Primary mirror panels of the Millimetron Space Observatory

Evgeny S. Golubev; Elena K. Kotsur; Mikhail Yu. Arkhipov; Andrey V. Smirnov; Andrey O. Lyakhovec; Victor N. Pyshnov

doi:10.1117/12.2562838

13 December 2020 Primary mirror panels of the Millimetron Space Observatory

Evgeny S. Golubev, Elena K. Kotsur, Mikhail Yu. Arkhipov, Andrey V. Smirnov, Andrey O. Lyakhovec, Victor N. Pyshnov

Proceedings Volume 11451, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV; 114510K (2020) https://doi.org/10.1117/12.2562838
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Abstract

Millimetron Space Observatory is a 10-m aperture space telescope that will operate from millimeter to far-infrared wavelength range. To achieve an unprecedented sensitivity, the telescope with segmented primary mirror will be cooled down to a temperature less than 10K and the surface accuracy better than 10 μm will be provided. New materials and stateof- the-art technologies have been brought together to create the high precision and thermally stable primary mirror panels combining increased rigidity and low areal density (less than 9 kg/m²). Carbon fiber reinforced plastic was chosen as a material for the panels. It provides low coefficient of thermal expansion, high stiffness to weight ratio, and manufacturing flexibility. Nevertheless, it has significant drawbacks such as anisotropy, variation of mechanical properties of the ply, and microcracking that raise difficulties in achieving highly accurate and thermally stable design. The paper presents the design of the primary mirror panels and focuses on the most challenging steps of their development process. The main features of manufacturing based on replica technique and results of the numerical and experimental analyses are also discussed.

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Citation Download Citation

Evgeny S. Golubev, Elena K. Kotsur, Mikhail Yu. Arkhipov, Andrey V. Smirnov, Andrey O. Lyakhovec, and Victor N. Pyshnov "Primary mirror panels of the Millimetron Space Observatory", Proc. SPIE 11451, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation IV, 114510K (13 December 2020); https://doi.org/10.1117/12.2562838

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