Polarization resolved electric field measurements on plasma bullets in N2 using four-wave mixing

M. van der Schans, P. Böhm, S. Nijdam, W.L. IJzerman, U. Czarnetzki

Onderzoeksoutput: Bijdrage aan congresAbstractAcademic

Samenvatting

Atmospheric pressure plasma jets generated by kHz AC or pulsed DC voltages typically consist of discrete guided ionization waves called plasma bullets. In this work, the electric field of plasma bullets generated in a pulsed DC jet with N2 as feed gas is investigated using the four-wave mixing method. In this diagnostic two laser beams, where one is Stokes shifted from the other, non-linearly interact with the N2 molecules and the bullet's electric field. As a result of the interaction a coherent anti-Stokes Raman scattered (CARS) beam and an infrared beam are generated from which the electric field can be determined. Compared to emission-based methods, this technique has the advantage of being able to also probe the electric field in regions around the plasma bullet where no photons are emitted. The four-wave mixing method and its analysis have been adapted to work with the non-uniform electric field of plasma bullets. In addition, an ex-situ calibration procedure using an electrode geometry different from the discharge geometry has been developed. An experimentally obtained radial profile of the axial electric field component of a plasma bullet in N2 is presented. The position of this profile is related to the location of the propagating bullet from temporally resolved images.
Originele taal-2Engels
Pagina'sTR1.004
StatusGepubliceerd - 2016
Evenement69th Annual Gaseous Electronics Conference (GEC 2016), October 10-14, 2016, Bochum, Germany - Ruhr University, Bochum, Duitsland
Duur: 10 okt 201614 okt 2016
Congresnummer: 69
http://www.gec2016.de/
http://www.gec2016.de/

Congres

Congres69th Annual Gaseous Electronics Conference (GEC 2016), October 10-14, 2016, Bochum, Germany
Verkorte titelGEC 2016
Land/RegioDuitsland
StadBochum
Periode10/10/1614/10/16
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