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14 February 2003 Dual output polarimeter devoted to the study of the Cosmic Microwave Background
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Abstract
We have developed a correlation radiometer at 33 GHz devoted to the search for the residual polarization of the Cosmic Microwave Background (CMB). The two instrument's outputs are a linear combination of two Stokes parameters. The instrument is therefore directly sensitive to the polarized component of the radiation (rispectively linear and circular). The radiometer has a beamwidth of 7 or 14 degree, but it can be coupled to a telescope increasing the resolution. The expected CMB polarization is at most a part per million. The polarimeter has been designed to be sensitive to this faint signal, and it has been optimized to improve its long term stability, observing from the ground. In this contribution the performances of the instrument are presented, together with the preliminary tests and observations.
© (2003) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Massimo Gervasi, Giuliano Boella, Francesco Cavaliere, Giovanni Grossetti, Andrea Passerini, Giorgio Sironi, Andrea Tartari, and Mario Zannoni "Dual output polarimeter devoted to the study of the Cosmic Microwave Background", Proc. SPIE 4843, Polarimetry in Astronomy, (14 February 2003); https://doi.org/10.1117/12.458871
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