Cold optical design for the Large Aperture Simons Observatory telescope

The Simons Observatory will consist of a single large (6 m diameter) telescope and a number of smaller (0.5 m diameter) refracting telescopes designed to measure the polarization of the Cosmic Microwave Background to unprecedented accuracy. The large aperture telescope is the same design as the CCAT...

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Bibliographic Details
Published in:arXiv.org 2019-12
Main Authors: Dicker, S R, Gallardo, P A, Gudmundsson, J E, Mauskopf, P D, Ali, A, Ashton, P C, Coppi, G, Devlin, M J, Galitzki, N, Ho, S P, Hill, C A, Hubmayr, J, Keating, B, Lee, A T, Limon, M, Matsuda, F, McMahon, J, Niemack, M D, Orlowski-Scherer, J L, Piccirillo, L, Salatino, M, Simon, S M, Staggs, S T, Thornton, R, Ullom, J N, Vavagiakis, E M, Wollack, E J, Z Xu, Zhu, N, The Simons Observatory Collaboration
Format: Article
Language:English
Subjects:
Apertures
Big Bang theory
Cosmic microwave background
Design modifications
Field of view
Observatories
Optical design
Refracting telescopes
Telescopes
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Summary:The Simons Observatory will consist of a single large (6 m diameter) telescope and a number of smaller (0.5 m diameter) refracting telescopes designed to measure the polarization of the Cosmic Microwave Background to unprecedented accuracy. The large aperture telescope is the same design as the CCAT-prime telescope, a modified Crossed Dragone design with a field-of-view of over 7.8 degrees diameter at 90 GHz. This paper presents an overview of the cold reimaging optics for this telescope and what drove our choice of 350-400 mm diameter silicon lenses in a 2.4 m cryostat over other possibilities. We will also consider the future expandability of this design to CMB Stage-4 and beyond.
ISSN:2331-8422