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朗缪尔探针的科学探测会受到航天器外表面导电面积与朗缪尔探针传感器有效面积之比大小的影响。如果航天器的外表面导电面积不足够大,朗缪尔探针以扫描电压模式工作时,就会造成航天器地电位的扰动,进而导致朗缪尔探针测量结果的偏差。分析了此问题的物理原理,并进行了相应的理论计算。子午工程探空火箭有效载荷朗缪尔探针在进行科学探测的同时,测量了火箭外表面导电面积与朗缪尔探针传感器有效面积之比不足造成的扰动,测量结果与理论分析基本一致。
The scientific detection of a Langmuir probe is affected by the ratio of the area of the outer surface of the spacecraft to the effective area of the Langmuir probe sensor. If the outer surface of the spacecraft is not sufficiently conductive, the Langmuir probe operating in scan voltage mode will cause perturbation of the spacecraft’s ground potential, which in turn will result in a deviation of the Langmuir probe results. The physical principle of this problem is analyzed and the corresponding theoretical calculation is made. Meridian probe sounding rocket payload Langmuir probe in the scientific exploration at the same time, measuring the rocket outer surface of the conductive area and Langmuir probe sensor effective area ratio caused by the perturbation, the measurement results and theoretical analysis are basically the same.