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 μF and 1.0 μF. A charger is used DC power supply (HAR-5P6), a size of reactor is 10×10×10 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 μF and 1.0 μF under 3 kV Ratio of generation was changed between 0.5μF and 1.0 μF. Size of discharge plasma in water changed and the capacitor of 1.0 μF is bigger than 0.5 μF. Also the capacitor of the assuming seawater is bigger than tap water. In higher conductivity, plasma generation in water was observed lower voltage.