A single-beam photothermal interferometer for in situ measurements of aerosol light absorption
dc.contributor.author | Visser, Bradley | |
dc.contributor.author | Röhrbein, Jannis | |
dc.contributor.author | Steigmeier, Peter | |
dc.contributor.author | Drinovec, Luka | |
dc.contributor.author | Močnik, Griša | |
dc.contributor.author | Weingartner, Ernest | |
dc.date.accessioned | 2024-01-19T06:53:08Z | |
dc.date.available | 2024-01-19T06:53:08Z | |
dc.date.issued | 2020 | |
dc.description.abstract | We have developed a novel single-beam photothermal interferometer and present here its application for the measurement of aerosol light absorption. The use of only a single laser beam allows for a compact optical set-up and significantly easier alignment compared to standard dual-beam photothermal interferometers, making it ideal for field measurements. Due to a unique configuration of the reference interferometer arm, light absorption by aerosols can be determined directly – even in the presence of light-absorbing gases. The instrument can be calibrated directly with light-absorbing gases, such as NO2, and can be used to calibrate other light absorption instruments. The detection limits (1σ) for absorption for 10 and 60 s averaging times were determined to be 14.6 and 7.4 Mm−1, respectively, which for a mass absorption cross section of 10 m2 g−1 leads to equivalent black carbon concentration detection limits of 1460 and 740 ng m−3, respectively. The detection limit could be reduced further by improvements to the isolation of the instrument and the signal detection and processing schemes employed. | |
dc.identifier.doi | 10.5194/amt-13-7097-2020 | |
dc.identifier.issn | 1867-8548 | |
dc.identifier.uri | https://irf.fhnw.ch/handle/11654/43695 | |
dc.identifier.uri | https://doi.org/10.26041/fhnw-7636 | |
dc.issue | 12 | |
dc.language.iso | en | |
dc.publisher | Copernicus | |
dc.relation.ispartof | Atmospheric Measurement Techniques | |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.spatial | Göttingen | |
dc.subject.ddc | 620 - Ingenieurwissenschaften und Maschinenbau | |
dc.title | A single-beam photothermal interferometer for in situ measurements of aerosol light absorption | |
dc.type | 01A - Beitrag in wissenschaftlicher Zeitschrift | |
dc.volume | 13 | |
dspace.entity.type | Publication | |
fhnw.InventedHere | Yes | |
fhnw.ReviewType | Anonymous ex ante peer review of a complete publication | |
fhnw.affiliation.hochschule | Hochschule für Technik | de_CH |
fhnw.affiliation.institut | lnstitut für Sensorik und Elektronik | de_CH |
fhnw.openAccessCategory | Diamond | |
fhnw.pagination | 7097-7111 | |
fhnw.publicationState | Published | |
relation.isAuthorOfPublication | b3941e6c-42c9-4e30-9d38-33d728123708 | |
relation.isAuthorOfPublication | 05dd9a19-7a24-4325-805a-2d121483b168 | |
relation.isAuthorOfPublication.latestForDiscovery | b3941e6c-42c9-4e30-9d38-33d728123708 |
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