Nonlinear frequency chirping and radial restructure of the ion-temperature-gradient-driven turbulence

被引：2
|
作者：
Sun, Shiqiao [1 ]
Wang, Zihao [1 ]
Wang, Shaojie [1 ]
Dai, Zongliang [1 ]
机构：
[1] Univ Sci & Technol China, Sch Phys Sci, Hefei 230026, Peoples R China
来源：
NUCLEAR FUSION | 2022年 / 62卷 / 12期
基金：
中国国家自然科学基金;
关键词：
nonlinear resonance; zonal shearing effect; nonlinear mode structure; frequency chirping; DRIFT WAVES; TRANSPORT; FLOW; SUPPRESSION; STABILITY;
D O I：
10.1088/1741-4326/ac91e0
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：
Global nonlinear gyrokinetic simulation of the ion-temperature-gradient (ITG) modes clearly demonstrates the nonlinear phase-space resonance, which can be well understood by the nonlinear frequency chirping due to the nonlinear poloidal acceleration of resonant particles by the large-scale structure of radial electric field rather than the widely discussed local shearing effects of the zonal flows. The nonlinear radial restructure of a single-n ITG mode generates multiple daughter-ballooning-modes.
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页数：7
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