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Communication Dans Un Congrès Année : 2008

Homogeneous DBD in N2: 1) LIF, TALIF and electrical measurements

Résumé

In this paper we compare two different discharges that can be obtained in a DBD configuration, that is to say the filamentary discharge (usual regime in atmospheric DBD) with the Atmospheric Pressure Townsend Discharge (APTD), which is a homogeneous regime obtained in nitrogen atmosphere. The aim is to help in the understanding of the processes which control the transition from one regime to the other. To do so, the discharge is characterized through electrical measurements, coupled with optical diagnostics among which Laser Induced Fluorescence (LIF) for radical density measurements. The influence of the addition of small quantities of additives on the stability of the N2 APTD is followed: the absolute density of N, O and NO are reported in N2/O2 and N2/N2O mixtures. One interesting result is that while the electron density is much lower in the APTD than in the filamentary discharge, the Townsend discharge is really efficient for the creation of N atoms: densities as high as 3x10^14 cm^-3 has been measured. These measurements are used to validate numerical models presented in paper ``Homogeneous DBD in N2: II. Simulation in 0D and 1D approaches'' by S. Pancheshnyi et al.

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hal-03988376 , version 1 (14-02-2023)

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  • HAL Id : hal-03988376 , version 1

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Nicolas Gherardi, Et.Touhami Es-Sebbar, Christian Sarra-Bournet, Nicolas Naudé, F. Massines. Homogeneous DBD in N2: 1) LIF, TALIF and electrical measurements. APS Meetings: 61st Annual Gaseous Electronics Conference, Dallas, USA, 2008, Dallas, United States. ⟨hal-03988376⟩
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