Test device and method for inducing molecular pollution in spacecraft cabin through total ionization dose

Abstract

The invention belongs to the technical field of spacecraft space environment effect tests, and particularly relates to a test device and method for inducing molecular pollution in a spacecraft cabin through total ionization dose. The invention provides the test device for vacuum, temperature and space radiation multi-factor induced pollution deposition on the surface of an optical device, and a test and evaluation method for molecular pollution on the surface of a sensitive optical material in a cabin, so that the influence and mechanism of the total ionization dose effect on the molecular pollution effect of the sensitive material in the cabin can be quickly determined, and help is provided for material selection and on-orbit performance evaluation of aerospace engineering.

Description

technical field [0001] The invention belongs to the technical field of spacecraft space environment effect test, and in particular relates to a test device and method for inducing molecular pollution in a spacecraft cabin by total ionization dose. Background technique [0002] 1. Space vacuum environment and pollution effect [0003] When the spacecraft enters the vacuum environment, as the vacuum increases, gas will be released from the surface or interior of the material, causing the vacuum outgassing effect. The sources of gas release mainly include the desorption of gas adsorbed on the surface of the material from the surface in a vacuum environment, the diffusion and desorption of the gas dissolved in the material to the vacuum boundary, and the release of permeable gas from the interface of different pressure differences through the solid material, etc. The outgassing of aerospace materials under vacuum will change the operational performance of the material, causing ...

AI Technical Summary

Problems solved by technology

The outgassing of aerospace materials under vacuum will change the operational performance of the material, causing problems such as dimensional stability and lubrication of the material; the gas cloud generated by the outgassing will transfer from high temperature to low temperature and condense, causing low temperature surface pollution effect, which can change its Thermal and optical performance, radiation performance and electrical performance, causing serious temperature and radiation environmental effects, resulting in thermal and electrical problems, changing the performance of temperature-controlled coatings, reducing the light absorption rate of solar cells and increasing the contact resistance of electrical components, etc. The gas cloud can also interfere with the observation of scientific exploration satellites, and serious pollution will reduce the transparency of the observation window and optical lens; the corona caused by the gas cloud can cause arc discharge, causing the degradation of electrical properties such as solar cell arrays

[0004] 2. The radiation environment in the cabin and the ionization effect on materials

[0012] 4. Optical performance degradation effect in spacecraft cabin

[0013] After the US Chandra X-ray Telescope was in orbit with an advanced CCD imaging spectrometer, it was found that since its launch in 1999, with the increase of the orbit period, the molecular pollutants on the surface of its CCD lens gradually increased, resulting in a gradual decline in optical imaging quality

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