Articles | Volume 15, issue 4
Atmos. Meas. Tech., 15, 945–964, 2022
https://doi.org/10.5194/amt-15-945-2022

Special issue: Simulation chambers as tools in atmospheric research (AMT/ACP/GMD...

Atmos. Meas. Tech., 15, 945–964, 2022
https://doi.org/10.5194/amt-15-945-2022
Research article
23 Feb 2022
Research article | 23 Feb 2022

Detection of nitrous acid in the atmospheric simulation chamber SAPHIR using open-path incoherent broadband cavity-enhanced absorption spectroscopy and extractive long-path absorption photometry

Sophie Dixneuf et al.

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Short summary
Atmospheric chambers, like SAPHIR in Jülich (Germany), are used to experimentally simulate specific atmospheric scenarios to improve our understanding of the complex chemical reactions occurring in our atmospheres. These facilities hence require cutting-edge gas-sensing capabilities to detect trace gases at the lowest level and in a short time. One important trace gas is HONO, for which we custom-built an optical sensing setup, capable of detecting one HONO molecule in ~40 billion in 1 min.