کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1690114 | 1011251 | 2008 | 4 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Sensitivity enhancement of laser absorption spectroscopy for atomic oxygen measurement in microwave air plasma
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سطوح، پوششها و فیلمها
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چکیده انگلیسی
A high sensitive laser absorption spectroscopy system has been developed for the detection of atomic oxygen in a microwave plasma. Firstly, the sensitivity of this system was evaluated by ring-down time measurement. The effective absorbing pass length was extended up to 640 times as long as that of the conventional laser absorption spectroscopy. Then, the system was applied to the air plasma diagnostics. As a result, the absorption signal from the meta-stable atomic oxygen at 777.19Â nm could be observed at the input enthalpy range from 0.93Â MJ/kg to 467Â MJ/kg. The detected minimum number density was 1.6Â ÃÂ 1011Â mâ3 with temperature of 388Â K, which correspond to the center fractional absorption of 1.4Â ÃÂ 10â2% in the LAS.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vacuum - Volume 83, Issue 1, 4 September 2008, Pages 21-24
Journal: Vacuum - Volume 83, Issue 1, 4 September 2008, Pages 21-24
نویسندگان
Makoto Matsui, Kimiya Komurasaki, Yoshihiro Arakawa,