CO and C2 excited states relaxation in CO2 plasmas derived from a Collisional-Radiative model

15th International Congress on Plasma Physics; 13th Latin American Workshop on Plasma Physics

Bultel, Arnaud^1 ; Schneider, Ioan F.^2 ; Babou, Yacine^3

UMR CNRS 6614 CORIA, Université de Rouen, Avenue de l'Université, 76801 Saint-Etienne du Rouvray, France^1

FRE 3102 LOMC, Universite du Havre, rue Philippe Lebon, 76058 Le Havre, France^2

Von Karman Institute, Chaussée de Waterloo, 72, B-1640 Rhode Saint-Genese, Belgium^3

关键词: Characteristic time;    Collisional radiative model;    Electron-induced process;    Elementary process;    Excited electronic state;    Ground test facilities;    Internal degrees of freedom;    Non-equilibrium steady state;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/511/1/012059/pdf
DOI  :  10.1088/1742-6596/511/1/012059

来源: IOP

【 摘 要 】

In order to explain the behavior of the main excited electronic states of CO and C2molecules formed in CO2entry or ground test facilities plasmas, a time-dependent Collisional-Radiative (CR) model is elaborated. This CR model is then included in the general balance equation of the species to give an insight on the influence of the transport and elementary processes. The related flows are generally observed under relatively low temperature owing to the numerous internal degrees of freedom to be excited, leading to a rather weak ionization degree. The electron-induced processes are even so taken into account: their influence is studied and commented. The conditions to reach non-equilibrium steady states and the related characteristic time scales are discussed as well.