Details

Autor(en) / Beteiligte

• van Assendelft, E. C.
• Cho, H.-M.
• Corbin, J.
• Kuentsner, S.
• Li, D.
• Phipps, A.
• Rapidis, N.
• Singh, J.
• Wells, K.
• Irwin, K. D.

Titel

Measurements of Dc SQUID Damping Effects on Superconducting Resonant Circuits

Ist Teil von

• IEEE transactions on applied superconductivity, 2023-08, Vol.33 (5), p.1-6

Ort / Verlag

New York: IEEE

Erscheinungsjahr

2023

Link zum Volltext

• IEEE_Xplore

Quelle

IEEE Electronic Library (IEL)

Beschreibungen/Notizen

• We present experimental measurements of SQUID-induced damping effects on strongly coupled, lumped-element resonators in the 500kHz-1 MHz frequency range. While dc SQUIDs are commonly used for sensitive readout of electromagnetic signals such as in lumped-element axion dark matter searches, coupling a dc SQUID to a resonant circuit modifies the circuit's resonance frequency, quality factor, noise, and impedance. These parameters have a direct impact on the science reach of axion dark matter detectors, making it important to understand SQUID damping contributions. We describe a helium dip probe and two-stage SQUID readout scheme used to probe SQUID damping effects. Measurements from this setup inform the design and operation of both future test platforms as well as next-generation dark-matter experiments.