Device and method for monitoring internal discharge of materials for ground simulation satellite

Abstract

The invention relates to a device and a method for monitoring internal discharge of materials for a ground simulation satellite, which belongs to the technical field of space. The device comprises a vacuum chamber, an electronic gun, a sample base, a vacuum wall, a resistor, a conducting wire, an outer shielding layer, an insulation layer, a vacuum pumping system and an oscillograph. The method comprises the following steps that: a sample is fixedly arranged inside the vacuum chamber to be connected with a discharging signal circuit; the electronic gun is started after the vacuum chamber is vacuum pumped, the electronic gun transmits high-energy electron beams onto the surface of the sample, and the oscillograph is simultaneously started; and when the high-energy electrons are accumulated inside the sample to be saturated, the internal discharge phenomenon occurs, and the discharge waveform is displayed on the oscillograph. Due to the adoption of the device and the method, the electrification environment inside a satellite can be simulated on the ground, the internal discharge pulse can be monitored, so the internal discharge performance of the materials for the satellite can be evaluated.

Description

technical field [0001] The invention relates to a monitoring device and method for internal discharge of materials for simulating stars on the ground, and belongs to the field of space technology. Background technique [0002] The electrification in the satellite is generally caused by the injection of high-energy electrons with an energy of 0.1-10 MeV in space into the material. The above-mentioned high-energy electrons can penetrate satellite structures (such as satellite surface materials, cable sheaths, etc.) and deposit charges on cable insulation layers, printed circuit boards, capacitor components, integrated circuit packages or suspension conductors. If the deposition rate of incident electrons in the medium exceeds its discharge rate, the charge density in the medium will gradually increase, and the electric field strength will also increase accordingly. When the built-in electric field strength exceeds the breakdown strength of the dielectric material, internal dis...

AI Technical Summary

Problems solved by technology

When the transient pulse generated by the discharge is coupled to the electronic system of the spacecraft, it will cause abnormal logic switches, permanent failure of the electronic system or degradation of the performance of sensitive components, resulting in the destruction of the entire system

In addition to electromagnetic interference and damage to electronic equipment, electrostatic discharge can also cause damage to surface materials or degradation of physical properties

As the discharge generates localized heat and material damage in the arcing area, it not only compromises the integrity of the spacecraft, but also alters the physical properties of surface materials, ultimately disrupting the proper functioning of the spacecraft

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