Bolometer arrays development in the DCMB French collaboration

M. Piat (1) , Y. Atik , B. Bélier (2) , Alain Benoit (3) , L. Bergé (4) , A. Bounab (5) , E. Bréelle (6) , P. Camus (7) , S. Collin (4) , F. X. Désert (8) , L. Dumoulin (9) , C. Evesque (10) , H. Geoffray (11) , M. Giard (5) , C. Hoffmann (3) , Yun Jin , G. Klisnick , S. Marnieros (4) , Alessandro Monfardini (3) , F. Pajot , D. Prêle (6) , M. Redon , D. Santos (12) , D. Stanescu (4) , G. Sou , F. Voisin (6)

1 APC - Cosmologie
2 IEF - Institut d'électronique fondamentale
3 NEEL - HELFA - Hélium : du fondamental aux applications
4 CSNSM - Centre de Spectrométrie Nucléaire et de Spectrométrie de Masse
5 CESR - Centre d'étude spatiale des rayonnements
6 APC (UMR_7164) - AstroParticule et Cosmologie
7 NEEL - Cryo - Cryogénie
8 LAOG - Laboratoire d'Astrophysique de Grenoble
9 CSNSM PS1
10 IAS - Institut d'astrophysique spatiale
11 CNES - Centre National d'Études Spatiales [Toulouse]
12 LPSC - Laboratoire de Physique Subatomique et de Cosmologie

Bolometers cooled to very low temperature are currently the most sensitive detectors for low spectral resolution detection of millimetre and sub-millimetre wavelengths. The best performances of the state-of-the-art bolometers allow to reach sensitivities below the photon noise of the Cosmic Microwave Background for example. Since 2003, a french R&D effort called DCMB ("Developpement Concerte de Matrices de Bolometres") has been organised between different laboratories to develop large bolometers arrays for astrophysics observations. Funded by CNES and CNRS, it is intended to get a coherent set of competences and equipments to develop very cold bolometers arrays by microfabrication. Two parallel developments have been made in this collaboration based on the NbSi alloy either semi-conductive or superconducting depending on the proportion of Nb. Multiplexing schemes have been developed and demonstrated for these two options. I will present the latest developments made in the DCMB collaboration and future prospects.

Domaines: Instrumentations et Détecteurs [physics.ins-det]

M. Piat, Y. Atik, B. Bélier, Alain Benoit, L. Bergé, et al.. Bolometer arrays development in the DCMB French collaboration. Proceedings of SPIE, the International Society for Optical Engineering, 2008, Millimeter and Submillimeter Detectors and Instrumentation for Astronomy IV, 7020, pp.70200G. ⟨10.1117/12.789703⟩. ⟨in2p3-00860344⟩