Improvements of the 10 V CENAM Josephson Voltage Standard to reach a standard uncertainty at 1 nV level

Aviles, David; Navarrete, Enrique; Hernandez, Dionisio

doi:10.1109/cpem.2012.6250663

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2013

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“…The software allows the JVS output voltage to be set in order to have a voltage difference lower than 100 nV, by selecting the step number and the microwave frequency. A more detailed description of the improvements of the CENAM JVS is presented in [4].…”

Section: Comparison Setupmentioning

confidence: 99%

Direct Comparison of Josephson Voltage Standards at 10 V Between BIPM and CENAM

Aviles

Navarrete

Hernandez

et al. 2013

IEEE Trans. Instrum. Meas.

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A direct comparison of Josephson voltage standards at 10 V between the Bureau International des Poids et Mesures (BIPM) and the Centro Nacional de Metrología (CENAM), México, was carried out in September 2011. This comparison is part of the BIPM key comparisons (BIPM.EM-K10.b) and took place in the new DC Voltage Laboratory of CENAM. Both systems were very stable during the comparison, and the type "A" uncertainty was very low. The relative voltage difference between the two quantum standards was −6 parts in 10 11 (−0.6 nV), with a combined uncertainty of 7 parts in 10 11 (0.7 nV). Index Terms-DC voltage measurement, DC voltage standard measurements, Josephson voltage standard (JVS), JVS comparison, standards comparison.

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Section: Comparison Setupmentioning

confidence: 99%