Effect of toroidal mode coupling on explosive dynamics of m/n=3/1 double tearing mode  

作　　者：Xingqiang LU Ge GAO Zhiwei MA Wei GUO Xin LI 路兴强;高歌;马志为;郭玮;李鑫(College of Nuclear Equipment and Nuclear Engineering,Yantai University,Yantai 264005,People’s Republic of China;Institute for Fusion Theory and Simulation,Department of Physics,Zhejiang University,Hangzhou 310027,People’s Republic of China)

机构地区：[1]College of Nuclear Equipment and Nuclear Engineering,Yantai University,Yantai 264005,People’s Republic of China [2]Institute for Fusion Theory and Simulation,Department of Physics,Zhejiang University,Hangzhou 310027,People’s Republic of China

出　　处：《Plasma Science and Technology》2024年第10期8-16,共9页等离子体科学和技术（英文版）

基　　金：supported by the National MCF Energy R&D Program of China(Nos.2022YFE03100000 and 2019YFE03030004);National Natural Science Foundation of China(No.11835010);the Natural Science Foundation of Shandong Province(No.ZR2021MA074);the National College Students’Innovation and Entrepreneurship Training Program(No.202211066017)。

摘　　要：The CLT code was used to quantitatively study the impact of toroidal mode coupling on the explosive dynamics of the m/n=3/1 double tearing mode.The focus of this study was on explosive reconnection processes,in which the energy bursts and the main mode no longer dominates when the separation between two rational surfaces is relatively large in the medium range.The development of higher m and n modes is facilitated by a relatively large separation between two rational surfaces,a small q_(min)(the minimum value of the safety factor),or low resistivity.The relationships between the higher m and n mode development,explosive reconnection rate,and position exchange of 3/1 islands are summarized for the first time.Separation plays a more important role than q_(min)in enhancing the development of higher m and n modes.At a relatively large separation,the good development of higher m and n modes greatly reduces the reconnection rate and suppresses the development of the main mode,resulting in the main mode not being able to develop sufficiently large to generate the position changes of 3/1 islands.

关 键 词：toroidal mode coupling higher m and n modes explosive growth reconnection rate position change 

分 类 号：O38[理学—流体力学]