9 July 2008 Advanced Technology Solar Telescope lower enclosure thermal system
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The exterior of the Advanced Technology Solar Telescope enclosure requires cooling to eliminate so-called external dome seeing caused by solar loading during the observing day. This is achieved by way of coolant circulation through external plate coil panels, thereby maintaining the exterior surfaces of the enclosure at or just below ambient air temperature. As the distance from the optical path increases (e.g., on the surface of the lower enclosure), the stringency of the temperature requirement is diminished, thereby allowing a greater difference between the surface temperature and the ambient air temperature. This paper presents a comparison of the modeled performance of an active thermal control strategy on the lower enclosure to a passive strategy that employs concrete panels. A life-cycle cost analysis of each option is also presented.
© (2008) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
L. Phelps, L. Phelps, M. Warner, M. Warner, } "Advanced Technology Solar Telescope lower enclosure thermal system", Proc. SPIE 7017, Modeling, Systems Engineering, and Project Management for Astronomy III, 701719 (9 July 2008); doi: 10.1117/12.789340; https://doi.org/10.1117/12.789340

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