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Thermal modeling of the TMT Telescope

Cho, Myung and Corredor, Andrew and Vogiatzis, Konstantinos and Angeli, George (2011) Thermal modeling of the TMT Telescope. In: Integrated Modeling of Complex Optomechanical Systems. Proceedings of SPIE. No.8336. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 83360V. ISBN 9781510604322.

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Thermal modeling of the Thirty Meter Telescope (TMT) was conducted for evaluations of thermal performances by finite element (FE) and optical analysis tools. The thermal FE models consist of the telescope optical assembly systems, instruments, laser facility, control and electronic equipments, and telescope structural members. A three-consecutive-day thermal environment data was implemented for the thermal boundary created by Computational Fluid Dynamics (CFD) based on the environment conditions of the TMT site. Temporal and spatial temperature distributions of the optical assembly systems and the telescope structure were calculated under the environmental thermal conditions including air convections, conductions, heat flux loadings, and radiations. With the calculated temperature distributions, the thermo-elastic analysis was performed to predict thermal deformations of the telescope structure and the optical systems. The line of sight calculation was made using the thermally induced deformations of the optics and structures. Merit function routines (MFR) were utilized to calculate the Optical Path Difference (OPD) maps after repositioning the optics based on a best fit of M1 segment deformations. The goal of this thermal modeling is to integrate the mechanical and optical deformations in order to simulate the thermal effects with the TMT site environment data from CFD.

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Additional Information:© 2011 Society of Photo-Optical Instrumentation Engineers (SPIE). This research was carried out at the National Optical Astronomy Observatory, and was sponsored in part by the TMT. The authors gratefully acknowledge the support of the TMT partner institutions. They are the Association of Canadian Universities for Research in Astronomy (ACURA), the California Institute of Technology and the University of California. This work was supported as well by the Gordon and Betty Moore Foundation, the Canada Foundation for Innovation, the Ontario Ministry of Research and Innovation, the National Research Council of Canada, the Natural Sciences and Engineering Research Council of Canada, the British Columbia Knowledge Development Fund, the Association of Universities for Research in Astronomy (AURA) and the U.S. National Science Foundation.
Group:Thirty Meter Telescope
Funding AgencyGrant Number
TMT partner institutionsUNSPECIFIED
Association of Canadian Universities for Research in Astronomy (ACURA)UNSPECIFIED
University of CaliforniaUNSPECIFIED
Gordon and Betty Moore FoundationUNSPECIFIED
Canada Foundation for InnovationUNSPECIFIED
Ontario Ministry of Research and InnovationUNSPECIFIED
National Research Council of CanadaUNSPECIFIED
Natural Sciences and Engineering Research Council of Canada (NSERC)UNSPECIFIED
British Columbia Knowledge Development FundUNSPECIFIED
Association of Universities for Research in Astronomy (AURA)UNSPECIFIED
Subject Keywords:Telescope structure thermal analysis, TMT site environment data, thermal response, Merit function calculations, thermo-elastic analysis, TMT telescope
Series Name:Proceedings of SPIE
Issue or Number:8336
Record Number:CaltechAUTHORS:20190930-133756838
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Official Citation:Myung Cho, Andrew Corredor, Konstantinos Vogiatzis, and George Angeli "Thermal modeling of the TMT Telescope", Proc. SPIE 8336, Integrated Modeling of Complex Optomechanical Systems, 83360V (10 November 2011);
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:98957
Deposited By: George Porter
Deposited On:30 Sep 2019 22:39
Last Modified:03 Oct 2019 21:46

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