This paper reports the ignition performance of the iodine-fueled radio frequency(RF)ion thruster(IRIT)at different anode temperaturesT_(a0).The experimental results show that the anode temperature plays important role...This paper reports the ignition performance of the iodine-fueled radio frequency(RF)ion thruster(IRIT)at different anode temperaturesT_(a0).The experimental results show that the anode temperature plays important role on the ignition process of the IRIT.There were two characteristic temperatures related to the anode:the minimum ignition temperatureT_(i0)and the stable ignition temperatureT_(is),which were much lower than the pipeline temperature and the storage tank temperature.AtT_(a0)<T_(i0),it failed to discharge.WhenT_(i0)≤T_(a0)<T_(is),it was ignited with dramatical oscillations.AtT_(a0)≥T_(is),the discharge was stable in a large anode temperature range.The analysis showed that the different discharge phenomena at different anode temperatures were attributed to the change of iodine flow rate during the process of the iodine deposition-clogging and sublimation-clearing inside the thruster.The research helps improve the preheating design of the iodine-fueled electric thruster.展开更多
目的设计一种打印规则,在喷墨技术作为一种高效的生产工具被用于先进制造时提高其喷墨打印精度。方法通过墨滴观测系统分析喷点火频率对喷射状态的影响;分析串扰对喷嘴间的影响,获得高频连续喷射参数,并用高精度打印平台对不同模式进行...目的设计一种打印规则,在喷墨技术作为一种高效的生产工具被用于先进制造时提高其喷墨打印精度。方法通过墨滴观测系统分析喷点火频率对喷射状态的影响;分析串扰对喷嘴间的影响,获得高频连续喷射参数,并用高精度打印平台对不同模式进行测试。表征方法包括传统的图像质量分析方法以及喷墨制造获得的导电网格的导电性能对比。结果使用提出的打印规则,喷墨点火频率达到78 k Hz,打印样张网点面积率误差小于1%,竖线粗糙度方差约等于3μm2。宏观和微观的视觉效果得到提升,打印制作的柔性触摸屏网格线条均匀线宽约65μm,导电性良好。结论优化后的打印规则可以弱化残余振动和串扰对其他喷嘴的影响,在提升打印效率的同时提高打印精度和点火频率,有效地促进压电喷头在喷墨制造领域的应用。展开更多
基金financial support from National Natural Science Foundation of China(No.11805265)Key Laboratory of Micro-Satellites,Chinese Academy of Sciences(No.KFKT201903)is gratefully acknowledged。
文摘This paper reports the ignition performance of the iodine-fueled radio frequency(RF)ion thruster(IRIT)at different anode temperaturesT_(a0).The experimental results show that the anode temperature plays important role on the ignition process of the IRIT.There were two characteristic temperatures related to the anode:the minimum ignition temperatureT_(i0)and the stable ignition temperatureT_(is),which were much lower than the pipeline temperature and the storage tank temperature.AtT_(a0)<T_(i0),it failed to discharge.WhenT_(i0)≤T_(a0)<T_(is),it was ignited with dramatical oscillations.AtT_(a0)≥T_(is),the discharge was stable in a large anode temperature range.The analysis showed that the different discharge phenomena at different anode temperatures were attributed to the change of iodine flow rate during the process of the iodine deposition-clogging and sublimation-clearing inside the thruster.The research helps improve the preheating design of the iodine-fueled electric thruster.
文摘目的设计一种打印规则,在喷墨技术作为一种高效的生产工具被用于先进制造时提高其喷墨打印精度。方法通过墨滴观测系统分析喷点火频率对喷射状态的影响;分析串扰对喷嘴间的影响,获得高频连续喷射参数,并用高精度打印平台对不同模式进行测试。表征方法包括传统的图像质量分析方法以及喷墨制造获得的导电网格的导电性能对比。结果使用提出的打印规则,喷墨点火频率达到78 k Hz,打印样张网点面积率误差小于1%,竖线粗糙度方差约等于3μm2。宏观和微观的视觉效果得到提升,打印制作的柔性触摸屏网格线条均匀线宽约65μm,导电性良好。结论优化后的打印规则可以弱化残余振动和串扰对其他喷嘴的影响,在提升打印效率的同时提高打印精度和点火频率,有效地促进压电喷头在喷墨制造领域的应用。
