Counter-propagating streamers in an atmospheric-pressure helium plasma jet

Hasan, MI ORCID: 0000-0001-6993-933X, Cvelbar, U, Bradley, JW and Walsh, JL ORCID: 0000-0002-6318-0892 (2017) Counter-propagating streamers in an atmospheric-pressure helium plasma jet. JOURNAL OF PHYSICS D-APPLIED PHYSICS, 50 (20). p. 205201.

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Abstract

This study explores an atmospheric pressure plasma jet impinging on a downstream dielectric surface using a 2D numerical plasma fluid model. It is demonstrated that a counter-propagating discharge ignites at the exposed dielectric surface when the discharge is ignited using negative polarity voltage pulses with fall times in the microsecond range. Two distinct streamer discharges are created, a cathode-directed streamer propagating upstream toward the cathode, and an anode-directed streamer propagating parallel to the dielectric surface facing the gas flow. The surface discharge propagating parallel to the dielectric surface deposits negative surface charge. It is also shown that driving an APPJ with a negative applied potential significantly increases the O2 time-averaged flux to the dielectric surface while decreasing the O2+ time-averaged flux.

Item Type:	Article
Additional Information:	journal_title: Journal of Physics D: Applied Physics article_type: paper article_title: Counter-propagating streamers in an atmospheric-pressure helium plasma jet copyright_information: © 2017 IOP Publishing Ltd license_information: cc-by Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI. date_received: 2017-02-06 date_accepted: 2017-03-30 date_epub: 2017-04-21
Uncontrolled Keywords:	atmospheric-pressure, plasma jet, plasma model
Depositing User:	Symplectic Admin
Date Deposited:	27 Apr 2017 15:53
Last Modified:	19 Jan 2023 07:05
DOI:	10.1088/1361-6463/aa6a41
Related URLs:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3007152