Effect of energetic ions on edge-localized modes in tokamak plasmas

被引：2

作者：

Dominguez-Palacios, J. ^{[1
]}

Futatani, S. ^{[2
]}

Garcia-Munoz, M. ^{[1
]}

van Vuuren, A. Jansen ^{[1
,8
]}

Viezzer, E. ^{[1
]}

Gonzalez-Martin, J. ^{[1
,3
,9
]}

Toscano-Jimenez, M. ^{[1
]}

Oyola, P. ^{[1
]}

Todo, Y. ^{[4
]}

Suzuki, Y. ^{[5
]}

Sanchis, L. ^{[1
,6
,9
]}

Rueda-Rueda, J. ^{[1
]}

Galdon-Quiroga, J. ^{[1
]}

Hidalgo-Salaverri, J. ^{[1
]}

Chen, H. ^{[1
,10
]}

Rivero-Rodriguez, J. F. ^{[7
]}

Velarde, L. ^{[1
]}

机构：

[1] Univ Seville, Seville, Spain

[2] Univ Politecn Cataluna, Barcelona, Spain

[3] Univ Calif Irvine, Irvine, CA USA

[4] Natl Inst Fus Sci, Toki, Gifu, Japan

[5] Hiroshima Univ, Grad Sch Adv Sci & Engn, Higashihiroshima, Japan

[6] Aalto Univ, Espoo, Finland

[7] Culham Ctr Fus Energy, Abingdon, Oxon, England

[8] Ecole Polytech Fed Lausanne, Swiss Plasma Ctr, Lausanne, Switzerland

[9] Univ Seville, Seville, Spain

[10] SouthWestern Inst Phys, Chengdu, Peoples R China

来源：

NATURE PHYSICS | 2025年 / 21卷 / 01期

基金：

欧洲研究理事会;

关键词：

MAGNETOHYDRODYNAMIC STABILITY; FUSION PLASMAS; CONFINEMENT; PEDESTAL; REGIME; SIMULATIONS; ELMS;

D O I：

10.1038/s41567-024-02715-6

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The most efficient and promising operational regime for the International Thermonuclear Experimental Reactor tokamak is the high-confinement mode. In this regime, however, periodic relaxations of the plasma edge can occur. These edge-localized modes pose a threat to the integrity of the fusion device. Here we reveal the strong impact of energetic ions on the spatio-temporal structure of edge-localized modes in tokamaks using nonlinear hybrid kinetic-magnetohydrodynamic simulations. A resonant interaction between the fast ions at the plasma edge and the electromagnetic perturbations from the edge-localized mode leads to an energy and momentum exchange. Energetic ions modify, for example, the amplitude, frequency spectrum and crash timing of edge-localized modes. The simulations reproduce some observations that feature abrupt and large edge-localized mode crashes. The results indicate that, in the International Thermonuclear Experimental Reactor, a strong interaction between the fusion-born alpha particles and ions from neutral beam injection, a main heating and fast particle source, is expected with predicted edge-localized mode perturbations. This work advances the understanding of the physics underlying edge-localized mode crashes in the presence of energetic particles and highlights the importance of including energetic ion kinetic effects in the optimization of edge-localized mode control techniques and regimes that are free of such modes.

引用

页码：43 / 51

页数：14

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