N2(A3+u) behaviour in a N2-NO surface dielectric barrier discharge in the modulated ac regime at atmospheric pressure

0347294 - ÚFP 2011 RIV GB eng J - Journal Article
Šimek, Milan - Ambrico, P. F. - Dilecce, G. - Prukner, Václav - Schmidt, Jiří - De Benedictis, S.
N2(A3+u) behaviour in a N2-NO surface dielectric barrier discharge in the modulated ac regime at atmospheric pressure.
Journal of Physics D-Applied Physics. Roč. 43, č. 12 (2010), s. 124003-124003. ISSN 0022-3727. E-ISSN 1361-6463
R&D Projects: GA ČR GA202/08/1106
Institutional research plan: CEZ:AV0Z20430508
Keywords : surface barier discharge * laser induced fluorescence * metastables * nitric oxide
Subject RIV: BL - Plasma and Gas Discharge Physics
Impact factor: 2.105, year: 2010
http://iopscience.iop.org/0022-3727/43/12/124003/pdf/0022-3727_43_12_124003.pdf

Optical, electrical and discharge product measurements were performed in order to reveal the behaviour of N2(A3+u) metastables in a surface dielectric barrier discharge (DBD) driven in N2 with small NO admixtures in a modulated ac regime. Metastable species were detected both in a thin surface plasma layer and in the space afterglow through plasma induced emission and optical-optical double resonance laser induced fluorescence, respectively. Basically, the observed N2(A3+u) species follow the discharge current oscillations in the plasma layer, while they evolve on a millisecond time scale due to diffusion through the space afterglow. Emission spectrometry provides a rough estimation of average metastable concentration in a thin surface plasma layer similar to 9x1013 cm-3. Fluorescence measurements then allow an upper estimation of metastable concentration in the space afterglow <= 1x1012 cm-3.
Permanent Link: http://hdl.handle.net/11104/0188100