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Published April 2022 | Accepted Version
Journal Article Open

QUBIC VII: The feedhorn-switch system of the technological demonstrator

Cavaliere, F.
Mennella, A. ORCID icon
Zannoni, M. ORCID icon
Battaglia, P.
Battistelli, E. S. ORCID icon
de Bernardis, P. ORCID icon
Burke, D.
D'Alessandro, G.
De Petris, M. ORCID icon
Franceschet, C. ORCID icon
Grandsire, L.
Hamilton, J.-Ch.
Maffei, B. ORCID icon
Manzan, B.
Marnieros, S. ORCID icon
Masi, S. ORCID icon
O'Sullivan, C.
Passerini, A.
Pezzotta, F.
Piat, M.
Tartari, A. ORCID icon
Torchinsky, S. A. ORCID icon
Viganò, D.
Voisin, F.
Ade, P. ORCID icon
Alberro, J. G.
Almela, A.
Amico, G.
Arnaldi, L. H.
Auguste, D.
Aumont, J. ORCID icon
Azzoni, S. ORCID icon
Banfi, S.
Baù, A.
Bélier, B. ORCID icon
Bennett, D. ORCID icon
Bergé, L.
Bernard, J.-Ph.
Bersanelli, M.
Bigot-Sazy, M.-A.
Bonaparte, J.
Bonis, J.
Bunn, E. ORCID icon
Buzi, D.
Chanial, P. ORCID icon
Chapron, C.
Charlassier, R.
Cobos Cerutti, A. C.
Columbro, F. ORCID icon
Coppolecchia, A. ORCID icon
De Gasperis, G. ORCID icon
De Leo, M.
Dheilly, S.
Duca, C.
Dumoulin, L.
Etchegoyen, A. ORCID icon
Fasciszewski, A.
Ferreyro, L. P.
Fracchia, D.
Gamboa Lerena, M. M. ORCID icon
Ganga, K. M.
García, B.
García Redondo, M. E.
Gaspard, M.
Gayer, D.
Gervasi, M. ORCID icon
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. ORCID icon
Lamagna, L. ORCID icon
Loucatos, S. ORCID icon
Louis, T. ORCID icon
Marty, W.
Mattei, A.
May, A.
McCulloch, M.
Mele, L. ORCID icon
Melo, D.
Montier, L.
Mousset, L.
Mundo, L. M.
Murphy, J. A.
Murphy, J. D.
Nati, F. ORCID icon
Olivieri, E. ORCID icon
Oriol, C.
Paiella, A. ORCID icon
Pajot, F.
Pastoriza, H. ORCID icon
Pelosi, A.
Perbost, C.
Perciballi, M.
Piacentini, F. ORCID icon
Piccirillo, L.
Pisano, G.
Platino, M.
Polenta, G.
Prêle, D. ORCID icon
Puddu, R.
Rambaud, D.
Rasztocky, E. ORCID icon
Ringegni, P.
Romero, G. E.
Salum, J. M.
Schillaci, A. ORCID icon
Scóccola, C. G. ORCID icon
Scully, S.
Spinelli, S.
Stankowiak, G. ORCID icon
Stolpovskiy, M. ORCID icon
Supanitsky, A. D. ORCID icon
Thermeau, J.-P.
Timbie, P. ORCID icon
Tomasi, M. ORCID icon
Tucker, C. ORCID icon
Tucker, G. ORCID icon
Vittorio, N.
Wicek, F.
Wright, M.
Zullo, A.
QUBIC Collaboration

Abstract

We present the design, manufacturing and performance of the horn-switch system developed for the technological demonstrator of QUBIC (the Q&U Bolometric Interferometer for Cosmology). This system consists of 64 back-to-back dual-band (150 GHz and 220 GHz) corrugated feed-horns interposed with mechanical switches used to select desired baselines during the instrument self-calibration. We manufactured the horns in aluminum platelets milled by photo-chemical etching and mechanically tightened with screws. The switches are based on steel blades that open and close the waveguide between the back-to-back horns and are operated by miniaturized electromagnets. The measured electromagnetic performance of the feedhorns agrees with simulations. In particular we obtained a return loss around –20 dB up to 230 GHz and beam patterns in agreement with single-mode simulations down to –30 dB. The switches for this prototype were designed and built for the 150 GHz band. In this frequency range we find return and insertion losses consistent with expectations (< –25 dB and ∼ –0.1 dB, respectively) and an isolation larger than 70 dB. In this paper we also show the current development status of the feedhorn-switch system for the QUBIC full instrument, based on an array of 400 horn-switch assemblies.

Additional Information

© 2022 IOP Publishing Ltd and Sissa Medialab. Received 25 November 2020; Accepted 3 February 2022; Published 21 April 2022. QUBIC is funded by the following agencies. France: ANR (Agencie Nationale de la Recherche) 2012 and 2014, DIM-ACAV (Domaine d'Interet Majeur-Astronomie et Conditions d'Apparition de la Vie), Labex UnivEarthS (Universitè de Paris), CNRS/IN2P3 (Centre National de la Recherche Scientifique/Institut National de Physique Nuclèaire et de Physique des Particules), CNRS/INSU (Centre National de la Recherche Scientifique/Institut National des Sciences de l'Univers). Italy: CNR/PNRA (Consiglio Nazionale delle Ricerche/Programma Nazionale Ricerche in Antartide) until 2016, INFN (Istituto Nazionale di Fisica Nucleare) since 2017. Argentina: MINCyT (Ministerio de Ciencia, Tecnología e Innovación), CNEA (Comisión Nacional de Energía Atómica), CONICET (Consejo Nacional de Investigaciones Científicas y Técnicas). Ireland: D. Burke and J.D. Murphy acknowledge funding from the Irish Research Council under the Government of Ireland Postgraduate Scholarship Scheme. D. Gayer and S. Scully acknowledge funding from the National University of Ireland, Maynooth. D. Bennett acknowledges funding from Science Foundation Ireland.

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Additional details

Created:
August 22, 2023
Modified:
October 24, 2023