Device and method for ground-based simulation experimentation of charging effect of high altitude satellite material

Abstract

The invention relates to a device and method for ground-based simulation experimentation of charging effect of a high altitude satellite material and belongs to the field of measurement. The device comprises a shielded chamber, a vacuum chamber, an electron accelerator, a shielding case, a plasma source, a sample table, an insulation washer, a vacuum pumping system, a three-dimensional transmission mechanism, an oscilloscope, an impulse current probe, a non-contact potentiometer, a camera and an adjustable power source. The method comprises the following steps: starting the vacuum pumping system to vacuumize the vacuum chamber; starting the plasma source to simulate a GEO track plasma charging environment; starting the electron accelerator to simulate a GEO track high-energy electron charging environment; and utilizing the impulse current probe and the oscilloscope to monitor the transient discharge impulse of a material sample, utilizing the non-contact potentiometer to monitor the surface electric potential of the material specimen sample, and utilizing the camera to record the secondary discharge phenomenon. Through the adoption of the electron accelerator and the plasma source, the charging environment of a high track in a magnetic substorm can be simulated well; and the device and the method are suitable for measuring the charging effect of various satellite materials.

Description

technical field [0001] The invention relates to a ground simulation test device and method for electrification effect of materials used in high-orbit satellites, and belongs to the field of measurement. Background technique [0002] GEO's space-charged environment consists of two parts. The first is the geomagnetic substorm plasma. When a solar flare occurs, the interaction between the solar wind and the earth’s magnetic field will produce a geomagnetic substorm phenomenon. At this time, the energy in the geosynchronous orbit will be 1 to 50 keV, and the density will be 10 5 ~10 6 m -3 The large-flux plasma within the range will charge the surface of the GEO satellite to more than 10,000 volts; secondly, GEO is at the edge of the outer radiation belt of the earth, the energy of high-energy electrons is 0.1-10MeV, and the flux is 10 7 e / cm 2 In the range of s, the large flux of high-energy electrons is likely to cause the GEO satellite to have an internal charging effect....

AI Technical Summary

Problems solved by technology

At present, my country's understanding of the electrification effect of satellite materials is not deep enough, and there is a lack of effective protection methods and design methods, which cannot fully guarantee the stable operation of GEO orbit satellites.

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