Simulated Streak Pictures for the Production of Chemical Species in an Atmospheric Pressure Streamer Discharge

Abstract

A streamer discharge model is developed to analyze the characteristics of a pulsed positive streamer discharge for point-to-plane electrodes filled with humid air at atmospheric pressure. The process of chemical species production is studied using simulated streak pictures. The streak pictures clearly show that the primary streamer and secondary streamer have different roles for charged-particle production and subsequent activespecies production.

Detection of negative ions in streamer discharge in air by transient cavity ringdown spectroscopy

“…According to a numerical simulation by Komuro and Ono, pairs of electrons and positive ions are predominantly produced in the primary streamer, and negative ions are minorities in the composition of negative charges [48]. The domination of electrons in negative charges is due to the fact that the reduced electric field is high in the primary streamer.…”

“…The domination of electrons in negative charges is due to the fact that the reduced electric field is high in the primary streamer. The secondary streamer with a much lower reduced electric field enhances the electron attachment frequency to electronegative molecules, and as a result, the electron density becomes negligible in the late phase of the secondary streamer [48]. This process is the conversion from electrons to negative ions, and the plasma density does not charge so much in this period.…”