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9 July 2018 Systematic error cancellation for the PIXIE four-port interferometric polarimeter
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The Primordial In ation Explorer (PIXIE) is an Explorer-class mission concept to measure the gravitational-wave signature of primordial in ation through its distinctive imprint on the linear polarization of the cosmic microwave background. Its optical system couples a polarizing Fourier transform spectrometer to the sky to measure the differential signal between orthogonal linear polarization states from two co-pointed beams on the sky. The double differential nature of the four-port measurement mitigates beam-related systematic errors common to the two-port systems used in most CMB measurements. We describe the polarized beam patterns for PIXIE and assess the systematic error for measurements of CMB polarization.
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Alan Kogut and Dale J. Fixsen "Systematic error cancellation for the PIXIE four-port interferometric polarimeter", Proc. SPIE 10708, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX, 107083U (9 July 2018);


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