【摘要】 空间等离子体环境,是计算机及各类电子设备所面临的新型恶劣环境。通过将设备表面简化为平面,给出了一维粒子层模型。根据静电场理论给出了描述鞘层电位的Poisson方程、等离子体理论和Boltzmann方程,给出了粒子数密度守恒方程。通过牛顿运动定律建立了等离子体的动量方程。基于Poisson方程、粒子数密度守恒方程和等离子体动量方程建立了等离子体鞘层动力学模型。该模型可以给出航天器表面附近等离子体鞘层形成过程的时域特性,如电荷通量、充电电位随时间的变化规律,为电子设备抗空间等离子体防护技术的研究提供理论基础。更多还原

【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.更多还原