キャビティエンハンスト吸収分光法によるプラズマトーチ気流診断

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タイトル別名
  • Diagnostics of Plasma Torch Flow by Cavity Enhanced Absorption Spectroscopy
  • キャビティ エンハンスト キュウシュウ ブンコウホウ ニ ヨル プラズマ トーチ キリュウ シンダン

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抄録

The cavity enhanced absorption spectroscopy using a tunable diode laser was applied to plasma torch diagnostics. Using cavity mirrors with 99.95% reflectance, the sensitivity was successfully enhanced by three orders of magnitude compared with the conventional single-pass laser absorption spectroscopy. With a 0.6m distance cavity, the spatial resolution of less than 1mm was achieved. The deviation of deduced temperature was below 5% when ten profiles were averaged. Total amount of data acquisition needed for a given plume section was estimated at 100M Sample. The torch plume was found in nonequilibrium electronic excitation state.

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