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Performance of a Low-Parasitic Frequency-Domain Multiplexing Readout

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Frequency-domain multiplexing is a readout technique for transition-edge sensor bolometer arrays used on modern cosmic microwave background experiments, including the SPT-3G receiver. Here, we present design details and performance measurements for a low-parasitic frequency-domain multiplexing readout. Reducing the parasitic impedance of the connections between cryogenic components provides a path to improve both the crosstalk and noise performance of the readout. Reduced crosstalk will in turn allow higher-multiplexing factors. We have demonstrated a factor of two improvement in parasitic resistance compared to SPT-3G hardware. Reduced parasitics also permits operation of lower-resistance bolometers optimized for improved readout noise performance. We demonstrate that a module in the prototype system has comparable readout noise performance to an SPT-3G module when operated with dark TES bolometers in the laboratory.

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  1. 1.

    A.N. Bender et al., Proc. SPIE. 10708, 1070803 (2018). https://doi.org/10.1117/12.2312426

  2. 2.

    D. Barron et al., Proc. SPIE. 9153, 915335 (2014). https://doi.org/10.1117/12.2055611

  3. 3.

    B. Reichborn-Kjennerud et al., Proc. SPIE. 7741, 77411C (2010). https://doi.org/10.1117/12.857138

  4. 4.

    M. Hazumi et al., J. Low Temp. Phys. 194(5–6), 443 (2019). https://doi.org/10.1007/s10909-019-02150-5

  5. 5.

    K. Abazjian et al. for the CMB-S4 collaboration. arXiv:1610.02743

  6. 6.

    R.A. Hijmering, R. den Hartog, M. Ridder, A.J. van der Linden, J. van der Kuur, J.R. Gao, B. Jackson, Proc. SPIE 9914, 99141C (2016). https://doi.org/10.1117/12.2231714

  7. 7.

    A.N. Bender et al., Proc. SPIE 9153, 91531A (2014). https://doi.org/10.1117/12.2054949

  8. 8.

    T. de Haan, G. Smecher, M. Dobbs, Proc SPIE. 8452, 84520E (2012). https://doi.org/10.1117/12.925658

  9. 9.

    A.N. Bender, et al., J. Low Temp. Phys. (2019). https://doi.org/10.1007/s10909-019-02280-w

  10. 10.

    J.S. Avva et al., J. Low Temp. Phys. 193(3–4), 547 (2018). https://doi.org/10.1007/s10909-018-1965-5

  11. 11.

    M.A. Dobbs et al., Rev. Sci. Instrum. 83(7), 073113 (2012). https://doi.org/10.1063/1.4737629

  12. 12.

    A.N. Bender et al., Proc. SPIE 9914, 99141D (2016). https://doi.org/10.1117/12.2232146

  13. 13.

    K.D. Irwin, G.C. Hilton, Transition-Edge Sens. (2005). https://doi.org/10.1007/10933596_3

  14. 14.

    J. Clarke, A.I. Braginski, The SQUID Handbook (Wiley, Hoboken, 2004)

  15. 15.

    Metglas, Inc., Subsidiary of Hitachi Metals America, ltd, Conway, SC, http://www.metglas.com

  16. 16.

    Amuneal Manufacturing Corp., Philadelphia, PA, http://www.amuneal.com

  17. 17.

    A.E. Lowitz, A.N. Bender, M.A. Dobbs, A.J. Gilbert, Proc. SPIE 10708, 107081D (2018). https://doi.org/10.1117/12.2311984

  18. 18.

    Chase Research Cryogenics, Sheffield, UK, http://www.chasecryogenics.com

  19. 19.

    W. Everett et al., J. Low Temp. Phys. 193(5–6), 1085 (2018). https://doi.org/10.1007/s10909-018-2057-2

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Work at the University of Chicago is supported by the National Science Foundation through Grant PLR-1248097. Work at Argonne National Laboratory is supported by UChicago Argonne LLC, Operator of Argonne National Laboratory (Argonne). Argonne, a U.S. Department of Energy Office of Science Laboratory, is operated under Contract No. DE-AC02-06CH11357. The McGill authors acknowledge funding from the Natural Sciences and Engineering Research Council of Canada, Canadian Institute for Advanced Research, and the Fonds de recherche du Québec Nature et technologies.

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Correspondence to A. E. Lowitz.

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Lowitz, A.E., Bender, A.N., Barry, P. et al. Performance of a Low-Parasitic Frequency-Domain Multiplexing Readout. J Low Temp Phys (2020). https://doi.org/10.1007/s10909-020-02384-8

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  • Frequency-domain multiplexing
  • Transition-edge sensors
  • Cosmic microwave background