Comparison of excitation dynamics of two-dimensional kHz driven micro-structured plasma devices operated in argon

摘要

The excitation dynamics of two-dimensional micro-structured plasma devices with an inverted equilateral triangular cross section are investigated. This micro-structured plasma devices are operated in argon close to atmospheric pressure. They are characterised by means of optical emission spectroscopy and space and phase resolved wavelength integrated optical emission spectroscopy. Discharge dynamics are compared to those observed for micro-structured atmospheric pressure plasma arrays with discharge cavities of similar crosssection. Intensity profile differences between the positive and negative half period are identified and analysed by spatially resolved measurements. Emission features propagating along the discharge channel at velocities of a few km/s are observed.