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Piat, M.; Battistelli, E.; Baù, A.; Bennett, D.; Bergé, L.; Bernard, J.-P.; de Bernardis, P.; Bigot-Sazy, M.-A.; Bordier, G.; Bounab, A.; Bréelle, E.; Bunn, E. F.; Calvo, M.; Charlassier, R.; Collin, S.; Cruciani, A.; Curran, G.; Dumoulin, L.; Gault, A.; Gervasi, M.; Ghribi, A.; Giard, M.; Giordano, C.; Giraud-Héraud, Y.; Gradziel, M.; Guglielmi, L.; Hamilton, J.-C.; Haynes, V.; Kaplan, J.; Korotkov, A.; Landé, J.; Maffei, B.; Maiello, M.; Malu, S.; Marnieros, S.; Martino, J.; Masi, S.; Montier, L.; Murphy, A.; Nati, F.; O'Sullivan, C.; Pajot, F.; Parisel, C.; Passerini, A.; Peterzen, S.; Piacentini, F.; Piccirillo, L.; Pisano, G.; Polenta, G.; Prêle, D.; Romano, D.; Rosset, C.; Salatino, M.; Schillaci, A.; Sironi, G.; Sordini, R.; Spinelli, S.; Tartari, A.; Timbie, P.; Tucker, G.; Vibert, L.; Voisin, F.; Watson, R. A.; Zannoni, M. (2009). QUBIC: the Q&U Bolometric Interferometer for Cosmology. JOURNAL OF LOW TEMPERATURE PHYSICS, 167(5-6), 872–878.
Abstract: The primordial B-mode polarisation of the Cosmic Microwave Background is the imprints of the gravitational wave background generated by inflation. Observing the B-mode is up to now the most direct way to constrain the physics of the primordial Universe, especially inflation. To detect these B-modes, high sensitivity is required as well as an exquisite control of systematics effects. To comply with these requirements, we propose a new instrument called QUBIC (Q and U Bolometric Interferometer for Cosmology) based on bolometric interferometry. The control of systematics is obtained with a close-packed interferometer while bolometers cooled to very low temperature allow for high sensitivity. We present the architecture of this new instrument, the status of the project and the self-calibration technique which allows accurate measurement of the instrumental systematic effects.
Programme: 915
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Kurat G., Hoppe P., Walter J., Engrand C. & Maurette M. (1994). Oxygen isotopes in spinels from Antarctic micrometeorites. Meteoritics, 29, 487.
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Duhamel G. (1993). The Dissostichus eleginoides Fishery in division 58.5.1 (Kerguelen Islands). Bachelor's thesis, , .
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Dufumier H. & Trampert J. (1997). Contribution of Seismic Tomography in Moment-Tensor Inversions Using Teleseismic Surface-Wave Spectra. Bulletin of the seismological society of america, 87(1), 114–122.
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Gros V., Bonsang B., Martin D., Novelli P.C. & Kazan V. (1999). Short term carbon monoxide measurements at Amsterdam island: estimations of biomass burning emissions rates. Chemosphere global change science, 1, 163–172.
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Charlassier, R.; Hamilton, J.-Ch.; Bréelle, É.; Ghribi, A.; Giraud-Héraud, Y.; Kaplan, J.; Piat, M.; Prêle, D. (2009). An efficient phase-shifting scheme for bolometric additive interferometry. 0935-4956, 497(3), 963–971.
Abstract: Context. Most upcoming CMB polarization experiments will use direct imaging to search for primordial gravitational waves through the B-modes. Bolometric interferometry is an appealing alternative to direct imaging that combines the advantages of interferometry in terms of systematic effects handling and those of bolometric detectors in terms of sensitivity.
Aims. We calculate the signal from a bolometric interferometer in order to investigate its sensitivity to the Stokes parameters paying particular attention to the choice of the phase shifting scheme applied to the input channels in order to modulate the signal.
Methods. The signal is expressed as a linear combination of the Stokes parameter visibilities whose coefficients are functions of the phase shifts.
Results. We show that the signal to noise ratio on the reconstructed visibilities can be maximized provided the fact that the phase shifting scheme is chosen in a particular way called “coherent summation of equivalent baselines”. As a result, a bolometric interferometer is competitive with an imager having the same number of horns, but only if the coherent summation of equivalent baselines is performed. We confirm our calculations using a Monte-Carlo simulation. We also discuss the impact of the uncertainties on the relative calibration between bolometers and propose a way to avoid this systematic effect.
Programme: 915
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Bolshakova O.V., Borovkova O.K., Borokov Y.I., Kleimenova N.G. & Bitterly J. (1994). Magnetic storm on March 13, 89: The structure of extremely disturbed magnetosphere obtained from geomagnetic pulsations Pc 5. Geomagnetism and aeronomy, 34, 492–500.
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Yiou F., Raisbeck G.M., Baumgartner S., Beer J., Hammer C., Johnsen S., Jouzel J., Kubik P.W., Lestringuez J., Stievenard M., Suter & Yiou P. (1997). 10Be in the greenland Ice Core Project ice core at Summit Greenland. J. Geophys. Res., 102(c12), 26783–26794.
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Putaud J.P. (1993). Le sulfure de diméthyle d'origine océanique: Flux, produits d'oxygénation atmosphériques et influence sur la concentration de noyaux..
Abstract: Thèse, Université de Paris VII
Programme: 146
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Purchet M., Melieres M.A., Pinglot J.F. & Heintzenberg J. (1996). Estimation of Chernobyl deposition in high latitudes or high altitudes by 137 Cs measurements in snow..
Abstract: Unesco Int.Academic Conference. Ten years after the Chernobyl Catastrophe. Minsk, Belarus
Programme: 265
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