We analyze a thin-film cryogenic current comparator (CCC) intended to be used in ac measurements. Our analysis shows that by calibrating the dc ratio error of the thin-film CCC against a conventional CCC, it can be used up to 10 kHz as a sensitive and highly accurate current comparator. We have fabricated a practical 1:1 planar CCC integrated with a low-noise SQUID magnetometer. The preliminary experiments obtained from the 1:1 comparator are described.
|Journal||IEEE Transactions on Instrumentation and Measurement|
|Publication status||Published - 2002|
|MoE publication type||A1 Journal article-refereed|
Seppä, H., Satrapinski, A., Kiviranta, M., & Virkki, V. (2002). Thin-film cryogenic current comparator. IEEE Transactions on Instrumentation and Measurement, 48(2), 365-369. https://doi.org/10.1109/19.769602