Mixtures of Ar with N₂ are relevant for many areas of plasma applications. In particular, modeling of atmospheric pressure plasma jets for biomedical applications requires precise knowledge of fundamental gas parameters such as the Townsend ionization coefficient α. This study determines α in mixtures of Ar with N₂ in a dark non-self-sustaining Townsend discharge. The discharge current versus electrode spacing was measured in the absolute pressure range of 10–800 Torr and reduced electric field strength E/N range of 40–1000 Td. The density normalized ionization coefficient α/N increases with E/N and decreased with N₂ content in the gas mixture. A good coincidence between measurements and calculations with Bolsig+ was observed. In case when N₂ concentration was between 10% and 50% in the mixture, experimental results were 20%–30% lower than predicted by Bolsig+ calculations. The results of this work were compared with α/N determined in mixtures of He with up to 10% of N₂

Ar与N _{2 的}混合物与等离子体应用的许多领域相关。特别是，用于生物医学应用的大气压等离子体射流建模需要准确了解基本气体参数，例如汤森电离系数α。本研究确定了在黑暗的非自持 Townsend 放电中 Ar 与 N _{2 的}混合物中的α。在 10-800 Torr 的绝对压力范围和40-1000 Td 的降低电场强度E / N范围内测量放电电流与电极间距的关系。密度归一化电离系数α / N随E /N和气体混合物中的N ₂含量降低。观察到使用 Bolsig+ 进行测量和计算之间的良好一致性。如果混合物中的N ₂浓度介于 10% 和 50% 之间，则实验结果比 Bolsig+ 计算的预测值低 20%–30%。将这项工作的结果与在 He 与高达 10% N _{2 的}混合物中测定的α / N进行比较