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Electric field determination in air plasmas from intensity ratio of nitrogen spectral bands: I. Sensitivity analysis and uncertainty quantification of dominant processes
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SYSNO ASEP 0493304 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Electric field determination in air plasmas from intensity ratio of nitrogen spectral bands: I. Sensitivity analysis and uncertainty quantification of dominant processes Author(s) Šimek, Milan (UFP-V) RID, ORCID
Obrusník, A. (CZ)
Bílek, P. (CZ)
Hoder, T. (CZ)
Bonaventura, Z. (CZ)Number of authors 5 Article number 085013 Source Title Plasma Sources Science & Technology. - : Institute of Physics Publishing - ISSN 0963-0252
Roč. 27, č. 8 (2018)Number of pages 23 s. Language eng - English Country GB - United Kingdom Keywords electric field ; air kinetics ; sensitivity analysis ; uncertainty quantification ; optical emission spectroscopy ; cross-sections ; nitrogen spectral bands Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) R&D Projects GA15-04023S GA ČR - Czech Science Foundation (CSF) Institutional support UFP-V - RVO:61389021 UT WOS 000443257000005 EID SCOPUS 85053104502 DOI 10.1088/1361-6595/aad663 Annotation The ratio of the spectral band intensities of the first negative and second positive spectral systems of molecular nitrogen is a well recognized method for indirect determination of the electric field. It is applied for various plasmas, e.g. barrier and corona discharges for industrial applications or geophysical plasmas occurring in the Earth’s atmosphere. The method relies on the dependence of the intensity ratio R(E/N) of selected bands on the reduced electric field strength. Both experimental and theoretical approaches have been used to determine this dependence, yet there still is a rather large spread in the data available in literature. The primary aim of this work is to quantify the overall uncertainty of the theoretical R(E/N) dependence and identify the main sources of this uncertainty. As the first step we perform sensitivity analysis on a full N2/O2 plasma kinetics model to find a minimal set of processes that are influential for the R(E/N) dependence. It is found to be in agreement with simplified kinetic models generally used. Subsequently, we utilize Monte Carlo-based uncertainty quantification to provide a confidence band for the electric field obtained from the theoretical R(E/N) dependence. Finally, subsequent steps are proposed to significantly reduce the uncertainty of the method. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2019 Electronic address http://iopscience.iop.org/article/10.1088/1361-6595/aad663/meta
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