Characteristics of Discharge Plasma in Liquid using less than 3 kV

Discharge plasma in water is generated by high voltage such as 15 kV. Our previous study succeed with around 3 kV in under water discharges. Our purpose of study is to generate the discharge plasma in water less than 3 kV by capacitor discharges. Electrical capacitance is as follows for discharge: film capacitor of 0.5 mu F and 1.0 mu F. A charger is used DC power supply (HAR-5P6), a size of reactor is 10x10x10 and a solution assuming seawater and tap water. We compared capacitors, conductivity of solution and size of plasma. As a result, the discharge plasma in water was generated at 0.5 mu F and 1.0 mu F under 3 kV. Ratio of generation was changed between 0.5 mu F and 1.0 mu F. Size of discharge plasma in water changed and the capacitor of 1.0 mu F is bigger than 0.5 mu F. Also the capacitor of the assuming seawater is bigger than tap water. In higher conductivity, plasma generation in water was observed lower voltage.