Considerations of thermal and mechanical stability for IOTA

Details Considerations of thermal and mechanical stability for IOTA Considerations of thermal and mechanical stability for IOTA

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990spie.1237..138c&link_type=abstract

IN: Amplitude and intensity spatial interferometry; Proceedings of the Meeting, Tucson, AZ, Feb. 14-16, 1990 (A91-30676 12-89).

Physics

Infrared Interferometers, Infrared Telescopes, Motion Stability, Thermal Stability, Very Long Base Interferometry, Power Spectra, Site Selection, Structural Vibration

Scientific paper

This paper considers in detail the questions of mechanical stability and thermal stability that were encountered in the course of the design of the Infrared Optical Telescope Array (IOTA) installed at the Smithsonian's Whipple Observatory on Mt. Hopkins. With respect to the mechanical stability, measurements of ground vibration showed that the ground is essentially benight at the IOTA site. To insure thermal stability, the telescope support points and the beam-relay path will be slightly below ground level and well-insulated. The telescopes will reside in insulated shelter-transporter structures which will be cooled during the day. The beam relay path will be in vacuum, so that seeing effects and longitudinal dispersion will be eliminated.

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