Atmospheric Trace Gas Sensing with Spectroscopic Methods
Wolfgang Jäger
PPM3’s mandate is to develop, and to explore the applicability of, spectroscopic methods for atmospheric trace gas sensing. The research team is investigating the frequency range from submillimetre-waves to the near infrared region for this purpose. a variety of sampling systems is being used, including open path configurations, reduced pressure cells, and pulsed molecular beam stations. Advantages and drawbacks of these sampling techniques will briefly be discussed. a mid-infrared lead salt diode laser spectrometer that includes the above mentioned sampling systems, will be described in detail. Test measurements of hydrogen sulfide, carbon dioxide, ammonia, and nitric oxide will be presented.