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CCAT optics

Padin, S. and Hollister, M. and Radford, S. and Sayers, J. and Woody, D. P. and Zmuidzinas, J. and Cortes-Medellin, G. and Sebring, T. and Stacey, G. (2010) CCAT optics. In: Ground-based and Airborne Telescopes III. Proceedings of SPIE. No.7733. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, Art. No. 77334Y. ISBN 978-0-81948-223-5.

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CCAT will be a 25 m diameter, submillimeter-wave telescope. It will be located on Cerro Chajnantor in the Atacama Desert, near ALMA. CCAT will be an on-axis, Ritchey-Chrétien design with an active primary to compensate gravitational deformations. The primary mirror will have 162 segments, each with ~0.5 × 0.5 m reflecting tiles on a ~2×2 m, insulated, carbon-fiber-reinforced-plastic subframe. CCAT will be equipped with wide-field, multi-color cameras and multi-object spectrometers at its Nasmyth foci. These instruments will cover all the atmospheric windows in the λ = 0.2 to 2 mm range. The field of view at the Nasmyth foci will be 1°, so CCAT will be able to support cameras with a few ×10^4 detectors (spaced 2 beamwidths) at λ = 1 mm to a few ×10^6 detectors (spaced half a beamwidth) at λ = 350 μm. Single instruments of this size are probably impractical, so we will break the field into smaller pieces, with a separate sub-field camera for each piece. The cameras will require some relay optics to couple the fairly slow beam from the telescope to the detectors. A reflective relay for 1° field of view is too large to be practical, so we plan to use a compact, cold, refractive relay in each sub-field camera.

Item Type:Book Section
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Sayers, J.0000-0002-8213-3784
Additional Information:© 2010 SPIE. This work was supported by the John B. and Nelly Kilroy Foundation.
Funding AgencyGrant Number
John B. and Nelly Kilroy FoundationUNSPECIFIED
Subject Keywords:Radio astronomy; submillimeter telescopes
Series Name:Proceedings of SPIE
Issue or Number:7733
Record Number:CaltechAUTHORS:20110310-151542282
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Official Citation:S. Padin ; M. Hollister ; S. Radford ; J. Sayers ; D. Woody ; J. Zmuidzinas ; G. Cortes-Medellin ; T. Sebring and G. Stacey "CCAT optics", Proc. SPIE 7733, Ground-based and Airborne Telescopes III, 77334Y (August 05, 2010); doi:10.1117/12.856489;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:22816
Deposited By: Jason Perez
Deposited On:15 Mar 2011 15:19
Last Modified:20 Nov 2020 19:50

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