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.

Cavaliere, F., Mennella, A., Zannoni, M., Battaglia, P., Battistelli, E., Burke, D., et al. (2022). QUBIC VII: The feedhorn-switchsystem of the technologicaldemonstrator. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2022(4) [10.1088/1475-7516/2022/04/040].

QUBIC VII: The feedhorn-switchsystem of the technologicaldemonstrator

M. Zannoni
;
A. Passerini;S. Banfi;M. Gervasi;F. Nati;
2022

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.
Si
Articolo in rivista - Articolo scientifico
Scientifica
CMBR detectors; CMBR experiments; CMBR polarisation; gravitational waves and CMBR polarization;
English
Cavaliere, F., Mennella, A., Zannoni, M., Battaglia, P., Battistelli, E., Burke, D., et al. (2022). QUBIC VII: The feedhorn-switchsystem of the technologicaldemonstrator. JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS, 2022(4) [10.1088/1475-7516/2022/04/040].
Cavaliere, F; Mennella, A; Zannoni, M; Battaglia, P; Battistelli, E; Burke, D; D’Alessandro, G; de Bernardis, P; De Petris, M; Franceschet, C; Grandsire, L; Hamilton, J; Maffei, B; Manzan, E; Marnieros, S; Masi, S; O’Sullivan, C; Passerini, A; Pezzotta, F; Piat, M; Tartari, A; Torchinsky, S; Viganò, D; Voisin, F; Ade, P; Alberro, J; Almela, A; Amico, G; Arnaldi, L; Auguste, D; Aumont, J; Azzoni, S; Bélier, B; Baù, A; Banfi, S; Bennett, D; Bergé, L; Bernard, J; Bersanelli, M; Bigot-Sazy, M; Bonaparte, J; Bonis, J; Bunn, E; Buzi, D; Chanial, P; Chapron, C; Charlassier, R; Cobos Cerutti, A; Columbro, F; Coppolecchia, A; De Gasperis, G; De Leo, M; Dheilly, S; Duca, C; Dumoulin, L; Etchegoyen, A; Fasciszewski, A; Ferreyro, L; Fracchia, D; Gómez Berisso, M; Gamboa Lerena, M; Ganga, K; García, B; García Redondo, M; Gaspard, M; Gayer, D; Gervasi, M; Giard, M; Gilles, V; Giraud-Heraud, Y; González, M; Gradziel, M; Hampel, M; Harari, D; Henrot-Versillé, S; Incardona, F; Jules, E; Kaplan, J; Kristukat, C; Lamagna, L; Loucatos, S; Louis, T; Marty, W; Mattei, A; May, A; Mcculloch, M; Mele, L; Melo, D; Montier, L; Mousset, L; Mundo, L; Murphy, J; Murphy, J; Nati, F; Olivieri, E; Oriol, C; Pagana, E; Paiella, A; Pajot, F; Pastoriza, H; Pelosi, A; Perbost, C; Perciballi, M; Piacentini, F; Piccirillo, L; Pisano, G; Platino, M; Polenta, G; Prêle, D; Puddu, R; Rambaud, D; Rasztocky, E; Ringegni, P; Romero, G; Salum, J; Scóccola, C; Schillaci, A; Scully, S; Spinelli, S; Stankowiak, G; Stolpovskiy, M; Supanitsky, A; Thermeau, J; Timbie, P; Tomasi, M; Tucker, G; Tucker, C; Vittorio, N; Wicek, F; Wright, M; Zullo, A
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/10281/282741
Citazioni
  • Scopus 7
  • ???jsp.display-item.citation.isi??? 1
Social impact