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dc.contributor.authorHeinrich, Robert
dc.contributor.authorPopescu, Alexandru
dc.contributor.authorStzoda, Rainer
dc.contributor.authorHangauer, Andreas
dc.contributor.authorHöfling, Sven
dc.date.accessioned2019-04-01T16:30:01Z
dc.date.available2019-04-01T16:30:01Z
dc.date.issued2019-04-07
dc.identifier.citationHeinrich , R , Popescu , A , Stzoda , R , Hangauer , A & Höfling , S 2019 , ' High resolution quantitative multi-species hydrocarbon gas sensing with a cw external cavity quantum cascade laser based spectrometer in the 6-11 μm range ' , Journal of Applied Physics , vol. 125 , no. 13 , 134501 . https://doi.org/10.1063/1.5082168en
dc.identifier.issn0021-8979
dc.identifier.otherPURE: 258252768
dc.identifier.otherPURE UUID: bdcc7eb1-3221-4df1-b23e-4a7095cc3049
dc.identifier.otherScopus: 85063815120
dc.identifier.otherWOS: 000463657500010
dc.identifier.urihttp://hdl.handle.net/10023/17416
dc.descriptionFunding: European Union Horizon 2020 research and innovation program under Grant Agreement No. 636930 (iCspec).en
dc.description.abstractWe report multi-species spectroscopy of hydrocarbons with a continuous wave external-cavity quantum cascade laser based spectrometer providing tunability from 6 to 11μm to measure direct absorption spectra of the first 7 alkanes and their mixtures. The gas spectra were acquired in the range from 1440 to 1480cm−1 at a reduced pressure of 50 mbar and at a temperature of 323 K. By linearization of the measured wavelengths with a custom-made highly temperature stable air spaced etalon, a high spectral accuracy of ±0.001cm−1 is achieved for the whole spectral range. The simultaneous high resolution of 0.001cm−1 yields spectra of unprecedented richness of detail for the heavier alkanes (C3–C5) and allows the discrimination of narrow spectral features for the lighter ones (C1–C2). Thereby, the measured spectra reveal the influences of collisional broadening effects among the measured species. Quantitative spectroscopic multi-species gas sensing relies on the comprehension of the extent of spectral broadening. Studying the spectral broadening in combination with highly accurate reference spectra is mandatory for highly sensitive and specific multi-species gas analyzers. The quantitative results that can be obtained with our approach are presented for an exemplary calibrated mixture of all 7 components and reveal an absolute accuracy below 0.5 vol. % for the determination of the mole fraction of each gas.
dc.format.extent11
dc.language.isoeng
dc.relation.ispartofJournal of Applied Physicsen
dc.rights© 2019, the Author(s). Published under license. This work has been made available online in accordance with the publisher's policies. This is the author created accepted version manuscript following peer review and as such may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1063/1.5082168en
dc.rights© 2019, the Author(s). Published under license. This work has been made available online in accordance with the publisher's policies. This is the author created accepted version manuscript following peer review and as such may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1063/1.5082168en
dc.subjectQC Physicsen
dc.subjectTK Electrical engineering. Electronics Nuclear engineeringen
dc.subjectNDASen
dc.subject.lccQCen
dc.subject.lccTKen
dc.titleHigh resolution quantitative multi-species hydrocarbon gas sensing with a cw external cavity quantum cascade laser based spectrometer in the 6-11 μm rangeen
dc.typeJournal articleen
dc.description.versionPostprinten
dc.description.versionPostprinten
dc.contributor.institutionUniversity of St Andrews.Condensed Matter Physicsen
dc.contributor.institutionUniversity of St Andrews.School of Physics and Astronomyen
dc.identifier.doihttps://doi.org/10.1063/1.5082168
dc.description.statusPeer revieweden


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