Resonant photoacoustic spectrometer enhanced by multipass absorption for detecting atmospheric CH4 at the ppb-level
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DOI: 10.3389/fchem.2022.1021145
Abstract: A resonant photoacoustic spectrometer (PAS) was developed for detecting trace atmospheric CH4. The sensitivity of the PAS was significantly increased via a Herriott-type multipass cell with a beam pattern concentrated in the cavity. The effective… read more here.
Keywords: photoacoustic spectrometer; resonant photoacoustic; multipass; atmospheric ch4 ... See more keywords