Search results for "vision."

The TES-based cryogenic anticoincidence detector for IXO: First results from large area prototypes

2010

The technique which combines high resolution spectroscopy with imaging capability is a powerful tool to extract fundamental information in X-ray Astrophysics and Cosmology. TES (Transition Edge Sensors)-based microcalorimeters match at best the requirements for doing fine spectroscopy and imaging of both bright (high count rate) and faint (poor signal-to-noise ratio) sources. For this reason they are considered among the most promising detectors for the next high energy space missions and are being developed for use on the focal plane of the IXO (International X-ray Observatory) mission. In order to achieve the required signal-to-noise ratio for faint or diffuse sources it is necessary to r…

Baseline design of the thermal blocking filters for the X-IFU detector on board ATHENA

2014

ATHENA is an advanced X-ray observatory designed by a large European consortium to address the science theme "Hot and Energetic Universe" recently selected by ESA for L2 – the second Large-class mission within the Cosmic Vision science program (launch scheduled in 2028). One of the key instruments of the mission is the X-ray Integral Field Unit (X-IFU), an array of Transition Edge Sensor (TES) micro-calorimeters with high energy resolution (2.5 eV @ 6 keV) in the energy range 0.2÷12 keV, operating at the focal plane of a large effective area high angular resolution (5" HEW) grazing incidence X-ray telescope. The X-IFU operates at temperatures below 100 mK and thus requires a sophisticated c…

Thermal modelling of the ATHENA X-IFU filters

2018

Copyright 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. The X-IFU instrument of the ATHENA mission requires a set of thermal filters to reduce the photon shot noise onto its cryogenic detector and to protect it from molecular contamination. A set of five filters, operating at different nominal temperatures corresponding to the cryostat shield temperatures, is currently baselined. The knowledge of the actual filter temperature profi…

Radio frequency shielding of thin aluminized plastic filters investigated for the ATHENA X-IFU detector

2018

Copyright 2018 Society of Photo-Optical Instrumentation Engineers (SPIE). One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. The X-ray Integral Field Unit (X-IFU) is one of the two detectors of the ATHENA astrophysics space mission approved by ESA in the Cosmic Vision 2015-2025 Science Programme. The X-IFU consists of a large array of transition edge sensors (TES) micro-calorimeters covering a field of view of 5' diameter, sensitive in the energy range 0.2-12 keV, and providing a spectral resolution…

The focal plane assembly for the Athena X-ray Integral Field Unit instrument

2016

This paper summarizes a preliminary design concept for the focal plane assembly of the X-ray Integral Field Unit on the Athena spacecraft, an imaging microcalorimeter that will enable high spectral resolution imaging and point-source spectroscopy. The instrument's sensor array will be a ~ 3840-pixel transition edge sensor (TES) microcalorimeter array, with a frequency domain multiplexed SQUID readout system allowing this large-format sensor array to be operated within the thermal constraints of the instrument's cryogenic system. A second TES detector will be operated in close proximity to the sensor array to detect cosmic rays and secondary particles passing through the sensor array for off…

Cover Feature: Electrochemical Installation of CFH 2 −, CF 2 H−, CF 3 −, and Perfluoroalkyl Groups into Small Organic Molecules (Chem. Rec. 9/2021)

2021

Déclaration et vérification des créances. Délai pour effectuer la déclaration définitive de créances fiscales déclarées à titre provisionnel

2012

International audience; (Com., 9 février 2010, n° 08-22.054, F-D, Trésorier principal de Chaumont c/ M. X., Gaz. Pal. 2-3 juill. 2010, p. 32, note E. Le Corre-Broly)

Déclaration et vérification des créances. Délai d'établissement définitif des créances fiscales. Notion de procédure administrative d'établissement d…

2018

International audience; (Com. 25 oct. 2017, n° 16-18.938, arrêt n° 1303 F-P+B+I, Comptable chargé du recouvrement c/ Mme Liliane V. ès qual. et a., D. 2017. 2150 ; Rev. sociétés 2017. 738, obs. L. C. Henry ; Gaz. Pal. 16 janv. 2018, p. 74, note P.-M. Le Corre ; Com. 25 oct. 2017, n° 16-18.940, arrêt n° 1305 F-D, Comptable chargé du recouvrement c/ Mme Liliane V. ès qual. et a., Com. 25 oct. 2017, n° 16-18.942, arrêt n° 1306 F-D, Comptable chargé du recouvrement c/ Mme Liliane V. ès qual. et a.)

Déclaration et vérification des créances. Fixation du délai d'établissement définitif des créances de Sécurité sociale

2018

International audience; (Com. 25 oct. 2017, n° 16-15.784, arrêt n° 1307 F-P+B+I, Mme Dumoulin, ès qual., c/ Caisse générale de sécurité sociale de Guyane, D. 2017. 2150)

Déclaration et vérification des créances. Déclaration à titre provisionnel de créances de l'URSSAF

2020

International audience; (Com. 11 déc. 2019, n° 18-18.665, arrêt n° 908 F-P+B, Sté Éco bati bois et a. c/ URSSAF Aquitaine, D. 2020. 7)