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Proceedings Paper

Dual output polarimeter devoted to the study of the Cosmic Microwave Background
Author(s): Massimo Gervasi; Giuliano Boella; Francesco Cavaliere; Giovanni Grossetti; Andrea Passerini; Giorgio Sironi; Andrea Tartari; Mario Zannoni
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Paper 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.

Paper Details

Date Published: 14 February 2003
PDF: 12 pages
Proc. SPIE 4843, Polarimetry in Astronomy, (14 February 2003); doi: 10.1117/12.458871
Show Author Affiliations
Massimo Gervasi, Univ. degli Studi di Milano-Bicocca (Italy)
Giuliano Boella, Univ. degli Studi di Milano-Bicocca (Italy)
Francesco Cavaliere, Univ. degli Studi di Milano (Italy)
Giovanni Grossetti, Univ. degli Studi di Milano (Italy)
Univ. degli Studi di Milano-Bicocca (Italy)
Andrea Passerini, Univ. degli Studi di Milano-Bicocca (Italy)
Giorgio Sironi, Univ. degli Studi di Milano-Bicocca (Italy)
Andrea Tartari, Univ. degli Studi di Milano-Bicocca (Italy)
Mario Zannoni, Univ. degli Studi di Milano-Bicocca (Italy)
Istituto di Astrofisica-CNR (Italy)


Published in SPIE Proceedings Vol. 4843:
Polarimetry in Astronomy
Silvano Fineschi, Editor(s)

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