Spectroscopic measurement of the electric field in a helium plasma jet

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Abstract

The electric field in a plasma jet is measured spectroscopically utilizing the Stark-effect. A cold atmospheric pressure helium plasma jet is used, which operates at a μs-pulsed applied voltage of 6 kV, a frequency of 5 kHz and with a helium flow of 1.5 slm. Due to the electric field in the jet, the forbidden and allowed bands of the emission spectrum shift. This is called the Stark-effect. The spectrum of both the He I 492.2 nm line and the He I 447.1 nm line are obtained with an iCCD-camera coupled to a monochromator. From the peak-to-peak wavelength difference between the allowed and forbidden band, the electric field in the jet is calculated. The electric field is determined both inside and outside the capillary of the jet, up to 2 cm in the effluent of the jet. Furthermore, the electric field in the jet is determined, while a target is placed close to the end of the capillary. Grounded and non-grounded, conducting and insulating targets are used and placed at different distances.
Original languageEnglish
Title of host publicationProceedings of the 70th Annual Gaseous Electronics Conference, 6-10 November 2017, Pittsburgh, Pennsylvania
Publication statusPublished - 9 Nov 2017
Event70th Annual Gaseous Electronics Conference (GEC 2017), November 6-10, 2017, Pittsburgh, Pennsylvania, USA - DoubleTree by Hilton Pittsburgh - Green Tree, Pittsburgh, United States
Duration: 6 Nov 201710 Nov 2017
http://www.apsgec.org/gec2017/

Conference

Conference70th Annual Gaseous Electronics Conference (GEC 2017), November 6-10, 2017, Pittsburgh, Pennsylvania, USA
Abbreviated titleGEC 2017
CountryUnited States
CityPittsburgh
Period6/11/1710/11/17
Internet address

Bibliographical note

Abstract only.

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    Hofmans, M., & Sobota, A. (2017). Spectroscopic measurement of the electric field in a helium plasma jet. In Proceedings of the 70th Annual Gaseous Electronics Conference, 6-10 November 2017, Pittsburgh, Pennsylvania http://meetings.aps.org/Meeting/GEC17/Session/RR2.3