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Cold optical design for the large aperture Simons' Observatory telescope
Author(s): S. R. Dicker; P. A. Gallardo; J. E. Gudmudsson; P. D. Mauskopf; A. Ali; P. C. Ashton; G. Coppi; M. J. Devlin; N. Galitzki; S. P. Ho; C. A. Hill; J. Hubmayr; B. Keating; A. T. Lee; M. Limon; F. Matsuda; J. McMahon; M. D. Niemack; J. L. Orlowski-Scherer; L. Piccirillo; M. Salatino; S. M. Simon; S. T. Staggs; R. Thornton; J. N. Ullom; E. M. Vavagiakis; E. J. Wollack; Z. Xu; N. Zhu
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Paper Abstract

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.

Paper Details

Date Published: 6 July 2018
PDF: 13 pages
Proc. SPIE 10700, Ground-based and Airborne Telescopes VII, 107003E (6 July 2018); doi: 10.1117/12.2313444
Show Author Affiliations
S. R. Dicker, Univ. of Pennsylvania (United States)
P. A. Gallardo, Cornell Univ. (United States)
J. E. Gudmudsson, Stockholm Univ. (Sweden)
P. D. Mauskopf, Arizona State Univ. (United States)
A. Ali, Univ. of California, Berkeley (United States)
P. C. Ashton, Univ. of California, Berkeley (United States)
G. Coppi, Univ. of Pennsylvania (United States)
M. J. Devlin, Univ. of Pennsylvania (United States)
N. Galitzki, Univ. of California, San Diego (United States)
S. P. Ho, Princeton Univ. (United States)
C. A. Hill, Univ. of California, Berkeley (United States)
J. Hubmayr, NIST (United States)
B. Keating, Univ. of California, San Diego (United States)
A. T. Lee, Univ. of California, Berkeley (United States)
M. Limon, Univ. of Pennsylvania (United States)
F. Matsuda, The Univ. of Tokyo (Japan)
J. McMahon, Univ. of Michigan (United States)
M. D. Niemack, Cornell Univ. (United States)
J. L. Orlowski-Scherer, Univ. of Pennsylvania (United States)
L. Piccirillo, The Univ. of Manchester (United Kingdom)
M. Salatino, AstroParticle and Cosmology Lab., Paris Diderot Univ. (France)
S. M. Simon, Univ. of Michigan (United States)
S. T. Staggs, Princeton Univ. (United States)
R. Thornton, West Chester Univ. of Pennsylvania (United States)
J. N. Ullom, NIST (United States)
E. M. Vavagiakis, Cornell Univ. (United States)
E. J. Wollack, NASA Goddard Space Flight Ctr. (United States)
Z. Xu, Univ. of Pennsylvania (United States)
N. Zhu, Univ. of Pennsylvania (United States)

Published in SPIE Proceedings Vol. 10700:
Ground-based and Airborne Telescopes VII
Heather K. Marshall; Jason Spyromilio; Roberto Gilmozzi, Editor(s)

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