Study of TES Detector Transition Curve to Optimize the Pixel Design for Frequency-Division Multiplexing Readout

M. L. Ridder*, K. Nagayoshi, M. P. Bruijn, L. Gottardi, E. Taralli, P. Khosropanah, H. Akamatsu, J. van der Kuur, K. Ravensberg, S. Visser, A. C.T. Nieuwenhuizen, J. R. Gao, J. W. den Herder

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)
3 Downloads (Pure)

Abstract

Superconducting transition-edge sensors (TESs) are highly sensitive detectors. Based on the outstanding performance on spectral resolution, the X-ray integral field unit (X-IFU) instrument on-board athena will be equipped with a large array of TES-based microcalorimeters. For optimal performance in terms of the energy resolution, it is essential to limit undesirable nonlinearity effects in the TES detector. Weak-link behavior induced on the TES by superconducting leads is such a nonlinearity effect. We designed and fabricated smart test structures to study the effect of the superconducting leads on the intrinsic transition curve of our TiAu-based TES bilayer. We measured and analyzed the resistance versus temperature transition curves of the test structures. We found relations of long-distance proximity effects with TES length and different lead materials. Based on these results, we can redesign and further optimize our TES-based X-ray detectors.

Original languageEnglish
Pages (from-to)962-967
Number of pages6
JournalJournal of Low Temperature Physics
Volume199
Issue number3-4
DOIs
Publication statusPublished - 2020

Bibliographical note

Accepted Author Manuscript

Keywords

  • Frequency-domain multiplexing
  • Transition-edge sensors
  • Weak link

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