AC/DC Characterization of a Ti/Au TES with Au/Bi Absorber for X-ray Detection

Taralli, E.; Pobes, C.; Khosropanah, P.; Fabrega, L.; Camón, A.; Gottardi, L.; Nagayoshi, K.; Ridder, M.L.; Bruijn, M. P.; Gao, J.R.

doi:10.1007/s10909-020-02390-w

AC/DC Characterization of a Ti/Au TES with Au/Bi Absorber for X-ray Detection

Title

AC/DC Characterization of a Ti/Au TES with Au/Bi Absorber for X-ray Detection

Author

Taralli, E. (SRON Netherlands Institute for Space Research)
Pobes, C. (University of Zaragoza)
Khosropanah, P. (SRON Netherlands Institute for Space Research)
Fabrega, L. (Institut de Ciència de Materials deBarcelona, Barcelona)
Camón, A. (University of Zaragoza)
Gottardi, L. (SRON Netherlands Institute for Space Research)
Nagayoshi, K. (SRON Netherlands Institute for Space Research)
Ridder, M.L. (SRON Netherlands Institute for Space Research)
Bruijn, M. P. (SRON Netherlands Institute for Space Research)
Gao, J.R. (TU Delft ImPhys/Optics; SRON Netherlands Institute for Space Research)

Date

2020

Abstract

Transition-edge sensors (TESs) are used as very sensitive thermometers in microcalorimeters aimed at detection of different wavelengths. In particular, for soft X-ray astrophysics, science goals require very high-resolution microcalorimeters which can be achieved with TESs coupled to suitable absorbers. For many applications, there is also need for a high number of pixels which typically requires multiplexing in the readout stage. Frequency-domain multiplexing (FDM) is a common scheme and is the baseline proposed for the ATHENA mission. FDM requires biasing the TES in AC at MHz frequencies. Recently, there has been reported degradation in performances under AC with respect to DC bias. In order to assess the performances of TESs to be used with FDM, it is thus of great interest to compare the performances of the same device both under AC bias and DC bias. This requires two different measurement set-ups with different processes for making the characterization. We report in this work the preliminary results of a single-pixel characterization performed on a TiAu TES under AC and afterwards under DC bias in different facilities. Extraction of dynamical parameters and noise performances are compared in both cases as a first stage for further AC/DC comparison of these devices.

Subject

AC bias and DC bias
Complex impedance
Transition-edge sensor

To reference this document use:

http://resolver.tudelft.nl/uuid:e269e96e-4faa-482f-92bd-0442bc506fed

DOI

https://doi.org/10.1007/s10909-020-02390-w

Embargo date

2021-02-24

ISSN

0022-2291

Source

Journal of Low Temperature Physics, 199 (1-2), 102-109