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arXiv · 1809.07373

Feedhorn development and scalability for Simons Observatory and beyond

Sara M. Simon·Joseph E. Golec·Aamir Ali·Jason Austermann·James A. Beall·Sarah Marie M. Bruno·Steve K. Choi·Kevin T. Crowley·Simon Dicker·Bradley Dober·Shannon M. Duff·Erin Healy·Charles A. Hill·Shuay-Pwu Patty Ho·Johannes Hubmayr·Yaqiong Li·Marius Lungu·Jeff McMahon·John Orlowski-Scherer·Maria Salatino·Suzanne Staggs·Edward J. Wollack·Zhilei Xu·Ningfeng Zhu
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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.

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Sara M. Simon, Joseph E. Golec, Aamir Ali, Jason Austermann, James A. Beall, Sarah Marie M. Bruno, Steve K. Choi, Kevin T. Crowley, Simon Dicker, Bradley Dober, Shannon M. Duff, Erin Healy, Charles A. Hill, Shuay-Pwu Patty Ho, Johannes Hubmayr, Yaqiong Li, Marius Lungu, Jeff McMahon, John Orlowski-Scherer, Maria Salatino, Suzanne Staggs, Edward J. Wollack, Zhilei Xu, Ningfeng Zhu. 2018-09-19. Feedhorn development and scalability for Simons Observatory and beyond. https://doi.org/10.1117/12.2313405

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