TES Bolometer Arrays for the QUBIC B-Mode CMB Experiment

MARNIEROS, S., FOR THE QUBIC COLLABORATION (127 AUTORES); GARCÍA, B.

JOURNAL OF LOW TEMPERATURE PHYSICS

SPRINGER/PLENUM PUBLISHERS

Lugar: New York; Año: 2020 vol. 199 p. 955 - 961

0022-2291

QUBIC (Q & U Bolometric Interferometer for Cosmology) is an internationalground-based experiment dedicated in the measurement of the polarized fluctuations of theCosmic Microwave Background (CMB). It is based on bolometric interferometry, an origi-nal detection technique which combine the immunity to systematic effects of an interferom-eter with the sensitivity of low temperature incoherent detectors. QUBIC will be deployedin Argentina, at the Alto Chorrillos mountain site near San Antonio de los Cobres, in theSalta province.The QUBIC detection chain consists in 2048 NbSi Transition Edge Sensors (TESs)cooled to 350mK.The voltage-biased TESs are read out with Time Domain Multiplexingbased on Superconducting QUantum Interference Devices (SQUIDs) at 1 K and a novelSiGe Application-Specific Integrated Circuit (ASIC) at 60 K allowing to reach an unprece-dented multiplexing (MUX) factor equal to 128.The QUBIC experiment is currently being characterized in the lab with a reduced num-ber of detectors before upgrading to the full instrument. I will present the last results of thischaracterization phase with a focus on the detectors and readout system