Active thermal control for the 1.8-m primary mirror of the solar telescope CLST

Yangyi Liu; Naiting Gu; Cheng Li; Yuntao Cheng; Benxi Yao; Zhiyong Wang; Changhui Rao

doi:10.1117/12.2231854

27 July 2016 Active thermal control for the 1.8-m primary mirror of the solar telescope CLST

Yangyi Liu, Naiting Gu, Cheng Li, Yuntao Cheng, Benxi Yao, Zhiyong Wang, Changhui Rao

Proceedings Volume 9906, Ground-based and Airborne Telescopes VI; 99061C (2016) https://doi.org/10.1117/12.2231854
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

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.

Citation Download Citation

Yangyi Liu, Naiting Gu, Cheng Li, Yuntao Cheng, Benxi Yao, Zhiyong Wang, and 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); https://doi.org/10.1117/12.2231854

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