Demonstration of MHz frequency domain multiplexing readout of 37 transition edge sensors for high-resolution x-ray imaging spectrometers

H. Akamatsu (Corresponding Author), D. Vaccaro, L. Gottardi, J. Van Der Kuur, C. P. De Vries, Mikko Kiviranta, K. Ravensberg, M. D'Andrea, E. Taralli, M. De Wit, M. P. Bruijn, P. Van Der Hulst, R. H. Den Hartog, B. J. Van Leeuwen, A. J. Van Der Linden, A. J. McCalden, K. Nagayoshi, A. C.T. Nieuwenhuizen, M. L. Ridder, S. VisserP. Van Winden, J. R. Gao, R. W.M. Hoogeveen, B. D. Jackson, J. W.A. Den Herder

Research output: Contribution to journalArticleScientificpeer-review

Abstract

We report on the development and demonstration of MHz frequency domain multiplexing (FDM) technology to readout arrays of cryogenic transition edge sensor (TES) x-ray microcalorimeters. In our FDM scheme, TESs are AC biased at different resonant frequencies in the low MHz range through an array of high-Q LC resonators. The current signals of all TESs are summed at superconducting quantum interference devices (SQUIDs). We have demonstrated multiplexing for a readout of 31 pixels using room temperature electronics, high-Q LC filters, and TES arrays developed at SRON, and SQUID arrays from VTT. We repeated this on a second setup with 37 pixels. The summed x-ray spectral resolutions @ 5.9 keV are Δ E 31 pix MUX = 2.14 ± 0.03 eV and Δ E 37 pix MUX = 2.23 ± 0.03 eV. The demonstrated results are comparable with other multiplexing approaches. There is potential to further improve the spectral resolution, to increase the number of multiplexed TESs, and to open up applications for TES x-ray microcalorimeters.

Original languageEnglish
Article number182601
JournalApplied Physics Letters
Volume119
Issue number18
DOIs
Publication statusPublished - 2 Nov 2021
MoE publication typeA1 Journal article-refereed

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