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You searched on: Topic Area: Quantum Electrical Measurements

Displaying records 31 to 40 of 47 records.
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31. 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

32. 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

33. 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

34. 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

35. 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

36. 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

37. Operating Margins for a Pulse-Driven Josephson Arbitrary Waveform Synthesizer Using a Ternary Bit-Stream Generator
Topic: Quantum Electrical Measurements
Published: 4/1/2009
Authors: Ernest Houtzager, Samuel Paul Benz, Helko vanden Brom
Abstract: We describe measurements with a pulse-driven Josephson arbitrary waveform synthesizer (JAWS) that uses a ternary arbitrary bit-stream generator as the bias source. This system is meant to be used as an AC Josephson voltage standard (ACJVS). From thes ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=33059

38. Ultra-high resolution alpha particle spectroscopy using calorimetry
Topic: Quantum Electrical Measurements
Published: 9/23/2008
Authors: Robert D Horansky, Joel Nathan Ullom, James A Beall, Gene C Hilton, Kent D. Irwin, Don Dry, Beth Hastings, Stephen Lamont, Clifford R Rudy, Michael W Rabin
Abstract: Calorimetry has been used since the late 1700?s to measure the heat output of physical processes ranging from chemical reactions to the respiration of organisms . Calorimetry is performed by measuring the temperature change caused by heat release int ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32940

39. Improvements in the NIST Johnson Noise Thermometry System
Topic: Quantum Electrical Measurements
Published: 6/9/2008
Authors: Samuel Paul Benz, Horst Rogalla, Rod White, Jifeng Qu, Paul David Dresselhaus, Wes L Tew, Sae Woo Nam
Abstract: We have developed a Johnson noise thermometry system that is calibrated by precision waveforms synthesized with a quantum-accurate voltage noise source (QVNS). Significant improvements to the QVNS and the cross-correlation measurement electronics hav ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32883

40. Precision Differential Sampling Measurements of Low-Frequency Voltages Synthesized with an AC Programmable Josephson Voltage Standard
Topic: Quantum Electrical Measurements
Published: 6/9/2008
Authors: Alain Rufenacht, Charles J Burroughs, Samuel Paul Benz, Paul David Dresselhaus, Bryan C Waltrip, Thomas L Nelson
Abstract: Sampling is a promising technique to compare the stepwise-approximated sine waves synthesized by an AC Programmable Josephson Voltage Standard to the sinusoidal voltages of a secondary source at low frequencies (a few hundred Hz or less). This paper ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32900



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