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QUBIC VIII: Optical design and performance

O'Sullivan, C., De Petris, M., Amico, G., Battistelli, E.S., de Bernardis, P., Burke, D., Buzi, D., Chapron, C., Conversi, L., D'Alessandro, G., De Leo, M., Gayer, D., Grandsire, L., Hamilton, J.-Ch., Marnieros, S., Masi, S., Mattei, A., Mennella, A., Mousset, L., Murphy, J.D., Pelosi, A., Perciballi, M., Piat, M., Scully, S., Tartari, A., Torchinsky, S.A., Voisin, F., Zannoni, M., Zullo, A., Ade, P. ORCID:, Alberro, J.G., Almela, A., Arnaldi, L.H., Auguste, D., Aumont, J., Azzoni, S., Banfi, S., Baù, A., Bélier, B., Bennett, D., Bergé, L., Bernard, J.-Ph., Bersanelli, M., Bigot-Sazy, M.-A., Bonaparte, J., Bonis, J., Bunn, E., Cavaliere, F., Chanial, P., Charlassier, R., Cobos Cerutti, A.C., Columbro, F., Coppolecchia, A., De Gasperis, G., Dheilly, S., Duca, C., Dumoulin, L., Etchegoyen, A., Fasciszewski, A., Ferreyro, L.P., Fracchia, D., Franceschet, C., Gamboa Lerena, M.M., Ganga, K.M., García, B., García Redondo, M.E., Gaspard, M., Gervasi, M., Giard, M., Gilles, V., Giraud-Heraud, Y., Gómez Berisso, M., González, M., Gradziel, M., Hampel, M.R., Harari, D., Henrot-Versillé, S., Incardona, F., Jules, E., Kaplan, J., Kristukat, C., Lamagna, L., Loucatos, S., Louis, T., Maffei, B., Marty, W., May, A., McCulloch, M., Mele, L., Melo, D., Montier, L., Mundo, L.M., Murphy, J.A., Nati, F., Olivieri, E., Oriol, C., Paiella, A., Pajot, F., Passerini, A., Pastoriza, H., Perbost, C., Pezzotta, F., Piacentini, F., Piccirillo, L., Pisano, G. ORCID:, Platino, M., Polenta, G., Prêle, D., Puddu, R., Rambaud, D., Rasztocky, E., Ringegni, P., Romero, G.E., Salum, J.M., Schillaci, A., Scóccola, C.G., Spinelli, S., Stankowiak, G., Stolpovskiy, M., Supanitsky, A.D., Thermeau, J.-P., Timbie, P., Tomasi, M., Tucker, C. ORCID:, Tucker, G. ORCID:, Viganò, D., Vittorio, N., Wicek, F. and Wright, M. 2022. QUBIC VIII: Optical design and performance. Journal of Cosmology and Astroparticle Physics 2022 (04) , 041. 10.1088/1475-7516/2022/04/041

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The Q and U Bolometric Interferometer for Cosmology (QUBIC) is a ground-based experiment that aims to detect B-mode polarization anisotropies [1] in the CMB at angular scales around the ℓ ≃100 recombination peak. Systematic errors make ground-based observations of B modes at millimetre wavelengths very challenging and QUBIC mitigates these problems in a somewhat complementary way to other existing or planned experiments using the novel technique of bolometric interferometry. This technique takes advantage of the sensitivity of an imager and the systematic error control of an interferometer. A cold reflective optical combiner superimposes the re-emitted beams from 400 aperture feedhorns on two focal planes. A shielding system composed of a fixed groundshield, and a forebaffle that moves with the instrument, limits the impact of local contaminants. The modelling, design, manufacturing and preliminary measurements of the optical components are described in this paper.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Publisher: IOP Publishing
ISSN: 1475-7516
Date of First Compliant Deposit: 7 June 2022
Date of Acceptance: 6 June 2021
Last Modified: 11 Oct 2023 05:46

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