27 July 2016 Active thermal control for the 1.8-m primary mirror of the solar telescope CLST
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Abstract
The 1.8-m primary mirror of solar telescope is heated by the solar radiation and introduce harmful mirror seeing degrading the imaging quality. For the Chinese Large Solar Telescope (CLST), the thermal requirement based on the quantitative evaluation on mirror seeing effect shows that the temperature rise on mirror surface should be within 1 kelvin. To meet the requirement, an active thermal control system design for the CLST primary mirror is proposed, and realized on the subscale prototype of the CLST. The experimental results show that the temperature on the mirror surface is well controlled. The average and maximum thermal controlled error are less than 0.3 and 0.7 kelvins respectively, which completely meets the requirements.
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Yangyi Liu, Yangyi Liu, Naiting Gu, Naiting Gu, Cheng Li, Cheng Li, Yuntao Cheng, Yuntao Cheng, Benxi Yao, Benxi Yao, Zhiyong Wang, Zhiyong Wang, Changhui Rao, Changhui Rao, } "Active thermal control for the 1.8-m primary mirror of the solar telescope CLST", Proc. SPIE 9906, Ground-based and Airborne Telescopes VI, 99061C (27 July 2016); doi: 10.1117/12.2231854; https://doi.org/10.1117/12.2231854
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