Feedhorn development and scalability for Simons Observatory and beyond

Abstract

The Simons Observatory (SO) will measure the cosmic microwave background (CMB) in both temperature and polarization over a wide range of angular scales and frequencies from 27-270 GHz with unprecedented sensitivity. One technology for coupling light onto the $\sim$50 detector wafers that SO will field is spline-profiled feedhorns, which offer tunability between coupling efficiency and control of beam polarization leakage effects. We will present efforts to scale up feedhorn production for SO and their viability for future CMB experiments, including direct-machining metal feedhorn arrays and laser machining stacked Si arrays.

References in corpus (1)

• CLASS: The Cosmology Large Angular Scale Surveyor

Cited by in corpus (8)

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• Monolithic Kilopixel Silicon Microlens Arrays for Future Far-Infrared Observatories
• The Simons Observatory: Characterizing the Large Aperture Telescope Receiver with Radio Holography
• Assembly development for the Simons Observatory focal plane readout module
• SiAl Alloy Feedhorn Arrays: Material Properties, Feedhorn Design, and Astrophysical Applications