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利用三维试验粒子轨道计算法, 以强的行星际磁场南向分量驱动的对流电场作为磁暴的主要起因, 研究了大磁暴期间环电流离子的注入过程和对称环电流的形成机制. 本文主要关心大磁暴环电流中的氧离子成分. 计算结果揭示了磁暴环电流形成过程中部分注入粒子轨道具有混沌特征. 特别是证明了粒子由磁尾向内磁层的注入过程中产生的屏蔽电场可使开放轨道转变成闭合轨道, 因而是闭合环电流形成的重要机制. 进一步证明了注入粒子可以得到有效的加速, 加速时间约为1~3小时.
Using the three-dimensional experimental particle orbit calculation method, the convection electric field driven by strong southward component of the interplanetary magnetic field is the main cause of magnetic storms, and the injection process of ring current ions and the formation mechanism of symmetrical ring current are studied. The results show that some of the implanted particles have chaotic characteristics during the formation of magnetic storm ring current.It is especially proved that the shielding electric field generated by the injection of particles into the magnetic layer can make the open The orbital changes into a closed orbit, which is an important mechanism for the formation of a closed-loop current, which further proves that the implanted particles can be effectively accelerated with an acceleration time of about 1 to 3 hours.