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DOE OSTI · 2283691

Epoxy IR Filters for Superconducting Resonators

Spahn, G.·Kurinsky, N.·Lewis, S.·Bowring, D.·Hollister, M.
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Abstract

Infrared radiation leakage through dielectrics in coaxial cabling can create unwanted quasiparticles in superconducting resonators if allowed to reach devices unattenuated. Modern experimental setups commonly incorporate epoxy-based filter blocks on readout and control lines in order to mitigate this effect; however, most of these multi-channel designs require specialized mounting hardware. Here, this investigation details the design and construction of single-channel inline infrared filters, and finds that their installation in the readout system for an aluminum resonator increased its quality factor by an average of 12% across a range of operating temperatures and powers. The option to incorporate general-purpose inline filters instead of designing custom filter blocks and mounts should prove more convenient for many newer experiments.

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Spahn, G., Kurinsky, N., Lewis, S., Bowring, D., Hollister, M.. 2022-07-20. Epoxy IR Filters for Superconducting Resonators. https://doi.org/10.1007/s10909-022-02778-w

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