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You searched on: Topic Area: Quantum Electrical Measurements

Displaying records 31 to 40 of 42 records.
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31. 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

32. 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

33. Ultra-high resolution alpha particle spectroscopy using calorimetry
Topic: Quantum Electrical Measurements
Published: 9/23/2008
Authors: Robert Daniel 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

34. 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

35. 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

36. AC-DC Transfer Standard Measurements and Generalized Compensation with the AC Josephson Voltage Standard
Topic: Quantum Electrical Measurements
Published: 4/1/2008
Authors: Oliver F kieler, Regis Landim, Samuel Paul Benz, Paul David Dresselhaus, Charles J Burroughs
Abstract: This paper presents ac-dc transfer standard measurements using the NIST pulse-driven ac Josephson voltage standard source. We have investigated the frequency dependence for several output voltages up to 200 mV for frequencies from 2.5 kHz to 100 kHz. ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32616

37. Systematic Error Analysis of Stepwise Approximated AC Waveforms Generated by a Programmable Josephson Voltage Standard
Topic: Quantum Electrical Measurements
Published: 6/22/2007
Authors: Charles J Burroughs, Alain Rufenacht, Samuel Paul Benz, Paul David Dresselhaus
Abstract: We have measured stepwise-approximated sinewaves generated by a Programmable Josephson Voltage Standard with several different output configurations. These data are analyzed to characterize the dominant error mechanisms for rms applications, such as ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32893

38. Application of the Josephson Effect to Metrology
Topic: Quantum Electrical Measurements
Published: 10/1/2004
Authors: Samuel Paul Benz, Clark Hamilton
Abstract: The unique ability of a Josephson junction to control the flow of magnetic flux quanta leads to a perfect relationship between frequency and voltage. Over the last 30 years, metrology laboratories have used this effect to greatly improve the accura ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=31547

39. All-NbN Digital-to-Analog Converters for a Programmable Voltage Standard
Topic: Quantum Electrical Measurements
Published: 11/21/2001
Authors: Hirotake Yamamori, M. Itoh, H. Sasaki, A. Shoji, Samuel Paul Benz, Paul David Dresselhaus
Abstract: Five-bit all-NbN digital-to-analog converters (DACs) for a programmable voltage standard have been fabricated using NbN/TiNx/NbN Josephson junctions and their operation has been demonstrated. The DAC consists of six arrays of 128, 128, 256, 512, 1024 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=16576

40. 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



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