Development of TiAu TES x-ray calorimeters for the X-IFU on ATHENA space observatory

P. Khosropanah, E. Taralli, L. Gottardi, C. P. De Vries, K. Nagayoshi, M. L. Ridder, H. Akamatsu, M. P. Bruijn, J. R. Gao

    Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

    5 Citations (Scopus)


    SRON is developing X-ray transition edge sensor (TES) calorimeters arrays, as a backup technology for X-IFU instrument on the ATHENA space observatory. These detectors are based on a superconducting TiAu bilayer TES with critical temperature of 100 mK on a 1 μm thick SiN membrane with Au or Au/Bi absorbers. Number of devices have been fabricated and measured using a Frequency Division Multiplexing (FDM) readout system with 1-5 MHz bias frequencies. We measured IV curves, critical temperature, thermal conductance, noise and also X-ray energy resolution at number of selected bias points. So far our best calorimeter shows 3.9 eV X-ray resolution at 6 keV. Here we present a summary of our results and the latest status of development of X-ray calorimeters at SRON.

    Original languageEnglish
    Title of host publicationProceedings of SPIE : Space Telescopes and Instrumentation 2018
    Subtitle of host publicationUltraviolet to Gamma Ray
    EditorsS. Nikzad, J.-W.A. Herder, den, K. Nakazawa
    ISBN (Print)9781510619517
    Publication statusPublished - 2018
    EventSPIE astronomical telescopes and instrumentation 2018 - Austin, United States
    Duration: 10 Jun 201815 Jun 2018


    ConferenceSPIE astronomical telescopes and instrumentation 2018
    CountryUnited States


    • ATHENA
    • calorimeters
    • SiN membrane
    • TES arrays
    • transition edge sensor
    • X-IFU
    • X-ray spectrometer


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