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.
|Title of host publication||Proceedings of the 70th Annual Gaseous Electronics Conference, 6-10 November 2017, Pittsburgh, Pennsylvania|
|Publication status||Published - 9 Nov 2017|
|Event||70th 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 2017 → 10 Nov 2017
|Conference||70th Annual Gaseous Electronics Conference (GEC 2017), November 6-10, 2017, Pittsburgh, Pennsylvania, USA|
|Abbreviated title||GEC 2017|
|Period||6/11/17 → 10/11/17|
Bibliographical noteAbstract only.
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