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Thermal characteristics of a classical solar telescope primary mirror  

Ravinder Kumar Banyal   Submitted: 2011-01-27 22:32

We present a detailed thermal and structural analysis of a 2m 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.

Authors: Ravinder K Banyal and B. Ravindra
Projects: None

Publication Status: Accepted for publication in New Astronomy
Last Modified: 2011-01-28 09:15
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Thermal characteristics of a classical solar telescope primary mirror

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