Details

Autor(en) / Beteiligte

• Zhang, Shiqiang
• van Gaens, Wouter
• van Gessel, Bram
• Hofmann, Sven
• van Veldhuizen, Eddie
• Bogaerts, Annemie
• Bruggeman, Peter

Titel

Spatially resolved ozone densities and gas temperatures in a time modulated RF driven atmospheric pressure plasma jet: an analysis of the production and destruction mechanisms

Ist Teil von

• Journal of physics. D, Applied physics, 2013-05, Vol.46 (20), p.205202-1-12

Ort / Verlag

Bristol: IOP Publishing

Erscheinungsjahr

2013

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• In this work, a time modulated RF driven DBD-like atmospheric pressure plasma jet in Ar + 2%O2, operating at a time averaged power of 6.5 W is investigated. Spatially resolved ozone densities and gas temperatures are obtained by UV absorption and Rayleigh scattering, respectively. Significant gas heating in the core of the plasma up to 700 K is found and at the position of this increased gas temperature a depletion of the ozone density is found. The production and destruction reactions of O3 in the jet effluent as a function of the distance from the nozzle are obtained from a zero-dimensional chemical kinetics model in plug flow mode which considers relevant air chemistry due to air entrainment in the jet fluent. A comparison of the measurements and the models show that the depletion of O3 in the core of the plasma is mainly caused by an enhanced destruction of O3 due to a large atomic oxygen density.