Gyrokinetic simulation of the interplay between ion temperature gradient turbulence and reversed shear Alfvén Eigenmodes

被引：0

作者：

Yang, Yuheng ^{[1
,2
]}

Ye, Lei ^{[1
]}

Chen, Yang ^{[3
]}

Xiang, Nong ^{[1
]}

Sun, Youwen ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Plasma Phys, Hefei Inst Phys Sci, Hefei 230031, Peoples R China

[2] Univ Sci & Technol China, Hefei 230031, Peoples R China

[3] Univ Colorado, Boulder, CO 80309 USA

来源：

NUCLEAR FUSION | 2025年 / 65卷 / 01期

关键词：

gyrokinetic simulation; energetic particles; tokamak; turbulent transport; INSTABILITIES; PARTICLES; WAVES;

D O I：

10.1088/1741-4326/ad928b

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 gyrokinetic simulation, which incorporates both the reversed shear Alfv & eacute;n eigenmode (RSAE) and the ion temperature gradient (ITG) turbulence, has been performed using the electromagnetic gyrokinetic Particle-In-Cell (PIC) code GEM. Strong nonlinear wave coupling and energy transfer between RSAE and ITG turbulence have been observed. Specific analyses show that the n = 4 Alfv & eacute;n eigenmode primarily interacts with the ITG harmonics with long wavelength (n <= 16). It is found that a background ITG turbulence can suppress the saturation level of RSAE and change the energetic particle transport. The frequency up-shift of RSAE and the frequency modulation on ITG components by RSAE are also observed. The impacts of the initial condition on the RSAE-ITG turbulence simulation are also discussed.

引用

页数：14

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