Experimental Determination of N and O-atoms, of N2(A) and N2 (X,v>13) Metastable Molecules and N2+ Ion Densities in the Afterglows of N2-H2, Ar-N2-H2 and Ar-N2-O2 Microwave Discharges

Authors

  • H. Zerrouki Université de Toulouse; CNRS, LAPLACE 118 Route de Narbonne, F-31062 Toulouse Cedex 9, France.
  • A. Ricard Université de Toulouse; CNRS, LAPLACE 118 Route de Narbonne, F-31062 Toulouse Cedex 9, France.
  • J. P. Sarrette Université de Toulouse; CNRS, LAPLACE 118 Route de Narbonne, F-31062 Toulouse Cedex 9, France.

DOI:

https://doi.org/10.9734/bpi/mono/978-93-91595-70-8/CH6

Keywords:

Afterglow of HF discharges, N2-H2, Ar-N2-H2 and Ar-N2-O2 gas mixtures, N and O atoms

Abstract

Early afterglows of N2-H2, Ar-N2-H2 and Ar-N2-O2 flowing microwave discharges are characterized by optical emission spectroscopy. N and O atoms, N(A) and N2 (X,v>13) metastable molecules and N2+ ion densities are determined after calibration by NO titration of N and O-atoms and band intensities measurements of NO, N2 molecules and N2+ ions. In N2-xH2 and Ar-xH2 gas mixtures, the O-atoms are coming from O2 impurities in the discharge.
Concentrations of these active species are compared to the ones obtained in Ar-N2-O2 gas mixtures in which a controlled amount of O2 is added. The densities obtained by these line -ratio measurements are with an uncertainty of 30% for N- atoms and the order of magnitude for O-atoms and N(A) metastable molecules.

Published

2021-11-17

How to Cite

H. Zerrouki, A. Ricard, & J. P. Sarrette. (2021). Experimental Determination of N and O-atoms, of N2(A) and N2 (X,v>13) Metastable Molecules and N2+ Ion Densities in the Afterglows of N2-H2, Ar-N2-H2 and Ar-N2-O2 Microwave Discharges. Plasmas Afterglows With \(N_2\) for Surface Treatments, 136–148. https://doi.org/10.9734/bpi/mono/978-93-91595-70-8/CH6

Issue

Plasmas afterglows with \(N_2\) for Surface Treatments

Section

Contents