TY - JOUR
T1 - Electron density change of atmospheric-pressure plasmas in helium flow depending on the oxygen/nitrogen ratio of the surrounding atmosphere
AU - Tomita, Kentaro
AU - Urabe, Keiichiro
AU - Shirai, Naoki
AU - Sato, Yuta
AU - Hassaballa, Safwat
AU - Bolouki, Nima
AU - Yoneda, Munehiro
AU - Shimizu, Takahiro
AU - Uchino, Kiichiro
PY - 2016/6
Y1 - 2016/6
N2 - 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 (N2 : O2 = 4 : 1) 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 ' 1021m%3 for plasma generated with N2/O2 shielding gas, 50% higher than that generated with N2 shielding.
AB - 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 (N2 : O2 = 4 : 1) 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 ' 1021m%3 for plasma generated with N2/O2 shielding gas, 50% higher than that generated with N2 shielding.
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U2 - 10.7567/JJAP.55.066101
DO - 10.7567/JJAP.55.066101
M3 - Article
AN - SCOPUS:84973444998
SN - 0021-4922
VL - 55
JO - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
JF - Japanese Journal of Applied Physics, Part 1: Regular Papers & Short Notes
IS - 6
M1 - 66101
ER -