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26 April 2024

» arxiv » 1601.3293

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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'Neil ; S. 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 ;
Date:	13 Jan 2016
Abstract:	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 $K_{alpha}$ (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 $pm$0.04 eV is demonstrated for Fe $K_{alpha}$ (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.
Source:	arXiv, 1601.3293
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