QUBIC VII: The feedhorn-switch system of the technological demonstrator
Date Issued
2022
Author(s)
Cavaliere, F.
•
Mennella, A.
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Zannoni, M.
•
•
Battistelli, E. S.
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de Bernardis, P.
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Burke, D.
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D'Alessandro, G.
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de Petris, M.
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Franceschet, C.
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Grandsire, L.
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Perbost, C.
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Perciballi, M.
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Piacentini, F.
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Piccirillo, L.
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Pisano, G.
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Platino, M.
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Polenta, G.
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Prêle, D.
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Puddu, R.
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Rambaud, D.
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Hamilton, J. -Ch.
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Rasztocky, E.
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Ringegni, P.
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Romero, G. E.
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Salum, J. M.
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Schillaci, A.
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Scóccola, C. G.
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Scully, S.
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Spinelli, S.
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Stankowiak, G.
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Stolpovskiy, M.
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Maffei, B.
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Supanitsky, A. D.
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Thermeau, J. -P.
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Timbie, P.
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Tomasi, M.
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Tucker, C.
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Tucker, G.
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Vittorio, N.
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Wicek, F.
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Wright, M.
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Zullo, A.
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Manzan, E.
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QUBIC Collaboration
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Marnieros, S.
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Masi, S.
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O'Sullivan, C.
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Passerini, A.
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Pezzotta, F.
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Piat, M.
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Tartari, A.
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Torchinsky, S. A.
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Viganò, D.
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Voisin, F.
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Ade, P.
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Alberro, J. G.
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Almela, A.
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Amico, G.
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Arnaldi, L. H.
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Auguste, D.
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Aumont, J.
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Azzoni, S.
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Banfi, S.
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Baù, A.
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Bélier, B.
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Bennett, D.
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Bergé, L.
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Bernard, J. -Ph.
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Bersanelli, M.
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Bigot-Sazy, M. -A.
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Bonaparte, J.
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Bonis, J.
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Bunn, E.
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Buzi, D.
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Chanial, P.
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Chapron, C.
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Charlassier, R.
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Cobos Cerutti, A. C.
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Columbro, F.
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Coppolecchia, A.
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de Gasperis, G.
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de Leo, M.
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Dheilly, S.
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Duca, C.
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Dumoulin, L.
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Etchegoyen, A.
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Fasciszewski, A.
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Ferreyro, L. P.
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Fracchia, D.
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Gamboa Lerena, M. M.
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Ganga, K. M.
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García, B.
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García Redondo, M. E.
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Gaspard, M.
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Gayer, D.
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Gervasi, M.
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Giard, M.
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Gilles, V.
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Giraud-Heraud, Y.
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Gómez Berisso, M.
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González, M.
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Gradziel, M.
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Hampel, M. R.
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Harari, D.
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Henrot-Versillé, S.
•
•
Jules, E.
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Kaplan, J.
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Kristukat, C.
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Lamagna, L.
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Loucatos, S.
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Louis, T.
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Marty, W.
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Mattei, A.
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May, A.
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McCulloch, M.
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Mele, L.
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Melo, D.
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Montier, L.
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Mousset, L.
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Mundo, L. M.
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Murphy, J. A.
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Murphy, J. D.
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Nati, F.
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Olivieri, E.
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Oriol, C.
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Paiella, A.
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Pajot, F.
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Pastoriza, H.
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Pelosi, A.
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.
Volume
2022
Issue
4
Start page
040
Issn Identifier
1475-7516
Ads BibCode
2022JCAP...04..040C
Rights
open.access
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