地面低能電子輻照受地磁場影響的數(shù)值計算研究

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

摘要: 大輻照面發(fā)散型電子槍是大型磁層亞暴環(huán)境試驗系統(tǒng)的關鍵部件之一。文章利用數(shù)值計算方法研究了地磁場對地面低能電子輻照的偏轉效應，分析了電子束流中心偏轉距離和偏轉角隨地磁場強度、電子槍加速電壓的變化規(guī)律，最后通過試驗印證了數(shù)值計算結果。研究的結果對于研制應用于大型磁層亞暴環(huán)境試驗系統(tǒng)的大輻照面發(fā)散型電子槍具有一定的指導意義。

Abstract: 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.

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