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Topic Area: Quantum Electrical Measurements

Displaying records 61 to 70 of 292 records.
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61. 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

62. Design of SNS Josephson Arrays for High Voltage Applications
Topic: Quantum Electrical Measurements
Published: 6/4/2007
Authors: Paul David Dresselhaus, Samuel Paul Benz, Charles J Burroughs, Norman F Bergren, Yonuk Chong
Abstract: The voltage from a single, microwave-biased Josephson junction is a small quantity; thus useful voltages are only generated through series arrays of many thousands of junctions. Arrays of superconductor-normal metal-superconductor junctions have been ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32455

63. Precision Measurements using a 300 mV Josephson Arbitrary Waveform Synthesizer
Topic: Quantum Electrical Measurements
Published: 6/4/2007
Authors: Samuel Paul Benz, Paul David Dresselhaus, Charles J Burroughs, Norman F Bergren
Abstract: We have developed a Josephson Digital-to-Analog Converter, otherwise know as a Josephson Arbitrary Waveform Synthesizer, with 300 mV peak output voltage. This is the first system of its kind with demonstrated quantum accuracy. We will show precision ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32454

64. A 14-pixel, multiplexed array of gamma-ray microcalorimeters with 47 eV energy resolution at 103 keV
Topic: Quantum Electrical Measurements
Published: 5/9/2007
Authors: William Bertrand Doriese, Joel Nathan Ullom, James A Beall, William Duncan, S. Lisa Ferreira, Gene C Hilton, Robert Daniel Horansky, Kent D Irwin, John Arthur Benson Mates, Carl D Reintsema, Leila R Vale, Yizi Xu, Barry L. Zink, Andrew Hoover, Michael W Rabin, Clifford R Rudy, Duc Vo
Abstract: We present a prototype for a high-energy-resolution, high-count-rate, gamma-ray spectrometer intended for nuclear forensics and international nuclear safeguards. The prototype spectrometer is an array of 14 transition-edge-sensor microcalorimeters wi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32599

65. AC-DC Transfer Standard Measurements with an AC Josephson Voltage Standard
Topic: Quantum Electrical Measurements
Published: 4/2/2007
Authors: Samuel Paul Benz, Charles J Burroughs, Paul David Dresselhaus, Norman F Bergren, Thomas E Lipe, Joseph R Kinard, Yi-hua Tang
Abstract: In order to improve the NIST low-voltage calibration service for thermal voltage converters, we have constructed an ac Josephson voltage standard system that can synthesize accurate rms voltages up to 100 mV. Using this system, we synthesized dc volt ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32363

66. Thermal Stability of Nb/a-NbxSi1-x/Nb Josephson Junctions
Topic: Quantum Electrical Measurements
Published: 2/16/2007
Authors: Burm Baek, Paul David Dresselhaus, Samuel Paul Benz
Abstract: As a high resistivity normal metal barrier for superconducting Josephson junctions, metal-silicon alloys appear to be a good replacement for noble metals and have been applied to the development of quantum voltage standard circuits. We observed that ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32429

67. 100 mV ac-dc Transfer Standard measurements with a Pulse-driven AC Josephson Voltage Standard
Topic: Quantum Electrical Measurements
Published: 7/14/2006
Authors: Samuel Paul Benz, Charles J Burroughs, Paul David Dresselhaus, Thomas E Lipe, Joseph R Kinard
Abstract: In order to improve the low-voltage calibration service at NIST we have constructed an ac Josephson voltage standard system with a maximum rms output voltage of 100 mV. Using this system we synthesized sinewaves of various audio frequencies and measu ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32193

68. Development of a 60 Hz Power Standard using SNS Programmable Josephson Voltage Standards
Topic: Quantum Electrical Measurements
Published: 7/14/2006
Authors: Charles J Burroughs, Samuel Paul Benz, Paul David Dresselhaus, Yonuk Chong, Bryan C Waltrip, Thomas L Nelson, J. Williams
Abstract: We are implementing a new standard for 60 Hz mains power based on precision sinusoidal reference voltages from two independent Programmable Josephson Voltage Standards (PJVS) (one for voltage and one for current). Our NIST PJVS systems are based on s ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32194

69. VARIABILITY OF CHARGE NOISE IN Al-BASED SET TRANSISTORS
Topic: Quantum Electrical Measurements
Published: 7/14/2006
Authors: Mark W Keller, B. Jeanneret, Jose Alberto Aumentado
Abstract: We measured the charge noise of four Al-based SET transistors on multiple cooldowns. We found a consistent 1/f component independent of thermal cycling and other treatments, but large variations in the total noise spectrum due to two-level fluctuator ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=32202

70. 100 mV AC-DC Transfer Standard Measurements Using An AC Josephson Voltage Standard
Topic: Quantum Electrical Measurements
Published: 6/1/2006
Authors: Charles J Burroughs, Samuel Paul Benz, Paul David Dresselhaus
Abstract: NIST is implementing the Josephson arbitrary waveform synthesizer as an ac Josephson Voltage Standard (ACJVS). Over the past few years we have demonstrated precision measurements of synthesized sine waves at rms voltage amplitudes up to 170 mV. The s ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=31972