An Instrument for Investigating the Large Angular Scale Polarization of the Cosmic Microwave Background

(2) University of Wisconsin -- Madison; (3) University of Miami; (4) University of Wales; (5) UCSB); Brian G. Keating (1); Cardiff; Christopher W. O'Dell (2); Joshua O. Gundersen (3); Lucio Piccirillo (4); Nate Stebor (5)

arxiv: astro-ph/0111276 · v2 · submitted 2001-11-14 · 🌌 astro-ph

An Instrument for Investigating the Large Angular Scale Polarization of the Cosmic Microwave Background

Brian G. Keating (1) , Christopher W. O'Dell (2) , Joshua O. Gundersen (3) , Lucio Piccirillo (4) , Nate Stebor (5) , Peter T. Timbie (2) ((1) Caltech , (2) University of Wisconsin -- Madison , (3) University of Miami

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(4) University of Wales Cardiff (5) UCSB)

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keywords microwaveinstrumentangularbackgroundcosmiclargepolarimeterpolarization

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We describe the design and performance of a microwave polarimeter used to make precision measurements of polarized astrophysical radiation in three microwave frequency bands spanning 26-36 GHz. The instrument uses cooled HEMT amplifiers in a correlation polarimeter configuration to achieve high sensitivity and long-term stability. The instrument demonstrates long term stability and has produced the most restrictive upper limits to date on the large angular scale polarization of the 2.7 K cosmic microwave background radiation.

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An Instrument for Investigating the Large Angular Scale Polarization of the Cosmic Microwave Background

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