Device and method for testing medium material radiation induction conductivity for satellite

Abstract

The invention relates to a device and method for testing medium material radiation induction conductivity for a satellite, and belongs to the field of testing. The device and method for testing the medium material radiation induction conductivity for the satellite is applicable to a test on thicker medium material radiation induction conductivity in an electrification effect evaluation inside the satellite. The device comprises a shielding box body, a 60Co irradiation source, a vacuum-pumping system, an upper electrode plate, a lower electrode plate, a sample table, an electrometer, a stabilized voltage source, a titanium window and a vacuum box. The method comprises the steps of utilizing the 60Co irradiation source to generate gamma ray irradiation medium materials, meanwhile utilizing the stabilized voltage source to exert voltage on electrodes on the medium materials, testing a leakage current of the lower electrode plate through the electrometer, obtaining a voltage value V and a current value I of the surface of the medium materials, and further calculating to obtain radiation induction conductivity of the medium materials. The device and method for testing the medium material radiation induction conductivity for the satellite is applicable to the test on the thicker medium material radiation induction conductivity in the electrification effect evaluation inside the satellite.

Description

technical field [0001] The invention relates to a test device and method for the radiation-induced conductivity of dielectric materials used in satellites, which is suitable for testing the radiation-induced conductivity of thicker dielectric materials in the evaluation of satellite internal charging effects, and belongs to the field of testing. Background technique [0002] Due to the unique functions of dielectric materials, various satellites will inevitably use a large amount of dielectric materials. In the environment of space radiation irradiation, charges will be deposited inside the dielectric material, resulting in internal electrification effect, and the post-production discharge pulse will release a large amount of energy locally in the material, causing damage to satellite components and resulting in complete failure of the satellite. [0003] In recent years, the problem of electrification in spacecraft caused by space radiation environment has attracted more an...

AI Technical Summary

Problems solved by technology

However, in the process of measuring the radiation-induced conductivity of materials by high-energy electron irradiation, due to the shallow penetration depth of electrons, there is an uneven dose rate for thicker media, which brings certain difficulties to the test, while the penetration depth of gamma rays is deep. Uniform excitation can also be achieved for thicker media, which can be used to measure thicker materials

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