关键词: 空间等离子体, 等离子体鞘层, 充放电效应, 恶劣环境

Abstract:

Space plasma is a new rugged environment that computers and other electric equipments have to encounter.A one-dimension model of the particle layer is presented by simplifying the equipment surface to a plane.The Poisson equation is given to reflect the electric potential of plasma sheath according to the electrostatic field theory.The conservation equation of particle number density is provided based on the plasma theory and Boltzmann equation.The momentum equation of plasma is set up by Newtons law of motion.Based on Poisson equation,conservation equation of particle number density,and momentum equation of plasma,a dynamic model on space plasma sheath is established.The model can give such time-domain characteristics of plasma sheath as the variations of charge flux and electric potential with time,which provides a theoretical basis for the research on the protection of electric equipments from space plasma.

Key words: space plasma;plasma sheath;charging and discharging effects;rugged environment