Williams, J M; Patel, P D; Holubar, T*; Good, J* (2014) Cryogenic current comparator bridge with dual SQUID detectors. In: 29th Conference on Precision Electromagnetic Measurement (CPEM 2014), 24-29 August 2014, Rio de Janeiro, Brazil.
Full text not available from this repository.Abstract
The cryogenic current comparator (CCC) resistance ratio bridge provides a high accuracy over a wide range of practical resistance values. Its performance is critically dependent on the choice of detector used to achieve a voltage null in the bridge. The necessary combination of low input current and voltage noise is not widely available in commercial instruments.
A SQUID is a competitive device as a voltage null detector when matched to the resistors being compared. This paper describes a CCC bridge for resistors in the range 1 to 10 k
, as well a quantised Hall resistance plateaux, employing two SQUIDS, one for current balance and one for voltage balance.
Item Type: | Conference or Workshop Item (UNSPECIFIED) |
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Keywords: | Resistance measurement, SQUID, cryogenic current comparator |
Subjects: | Electromagnetics Electromagnetics > Electrical Quantum Standards |
Identification number/DOI: | 10.1109/CPEM.2014.6898575 |
Last Modified: | 02 Feb 2018 13:13 |
URI: | http://eprintspublications.npl.co.uk/id/eprint/6405 |
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