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Optical Efficiency and R(T,I) Measurements of ACTPol TESes Using Time Domain Multiplexing Electronics

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Abstract

We present new data on feedhorn-coupled transition-edge sensor devices fabricated for the second-generation receiver (ACTPol) for the Atacama cosmology telescope (ACT). First, we describe optical efficiency measurements of the latest ACTPol detector wafer, which has a \(86\,\pm 15\,\%\) average optical efficiency. Next, we discuss measurements of the TES resistance as a function of temperature and bias current (\(R(T,I)\)) using the ACTPol time-domain multiplexing electronics. Qualitative agreement between \(R(T,I)\) data at low bias current and the two-fluid model prediction is shown. Using the two-fluid model and low bias current \(R(T,I)\) data, \(\alpha \) and \(\beta \) at our operating bias current are calculated.

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Authors and Affiliations

  1. Department of Physics, Princeton University, Jadwin Hall, Princeton, NJ, 08544, USA

    C. G. Pappas, E. A. Grace, L. A. Page & S. T. Staggs

  2. Department of Physics, Cornell University, Ithaca, NY, 14853, USA

    M. D. Niemack

  3. Goddard Space Flight Center, 8800 Greenbelt Rd, Greenbelt, MD, 20771, USA

    E. J. Wollack

  4. Department of Physics, University of Michigan, 1440 Randall Lab, 450 Church Street, Ann Arbor, MI, 48109-1040, USA

    J. J. McMahon

  5. Quantum Electronics and Photonics Division, National Institute of Standards and Technology, Boulder, CO, 80305, USA

    J. Beall, J. Brevick, H. M. Cho, A. Fox, G. C. Hilton, J. Hubmayr, K. D. Irwin, D. Li, J. P. Nibarger & J. Van Lanen

  6. Department of Physics and Astronomy, University of Pennsylvania, 209 South 33rd Street, Philadelphia, PA, 19104-6396, USA

    M. J. Devlin, J. Klein, M. Lungu & B. L. Schmitt

  7. Department of Astronomy and Astrophysics, University of Toronto, 50 St. George St, Toronto, ON, M5S 3H4, Canada

    L. B. Newburgh

Authors
  1. C. G. Pappas
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  2. J. Beall
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  3. J. Brevick
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  4. H. M. Cho
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  5. M. J. Devlin
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  6. A. Fox
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  7. E. A. Grace
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  8. G. C. Hilton
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  9. J. Hubmayr
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  10. K. D. Irwin
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  11. J. Klein
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  12. D. Li
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  13. M. Lungu
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  14. L. B. Newburgh
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  15. J. P. Nibarger
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  16. M. D. Niemack
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  17. J. J. McMahon
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  18. L. A. Page
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  19. B. L. Schmitt
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  20. S. T. Staggs
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  21. J. Van Lanen
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  22. E. J. Wollack
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Corresponding author

Correspondence to C. G. Pappas.

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Pappas, C.G., Beall, J., Brevick, J. et al. Optical Efficiency and R(T,I) Measurements of ACTPol TESes Using Time Domain Multiplexing Electronics. J Low Temp Phys 176, 749–754 (2014). https://doi.org/10.1007/s10909-013-1066-4

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  • DOI: https://doi.org/10.1007/s10909-013-1066-4

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