Cryocooled 10 V Programmable Josephson Voltage Standard

Rüfenacht, Alain; Howe, L.; Fox, Anna E.; Schwall, Robert E.; Dresselhaus, Paul D.; Burroughs, Charles J.; Benz, Samuel P.

doi:10.1109/cpem.2014.6898457

Cited by 8 publications

(6 citation statements)

References 7 publications

(11 reference statements)

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“…The frequency of the microwave bias is always locked to a 10 MHz reference signal from a GPS receiver. Relative agreement at parts in 10 −10 between the NMIJ PJVS system and a conventional liquid-helium-based NMIJ CJVS system has been observed under several conditions [10,25]. A system for the routine calibration service of the Zener voltage standards has also been developed using the NMIJ PJVS system.…”

Section: Nmij Pjvs Array and System Configurationmentioning

confidence: 94%

“…Following the successful implementation of programmable Josephson voltage standards (PJVS) at 10 V in recent years [7][8][9], quantum voltage reference systems based on a non-hysteretic JJ have progressively replaced conventional Josephson voltage standard (CJVS) systems based on metastable, zero-crossing quantum voltage steps as primary voltage standards at the institutes. Further improvement was accomplished by integrating PJVS devices successfully with liquid-free cryogenic mechanical coolers [10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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Direct DC 10 V comparison between two programmable Josephson voltage standards made of niobium nitride (NbN)-based and niobium (Nb)-based Josephson junctions

et al. 2018

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BIPM's new transportable programmable Josephson voltage standard (PJVS) has been used for an on-site comparison at the National Metrology Institute of Japan (NMIJ) and the National Institute of Advanced Industrial Science and Technology (AIST) (NMIJ/AIST, hereafter called just NMIJ unless otherwise noted). This is the first time that an array of niobium-based Josephson junctions with amorphous niobium silicon Nb x Si 1−x barriers, developed by the National Institute of Standards and Technology 4 (NIST), has been directly compared to an array of niobium nitride (NbN)-based junctions (developed by the NMIJ in collaboration with the Nanoelectronics Research Institute (NeRI), AIST). Nominally identical voltages produced by both systems agreed within 5 parts in 10 12 (0.05 nV at 10 V) with a combined relative uncertainty of 7.9 × 10 −11 (0.79 nV). The low side of the NMIJ apparatus is, by design, referred to the ground potential. An analysis of the systematic errors due to the leakage current to ground was conducted for this ground configuration. The influence of a multi-stage low-pass filter installed at the output measurement leads of the NMIJ primary standard was also investigated. The number of capacitances in parallel in the filter and their insulation resistance have a direct impact on the amplitude of the systematic voltage error introduced by the leakage current, even if the current does not necessarily return to ground. The filtering of the output of the PJVS voltage leads has the positive consequence of protecting the array from external sources of noise. Current noise, when coupled to the array, reduces the width or current range of the quantized voltage steps. The voltage error induced by the leakage current in the filter is an order of magnitude larger than the voltage error in the absence of all filtering, even though the current range of steps is significantly decreased without filtering. Bureau International des Poids et Mesures 4 Contribution of the US Government, not subject to copyright.

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Section: Nmij Pjvs Array and System Configurationmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

Direct DC 10 V comparison between two programmable Josephson voltage standards made of niobium nitride (NbN)-based and niobium (Nb)-based Josephson junctions

et al. 2018

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“…intrinsic stability) and range of applications (see section 4). NMIJ/AIST, NIST, and Supracon, have successfully operated PJVS circuits on liquidhelium-free dry cryocoolers [42][43][44]. Fully automated, liquidcryogen-free PJVS systems are available from NIST through the NIST standard reference instrument program 3 and from Supracon 4 .…”

Section: Programmable Josephson Voltage Standardsmentioning

confidence: 99%

Impact of the latest generation of Josephson voltage standards in ac and dc electric metrology

2018

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For decades, the quantum behavior of Josephson junctions has been employed as intrinsic standards for voltage metrology. Conventional dc Josephson voltage standards have been the primary standards for voltage, programmable Josephson voltage standards have been implemented in calibration services and precision measurements, such as the Planck constant, and Josephson arbitrary waveform synthesizers have been employed in ac voltage calibrations and precision measurements of the Boltzmann constant. With the anticipated redefinition of the Système International d'Unités, all types of Josephson voltage standards will become intrinsic standards and equivalent realizations of the unit volt. Here we review the stateof-the art performance, best practices, and current impact of these systems for various applications, with an emphasis on ac voltage metrology. We explain the limitations of each system, especially regarding the many potential systematic errors that affect their accuracy and performance for specific applications.

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“…Another PJVS system run with a cryocooler was also reported by the group of the National Institute of Standards and Technology [14]. We believe that these systems could be a useful and user-friendly tool for such applications.…”

Section: Introductionmentioning

confidence: 74%

Evaluation of Linearity Characteristics in Digital Voltmeters Using a PJVS System With a 10-K Cooler

Maruyama

Takahashi

Katayama

et al. 2015

IEEE Trans. Instrum. Meas.

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We have evaluated the linearity of commercial digital voltmeters (DVMs) using a programmable Josephson voltage standard (PJVS) system. The PJVS system is composed of a 524 288-niobium nitride-based Josephson junction array that has the ability to generate arbitrary output voltages up to 17 V with a resolution of 12 bits. In our system, the junction array is operated in a 10-K compact cooler without a liquid-helium coolant. Up to now, we have succeeded in generating accurate dc voltage levels of up to approximately 13 V using this system. In this paper, we demonstrate our PJVS system as a tool for investigating the linearity characteristics of commercial DVMs, with an accuracy level of 0.1 µV/V or better, and discuss the uncertainty sources in these measurements. Index Terms-DC voltage, digital voltmeter (DVM), Josephson junction array, linearity, mechanical cooler, precision measurements, programmable Josephson voltage standard (PJVS). the development of the resistance calibration system based on the quantumHall effect. He has also been involved in programmable and pulse-driven ac Josephson voltage standards, including the Johnson noise thermometry project. He has served as the Chief of the Quantum Electrical Standards Section since 2010, and the Head of the Electricity and Magnetism Division with NMIJ, AIST, since 2013. He is involved in quantum current standards and metrology triangle experiments, which combine three quantum electrical effects. His current research interests include condensed matter and material physics, and their application to metrology. Dr. Kaneko was a recipient of the 2012 NCSLI Measure Editor's Choice Award.

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Cryocooled 10 V Programmable Josephson Voltage Standard

Cited by 8 publications

References 7 publications

Direct DC 10 V comparison between two programmable Josephson voltage standards made of niobium nitride (NbN)-based and niobium (Nb)-based Josephson junctions

Direct DC 10 V comparison between two programmable Josephson voltage standards made of niobium nitride (NbN)-based and niobium (Nb)-based Josephson junctions

Impact of the latest generation of Josephson voltage standards in ac and dc electric metrology

Evaluation of Linearity Characteristics in Digital Voltmeters Using a PJVS System With a 10-K Cooler

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