U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications by: Charles J. Burroughs (Fed)

Search Title, Abstract, Conference, Citation, Keyword or Author
Displaying 51 - 75 of 116

Design of SNS Josephson Arrays for High Voltage Applications

June 4, 2007
Author(s)
Paul Dresselhaus, Samuel Benz, Charles J. Burroughs, Norman F. Bergren, Yonuk Chong
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

Precision Measurements using a 300 mV Josephson Arbitrary Waveform Synthesizer

June 4, 2007
Author(s)
Samuel P. Benz, Paul D. Dresselhaus, Charles J. Burroughs, Norman F. Bergren
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

AC-DC Transfer Standard Measurements with an AC Josephson Voltage Standard

April 2, 2007
Author(s)
Samuel P. Benz, Charles J. Burroughs, Paul D. Dresselhaus, Norman F. Bergren, Thomas E. Lipe, Joseph R. Kinard Jr., Yi-hua Tang
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 voltages

Resistance-Based Scaling of LF-and MF-Band Thermal Noise Powers

April 1, 2007
Author(s)
John Labenski, Weston L. Tew, Sae Woo Nam, Samuel P. Benz, Paul D. Dresselhaus, Charles J. Burroughs
A conventional technique for scaling thermal noise power in Johnson Noise Thermometry (JNT) is via resistance ratios. We describe measurements in the low to medium frequency (LF/MF) bands using this approach via correlation methods in the frequency domain

100 mV ac-dc Transfer Standard measurements with a Pulse-driven AC Josephson Voltage Standard

July 14, 2006
Author(s)
Samuel P. Benz, Charles J. Burroughs, Paul D. Dresselhaus, Thomas E. Lipe, Joseph R. Kinard Jr.
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 measured ac

Development of a 60 Hz Power Standard using SNS Programmable Josephson Voltage Standards

July 14, 2006
Author(s)
Charles J. Burroughs, Samuel Benz, Paul Dresselhaus, Yonuk Chong, Bryan C. Waltrip, Thomas L. Nelson, J. Williams
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

100 mV AC-DC Transfer Standard Measurements Using An AC Josephson Voltage Standard

June 1, 2006
Author(s)
Charles J. Burroughs, Samuel Benz, Paul Dresselhaus
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 system

Josephson junctions with nearly superconducting metal silicide barriers

November 23, 2005
Author(s)
Yonuk Chong, Nicolas Hadacek, Paul Dresselhaus, Charles J. Burroughs, Burm Baek, Samuel Benz
We present a detailed study of the electrical properties of Nb-based planar Josephson junctions with superconducting metal silicide barriers, TiSi2 and WSi2. While these non-hysteretic junctions are useful for voltage standard applications, they are also

Progress Toward Practical AC and DC Josephson Voltage Standards at NIST

September 21, 2005
Author(s)
Samuel Benz, Charles J. Burroughs, Paul Dresselhaus, Nicolas Hadacek, Yonuk Chong
For the past 10 years NIST has been developing the next generation of voltage standard systems based on arrays of normal-metal barrier Josephson junctions. We have developed stable, programmable dc standards capable of providing intrinsically stable

Silicide Barrier SNS Junctions for AC Josephson Voltage Standards

September 5, 2005
Author(s)
Paul Dresselhaus, Yonuk Chong, Nicolas Hadacek, Burm Baek, Michio Watanabe, Charles J. Burroughs, Samuel Benz
We have used MoSi2 barrier superconductor-normal-metal-superconductor (SNS) double stacked junctions to generate audio frequency ac waveforms with metrological accuracy. Circuits used in this experiment were two parallel arrays of 1280 stacks of 2

Flexible Cryo-packages for Josephson Devices

June 1, 2005
Author(s)
Charles J. Burroughs, Samuel Benz, Paul Dresselhaus, Yonuk Chong, Hirotake Yamamori
We have developed a method of bonding superconductive integrated-circuit chips to interchangeable, microwave-compatible, flexible cryo-packages. This new 'flip-chip on flex' technology will greatly improve the service life and reliability of our Josephson

Practical High-Resolution Programmable Josephson Voltage Standards using Double- and Triple-Stacked MoSi 2 -Barrier Junctions

June 1, 2005
Author(s)
Yonuk Chong, Charles J. Burroughs, Paul Dresselhaus, Nicolas Hadacek, Hirotake Yamamori, Samuel Benz
We have developed vertically stacked superconductor-normal metal- superconductor Josephson junction technology for the next generation quantum voltage standards. Stacked junctions provide a practical way of increasing the output voltage and operating

Precision Measurements of AC Josephson Voltage Standard Operating Margins

April 1, 2005
Author(s)
Charles J. Burroughs, Samuel P. Benz, Paul D. Dresselhaus, Yonuk Chong
Recent advances in circuit design and fabrication of superconducting integrated circuits have enabled us to demonstrate an ac Josephson voltage standard (ACJVS) that generates both ac and dc waveforms up to 242mV peak voltage. Using a Fast Fourier

Progress on Johnson Noise Thermometry using a Quantum Voltage Noise Source for Calibration

April 1, 2005
Author(s)
Sae Woo Nam, Samuel P. Benz, Paul D. Dresselhaus, Charles J. Burroughs, Weston L. Tew, D. R. White, John M. Martinis
We describe our progress towards a high-precision measurement of temperature using Johnson noise. Using a Quantized Voltage Noise Source (QVNS) based on the Josephson effect as a calculable noise source, we have been able to measure the ratio of the

Double-stacked MoSi2-barrier junctions for programmable Josephson voltage standards

June 1, 2004
Author(s)
Yonuk Chong, Charles J. Burroughs, Paul D. Dresselhaus, Nicolas Hadacek, Hirotake Yamamori, Samuel P. Benz
We are developing MoSi2-barrier stacked junction arrays for Josephson voltage standards in order to increase the output voltage, operating bandwidth, and operating margins. In this paper we present results of a programmable voltage standard circuit with

Flat-Spot Measurements for an AC Josephson Voltage Standard

June 1, 2004
Author(s)
Charles J. Burroughs, Samuel P. Benz, Paul D. Dresselhaus, Yonuk Chong
Recent advances in circuit design and fabrication of superconducting integrated circuits have enabled us to demonstrate for the first time an ac Josephson voltage standard (ACJVS) that generates both ac and dc waveforms up to 242 mV peak voltage. Using a

Operating Margin Measurements for an AC Josephson Voltage Standard

August 17, 2003
Author(s)
Charles J. Burroughs, Samuel Benz, Paul Dresselhaus
For a number of years, NIST has been developing a Josephson arbitrary waveform synthesizer as an ac Josephson Voltage Standard (ACJVS). The effort has primarily focused on increasing the output voltage to practical levels. Recent advances in circuit design

4K Cryocooler Implementation of a DC Programmable Voltage Standard

June 1, 2003
Author(s)
Charles J. Burroughs, Robert J. Webber, Paul Dresselhaus, Samuel Benz
NIST and Hypres, Inc. have been collaborating to develop a 1 Volt DC programmable Josephson voltage standard (PJVS) that operates on a closed-cycle refrigerator. The goal of this work is to construct a platform that will allow the chip to work at 4 K

AC Josephson Voltage Standard Error Measurements and Analysis

April 1, 2003
Author(s)
Charles J. Burroughs, Samuel Benz, Paul Dresselhaus
The Josephson arbitrary waveform synthesizer can be used as a precision voltage source for both ac and dc signals. Recent improvements in circuit designs have resulted in output voltages greater than 100 mVrms so that we can investigate ac metrology

Characterization of Binary Josephson Series Arrays of Different Types at BNM-LNE and Comparisons with Conventional SIS Arrays

April 1, 2003
Author(s)
Jean-Pierre Lo-Hive, Sophie Djordjevic, Phillippe Cancela, Francois P. Piquemal, Ralf Behr, Charles J. Burroughs, H. Seppa
Three 1-V binary Josephson arrays developed by the NIST, the PTB, and the VTT, and using, respectively, superconductor-normal metal-superconductor (SNS), superconductor-insulator-normal metal-insulator-superconductor (SINIS), and externally shunted

Stacked Nanoscale Josephson Junction Arrays for High-Performance Voltage Standards

December 4, 2002
Author(s)
Samuel Benz, Paul Dresselhaus, Yonuk Chong, Charles J. Burroughs
Superconducting Josephson voltage standard systems have replaced electrochemical cell (battery-like) artifact standards for voltage metrology because quantum-based systems produce precise and accurate voltages independent of any material parameters. The

Error Measurements and Analysis for an AC Josephson Voltage Standard

June 1, 2002
Author(s)
Charles J. Burroughs, Samuel Benz, Paul Dresselhaus
The Josephson arbitrary waveform synthesizer can be used as a precision voltage source for both ac and dc signals. Recent improvements in circuit designs have have resulted in output voltages greater than 100 mV so that we can investigate ac metrology