Observation of the poloidally asymmetrical density perturbation of sawtooth collapse on J-TEXT  

作　　者：周乙楠 庄革 石鹏 高丽 杨州军 张晓卿 the J-TEXT Team Yinan ZHOU;Ge ZHUANG;Peng SHI;Li GAO;Zhoujun YANG;Xiaoqing ZHANG;the J-TEXT Team(International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics,State Key Laboratory of Advanced Electromagnetic Engineering and Technology,School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,People’s Republic of China;Department of Engineering and Applied Physics School of Physical Sciences,University of Science and Technology of China,Hefei 230026,People’s Republic of China;United Kingdom Atomic Energy Authority,Culham Centre for Fusion Energy,Culham Science Centre,Abingdon,Oxon OX143DB,United Kingdom;Southwestern Institute of Physics,Chengdu 610041,People’s Republic of China)

机构地区：[1]International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics,State Key Laboratory of Advanced Electromagnetic Engineering and Technology,School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,People’s Republic of China [2]Department of Engineering and Applied Physics School of Physical Sciences,University of Science and Technology of China,Hefei 230026,People’s Republic of China [3]United Kingdom Atomic Energy Authority,Culham Centre for Fusion Energy,Culham Science Centre,Abingdon,Oxon OX143DB,United Kingdom [4]Southwestern Institute of Physics,Chengdu 610041,People’s Republic of China

出　　处：《Plasma Science and Technology》2023年第3期32-39,共8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 (No.2018YFE0310300);National Natural Science Foundation of China (No.51821005)。

摘　　要：The detailed density perturbations provided by the advanced polarimeter-interferometer system(Polaris) during sawtooth collapse on the Joint Texas Experimental Tokamak(J-TEXT) are reported in this article.During a sawtooth collapse and the crash of plasma pressure at the center,it is found that the increase in density in the region between the inversion radius and mixing radius is poloidally asymmetrical,while the increase in temperature is poloidally symmetrical.The poloidal location where the density increases is dependent on the phase of the precursory m/n=1/1 kink mode.It is always out of phase with the hot core of the m/n=1/1 mode.The behaviors of density perturbations during sawtooth collapse observed in J-TEXT are beyond the expectations of the standard model,and this can shed new light on the understanding of sawtooth collapse.

关 键 词：TOKAMAK sawtooth collapse POLARIMETER density perturbation 

分 类 号：TL631.24[核科学技术—核技术及应用]