关键词: 人工等离子体, 时间演化, 等离子体发生器

Abstract: By analyzing the time evolution of an artificial plasma cloud at high altitude‚we found that there are two zones, exponential attenuation zone and linear attenuation zone,in the spatial distribution of electron density of artificial
plasma clouds．The plasma generator’s particle flux density only contributes to the exponential attenuation zone,and has no effect on the linear attenuation zone．The average electron density in linear attenuation zone is about 10^－5 of neutral particle density, and can overcast wider area．The conclusion will be valuable to the research of electromagnetic wave and artificial plasma interaction, the plasma invisibleness research of missile and special aerocraft,and the design of artificial plasma source．

Key words: Artificial plasma, Time evolution, Plasma source