Measurements of NO2 Concentration with Wide Dynamic Range Based on Laser Absorption Spectroscopy Using a Multi-Pass Optical Cell (Effects of Ambient Temperature Change at the Optical Cell)
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- OHTANI Nobuyoshi
- Department of Physics, School of Science, Tokai University
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- ENDO Masamori
- Department of Physics, School of Science, Tokai University
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- YAMAGUCHI Shigeru
- Department of Physics, School of Science, Tokai University
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- NANRI Kenzo
- Department of Physics, School of Science, Tokai University
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- FUJIOKA Tomoo
- Department of Physics, School of Science, Tokai University
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- MORITA Takakazu
- Department of Physics, School of Science, Tokai University
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- HORISAWA Hideyuki
- Department of Physics, School of Science, Tokai University
書誌事項
- タイトル別名
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- Measurements of NO<SUB>2</SUB> Concentration with Wide Dynamic Range Based on Laser Absorption Spectroscopy Using a Multi-Pass Optical Cell
- Effects of Ambient Temperature Change at the Optical Cell
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抄録
This paper discusses the precise measurement of NO2 concentrations in a sampled gas mixture using laser absorption spectroscopy. Pressurized NO2/N2 gas with known NO2 concentrations were used as sample gas mixtures. A frequency doubled Nd: YAG laser and mid-infrared (MIR) coherent light, using difference frequency generation techniques, were used to examine optical absorption by NO2. A relatively small change in temperature (ΔT-3K) at the optical multipass cell was found to vary the optical depth, particularly in a high concentration of NO2 mixture. This change is likely caused by a non-equilibrium dimerization effect between NO2 and N2O4 induced by the transient temperature non-uniformity of the gas mixture. Theoretical calculations and spectroscopic analysis suggest that careful consideration needs to be given to the stabilization of optical cell temperature, which is required to calibrate the laser absorption spectroscopic system for precise measurements of NO2 concentration.
収録刊行物
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- レーザー研究
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レーザー研究 34 (3), 246-250, 2006
一般社団法人 レーザー学会
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詳細情報 詳細情報について
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- CRID
- 1390282679625213952
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- NII論文ID
- 10017973456
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- NII書誌ID
- AN00255326
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- ISSN
- 13496603
- 03870200
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- NDL書誌ID
- 7891739
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可