Preparation of the helium-cooled German Infrared Laboratory (GIRL) interferometer for scientific use on Spacelab

Astronomy and Astrophysics – Astrophysics

Scientific paper

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Cryogenic Cooling, Infrared Spectroscopy, Michelson Interferometers, Spacelab Payloads, Calibrating, Infrared Telescopes, Product Development

Scientific paper

Preparation of a helium-cooled Michelson interferometer for high resolution IR spectroscopy of astronomical sources on the Spacelab telescope GIRL is summarized. Molecular parameters are provided as a basis for astrophysical observations. Critical problems in the adjustment and calibration of the sensitive interferometer were solved in the laboratory: a retroreflector was adjusted and tested, and a gas cell was built and tested for the calibration.

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