Presentation Information
[9a-E308-8]Influence of Photoionization and Surface Electron Supply on Numerical Simulation of Parallel-Plate DBDs
〇Takuto Nozawa1, Tochikubo Fumiyoshi1, Nakagawa Yusuke1 (1.Tokyo Metropolitan Univ.)
Keywords:
Dielectric Barrier Discharge,Numerical Analysis,Photo ionization
In a numerical analysis of a parallel-plate DBD, we investigated the effects of photoionization and wall electron supply, which are critical to discharge propagation. Analysis using a 1 mm-gap model in dry air revealed that photoionization, as used in streamer discharges, results in an excessive electron density. On the other hand, increasing the photoionization rate improved the streamer propagation speed and alleviated the local concentration of electrons. Furthermore, photoelectron emission from the dielectric surface was shown to promote discharge propagation, while the effect of ion-induced secondary electron emission was found to be negligible.