Measurements of molecular densities in low pressure discharge plasmas using laser Raman scattering

Yi Bing Song, Yuichiro Hirakawa, Kiichiro Uchino, Katsunori Muraoka, Tadanori Sakoda, Koji Yanagishita, Shizuo Nakamura

研究成果: ジャーナルへの寄稿学術誌査読

5 被引用数 (Scopus)

抄録

The possibility of using Raman scattering as a method of molecular density measurements in low pressure discharge plasmas has been investigated. Firstly, the detection limit of Raman signal was examined in low pressure air. It was shown that the Raman scattering from nitrogen molecules was detectable down to 0.06 Pa (particle density of 1.4 × 1019 m-3) when a photon counting detection system was used. The method was then applied to detect methane and its reaction products in an electron cyclotron resonance plasma operated at a pressure of 50 Pa. Densities of CH4, C2H2, C2H6 and H2 were absolutely determined using the calibrated data of the optical system. Also, it was clearly demonstrated that the gas composition in the discharge was dependent on gas flow rate. These experimental results showed the usefulness of the method for quantitative measurements of molecular densities in processing plasmas.

本文言語英語
ページ(範囲)5509-5513
ページ数5
ジャーナルJapanese Journal of Applied Physics
35
10
DOI
出版ステータス出版済み - 1996

!!!All Science Journal Classification (ASJC) codes

  • 工学一般
  • 物理学および天文学一般

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