Optical design concept of the CMB-S4 large-aperture telescopes and cameras

Patricio A. Gallardo; Bradford Benson; John Carlstrom; Simon R. Dicker; Nick Emerson; Jon E. Gudmundsson; Richard Hills; Michele Limon; Jeff McMahon; Michael D. Niemack; Johanna M. Nagy; Stephen Padin; John Ruhl; Sara M. Simon

doi:10.1117/12.2626876

31 August 2022 Optical design concept of the CMB-S4 large-aperture telescopes and cameras

Patricio A. Gallardo, Bradford Benson, John Carlstrom, Simon R. Dicker, Nick Emerson, Jon E. Gudmundsson, Richard Hills, Michele Limon, Jeff McMahon, Michael D. Niemack, Johanna M. Nagy, Stephen Padin, John Ruhl, Sara M. Simon

Author Affiliations +

Proceedings Volume 12190, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI; 121900C (2022) https://doi.org/10.1117/12.2626876
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Abstract

CMB-S4 – the next-generation ground-based cosmic microwave background (CMB) experiment - will significantly advance the sensitivity of CMB measurements and improve our understanding of the origin and evolution of the universe. CMB-S4 will deploy large-aperture telescopes fielding hundreds of thousands of detectors at millimeter wavelengths. We present the baseline optical design concept of the large-aperture CMB-S4 telescopes, which consists of two optical configurations: (i) a new off-axis, three-mirror, free-form anastigmatic design and (ii) the existing coma-corrected crossed-Dragone design. We also present an overview of the optical configuration of the array of silicon optics cameras that will populate the focal plane with 85 diffraction-limited optics tubes covering up to 9 degrees of field of view, up to 1.1 mm in wavelength. We describe the computational optimization methods that were put in place to implement the families of designs described here and give a brief update on the current status of the design effort.

Conference Presentation

Citation Download Citation

Patricio A. Gallardo, Bradford Benson, John Carlstrom, Simon R. Dicker, Nick Emerson, Jon E. Gudmundsson, Richard Hills, Michele Limon, Jeff McMahon, Michael D. Niemack, Johanna M. Nagy, Stephen Padin, John Ruhl, and Sara M. Simon "Optical design concept of the CMB-S4 large-aperture telescopes and cameras", Proc. SPIE 12190, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy XI, 121900C (31 August 2022); https://doi.org/10.1117/12.2626876

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