Experimental Study and Modeling of a KHz Atmospheric Pressure Streamer Jet in Contact With Water: Application for PAW Generation and Toxicity Evaluation

We present characterization of atmospheric pressure Ar streamer jet, diagnostics of physico‐chemical properties of Plasma Activated Water (PAW), and modeling of Reactive Oxygen and Nitrogen Species (RONS) deposited in PAW. Additional focus is on the toxicity of the created PAW to model plant Lemna minor . The streamer jet is characterized by analyzing electrical properties, gas‐phase characteristics through plasma emission, and laser‐induced fluorescence of OH(X) radicals. Measured OH densities are in the range of 10 20 m −3 depending on the mean power deposited to plasma. Gas phase species are linked to measured RONS concentrations, while modeling results confirmed the production mechanisms of H 2 O 2 , NO₂⁻ and NO₃⁻ species. Experiments with Lemna minor show both favorable and negative effects of PAW depending on the PAW concentration.