Quantum cascade laser absorption spectroscopy with the amplitude-to-time conversion technique for atmospheric-pressure plasmas

Yumii, Takayoshi; Kimura, Noriaki; Hamaguchi, Satoshi

Journal of Applied Physics, 2013, 113(21), 213101

Number of Access:408（2025-08-28 17:12 Counts）

Identifier to cite or link to this item: https://hdl.handle.net/11094/78468

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Title
Quantum cascade laser absorption spectroscopy with the amplitude-to-time conversion technique for atmospheric-pressure plasmas
Creator
CreatorName
Yumii, Takayoshi
CreatorName
Kimura, Noriaki
NRID
1000060301826 1000060301826
ORCID
0000-0001-6580-8797 0000-0001-6580-8797
researchmap permalink
satoshi_hamaguchi satoshi_hamaguchi
Scopus Author ID
55220082400 55220082400
CreatorName
Hamaguchi, Satoshi
Description
Yumii, T., Kimura, N., and Hamaguchi, S., Journal of Applied Physics 113(21), 213101 (2013) http://doi.org/10.1063/1.4808261
Abstract
The NO2 concentration, i.e., density, in a small plasma of a nitrogen oxide (NOx) treatment reactor has been measured by highly sensitive laser absorption spectroscopy. The absorption spectroscopy uses a single path of a quantum cascade laser beam passing through a plasma whose dimension is about 1 cm. The high sensitivity of spectroscopy is achieved by the amplitude-to-time conversion technique. Although the plasma reactor is designed to convert NO in the input gas to NO2, it has been demonstrated by this highly sensitive absorption spectroscopy that NO2 in a simulated exhaust gas that enters the reactor is decomposed by the plasma first and then NO 2 is formed again, possibly more than it was decomposed, through a series of gas-phase reactions by the time the gas exits the reactor. The observation is consistent with that of an earlier study on NO decomposition by the same type of a plasma reactor [T. Yumii, J. Phys. D 46, 135202 (2013)], in which a high concentration of NO2 was observed at the exit of the reactor. © 2013 AIP Publishing LLC.
Publisher
American Institute of Physics
Source Title
Journal of Applied Physics
Volume (Issue)
113(21)
Page
213101
Date of Issued
2013-06-07
Language
English
Handle URL
https://hdl.handle.net/11094/78468
PISSN
00218979
NCID
AA00693547
Relation.isIdenticalTo
DOI (Publisher Version)
https://doi.org/10.1063/1.4808261
Access Rights
open access
CopyRight
This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in Journal of Applied Physics 113, 213101 (2013) and may be found at https://doi.org/10.1063/1.4808261.
oaire:version
Version of Record
Category
学術雑誌論文 Journal Article