TES-Based X-ray Microcalorimeter Performances Under AC Bias and FDM for Athena

H. Akamatsu (Corresponding Author), L. Gottardi, C.P. de Vries, J. S. Adams, S. R. Bandler, M. P. Bruijn, J. A. Chervenak, M. E. Eckart, F. M. Finkbeiner, J. R. Gao, J. W. den Herder, R. den Hartog, H. Hoevers, R. E. Kelley, P. Khosropanah, C. A. Kilbourne, J. van der Kuur, S. J. Lee, A. J. van den Linden, F. S. PorterK. Ravensberg, J. E. Sadleir, S. J. Smith, T. Suzuki, E. J. Wassell, Mikko Kiviranta

    Research output: Contribution to journalArticleScientificpeer-review

    14 Citations (Scopus)


    Athena is a European X-ray observatory, scheduled for launch in ∼ 2028. Athena will employ a high-resolution imaging spectrometer called X-ray integral field unit (X-IFU), consisting of an array of ∼ 4000 transition edge sensor (TES) microcalorimeter pixels. For the readout of X-IFU, we are developing frequency domain multiplexing, which is the baseline readout system. In this paper, we report on the performance of a TES X-ray calorimeter array fabricated at Goddard Space Flight Center (GSFC) at MHz frequencies for the baseline of X-IFU detector. During single-pixel AC bias characterization, we measured X-ray energy resolutions (at 6 keV) of about 2.9 eV at both 2.3 and 3.7 MHz. Furthermore, in the multiplexing mode, we measured X-ray energy resolutions of about 2.9 eV at 1.3 and 1.7 MHz.

    Original languageEnglish
    Pages (from-to)436-442
    JournalJournal of Low Temperature Physics
    Issue number1-2
    Publication statusPublished - 1 Jul 2016
    MoE publication typeA1 Journal article-refereed


    • Athena
    • Frequency domain multiplexing
    • Transition edge sensors
    • X-ray microcalorimeter


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