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Title: Thermal characteristics of a classical solar telescope primary mirror
Authors: Banyal, R. K
Ravindra, B
Keywords: Solar telescope mirror;Optical materials;Thermal effects;Finite element methods
Issue Date: Aug-2011
Publisher: Elsevier B.V.
Citation: New Astronomy, Vol. 16, No. 5, pp. 328-336
Abstract: We present a detailed thermal and structural analysis of a 2 m class solar telescope mirror which is subjected to a varying heat load at an observatory site. A 3-dimensional heat transfer model of the mirror takes into account the heating caused by a smooth and gradual increase of the solar flux during the day-time observations and cooling resulting from the exponentially decaying ambient temperature at night. The thermal and structural response of two competing materials for optical telescopes, namely Silicon Carbide – best known for excellent heat conductivity and Zerodur – preferred for its extremely low coefficient of thermal expansion, is investigated in detail. The insight gained from these simulations will provide a valuable input for devising an efficient and stable thermal control system for the primary mirror.
Description: Restricted Access
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Appears in Collections:IIAP Publications

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