Concentric-ring structures in an atmospheric pressure helium dielectric barrier discharge  

作　　者：尚万里 张远涛 王德真 桑超峰 江少恩 杨家敏 刘慎业 M.G.Kong 

机构地区：[1]Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China [2]School of Electrical Engineering, Shandong University, Jinan 250061, China [3]State Key Laboratory for Materials Modification by Laser, Ion and Electron Beams, School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China [4]Department of Electronic and Electrical Engineering, Loughborough University, Leicestershire LE11 3TU, UK

出　　处：《Chinese Physics B》2011年第1期453-458,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.50537020 and 50528707)

摘　　要：This paper performs a numerical simulation of concentric-ring discharge structures within the scope of a twodimensional diffusion-drift model at atmospheric pressure between two parallel circular electrodes covered with thin dielectric layers. With a relative high frequency the discharge structures present different appearances of ring structures within different radii in time due to the evolvement of the filaments. The spontaneous electron density distributions help understanding the formation and development of self-organized discharge structures. During a cycle the electron avalanches are triggered by the electric field strengthened by the feeding voltage and the residual charged particles on the barrier surface deposited in the previous discharges. The accumulation of charges is shown to play a dominant role in the generation and annihilation of the discharge structures. Besides, the rings split and unify to bring and annihilate rings which form a new discharge structure.This paper performs a numerical simulation of concentric-ring discharge structures within the scope of a twodimensional diffusion-drift model at atmospheric pressure between two parallel circular electrodes covered with thin dielectric layers. With a relative high frequency the discharge structures present different appearances of ring structures within different radii in time due to the evolvement of the filaments. The spontaneous electron density distributions help understanding the formation and development of self-organized discharge structures. During a cycle the electron avalanches are triggered by the electric field strengthened by the feeding voltage and the residual charged particles on the barrier surface deposited in the previous discharges. The accumulation of charges is shown to play a dominant role in the generation and annihilation of the discharge structures. Besides, the rings split and unify to bring and annihilate rings which form a new discharge structure.

关 键 词：dielectric barrier discharge plasma simulation gas discharge 

分 类 号：O461.2[理学—电子物理学]