摘要
航天器在空间环境中飞行时,其表面的不同介质材料表面与等离子体环境相互作用后形成的不等量充电电位达到放电阈值(107 V/m)后,将有可能发生静电放电(ESD)。充电抑制膜是一种基于不等量电位梯度场发射原理的防护材料,当其上下表面电位差达到发射阈值后,充电抑制膜将发射电子从而对航天器结构不等量电位起到减缓作用。文章介绍了真空条件下充电抑制膜场电流发射特性,分析了充电抑制膜场电子发射对航天器表面不等量电位的控制效果,为航天器表面电位控制及减缓提供方法和依据。
Spacecraft operating in space environment will interact with plasma,the differential charging potentials formed on the surface of different dielectric materials reach a certain threshold value,and electrostatic discharge(ESD)will possibly occur.Charging suppression film is a carbon nanomaterial based on the field emission principle of differential potential gradient.When the potential difference between its upper and lower surfaces reaches the electron-emission threshold,the charging suppression film will emit electrons to mitigate the differential potentials of the spacecraft structure.The article introduces the field emission characteristics of the charging suppression film under vacuum conditions,and analyzes the control effect of the field emission of the charging suppression film on the differential potentials on the spacecraft surface,which provides a method and basis for the control and mitigation of the surface potentials of the spacecraft.
基金
国家装备预先研究课题(3050804XXXX)
北京东方计量测试研究所刘尚合院士专家工作站静电研究基金课题(BOIMTLSHJD20221003)。
关键词
主动电位控制
航天器表面充电
静电放电
不等量带电
active potential control
spacecraft surface charging
electrostatic discharge
differential charging
