Dual output polarimeter devoted to the study of the Cosmic Microwave Background

Massimo Gervasi; Giuliano Boella; Francesco Cavaliere; Giovanni Grossetti; Andrea Passerini; Giorgio Sironi; Andrea Tartari; Mario Zannoni

doi:10.1117/12.458871

14 February 2003 Dual output polarimeter devoted to the study of the Cosmic Microwave Background

Massimo Gervasi, Giuliano Boella, Francesco Cavaliere, Giovanni Grossetti, Andrea Passerini, Giorgio Sironi, Andrea Tartari, Mario Zannoni

Author Affiliations +

Proceedings Volume 4843, Polarimetry in Astronomy; (2003) https://doi.org/10.1117/12.458871
Event: Astronomical Telescopes and Instrumentation, 2002, Waikoloa, Hawai'i, United States

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.

Citation Download Citation

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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