The design and characterization of wideband spline-profiled feedhorns for Advanced ACTPol

Sara M. Simon; Jason Austermann; James A. Beall; Steve K Choi; Kevin P. Coughlin; Shannon M. Duff; Patricio A. Gallardo; Shawn W. Henderson; Felicity B. Hills; Shuay-Pwu Patty Ho; Johannes Hubmayr; Alec Josaitis; Brian J. Koopman; Jeff J. McMahon; Federico Nati; Laura Newburgh; Michael D. Niemack; Maria Salatino; Alessandro Schillaci; Benjamin L. Schmitt; Suzanne T. Staggs; Eve M. Vavagiakis; Jonathan Ward; Edward J. Wollack

doi:10.1117/12.2233603

19 July 2016 The design and characterization of wideband spline-profiled feedhorns for Advanced ACTPol

Sara M. Simon, Jason Austermann, James A. Beall, Steve K Choi, Kevin P. Coughlin, Shannon M. Duff, Patricio A. Gallardo, Shawn W. Henderson, Felicity B. Hills, Shuay-Pwu Patty Ho, Johannes Hubmayr, Alec Josaitis, Brian J. Koopman, Jeff J. McMahon, Federico Nati, Laura Newburgh, Michael D. Niemack, Maria Salatino, Alessandro Schillaci, Benjamin L. Schmitt, Suzanne T. Staggs, Eve M. Vavagiakis, Jonathan Ward, Edward J. Wollack

Author Affiliations +

Proceedings Volume 9914, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII; 991416 (2016) https://doi.org/10.1117/12.2233603
Event: SPIE Astronomical Telescopes + Instrumentation, 2016, Edinburgh, United Kingdom

Abstract

Advanced ACTPol (AdvACT) is an upgraded camera for the Atacama Cosmology Telescope (ACT) that will measure the cosmic microwave background in temperature and polarization over a wide range of angular scales and five frequency bands from 28-230 GHz. AdvACT will employ four arrays of feedhorn-coupled, polarization- sensitive multichroic detectors. To accommodate the higher pixel packing densities necessary to achieve Ad- vACT’s sensitivity goals, we have developed and optimized wideband spline-profiled feedhorns for the AdvACT multichroic arrays that maximize coupling efficiency while carefully controlling polarization systematics. We present the design, fabrication, and testing of wideband spline-profiled feedhorns for the multichroic arrays of AdvACT.

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Sara M. Simon, Jason Austermann, James A. Beall, Steve K Choi, Kevin P. Coughlin, Shannon M. Duff, Patricio A. Gallardo, Shawn W. Henderson, Felicity B. Hills, Shuay-Pwu Patty Ho, Johannes Hubmayr, Alec Josaitis, Brian J. Koopman, Jeff J. McMahon, Federico Nati, Laura Newburgh, Michael D. Niemack, Maria Salatino, Alessandro Schillaci, Benjamin L. Schmitt, Suzanne T. Staggs, Eve M. Vavagiakis, Jonathan Ward, and Edward J. Wollack "The design and characterization of wideband spline-profiled feedhorns for Advanced ACTPol", Proc. SPIE 9914, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy VIII, 991416 (19 July 2016); https://doi.org/10.1117/12.2233603

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