A 10 V programmable Josephson voltage standard and its applications for voltage metrology
IR@NPL: CSIR-National Physical Laboratory, New Delhi
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| Title |
A 10 V programmable Josephson voltage standard and its applications for voltage metrology
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| Creator |
Tang, Y.
Ojha, V. N. Schlamminger, S. Ruefenacht, A. Burroughs, C. J. Dresselhaus, P. D. Benz, S. P. |
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| Subject |
Instruments/ Instrumentation
Applied Physics/Condensed Matter |
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| Description |
The concept of a programmable Josephson voltage standard (PJVS) was first proposed in 1997. Since then a significant amount of research and development work has been devoted to the fabrication of the programmable Josephson junction array and its deployment in a voltage standard system. This paper reports the recent development of a 10 V PJVS system at the National Institute of Standards and Technology (NIST) and its voltage metrology applications. The superior stability of the voltage step of the new 10 V PJVS enables it to perform the same tasks as the conventional Josephson voltage standard (JVS) that uses hysteretic voltage steps and to improve the efficiency and effectiveness of a JVS direct comparison. For the first time, a comparison between a conventional JVS and the NIST 10 V PJVS was performed in order to verify the performance of the NIST 10 V PJVS. The mean difference between the two systems at 10 V was found to be -0.49 nV with a combined standard uncertainty of 1.32 nV (k = 1) or a relative combined standard uncertainty of 1.32 parts in 10(10). Automatic comparisons between the 10 V PJVS and a 2.5 V PJVS at 1.018 V were performed to monitor the long term accuracy and stability of the 2.5 V PJVS and to support the NIST electronic kilogram experiment. By matching the voltages of the two PJVS systems during a comparison, the type B uncertainty can be minimized to a negligible level. The difference between the two PJVS at 1.018 V was found to be -0.38 nV with a combined standard uncertainty of 0.68 nV (k = 1) or a relative combined standard uncertainty of 6.7 parts in 10(10). Issues encountered during the PJVS comparison and potential challenges for 10 V applications are also discussed.
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| Publisher |
IOP Publishing
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| Date |
2012-12
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| Type |
Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://npl.csircentral.net/3704/1/A%2010%20V%20programmable%20Josephson%20voltage%20standard.pdf
Tang, Y. and Ojha, V. N. and Schlamminger, S. and Ruefenacht, A. and Burroughs, C. J. and Dresselhaus, P. D. and Benz, S. P. (2012) A 10 V programmable Josephson voltage standard and its applications for voltage metrology. Metrologia, 49 (6). pp. 635-643. ISSN 0026-1394 |
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| Relation |
http://npl.csircentral.net/3704/
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