The CAPMAP instrument, a four-element 90 GHz correlation polarimeter array, was built, calibrated, and shown to be sensitive enough to measure the CMB E-mode polarization at multipoles 500 to 1500.
The Sky Polarization Observatory
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abstract
SPOrt is an ASI-funded experiment specifically designed to measure the sky polarization at 22, 32 and 90 GHz, which was selected in 1997 by ESA to be flown on the International Space Station. Starting in 2006 and for at least 18 months, it will be taking direct and simultaneous measurements of the Stokes parameters Q and U at 660 sky pixels, with FWHM=7 degrees. Due to development efforts over the past few years, the design specifications have been significantly improved with respect to the first proposal. Here we present an up-to-date description of the instrument, which now warrants a pixel sensitivity of 1.7 microK for the polarization of the cosmic background radiation, assuming two years of observations. We discuss SPOrt scientific goals in the light of WMAP results, in particular in connection with the emerging double-reionization cosmological scenario.
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astro-ph.IM 1years
2024 1verdicts
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CAPMAP: A New Instrument to Measure the E-mode CMB Polarization on Angular Scales of 4 arcmin to 40 arcmin
The CAPMAP instrument, a four-element 90 GHz correlation polarimeter array, was built, calibrated, and shown to be sensitive enough to measure the CMB E-mode polarization at multipoles 500 to 1500.