Document Type

Article

Publication Date

1-2021

DOI

10.1063/5.0033110

Publication Title

AIP Advances

Volume

11

Issue

1

Pages

015247 (8 pp.)

Abstract

At or near atmospheric pressure, most transient discharges, particularly in molecular gases or gas mixture containing molecular gases, result in a space charge dominated transport called a streamer discharge. The excited species generation in such discharges forms the basis for plasma chemistry in most technological applications. In this paper, we simulate the propagation of streamers in atmospheric pressure N2 to understand the energy partitioning in the formation of various excited species and compare the results to a uniform Townsend discharge. The model is fully two-dimensional with azimuthal symmetry. The results show a significantly larger fraction of the energy goes into vibrational excitation of the N2 ground state in a streamer-type discharge in comparison to a Townsend discharge. For lower applied voltages, the anodedirected (negative) steamer is slightly more efficient in channeling energy for excited species production in comparison to a cathode-directed (positive) streamer. Near 70% overvoltage, both types of streamers show very similar energy partitioning, but quite different from a Townsend discharge.

Comments

© 2021 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license. (http://creativecommons.org/licenses/by/4.0/)

Original Publication Citation

Dhali, S. K. (2021, Jan). Generation of excited species in a streamer discharge. AIP Advances, 11(1), Article 015247. https://doi.org/10.1063/5.0033110

ORCID

0000-0002-7886-3987 (Dhali)

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