ηi-mode in toroidal plasmas with anisotropic ion temperature and its gradient

被引：5
|
作者：
Jia, M. X. [1 ]
Li, J. C. [1 ]
Liu, S. F. [1 ]
Kong, W. [2 ]
Zhu, K. E. [1 ]
Dong, J. Q. [3 ]
机构：
[1] Nankai Univ, Sch Phys, Tianjin 300071, Peoples R China
[2] Civil Aviat Univ China, Coll Sci, Tianjin 300300, Peoples R China
[3] Southwestern Inst Phys, Chengdu 610041, Peoples R China
来源：
NUCLEAR FUSION | 2021年 / 61卷 / 04期
基金：
国家重点研发计划;
关键词：
gyro-kinetic equation; ITG mode; ion temperature and temperature gradient anisotropy; MODES; INSTABILITY;
D O I：
10.1088/1741-4326/abe6b5
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：
The gyrokinetic integral eigenmode equation is applied to study ion-temperature-gradient (ITG) mode in toroidal plasmas with magnetic shear, where the ion temperature and its gradient are anisotropic. The numerical studies demonstrate that instability of ITG mode is reduced by an ion temperature anisotropy of higher perpendicular temperature T-i perpendicular to or high enough parallel temperature T-i parallel to, in which Landau damping plays an important role. The temperature gradient in the perpendicular (parallel) direction is stronger to drive ITG mode for large T-i perpendicular to (T-i parallel to). These effects are directly related to the temperature gradient threshold for excitation of ITG mode. In addition, the synergy effect of magnetic shear and anisotropy of ion temperature and its gradient is studied in detail, where the combination of magnetic shear and large parallel temperature has the most obvious inhibitory effect on ITG mode.
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页数：7
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