A comparison between detailed and configuration-averaged collisional-radiative codes applied to non-local thermal equilibrium plasma

Simple item page
dc.creatorPoirier, Michel
dc.creatorde Dortan, François de Gaufridy
dc.date2007-10-15
dc.date.accessioned2026-07-07T08:36:21Z
dc.date.available2026-07-07T08:36:21Z
dc.descriptionA collisional-radiative model describing nonlocal-thermodynamic-equilibrium plasmas is developed. It is based on the HULLAC (Hebrew University Lawrence Livermore Atomic Code) suite for the transitions rates, in the zero-temperature radiation field hypothesis. Two variants of the model are presented: the first one is configuration averaged, while the second one is a detailed level version. Comparisons are made between them in the case of a carbon plasma; they show that the configuration-averaged code gives correct results for an electronic temperature Te=10 eV (or higher) but fails at lower temperatures such as Te=1 eV. The validity of the configuration-averaged approximation is discussed: the intuitive criterion requiring that the average configuration-energy dispersion must be less than the electron thermal energy turns out to be a necessary but far from sufficient condition. Another condition based on the resolution of a modified rate-equation system is proposed. Its efficiency is emphasized in the case of low-temperature plasmas. Finally, it is shown that near-threshold autoionization cascade processes may induce a severe failure of the configuration-average formalism.
dc.description9 p
dc.identifierhttps://arxiv.org/abs/0710.2754
dc.identifierhttp://arxiv.org/abs/0710.2754
dc.identifierJournal of Applied Physics 101 (2007) 063308
dc.identifierdoi:10.1063/1.2713085
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/140032
dc.subjectPlasma Physics
dc.titleA comparison between detailed and configuration-averaged collisional-radiative codes applied to non-local thermal equilibrium plasma
dc.typetext

Files

Collections

arXiv