Satellite Dielectric Charging Mechanism And Experimental Research

The research mainly focuses on the spacecraft charging, and involves deep dielectric charging caused by high energetic electrons and surface charging due to space plasma environment. In the aspect of deep dielectric charging, based on the demand of charging model analysis, space high energetic electron environment model for evaluation of deep dielectric charging is established through deep investigation of the characteristics of high energetic electron environment in space. Using this model, we have conducted the computation analysis associated to different conditions, and carried out preliminary measurement on the deep charging test facility established recently. In addition, a surface charging detector is designed and the preliminary verification experiment has been completed, and the preliminary experimental result has been obtained. The arrangement for each chapter is as follows:In chapter I, the concepts of spacecraft charging and discharging, the basic principle, domestic and foreign development and related achievement[0]s of both deep dielectric charging and surface charging are introduced.In chapter II, the main characteristics of the high energetic electrons in the radiation belt, which is related with deep dielectric charging on satellites, are described, and a model about electrons in radiation belt is constructed. The results by the model agree well with those of FLUMIC, a high energetic electron environment model developed by European Space Agency.In chapter III, the mechanism of deep dielectric charging is analyzed, and the method of model construction is provided. At the same time, the preliminary measurement results for the deep dielectric charging and discharging on the test facility are depicted.In chapter IV, using high energetic electron environment model and deep dielectric charging model, an evaluation is made to a certain spacecraft passing through the radiation belt on the risk of its suffering from discharging.In chapter V, the design scheme of the sample instrument[0] on surface charging and discharging effect is introduced. Besides, a preliminary experiment is conducted to evaluate the applicability of the scheme, and basic result is obtained.In the last chapter, the brief summary made to the main work in this paper.