Optimal Pulse Voltage Waveform for a Xenon Barrier Discharge Lamp using both an Inner Electrode and an External Electrode
When applying a pulsed voltage to a discharge tube using dielectric barrier discharge, discharge occurs two times in a pulse at a rising and a falling edge of a voltage pulse. The timing of the second discharge can be changed by controlling the pulse width. In this study the influence of the pulse width on the luminance of the barrier discharge lamp with an inner electrode is investigated. The lamp used in this study has two electrodes, one is set in the lamp and the other is set on the outside surface of the lamp. Internal electrode is connected to the high voltage side and the external electrode is connected to the ground side. Luminance is observed under the condition of pulse repetition frequency of 10 kHz, peak voltage from 1 kV to 3 kV and pulse width from 2 μs to 98 μs. Luminance took almost same value from 30 μs to 90 μs, whereas it decreased by both deceasing the pulse width less than 30 μs and increasing it more than 90 μs. It means that the higher luminance is obtained by avoiding the overlap of the two radiations at rising and falling edge of applied voltage.