本文選題：微放電 + 二次電子發(fā)射�。� 參考：《稀有金屬材料與工程》2017年09期

【摘要】：金屬材料的二次電子發(fā)射是空間微波部件發(fā)生微放電效應(yīng)的重要機制,微放電效應(yīng)是航天器有效載荷射頻功率增大的限制因素。本實驗通過在金屬銀表面構(gòu)造大尺度聚苯乙烯(PS)微球陣列制備微米尺度的銀膜陷阱結(jié)構(gòu),實現(xiàn)對二次電子發(fā)射的抑制。重點研究了PS微球自組裝方法對自組裝效果的影響及鍍銀方式對銀膜陷阱結(jié)構(gòu)形貌的影響,并對利用PS微球構(gòu)造的銀膜陷阱結(jié)構(gòu)的二次電子發(fā)射性能進(jìn)行研究。結(jié)果表明:蒸發(fā)沉積法中的單基片法可有效實現(xiàn)PS微球的自組裝,電化學(xué)沉積法鍍銀可獲得銀膜陷阱結(jié)構(gòu),且該銀膜陷阱結(jié)構(gòu)的二次電子發(fā)射系數(shù)最大值從2.2降低至1.6。
[Abstract]:The two electron emission of metal materials is an important mechanism for the micro discharge effect of space microwave components. The micro discharge effect is a limiting factor for the increase of the RF power of the spacecraft's effective load. In this experiment, the micrometer scale silver membrane trap structure was prepared by constructing a large scale polystyrene (PS) microsphere array on the metal silver surface, and the two electric power was realized. The effect of self-assembly of PS microspheres on the self-assembly effect and the influence of the silver plating on the structure and morphology of the silver membrane trap are emphatically studied. The two electron emission properties of the silver membrane trap structure using PS microspheres are studied. The results show that the single substrate method in the evaporation deposition method can effectively realize the self microspheres of the PS microspheres. The silver film trap structure can be obtained by electrodeposition and silver plating. The maximum two electron emission coefficient of the silver film trap structure is reduced from 2.2 to 1.6.
【作者單位】： 西安交通大學(xué);中國空間技術(shù)研究院空間微波技術(shù)重點實驗室;陜西科技大學(xué);
【基金】：空間微波技術(shù)重點實驗室基金資助(9140C530101130C53013,9140C530101140C53231)
【分類號】：TG178

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