Journal of Low Temperature Physics

, Volume 184, Issue 1–2, pp 88–90

Quantum Efficiency Characterization and Optimization of a Tungsten Transition-Edge Sensor for ALPS II


DOI: 10.1007/s10909-015-1408-5

Cite this article as:
Bastidon, N., Horns, D. & Lindner, A. J Low Temp Phys (2016) 184: 88. doi:10.1007/s10909-015-1408-5


The ALPS II experiment, Any Light Particle Search II at DESY in Hamburg, will look for sub-eV mass new fundamental bosons (e.g., axion-like particles, hidden photons, and other weakly interacting sub-eV particles) in the next years by means of a light-shining-through-wall setup. The ALPS II photosensor is a tungsten transition-edge sensor (W-TES) optimized for 1064 nm photons. This TES, operated at 80 mK, has already allowed single infrared photon detections as well as non-dispersive spectroscopy with very low background rates. The demonstrated quantum efficiency for such TES is up to 95 % (1064 nm) as has been already demonstrated by the US National Institute of Standards and Technology. A back-to-back measurement of the ALPS TES quantum efficiency using a calibrated charge-coupled device camera has lead to a first estimation of 30 %. Improvement methods are discussed.


Transition-edge sensor TES Detection efficiency 

Copyright information

© Springer Science+Business Media New York 2015

Authors and Affiliations

  1. 1.Institut für ExperimentaphysikHamburg UniversityHamburgGermany
  2. 2.Deutsches Elektronen-Synchrotron (DESY)HamburgGermany

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