140 GHz microwave spectrometer for the detection of gaseous chemical species
Journal Article
·
· Int. J. Infrared Millimeter Waves; (United States)
A sensitive microwave spectrometer for the detection of gaseous pollutants and other molecular species is described. The spectrometer operates in the vicinity of 140 GHz and employs a Fabry-Perot resonator as a sample cell and superheterodyne detection for high sensitivity. The instrument is capable of detecting a minimum concentration of 210 ppb of SO/sub 2/ diluted in air with a 1 sec time constant. For H/sub 2/CO diluted in air, the minimum detectable concentration is 130 ppb.
- Research Organization:
- Lawrence Berkeley Lab., CA
- OSTI ID:
- 6100022
- Journal Information:
- Int. J. Infrared Millimeter Waves; (United States), Journal Name: Int. J. Infrared Millimeter Waves; (United States) Vol. 4:5; ISSN IJIWD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
440300 -- Miscellaneous Instruments-- (-1989)
47 OTHER INSTRUMENTATION
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
CHALCOGENIDES
DESIGN
DETECTION
FABRY-PEROT INTERFEROMETER
INTERFEROMETERS
MEASURING INSTRUMENTS
MICROWAVE SPECTRA
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
POLLUTANTS
SPECTRA
SPECTROMETERS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
47 OTHER INSTRUMENTATION
500200* -- Environment
Atmospheric-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
CHALCOGENIDES
DESIGN
DETECTION
FABRY-PEROT INTERFEROMETER
INTERFEROMETERS
MEASURING INSTRUMENTS
MICROWAVE SPECTRA
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE
POLLUTANTS
SPECTRA
SPECTROMETERS
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES