Influence of nitrogen impurities on an electron-excited helium atoms concentration in the self-sustained normal dc glow discharge at atmospheric pressure

Valery Arkhipenko (1) , Andrey Kirillov (1) , Leanid Simonchik (1) , Siargey Zgirouski (1)

1 LGDP - Laboratory of Gas Discharge Physics

The influence of nitrogen impurities on the parameters of the self-sustained normal dc glow discharge at atmospheric pressure was studied. The concentrations of the low-excited helium atoms in states 2_1s, 2_1p, 2_3s and 2_3p were determined in the atmospheric pressure glow discharge in helium (99.98%He) and in helium with a nitrogen admixture. It was shown that the adding of nitrogen into helium (less 5%) leads to the increase of both interelectrode gap voltage and gas temperature. At the same time the drastically reduction of concentration of the low-excited helium atoms in cathode region even at nitrogen admixture of 0.5 % is occurred.

Mots clés: atmospheric pressure glow discharge; metastable atom; absorption spectroscopy

Domaines: Physique des plasmas [physics.plasm-ph]

Valery Arkhipenko, Andrey Kirillov, Leanid Simonchik, Siargey Zgirouski. Influence of nitrogen impurities on an electron-excited helium atoms concentration in the self-sustained normal dc glow discharge at atmospheric pressure. 2004. ⟨hal-00001864⟩