Formation mechanism of bright and dark concentric-ring pattern in dielectric barrier discharge  

作　　者：李彩霞 冯建宇 王舒畅 李骋 冉俊霞 潘宇扬 董丽芳 Caixia LI;Jianyu FENG;Shuchang WANG;Cheng LI;Junxia RAN;Yuyang PAN;Lifang DONG(College of Electronic Information Engineering,Hebei University,Baoding 071002,People’s Republic of China;College of Physics Science and Technology,Hebei University,Baoding 071002,People’s Republic of China;School of Energy and Environmental Engineering,Hebei University of Technology,Tianjin 300401,People’s Republic of China;College of Quality and Technical Supervision,Hebei University,Baoding 071002,People’s Republic of China)

机构地区：[1]College of Electronic Information Engineering,Hebei University,Baoding 071002,People’s Republic of China [2]College of Physics Science and Technology,Hebei University,Baoding 071002,People’s Republic of China [3]School of Energy and Environmental Engineering,Hebei University of Technology,Tianjin 300401,People’s Republic of China [4]College of Quality and Technical Supervision,Hebei University,Baoding 071002,People’s Republic of China

出　　处：《Plasma Science and Technology》2024年第8期50-57,共8页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China(No.12075075);the Natural Science Foundation of Hebei Province,China(Nos.2020201016,A2018201154,A2023201012);Scientific Research and Innovation Team of Hebei University(No.IT2023B03)。

摘　　要：In this work,a bright and dark concentric-ring pattern is reported in a dielectric barrier discharge for the first time.The spatiotemporal dynamics of the bright and dark concentric-ring pattern are investigated with an intensified charge-coupled device and photomultiplier tubes.The results indicate that the bright and dark concentric-ring pattern is composed of three concentric-ring sublattices.These are bright concentric-ring structures,dark concentric-ring structures and wider concentric-ring structures,respectively.The bright concentric-ring structures and dark concentricring structures are alternately distributed.The bright concentric-ring structures are located at the centre of the wider concentric-ring structures.The wider concentric-ring structures first form from the outer edge and gradually develop to the centre.The essence of all three concentric-ring structures is the individual discharge filaments.The optical emission spectra of different sublattices are acquired and analysed.It is found that the plasma parameters of the three concentricring sublattices are different.Finally,the formation mechanism of the bright and dark concentricring pattern is discussed.

关 键 词：dielectric barrier discharge(DBD) concentric-ring pattern spatio-temporal dynamics optical emission spectroscopy wall charges 

分 类 号：O461.2[理学—电子物理学]