Kavli Affiliate: Bradford Benson
| First 5 Authors: Patricio A. Gallardo, Roberto Puddu, Kathleen Harrington, Bradford Benson, John Carlstrom
| Summary:
CMB-S4, the next-generation ground-based cosmic microwave background (CMB)
observatory, will provide detailed maps of the CMB at millimeter wavelengths to
dramatically advance our understanding of the origin and evolution of the
universe. CMB-S4 will deploy large and small aperture telescopes with hundreds
of thousands of detectors to observe the CMB at arcminute and degree
resolutions at millimeter wavelengths. Inflationary science benefits from a
deep delensing survey at arcminute resolutions capable of observing a large
field of view at millimeter wavelengths. This kind of survey acts as a
complement to a degree angular resolution survey. The delensing survey requires
a nearly uniform distribution of cameras per frequency band across the focal
plane. We present a large-throughput, large-aperture (5-meter diameter)
freeform three-mirror anastigmatic telescope and an array of 85 cameras for CMB
observations at arcminute resolutions, which meets the needs of the delensing
survey of CMB-S4. A detailed prescription of this three-mirror telescope and
cameras is provided, with a series of numerical calculations that indicate
expected optical performance and mechanical tolerance.
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