Field measurements of volcanic gases using tunable diode laser based mid-infrared and Fourier transform infrared spectrometers
| Autor: | Frank K. Tittel, Robert F. Curl, Miklós Erdélyi, Clive Oppenheimer, D. Richter, Mike Burton, Hayley J. Duffell |
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| Rok vydání: | 2002 |
| Předmět: |
event.disaster_type
Materials science Absorption spectroscopy Mechanical Engineering Analytical chemistry Infrared spectroscopy Laser Atomic and Molecular Physics and Optics Fourier transform spectroscopy Electronic Optical and Magnetic Materials law.invention Volcanic Gases symbols.namesake Fourier transform law symbols event Electrical and Electronic Engineering Spectroscopy Tunable laser |
| Zdroj: | Optics and Lasers in Engineering. 37:171-186 |
| ISSN: | 0143-8166 |
| DOI: | 10.1016/s0143-8166(01)00094-x |
| Popis: | The first field measurements of volcanic gases using mid-IR difference frequency laser spectroscopy are reported. The results were obtained at the summit crater of Masaya volcano, Nicaragua, with the gases being drawn into a multi-pass cell and measured at reduced pressure. Automated sensitive and selective detection of CO2 ,S O 2 ,H 35,37 Cl, H2O, and CH4 was achieved. Simultaneous measurements obtained with open-path Fourier transform spectroscopy provide a useful comparison of the two optical techniques. We also consider the potential measurement of CO2 isotopic ratios in volcanic gases using laser-based spectroscopy. r 2002 Elsevier Science Ltd. All rights reserved. |
| Databáze: | OpenAIRE |
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