東京大学大学院
東京大学新領域
東京大学工学部
Department of Aerospace and Astronautics, The University of Tokyo
Department of Advanced Energy, The University of Tokyo
抄録
Cavity enhanced absorption spectroscopy system using a diode laser was developed to increase the sensitivity of a conventional laser absorption spectroscopy method. Firstly, for comparison, single path laser absorption spectroscopy was applied to investigate target plasma torch flow using an absorption line of ArI 842.46nm. The measured center fractional absorption, temperature and number density were 16.4%, 10400K and 9.9x1017m-3, respectively. Next, the novel system was applied to the same flow to evaluate its sensitivity. As a result, very strong absorption, whose center fractional absorption was close to 100%, was observed. From the whole absorption profile, it was found that the sensitivity of this system was enhanced one hundred times as high as that of the conventional method.
雑誌名
プラズマ応用科学
巻
13
ページ
75 - 80
発行年
2005
ISSN
13403214
フォーマット
application/pdf
著者版フラグ
author
日本十進分類法
420
出版者
プラズマ応用科学会
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高反射ミラーによるレーザー吸収分光法の感度向上
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