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

Brian G. Keating·Christopher W. O'Dell·Joshua O. Gundersen·Lucio Piccirillo·Nate Stebor·Peter T. Timbie
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Abstract

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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Brian G. Keating, Christopher W. O'Dell, Joshua O. Gundersen, Lucio Piccirillo, Nate Stebor, Peter T. Timbie. 2002-09-19. An Instrument for Investigating the Large Angular Scale Polarization of the Cosmic Microwave Background. https://doi.org/10.1086/344522

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