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《Chinese Journal of Geophysics》 2011-01
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Ionosphere electron density depletion caused by chemical release

HUANG Yong~(1,2),SHI Jia-Ming~(1,2),YUAN Zhong-Cai~(1,2)1 Key Lab of Pulsed Power Laser Technology of State,Hefei Electronic Engineering Institute,Hefei 230037,China 2 Key Lab of Infrared and Low Temperature Plasma of Anhui Province,Hefei Electronic Engineering Institute,Hefei 230037,China  
The propagation of radiowaves can be affected by the ionosphere plasma parameters, such as electron density,so active ionospheric modification has a wide application prospect in military use.Release of a chemically reactive gas into the ionospheric F-region can result in the depletion of electron density.In terms of diffusion process of neutral gas and relevant chemical reactions in the ionosphere,the theoretical model of ionospheric modification is investigated in this paper.The influences of CO_2 and SF_6 gas on the ionosphere of Beijing area are theoretically calculated respectively.The results show that;(1)The localized electron density depletion in Fregions is remarkable after release of 100 kg CO_2 or SF_6 gas,it can form an ionospheric hole which can persist for hours.(2)Compared to CO_2 gas,SF_6 gas has slow diffusion speed and large chemical reaction rates,so it will substantially affect ionosphere and facilitate the formation of artificial ionospheric hole.
【Fund】: 武器装备预研基金(9140A31030310JB39)资助
【CateGory Index】: P352
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