Gyrokinetic simulations of double tearing modes in toroidal plasma

Yao，Y.1; Lin，Zhihong2; Dong，J. Q.3; Shi，P.3; Liu，S. F.1; Li，Jingchun4

2021-11-29

10.1016/j.physleta.2021.127681

PHYSICS LETTERS A   影响因子和分区

0375-9601

An investigation of the characteristics of double-tearing modes (DTMs) and the influence of the kinetic effects of ions has been carried out with the gyrokinetic code GTC. A simplified linear fluid and a gyro-kinetic model has been used for the electron and ion dynamics, respectively. It was found that as the separation of the rational surfaces was increased, the growth rates of DTMs were enhanced and the DTM system tended to decouple into a system of two single-tearing modes. When the width between the rational surfaces is larger, the corresponding amplitude of the inner-tearing mode is smaller. We also demonstrate that the existence of thermal ions destabilizes the DTM. The toroidal effect also has a mild destabilizing effect (∼8%) on the growth of DTMs, which is consistent with the theoretical analysis.

Double tearing mode Gyrokinetics Magnetic island Numerical modeling

SCI ; EI

英语

通讯

WOS:000701251300006

20213810929595

Ions ; Plasma simulation

Plasma Physics:932.3

PHYSICS

2-s2.0-85115241329

Scopus

1.School of Physics,Nankai University,Tianjin,300071,China
2.University of California,Irvine,92697,United States
3.Southwestern Institute of Physics,Chengdu,610041,China
4.Department of Earth and Space Sciences,Southern University of Science and Technology,Shenzhen,518000,China

Yao，Y.,Lin，Zhihong,Dong，J. Q.,et al. Gyrokinetic simulations of double tearing modes in toroidal plasma[J]. PHYSICS LETTERS A,2021,417.

Yao，Y.,Lin，Zhihong,Dong，J. Q.,Shi，P.,Liu，S. F.,&Li，Jingchun.(2021).Gyrokinetic simulations of double tearing modes in toroidal plasma.PHYSICS LETTERS A,417.

Yao，Y.,et al."Gyrokinetic simulations of double tearing modes in toroidal plasma".PHYSICS LETTERS A 417(2021).