Abstract
We describe the design and use of a simple RF-SQUID preamplifier for measurements involving vibrating wire resonators. For typical vibrating wires with a resonance frequency approaching 1 kHz, amplification factors of 106 to 107 are readily achievable together with an increase in the signal to noise ratio of over an order of magnitude.
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Bradley, D.I., Hayes, W.M. An RF-SQUID Amplifier System for Use with Vibrating Wire Resonators. Journal of Low Temperature Physics 119, 703–713 (2000). https://doi.org/10.1023/A:1004689830846
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DOI: https://doi.org/10.1023/A:1004689830846