Atmospheric pressure plasma jets in Helium – the electric field and the charge delivered to a dielectric surface

A. Sobota, E.T. Slikboer, O.Y.N. Guaitella

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Abstract

The family of non-thermal atmospheric pressure discharges has been the focus of intense research of a large number of research groups in the last fifteen years, as they are easy and cheap to assemble and run, and exhibit properties that can be used in surface treatment or biological applications. In this discharge family the non-thermal atmospheric pressure plasma jet commands a good deal of attention.
The mentioned applications all involve the presence of a surface (target for treatment) in the vicinity of the discharge, and it has been shown that in many cases the presence of the surface alters the properties of the discharge. There are many types of surfaces to consider, from metals, dielectrics, to liquid surfaces, and they all leave a different mark on the discharge properties. Still, most of the research has been done on plasma jets expanding freely into the open air.
This paper reports on the electric field and charge measurements delivered to a dielectric surface by an atmospheric-pressure plasma jet working in the bullet mode in helium. Imaging will be presented alongside the measurements of charge, as it will be evident that the charge distribution on the dielectric surface will mirror the observations obtained by imaging. The central results contain the charge packed in one ionization wave leaving the capillary towards the target, around 20 pC. The associated electric fields vary between 3×105 and 6×105 V/m.
Original languageEnglish
Title of host publication19th International Summer School on Vacuum, Electron and Ion Technologies (VEIT), 21-25 September 2015, Sozopol, Bulgaria
Pages42
Publication statusPublished - 2015
Event19th International Summer School on Vacuum, Electron and Ion Technologies (VEIT 2015), September 21-25, 2015, Sozopol, Bulgaria - Sozopol, Bulgaria
Duration: 21 Sep 201525 Sep 2015
http://www.veit.8k.com/

Other

Other19th International Summer School on Vacuum, Electron and Ion Technologies (VEIT 2015), September 21-25, 2015, Sozopol, Bulgaria
Abbreviated titleVEIT 2015
CountryBulgaria
CitySozopol
Period21/09/1525/09/15
Internet address

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  • Activities

    • 1 Invited talk

    Atmospheric pressure plasma jets in Helium – the electric field and the charge delivered to a dielectric surface

    Ana Sobota (Invited speaker)

    15 Sep 2015

    Activity: Talk or presentation typesInvited talkScientific

    Cite this

    Sobota, A., Slikboer, E. T., & Guaitella, O. Y. N. (2015). Atmospheric pressure plasma jets in Helium – the electric field and the charge delivered to a dielectric surface. In 19th International Summer School on Vacuum, Electron and Ion Technologies (VEIT), 21-25 September 2015, Sozopol, Bulgaria (pp. 42). [PR-15]