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- Title
Correlation of phase resolved current, emission and surface charge measurements in an atmospheric pressure helium jet.
- Authors
Gerling, Torsten; Wild, Robert; Nastuta, Andrei Vasile; Wilke, Christian; Weltmann, Klaus-Dieter; Stollenwerk, Lars
- Abstract
The interaction of an atmospheric pressure plasma jet with two different surfaces (conducting and dielectric) is investigated using a setup with two ring electrodes around a dielectric capillary. For diagnostics, phase resolved ICCD-imaging, current measurements and surface charge measurements are applied. The results show the correlation of plasma dynamics with the deposition of surface charge and electrical current signals. Further, the influence of the distance between surface and jet capillary on the surface charge distribution is presented. A complex discharge dynamic is found with a dielectric barrier discharge between the ring electrodes and back-and-forth bullet propagation outside the capillary. A conducting channel connecting the jet nozzle and the surface is found. This correlates well with the observed charge exchange on the surface. The number of formed channels and the average deposited charge density on the surface is found to be strongly sensitive to the jet distance from the surface.
- Subjects
ATMOSPHERIC pressure; ATMOSPHERIC physics; HELIUM; DIELECTRICS research; SURFACE charges
- Publication
European Physical Journal - Applied Physics, 2015, Vol 71, Issue 2, p20808-p1
- ISSN
1286-0042
- Publication type
Article
- DOI
10.1051/epjap/2015150056