Experimental observation of the transport induced by ion Bernstein waves near the separatrix of magnetic nulls  

作　　者：Renchuan HE Xiaoyi YANG Chijie XIAO Xiaogang WANG Tianchao XU Zhibin GUO Yue GE Xiuming YU Zuyu ZHANG Rui KE Ruixin YUAN 何任川;杨肖易;肖池阶;王晓钢;徐田超;郭志彬;盖跃;余修铭;张祖煜;柯锐;袁瑞鑫(State Key Laboratory of Nuclear Physics and Technology,School of Physics,Peking University,Beijing 100871,People’s Republic of China;Department of Physics,Harbin Institute of Technology,Harbin 150001,People’s Republic of China;Center for Fusion Science of Southwestern Institute of Physics,Chengdu 610041,People’s Republic of China)

机构地区：[1]State Key Laboratory of Nuclear Physics and Technology,School of Physics,Peking University,Beijing 100871,People’s Republic of China [2]Department of Physics,Harbin Institute of Technology,Harbin 150001,People’s Republic of China [3]Center for Fusion Science of Southwestern Institute of Physics,Chengdu 610041,People’s Republic of China

出　　处：《Plasma Science and Technology》2022年第11期63-69,共7页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China(No.11975038);the National MCF Energy R&D Program of China(Nos.2017YFE0300601 and 2018YFE0311400).

摘　　要：The waves in a magnetic null could play important roles during 3D magnetic reconnection.Some preliminary clues in this paper show that the ion Bernstein wave(IBW)may be closely related to transport process in magnetic null region.The magnetic null configuration experiment reported here is set up in a linear helicon plasma device,Peking University plasma test device(PPT).The wave modes with frequencies between the first and third harmonics of local ion cyclotron frequency(w_(ci))are observed in the separatrix of magnetic null,which are identified as the IBW based on the dispersion relation.Further analysis shows that IBW could drive substantial particle flux across the magnetic separatrix.The theoretical radial particle flux driven by IBW and the measured parallel flow in PPT device are almost on the same order,which shows that IBW may play an important role during 3D reconnection process.

关 键 词：SEPARATRIX ion Bernstein wave particle transport magnetic null magnetic reconnection 

分 类 号：O53[理学—等离子体物理]