Characterization of a Josephson array for pulse-driven voltage standard in a cryocooler

Sosso, A.; Durandetto, Paolo; Trinchera, Bruno; Kieler, Oliver; Behr, R.; Kohlmann, J.

doi:10.1016/j.measurement.2016.09.039

Cited by 10 publications

(8 citation statements)

References 18 publications

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“…The denomination of the pulse-driven technique depends on the domain of application (ACJVS for pure sinewaves generation or QVNS for quantum voltage noise source for a pseudo-random noise source used in electrical based thermometry, see section 4.3). Today, due to the high complexity of these systems, only NIST and PTB are developing JAWS systems, however, they have established close collaborations with several groups [158,159,160,161].…”

Section: Jaws: Pulse Driven Arraysmentioning

confidence: 99%

The ampere and the electrical units in the quantum era

Poirier

Djordjevic

Schopfer

et al. 2019

Comptes Rendus. Physique

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By fixing two fundamental constants from quantum mechanics, the Planck constant h and the elementary charge e, the revised Système International (SI) of units endorses explicitly quantum mechanics. This evolution also highlights the importance of this theory which underpins the most accurate realization of the units. From 20 May 2019, the new definitions of the kilogram and of the ampere, based on fixed values of h and e respectively, will particularly impact the electrical metrology. The Josephson effect (JE) and the quantum Hall effect (QHE), used to maintain voltage and resistance standards with unprecedented reproducibility since 1990, will henceforth provide realizations of the volt and the ohm without the uncertainties inherited from the older electromechanical definitions. More broadly, the revised SI will sustain the exploitation of quantum effects to realize electrical units, to the benefit of end-users. Here, we review the state-of-the-art of these standards and discuss further applications and perspectives.

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Section: Jaws: Pulse Driven Arraysmentioning

confidence: 99%

The ampere and the electrical units in the quantum era

Poirier

Djordjevic

Schopfer

et al. 2019

Comptes Rendus. Physique

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“…However, the overall cryogenic setup is quickly swappable with RF coaxial cable for use with pulse-driven Josephson arrays aimed at the synthesis of high purity waveforms [15]. Fig.…”

Section: B Cryocooler Setupmentioning

confidence: 99%

On the Synthesis of Stepwise Quantum Waves Using a SNIS Programmable Josephson Array in a Cryocooler

Trinchera

Lacquaniti

Sosso

et al. 2017

IEEE Trans. Appl. Supercond.

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This paper presents recent advances in the application of binary-divided 1 V array, consisting of 8192 intrinsically shunted SNIS overdamped Josephson junctions (JJs), for the synthesis of stepwise waves with quantum accuracy. The maximum output voltage is ensured by opportunely driving the subsections of the SNIS array by means of three states biascurrent setpoints to the Shapiro steps n = 0, ±1 or n = ±2, respectively. Reconfigurable digital modular electronics has been designed to bias individually each of the 13 subsections of the SNIS array. A two-stage closed cycle refrigerator equipped with LF and RF electrical lines is employed for cooling-down the SNIS array for temperatures ranging from 3.6 K to above 7 K. Stepwise sine waves with rms amplitude ranging from 1 V to 2 V using the first (n=1) and second (n=2) Shapiro steps, different temperatures and bias-current setpoints have been synthesized up to the kHz range. The synthesized waves have been recorded and analyzed by a high-precision differential sampling system. We report the results of the first characterizations carried out with the new multi-bit current source and an improved version of the sample holder designed to optimize the heat dissipation of the SNIS array for operation in cryocooler setups.

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“…4 The most commonly used method to calibrate the division ratio is to obtain the ratio between actual voltages on the high voltage and low voltage arms of the divider. [5][6][7] In other words, the true voltage values of a high voltage source are obtained by multiplication of the voltages on the low voltage arm with the ratio of the division.…”

Section: Introductionmentioning

confidence: 99%

RETRACTED: Traceability of DC and AC high voltage measurements using voltage divider calibration

Mageed

Al-Enezi

2018

International Journal of Electrical Engineering & Education

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This paper focuses on achieving traceability of high voltage measurements up to 200 kV at the Egyptian National Institute of Standards. The measurement system consists of an AC/DC voltmeter and a universal resistive/capacitive high voltage divider. The voltmeter shows measured voltage values based on the scale factor of the voltage divider. The divider ensures a stable capacitance for AC voltage measurements and an additional resistive parallel path for DC voltage measurements. Both the divider and the voltmeter are calibrated in AC and DC modes. All uncertainty components are taken into account to obtain measured values with an acceptable accuracy. The calibration results in traceability to the national standards, which make measurements using the international system of units. The proposed calibration method is useful for the theory and practice of high voltage measurements in education, industrial applications, and electrical metrology studies.

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Characterization of a Josephson array for pulse-driven voltage standard in a cryocooler

Cited by 10 publications

References 18 publications

The ampere and the electrical units in the quantum era

The ampere and the electrical units in the quantum era

On the Synthesis of Stepwise Quantum Waves Using a SNIS Programmable Josephson Array in a Cryocooler

RETRACTED: Traceability of DC and AC high voltage measurements using voltage divider calibration

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