An investigation of dielectric barrier discharge in Ar and Ar/NH3 mixture using cross-correlation spectroscopy

摘要: Dielectric barrier discharges (BDs) are known to operate in two distinctive modes. The filamentary mode of BD is characterized by a large number short lasting spatially bounded microdischarges. This type discharge typical for most cases BDs at atmospheric pressure. Under some specific conditions another form may arise. In this plasma uniformly covers the whole electrode area. usually referred as diffuse or homogeneous BD.This work presents studies argon and its transition ammonia addition. were investigated means cross-correlation spectroscopy. Particularly, influence shape, gap admixture on development studied. measurement offers results with high temporal spatial resolution which useful comparison numerical models.The obtained include electrical current several admixtures argon. appeared above 3 vol%. observed propagation streamer pure different configurations presented. When compared velocity decreased 0.1 vol% admixture. With increasing concentration increases again. behaviour presented impurities was included report. basic model kinetic included. For reduced electric field below 10 Td electron drift much higher argon–ammonia mixture than