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Atmospheric pressure Townsend discharge in pure nitrogen A test case for Ninf2/inf( A 3 ς u + , v ) kinetics under low E/ N conditions
- 1.0565854 - ÚFP 2023 RIV GB eng J - Journal Article
Bílek, Petr - Kuthanová, L. - Hoder, T. - Šimek, Milan
Atmospheric pressure Townsend discharge in pure nitrogen A test case for Ninf2/inf( A 3 ς u + , v ) kinetics under low E/ N conditions.
Plasma Sources Science & Technology. Roč. 31, č. 8 (2022), č. článku 084004. ISSN 0963-0252. E-ISSN 1361-6595
R&D Projects: GA ČR(CZ) GA15-04023S
Grant - others:AV ČR(CZ) StrategieAV21/3
Program: StrategieAV
Institutional support: RVO:61389021
Keywords : atmospheric pressure Townsend discharge * dielectric barrier discharge * kinetic modeling * molecular nitrogen * second positive system of N 2
OECD category: Fluids and plasma physics (including surface physics)
Impact factor: 3.8, year: 2022
Method of publishing: Limited access
https://iopscience.iop.org/article/10.1088/1361-6595/ac7ad1
This work investigates the kinetics of the N2( A3ςu+,v ) state in the atmospheric-pressure Townsend discharge (APTD) operated in a barrier discharge setup in pure nitrogen. To understand the complex nature of the N2( A3ςu+,v ) state we have developed a detailed state-to-state vibrational kinetic model of N2 applicable mainly at low reduced electric fields ( < 200 Td). The kinetic model benefits from the determination of the electric field and the electron density profile using the equivalent electric circuit analysis. The knowledge of both parameters significantly reduces the number of free parameters of the model and thus improves the accuracy of kinetic predictions. The results of the kinetic model are compared with the measured emission spectra of the second positive system and the Herman infrared system of N2. The use of the sensitivity analysis method leads to a better understanding of the role of specific elementary processes in the APTD mechanism and also to the determination of the density of the two lowest vibrational levels of N2( A3ςu+ ), which varies between 1012 and 1014 cm-3 depending on the applied voltage. The determination is important, because the two lowest vibrational levels of N2( A3ςu+ ) are considered to play an important role in the secondary emission of electrons from dielectric surfaces. This work shows that the complex state-to-state kinetic modeling in combination with the phase-resolved emission spectroscopy is the key to a better understanding of the processes responsible for establishing and sustaining the APTD mechanism in nitrogen.
Permanent Link: https://hdl.handle.net/11104/0337346
Number of the records: 1