Intense Ar Plasma Array Jet With Ring-Type Focusing Electrode

A new plasma array jet with an additional ring-type focusing electrode is proposed to obtain an extended and intense Ar plasma jet focused on a central glass tube at atmospheric pressure. To investigate the role of the ring-type electrode, the sinusoidal voltages of 9 kV and frequency of 30 kHz were applied to three different electrode configurations, such as only ringtype electrode, only probe-type electrodes, and both the ringand probe-type electrodes. As a result, the ring-type electrode is confirmed to play a significant role in spatially focusing the charge particles ignited by the exposed probe-type electrodes, thereby producing a stable and intense Ar plasma jet under atmospheric pressure.