![Erik Swietlicki. Foto.](/sv/sites/cec.lu.se.sv/files/styles/lu_personal_page_desktop/public/csm_erik_swietlicki_fe5aa181ab.jpg.webp?itok=92F4UOII)
Erik Swietlicki
Professor
![Erik Swietlicki. Foto.](/sv/sites/cec.lu.se.sv/files/styles/lu_personal_page_desktop/public/csm_erik_swietlicki_fe5aa181ab.jpg.webp?itok=92F4UOII)
Relating the single particle soot photometer (SP2) signal response to soot maturity
Författare
Summary, in English
Light absorbing carbonaceous aerosols produced from combustion span over a range of physicochemical properties. Soot is the most recognized species in this category and its formation process involves gradual maturation from amorphous young soot with a high hydrogen-to-carbon-ratio toward mature soot aggregates. In this work, the optical response of a single particle soot photometer (SP2) to electrical mobility size selected soot of different maturity produced by a mini-CAST soot generator is investigated. The results show that for soot of a specific mobility diameter, the laser-induced incandescence (LII) signal appears earlier and with a higher LII peak height for increasing soot maturity. The experimental observations are supported by simulations using a numerical model for the LII process. Furthermore, the effect of systematically varying the SP2 laser power on the detection of soot of different maturity using LII is explored. This work can be seen as a step toward the aim of using the SP2 instrument to identify soot particles of different maturity in the atmosphere.
Avdelning/ar
- Kärnfysik
- MERGE: ModElling the Regional and Global Earth system
- LTH profilområde: Aerosoler
- NanoLund: Centre for Nanoscience
- LTH profilområde: Nanovetenskap och halvledarteknologi
- LU profilområde: Ljus och material
- Förbränningsfysik
- Institutionen för naturgeografi och ekosystemvetenskap
- LTH profilområde: Energiomställningen
- Metalund
- Ergonomi och aerosolteknologi
- LTH profilområde: Avancerade ljuskällor
- LU profilområde: Naturbaserade framtidslösningar
- Centrum för Aerosolforskning (CAST)
- Centrum för miljö- och klimatvetenskap (CEC)
Publiceringsår
2024-04-25
Språk
Engelska
Publikation/Tidskrift/Serie
Aerosol Science and Technology
Dokumenttyp
Artikel i tidskrift
Förlag
Taylor & Francis
Ämne
- Atom and Molecular Physics and Optics
Aktiv
Epub
ISBN/ISSN/Övrigt
- ISSN: 1521-7388