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

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

D'andrea, Matteo (SRON Netherlands Institute for Space Research)
Taralli, Emanuele (SRON Netherlands Institute for Space Research)
Akamatsu, Hiroki (SRON Netherlands Institute for Space Research)
Gottardi, Luciano (SRON Netherlands Institute for Space Research)
Nagayoshi, Kenichiro (SRON Netherlands Institute for Space Research)
Ravensberg, Kevin (SRON Netherlands Institute for Space Research)
Ridder, Marcel L. (SRON Netherlands Institute for Space Research)
Vaccaro, Davide (SRON Netherlands Institute for Space Research)
De Vries, Cor P. (SRON Netherlands Institute for Space Research)
De Wit, Martin (SRON Netherlands Institute for Space Research)
Hoogeveen, Ruud W.M. (SRON Netherlands Institute for Space Research)
Gao, J.R. (TU Delft ImPhys/Optics; SRON Netherlands Institute for Space Research)

2021

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).

Energy calibration
energy resolution
MXS
TES
X-IFU
x-ray detectors

http://resolver.tudelft.nl/uuid:03dea8c0-9c2d-4d21-b201-c462ba19318f

https://doi.org/10.1109/TASC.2021.3065303

1051-8223

IEEE Transactions on Applied Superconductivity, 31 (5)

Institutional Repository

journal article

© 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