Design and Deployment of a Multichroic Polarimeter Array on the Atacama Cosmology Telescope

R. Datta, J. Austermann, J. A. Beall, D. Becker, K. P. Coughlin, S. M. Duff, P. A. Gallardo, E. Grace, M. Hasselfield, S. W. Henderson, G. C. Hilton, S. P. Ho, J. Hubmayr, B. J. Koopman, J. V. Lanen, D. Li, J. McMahon, C. D. Munson, F. Nati, M. D. NiemackL. Page, C. G. Pappas, M. Salatino, B. L. Schmitt, A. Schillaci, S. M. Simon, S. T. Staggs, J. R. Stevens, E. M. Vavagiakis, J. T. Ward, E. J. Wollack

Research output: Contribution to journalArticlepeer-review

18 Scopus citations


We present the design and the preliminary on-sky performance with respect to beams and passbands of a multichroic polarimeter array covering the 90 and 146 GHz cosmic microwave background bands and its enabling broad-band optical system recently deployed on the Atacama Cosmology Telescope (ACT). The constituent pixels are feedhorn-coupled multichroic polarimeters fabricated at NIST. This array is coupled to the ACT telescope via a set of three silicon lenses incorporating novel broad-band metamaterial anti-reflection coatings. This receiver represents the first multichroic detector array deployed for a CMB experiment and paves the way for the extensive use of multichroic detectors and broad-band optical systems in the next generation of CMB experiments.

Original languageEnglish (US)
Pages (from-to)568-575
Number of pages8
JournalJournal of Low Temperature Physics
Issue number3-4
StatePublished - Aug 1 2016

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • General Materials Science
  • Condensed Matter Physics


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