Temperature Gradient, Toroidal and Ion FLR Effects on Drift-Tearing Modes

• 作者: Chao Dong Ding Li Hao Shi Jian Bao Jintao Cao Wenlu Zhang Zhihong Lin
• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2020,（8）
• 所属期刊栏目: PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES
• 页码范围: 57-62
• 页数: 6页
• 语种: 英文
• DOI: 10.1088/0256-307X/37/8/085201

摘要

The influences of the temperature gradient and toroidal effects on drift-tearing modes have been studied using the Gyrokinetic Toroidal code.After the thermal force term is introduced into the parallel electron force balance equation,the equilibrium temperature gradient can cause a significant increase in the growth rate of the drift tearing mode and a broadening of the mode structure.The simulation results show that the toroidal effects increase the growth rate of the drift-tearing mode,and the contours of the perturbation field "squeeze" toward the stronger field side in the poloidal section.Finally,the hybrid model for fluid electrons and kinetic ions has been studied briefly,and the dispersion relation of the drift-tearing mode under the influence of ion finite Larmor radius effects is obtained.Compared with the dispersion relation under the fluid model,a stabilizing effect of the ion finite Larmor radius is observed.