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为系统地了解离子推力器羽流的沉积、溅射污染效应,评估其污染程度,进而指导离子推力器的安装布置位置,本文对20 cm离子推力器的羽流污染效应进行了地面试验研究。实验内容主要采用石英微量天平测量模拟星体敏感部件及太阳能电池帆板等9处不同位置的溅射、沉积污染率。结果显示离子推力器地面试验沉积效应和溅射刻蚀效应同时存在,在半角72°以外的区域主要表现为沉积效应,在半角32°的位置溅射刻蚀效应明显;溅射率随被测点与推力器束流轴线的夹角的增大成Reynolds分布趋势。
In order to systematically understand the deposition and sputtering pollution effects of the ion thruster plume and evaluate its pollution degree, and then to guide the installation position of the ion thruster, the paper conducted a ground test on the plume pollution effect of the 20 cm ion thruster. The experiment contents mainly used the quartz microbalance to measure the sputtering and sedimentation pollution rate in 9 different places such as simulated astral sensitive parts and solar panels. The results show that both the depositional effect and the sputter etching effect exist in the ground test of the ion thruster. The deposition effect is mainly observed in the area outside the half-angle 72 ° and the sputter etching effect is obvious at the position of the half-angle 32 °. The sputtering rate varies with the measured The angle between the point and the thruster beam axis increases to the Reynolds distribution trend.