Nonlinear excitation of a geodesic acoustic mode by reversed shear Alfven eignemodes

被引：2
|
作者：
Wang, Yahui [1 ,2 ]
Wang, Tao [1 ,2 ,3 ,4 ]
Wei, Shizhao [1 ,2 ]
Qiu, Zhiyong [1 ,2 ,3 ,4 ]
机构：
[1] Zhejiang Univ, Inst Fus Theory & Simulat, Hangzhou 310027, Peoples R China
[2] Zhejiang Univ, Dept Phys, Hangzhou 310027, Peoples R China
[3] Ctr Nonlinear Plasma Sci, I-6500044 Frascati, Italy
[4] ENEA CR Frascati, I-6500044 Frascati, Italy
来源：
PLASMA SCIENCE & TECHNOLOGY | 2022年 / 24卷 / 02期
基金：
国家重点研发计划; 中国国家自然科学基金;
关键词：
reversed shear Alfven eigenmode; geodesic acoustic mode; gyrokinetic theory; nonlinear mode coupling; burning plasmas; alpha channelling; WAVES;
D O I：
10.1088/2058-6272/ac42ba
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：
The parametric decay process of a reversed shear Alfven eigenmeode (RSAE) into a geodesic acoustic mode and a kinetic RSAE is investigated using nonlinear gyrokinetic theory. The excitation conditions mainly require the pump RSAE amplitude to exceed a certain threshold, which could be readily satisfied in burning plasmas operated in steady-state advanced scenario. This decay process can contribute to thermal plasma heating and confinement improvement.
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页数：5
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