Abstract: The deep exploration tasks and nano satellites’rapid development put forward new demands for electrical systems，iodine is widely used because of its low price and easy storage. The research status of iodineapplied in electrical technology are studied in this paper. Thus，firstly the merits of iodine used in electrical sys. tem is analyzed in storage and price. Then the physical，chemical and plasma characteristics are introduced， which can provide guides on the electrical system design and performance improvements. Furthermore，the main problems in storage system，vacuum system and cathode design are discussed detailed. Fianlly the main perfor.mance parameters are summarized on iodine plasma thrusters. The iodine cusped field thruster experiemnts aredone. The experimental results show that the current under xenon and iodine on the same conditions are similarand the corrosion of iodine on the anode and thruster channel are not obvious.

Key words: Iodine；Electrical propulsion；Nano satellites；Storage system；Cusped field thruster

摘要： 深空探测任务和微小卫星的迅速发展给电推进系统提出了新的要求，碘工质由于其价格较低，便于存储等优点得到了广泛应用。概述了碘工质在电推进技术的应用现状，介绍了碘工质作为电推进剂在发射成本与存储方面的优势，分析了碘工质的物理，化学，放电特性，为碘工质电推进系统设计及性能优化提供指导，在此基础上分析了碘工质储供系统，真空系统和阴极设计方面所面临的问题及解决思路，列举了目前国际上报道的碘工质电推力器的性能参数。进行了碘工质会切场推力器点火实验，实验结果发现碘工质与氙工质在相同实验条件下放电电流类似，而且 100min的实验结果显示碘工质对阳极及推力器通道的腐蚀并不明显。

关键词: 碘工质；电推进；小卫星；供储系统；会切场推力器