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Displaying records 31 to 40 of 44 records.
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31. NIST 10 V Programmable Josephson Voltage Standard System Using a Low Capacity Cryocooler
Topic: Quantum Electrical Measurements
Published: 11/6/2014
Authors: Logan A. Howe, Anna E Fox, Alain Rufenacht, Charles J Burroughs, Paul David Dresselhaus, Samuel Paul Benz, Robert E Schwall
Abstract: Rising costs of and difficulty in obtaining liquid helium in many areas of the world provides strong motivation for cryogen-free operation of superconducting devices such as NIST Programmable Josephson Voltage Standard (PJVS) systems. However, op ...

32. 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 ...

33. 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 ...

34. 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 ...

35. Performance Improvements for the NIST 1 V Josephson arbitrary waveform synthesizer
Topic: Quantum Electrical Measurements
Published: 11/10/2014
Authors: Samuel Paul Benz, Steven Beyer Waltman, Anna E Fox, Paul David Dresselhaus, Alain Rufenacht, Logan A. Howe, Robert E Schwall, Nathan E Flowers-Jacobs
Abstract: The performance of the NIST Josephson arbitrary waveform synthesizer has been improved such that it generates a root-mean-square (RMS) output voltage of 1 V with an operating current range greater than 2 mA. Our previous 1 V JAWS circuit achieved ...

36. 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 ...

37. Preparation of Non-equilibrium Nuclear Spin States in Double Quantum Dots
Topic: Quantum Electrical Measurements
Published: 7/15/2013
Authors: Jacob M Taylor, Michael Gullans, Jacob J Krich, Bertrand I Halperin, M D Lukin
Abstract: We theoretically study the dynamic polarization of lattice nuclear spins in GaAs double quantum dots containing two electrons. We introduce a semiclassical model that allows to explore a wide range of parameter regimes in this system. We identify thr ...

38. 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 ...

39. 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 ...

40. 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 ...

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