[21p-A302-12~14] 8.6 Plasma Electronics English Session

5:00 PM - 5:15 PM JST(8:00 AM - 8:15 AM UTC)English Presentation

[21p-A302-12] Evaluation of Reactive Species Production in Atmospheric Pressure Air Discharge
Using a Back-Illuminated Photocathode

〇Sukma Wahyu Fitriani¹, Hideki Yajima², Akimitsu Hatta¹ (1.Kochi Univ. of Tehcnol., 2.ORC Manufacture)

Keywords:

Photoemission-induced plasma,atmospheric pressure plasma

An atmospheric-pressure DC gas discharge was generated stably using a back-illuminated gold photocathode with an excimer lamp of wavelength 172 nm and 222 nm in ambient air. Production of the reactive oxygen and nitrogen species (RONS) from air plasma was confirmed by measuring the UV absorbance of those dissolved in water. The plasma induced by the excimer lamp of 172 nm, produced O₃, H₂O₂ and NO₃^- as the dominant reactive species. In contrast, the plasma induced by the excimer lamp of 222 nm, generated nearly pure NO₂^- as the reactive species.