LIF study of N2(A3+u, v=0-10) vibrational kinetics under nitrogen streamer conditions

0444416 - ÚFP 2016 RIV GB eng J - Článek v odborném periodiku
Šimek, Milan - Ambrico, P. F. - Prukner, Václav
LIF study of N2(A3+u, v=0-10) vibrational kinetics under nitrogen streamer conditions.
Journal of Physics D-Applied Physics. Roč. 48, č. 26 (2015), s. 265202-265202. ISSN 0022-3727. E-ISSN 1361-6463
Grant CEP: GA ČR(CZ) GAP205/12/1709
Institucionální podpora: RVO:61389021
Klíčová slova: nitrogen metastable * streamer * optical diagnostics * laser-induced fluorescence * LIF
Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech
Impakt faktor: 2.772, rok: 2015
http://dx.doi.org/10.1088/0022-3727/48/26/265202

The evolution of individual v = 0–10 vibrational levels of N2(A3+u )metastable species produced by filamentary streamer discharge was investigated by the laser-induced fluorescence technique.Triggered single streamer filament was periodically produced in pure nitrogen at a pressure of 200 torr and metastable species were monitored during the streamer channel decay in the centre of the discharge gap.The observed dynamics of N2(A3+u) vibrational levels follow two very different scenarios: while higher (v > 6) vibronic levels decay exponentially in hundreds of nanoseconds,the populations of lower levels (v ≤ 6) definitely increase,first reaching a local maximum on a microsecond timescale and then decreasing afterwards. Population maxima of N2(A3+u ,v ≤ 6) levels occur after the streamer onset with a certain delay, which decreases with increasing vibrational number.Interpretation of experimental observation based on a 0D kinetic model of the post-discharge period takes into account
Trvalý link: http://hdl.handle.net/11104/0246943