QUBIC Technical Design Report

J. Aumont , S. Banfi , P. Battaglia , E.S. Battistelli , A. Ba\`u , B. B\'elier , D.Bennett , L. Berg\'e

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J.Ph. Bernard M. Bersanelli M.A. Bigot-Sazy N. Bleurvacq G. Bordier J. Brossard E.F. Bunn D. Buzi A. Buzzelli D. Cammilleri F. Cavaliere P. Chanial C. Chapron G. Coppi A. Coppolecchia F. Couchot R. D'Agostino G. D'Alessandro P. De Bernardis G. De Gasperis M. De Petris T. Decourcelle F. Del Torto L. Dumoulin A. Etchegoyen C. Franceschet B. Garcia A. Gault D. Gayer M. Gervasi A. Ghribi M. Giard Y. Giraud-H\'eraud M. Gradziel L. Grandsire J.Ch. Hamilton D. Harari V. Haynes S. Henrot-Versill\'e N. Holtzer J. Kaplan A. Korotkov L. Lamagna J. Lande S. Loucatos A. Lowitz V. Lukovic B. Maffei S. Marnieros J. Martino S. Masi A. May M. McCulloch M.C. Medina S. Melhuish A. Mennella L. Montier A. Murphy D. N\'eel M.W. Ng C. O'Sullivan A. Paiella F. Pajot A. Passerini A.Pelosi C. Perbost O. Perdereau F. Piacentini M. Piat L. Piccirillo G. Pisano D. Pr\^ele R. Puddu D. Rambaud O. Rigaut G.E. Romero M. Salatino A. Schillaci S. Scully M. Stolpovskiy F. Suarez A. Tartari P. Timbie M. Tristram G. Tucker D. Vigan\`o N. Vittori F. Voisin B. Watson M. Zannoni A. Zullo

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classification 🌌 astro-ph.IM astro-ph.CO

keywords instrumentpolarizationprimordialqubicsignaldesignforegroundsmode

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QUBIC is an instrument aiming at measuring the B mode polarisation anisotropies at medium scales angular scales (30-200 multipoles). The search for the primordial CMB B-mode polarization signal is challenging, because of many difficulties: smallness of the expected signal, instrumental systematics that could possibly induce polarization leakage from the large E signal into B, brighter than anticipated polarized foregrounds (dust) reducing to zero the initial hope of finding sky regions clean enough to have a direct primordial B-modes observation. The QUBIC instrument is designed to address all aspects of this challenge with a novel kind of instrument, a Bolometric Interferometer, combining the background-limited sensitivity of Transition-Edge-Sensors and the control of systematics allowed by the observation of interference fringe patterns, while operating at two frequencies to disentangle polarized foregrounds from primordial B mode polarization. Its characteristics are described in details in this Technological Design Report.

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QUBIC Technical Design Report

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