Electric and energetic properties of a DC glow discharges in a 97%Helium-3%Krypton gas mixture
In this study, we present the electric and energetic properties of a DC glow discharge in a 97%He-3%Kr gas mixture at low pressure. The model is the fluid order two. It is about of the continuity equation, the momentum transfer and the energy equations, and the Poisson's equation. The parameters of particle transport and their rate coefficients are strictly depends on mean electron energy, and they are calculated by using the BOLSIG+ software. The results show that the krypton ion density is more important than the helium ion density despite the presence of more constant background helium gas density in the mixture. The current density is reached to 0.1383 mA/cm2 for 200 Volt applied potential under 2 Torr pressure in a gas mixture. The spatio-temporal evolution of both electric and energetic characteristics are shown and discussed, as well as their spatial distribution in the steady state. The maximum values of the helium metastable atom density is 1.9514 x 109 cm-3, and for krypton metastable atom density is 1.1486 x 107 cm-3. The model is verified experimentally and theoretically in the particular case.
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