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

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)

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

Keywords

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

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