Emission Characteristics of Surface Microdischarge in Atmospheric-Pressure He/N2 Mixture

The surface microdischarge in atmosphericpressure He/N 2 mixture is studied with an emphasis on its emission characteristics. It is found that the emission intensity and the pattern shape are strongly dependent on the N 2 concentration. The UV emission intensity increases by a factor of nine with th...

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Bibliographic Details
Published in:IEEE transactions on plasma science 2014-10, Vol.42 (10), p.2640-2641
Main Authors: Dong Li, Dingxin Liu, Qiuyue Nie, Dehui Xu, Qiaosong Li, Kong, Michael G.
Format: Article
Language:eng ; jpn
Subjects:
Atmospheric pressure
Discharges (electric)
Educational institutions
Electrodes
emission pattern
He/Nâ‚‚ mixture
Helium
Plasmas
Shape
Surface discharges
surface microdischarge
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Summary:The surface microdischarge in atmosphericpressure He/N 2 mixture is studied with an emphasis on its emission characteristics. It is found that the emission intensity and the pattern shape are strongly dependent on the N 2 concentration. The UV emission intensity increases by a factor of nine with the N 2 concentration up to 5%, after that it decreases moderately. Meanwhile, the luminous pattern expands and then shrinks from grounded mesh edge to the mesh center in the positive half-cycle, while it gradually brightens and then darkens in the central region of a mesh for the negative half-cycle, which is mainly attributed to the distribution of surface charge. In the case of [N 2 ] = 2%-5%, the UV-Vis emission intensity is stronger and the emission pattern is comparable to spatial homogenous, thus benefiting the light emission applications.
ISSN:0093-3813
1939-9375
DOI:10.1109/TPS.2014.2321431