21 April 1986 The Cologne Millimeter And Submillimeter-Wave Laboratory Spectrometer
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Proceedings Volume 0598, Instrumentation for Submillimeter Spectroscopy; (1986) https://doi.org/10.1117/12.952336
Event: 1985 International Technical Symposium/Europe, 1985, Cannes, France
Abstract
In this report the essential design goals of our millimeter and submillimeter-wave laboratory spectrometer are described. The source-modulation spectrometer is mainly used to provide rest frequencies of rotational transitions of astrophysically interesting molecules in the frequency range 68 - 520 GHz. As phase-locked radiation sources millimeter-wave reflex klystrons and tunable Gunn oscillators are employed. The absorption signals are detected with a newly constructed digital lock-in amplifier. The smallest peak-absorption coefficient that could be observed is 8.10-8 cm-1 at 150 GHz and 2.10-7 cm-1 at 225 GHz in a 400-cm free-space cell. For high-resolution spectroscopy saturation techniques have been applied to resolve overlapping line profiles. The spectrometer is also used for testing new waveguide and quasioptical components and complete subsystems for the Cologne 3-m radio telescope, now located at Gornergrat near Zermatt in the Swiss Alps.
© (1986) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Manfred Bester, Manfred Bester, Gunter Schwahn, Gunter Schwahn, Bernd Vowinkel, Bernd Vowinkel, Rudolf Schieder, Rudolf Schieder, Gisbert Winnewisser, Gisbert Winnewisser, } "The Cologne Millimeter And Submillimeter-Wave Laboratory Spectrometer", Proc. SPIE 0598, Instrumentation for Submillimeter Spectroscopy, (21 April 1986); doi: 10.1117/12.952336; https://doi.org/10.1117/12.952336
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