摘要
The DC-driven atmospheric-pressure microplasma is generated in a helium gas flowing through the metal tube cathode and is brought into contact with the surface of the water with the immersed Pt anode.By adjusting the gas flow,discharge current and gap distance,self-organized patterns are observed and varied sequentially from the homogeneous spot to the ring-like shape,distinct spot shape and the gearwheel shape on the water surface.The electrode temperature is measured and the gas temperature of the plasma discharge is calculated through the numericalfitting of the second positive system of the spectrum of N2 molecules.It is shown that the pattern transition is related to the electrode and gas temperatures of the plasma.Moreover,specific discretization features of the patterns are shown to appear at certain gas temperatures.
作者
Yanfei CHEN
Bowen FENG
Qing ZHANG
Ruoyu WANG
Kostya(Ken)OSTRIKOV
Xiaoxia ZHONG
陈妍菲;冯博文;张卿;王若愚;欧思聪;钟晓霞(Key Laboratory for Laser Plasmas(Ministry of Education)and State Key Laboratory of Advanced Optical Communication Systems and Networks,Department of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai 200240,People's Republic of China;School of Chemistry,Physics and Mechanical Engineering,Queensland University of Technology,Brisbane QLD 4000,Australia;CSIRO-QUT Joint Sustainable Processes and Devices Laboratory,Lindfield NSW 2070,Australia)
基金
supported by National Natural Science Foundation of China(No.11675109)
Biomedical Engineering Cross Research Foundation of Shanghai Jiao Tong University(YG2016MS12)
the Australian Research Council for partial support。
