Effect of kinetic ions on the toroidal double-tearing modes  

作　　者：张睿博 叶磊 Yang Chen 项农 杨小庆 Ruibo Zhang;Lei Ye;Yang Chen;Nong Xiang;Xiaoqing Yang(Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China;University of Science and Technology of China,Hefei 230026,China;Center for Integrated Plasma Studies,Universty of Colorado at Boulder,Boulder,Colorado 80309,USA)

机构地区：[1]Hefei Institutes of Physical Science,Chinese Academy of Sciences,Hefei 230031,China [2]University of Science and Technology of China,Hefei 230026,China [3]Center for Integrated Plasma Studies,University of Colorado at Boulder,Boulder,Colorado 80309,USA

出　　处：《Chinese Physics B》2023年第2期366-371,共6页中国物理B（英文版）

基　　金：supported by the National MCF Energy R&D Program of China (Grant No. 2019YFE03060001);the National Key R&D Program of China (Grant No. 2017YFE0300406);the National Natural Science Foundation of China (Grant Nos. 11975272 and 11905257);supported by the SciDAC Center Advanced Tokamak Modeling Environment (AToM) (Grant No. DE-SC0017992)。

摘　　要：We investigate the effects of kinetic ions on double-tearing modes(DTMs) using the gyrokinetic particle-in-cell simulation code GEM with a gyrokinetic ion/fluid electron hybrid model. It is found that the ion kinetic effects can decrease the growth rate of the DTMs. This effect is more significant for stronger coupling of DTMs with smaller distance between the rational surfaces. Kinetic ions can also enhance the coupling effect between the two rational surfaces. Energy transfer analyses between particles and wave fields show that the stabilizing effect of kinetic ions comes mainly from the perpendicular magnetic drift of ions in the coupling region and around the outer rational surface.

关 键 词：double-tearing modes kinetic ions coupling effect 

分 类 号：O572.2[理学—粒子物理与原子核物理]