numerical simulation study on the mechanism of electron acceleration in magnetic reconnection
磁场重联中的电子加速机制的数值模拟研究

Based on the study of Petschek magnetic reconnection by using 2.5D hybrid simulation, the acceleration characteristics of the test electrons are inspected. The results show that a few test electrons, accelerated by the low frequency steady reconnection field, can obtain extraordinarily high energy. The energy spectrum of energetic electrons abides the power law, though no remarkable difference can be found in the velocity distribution function of electrons as a whole. The electrons are confined into an area with weak magnetic field where they are accelerated. They are accelerated directly by the E y component of electric field induced by the magnetic reconnection. Two situations of electron accelerations can be classified by the period and location. In one situation the electrons is located initially in the acceleration area, in the other elections drift into the area from somewhere else. They are both speeded up in the acceleration region.