Study of spatial and temporal evolution of Ar and F atoms in SF6/Ar microsecond pulsed discharge by optical emission spectroscopy

作     者：李红月 吴兴伟 李聪 王勇 吴鼎 刘佳敏 冯春雷 丁洪斌 Hongyue LI;Xingwei WU;Cong LI;Yong WANG;Ding WU;Jiamin LIU;Chunlei FENG;Hongbin DING

作者机构：Key Laboratory of Materials Modification by Laser Ion and Electron Beams(Ministry of Education)School of Physics Dalian University of Technology 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2019年第21卷第7期

页      面：69-76页

核心收录：

学科分类：07[理学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 070302[理学-分析化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 

基　　金：supported by National Natural Science Foundation of China (Nos. 11605023, 11805028, and 11705020) the National Key R&D Program of China (No. 2017YFE0301300) the China Postdoctoral Science Foundation (Nos. 2017T100172 and 2016M591423) the Fundamental Research Funds for the Central Universities (Nos. DUT17RC(4)53 and DUT18LK38) 

主　　题：optical emission spectroscopy partial discharge SF6-insulated equipment spatial and temporal evolution 

摘      要：The study of sulfur hexafluoride(SF6) discharge is vital for its application in gas-insulated equipment. Direct current partial discharge(PD) may cause SF6 decomposition, and the decomposed products of SF6, such as F atoms, play a dominant role in the breakdown of insulation systems. In this study, the PD caused by metal protrusion defects is simulated by a needle-plate electrode using pulsed high voltage in SF6/Ar mixtures. The spatial and temporal characteristics of SF6/Ar plasma are analyzed by measuring the emission spectra of F and Ar atoms, which are important for understanding the characteristics of PD. The spatial resolved results show that both F and Ar atom spectral intensities increase first from the plate anode to the needle and then decrease under the conditions of a background pressure of400 Pa, peak voltage of-1000 V, frequency of 2 kHz, pulse width of 60 μs, and electrode gap of 5-9 mm. However, the distribution characteristics of F and Ar are significantly different. The temporal distribution results show that the spectral intensity of Ar decreasesfirst and then increases slowly, while the spectral intensity of F increases slowly for the duration of the pulsed discharge at the electrode gap of 5 mm and the pulse width of40-80 μs.