Shear Alfvén waves within magnetic islands

被引：0

作者：

Koenies, Axel ^{[1
]}

Cao, Jinjia ^{[2
]}

Kleiber, Ralf ^{[1
]}

机构：

[1] Max Planck Inst Plasma Phys, Wendelsteinstr 1, D-17489 Greifswald, Germany

[2] Univ South China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China

来源：

NUCLEAR FUSION | 2024年 / 64卷 / 05期

关键词：

magnetohydrodynamics; magnetic confinement fusion; plasma stability;

D O I：

10.1088/1741-4326/ad34e2

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：

We calculate Alfven eigenmodes within a magnetic island (MiAE) which have been conjectured over a decade ago. Starting from a cylindrical plasma equilibrium, we calculate the complete metric of the island interior assuming an iota profile with a constant shear for Wendelstein 7-X parameters. Then, we solve the resulting Magneto-Hydrodynamic equations inside the island optionally considering Finite Larmor Radius corrections. We find various eigenmodes in the lowest gaps for n = 0. The eigenmode with the lowest frequency shows a weakly non-linear dependence on the island width which deviates considerably from an earlier estimate.

引用

页数：6

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