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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. 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

32. 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

33. 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

34. 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

35. 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

36. 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

37. 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

38. 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

39. 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

40. Operating Margins for a Superconducting Voltage Waveform Synthesizer
Topic: Quantum Electrical Measurements
Published: 6/1/1999
Authors: Samuel Paul Benz, Clark A. Hamilton, Charles J Burroughs
Abstract: Operating margins for biolar superconducting voltage waveform synthesizer were measured. Current ranges were determined for 101 equally spaced dc voltage steps between - 18.6 and + 18.6 mV. The measured voltages of these steps deviated from the exp ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=176



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