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

Kentaro Tomita, Keiichiro Urabe, Naoki Shirai, Yuta Sato, Safwat Hassaballa, Nima Bolouki, Munehiro Yoneda, Takahiro Shimizu, Kiichiro Uchino

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

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.

Original languageEnglish
JournalJapanese Journal of Applied Physics
Volume55
Issue number6
DOIs
Publication statusPublished - Jun 1 2016

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Shielding
Atmospheric pressure
Carrier concentration
Helium
shielding
atmospheric pressure
helium
Nitrogen
Plasmas
nitrogen
atmospheres
Oxygen
gas flow
Flow of gases
oxygen
core flow
Thomson scattering
Electron temperature
Gases
gases

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

Cite this

Electron density change of atmospheric-pressure plasmas in helium flow depending on the oxygen/nitrogen ratio of the surrounding atmosphere. / Tomita, Kentaro; Urabe, Keiichiro; Shirai, Naoki; Sato, Yuta; Hassaballa, Safwat; Bolouki, Nima; Yoneda, Munehiro; Shimizu, Takahiro; Uchino, Kiichiro.

In: Japanese Journal of Applied Physics, Vol. 55, No. 6, 01.06.2016.

Research output: Contribution to journalArticle

Tomita, Kentaro ; Urabe, Keiichiro ; Shirai, Naoki ; Sato, Yuta ; Hassaballa, Safwat ; Bolouki, Nima ; Yoneda, Munehiro ; Shimizu, Takahiro ; Uchino, Kiichiro. / Electron density change of atmospheric-pressure plasmas in helium flow depending on the oxygen/nitrogen ratio of the surrounding atmosphere. In: Japanese Journal of Applied Physics. 2016 ; Vol. 55, No. 6.
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AU - Hassaballa, Safwat

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