Density of \(N_2\) Active Species in \(N_2\) DBD Afterglows by Optical Spectroscopy at Atmospheric Gas Pressure

Authors

  • A Ricard Université de Toulouse, CNRS, LAPLACE, 118 route de Narbonne, F-31062 Toulouse cedex 9, France.
  • F. Clément Univ. Pau et Pays Adour, LEGP, F-64000 Pau, France.
  • B. Held Univ. Pau et Pays Adour, LEGP, F-64000 Pau, France.

DOI:

https://doi.org/10.9734/bpi/mono/978-81-19217-08-3/CH26

Keywords:

Cold atmospheric plasmas, dielectric barrier discharges (DBD), N2 afterglows, VUV-IR spectroscopy, N2 active species densities

Abstract

Dielectric Barrier Discharges (DBD) have been used to develop Cold Atmospheric Plasmas and more specifically nitrogen afterglows.The DBD afterglow has been investigated by emission spectroscopy from the VUV (200-300 nm) up to the near IR (1 \(\mu\)m) ranges. A kinetics scheme allowed to determine numerous N2 active species density. The obtained densities decreased slowly  in the afterglow time of  (1- 10)10-3s with mean values of 1015 cm-3 for N- atoms, 1012 cm-3 for N2(A) molecules, 1011 cm-3 for O- atoms (coming from air in impurity) and 1010 cm-3 for N2(B,0) radiative molecules.

The other excited species (N2(B,11), N2 (X,v>4), NO(X,A,B) and O1S.N2) were found at a lower density between 106 and 108 cm-3.

Published

2023-04-20

How to Cite

A Ricard, F. Clément, & B. Held. (2023). Density of \(N_2\) Active Species in \(N_2\) DBD Afterglows by Optical Spectroscopy at Atmospheric Gas Pressure. Plasmas Afterglows With \(N_2\) for Surface Treatments - Edition 3, 108–119. https://doi.org/10.9734/bpi/mono/978-81-19217-08-3/CH26

Issue

Plasmas Afterglows with \(N_2\) for Surface Treatments - Edition 3

Section

Contents