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所属单位：航天学院

发表刊物：CHINESE PHYSICS LETTERS

关键字：RADIATION-INDUCED CONDUCTIVITY INSULATORS

摘要：Surface potential decay of polymers for electrical insulation can help to determine the dark conductivity for spacecraft charging analysis. Due to the existence of radiation-induced conductivity, it decays fast in the first few hours after irradiation and exponentially slowly for the remaining time. The measurement of dark conductivity with this method usually takes the slow part and needs a couple of days. Integrating the Fowler formula into the deep dielectric charging equations, we obtain a new expression for the fast decay part. The experimental data of different materials, dose rates and temperatures are fitted by the new expression. Both the dark conductivity and the radiation-induced conductivity are derived and compared with other methods. The result shows a good estimation of dark conductivity and radiation-induced conductivity in high-resistivity polymers, which enables a fast measurement of dielectric conductivity within about 600 min after irradiation.

ISSN号：0256-307X

是否译文：否

发表时间：2017-06-01

合写作者：Zhou, Kai,方美华,Chi, Wei-Ying,Zhang, Zhen-Long

通讯作者：全荣辉