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You searched on: Topic Area: Quantum Electrical Measurements

Displaying records 21 to 30 of 42 records.
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21. Quantum Calibration System for AC Measurement Standards using Inductive Voltage Dividers
Topic: Quantum Electrical Measurements
Published: 7/1/2012
Authors: Thomas Hagen, Ilya Budovsky, Samuel Paul Benz, Charles J Burroughs
Abstract: A pulse driven ac Josephson voltage standard (ACJVS) has been set up at the National Measurement Institute, Australia (NMIA) with the help of the National Institute of Standards and Technology (NIST). The ACJVS forms the basis of a high precision cal ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=910579

22. An electronic measurement of the Boltzmann constant
Topic: Quantum Electrical Measurements
Published: 3/30/2011
Authors: Samuel Paul Benz, Alessio Pollarolo, Jifeng Qu, Horst Rogalla, Chiharu Urano, Weston Leo Tew, Paul David Dresselhaus, D. R White
Abstract: The Boltzmann constant was measured by comparing the Johnson noise of a resistor at the triple point of water with a quantum-based voltage reference signal generated with a superconducting Josephson-junction waveform synthesizer. The measured value ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=907640

23. Reduced Nonlinearity Effect on the Electronic Measurement of the Boltzmann Constant
Topic: Quantum Electrical Measurements
Published: 1/10/2011
Authors: Jifeng Qu, Samuel Paul Benz, Alessio Pollarolo, Horst Rogalla
Abstract: NIST has developed a quantum voltage noise source (QVNS) calibrated Johnson noise thermometer (JNT) to provide a new electronic measurement technique for determining the Boltzmann constant. Improvements in electronics and synthesized noise waveforms ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=905951

24. 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

25. 10 Volt Programmable Josephson voltage standard circuits using NbSi-barrier junctions
Topic: Quantum Electrical Measurements
Published: 10/28/2010
Authors: Paul David Dresselhaus, Mike Elsbury, David Inocencio Olaya, Charles J Burroughs, Samuel Paul Benz
Abstract: Programmable Josephson voltage standard (PJVS) circuits were developed that operate at 16 GHz to 20 GHz with operating margins larger than 1 mA. Two circuit designs were demonstrated each having a total of ~ 300,000 junctions, which were divided into ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906299

26. 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

27. 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

28. Reduced Nonlinearities and Improved Temperature Measurements for the NIST Johnson Noise Thermometer
Topic: Quantum Electrical Measurements
Published: 7/31/2009
Authors: Jifeng Qu, Samuel Paul Benz, Horst Rogalla, D. R White
Abstract: The variance of temperature measurements made with the NIST Johnson noise thermometer has been reduced by use of improved cross-correlation electronics and a unique method for measuring and reducing nonlinearities. The spectral response of the voltag ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902592

29. Nonlinear Behavior of Electronic Components Characterized with Precision Multitones from a Josephson Arbitrary Waveform Synthesizer
Topic: Quantum Electrical Measurements
Published: 6/3/2009
Authors: Samuel Paul Benz, Ryan C. Toonen
Abstract: We have extended the application of quantum-based electrical standards from single frequency calibrations to multi-tone tests that can be used to characterize the nonlinear behavior of electronic components and circuits. Specifically, we have used a ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=33176

30. Application of the Josephson effect in electrical metrology
Topic: Quantum Electrical Measurements
Published: 6/1/2009
Authors: Samuel Paul Benz, B. 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



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