Comparison of Different Mo/Au TES Designs for Radiation Detectors

Abstract

We report on the fabrication and characterization of Mo/Au-based transition-edge sensors (TES), intended to be used in X-ray detectors. We have performed complete dark characterization using IV curves, complex impedance and noise measurements at different bath temperatures and biases. Devices with two designs, different sizes and different membranes have been characterized, some of them with a central bismuth absorber. This has allowed extraction of the relevant parameters of the TES, analyses of their standard behavior and evaluation of their prospects.

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Acknowledgements

Work financed by the Spanish Ministerio de Economía y Competitividad (MINECO, projects ESP2014-59306-JIN, ESP2014-53672-C3-2-P, ESP2016-76683-C3-2-R), the European Space Agency (ESA, CTP Contract “Optimization of a European TES array”) and the European Commission (H2020 project AHEAD: Integrated Activities for the high energy astrophysics domain”). Personnel from ICMAB acknowledge financial support from MINECO, through the Severo Ochoa Programme for Centres of Excellence in R&D (SEV-2015-04969). RMJ wishes to thank MINECO for her FPI contract. We also thank PTB for providing the SQUIDs.

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Correspondence to Carlos Pobes.

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Pobes, C., Fàbrega, L., Camón, A. et al. Comparison of Different Mo/Au TES Designs for Radiation Detectors. J Low Temp Phys 193, 282–287 (2018). https://doi.org/10.1007/s10909-018-1936-x

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Keywords

  • Cryogenic detectors
  • Transition-edge sensors
  • Microcalorimeters