Generation of Alfvén wave energy during magnetic reconnection in Hall MHD  

作　　者：Lingjie LI Zhiwei MA Licheng WANG 李灵杰;马志为;王理程(Institute for Fusion Theory and Simulation, Zhejiang University)

机构地区：Institute for Fusion Theory and Simulation, Zhejiang University, Hangzhou 310027, People＇s Republic of China

出　　处：《Plasma Science and Technology》2017年第10期5-13,共9页等离子体科学和技术（英文版）

基　　金：supported by the Fundamental Research Fund for Chinese Central Universities;National Natural Science Foundation of China under Grant No. 41474123;the ITER-CN under Grant Nos. 2013GB104004 and 2013GB111004

摘　　要：The effect of the reconnection rate on the generation of Alfvén wave energy is systematically investigated using Hall magnetohydrodynamics（MHD）. It is well known that a decrease in magnetic energy is proportional to the reconnection rate. It is found that an instantaneous increase in Alfvén wave energy in unit Alfvén time is the square dependence on the reconnection rate. The converted Alfvén wave energy is strongly enhanced due to the large increase in the reconnection rate in Hall MHD. For solar-terrestrial plasmas, the maximum converted Alfvén wave energy in unit Alfvén time with the Hall effect can be over 50 times higher than that without the Hall effect during magnetic reconnection.The effect of the reconnection rate on the generation of Alfvén wave energy is systematically investigated using Hall magnetohydrodynamics（MHD）. It is well known that a decrease in magnetic energy is proportional to the reconnection rate. It is found that an instantaneous increase in Alfvén wave energy in unit Alfvén time is the square dependence on the reconnection rate. The converted Alfvén wave energy is strongly enhanced due to the large increase in the reconnection rate in Hall MHD. For solar-terrestrial plasmas, the maximum converted Alfvén wave energy in unit Alfvén time with the Hall effect can be over 50 times higher than that without the Hall effect during magnetic reconnection.

关 键 词：magnetic reconnection Alfvén wave energy Hall effect 

分 类 号：O361.3[理学—流体力学]