Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.5708b&link_type=abstract
American Astronomical Society, AAS Meeting #211, #57.08; Bulletin of the American Astronomical Society, Vol. 39, p.831
Astronomy and Astrophysics
Astronomy
Scientific paper
The Magdalena Ridge Observatory Interferometer (ten telescope array) is being constructed atop the Magdalena Ridge at an altitude of 3,320 meters. The beam combiner down-select process for the near-infrared science instrument is dependent upon whether or not "fast switchyard” slides can be implemented. These slides should be able to re-direct a given unit telescope beam either into or out of the beam combiner optical path every few minutes, in a very repeatable fashion. To test the repeatability of the slides, the pitch, yaw, and optical path difference errors as a function of slide travel in both directions has been measured. Phase one tests set out to determine the long-term stability over the course of 24 hours, while phase two tests were to determine stability under normal operating conditions. The final results will help determine the repeatability of the slides and contribute to the selection of the science beam combiner design. Initial test results are reported here.
Block Erica
Jurgenson Colby A.
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