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Published May 8, 2002 | Published
Book Section - Chapter Open

POLAR: Instrument and Results

Abstract

We describe the design, performance, and results of a polarimeter used to make precision measurements of the 2.7 K cosmic microwave background. In the Spring of 2000 the instrument searched for polarized emission in three microwave frequency bands spanning 26–36 GHz. The instrument achieved high sensitivity and long-term stability, and has produced the most stringent limits to date on the amplitude of the large angular scale polarization of the cosmic microwave background radiation.

Additional Information

© 2002 American Institute of Physics. Issue Date: 8 May 2002. This work has been supported by NSF grants AST 93-18727, AST 98-02851, and AST 00-71213, and NASA grant NAG5-9194. BK and CO were supported by NASA GSRP Fellowships. POLAR'S HEMT amplifiers were provided by John Carlstrom.

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