A study on REMPI as a measurement technique for highly rarefied gas flows (Analyses of experimental REMPI spectra in supersonic free molecular flows)

H. Mori, T. Ishida, Y. Aoki, T. Niimi

研究成果: Contribution to journalArticle査読

2 被引用数 (Scopus)

抄録

A technique for measurement of thermodynamic variables with high sensitivity is necessary for analyses of highly rarefied gas flows, gas-surface interaction, and so on. REMPI (Resonantly Enhanced Multiphoton Ionization) is a powerful optical tool because of its high sensitivity even in highly rarefied gas flows and its ability to measure nonequilibrium amongst internal (translational, vibrational, and rotational) energy modes. In this paper, a REMPI system is developed and REMPI spectra are measured on the center line of a free-molecular flow. The fundamental properties of the REMPI signal are also described. A method using a Boltzmann plot with the spectral lines of multiple branches is proposed, and the ratio of the electronic transition dipole moments in the two-photon Hönl-London factors for the O and P branches is determined.

本文言語英語
ページ(範囲)388-394
ページ数7
ジャーナルJSME International Journal, Series B: Fluids and Thermal Engineering
44
3
DOI
出版ステータス出版済み - 8 2001
外部発表はい

All Science Journal Classification (ASJC) codes

  • 機械工学
  • 物理化学および理論化学
  • 流体および伝熱

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