Nonlinear dynamics of nonadiabatic chirping-frequency Alfven modes in tokamak plasmas

被引：6

作者：

Wang, X. ^{[1
]}

Briguglio, S. ^{[2
]}

Bottino, A. ^{[1
]}

Falessi, M. ^{[2
]}

Hayward-Schneider, T. ^{[1
]}

Lauber, Ph ^{[1
]}

Mishchenko, A. ^{[1
]}

Villard, L. ^{[3
]}

Zonca, F. ^{[2
,4
]}

机构：

[1] Max Planck Inst Plasma Phys, D-85748 Garching, Germany

[2] ENEA, Fus & Nucl Safety Dept, Via Enrico Fermi 45 CP 65, I-00044 Frascati, Italy

[3] Swiss Plasma Ctr SPC, Ecole Polytech Fed Lausanne EPFL, CH-1015 Lausanne, Switzerland

[4] Zhejiang Univ, Inst Fus Theory & Simulat, Sch Phys, Hangzhou, Peoples R China

来源：

PLASMA PHYSICS AND CONTROLLED FUSION | 2023年 / 65卷 / 07期

关键词：

energetic particles; gyrokinetic; Alfven mode; ENERGETIC INJECTED BEAM; DRIVEN; SATURATION; EXCITATION; EVOLUTION; WAVES; DESTABILIZATION; SIMULATION; PARTICLES; TRANSPORT;

D O I：

10.1088/1361-6587/acd71f

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Frequency chirping of Alfven modes, a phenomenon observed in tokamak fusion plasmas driven by energetic particles (EPs), can result in significant losses of EPs. In this study, we use the global gyrokinetic code ORB5 (Lanti et al 2020 Comput. Phys. Commun. 251 107072) to investigate the nonlinear dynamics of non-adiabatic frequency chirping EP modes (EPMs). Our results illuminate non-perturbative features of EPMs caused by the presence of EPs. Additionally, we find that, with a fixed safety factor profile and a single toroidal mode number, the frequency chirping rate is linearly proportional to the mode saturation amplitude, as predicted by the theory (Chen and Zonca 2016 Rev. Mod. Phys. 88 015008).

引用

页数：15

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