24 July 2014 The X-ray Integral Field Unit (X-IFU) for Athena
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Abstract
Athena is designed to implement the Hot and Energetic Universe science theme selected by the European Space Agency for the second large mission of its Cosmic Vision program. The Athena science payload consists of a large aperture high angular resolution X-ray optics (2 m2 at 1 keV) and twelve meters away, two interchangeable focal plane instruments: the X-ray Integral Field Unit (X-IFU) and the Wide Field Imager. The X-IFU is a cryogenic X-ray spectrometer, based on a large array of Transition Edge Sensors (TES), offering 2:5 eV spectral resolution, with ~5" pixels, over a field of view of 50 in diameter. In this paper, we present the X-IFU detector and readout electronics principles, some elements of the current design for the focal plane assembly and the cooling chain. We describe the current performance estimates, in terms of spectral resolution, effective area, particle background rejection and count rate capability. Finally, we emphasize on the technology developments necessary to meet the demanding requirements of the X-IFU, both for the sensor, readout electronics and cooling chain.
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Laurent Ravera, Laurent Ravera, Didier Barret, Didier Barret, Jan Willem den Herder, Jan Willem den Herder, Luigi Piro, Luigi Piro, Rodolphe Clédassou, Rodolphe Clédassou, Etienne Pointecouteau, Etienne Pointecouteau, Philippe Peille, Philippe Peille, Francois Pajot, Francois Pajot, Monique Arnaud, Monique Arnaud, Claude Pigot, Claude Pigot, Lionel Duband, Lionel Duband, Christophe Cara, Christophe Cara, Roland H. den Hartog, Roland H. den Hartog, Luciano Gottardi, Luciano Gottardi, Hiroki Akamatsu, Hiroki Akamatsu, Jan van der Kuur, Jan van der Kuur, Henk J. van Weers, Henk J. van Weers, Jelle de Plaa, Jelle de Plaa, Claudia Macculi, Claudia Macculi, Simone Lotti, Simone Lotti, Guido Torrioli, Guido Torrioli, Flavio Gatti, Flavio Gatti, Luca Valenziano, Luca Valenziano, Marco Barbera, Marco Barbera, Xavier Barcons, Xavier Barcons, María Teresa Ceballos, María Teresa Ceballos, Lourdes Fàbrega, Lourdes Fàbrega, José Miguel Mas-Hesse, José Miguel Mas-Hesse, Mathew J. Page, Mathew J. Page, Phillip R. Guttridge, Phillip R. Guttridge, Richard Willingale, Richard Willingale, Stéphane Paltani, Stéphane Paltani, Ludovic Genolet, Ludovic Genolet, Enrico Bozzo, Enrico Bozzo, Gregor Rauw, Gregor Rauw, Etienne Renotte, Etienne Renotte, Jörn Wilms, Jörn Wilms, Christian Schmid, Christian Schmid, } "The X-ray Integral Field Unit (X-IFU) for Athena", Proc. SPIE 9144, Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray, 91442L (24 July 2014); doi: 10.1117/12.2055884; https://doi.org/10.1117/12.2055884
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