Determination of NO densities in a surface dielectric barrier discharge using optical emission spectroscopy

Offerhaus, B. and Kogelheide, F. and Jalat, D. and Bibinov, N. and Schulze, J. and Stapelmann, K. and Awakowicz, P.

Volume: 126 Pages:
DOI: 10.1063/1.5094894
Published: 2019

A new computationally assisted diagnostic to measure NO densities in atmospheric-pressure microplasmas by Optical Emission Spectroscopy (OES) is developed and validated against absorption spectroscopy in a volume Dielectric Barrier Discharge (DBD). The OES method is then applied to a twin surface DBD operated in N 2 to measure the NO density as a function of the O 2 admixture (0.1%- 1%). The underlying rate equation model reveals that NO (A 2 ς +) is primarily excited by reactions of the ground state NO (X 2 Π) with metastables N 2 (A 3 ς u +). © 2019 Author(s).

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