J. L. Sauvageot

Optical Characterizations of Polarization-Sensitive Millimeter-Wave Silicon Bolometers

A. Aliane, Émilie Hérault, Laurent Dussopt, L. Rodriguez et autres

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New way to manage high density signal connections and the small power of sub-K cryo-generators

J. L. Sauvageot, A. Olivier, Jean Charbonnier, Xavier de la Broïse et autres

The small power of cryo-generators at sub-K temperature is a strong bottleneck for large sub-K experiments, such as large spatial spectro-imagers for astrophysics, or qubits arrays for quantic computing. It is even very often the limitation to the number of channels of …

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Cryogenic instrumentation based on Silicon technology: from Astrophysics Cryo-Detectors to Quantum computing

J. L. Sauvageot, Xavier de la Broïse, L. Rodriguez, X. Jehl et autres

In this course, we present three R&D programs using cryogenic temperature developped at CEA: X-Ray and Sub-mm detectors for astrophysic and a new promising Si qubits. For each of these, we have had to develop very specific nearby cryo-electronics. The main choices …

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Design, Simulation and Fabrication of Highly Sensitive Cooled Silicon Bolometers for Millimeter-Wave Detection

A. Aliane, O.-A. Adami, Laurent Dussopt, L. Rodriguez et autres

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Listening to the shape of a drum

Fabio Cipriani, J. L. Sauvageot

The aim of this work is to link the quasiconformal geometry of a Euclidean domain $U$ to the spectral properties of its Dirichlet integral $\D$, through the algebra of multipliers $\M(H^{1,2}(U))$ of the Sobolev space. In the main result we prove that …

XMM/Newton view of the merging cluster A3921 preliminary analysis

J. L. Sauvageot, E. Belsole, M. Arnaud, T. J. Ponman

Toward large μ-calorimeters x-ray matrices based on metal-insulator sensors and HEMTs/SiGe cryo-electronics

J. L. Sauvageot, Claude Pigot, Xavier de la Broïse, Thomas Charvolin et autres

The launch of ASTRO-H/ITOMI ,the X-ray Japanese/US mission, in February 2016 with μ-calorimeters based on Metal-Insulator-Sensors (M.I.S) experiment with a 4.5eV spectral resolution, would certainly generate renewed interest on the high impedance M.I.S based on Si P:B. Since 2009 we are involved …

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VizieR Online Data Catalog: XXL Survey: First results (Pierre+, 2016)

M. Pierre, F. Pacaud, C. Adami, Sinan Aliş et autres

Large high impedance silicon μ-calorimeters for x-rays camera: status and perspectives

J. L. Sauvageot, Claude Pigot, Xavier de la Broïse, Alain Le Coguie et autres

In this paper, we present our developments on micro-calorimeter arrays, based on High Impedance Silicon sensors (MIS or resistive TES) micro-calorimeters and GaAS-GaAlAs HEMTs / SiGe cryo-electronics, started 5 years ago. We show the pixel design, the main steps to build a …

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Structure, electrical conductivity, critical superconducting temperature and mechanical properties of TiNxOy thin films

J. Goupy, Philippe Djémia, Stéphanie Pouget, Laurent Belliard et autres

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MIS μ-calorimeters arrays: an alternative to IXO/XMS TES/Squids baseline

A. Aliane, J. L. Sauvageot, Xavier de la Broïse, Claude Pigot et autres

The IXO/XMS instrument baseline is an array of TES sensors. Alternatively, we are now developing a μ- calorimeter array based on Silicon doped sensors. Our strength stands in a very low power consumption at 50 mK, allowing more than 4000 readout channels …

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Merger events with galaxy-gas separation in the hot galaxy cluster A2163

H. Bourdin, Christophe O. Benoist, A. Cappi, S. Maurogordato et autres