SF_6在电离层释放作用过程分析评价  

Modelling and Analysis of SF_6 Injection into Ionosphere

作　　者：白云 史红星[1,2] 王庚 张远鹏[2] 迟卉[2] Bai Yun;Shi Hongxing;Wang Geng;Zhang Yuanpeng;Chi Hui(Protection of National State Key Laboratory of Nuclear metaplasia ,Beijing 102205, China;Institute of Chemical Defense, Beijing 102205, China)

机构地区：[1]国民核化生防护国家重点实验室,北京102205 [2]防化研究院,北京102205

出　　处：《真空科学与技术学报》2018年第5期396-399,共4页Chinese Journal of Vacuum Science and Technology

基　　金：国家"863"高新技术基金项目

摘　　要：SF_6是目前发现的在电离层释放作用效果较好的化学物质之一,本文依据SF_6在电离层的作用过程,从释放过程、扩散迁移过程和化学反应过程三个角度对SF_6在电离层的作用效果进行了分析评价,释放过程中通过计算SF_6在电离层的气化率,评价释放器内SF_6在电离层的利用率;扩散迁移过程中通过计算SF_6在电离层内的扩散系数,评价SF_6在电离层的停留时间以及形成电离层空洞的时间;化学反应过程通过计算分析SF_6的分子结构、反应焓变、反应速率,评价SF_6在电离层内参与消耗电子的快慢。研究结果表明,SF_6气化率较高,释放利用率高;扩散系数较小,干扰持续时间较长;具有较好的电子吸收能力,与电子反应为放热放应,即SF_6是较为理想的用于电离层释放的物质,研究方法和结果为化学物质在电离层释放的相关研究奠定理论基础。Three major stages in SF6 injection into the ionosphere, comprising the gasification, diffusion and chemical reactions, were mathematically modeled and theoretically analyzed in thermodynamics and molecular dynamics to evaluate the effectiveness of SF6 injection. The key variables, including the gasification rate, diffusion coefficient, molecular structure, reaction rate and enthalpy of SF6 in the ionosphere, were calculated to deepen the understanding of the efficiency, diffusion, reaction, electron capture rate of SF6 , and formation time of ionospheric hole as well. The calculated results show that SF6 is an ideal ionospheric modification agent because of the many advantages, including but not limited to the fast gasification rate, high utilization efficiency, small diffusion coefficient, long modification time, strong electron-capture ability, and some heat released in the electron-SF6 reaction.

关 键 词：六氟化硫 化学释放 电离 层效果评价 

分 类 号：P354[天文地球—空间物理学]