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依据电磁监测试验卫星的任务要求,自主研发了等离子体分析仪,用于探测电离层等离子体的离子密度、温度、成分、漂移速度和密度的涨落.等离子体分析仪由阻滞势分析器、离子漂移计和离子捕获计组成,其中离子漂移计用于探测离子垂直轨道方向的漂移速度.通过分析电离层等离子体的离子漂移速度特性,确定仪器的性能指标.离子漂移计传感器采用多层栅网压紧结构,栅网材料选用铍铜,各层栅网之间采用聚酰亚胺绝缘.依据技术指标,详细设计了离子漂移计传感器的窗口尺寸、传感器几何高度和收集极半径.在电子学电路设计时通过前放电路三个可调量程的设计,保证了电路测量范围和精度,并通过实验进行验证.在此基础上,借助意大利国家天体物理研究院行星际物理研究所的地面等离子体环境,完成了离子漂移计的等离子体环境测试.测试结果表明,离子漂移计垂直轨道方向漂移速度测量结果的变化趋势与转台设定值变化趋势一致,且测试精度指标满足设计要求,能够满足电磁监测试验卫星的任务需求.
According to the mission of electromagnetic monitoring and experimental satellites, independent research and development of the plasma analyzer for ionospheric ionospheric plasma ion density, temperature, composition, drift velocity and density fluctuations.Plasma analyzer by the barrier potential analyzer , Ion drift meter and ion trap meter, in which the ion drift meter is used to detect the drift speed of ions in the vertical orbit direction.The ion drift velocity characteristics of the ionospheric plasma are analyzed to determine the performance of the instrument.Ion drift meter sensor adopts multi-layer Grid compaction structure, beryllium copper grid material selection, the use of polyimide insulation between the layers of grids.According to the technical indicators, a detailed design of the ion drift meter sensor window size, sensor geometry and collector radius. Electronic circuit design through the first discharge circuit three adjustable range of the design to ensure the circuit measurement range and accuracy, and verified by experiments.On this basis, with the Italian Institute of Astrophysics Institute of Interplanetary Physics ground Plasma environment, completed the ion drift meter of the plasma environment test results show that the ion drift The trend of the vertical drift velocity measurement results is in line with the changing trend of turntable set point, and the test accuracy index meets the design requirements to meet the mission requirements of the electromagnetic monitoring and test satellite.