21 November 2007 Thermal performance of the ATST secondary mirror
Author Affiliations +
Proceedings Volume 6721, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes; 672102 (2007); doi: 10.1117/12.782674
Event: 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 2007, Chengdu, China
Abstract
The Advanced Technology Solar Telescope (ATST) has a 4.24m off-axis primary mirror designed to deliver diffractionlimited images of the sun. Its baseline secondary mirror (M2) design uses a 0.65m diameter Silicon Carbide mirror mounted kinematically by a bi-pod flexure mechanism at three equally spaced locations. Unlike other common telescopes, the ATST M2 is to be exposed to a significant solar heat loading. A thermal management system (TMS) will be developed to accommodate the solar loading and minimize "mirror seeing effect" by controlling the temperature difference between the M2 optical surface and the ambient air at the site. Thermo-elastic analyses for steady state thermal behaviors of the ATST secondary mirror was performed using finite element analysis by I-DEASTM and PCRINGETM for the optical analysis. We examined extensive heat transfer simulation cases and their results were discussed. The goal of this study is to establish thermal models by I-DEAS for an adequate thermal environment. These thermal models will be useful for estimating segment thermal responses. Current study assumes a few sample time dependent thermal loadings to synthesize the operational environment.
© (2007) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Myung K. Cho, Joe DeVries, Eric Hansen, "Thermal performance of the ATST secondary mirror", Proc. SPIE 6721, 3rd International Symposium on Advanced Optical Manufacturing and Testing Technologies: Large Mirrors and Telescopes, 672102 (21 November 2007); doi: 10.1117/12.782674; https://doi.org/10.1117/12.782674
PROCEEDINGS
11 PAGES


SHARE
KEYWORDS
Mirrors

Convection

Heat flux

Thermography

Thermal modeling

Finite element methods

Silicon carbide

RELATED CONTENT

Thermal analysis and seeing improvement of LAMOST enclosure
Proceedings of SPIE (September 24 2007)
Thermal modeling environment for TMT
Proceedings of SPIE (August 04 2010)
Thermal analysis of the TMT telescope structure
Proceedings of SPIE (August 04 2010)
Performance evaluations of the ATST secondary mirror
Proceedings of SPIE (September 17 2007)
Thermal modeling of the TMT Telescope
Proceedings of SPIE (November 10 2011)
Thermal performance prediction of the TMT optics
Proceedings of SPIE (July 16 2008)
Thermal analysis of a 4m honeycomb telescope primary mirror
Proceedings of SPIE (October 15 2012)

Back to Top