Absolute Energy Calibration of X-ray TESs with 0.04 eV Uncertainty at 6.4 keV in a Hadron-Beam Environment

H. Tatsuno, W. B. Doriese, D. A. Bennett, C. Curceanu, J. W. Fowler, J. Gard, F. P. Gustafsson, T. Hashimoto, R. S. Hayano, J. P. Hays-Wehle, G. C. Hilton, M. Iliescu, S. Ishimoto, K. Itahashi, M. Iwasaki, K. Kuwabara, Y. Ma, J. Marton, H. Noda, G. C. O’NeilS. Okada, H. Outa, C. D. Reintsema, M. Sato, D. R. Schmidt, H. Shi, K. Suzuki, T. Suzuki, J. Uhlig, J. N. Ullom, E. Widmann, S. Yamada, J. Zmeskal, D. S. Swetz

Research output: Contribution to journalArticlepeer-review

27 Citations (Scopus)


A performance evaluation of superconducting transition-edge sensors (TESs) in the environment of a pion beam line at a particle accelerator is presented. Averaged across the 209 functioning sensors in the array, the achieved energy resolution is 5.2 eV FWHM at Co Kα (6.9 keV) when the pion beam is off and 7.3 eV at a beam rate of 1.45 MHz. Absolute energy uncertainty of ± 0.04 eV is demonstrated for Fe K (6.4 keV) with in-situ energy calibration obtained from other nearby known X-ray lines. To achieve this small uncertainty, it is essential to consider the non-Gaussian energy response of the TESs and thermal cross-talk pile-up effects due to charged particle hits in the silicon substrate of the TES array.

Original languageEnglish
Pages (from-to)930-937
Number of pages8
JournalJournal of Low Temperature Physics
Issue number3-4
Publication statusPublished - 2016 Aug 1


  • Hadronic atom
  • Low-energy tail
  • Transition-edge sensor
  • X-ray energy calibration
  • X-ray response
  • X-ray spectroscopy

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Condensed Matter Physics


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