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Proceedings Paper

Design of the Apache Point Observatory 3.5-m telescope: V. Telescope-enclosure thermal modeling
Author(s): Walter A. Siegmund
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Paper Abstract

A 3.5 m telescope is under construction at Apache Point near Alamogordo, New Mexico, at an elevation of 2800 m. A thermal model of a telescope enclosure is described. The model evaluates various strategies for minimizing local sources of image degradation (dome seeing). Direct and diffuse insolation, radiation to the sky, conduction, and the thermal inertia of the walls, interior air, roof, and structural steel are included. It is observed that highly reflective surface coatings reduce heat absorbed during the day, but are not very effective in reducing heat transfer in the telescope chamber at night, assuming that components with large heat capacities or thermal time constants are insulated.

Paper Details

Date Published: 1 July 1990
PDF: 8 pages
Proc. SPIE 1236, Advanced Technology Optical Telescopes IV, (1 July 1990); doi: 10.1117/12.19226
Show Author Affiliations
Walter A. Siegmund, Univ. of Washington (United States)

Published in SPIE Proceedings Vol. 1236:
Advanced Technology Optical Telescopes IV
Lawrence D. Barr, Editor(s)

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