Single Pixel Performance of a 32 x 32 Ti/Au TES Array With Broadband X-Ray Spectra

Journal article (2021)

Authors

Matteo D'Andrea SRON Netherlands Institute for Space Research
E. Taralli SRON Netherlands Institute for Space Research
Ruud W. M. Hoogeveen SRON Netherlands Institute for Space Research
J.R. Gao SRON Netherlands Institute for Space Research, ImPhys/Optics - AS
Hiroki Akamatsu SRON Netherlands Institute for Space Research
L Gottardi SRON Netherlands Institute for Space Research
K. Nagayoshi SRON Netherlands Institute for Space Research
K. Ravensberg SRON Netherlands Institute for Space Research
M. L. Ridder SRON Netherlands Institute for Space Research
D. Vaccaro SRON Netherlands Institute for Space Research
C. P. De Vries SRON Netherlands Institute for Space Research
Martin de Wit SRON Netherlands Institute for Space Research
Research Group
ImPhys/Optics (AS) (TU Delft)
Copyright: © 2021 Matteo D'andrea, Emanuele Taralli, Hiroki Akamatsu, Luciano Gottardi, Kenichiro Nagayoshi, Kevin Ravensberg, Marcel L. Ridder, Davide Vaccaro, Cor P. De Vries, Martin De Wit, Ruud W.M. Hoogeveen, J.R. Gao
DOI
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https://doi.org/10.1109/TASC.2021.3065303
Energy resolution TES X-IFU Energy calibration MXS X-ray detectors
More Info
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Published Date

2021

Language

English

Reuse Rights

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Faculty

Applied Sciences

Department

ImPhys/Imaging Physics

Research Group

ImPhys/Optics

Abstract

We are developing a kilo-pixels Ti/Au TES array as a backup option for Athena X-IFU. Here we report on single-pixel performance of a 32 × 32 array operated in a Frequency Division Multiplexing (FDM) readout system, with bias frequencies in the range 1-5 MHz. We have tested the pixels response at several photon energies, by means of a 55Fe radioactive source (emitting Mn-Kα at 5.9 keV) and a Modulated X-ray Source (MXS, providing Cr-Kα at 5.4 keV and Cu-Kα at 8.0 keV). First, we report the procedure used to perform the detector energy scale calibration, usually achieving a calibration accuracy better than ∼0.5 eV in the 5.4-8.9 keV energy range. Then, we present the measured energy resolution at the different energies (best single pixel performance: ΔEFWHM = 2.40 ± 0.09 eV @ 5.4 keV; 2.53 ± 0.10 eV @ 5.9 keV; 2.78 ± 0.16 eV @ 8.0 keV), investigating also the performance dependency from the pixel bias frequency and the count rate. Thanks to long background measurements (∼1 d), we finally detected also the Al-Kα line at 1.5 keV, generated by fluorescence inside the experimental setup. We analyzed this line to obtain a first assessment of the single-pixel performance also at low energy (ΔEFWHM = 1.91 eV ± 0.21 eV @ 1.5 keV), and to evaluate the linearity of the detector response in a large energy band (1.5-8.9 keV).