Electric field measurements in a kHz-driven He jet—the influence of the gas flow speed

Abstract

published version features the final layout of the paper including the volume, issue and page numbers. Link to publication General rightsCopyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.• Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal.If the publication is distributed under the terms of Article 25fa of the Dutch Copyright Act, indicated by the "Taverne" license above, please follow below link for the End User

Electric field measurement in the dielectric tube of helium atmospheric pressure plasma jet

“…Ionization wave emits light only from the ionization front-streamer head. Consequently, spatially resolved measurement also reveals a temporal development of the streamer as it was argued by Sobota et al, 13 For example, in the mentioned article where the same discharge is investigated, spatio-temporally resolved electric field measurements were compared with the spatially resolved measurements. The overlap of the data initiated further integrated measurements in order to reduce the duration of time consuming measurements anyhow.…”

“…Atmospheric pressure helium plasma jet of coaxial geometry described in the previous articles is also used in this study. [13][14][15][16] It consists of Pyrex tube with inner diameter of 2.5 mm and outer diameter of 4 mm and two metallic electrodes. Powered electrode is stainless steel pipe with inner and outer diameters of 0.8 and 1.6 mm, respectively.…”

“…Plasma jet plume exists in the limits determined by exact maximal molar fraction of air in helium. 12,13 The previous work of authors was also focused on the plume of the plasma jet. Ionization wave propagation and interaction with targets were investigated by means of fast imaging, electric field, and charge measurement using Stark polarization spectroscopy and Pockels effect.…”

“…Ionization wave propagation and interaction with targets were investigated by means of fast imaging, electric field, and charge measurement using Stark polarization spectroscopy and Pockels effect. [13][14][15][16][17][18][19] This article is devoted to discharge development in a dielectric capillary of the coaxial 30 kHz helium plasma jet with the emphasis on the electric field strength dependence on the gas flow rate. Discharge ignition and dynamics in dielectric tubes are also studied by several groups of authors.…”

Polymer etching by atmospheric‐pressure plasma jet and surface micro‐discharge sources: Activation energy analysis and etching directionality

“…Another work suggests the charged species may be able to permeate significant distances from various APPJ sources. Sobota et al measured the electric field from a He APPJ and showed that it increased to a maximum point approximately 8 mm from the exit of the tube though this varied with gas flow and other parameters. Additionally it should be considered that if charged species are responsible for the enhanced etching at room temperature then the sample may become charged over the duration of the APPJ treatment.…”