Dresden 2020 – wissenschaftliches Programm
Die DPG-Frühjahrstagung in Dresden musste abgesagt werden! Lesen Sie mehr ...
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
UP: Fachverband Umweltphysik
UP 7: Measurement Techniques
UP 7.2: Vortrag
Donnerstag, 19. März 2020, 10:20–10:40, HSZ 105
Fabry-Perot interferometer correlation spectroscopy - A novel technique for the imaging of atmospheric trace gases — •Christopher Fuchs1, Jonas Kuhn1,2, Nicole Bobrowski1,2, and Ulrich Platt1,2 — 1Institute of Environmental Physics, Heidelberg University, Germany — 2Max Planck Institute for Chemistry, Mainz, Germany
Imaging of trace gases by optical remote sensing can provide insights in the dynamics of physical and chemical processes within the atmosphere. However, dispersive techniques are not able to resolve many processes on their intrinsic spatial and temporal scale, e.g. Imaging DOAS. Non-dispersive imaging techniques, e.g. SO2 cameras, reach high spatial and temporal resolution, but due to their strongly restricted spectral information are limited to SO2 only.
We introduce a novel imaging technique for atmospheric trace gases, based on the application of a Fabry-Perot interferometer (FPI). The increase of spectral information for the detection of trace gases is reducing cross sensitivities and allowing for the application to other species e.g., HCHO, BrO.
We present the first measurement for SO2 with an imaging Fabry-Perot correlation spectroscopy (IFPICS) instrument with a sensitivity of 7.9 × 10−20 cm2 molec−1. Additionally, we will present sensitivity studies of further trace gases, which have been already performed in our laboratory, and resulted in prospected detection limits of < 5 × 1015 molec cm−2 s−1/2 for HCHO and < 1014 molec cm−2 s−1/2 for BrO.