Electron density change of atmospheric-pressure plasmas in helium flow depending on the oxygen/nitrogen ratio of the surrounding atmosphere

Electron density change of atmospheric-pressure plasmas in helium flow depending on the oxygen/nitrogen ratio of the surrounding atmosphere

Laser Thomson scattering was applied to an atmospheric-pressure plasma produced in a helium (He) gas flow for measuring the spatial profiles of electron density (ne) and electron temperature (Te). Aside from the He core flow, the shielding gas flow of N2 or synthesized air () surrounding the He flow...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics Vol. 55; no. 6; pp. 66101 - 66105
Main Authors: Tomita, Kentaro, Urabe, Keiichiro, Shirai, Naoki, Sato, Yuta, Hassaballa, Safwat, Bolouki, Nima, Yoneda, Munehiro, Shimizu, Takahiro, Uchino, Kiichiro
Format: Journal Article
Language:English
Published: The Japan Society of Applied Physics 01-06-2016
Online Access:Get full text
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Summary:Laser Thomson scattering was applied to an atmospheric-pressure plasma produced in a helium (He) gas flow for measuring the spatial profiles of electron density (ne) and electron temperature (Te). Aside from the He core flow, the shielding gas flow of N2 or synthesized air () surrounding the He flow was introduced to evaluate the effect of ambient gas components on the plasma parameters, eliminating the effect of ambient humidity. The ne at the discharge center was 2.7 × 1021 m−3 for plasma generated with N2/O2 shielding gas, 50% higher than that generated with N2 shielding.
ISSN:0021-4922
1347-4065
DOI:10.7567/JJAP.55.066101