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Absolute spatially and time‐resolved O, O 3 , and air densities in the effluent of a modulated RF‐driven atmospheric pressure plasma jet obtained by molecular beam mass spectrometry
Author(s) -
Jiang Jingkai,
Luo Yuchen,
Moldgy Ankit,
Aranda Gonzalvo Yolanda,
Bruggeman Peter J.
Publication year - 2020
Publication title -
plasma processes and polymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.644
H-Index - 74
eISSN - 1612-8869
pISSN - 1612-8850
DOI - 10.1002/ppap.201900163
Subject(s) - jet (fluid) , atmospheric pressure , plasma , atmospheric pressure plasma , analytical chemistry (journal) , chemistry , atomic physics , mass spectrometry , beam (structure) , materials science , optics , physics , nuclear physics , mechanics , meteorology , chromatography
In this paper, we report a molecular beam mass spectrometer study of a time‐modulated radiofrequency (RF)‐driven atmospheric pressure plasma jet in Ar + 1% O 2 . Time‐resolved measurements of the absolute density of O 3 during the RF modulation period revealed a temporal increase of O 3 densities at the start and end of the power modulation. This increase correlates with the increase in O 2 due to plasma‐induced transient vortices in the gas jet. Pseudo‐one‐dimensional plug flow modeling of the axial species densities as a function of distance match well with the experimentally recorded trends. The obtained results were used to assess the importance of the O flux in previously reported ClO − production in saline by the same plasma jet.