The role of associative ionization reactions in the memory effect of atmospheric pressure Townsend discharges in N2 with small O2 additionстатья
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Дата последнего поиска статьи во внешних источниках: 12 января 2022 г.
Аннотация:In this paper we investigate the role of associative ionization reactions in the memory effect of atmospheric pressure Townsend dielectric barrier discharges working in nitrogen with small addition of oxygen. Systematic laser induced fluorescence measurements are carried out in order to provide the absolute densities of N and O atoms and NO molecules for different oxygen concentrations. The input of these data in a dedicated model allows in particular to estimate the rate of the reaction N(2P) + O(3P) → NO+ + e suspected of playing a significant role. According to the obtained results, this reaction is found responsible for a significant enhancement in the production of seed electrons between two successive discharges at 25 ppm of O2, in good agreement with experimental observations. It confirms the importance of this associative ionization reaction in such experimental conditions.