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

共 50 条

[41] SHEAR-FLOW INSTABILITIES OF A ROTATING MERCURY IN PRESENCE OF A MAGNETIC-FIELD [J].

AMAGISHI, Y ;

YOSHIKAWA, Y ;

OHARA, J .

JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN, 1991, 60 (08) :2496-2499

[42] Stability of the experimental and numerical spheromaks with shear toroidal flow induced by magnetic reconnection [J].

Ahmadi, T. ;

Cai, Y. ;

Ono, Y. ;

Tanabe, H. .

PLASMA PHYSICS AND CONTROLLED FUSION, 2025, 67 (02)

[43] Analysis and control of shear flow over a rotating plate in the presence of magnetic field [J].

Reza, Motaliar ;

Sekhar, G. P. Raja .

ZAMM-ZEITSCHRIFT FUR ANGEWANDTE MATHEMATIK UND MECHANIK, 2020, 100 (04)

[44] Note on the suppression of transient shear-flow instability by a spanwise magnetic field [J].

H. K. Moffatt .

Journal of Engineering Mathematics, 2010, 68 :263-268

[45] Note on the suppression of transient shear-flow instability by a spanwise magnetic field [J].

Moffatt, H. K. .

JOURNAL OF ENGINEERING MATHEMATICS, 2010, 68 (3-4) :263-268

[46] MHD Equilibrium with Reversed Current Density and Magnetic Islands Revisited: the Vacuum Vector Potential Calculus [J].

Braga, F. L. .

PLASMA SCIENCE & TECHNOLOGY, 2013, 15 (10) :985-988

[47] MHD Equilibrium with Reversed Current Density and Magnetic Islands Revisited:the Vacuum Vector Potential Calculus [J].

FLBRAGA .

Plasma Science and Technology, 2013, (10) :985-988

[48] Reflection Properties of Gravito-MHD Waves in an Inhomogeneous Horizontal Magnetic Field [J].

Jovanovic, G. .

SOLAR PHYSICS, 2014, 289 (11) :4085-4104

[49] ON OBLIQUE MAGNETOHYDRODYNAMIC WAVES IN AN ATMOSPHERE UNDER A MAGNETIC-FIELD OF ARBITRARY DIRECTION [J].

CAMPOS, LMBC ;

SALDANHA, R .

GEOPHYSICAL AND ASTROPHYSICAL FLUID DYNAMICS, 1991, 56 (1-4) :237-266

[50] Reflection Properties of Gravito-MHD Waves in an Inhomogeneous Horizontal Magnetic Field [J].

G. Jovanović .

Solar Physics, 2014, 289 :4085-4104

← 1 2 3 4 5 →