Multi-scale interaction between tearing modes and micro-turbulence in the HL-2A plasmas  

作　　者：Min JIANG Yuhong XU Zhongbing SHI Wulyu ZHONG Wei CHEN Rui KE Jiquan LI Xuantong DING Jun CHENG Xiaoquan JI Zengchen YANG Peiwan SHI Jie WEN Kairui FANG Na WU Xiaoxue HE Anshu LIANG Yi LIU Qingwei YANG Min XU HL-2A Team 蒋敏;许宇鸿;石中兵;钟武律;陈伟;柯锐;李继全;丁玄同;程钧;季小全;杨曾辰;施培万;闻杰;方凯锐;吴娜;何小雪;梁桉树;刘仪;杨青巍;许敏;HL-2A Team(Southwestern Institute of Physics,Chengdu 610041,People's Republic of China;Institute of Fusion Science,School of Physical Science and Technology,Southwest Jiaotong University,Chengdu 610031,People's Republic of China;School of Physics,Dalian University of Technology,Dalian 116024,People's Republic of China)

机构地区：[1]Southwestern Institute of Physics,Chengdu 610041,People's Republic of China [2]Institute of Fusion Science,School of Physical Science and Technology,Southwest Jiaotong University,Chengdu 610031,People's Republic of China [3]School of Physics,Dalian University of Technology,Dalian 116024,People's Republic of China

出　　处：《Plasma Science and Technology》2020年第8期1-7,共7页等离子体科学和技术（英文版）

基　　金：the National Key R&D Program of China(Nos.2017YFE0301201 and 2017YFE0301106);National Natural Science Foundation of China(Nos.11705051,11820101004,11875021 and 11775069);the Young Elite Scientists Sponsorship Program by CAST(No.2018QNRC001).

摘　　要：The influence of m/n=2/1(m and n are poloidal and toroidal mode numbers)tearing modes on plasma perpendicular flows and micro-fluctuations has been investigated in HL-2A neutral beam injection heated L-mode plasmas.It is found that the local perpendicular rotation velocity and turbulence energy are modulated by the alternation between the island X-point and O-point of the naturally rotating tearing modes.Cross-correlation analysis indicates that the modulation of density fluctuations by the tearing mode is not only limited to the island region,but also occurs in the edge region near the last closed flux surface.The turbulence exhibits distinct spectral characteristics inside and outside the island region.In addition,it is observed that the particle flux near the strike point is also significantly impacted by the tearing modes.The experimental evidence reveals that there are strong core-edge interactions between the core tearing modes and the edge transport.

关 键 词：tearing modes TURBULENCE particle flux MODULATION core-edge interaction 

分 类 号：TL612[核科学技术—核技术及应用]