大気中に噴出した誘電体バリア放電ヘリウムプラズマ流の発光特性

抄録

Atmospheric-pressure dielectric-barrier-discharge (DBD) plasma jets are acknowledged as promising tools for the surface treatment of heat-sensitive materials. Although the surface treatment applications of the plasma jets have been made in various fields, the mechanisms of surface treatment by the plasma jets are not well understood. In this work, we performed spectroscopic measurements in the flows where a DBD helium plasma jet was injected into the atmosphere to obtain a better understanding of the surface treatment mechanisms. It was then found that there exist vibrationally exited N2 and the vibrational temperature of the C state of N2 reaches 2400 K.