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Proceedings Paper

Preliminary thermal architecture of the X-IFU instrument dewar
Author(s): Ivan Charles; Christophe Daniel; Jérome André; Lionel Duband; Jean-Marc Duval; Roland den Hartog; Kazuhisa Mitsuda; Keisuke Shinozaki; Henk van Weers; Noriko Y. Yamasaki
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Paper Abstract

The ESA Athena mission will implement 2 instruments to study the hot and energetic universe. The X-ray Integral Field Unit (X-IFU) will provide spatially resolved high resolution spectroscopy. This high energy resolution of 2.5 eV at 7 keV could be achieved thanks to TES (Transition Edge Sensor) detectors that need to be cooled to very low temperature. To obtain the required 50 mK temperature level, a careful design of the cryostat and of the cooling chain including different technologies in cascade is needed. The preliminary cryogenic architecture of the X-IFU instrument that fulfils the TES detector thermal requirements is described. In particular, the thermal design of the detector focal plane assembly (FPA), that uses three temperature stages (from 2 K to 50 mK) to limit the thermal loads on the lowest temperature stage, is described. The baseline cooling chain is based on European and Japanese mechanical coolers (Stirling, Pulse tube and Joule Thomson coolers) that precool a sub Kelvin cooler made of a 3He sorption cooler coupled with a small ADR (Adiabatic Demagnetization Refrigerator). Preliminary thermal budgets of the X-IFU cryostat are presented and discussed regarding cooling chain performances.

Paper Details

Date Published: 18 July 2016
PDF: 20 pages
Proc. SPIE 9905, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray, 99052J (18 July 2016); doi: 10.1117/12.2232710
Show Author Affiliations
Ivan Charles, Univ. Grenoble Alpes (France)
Christophe Daniel, CNES (France)
Jérome André, CNES (France)
Lionel Duband, Univ. Grenoble Alpes (France)
Jean-Marc Duval, Univ. Grenoble Alpes (France)
Roland den Hartog, Space Research Institute of the Netherlands (Netherlands)
Kazuhisa Mitsuda, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)
Keisuke Shinozaki, Research and Development Directorate, Japan Aerospace Exploration Agency (Japan)
Henk van Weers, Space Research Institute of the Netherlands (Netherlands)
Noriko Y. Yamasaki, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (Japan)


Published in SPIE Proceedings Vol. 9905:
Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray
Jan-Willem A. den Herder; Tadayuki Takahashi; Marshall Bautz, Editor(s)

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