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Panel options for large precision radio telescopes

Woody, David and MacDonald, Dan and Bradford, Matt and Chamberlin, Richard and Dragovan, Mark and Goldsmith, Paul and Lamb, James and Radford, Simon and Zmuidzinas, Jonas (2008) Panel options for large precision radio telescopes. In: Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation. Proceedings of SPIE. No.7018. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 70180T. ISBN 9780819472281.

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The Cornell Caltech Atacama Telescope (CCAT) is a 25 m diameter telescope that will operate at wavelengths as short as 200 microns. CCAT will have active surface control to correct for gravitational and thermal distortions in the reflector support structure. The accuracy and stability of the reflector panels are critical to meeting the 10 micron HWFE (half wave front error) for the whole system. A system analysis based upon a versatile generic panel design has been developed and applied to numerous possible panel configurations. The error analysis includes the manufacturing errors plus the distortions from gravity, wind and thermal environment. The system performance as a function of panel size and construction material is presented. A compound panel approach is also described in which the reflecting surface is provided by tiles mounted on thermally stable and stiff sub-frames. This approach separates the function of providing an accurate reflecting surface from the requirement for a stable structure that is attached to the reflector support structure on three computer controlled actuators. The analysis indicates that there are several compound panel configurations that will easily meet the stringent CCAT requirements.

Item Type:Book Section
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Goldsmith, Paul0000-0002-6622-8396
Additional Information:© 2008 Society of Photo-optical Instrumentation Engineers (SPIE).
Subject Keywords:Radio telescopes, telescope panels, active reflector surface
Series Name:Proceedings of SPIE
Issue or Number:7018
Record Number:CaltechAUTHORS:20181112-091127818
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Official Citation:David Woody, Dan MacDonald, Matt Bradford, Richard Chamberlin, Mark Dragovan, Paul Goldsmith, James Lamb, Simon Radford, Jonas Zmuidzinas, "Panel options for large precision radio telescopes," Proc. SPIE 7018, Advanced Optical and Mechanical Technologies in Telescopes and Instrumentation, 70180T (23 July 2008)
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:90833
Deposited By: Tony Diaz
Deposited On:13 Nov 2018 19:13
Last Modified:16 Nov 2021 03:35

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