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14th International Workshop on Low Temperature Particle Detection (LTD), Heidelberg : Allemagne (2011)
Characterization of NbSi TES Bolometers: Preliminary Results
J. Martino1, D. Prêle1, M. Piat1, F. Voisin1, E. Bréelle1, B. Belier2, G. Bordier1, S. Marnieros3, F. Pajot4, Y. Atik4
(2012)

We present preliminary results on characterisation of voltage biased superconducting bolometers with an NbSi alloy sensor. I(V) curves as well as complex impedance and noise measurements are carried out in a dilution fridge with a pulse tube as a first stage cooler. SQUIDs polarization and addressing are controlled by a cold ASIC in which a SiGe amplifier has been implemented. First characterisations were done on full membrane bolometers and show a noise level of about 10(-16) W/root Hz. Those detectors are developed for the QUBIC experiment, a B-modes telescope that will be deployed in Antactica in 2013
1:  APC - UMR 7164 - AstroParticule et Cosmologie
2:  IEF - Institut d'électronique fondamentale
3:  CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse
4:  IAS - Institut d'astrophysique spatiale
APC - Cosmologie et Gravitation
CSNSM PS1
Physics/Physics/Instrumentation and Detectors

Physics/Condensed Matter/Superconductivity
TES – Bolometers – NbSi – Cosmic microwave background – Noise – Complex impedance