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Proceedings Paper

A 380 GHz SIS heterodyne spectrometer for "pronaos" (balloon borne experiment for submillfineter radioastronomy)
Author(s): G. Beaudin
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Paper Abstract

To prepare the space programs on astrophysics, the development of a balloon-borne observatory (PRONAOS) ,including a 2 metre telescope associated with a submillimetre heterodyne spectrometer for radioastronomy,has been supported by the french space agency (CNES).The receiver includes a SIS mixer using Nb/AlOx/Nb tunnel junctions operating at 4K, a 6 GHz IF low-noisecooled preamplifier, a LO quasi-opticaly injected with a phase locked Gunn oscillator and two cascadedfrequency multipliers. Noise temperature as low as 300 K has been obtained ; less than 200 K is expected. AnAcousto-Optical Spectrometer (AOS) is used for high resolution (vidv--.106) spectral analysis. This instrument willbe used to simultaneously detect the 368 GHz 02 and the 380 GHz H2O lines in the interstellar medium.Observations in this part of the spectrum requires low atmospheric water vapor and oxygen molecule emission,so that the telescope will fly under a 1 000 000m3 balloon at an altitude of ,---- 37 km.

Paper Details

Date Published: 30 November 2017
PDF: 2 pages
Proc. SPIE 2104, 18th International Conference on Infrared and Millimeter Waves, 21048J (30 November 2017); doi: 10.1117/12.2298739
Show Author Affiliations
G. Beaudin, Observatoire de Paris à Meudon (France)

Published in SPIE Proceedings Vol. 2104:
18th International Conference on Infrared and Millimeter Waves
James R. Birch; Terence J. Parker, Editor(s)

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