New Astronomy, Volume 10, Issue 2, p. 79-89.
Orlando, A.; Battistelli, E. S.; Savini, G.; Maoli, R.; Lamagna, L.; De Petris, M.; De Gregori, S.; Conversi, L.; Catalano, A.
We describe an experiment to measure calibration sources, the polarization of Cosmic Microwave Background Radiation (CMBR) and the polarization induced on the CMBR from S-Z effects, using a polarimeter, MITOPol, that will be employed at the MITO telescope. Two modulation methods are presented and compared: an amplitude modulation with a Fresnel double rhomb and a phase modulation with a modified Martin-Puplett interferometer. A first light is presented from the campaign (summer 2003) that has permitted to estimate the instrument spurious polarization using the second modulation method.