Effect of L-C syntony on micro-gap dielectric barrier discharge at ambient pressure

Summary form only given. Abnormal phenomena are found in some DBD systems in which the discharge performance declines with an increase of applied frequency. In this paper, discharge parameters of a micro-gap DBD are studied and the results are: (1) L-C syntonic phenomena are found in a micro-gap DBD at ambient pressure. The syntonic frequency rests with transformer leak inductance of the power supply and the equivalent capacitance of the dielectric layer, which is a key reason why abnormal phenomena occur in the DBD system. (2) The syntonic in the DBD system not only affects the discharge performance but also damages the transformer and dielectric layers further to cause instability of the discharge system. Therefore the discharge parameters should be optimized to avoid syntony damage. (3) L-C syntonic phenomena can be used in the micro-gap DBD system when the condition of the discharge performance or its stability are ensured. With the L-C syntonic, the DBD system is in a state of resistance, so that the coupling of applied voltage of power is directed to the discharge gap to decrease the output voltage of transformer. The equivalent resistance of the DBD plasma is measured using the resistance to diagnose the evolved processing of the micro-gap DBD using impedance spectroscopy.