Atmospheric-Pressure Air Plasma Jet and Its Striation Discharge Mode for Treatment of Thermally Sensitive Materials

A hollow inner electrode covered with a dielectric tube was inserted into an outer and airflow fed through the electrode. The electrodes were then connected to transformer operated at alternating voltage sinusoidal waveform frequency of 20 kHz. resulting discharge is ejected out from 0.7 mm hole in form plasma jet ambient air. attributes discharged evaluated by monitoring current behavior investigating optical emissions. patterns atmospheric-pressure air striations could be observed naked eye. Furthermore, we reported striation mechanism ion acoustic wave propagation utilizing simple calculation.