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You searched on: Topic Area: Quantum Electrical Measurements Sorted by: title

Displaying records 41 to 48.
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41. Progress Toward an AC Josephson Voltage Standard
Topic: Quantum Electrical Measurements
Published: 6/1/1996
Authors: Clark A. Hamilton, Charles J Burroughs, Samuel Paul Benz
Abstract: Progress toward a Josephson voltage standrd for fast dc measurements and ac waveform synthesis is described, including a version with SNS junctions operated at 11 GHz. A bias control circuit that achieves millampere drive capability, transient suppr ...

42. 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 ...

43. 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 ...

44. 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 ...

45. 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 ...

46. Systematic Error Resolved in NIST Johnson Noise Thermometer
Topic: Quantum Electrical Measurements
Published: 8/24/2014
Authors: Alessio Pollarolo, Weston Leo Tew, Horst Rogalla, Samuel Paul Benz
Abstract: In the Johnson Noise Thermometry approach, Boltzmann‰s constant k is obtained as the ratio of the noise power measured across a sense resistor at the triple point of water and the noise power measured for a synthesized reference waveform. The ref ...

47. Two Volt Josephson Arbitrary Waveform Synthesizer Using Wilkinson Dividers
Topic: Quantum Electrical Measurements
Published: 2/19/2016
Authors: Nathan E Flowers-Jacobs, Anna E Fox, Paul David Dresselhaus, Robert E Schwall, Samuel Paul Benz
Abstract: The root-mean-square (rms) output voltage of the NIST Josephson arbitrary waveform synthesizer (JAWS) has been doubled from 1 V to a record 2 V by combining two new 1 V chips on a cryocooler. This higher voltage will improve calibrations of ac therma ...

48. 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 ...

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