Impact of electrical grounding conditions on plasma–liquid interactions using Thomson scattering on a pulsed argon jet

Abstract The interaction between an argon plasma jet excited using microsecond duration voltage pulses and a liquid target was examined using Thomson scattering to quantify the temporal evolution of the electron density and temperature. The electrical resistance between a liquid target and the elect...

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Autores principales:	Elmar Slikboer, James Walsh
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/de8eb8f885d74249a4a6e2b87fddc479
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spelling	oai:doaj.org-article:de8eb8f885d74249a4a6e2b87fddc4792021-12-02T17:19:16ZImpact of electrical grounding conditions on plasma–liquid interactions using Thomson scattering on a pulsed argon jet10.1038/s41598-021-97185-82045-2322https://doaj.org/article/de8eb8f885d74249a4a6e2b87fddc4792021-09-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-97185-8https://doaj.org/toc/2045-2322Abstract The interaction between an argon plasma jet excited using microsecond duration voltage pulses and a liquid target was examined using Thomson scattering to quantify the temporal evolution of the electron density and temperature. The electrical resistance between a liquid target and the electrical ground was varied from 1 to $$680\, \text {k}\Omega $$ 680 k Ω to mimic different conductivity liquids while the influence of the varying electrical properties on the electron dynamics within the plasma were examined. It was demonstrated that the interaction between the plasma jet and a liquid target grounded via a high resistance resulted in typical dielectric barrier discharge behaviour, with two discharge events per applied voltage pulse. Under such conditions, the electron density and temperature reached a peak of $$1\cdot 10^{15}\, \text {cm}^{-3}$$ 1 · 10 15 cm - 3 and 3.4 eV, respectively; with both rapidly decaying over several hundreds of nanoseconds. For liquid targets grounded via a low resistance, the jet behaviour transitioned to a DC-like discharge, with a single breakdown event being observed and sustained throughout the duration of each applied voltage pulse. Under such conditions, electron densities of $$2{-}3 \cdot 10^{15}\, \text {cm}^{-3}$$ 2 - 3 · 10 15 cm - 3 were detected for several microseconds. The results demonstrate that the electron dynamics in a pulsed argon plasma jet are extremely sensitive to the electrical characteristics of the target, which in the case of water, can evolve during exposure to the plasma.Elmar SlikboerJames WalshNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Elmar Slikboer James Walsh Impact of electrical grounding conditions on plasma–liquid interactions using Thomson scattering on a pulsed argon jet
description	Abstract The interaction between an argon plasma jet excited using microsecond duration voltage pulses and a liquid target was examined using Thomson scattering to quantify the temporal evolution of the electron density and temperature. The electrical resistance between a liquid target and the electrical ground was varied from 1 to $$680\, \text {k}\Omega $$ 680 k Ω to mimic different conductivity liquids while the influence of the varying electrical properties on the electron dynamics within the plasma were examined. It was demonstrated that the interaction between the plasma jet and a liquid target grounded via a high resistance resulted in typical dielectric barrier discharge behaviour, with two discharge events per applied voltage pulse. Under such conditions, the electron density and temperature reached a peak of $$1\cdot 10^{15}\, \text {cm}^{-3}$$ 1 · 10 15 cm - 3 and 3.4 eV, respectively; with both rapidly decaying over several hundreds of nanoseconds. For liquid targets grounded via a low resistance, the jet behaviour transitioned to a DC-like discharge, with a single breakdown event being observed and sustained throughout the duration of each applied voltage pulse. Under such conditions, electron densities of $$2{-}3 \cdot 10^{15}\, \text {cm}^{-3}$$ 2 - 3 · 10 15 cm - 3 were detected for several microseconds. The results demonstrate that the electron dynamics in a pulsed argon plasma jet are extremely sensitive to the electrical characteristics of the target, which in the case of water, can evolve during exposure to the plasma.
format	article
author	Elmar Slikboer James Walsh
author_facet	Elmar Slikboer James Walsh
author_sort	Elmar Slikboer
title	Impact of electrical grounding conditions on plasma–liquid interactions using Thomson scattering on a pulsed argon jet
title_short	Impact of electrical grounding conditions on plasma–liquid interactions using Thomson scattering on a pulsed argon jet
title_full	Impact of electrical grounding conditions on plasma–liquid interactions using Thomson scattering on a pulsed argon jet
title_fullStr	Impact of electrical grounding conditions on plasma–liquid interactions using Thomson scattering on a pulsed argon jet
title_full_unstemmed	Impact of electrical grounding conditions on plasma–liquid interactions using Thomson scattering on a pulsed argon jet
title_sort	impact of electrical grounding conditions on plasma–liquid interactions using thomson scattering on a pulsed argon jet
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/de8eb8f885d74249a4a6e2b87fddc479
work_keys_str_mv	AT elmarslikboer impactofelectricalgroundingconditionsonplasmaliquidinteractionsusingthomsonscatteringonapulsedargonjet AT jameswalsh impactofelectricalgroundingconditionsonplasmaliquidinteractionsusingthomsonscatteringonapulsedargonjet
_version_	1718381054987862016

Impact of electrical grounding conditions on plasma–liquid interactions using Thomson scattering on a pulsed argon jet

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