磁场重联是空间等离子体和实验室等离子体中的常见现象,被认为是太阳耀斑和磁层亚暴的重要机制。实验室磁场重联的模拟研究已经有二十余年的历史,并且取得了一系列重要的结果。对几个主要的磁场重联实验装置进行了介绍,给出了各个装置的等离子体参数以及产生重联的方法,回顾了实验室研究中和太阳射电密切相关的几个问题。另外,以中国科技大学的线性磁化等离子体装置为基础,建立了国内首个磁场重联的实验装置,研制了实验中需要的诊断工具,并开展了初步的磁场重联实验。
Magnetic reconnection is an important phenomenon in space and laboratory plasmas, it is considered to be an important mechanism of solar flare and magnetospheric substorm.In the past years,a series of important results have been obtained in the experimental research of magnetic reconnection in laboratory plasma.In this paper,several major experimental devices of magnetic reconnection are introduced,with their different plamsa parameters,experimental methods and essential findings.In TS-3 and MRX device,ion acceleration and heating related with magnetic reconnection were observed,but the particle acceleration mechanism is unclarified. Detailed experimental study of electromagnetic fluctuation has been made in MRX,and a positive correlation between magnetic fluctuations up to the lower-hybrid frequency range and fast reconnection was found.Ion sound turbulence in the current sheet was measured in LCD,which produced an anomalous collision rate and enhanced reconnection rate.In LCD device,microwave radiation was found,which may cause by mode conversion of plasma waves on density gradients. In addition,reconnection experiment is carrying out on the linear magnetized plasma device (LMP) in USTC.Langmuir probes,magnetic probes,energy gridding analyzer,mach probes and emissive probes are fabricated and installed in LMP device.The reconnection magnetic field is generated by two parallel copper boards with current in the same direction.