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Article Dans Une Revue Physical Review E : Statistical, Nonlinear, and Soft Matter Physics Année : 2002

Influence of Ar2(+) in an argon collisional-radiative model

Résumé

A nonlinear time-dependent collisional-radiative model for recombining argon is presented. Reactions involving Ar-2(+) are taken into account and their influence is discussed. It is shown that Ar-2(+) may increase the time to reach the quasi-steady-state by a factor of 100. The calculation of the recombination rate coefficient at the quasi-steady-state is presented. An analytical expression is derived and compared with existing literature values. The importance of the increase of the quasi-steady-state time is illustrated by comparisons of excited levels population densities distribution measured in a fast moving plasma where the mechanical time scale is sufficiently short to provide a time-dependent chemistry in a reference frame moving with the flow. The high sensitivity of the results towards the electron number density is pointed out. Finally, the influence of the processes involving Ar-2(+) on the excitation temperature is discussed.
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Dates et versions

hal-00258677 , version 1 (23-02-2008)

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Arnaud Bultel, Bruno van Ootegem, Anne Bourdon, Pierre Vervisch. Influence of Ar2(+) in an argon collisional-radiative model. Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, 2002, 65 (4), pp.16. ⟨10.1103/PhysRevE.65.046406⟩. ⟨hal-00258677⟩
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