Production and decay mechanism of atmospheric pressure homogeneous discharge generated by two L-shaped electrodes

Abstract

We investigated the characteristics of the discharge generated by an atmospheric pressure plasma reactor that used two L-shaped electrodes and was driven by bipolar pulses having opposite polarity. Due to the difference in the surface charge distributions on the electrodes, the discharge behaviours vary greatly between the rising and falling stages of the voltage pulse. In all cases, the plasma formed inside the reactor plays an important role in suppressing a filamentary mode outside the reactor, and hence, homogeneous discharge in He can be achieved under an open-air configuration.