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Towards Ultra-Low-Noise MoAu Transition Edge Sensors

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Abstract

We report initial measurements on our first MoAu transition edge sensors (TESs). The TESs formed from a bilayer of 40 nm of Mo and 106 nm of Au showed transition temperatures of about 320 mK, higher than identical TESs with a MoCu bilayer which is consistent with a reduced electron transmission coefficient between the bilayer films. We report measurements of thermal conductance in the 200 nm thick silicon nitride SiN x support structures at this temperature, TES dynamic behaviour and current noise measurements.

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Acknowledgements

This work was supported in part by ESA TRP Contract No. 22359/09/NL/CP. We are also very grateful to colleagues working on that contract within the Astronomy Instrumentation Group, Cardiff University, the Space Research Organization of the Netherlands, the National University of Ireland, Maynooth and the Space Science and Technology Department of Rutherford Appleton Laboratory for numerous stimulating discussions.

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Authors and Affiliations

  1. Detector and Optical Physics Group, Cavendish Laboratory, University of Cambridge, J. J. Thomson Avenue, Cambridge, CB3 0HE, UK

    D. J. Goldie, A. V. Velichko, D. M. Glowacka & S. Withington

Authors
  1. D. J. Goldie
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  2. A. V. Velichko
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  3. D. M. Glowacka
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  4. S. Withington
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Correspondence to D. J. Goldie.

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Goldie, D.J., Velichko, A.V., Glowacka, D.M. et al. Towards Ultra-Low-Noise MoAu Transition Edge Sensors. J Low Temp Phys 167, 248–253 (2012). https://doi.org/10.1007/s10909-012-0575-x

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  • DOI: https://doi.org/10.1007/s10909-012-0575-x

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