CFRP truss for the CCAT 25m diameter submillimeter-wave telescope

David P. Woody; Stephen Padin; Thomas Sebring

doi:10.1117/12.856498

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5 August 2010 CFRP truss for the CCAT 25m diameter submillimeter-wave telescope

David P. Woody, Stephen Padin, Thomas Sebring

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Proceedings Volume 7733, Ground-based and Airborne Telescopes III; 77332B (2010) https://doi.org/10.1117/12.856498
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

Abstract

CCAT will be a 25 m diameter submillimeter-wave telescope that will operate inside a dome located on Cerro Chajnantor in the Atacama Desert. The telescope must have high aperture efficiency at a wavelength of 350 microns and good performance out to a wavelength of 200 microns. A conceptual design for a carbon fiber reinforced plastic (CFRP) truss and primary reflector support truss has been developed. This design yields a telescope with a net ½ wave front error of <10 microns using a lookup table to adjust the segment actuators to compensate for gravitational deflections. Minor corrections may be required to compensate for the expected 20 C temperature excursions. These can be handled using a coarse lookup table.

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David P. Woody, Stephen Padin, and Thomas Sebring "CFRP truss for the CCAT 25m diameter submillimeter-wave telescope", Proc. SPIE 7733, Ground-based and Airborne Telescopes III, 77332B (5 August 2010); https://doi.org/10.1117/12.856498

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