Fig. 5From: Methods of gas purification and effect on the ion composition in an RF atmospheric pressure plasma jet investigated by mass spectrometryTime-resolved measurement showing the significant effect of two purification methods (molecular sieve trap at t=60 s and liquid nitrogen trap at t=180 s) applied to the feed gas line of the μ-APPJ operated at a gas flow rate of 1.4 slm He and an admixture of 0.25 % N2. The admixture of nitrogen is mandatory for stable operating conditionsBack to article page