Advanced optical diagnostics of non-equilibrium micro-discharges
Project ID:GAP205/12/1709
Provider:Czech Science Foundation
Period:Jan 01, 2012 - Dec 31, 2014
Principal Investigator:RNDr. Milan Šimek, Ph.D.
Co-investigatorsV. Prukner, V. Babický, J. Schmidt

Aims of the project: The project deals with the study of fundamental processes occurring in filamentary streamer discharges produced in atmospheric gases by combining ICCD microscopy with emission spectrometry and various laser-based diagnostics applied with high spatial and time resolution. The project intends to contribute to: 1) deeper understanding of streamer morphology and radiall distribution of important species within streamer filament, 2) determination of excitation and quenching rates of selected N2 excited states and 3)extension of spectrometric diagnostics which are currently used for E/N measurements in N2 and in N2+O2 discharges. We will focus on non-equilibrium kinetics of metastables and radicals, including determination of concentrations, at two different pressure ranges corresponding to: a) technological plasmas at 760 Torr and b) upper-atmospheric transient luminous events at 0.1-10 Torr. Optical diagnostics will be complemented by measurements of electrical characteristics, by analysis of discharge products, and by means of various numerical modeling and simulation approaches.

Results:

Hoder T., Bonaventura Z., Bourdon A., Šimek M.: Sub-nanosecond delays of light emitted by streamer in atmospheric pressure air: Analysis of N2( C3Πu) and N2+(B2Σ u +) emissions and fundamental streamer structure. Journal of Applied Physics 117 [7] (2015) 073302-073302. [ Abstract ] [ Link ]

Šimek M., Ambrico P. F., Prukner V.: LIF study of N2(A3+u, v=0-10) vibrational kinetics under nitrogen streamer conditions. Journal of Physics D-Applied Physics 48 [26] (2015) 265202-265202. [ Abstract ] [ Link ]

Šimek M.: Optical diagnostics of streamer discharges in atmospheric gases. Journal of Physics D-Applied Physics 47 [46] (2014) 463001-463001. [ Abstract ] [ Link ]

Šimek M., Hoder T., Prukner V., Ambrico P. F.: Optical diagnostics of streamers: from laboratory micro-scale to upper-atmospheric large-scale discharges. Journal of Physics: Conference Series. Vol. 550. Bristol : IOP Publishing Ltd, 2014, 012037-012037. ISSN 1742-6588. - (IOPscience. 550). [ Abstract ] [ Link ]
[High-Tech Plasma Processes Conference (HTPP-2014) /13./. Toulouse (FR), 22.06.2014-27.06.2014]

Šimek M., Ambrico P. F., De Benedictis S., Dilecce G., Prukner V., Hoffer P.: LIF diagnostics of OH radicals produced by a single streamer micro-discharge in surface coplanar DBD geometry. Proceedings of XXXI ICPIG Granada 2013. Granada : Instituto de Astrofísica de Andalucía (IAA – CSIC), 2013 - (Gordillo-Vázquez, F.), PS4-039-PS4-039 ISBN N. - (ICPIG. 31). [ Abstract ] [ Link ]
[International Conference on Phenomena in Ionized Gases (ICPIG)/31./. Granada (ES), 14.07.2013-19.07.2013]

Hoder T., Bonaventura Z., Šimek M., Bourdon A.: High-resolution spectroscopic analysis of streamer discharges. Proceedings of XXXI ICPIG Granada 2013, Book of abstracts. Granada : Instituto de Astrofísica de Andalucía (IAA – CSIC), 2013 - (Gordillo-Vázquez, F.), PS3-065-PS3-065 ISBN N. - (ICPIG. 31). [ Abstract ] [ Link ]
[International Conference on Phenomena in Ionized Gases (ICPIG)/31./. Granada (ES), 14.07.2013-19.07.2013]

Parra-Rojas F.C., Passas M., Carrasco E., Luque A., Tanarro I., Šimek M., Gordillo-Vázquez F.J.: Spectroscopic diagnosis of laboratory air plasmas as a benchmark for spectral rotational (gas) temperature determination in TLEs. Proceedings of XXXI ICPIG Granada 2013, Book of abstracts. Granada : Instituto de Astrofísica de Andalucía (IAA – CSIC), 2013 - (Gordillo-Vázquez, F.), PS4-045-PS4-045 ISBN N. - (ICPIG. 31). [ Abstract ] [ Link ]
[International Conference on Phenomena in Ionized Gases (ICPIG)/31./. Granada (ES), 14.07.2013-19.07.2013]

Šimek M., Ambrico P. F., Prukner V.: Formation of N2(A3Σ+u , v = 0–3)metastable species in decaying nitrogen streamer. Journal of Physics D-Applied Physics 46 [48] (2013) 485205-485205. [ Abstract ] [ Link ]