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

Displaying records 41 to 46.
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41. 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

42. 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

43. 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

44. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=915395

45. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=920103

46. 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



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