摘要
离子推力器栅极组件中溅射出的钼原子随束流飞出,部分沉积在卫星光学太阳反射镜(OSR)表面,会对其热控性能产生影响。文章结合推力器与OSR片的相对位置,得到钼原子在OSR表面的分布;根据沉积厚度得到钼膜及复合膜的发射率和吸收比分布;根据OSR表面的热平衡方程,得到其温度分布,从而获得了钼原子沉积对OSR片热控性能的影响。结果表明:钼原子沉积引起OSR片的吸收比增加,OSR片温度升高最大为几十摄氏度,对温度变化较为敏感的设备应避免安装在推力器周围。
An analysis is presented of degeneration of the thermal properties of OSR（Optical Solar Reflector）resulting from thin deposits of molybdenum sputtered from ion thruster grid.Based on the relative position of ion thruster and OSR,a deposition distribution of molybdenum atoms on OSR surface is computed,then the absorptance and emittance of composite film are gotten based on the deposition thickness,and finally elevated temperature is analyzed based on the heat balance equation.It is shown that a few monolayers of molybdenum deposition on the OSR surface will seriously degrade its performance with an increase of temperature up to tens of degrees centigrade around the thruster,which means that temperature-sensitive instruments should not be mounted near the ion thruster.
出处
《航天器工程》
北大核心
2016年第3期52-56,共5页
Spacecraft Engineering
关键词
离子推力器
光学太阳反射镜
钼原子沉积
沉积厚度
热控性能
ion thruster
OSR（optical solar reflector）
molybdenum deposition
deposition thickness
thermal property
