Document Type

Article

Publication Date

2014

Publication Title

Physics of Plasmas

Volume

21

Issue

7

Pages

073507 (1-7)

DOI

10.1063/1.4890481

Abstract

The atmospheric pressure dielectric barrier discharge in helium is a pulsed discharge in nature and the moment of maximum species densities is almost consistent with peak discharge current density. In this paper, a one-dimensional fluid model is used to investigate the temporal structure of plasma species in an atmospheric He-N2 dielectric barrier discharge (DBD). It is demonstrated that there exist microsecond delays of the moments of the maximum electron and ion densities from the peak of discharge current density. These time delays are caused by a competition between the electron impact and Penning ionizations, modulated by the N2 level in the plasma-forming gas. Besides, significant electron wall losses lead to the DBD being more positively charged and, with a distinct temporal separation in the peak electron and cation densities, the plasma is characterized with repetitive bursts of net positive charges. The temporal details of ionic and reactive plasma species may provide a new idea for some biological processes.

Comments

© 2014 AIP Publishing LLC.

This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in:

Yang, A., Wang, X., Liu, D., Rong, M., & Kong, M. G. (2014). Temporal modulation of plasma species in atmospheric dielectric barrier discharges. Physics of Plasmas, 21(7), 1-7, Article 073507.

and may be found at https://doi.org/10.1063/1.4890481.

Original Publication Citation

Yang, A., Wang, X., Liu, D., Rong, M., & Kong, M. G. (2014). Temporal modulation of plasma species in atmospheric dielectric barrier discharges. Physics of Plasmas, 21(7), 1-7, Article 073507. https://doi.org/10.1063/1.4890481

ORCID

0000-0001-8142-4726 (Kong)

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