Nitrogen metastable (N2(A 3 Σu                         +)) in a cold argon atmospheric pressure plasma jet: Shielding and gas composition

Sylvain Iseni; Peter J. Bruggeman; Klaus Dieter Weltmann; Stephan Reuter

doi:10.1063/1.4948535

Nitrogen metastable (N₂(A ³ Σ_u ⁺)) in a cold argon atmospheric pressure plasma jet: Shielding and gas composition

Sylvain Iseni, Peter J. Bruggeman, Klaus Dieter Weltmann, Stephan Reuter

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Abstract

N₂(A ³ Σ_u ⁺ metastable species are detected and measured in a non-equilibrium atmospheric pressure plasma jet by laser induced fluorescence. A shielding device is used to change the ambient conditions additionally to the feeding gas composition. Varying the amount of N₂ and air admixed to the feeding gas as well as changing the shielding gas from N₂ to air reveals that the highest N₂(A ³ Σ_u ⁺ is achieved in the case of air admixtures in spite of the enhanced collisional quenching due to the presence of O₂. The reasons for these observations are discussed in detail.

Original language	English (US)
Article number	184101
Journal	Applied Physics Letters
Volume	108
Issue number	18
DOIs	https://doi.org/10.1063/1.4948535
State	Published - May 2 2016
Externally published	Yes

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Publisher Copyright:
© 2016 Author(s).

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