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Displaying records 11 to 20 of 46 records.
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11. Application of the Josephson effect in electrical metrology
Topic: Quantum Electrical Measurements
Published: 6/1/2009
Authors: Samuel Paul Benz, Blaise Jeanneret
Abstract: Over the last 30 years, metrology laboratories have used the quantum behavior of the Josephson effect to greatly improve voltage metrology. The following article reviews the history and present status of the research and development Josephson voltage ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32961

12. Broadband Josephson Voltage Standards
Topic: Quantum Electrical Measurements
Published: 5/20/2001
Authors: Clark A. Hamilton, Samuel Paul Benz
Abstract: A Josephson junction is a perfect frequency to voltage converter, that is, V=f/K^dj^ where K^dj^ = 483597.9 GHz/V. This unique property has been used to convert a narrow (1 Hz) band 75 GHz reference frequency to a dc voltage standard. Josephson stand ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=30216

13. Cryocooled 10 V Programmable Josephson Voltage Standard
Topic: Quantum Electrical Measurements
Published: 12/11/2014
Authors: Alain Rufenacht, Logan A. Howe, Anna E Fox, Robert E Schwall, Paul David Dresselhaus, Charles J Burroughs, Samuel Paul Benz
Abstract: Implementation of programmable Josephson voltage standard (PJVS) circuits on cryocooler at 4 K is a challenge. The limited cooling power of the cryocoolers has to balance the heat dissipated by the PJVS circuit in order to maintain a stable tempe ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=916564

14. Development of a Four-channel System for Johnson Noise Thermometry
Topic: Quantum Electrical Measurements
Published: 6/13/2010
Authors: Alessio Pollarolo, Jifeng Qu, Horst Rogalla, Paul David Dresselhaus, Samuel Paul Benz
Abstract: Long integration time is necessary to reach low uncertainty when measuring temperature through Johnson Noise Thermometry (JNT). The main goal of the NIST JNT experiment is to achieve a 6 10-6 relative uncertainty in the measurement of the water tripl ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904968

15. Development of a Four-channel System for Johnson Noise Thermometry
Topic: Quantum Electrical Measurements
Published: 12/30/2010
Authors: Alessio Pollarolo, Chiharu Urano, Paul David Dresselhaus, Jifeng Qu, Horst Rogalla, Samuel Paul Benz
Abstract: Long integration time is necessary to reach low uncertainty when measuring temperature through Johnson Noise Thermometry (JNT). The main goal of the NIST JNT experiment is to achieve a 6×10-6 relative uncertainty in the measurement of the water tripl ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905961

16. Development of a Quantum-Voltage-Calibrated Noise Thermometer at NIM
Topic: Quantum Electrical Measurements
Published: 9/11/2013
Authors: Jifeng Qu, Samuel Paul Benz, Jianqiang Zhang, Horst Rogalla, Yang Fu, Alessio Pollarolo, Jintao Zhang
Abstract: A quantum-voltage-calibrated Johnson-noise thermometer was developed at NIM, which measures the Boltzmann constant k through comparing the thermal noise across a 100  sense resistor at the temperature of the triple point water to the comb-lik ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910779

17. Differential Sampling Measurement of a 7 V rms Sine Wave and a Programmable Josephson Voltage Standard
Topic: Quantum Electrical Measurements
Published: 7/1/2012
Authors: Alain Rufenacht, Charles J Burroughs, Samuel Paul Benz, Paul David Dresselhaus
Abstract: A 10 V programmable Josephson voltage standard has enabled sine waves with rms voltages up to 7 V to be accurately measured with differential sampling methods. This paper reviews the challenges and limitations of differential sampling that arise when ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910561

18. Differential sampling measurement of a 7 V rms Sine Wave with a Programmable Josephson Voltage Standard
Topic: Quantum Electrical Measurements
Published: 6/1/2013
Authors: Alain Rufenacht, Charles J Burroughs, Paul David Dresselhaus, Samuel Paul Benz
Abstract: A 10 V programmable Josephson voltage standard has enabled sine waves with voltages up to 7 V rms to be accurately measured with a differential sampling measurement technique. Expanding the voltage range for this technique enables direct calibration ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=911610

19. Direct Comparison of two NIST PJVS systems at 10 V
Topic: Quantum Electrical Measurements
Published: 8/27/2013
Authors: Stephane Solve, Alain Rufenacht, Charles J Burroughs, Samuel Paul Benz
Abstract: Two NIST Programmable Josephson Voltage Standard (PJVS) systems have been directly compared at 10V using different nanovoltmeters at the temperature of the laboratory. These PJVS systems use arrays double-stacked superconducting-niobium Josephson ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=913689

20. Electronic Measurement of the Boltzmann Constant with a Quantum-Voltage-Calibrated Johnson-Noise Thermometer
Topic: Quantum Electrical Measurements
Published: 11/22/2009
Authors: Samuel Paul Benz, D. R White, Jifeng Qu, Horst Rogalla, Weston Leo Tew
Abstract: Currently, the CODATA value of the Boltzmann constant is dominated by a single gas-based-thermometry measurement with a relative uncertainty of 1.8 ձ0^-6. This paper describes an electronic approach to measuring the Boltzmann constant that comp ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901450



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