Dynamic electric potential redistribution and its influence on the development of a dielectric barrier plasma jet

Abstract

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Atmospheric-pressure plasma jets: Effect of gas flow, active species, and snake-like bullet propagation

“…[42][43][44] In our experiment, the (small) differences in the bullet initiation processes between the downstream and upstream jets may result in different lengths of the surface charge areas on the inner surfaces of the tube. This difference may affect the lengths of the plasma plumes.…”

“…Importantly, because the flow strongly affects the charge distribution of the surface charges, it is very difficult (if possible at all) to separate the effects of the gas flow and the surface charges, as is not only evident from our experiments but also from the results of other authors. [42][43][44][45] Further studies involving direct measurements of non-uniform charge distributions are needed to clarify these important issues.…”

The impingement of a kHz helium atmospheric pressure plasma jet on a dielectric surface

“…In this case, the plasma propagates slower than a streamer mechanism and simultaneously in two opposite directions toward the capillary and along the surface. The faint discharges during the negative voltage slope are most likely electrons avalanches induced in the vicinity of positive surface charge when the potential of the source is redistributed all along the inner wall of the capillary as suggested in [31]. The appearance of a sheath on the target surface has already been predicted by [28], however its properties are most likely governed by the gas flow at the target as well as deposited charge.…”

Characterization of an asymmetric DBD plasma jet source at atmospheric pressure

“…This shows that the electrode geometry plays an important role in the plasma bullet propagation inside dielectric tubes and consequently on the plasma plume development in open air. [32][33][34]…”

“…In the literature, it is assumed that charged particles play an important role (surface charge accumulation) in the propagation of the plasma bullet and consequently on the plasma plume length in open air. [32][33][34] Then more emphasis is put on processes seeding charged particles than excited ones.…”