Construction and use of a standard source for far infrared astronomy experiments

Details Construction and use of a standard source for far infrared astronomy experiments Construction and use of a standard source for far infrared astronomy experiments

Feb 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981stin...8216024j&link_type=abstract

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Astronomy and Astrophysics

Astronomy

Astronomical Spectroscopy, Calibrating, Far Infrared Radiation, Standardization, Absorption Spectroscopy, Black Body Radiation, Bolometers, Cryogenic Equipment, Numerical Control

Scientific paper

A flexible standard radiation source suited for far infrared astronomy experiments is analyzed. The source makes use of two black bodies built in a liquid nitrogen cooled dewar. One of them can be heated to a temperature between 80 and 400K, the other, the reference source, has the temperature of the nitrogen bath. The radiation flux is modulated by numerical control while the exit openings of the black bodies are imaged on the standard source outlet pupil, outside the dewar. The modulated radiation intensity can be adjusted and superposed on the constant reference intensity. A helium cooled Ge-Ga bolometer was calibrated and atmospheric absorption measurements were conducted.

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