QUBIC V: Cryogenic system design and performance

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

Research output: Contribution to journalArticlepeer-review

Abstract

Current experiments aimed at measuring the polarization of the Cosmic Microwave Background (CMB) use cryogenic detector arrays with cold optical systems to boost their mapping speed. For this reason, large volume cryogenic systems with large optical windows, working continuously for years, are needed. The cryogenic system of the QUBIC (Q & U Bolometric Interferometer for Cosmology) experiment solves a combination of simultaneous requirements: very large optical throughput (1/440 cm2sr), large volume (1/41 m3) and large mass (1/4165 kg) of the cryogenic instrument. Here we describe its design, fabrication, experimental optimization and validation in the Technological Demonstrator configuration. The QUBIC cryogenic system is based on a large volume cryostat that uses two pulse-tube refrigerators to cool the instrument to 1/43 K. The instrument includes the cryogenic polarization modulator, the corrugated feedhorn array, and the lower temperature stages: a 4He evaporator cooling the interferometer beam combiner to 1/41 K and a 3He evaporator cooling the focal-plane detector arrays to 1/40.3 K. The cryogenic system has been tested and validated for more than 6 months of continuous operation. The detector arrays have reached a stable operating temperature of 0.33 K, while the polarization modulator has operated at a 1/410 K base temperature. The system has been tilted to cover the boresight elevation range 20°-90° without significant temperature variations. The instrument is now ready for deployment to the high Argentinean Andes.

Original languageEnglish
Article number038
Pages (from-to)1-27
Number of pages27
JournalJournal of Cosmology and Astroparticle Physics
Volume2022
Issue number4
DOIs
Publication statusPublished - 21 Apr 2022

Keywords

  • CMBR detectors
  • CMBR experiments
  • CMBR polarisation
  • gravitational waves and CMBR polarization

Research Beacons, Institutes and Platforms

  • Manchester Cancer Research Centre

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