CFRP truss for the CCAT 25m diameter submillimeter-wave telescope
- Woody, David P.
- Padin, Steve
- Sebring, Thomas
View in ORKG Publication date
August 2010 Publisher
Society of Photo-optical Instrumentation Engineers (SPIE)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