Formation of white-eye pattern with microdischarge in an air dielectric barrier discharge system

TL;DR

This paper reports the first observation of white-eye pattern formation in an air dielectric barrier discharge system, revealing the development of various discharge patterns and their underlying dynamics.

Contribution

It introduces the first observation of white-eye pattern in air dielectric barrier discharge and analyzes its formation mechanism through pattern evolution and resonance interactions.

Findings

White-eye pattern observed for the first time in air dielectric barrier discharge.

Pattern development follows a sequence from random spots to chaos with increasing voltage.

White-eye pattern results from a 3-wave resonance interaction.

Abstract

We report on the first observation of white-eye pattern in an air dielectric barrier discharge. The patterned discharges undergo a development as following: random spots - quasihexagonal pattern - hexagonal pattern (type I) - hexagonal pattern (type II) - white-eye pattern - chaos as the voltage is increased. The spatiotemporal characteristics of patterned discharges are investigated by using an optical method. Results show that the two discharge modes, uniform mode and filamentary mode, are actually two different spatial presentations of the same origin: the microdischarge. From the viewpoint of pattern dynamics, the white-eye pattern results from a 3-wave resonance interaction.