Simulations and performance of the QUBIC optical beam combiner

C. O'Sullivan; D. Burke; D. Gayer; J. D. Murphy; S. Scully; M. De Leo; M. De Petris; A. Mattei; A. Zullo; A. Mennella; M. Zannoni; N. Bleurvacq; C. Chapron; J.-Ch. Hamilton; M. Piat; P. Ade; G. Amico; D. Auguste; J. Aumont; S. Banfi; G. Barbarán; P. Battaglia; E. Battistelli; A. Baù; B. Bélier; D. Bennett; L. Bergé; J.-Ph. Bernard; M. Bersanelli; M.-A. Bigot-Sazy; J. Bonaparte; J. Bonis; G. Bordier; E. Bréelle; E. Bunn; D. Buzi; A. Buzzelli; F. Cavaliere; P. Chanial; R. Charlassier; F. Columbro; G. Coppi; A. Coppolecchia; F. Couchot; R. D'Agostino; G. D’Alessandro; P. de Bernardis; G. De Gasperis; A. Di Donato; L. Dumoulin; A. Etchegoyen; A. Fasciszewski; C. Franceschet; M. M. Gamboa Lerena; B. García; X. Garrido; M. Gaspard; A. Gault; M. Gervasi; M. Giard; Y. Giraud-Héraud; M. Gómez Berisso; M. González; M. Gradziel; L. Grandsire; E. Guerrard; D. Harari; V. Haynes; S. Henrot-Versillé; D. T. Hoang; F. Incardona; E. Jules; J. Kaplan; A. Korotkov; C. Kristukat; L. Lamagna; S. Loucatos; T. Louis; A. Lowitz; V. Lukovic; R. Luterstein; B. Maffei; S. Marnieros; S. Masi; A. May; M. McCulloch; M. C. Medina; L. Mele; S. Melhuish; L. Montier; L. M. Mundo; J. A. Murphy; E. Olivieri; A. Paiella; F. Pajot; A. Passerini; H. Pastoriza; A. Pelosi; C. Perbost; O. Perdereau; F. Pezzotta; F. Piacentini; L. Piccirillo; G. Pisano; G. Polenta; D. Prêle; R. Puddu; D. Rambaud; P. Ringegni; G. E. Romero; M. Salatino; A. Schillaci; C. G. Scóccola; S. Spinelli; M. Stolpovskiy; F. Suarez; A. Tartari; J.-P. Thermeau; P. Timbie; S. A. Torchinsky; M. Tristram; V. Truongcanh; C. Tucker; G. Tucker; S. Vanneste; D. Viganò; N. Vittorio; F. Voisin; B. Watson; F. Wicek

doi:10.1117/12.2313256

9 July 2018 Simulations and performance of the QUBIC optical beam combiner

C. O'Sullivan, D. Burke, D. Gayer, J. D. Murphy, S. Scully, M. De Leo, M. De Petris, A. Mattei, A. Zullo, A. Mennella, M. Zannoni, N. Bleurvacq, C. Chapron, J.-Ch. Hamilton, M. Piat, P. Ade, G. Amico, D. Auguste, J. Aumont, S. Banfi, G. Barbarán, P. Battaglia, E. Battistelli, A. Baù, B. Bélier, D. Bennett, L. Bergé, J.-Ph. Bernard, M. Bersanelli, M.-A. Bigot-Sazy, J. Bonaparte, J. Bonis, G. Bordier, E. Bréelle, E. Bunn, D. Buzi, A. Buzzelli, F. Cavaliere, P. Chanial, R. Charlassier, F. Columbro, G. Coppi, A. Coppolecchia, F. Couchot, R. D'Agostino, G. D’Alessandro, P. de Bernardis, G. De Gasperis, A. Di Donato, L. Dumoulin, A. Etchegoyen, A. Fasciszewski, C. Franceschet, M. M. Gamboa Lerena, B. García, X. Garrido, M. Gaspard, A. Gault, M. Gervasi, M. Giard, Y. Giraud-Héraud, M. Gómez Berisso, M. González, M. Gradziel, L. Grandsire, E. Guerrard, D. Harari, V. Haynes, S. Henrot-Versillé, D. T. Hoang, F. Incardona, E. Jules, J. Kaplan, A. Korotkov, C. Kristukat, L. Lamagna, S. Loucatos, T. Louis, A. Lowitz, V. Lukovic, R. Luterstein, B. Maffei, S. Marnieros, S. Masi, A. May, M. McCulloch, M. C. Medina, L. Mele, S. Melhuish, L. Montier, L. M. Mundo, J. A. Murphy, E. Olivieri, A. Paiella, F. Pajot, A. Passerini, H. Pastoriza, A. Pelosi, C. Perbost, O. Perdereau, F. Pezzotta, F. Piacentini, L. Piccirillo, G. Pisano, G. Polenta, D. Prêle, R. Puddu, D. Rambaud, P. Ringegni, G. E. Romero, M. Salatino, A. Schillaci, C. G. Scóccola, S. Spinelli, M. Stolpovskiy, F. Suarez, A. Tartari, J.-P. Thermeau, P. Timbie, S. A. Torchinsky, M. Tristram, V. Truongcanh, C. Tucker, G. Tucker, S. Vanneste, D. Viganò, N. Vittorio, F. Voisin, B. Watson, F. Wicek

Author Affiliations +

Proceedings Volume 10708, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX; 107082I (2018) https://doi.org/10.1117/12.2313256
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

Abstract

QUBIC, the Q & U Bolometric Interferometer for Cosmology, is a novel ground-based instrument that aims to measure the extremely faint B-mode polarisation anisotropy of the cosmic microwave background at intermediate angular scales (multipoles of 𝑙 = 30 − 200). Primordial B-modes are a key prediction of Inflation as they can only be produced by gravitational waves in the very early universe. To achieve this goal, QUBIC will use bolometric interferometry, a technique that combines the sensitivity of an imager with the immunity to systematic effects of an interferometer. It will directly observe the sky through an array of back-to-back entry horns whose beams will be superimposed using a cooled quasioptical beam combiner. Images of the resulting interference fringes will be formed on two focal planes, each tiled with transition-edge sensors, cooled down to 320 mK. A dichroic filter placed between the optical combiner and the focal planes will select two frequency bands (centred at 150 GHz and 220 GHz), one frequency per focal plane. Polarization modulation will be achieved using a cold stepped half-wave plate (HWP) and polariser in front of the sky-facing horns.

The full QUBIC instrument is described elsewhere^1,2,3,4; in this paper we will concentrate in particular on simulations of the optical combiner (an off-axis Gregorian imager) and the feedhorn array. We model the optical performance of both the QUBIC full module and a scaled-down technological demonstrator which will be used to validate the full instrument design. Optical modelling is carried out using full vector physical optics with a combination of commercial and in-house software. In the high-frequency channel we must be careful to consider the higher-order modes that can be transmitted by the horn array. The instrument window function is used as a measure of performance and we investigate the effect of, for example, alignment and manufacturing tolerances, truncation by optical components and off-axis aberrations. We also report on laboratory tests carried on the QUBIC technological demonstrator in advance of deployment to the observing site in Argentina.

Citation Download Citation

C. O'Sullivan, D. Burke, D. Gayer, J. D. Murphy, S. Scully, M. De Leo, M. De Petris, A. Mattei, A. Zullo, A. Mennella, M. Zannoni, N. Bleurvacq, C. Chapron, J.-Ch. Hamilton, M. Piat, P. Ade, G. Amico, D. Auguste, J. Aumont, S. Banfi, G. Barbarán, P. Battaglia, E. Battistelli, A. Baù, B. Bélier, D. Bennett, L. Bergé, J.-Ph. Bernard, M. Bersanelli, M.-A. Bigot-Sazy, J. Bonaparte, J. Bonis, G. Bordier, E. Bréelle, E. Bunn, D. Buzi, A. Buzzelli, F. Cavaliere, P. Chanial, R. Charlassier, F. Columbro, G. Coppi, A. Coppolecchia, F. Couchot, R. D'Agostino, G. D’Alessandro, P. de Bernardis, G. De Gasperis, A. Di Donato, L. Dumoulin, A. Etchegoyen, A. Fasciszewski, C. Franceschet, M. M. Gamboa Lerena, B. García, X. Garrido, M. Gaspard, A. Gault, M. Gervasi, M. Giard, Y. Giraud-Héraud, M. Gómez Berisso, M. González, M. Gradziel, L. Grandsire, E. Guerrard, D. Harari, V. Haynes, S. Henrot-Versillé, D. T. Hoang, F. Incardona, E. Jules, J. Kaplan, A. Korotkov, C. Kristukat, L. Lamagna, S. Loucatos, T. Louis, A. Lowitz, V. Lukovic, R. Luterstein, B. Maffei, S. Marnieros, S. Masi, A. May, M. McCulloch, M. C. Medina, L. Mele, S. Melhuish, L. Montier, L. M. Mundo, J. A. Murphy, E. Olivieri, A. Paiella, F. Pajot, A. Passerini, H. Pastoriza, A. Pelosi, C. Perbost, O. Perdereau, F. Pezzotta, F. Piacentini, L. Piccirillo, G. Pisano, G. Polenta, D. Prêle, R. Puddu, D. Rambaud, P. Ringegni, G. E. Romero, M. Salatino, A. Schillaci, C. G. Scóccola, S. Spinelli, M. Stolpovskiy, F. Suarez, A. Tartari, J.-P. Thermeau, P. Timbie, S. A. Torchinsky, M. Tristram, V. Truongcanh, C. Tucker, G. Tucker, S. Vanneste, D. Viganò, N. Vittorio, F. Voisin, B. Watson, and F. Wicek "Simulations and performance of the QUBIC optical beam combiner", Proc. SPIE 10708, Millimeter, Submillimeter, and Far-Infrared Detectors and Instrumentation for Astronomy IX, 107082I (9 July 2018); https://doi.org/10.1117/12.2313256

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available