Research on the Calibration of Ion Drift Meter aboard CSES
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摘要: 离子漂移计用于探测离子垂直轨道方向的漂移速度.离子漂移计的定标实验包括电子学定标和等离子体环境定标.通过对自行研制的电磁监测试验卫星离子漂移计的电子学定标方法研究，测试得到离子漂移计的噪声、电流测量范围、增益和修正系数以及温漂等电子学定标参数.测试结果表明，离子漂移计的电子学性能优于设计要求，满足科学探测需求.此外，借助于意大利INAF-IAPS等离子体测试实验设备模拟电离层等离子体环境，对离子漂移计的等离子体环境定标问题进行了分析研究.等离子体环境下的测试结果表明，该离子漂移计在特征点处测量结果满足仪器指标要求，能够正确探测离子横向速度，且其相对精度满足设计要求.Abstract: The scientific objective of Ion Drift Meter (IDM) is to measure ion drift velocity, which is perpendicular to the direction of the satellite flight on orbit. IDM calibration includes electronics calibration and plasma environment test. The measurement precision of velocity is validated through testing electronics noise. The velocity measurement range is calibrated by testing the current measurement range. The method and results of gain and temperature drift of electronics circuit testing are introduced. The plasma environment test of IDM has been carried out in INAF-IAPS plasma environment test instrument. The experimental results show that the detector has good performances and will contribute much to the space plasmas parameters monitoring.
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