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Proceedings Paper

Optimising the multiplex factor of the frequency domain multiplexed readout of the TES-based microcalorimeter imaging array for the X-IFU instrument on the Athena x-ray observatory
Author(s): J. van der Kuur; L. G. Gottardi; H. Akamatsu; B. J. van Leeuwen; R. den Hartog; D. Haas; M. Kiviranta; B. J. Jackson
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Paper Abstract

Athena is a space-based X-ray observatory intended for exploration of the hot and energetic universe. One of the science instruments on Athena will be the X-ray Integrated Field Unit (X-IFU), which is a cryogenic X-ray spectrometer, based on a large cryogenic imaging array of Transition Edge Sensors (TES) based microcalorimeters operating at a temperature of 100mK. The imaging array consists of 3800 pixels providing 2.5 eV spectral resolution, and covers a field of view with a diameter of of 5 arc minutes.

Multiplexed readout of the cryogenic microcalorimeter array is essential to comply with the cooling power and complexity constraints on a space craft. Frequency domain multiplexing has been under development for the readout of TES-based detectors for this purpose, not only for the X-IFU detector arrays but also for TES-based bolometer arrays for the Safari instrument of the Japanese SPICA observatory.

This paper discusses the design considerations which are applicable to optimise the multiplex factor within the boundary conditions as set by the space craft. More specifically, the interplay between the science requirements such as pixel dynamic range, pixel speed, and cross talk, and the space craft requirements such as the power dissipation budget, available bandwidth, and electromagnetic compatibility will be discussed.

Paper Details

Date Published: 19 July 2016
PDF: 9 pages
Proc. SPIE 9905, Space Telescopes and Instrumentation 2016: Ultraviolet to Gamma Ray, 99055R (19 July 2016); doi: 10.1117/12.2232830
Show Author Affiliations
J. van der Kuur, SRON Netherlands Institute for Space Research (Netherlands)
L. G. Gottardi, SRON Netherlands Institute for Space Research (Netherlands)
H. Akamatsu, SRON Netherlands Institute for Space Research (Netherlands)
B. J. van Leeuwen, SRON Netherlands Institute for Space Research (Netherlands)
R. den Hartog, SRON Netherlands Institute for Space Research (Netherlands)
D. Haas, SRON Netherlands Institute for Space Research (Netherlands)
M. Kiviranta, VTT (Finland)
B. J. Jackson, SRON Netherlands Institute for Space Research (Netherlands)


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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