Please use this identifier to cite or link to this item: https://physrep.ff.bg.ac.rs/handle/123456789/425
Title: Electric field measurement in the dielectric tube of helium atmospheric pressure plasma jet
Authors: Sretenović, Goran B. 
Guaitella, Olivier
Sobota, Ana
Krstić, Ivan B.
Kovačević, Vesna 
Obradović, Bratislav 
Kuraica, Milorad 
Issue Date: 28-Mar-2017
Journal: Journal of Applied Physics
Abstract: 
The results of the electric field measurements in the capillary of the helium plasma jet are presented in this article. Distributions of the electric field for the streamers are determined for different gas flow rates. It is found that electric field strength in front of the ionization wave decreases as it approaches to the exit of the tube. The values obtained under presented experimental conditions are in the range of 5-11 kV/cm. It was found that the increase in gas flow above 1500 SCCM could induce substantial changes in the discharge operation. This is reflected through the formation of the brighter discharge region and appearance of the electric field maxima. Furthermore, using the measured values of the electric field strength in the streamer head, it was possible to estimate electron densities in the streamer channel. Maximal density of 4 × 1011 cm−3 is obtained in the vicinity of the grounded ring electrode. Similar behaviors of the electron density distributions to the distributions of the electric field strength are found under the studied experimental conditions.
URI: https://physrep.ff.bg.ac.rs/handle/123456789/425
ISSN: 0021-8979
DOI: 10.1063/1.4979310
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