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A high inductance kHz resonator with a quality factor larger than 106

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6 Author(s)
Falferi, P. ; Centro di Fisica degli Stati Aggregati CNR‐ITC and INFN, Gruppo Collegato di Trento, Sezione di Padova, I‐38050 Povo, Trento, Italy ; Cerdonio, M. ; Franceschini, L. ; Macchietto, R.
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Electrical LC resonators with superconducting coils of ≊3.5 H inductance, operating in the frequency range 250–1500 Hz with quality factors up to Q≊1.6×106 are presented here. The coil has a reduced, ≪100 pF, stray capacitance and is housed in a superconducting case. Measurements are made with a low coupling SQUID readout. Some possible applications of the device are briefly discussed.

Published in:

Review of Scientific Instruments  (Volume:65 ,  Issue: 9 )