Hydrogen atom temperature measured with wavelength-modulated laser absorption spectroscopy in large scale filament arc negative hydrogen ion source

2015 ◽  
Author(s):  
H. Nakano ◽  
S. Nishiyama ◽  
M. Goto ◽  
K. Tsumori ◽  
M. Kisaki ◽  
...  
Keyword(s):  
Hydrogen Atom ◽  
Absorption Spectroscopy ◽  
Large Scale ◽  
Ion Source ◽  
Hydrogen Ion ◽  
Laser Absorption Spectroscopy ◽  
Laser Absorption ◽  
Negative Hydrogen Ion ◽  
Atom Temperature

scholarly journals Laser absorption spectroscopy studies to characterize Cs oven performances for the negative ion source SPIDER

2019 ◽  
Vol 14 (12) ◽  
pp. C12011-C12011 ◽  
Author(s):  
M. Barbisan ◽  
S. Cristofaro ◽  
L. Zampieri ◽  
R. Pasqualotto ◽  
A. Rizzolo
Keyword(s):  
Absorption Spectroscopy ◽  
Ion Source ◽  
Negative Ion ◽  
Laser Absorption Spectroscopy ◽  
Laser Absorption ◽  
Spectroscopy Studies

Characterization of a Large-Scale Arcjet Facility Using Tunable Diode Laser Absorption Spectroscopy

AIAA Journal ◽  
2017 ◽  
Vol 55 (11) ◽  
pp. 3757-3766 ◽  
Author(s):  
Marcel Nations ◽  
Leyen S. Chang ◽  
Jay B. Jeffries ◽  
Ronald K. Hanson ◽  
Megan E. MacDonald ◽  
...  
Keyword(s):  
Diode Laser ◽  
Absorption Spectroscopy ◽  
Large Scale ◽  
Tunable Diode Laser ◽  
Laser Absorption Spectroscopy ◽  
Laser Absorption ◽  
Diode Laser Absorption

scholarly journals In-Situ Testing of Methane Emissions from Landfills Using Laser Absorption Spectroscopy

2021 ◽  
Vol 11 (5) ◽  
pp. 2117
Author(s):  
Haijie He ◽  
Shiyi Gao ◽  
Jie Hu ◽  
Tie Zhang ◽  
Tao Wu ◽  
...  
Keyword(s):  
Absorption Spectrum ◽  
Absorption Spectroscopy ◽  
Large Scale ◽  
Methane Concentration ◽  
Methane Emissions ◽  
Tunable Diode Laser ◽  
In Situ Testing ◽  
Laser Absorption Spectroscopy ◽  
Laser Absorption

Field monitoring of methane emissions from landfills is of great importance for both environmental concern and economic benefit. This study presents a highly effective method to measure methane emissions from landfills based on tunable diode laser absorption spectroscopy (TDLAS). Methane concentration is obtained by analyzing the absorption spectrum of the laser after passing through the landfill gas. The relationship between methane concentration and the optical signal was calibrated in the laboratory. As the methane concentration increased from 400 ppm to 5000 ppm, the absorption spectrum amplitude increased linearly from 0.0005 to 0.0046. In situ testing of methane emissions at a large-scale landfill in China demonstrated the accuracy of the TDLAS method. The methane concentrations in the well-covered areas were generally below 100 ppm. In the working area or the coverage area with holes, the methane concentration was about 700 ppm. The methane concentration was up to 1900 ppm, where the gas collection pipe is disconnected. Due to to the accuracy and simplicity, the TDLAS method is suitable to detect methane emissions on a large-scale from landfills.

INTRACAVITY LASER ABSORPTION SPECTROSCOPY OF NO2 AND CH4 COOLED IN A SLIT JET SUPERSONIC EXPANSION

1991 ◽  
Vol 01 (C7) ◽  
pp. C7-471-C7-476
Author(s):  
A. CAMPARGUE ◽  
M. CHENEVIER ◽  
A. DELON ◽  
R. JOST ◽  
F. STOECKEL
Keyword(s):  
Absorption Spectroscopy ◽  
Laser Absorption Spectroscopy ◽  
Supersonic Expansion ◽  
Laser Absorption ◽  
Intracavity Laser

Monitoring the Fractional Distillation Purification of Inorganic Hydrides by Diode Laser Absorption Spectroscopy

2020 ◽  
Vol 56 (12) ◽  
pp. 1284-1289
Author(s):  
Ya. Ya. Ponurovskii ◽  
D. B. Stavrovskii ◽  
Yu. P. Shapovalov ◽  
M. V. Spiridonov ◽  
A. S. Kuz’michev ◽  
...  
Keyword(s):  
Diode Laser ◽  
Absorption Spectroscopy ◽  
Fractional Distillation ◽  
Laser Absorption Spectroscopy ◽  
Laser Absorption ◽  
Diode Laser Absorption
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