دورية أكاديمية
QUBIC VI: Cryogenic half wave plate rotator, design and performance
| العنوان: | QUBIC VI: Cryogenic half wave plate rotator, design and performance |
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| المؤلفون: | D'Alessandro, G., Mele, L., Columbro, F., Amico, G., Battistelli, E. S., de Bernardis, P., Coppolecchia, A., De Petris, M., Grandsire, L., Hamilton, J. -Ch., Lamagna, L., Marnieros, S., Masi, S., Mennella, A., O'Sullivan, C., Paiella, A., Piacentini, F., Piat, M., Pisano, G., Presta, G., Tartari, A., Torchinsky, S. A., Voisin, F., Zannoni, M., Ade, P., Alberro, J. G., Almela, A., Arnaldi, L. H., Auguste, D., Aumont, J., Azzoni, S., Banfi, S., Baù, A., Bélier, B., Bennett, D., Bergé, L., Bernard, J. -Ph., Bersanelli, M., Bigot-Sazy, M. -A., Bonaparte, J., Bonis, J., Bunn, E., Burke, D., Buzi, D., Cavaliere, F., Chanial, P., Chapron, C., Charlassier, R., Cobos Cerutti, A. C., De Gasperis, G., De Leo, M., Dheilly, S., Duca, C., Dumoulin, L., Etchegoyen, A., Fasciszewski, A., Ferreyro, L. P., Fracchia, D., Franceschet, C., Gamboa Lerena, M. M., Ganga, K. M., García, B., García Redondo, M. E., Gaspard, M., Gayer, D., Gervasi, M., 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., Loucatos, S., Louis, T., Maffei, B., Marty, W., Mattei, A., May, A., McCulloch, M., Melo, D., Montier, L., Mousset, L., Mundo, L. M., Murphy, J. A., Murphy, J. D., Nati, F., Olivieri, E., Oriol, C., Pajot, F., Passerini, A., Pastoriza, H., Pelosi, A., Perbost, C., Perciballi, M., Pezzotta, F., Piccirillo, L., Platino, M., Polenta, G., Prêle, D., Puddu, R., Rambaud, D., Rasztocky, E., Ringegni, P., Romero, G. E., Salum, J. M., Schillaci, A., Scóccola, C. G., Scully, S., Spinelli, S., Stankowiak, G., Stolpovskiy, M., Supanitsky, A. D., Thermeau, J. -P., Timbie, P., Tomasi, M., Tucker, C., Tucker, G., Viganò, D., Vittorio, N., Wicek, F., Wright, M., Zullo, A. |
| المساهمون: | G. D'Alessandro, L. Mele, F. Columbro, G. Amico, E.S. Battistelli, P. de Bernardi, A. Coppolecchia, M. De Petri, L. Grandsire, J.-. Hamilton, L. Lamagna, S. Marniero, S. Masi, A. Mennella, C. O'Sullivan, A. Paiella, F. Piacentini, M. Piat, G. Pisano, G. Presta, A. Tartari, S.A. Torchinsky, F. Voisin, M. Zannoni, P. Ade, J.G. Alberro, A. Almela, L.H. Arnaldi, D. Auguste, J. Aumont, S. Azzoni, S. Banfi, A. Baù, B. Bélier, D. Bennett, L. Bergé, J.-. Bernard, M. Bersanelli, M.-. Bigot-Sazy, J. Bonaparte, J. Boni, E. Bunn, D. Burke, D. Buzi, F. Cavaliere, P. Chanial, C. Chapron, R. Charlassier, A.C. Cobos Cerutti, G. De Gasperi, 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. Gille, Y. Giraud-Heraud, M. Gómez Berisso, M. González, M. Gradziel, M.R. Hampel, D. Harari, S. Henrot-Versillé, F. Incardona, E. Jule, J. Kaplan, C. Kristukat, S. Loucato, T. Loui, B. Maffei, W. Marty, A. Mattei, A. May, M. Mcculloch, D. Melo, L. Montier, L. Mousset, L.M. Mundo, J.A. Murphy, J.D. Murphy, F. Nati, E. Olivieri, C. Oriol, F. Pajot, A. Passerini, H. Pastoriza, A. Pelosi, C. Perbost |
| سنة النشر: | 2022 |
| المجموعة: | The University of Milan: Archivio Istituzionale della Ricerca (AIR) |
| مصطلحات موضوعية: | CMBR detector, CMBR experiment, CMBR polarisation, gravitational waves and CMBR polarization, Settore FIS/05 - Astronomia e Astrofisica |
| الوصف: | Setting an upper limit or detection of B-mode polarization imprinted by gravitational waves from Inflation is one goal of modern large angular scale cosmic microwave background (CMB) experiments around the world. A great effort is being made in the deployment of many ground-based, balloon-borne and satellite experiments, using different methods to separate this faint polarized component from the incoming radiation. QUBIC exploits one of the most widely-used techniques to extract the input Stokes parameters, consisting in a rotating half-wave plate (HWP) and a linear polarizer to separate and modulate polarization components. QUBIC uses a step-by-step rotating HWP, with 15 degrees steps, combined with a 0.4 degrees s(-1) azimuth sky scan speed. The rotation is driven by a stepper motor mounted on the cryostat outer shell to avoid heat load at internal cryogenic stages. The design of this optical element is an engineering challenge due to its large 370 mm diameter and the 8K operation temperature that are unique features of the QUBIC experiment. We present the design for a modulator mechanism for up to 370 mm, and the first optical tests by using the prototype of QUBIC HWP (180 mm diameter). The tests and results presented in this work show that the QUBIC HWP rotator can achieve a precision of 0.15 degrees in position by using the stepper motor and custom-made optical encoder. The rotation induces < 5.0 mW (95% C.L) of power load on the 4K stage, resulting in no thermal issues on this stage during measurements. We measure a temperature settle-down characteristic time of 28 s after a rotation through a 15 degrees step, compatible with the scanning strategy, and we estimate a maximum temperature gradient within the HWP of <= 10 mK. This was calculated by setting up finite element thermal simulations that include the temperature profiles measured during the rotator operations. We report polarization modulation measurements performed at 150 GHz, showing a polarization efficiency > 99% (68% C.L.) and a median ... |
| نوع الوثيقة: | article in journal/newspaper |
| اللغة: | English |
| العلاقة: | info:eu-repo/semantics/altIdentifier/wos/WOS:000795597300001; volume:2022; issue:4; firstpage:1; lastpage:26; numberofpages:26; journal:JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS; http://hdl.handle.net/2434/924627Test; info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-85129823977 |
| DOI: | 10.1088/1475-7516/2022/04/039 |
| الإتاحة: | https://doi.org/10.1088/1475-7516/2022/04/039Test http://hdl.handle.net/2434/924627Test |
| حقوق: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.6FC0BB10 |
| قاعدة البيانات: | BASE |
| DOI: | 10.1088/1475-7516/2022/04/039 |
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