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Crosstalk in a KID Array Caused by the Thickness Variation of Superconducting Metal

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Abstract

The work presented in this paper is focused on the improvement of the kinetic detectors used on NIKA2 instrument (New IRAM KID array 2). Based on the simulation and low temperature measurements, it aims at showing how the variations of the superconducting metal corrupt the frequency comb of the kinetic Inductance detectors (KID) in the frequency range (between 1 and 3 GHz), i.e., how the superconducting metal inhomogeneity induces the resonance-to-resonance cross-coupling which deteriorates the homogeneity of the resonance quality factor and the frequency resonance separation. Solutions are then proposed to fight against the effect of these metallic variations when designing the KID array.

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Acknowledgments

This work is supported by the LabEx FOCUS and carried out under the project NIKA2 (New IRAM KID Array 2).

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Correspondence to A. Adane Jr..

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Adane, A., Boucher, C., Coiffard, G. et al. Crosstalk in a KID Array Caused by the Thickness Variation of Superconducting Metal. J Low Temp Phys 184, 137–141 (2016). https://doi.org/10.1007/s10909-016-1490-3

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Keywords

  • Kinetic inductance detectors
  • Superconducting
  • Metal thickness
  • Cross-coupling
  • Crosstalk
  • Astronomical instrument
  • Manufacturing process