  Dielectric barrier discharge (DBD) in air is characterized applying current
measurement, numerical simulation and optical emission spectroscopy (OES). For
OES, a non-calibrated spectrometer is used. This diagnostic method is
applicable when cross-sectional area of the active plasma volume and current
density can be determined. The nitrogen emission in the spectral range of 380
nm- 406 nm is used for OES diagnostics. Electric field in the active plasma
volume is determined applying the measured spectrum, well-known Frank-Condon
factors for nitrogen transitions and numerically- simulated electron
distribution functions. The measured electric current density is used for
determination of electron density in plasma. Using the determined plasma
parameters, the dissociation rate of nitrogen and oxygen in active plasma
volume are calculated, which can be used by simulation of the chemical
kinetics.
