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Indexed by:期刊论文

Date of Publication:2011-01-01

Journal:CHINESE PHYSICS B

Included Journals:SCIE、EI、ISTIC、Scopus

Volume:20

Issue:1

ISSN No.:1674-1056

Key Words:dielectric barrier discharge; plasma simulation; gas discharge

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 with in 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.