetic perturbation control of edge localized modes in tokamaks: nonlinear simulation results

A nonlinear simulation study of the effect of toroidal rotation on RMP control of ELMs

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