title: Striated microdischarges in an asymmetric barrier discharge in argon at atmospheric pressure.
abstract: The investigation of striated microdischarges in barrier discharges in argon at atmospheric pressure is reported. Microdischarges were investigated by means of electrical measurements correlated with intensified CCD camera imaging. The scaling law theory known from low-pressure glow discharge diagnostics was applied in order to describe and explain this phenomenon. The investigated microdischarge is characterized as a transient atmospheric-pressure glow discharge with a stratified column. It can be described by similarity parameters i/r≈0.13 A/cm, pr≈5 Torr cm, and 3<λ/r<5 with the current i, pressure p, interval of subsequent striations λ, and radius of the plasma channel r. An attempt to describe the mechanism of creation of a striated structure is given, based on an established model of the spatial electron relaxation.
authors.affiliation: Leibniz Institute for Plasma Science and Technology, Felix-Hausdorff-Str. 2, D-17489 Greifswald, Germany. hoder@inp-greifswald.de
authors.forename: Tomáš
authors.initials: T
authors.lastname: Hoder
authors.forename: Detlef
authors.initials: D
authors.lastname: Loffhagen
authors.forename: Christian
authors.initials: C
authors.lastname: Wilke
authors.forename: Helge
authors.initials: H
authors.lastname: Grosch
authors.forename: Jan
authors.initials: J
authors.lastname: Schäfer
authors.forename: Klaus-Dieter
authors.initials: KD
authors.lastname: Weltmann
authors.forename: Ronny
authors.initials: R
authors.lastname: Brandenburg