QUBIC Technical Design Report

Abstract

QUBIC is an instrument aiming at measuring the B mode polarisation anisotropies at medium scales angular scales (30-200 multipoles). The search for the primordial CMB B-mode polarization signal is challenging, because of many difficulties: smallness of the expected signal, instrumental systematics that could possibly induce polarization leakage from the large E signal into B, brighter than anticipated polarized foregrounds (dust) reducing to zero the initial hope of finding sky regions clean enough to have a direct primordial B-modes observation. The QUBIC instrument is designed to address all aspects of this challenge with a novel kind of instrument, a Bolometric Interferometer, combining the background-limited sensitivity of Transition-Edge-Sensors and the control of systematics allowed by the observation of interference fringe patterns, while operating at two frequencies to disentangle polarized foregrounds from primordial B mode polarization. Its characteristics are described in details in this Technological Design Report.

arXiv comment139 pages ; high resolution version can be found on the qubic website (http://qubic.in2p3.fr/QUBIC/Home.html) minor changes : update author list & affiliations ; correct title

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Cited by in corpus (7)

• QUBIC I: Overview and ScienceProgram
• Absolute calibration of the polarisation angle for future CMB $B$-mode experiments from current and future measurements of the Crab nebula
• QUBIC: Exploring the primordial Universe with the Q\&U Bolometric Interferometer
• QUBIC IV: Performance of TES Bolometers and Readout Electronics
• QUBIC VIII: Optical design and performance
• QUBIC III: Laboratory Characterization
• Systematic effects induced by Half Wave Plate precession into Cosmic Microwave Background polarization measurements