地月平动点尘埃动力学特性原位探测方法研究

Method for in-situ detection of dynamical properties of dust cloud particles at Earth-Moon liberation point

为考察在地月平动点EML4、EML5可能存在的尘埃云的动力学特性,需研究能够覆盖较宽速度范围的尘埃颗粒动力学原位探测方法及技术。针对国内即将实施的Kordylewski尘埃云(KDC)探测任务,已有的栅网式尘埃速度矢量探测方法难以满足对高速颗粒的探测需求。作者提出通过在栅网式探测装置最后增加靶标以同时获得高速和低速颗粒的动力学特性参数,并对气凝胶靶标、电阻丝靶标、金属板靶标、电容式靶标、薄膜靶标及光帘式靶标等的适用性和优缺点进行分析比较后,建议采用栅网‒金属电离复合式探测方法。

In order to investigate the dust cloud at the Earth-moon liberation point EML4 and EML5 and its dynamic characteristics,it is necessary to develop an in-situ detection method and the related technologies for simultaneously studying the dynamics of the particles of the speed in the range of 0 to 30 (km/s).With regard to the Kordylewski Dust Cloud(KDC)exploration mission planned in China,the existing dust velocity vector detection method based on the grids can hardly meet the detection requirement of high-speed particles.By adding a certain kind of the target such as the resistance wire target,the aerogel target,the metal target,behind the grid-type detection device,the particles of different velocities can be detected,at the same time,as well as their velocity,mass and the amount of charge carried.In view of the applicability and the advantages of the above target devices,the method combining the grid and metal ionization is recommended,for the future researches.