Atmospheric pressure 4 Carrier concentration 4 Current voltage curve 4 Direct current plasmas 4 Electron density measurement 4 Electron temperature Heavy particles 4 Ion saturation 4 Ion saturation current 4 Kinetic equilibrium 4 Langmuir probe diagnostics 4 Langmuir probe measurements 4 Langmuir probes 4 Large deviations 4 Nitrogen flow rates 4 Nominal power levels 4 Nonlocal thermal equilibrium 4 Plasma jets 4 Probes 4 Radial profiles 4 Spectroscopic technique 4