Abstract
A highly sensitive galvanometer operating at liquid-nitrogen temperature for direct and low-frequency current measurements was developed on the basis of a HTSC SQUID. The direct-current sensitivity of the galvanometer is approximately 0.5 nA at an internal resistance of about 20 Ω. Its energy resolution in the white noise region is 2 × 10−21 J/Hz.
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Uchaikin, S.V., Hiep, L.H. Ceramic HTSC SQUID-based galvanometer. J Supercond 5, 251–254 (1992). https://doi.org/10.1007/BF00617625
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DOI: https://doi.org/10.1007/BF00617625