Torchinsky, S.A. and Hamilton, J.-Ch. and Piat, M. and Battistelli, E.S. and de Bernardis, P. and Chapron, C. and D'Alessandro, G. and De Petris, M. and Gamboa Lerena, M.M. and González, M. and Grandsire, L. and Marnieros, S. and Masi, S. and Mennella, A. and Mousset, L. and Murphy, J.D. and O'Sullivan, Créidhe and Prêle, D. and Stankowiak, G. and Tartari, A. and Thermeau, J.-P. and Voisin, F. and Zannoni, M. and Ade, P. and Alberro, J.G. and Almela, A. and Amico, G. and Arnaldi, L.H. and Auguste, D. and Aumont, J. and Azzoni, S. and Banfi, S. and Baù, A. and Bélier, B. and Bennett, D. and Bergé, L. and Bernard, J.-Ph. and Bersanelli, M. and Bigot-Sazy, M.-A. and Bonaparte, J. and Bonis, J. and Bunn, E. and Burke, D. and Buzi, D. and Cavaliere, F. and Chanial, P. and Charlassier, R. and Cobos Cerutti, A.C. and Columbro, F. and Coppolecchia, A. and De Gasperis, G. and De Leo, M. and Dheilly, S. and Duca, C. and Dumoulin, L. and Etchegoyen, A. and Fasciszewski, A. and Ferreyro, L.P. and Fracchia, D. and Franceschet, C. and Ganga, K.M. and García, B. and García Redondo, M.E. and Gaspard, M. and Gayer, D. and Gervasi, M. and Giard, M. and Gilles, V. and Giraud-Heraud, Y. and Gómez Berisso, M. and Gradziel, M. and Hampel, M.R. and Harari, D. and Henrot-Versillé, S. and Incardona, F. and Jules, E. and Kaplan, J. and Kristukat, C. and Lamagna, L. and Loucatos, S. and Louis, T. and Maffei, B. and Marty, W. and Mattei, A. and May, A. and McCulloch, M. and Mele, L. and Melo, D. and Montier, L. and Mundo, L.M. and Murphy, J.A. and Nati, F. and Olivieri, E. and Oriol, C. and Paiella, A. and Pajot, F. and Passerini, A. and Pastoriza, H. and Pelosi, A. and Perbost, C. and Perciballi, M. and Pezzotta, F. and Piacentini, F. and Piccirillo, L. and Pisano, G. and Platino, M. and Polenta, G. and Puddu, R. and Rambaud, D. and Rasztocky, E. and Ringegni, P. and Romero, G.E. and Salum, J.M. and Schillaci, A. and Scóccola, C.G. and Scully, S. and Spinelli, S. and Stolpovskiy, M. and Supanitsky, A.D. and Timbie, P. and Tomasi, M. and Tucker, C. and Tucker, G. and Viganò, D. and Vittorio, N. and Wicek, F. and Wright, M. and Zullo, A. (2022) QUBIC III: Laboratory characterization. Journal of Cosmology and Astroparticle Physics, 2022 (04). 036. ISSN 1475-7516

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Abstract

We report on an extensive test campaign of a prototype version of the QUBIC (Q & U Bolometric Interferometer for Cosmology) instrument, carried out at Astroparticle Physics and Cosmology (APC) in Paris. Exploiting the novel concept called bolometric interferometry, QUBIC is designed to measure the CMB polarization at 150 and 220 GHz from a high altitude site at Alto Chorillo, Argentina. The prototype model called QUBIC Technological Demonstrator (QUBIC-TD) operates in a single frequency band (150 GHz) and with a reduced number of baselines, but it contains all the elements of the QUBIC instrument in its final configuration. The test campaign included measurements of the synthesized beam and of the polarization performance, as well as a verification of the interference fringe pattern. A modulated, frequency-tunable millimetre-wave source was placed in the telescope far-field and was used to simulate a point source. The QUBIC-TD field of view was scanned across the source to produce beam maps. Our measurements confirm the frequency-dependent behaviour of the beam profile, which gives QUBIC the possibility to do spectral imaging. The measured polarization performance indicates a cross-polarization leakage less than 0.6%. We also successfully tested the polarization modulation system, which is provided by a rotating half wave plate. We demonstrate the full mapmaking pipeline using data from this measurement campaign, effectively giving an end-to-end checkout of the entire QUBIC system, including all hardware subsystems, their interfaces, and the software to operate the whole system and run the analysis. Our results confirm the viability of bolometric interferometry for measurements of the CMB polarization.

Item Type:	Article
Keywords:	CMBR detectors; CMBR experiments; CMBR polarisation; gravitational waves; CMBR polarization;
Academic Unit:	Faculty of Science and Engineering > Experimental Physics
Item ID:	18826
Identification Number:	https://doi.org/10.1088/1475-7516/2022/04/036
Depositing User:	Dr. Créidhe O'Sullivan
Date Deposited:	03 Sep 2024 15:30
Journal or Publication Title:	Journal of Cosmology and Astroparticle Physics
Publisher:	IOP Publishing
Refereed:	Yes
URI:	Publisher
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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