Presentation Information
[8p-PB1-2]Study on Impedance Changes in Dielectric Surface Barrier Discharge Plasma Sources Based on Discharge Area Analysis
〇Hisashi Koga1, Mao Oshimoto1, Tsuyoshi Nomiyama1, Tomohiro Kawahshima1, Takahiro Yamauchi2, Hirofumi Takikawa1 (1.Toyo Uni., 2.PIIF Kounou shien)
Keywords:
Atmospheric plasma,Impedance Measurement
This study investigated the factors responsible for impedance variation in a Surface Dielectric Barrier Discharge (SDBD) plasma source by analyzing changes in discharge area. Continuous discharge experiments were conducted using polyvinyl chloride (PVC) as the dielectric material. The discharge area was quantified through image analysis of discharge photographs, and its temporal behavior was compared with the measured impedance.The results showed that the discharge area and impedance exhibited similar temporal trends, both decreasing rapidly after discharge initiation and then gradually approaching a stable state. The reduction in discharge area suggests a decrease in the potential difference across the discharge region and is considered to be related to the observed impedance variation. Furthermore, comparison with previous experiments using a glass dielectric revealed that a similar impedance variation was not observed. This result indicates that the material properties of PVC may contribute to the impedance change. These findings demonstrate that discharge area analysis is useful for understanding the mechanism of impedance variation and suggest that impedance measurement can serve as a diagnostic tool for evaluating the operating condition of plasma sources when direct observation of the discharge is difficult.