REMPIによる超希薄気体流計測に関する研究  超音速自由分子流におけるREMPIスペクトルの解析

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タイトル別名
  • A Study on REMPI as a Measurement Technique for Highly Rarefied Gas Flows. Analyses of Experimental REMPI Spectra in Supersonic Free Molecular Flows.
  • REMPI ニ ヨル チョウキハク キタイリュウ ケイソク ニ カンスル ケンキュウ チョウオンソク ジユウ ブンシリュウ ニ オケル REMPI スペクトル ノ カイセキ

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説明

A measuremnt technique of thermodynamic variables with high sensitivity is strongly demanded 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 ability to measure nonequilibrium among internal (translational, vibrational, and rotational) energy. In this paper, the MEMPI system is constructed and the REMPI spectra are measured at the center line of a free molecular flow. The fundamental properties of REMPI signal are also described. A method of Boltzmann plot using the spectral lines of different branches is proposed, determining electronic transition dipole moments in Honl-London factors.

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