Skip to main content
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.

Operation of a NbN-Based Programmable Josephson Voltage Standard Chip with a Compact Refrigeration System

Published

Author(s)

A. Shoji, Hirotake Yamamori, Mayumi Ishizaki, Samuel Benz, Paul Dresselhaus

Abstract

A refrigeration system was designed and constructed for realizing a liquid-He-free programmable Josephson voltage standard. The system is equipped with a two-stage Gifford-McMahon cooler, a heat radiation shield, a magnetic field shield, and semi-rigid coaxial cables to supply microwave power to a chip. The performance of the system was examined using a NbN-based 8-bit digital-to-analog converter (DAC) chip designed as a 1 V programmable voltage standard. When operated at 8.5 K on the cryocooler, constant-voltage steps with amplitudes greater than 1 mA were observed for every segment of junction arrays on the chip.
Citation
IEEE Transactions on Applied Superconductivity
Volume
13
Issue
2

Keywords

Josephson junction, NbN, refrigeration system, TiN, voltage standard, digital-to-analog converter

Citation

Shoji, A. , Yamamori, H. , Ishizaki, M. , Benz, S. and Dresselhaus, P. (2003), Operation of a NbN-Based Programmable Josephson Voltage Standard Chip with a Compact Refrigeration System, IEEE Transactions on Applied Superconductivity, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=30318 (Accessed November 7, 2024)

Issues

If you have any questions about this publication or are having problems accessing it, please contact reflib@nist.gov.

Created May 31, 2003, Updated October 12, 2021