The temperature of the optical system load is usually low.Low temperature surface is more easily contaminated by the outgassing molecules,which can degrade the performance and lifetime of the optical system load.Based on the diffusion theory and the classical adsorption kinetics theory,we achieve the adhesive depositing model,and then conduct an experiment on the condensation characteristics of adhesive.The experimental data is consistent with the theoretical model.This model can predict and control the contamination on low temperature surface to ensure normal operation of the satellites.%未来卫星所携带的光学系统载荷温度往往很低,低温表面更容易被出气污染物分子污染,进而可能降低光学系统的性能以及其在轨使用寿命.针对以上问题,本文基于扩散理论和经典吸附动力学理论,获得了胶黏剂出气污染物在低温敏感表面详细的理论模型,利用航天器材料放气污染特性测试标准ASTM E 1559对胶黏剂出气污染物在低温敏感表面出气凝结特性进行了研究.结果表明,实验结果与理论模型具有良好的一致性,获得了胶黏剂出气污染物在低温敏感表面的凝结理论模型,用于对低温表面进行污染预估和控制,从而为污染计算与预测提供了可借鉴的手段.
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