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Operation of NIST Josephson Array Voltage Standards.

Clark A Hamilton1, Charles Burroughs1, Kao Chieh1

  • 1National Institute of Standards and Technology, Boulder, CO 80303.

Journal of Research of the National Institute of Standards and Technology
|February 10, 2017
PubMed
Summary

This study details the NIST-developed Josephson array standard for voltage measurements. It covers practical design, construction, and calibration, assessing error sources for improved accuracy in electrical metrology.

Keywords:
Josephson arrayJosephson junctionsuperconductivityvoltage standard

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Area of Science:

  • Electrical Metrology
  • Quantum Phenomena

Background:

  • The Josephson effect provides a quantum-based method for establishing precise voltage standards.
  • Accurate voltage standards are crucial for scientific research and industrial applications.

Purpose of the Study:

  • To describe the practical implementation of the NIST-developed Josephson array voltage standard.
  • To detail the system's design, construction, and operational parameters.
  • To assess potential error sources for performance optimization.

Main Methods:

  • Discussion of the physical principles and historical development of Josephson effect voltage standards.
  • Detailed explanation of array design and cryoprobe construction.
  • Analysis of bias source requirements and system adjustment procedures.
  • Application of calibration algorithms and error source assessment.

Main Results:

  • The paper provides a comprehensive overview of the NIST Josephson array standard's practical aspects.
  • It outlines the methodologies for achieving optimum performance and calibration.
  • An assessment of error sources is presented to ensure measurement reliability.

Conclusions:

  • The NIST Josephson array standard is a practical and reliable system for voltage metrology.
  • Understanding and mitigating error sources are key to maintaining high accuracy.
  • This work contributes to the advancement of precise voltage measurement techniques.