Energy Control of Capacity-Coupled Discharge in Atmospheric Air

概要

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Capacity-coupled multi-discharge (CCMD), which is essentially a self-quenching discharge in a manner similar to dielectric barrier discharge (DBD), has recently been developed as an atmospheric pressure plasma source. A coaxial cable is employed as a capacitor to quench the discharge within a short time and controls the energy input into the discharge. A needle-to-plane electrode configuration is used as a discharge gap with 1 mm in gap length. The needle electrode is connected to the quenching capacitor. The discharge is successfully quenched within 30 ns by a 9.35 pF quenching capacitor. The energy into the plasma per one cycle of applied voltage is 0.24 mJ, which is almost two orders of magnitude higher than that of a needle-to-plane DBD (2.5 μJ). Power into the plasma increases stepwise with applied voltage. This stepwise increase agrees with the theoretical prediction.
2006-03-15