抄録
The effect of UV irradiation of electrodes on the discharge starting voltage for arc discharge plasma was studied using a low pressure mercury lamp and an UV-LED. The reduction of breakdown voltage via the photoelectric effect of the low pressure mercury lamp and UV-LED was confirmed because the photon energy of the UV lamps exceed the work function of electrodes. The reduction effects depend on the gas, electrode material electrode shape. The reduction rate of about 30 % was realized in the case of Fe electrodes. Especially, the UV-LED is potential alternative to conventional pre-ignition discharge because it can suppress the total energy consumption of the system drastically.
