Nonlinear saturation of reversed shear Alfvén eigenmode via high-frequency quasi-mode generation

被引：0
作者：
Cheng, Zhiwen [1 ]
Wei, Guangyu [1 ]
Ye, Lei [2 ,3 ]
Qiu, Zhiyong [2 ,3 ,4 ]
机构：
[1] Zhejiang Univ, Inst Fus Theory & Simulat, Sch Phys, Hangzhou 310027, Peoples R China
[2] Chinese Acad Sci, CAS Key Lab Frontier Phys Controlled Nucl Fus, Hefei 230031, Peoples R China
[3] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
[4] ENEA CR Frascati, Ctr Nonlinear Plasma Sci, I-00044 Frascati, Italy
来源：
PLASMA SCIENCE & TECHNOLOGY | 2025年 / 27卷 / 01期
基金：
中国国家自然科学基金;
关键词：
reversed shear Alfv & eacute; n eigenmode; nonlinear mode coupling; continuum damping; gyrokinetic theory; TOROIDAL ALFVEN EIGENMODES; KINETIC-THEORY; WAVES; EXCITATION; SIMULATION; PARTICLES; STABILITY; DYNAMICS; DRIVEN; ENERGY;
D O I：
10.1088/2058-6272/ad8814
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：
A nonlinear saturation mechanism for reversed shear Alfv & eacute;n eigenmode (RSAE) is proposed and analyzed, and is shown to be of relevance to typical reactor parameter region. The saturation is achieved through the generation of high-frequency quasi-mode due to nonlinear coupling of two RSAEs, which is then damped due to coupling with the shear Alfv & eacute;n continuum, and leads to the nonlinear saturation of the primary RSAEs. An estimation of the nonlinear damping rate is also provided.
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页数：6
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