Multiple current peaks and spatial characteristics of atmospheric helium dielectric barrier discharges with repetitive unipolar narrow pulse excitation  

作　　者：Xiangyu ZHOU Qiao WANG Dong DAI Zeen HUANG 周翔宇;王乔;戴栋;黄泽恩(School of Electric Power,South China University of Technology,Guangzhou 510641,People's Republic of China)

机构地区：[1]School of Electric Power,South China University of Technology,Guangzhou 510641,People's Republic of China

出　　处：《Plasma Science and Technology》2021年第6期21-29,共9页等离子体科学和技术（英文版）

基　　金：supported by National Natural Science Foundation of China(No.51877086)。

摘　　要：Atmospheric dielectric barrier discharges driven by repetitive unipolar narrow pulse excitation are investigated numerically by using one-dimensional fluid models.The one-dimensional simulation focuses on the effects of applied voltage amplitude,pulse repetition frequency,gap width andγcoefficient on the multiple-current-pulse(MCP)discharge.The results indicate that the MCP behavior will lead to the stratification of electron density distribution in axial direction.Traditional MCP manipulating methods,such as reducing the applied voltage amplitude,increasing the applied voltage frequency,adjusting the gap width,cannot regulate MCPs exhibiting in this work.Further analyses reveal that the increasing electric field of the cathode fall region is the basis for the emergence of MCP behavior.

关 键 词：dielectric barrier discharges narrow pulse excitation multiple-current-pulse discharge electric field cathode fall region 

分 类 号：O461[理学—电子物理学]