Polenta, G and Ade, PAR and Bartlett, J and Breelle, E and Conversi, L and de Bernardis, P and Dufour, C and Gervasi, M and Giard, M and Giordano, C and Giraud-Heraud, Y and Maffei, B and Masi, S and Nati, F and Orlando, A and Peterzen, S and Piacentini, F and Piat, M and Piccirillo, L and Pisano, G and Pons, R and Rosset, C and Savini, G and Sironi, G and Tartari, A and Veneziani, M and Zannoni, M (2007) The BRAIN CMB polarization experiment. In: NEW ASTRONOMY REVIEWS. (pp. 256 - 259). ELSEVIER SCI LTD
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In the standard cosmological scenario tensor perturbations of the metric produce a rotational component in the Cosmic Microwave Background polarization, called B-modes. The expected signal is of the order of similar to 0.1 mu K, well beyond the sensitivity of current experiments. In this paper, we introduce the BRAIN experiment, a bolometric interferometer devoted to measure the B-modes polarization of the CMB from Concordia station in Antarctica. This experiment will take advantage of both high sensitivity of bolometer arrays and low level of systematic effects of interferometers. We report the results obtained during the first campaign we carried out this austral summer at Dome-C. Using a pathfinder experiment, we demonstrated that a cryocooler based cryogenic system can work in such environmental conditions. We also carried out preliminary observations of the atmospheric emission at 145 GHz from Dome-C, and during the next campaign we'll extend the measurements to all the Stokes parameters I, Q, U, V all over the winter. (c) 2006 Elsevier B.V. All rights reserved.
|Title:||The BRAIN CMB polarization experiment|
|Event:||Francesco Melchiorri Memorial Conference|
|Location:||Univ Rome, Dept Phys, Rome, ITALY|
|Dates:||2006-04-12 - 2006-04-14|
|Keywords:||cosmology, polarimetry, interferometry, background radiation, MICROWAVE BACKGROUND POLARIZATION, 2003 FLIGHT, BOOMERANG, SPECTRUM|
|UCL classification:||UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Physics and Astronomy|
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