The Charging-discharging Effect Of Space Plasma On The Electronic Equipments

Space plasma is one of the main complex electromagnetic environments, which makes effects on the performance, operational life span and operational reliability of space electronic equipments. It makes disturbances even damages on them by so-called charging and discharging effect. So it must be prevented and overcame by all space electronic devices.This thesis stands on the correlated theories of my profession and at the same time makes use of classical theories such as plasma, plasma sheath and electrodynamics, proposes the idea of researching the space plasma's charging-discharging effect on electronic equipments, studyes the character in the time domain of the charging and discharging effect of space plasma on the electronic equipments:(1) On the condition of without considering the effect of space magnetic field and based on the plasma sheath theory and Boltzmann-Maxwell equations, a charging model of space plasma to electronic equipments in one-dimensional space was build. a space plasma sheath dynamic equations which includes the time variable and the space variable and the two variables are separated was introduced。This paper solved the space plasma sheath dynamic equations by the inverse analytical method and acquired a reasonable time domain solution of space plasma charging to the electronic equipments;(2) Basing on typical space plasma parameters which can cause harmful charging and discharging effect, the paper calculated the highest charging voltage and charging time。Combing with the flight speed of the spacecrafts in cosmos, an analysis was made between the charging time and the fly time when the spacecrafts fly into space plasma environment, which further proved the electronic equipments` failures or damage is caused by the Charging time difference and the potential difference;(3) The paper analyzed respectively the influence of the variation of three different parameters of space plasma to the highest electric potential and the charging time of the electronic equipments be charged, and got the relations between the space plasma parameters and the charging time;(4) Combined with electronic equipments' common grounding methods, the paper analyzed the discharged mechanism of the electronic equipments in different grounding way when the discharging phenomenon occurs。The author hopes this paper could provide necessary references for prevent the disturbances and damages of space plasma to electronic equipments.