We present a characterization of the sensitivity of TES X-ray micro-calorimeters to environmental conditions under frequency-domain multiplexing (FDM) readout. In the FDM scheme, each TES in a readout chain is in series with a LC band-pass filter and AC biased with an independent carrier at MHz range. Using TES arrays, cold readout circuitry and warm electronics fabricated at SRON and SQUIDs produced at VTT Finland, we characterize the sensitivity of the detectors to bias voltage, bath temperature and magnetic field. We compare our results with the requirements for the Athena X-IFU instrument, showing the compliance of the measured sensitivities. We find in particular that FDM is intrinsically insensitive to the magnetic field because of TES design and AC readout.
@article{arxiv.2208.10875,
title = {Susceptibility study of TES micro-calorimeters for X-ray spectroscopy under FDM readout},
author = {Davide Vaccaro and Hiroki Akamatsu and Luciano Gottardi and Jan van der Kuur and Emanuele Taralli and Martin de Wit and Marcel P. Bruijn and Roland den Hartog and Mikko Kiviranta and Anton J. van der Linden and Kenichiro Nagayoshi and Kevin Ravensberg and Marcel L. Ridder and Sven Visser and Brian D. Jackson and Jian-Rong Gao and Ruud W. M. Hoogeveen and Jan-Willem A. den Herder},
journal= {arXiv preprint arXiv:2208.10875},
year = {2022}
}
Comments
This paper has been accepted for publication in Journal of Low Temperature Physics