地面低能电子辐照受地磁场影响的数值计算研究

The effects of geomagnetic field on ground low-energy electron irradiation

大辐照面发散型电子枪是大型磁层亚暴环境试验系统的关键部件之一。文章利用数值计算方法研究了地磁场对地面低能电子辐照的偏转效应,分析了电子束流中心偏转距离和偏转角随地磁场强度、电子枪加速电压的变化规律,最后通过试验印证了数值计算结果。研究的结果对于研制应用于大型磁层亚暴环境试验系统的大辐照面发散型电子枪具有一定的指导意义。

Dispersive electron gun with large incidence face is one of the key components in a large magnetospheric substorm environment simulation system. In this paper,the deflection effect of geomagnetism field on ground low-energy electron irradiation is studied analytically. The deflection distance and angle are shown to depend on the geomagnetism field and the accelerate voltage. The calculation results are validated by experiments,which may serve as a guidance for the development of dispersive electron gun with large incident face in magnetospheric substorm simulations.