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Indexed by:期刊论文

Date of Publication:2012-10-30

Journal:3rd International Conference on Microelectronics and Plasma Technology (ICMAP)

Included Journals:SCIE、EI、CPCI-S、Scopus

Volume:521

Page Number:261-264

ISSN No.:0040-6090

Key Words:Streamer propagation; Impurity; Atmospheric pressure cold plasma jet

Abstract:The formation and propagation mechanisms of atmospheric-pressure cold plasma jets and the influence of air molecules including the nitrogen and the oxygen molecules on them are investigated by a one-dimensional fluid model in a needle-to-plane discharge in helium. It is shown that the air molecules have significant influence on the bullet velocity and the plasma jet length. As the air impurity level increases, the peak velocity of plasma bullet starts to increase and then drops sharply, and the plasma jet length is decreased exponentially. It is also found that the increase of the applied voltage results in the increase of bullet propagation velocity, which is in good agreement with experimental results. (C) 2011 Elsevier B. V. All rights reserved.