Generation of Alfven wave energy during magnetic reconnection in Hall MHD
Generation of Alfven wave energy during magnetic reconnection in Hall MHD
复制标题
霍尔 MHD 磁重联过程中阿尔芬波能量的产生
DOI：
10.1088/2058-6272/aa7c17
复制
发表时间：
2017
影响因子：
1.7
通讯作者：
Ma ZW
中科院分区：
文献类型：
--
作者：
Li Lingjie;Ma Zhiwei;Wang Licheng;Ma ZW
利用霍尔磁流体动力学(MHD)系统地研究了重联率对Alfvén波能量产生的影响。众所周知，磁能的降低与重联率成正比。结果表明，在单位Alfvén时间内，Alfvén波能量的瞬时增加与重联率成平方关系。由于霍尔磁流体重联率的大幅度提高，转换后的Alfvén波的能量得到了极大的增强。对于日地等离子体，在磁场重联过程中，有霍尔效应时单位时间内的最大转换Alfvén波能量可以比没有霍尔效应时高50倍以上。
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.