PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
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Concentric-ring structures in an atmospheric pressure helium dielectric barrier discharge |
Shang Wan-Li(尚万里)a)†, Zhang Yuan-Tao(张远涛)b), Wang De-Zhen(王德真)c), Sang Chao-Feng(桑超峰)c), Jiang Shao-En(江少恩) a), Yang Jia-Min(杨家敏)a), Liu Shen-Ye(刘慎业)a), and M. G. Kongd) |
a Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, China; b School of Electrical Engineering, Shandong University, Jinan 250061, China; c 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; d Department of Electronic and Electrical Engineering, Loughborough University, Leicestershire LE11 3TU, UK |
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Abstract This paper performs a numerical simulation of concentric-ring discharge structures within the scope of a two-dimensional 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.
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Received: 12 June 2010
Revised: 10 July 2010
Accepted manuscript online:
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PACS:
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52.25.Mq
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(Dielectric properties)
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52.30.Es
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51.50.+v
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(Electrical properties)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 50537020 and 50528707). |
Cite this article:
Shang Wan-Li(尚万里), Zhang Yuan-Tao(张远涛), Wang De-Zhen(王德真), Sang Chao-Feng(桑超峰), Jiang Shao-En(江少恩), Yang Jia-Min(杨家敏), Liu Shen-Ye(刘慎业), and M.~G. Kong Concentric-ring structures in an atmospheric pressure helium dielectric barrier discharge 2011 Chin. Phys. B 20 015201
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