@article{543491ed4f8f4f3f8ab998503a6e06a0,
title = "Progress in the Development of Frequency-Domain Multiplexing for the X-ray Integral Field Unit on Board the Athena Mission",
abstract = "Frequency-domain multiplexing (FDM) is the baseline readout system for the X-ray Integral Field Unit on board the Athena mission. Under the FDM scheme, TESs are coupled to a passive LC filter and biased with alternating current (AC bias) at MHz frequencies. Using high-quality-factor LC filters and room-temperature electronics developed at SRON and low-noise two-stage SQUID amplifiers provided by VTT, we have recently demonstrated good performance with the FDM readout of Mo/Au TES calorimeters with Au/Bi absorbers. We have achieved a performance requested for the demonstration model with the single-pixel AC bias (ΔE=1.8eV) and nine-pixel multiplexing (ΔE=2.6eV) modes. We have also demonstrated 14-pixel multiplexing with an average energy resolution of 3.3 eV, which is limited by nonfundamental issues related to FDM readout in our laboratory setup.",
keywords = "Athena, Transition-edge sensors, X-IFU, X-ray astronomy, X-ray calorimeters",
author = "H. Akamatsu and L. Gottardi and {van der Kuur}, J. and {de Vries}, {C. P.} and Bruijn, {M. P.} and Chervenak, {J. A.} and M. Kiviranta and {van den Linden}, {A. J.} and Jackson, {B. D.} and A. Miniussi and K. Ravensberg and K. Sakai and Smith, {S. J.} and N. Wakeham",
note = "Funding Information: The authors would like to thank Martijn Schoemans, Dick Boersma, Marcel van Litsenburg, Patrick van Winden and Bert-Joost van Leeuwen for their precious/continuous help. The authors also thank an anonymous referee for constructive comments. SRON is supported financially by NWO, the Netherlands Organization for Scientific Research. Funding Information: The authors would like to thank Martijn Schoemans, Dick Boersma, Marcel van Litsenburg, Patrick van Winden and Bert-Joost van Leeuwen for their precious/continuous help. The authors also thank an anonymous referee for constructive comments. SRON is supported financially by NWO, the Netherlands Organization for Scientific Research. Publisher Copyright: {\textcopyright} 2020, Springer Science+Business Media, LLC, part of Springer Nature. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.",
year = "2020",
month = may,
day = "1",
doi = "10.1007/s10909-020-02351-3",
language = "English",
volume = "199",
pages = "737--744",
journal = "Journal of Low Temperature Physics",
issn = "0022-2291",
publisher = "Springer",
number = "3-4",
}