Diagnostics of Air Purification Plasma Device by Spatially Resolved Emission Spectroscopy

A non-thermal plasma, air purification device (PlasmaShield®, MD250, Keswick, SA, Australia), was investigated using spatially resolved optical emission spectroscopy. The spectra were measured with two spatial dimensions to analyze and identify the transition lines of excited NO–? (A2?–X2?), N2 (C3?–B3?), N2+ (B2?–X2?) systems. band at 337 316 nm used determine vibrational temperature molecules, TvibN2. It found that average temperatures in x y directions are almost same. Two key operating parameters, supplied power flow, influence temperature. results demonstrate applying higher increases temperature, while changes flow velocity do not affect values. phenomenological plasma (PPT) also estimated from observed PlasmaShield® generates NO only within a narrow region around discharge electrode tip (with peak intensity below 100 µm tip). study shows no presence OH*, O*, other radicals.