Eur. Phys. J. Appl. Phys. 42, 63-66 (2008)
https://doi.org/10.1051/epjap:2008036

Production of active species in a N₂ DBD plasma afterglow at atmospheric gas pressure

¹ Université de Toulouse, LAPLACE, CNRS, INPT, UPS, 118 route de Narbonne, 31062 Toulouse, France
² Laboratoire d'Electronique des Gaz et des Plasmas, Université de Pau et des Pays de l'Adour, 64000 Pau, France
³ AcXys Technologies, 38950 Saint-Martin-le-Vinoux, France

Corresponding author: ricard.a@cpat.ups-tlse.fr

Received: 6 July 2007
Revised: 30 October 2007
Accepted: 15 January 2008
Published online: 28 March 2008

Abstract

This paper deals with the optical study of a DBD plasma afterglow generated in nitrogen at atmospheric pressure. Spectroscopic analyses allow identifying active species of this afterglow like molecular species in different energy levels: N₂, NO and N₂O(¹S). By using the NO titration method, the N and O(¹S) densities have been estimated to be respectively, 5.9 × 10¹⁴ cm⁻³ and 2 × 10¹⁰ cm⁻³, in an afterglow guided in a quartz tube of 1 cm in diameter.