KIT | KIT-Bibliothek | Impressum | Datenschutz

LED-based solar simulator to study photochemistry over a wide temperature range in the large simulation chamber AIDA

Vallon, Magdalena 1; Gao, Linyu ORCID iD icon 1; Jiang, Feng ORCID iD icon 1; Krumm, Bianca 1; Nadolny, Jens 1; Song, Junwei ORCID iD icon 1; Leisner, Thomas ORCID iD icon 2; Saathoff, Harald ORCID iD icon 2
1 Institut für Meteorologie und Klimaforschung (IMK), Karlsruher Institut für Technologie (KIT)
2 Institut für Meteorologie und Klimaforschung – Atmosphärische Aerosolforschung (IMK-AAF), Karlsruher Institut für Technologie (KIT)


A light source has been built at the AIDA (Aerosol Interactions and Dynamics in the Atmosphere) simulation chamber at the Karlsruhe Institute of Technology, simulating solar radiation at ground level. Instead of full spectra light sources, it uses a combination of LEDs with a narrow emission spectrum, resulting in a combined spectrum similar to the solar spectrum between 300 and 530 nm. The use of LEDs leads to an energy-efficient, robust and versatile illumination concept. The light source can be used over a wide temperature range down to −90 ∘C and is adjustable in intensity and spectral width as well as easily adjustable to new technological developments or scientific needs. Characterization of the illumination conditions shows a vertical intensity gradient in the chamber. The integral intensity corresponds to a NO₂ photolysis frequency j(NO₂) of ($1.58 \pm 0.21(1σ)) x 10^{-3} s^{−1}$ for temperatures between 213 and 295 K. At constant temperature, the light intensity is stable within ±1 %. While the emissions of the different LEDs change with temperature, they can be adjusted, and thus it is possible to adapt the spectrum for different temperatures. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000148849
Veröffentlicht am 20.07.2022
DOI: 10.5194/amt-15-1795-2022
Zitationen: 2
Web of Science
Zitationen: 2
Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung – Atmosphärische Aerosolforschung (IMK-AAF)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2022
Sprache Englisch
Identifikator ISSN: 1867-8548
KITopen-ID: 1000148849
HGF-Programm 12.11.12 (POF IV, LK 01) Atmospheric chemistry processes
Erschienen in Atmospheric Measurement Techniques
Verlag Copernicus Publications
Band 15
Heft 6
Seiten 1795–1810
Bemerkung zur Veröffentlichung Gefördert durch den KIT-Publikationsfonds
Vorab online veröffentlicht am 25.03.2022
Nachgewiesen in Dimensions
Web of Science
KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft
KITopen Landing Page