Dresselhaus, P.
, Benz, S.
, Burroughs, C.
, Bergren, N.
and Chong, Y.
(2007),
Design of SNS Josephson Arrays for High Voltage Applications, IEEE Transactions on Applied Superconductivity, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=32455
(Accessed October 31, 2024)
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Design of SNS Josephson Arrays for High Voltage Applications
Published
Author(s)
, , , , 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 fabricated and tested with up to 16,500 junctions per array. The arrays are optimized for the highest voltage operation with the largest operating margins for the current bias. Measurements show that these arrays, driven with 20 GHz microwaves, generate a dc voltage greater than 680 mV per array with over 1 mA dc bias margin. In an effort to increase the microwave uniformity across the array, the transmission line impedance has been tapered. Using this technique, ac Josephson voltages over 110 mVrms per array have been generated, also with over 1mA dc bias margin.Citation
IEEE Transactions on Applied Superconductivity
Volume
17
Issue
2
Pub Type
Journals
Download Paper
Keywords
Josephson Voltage standard, microwave devices, SNS junctions
Citation
Issues
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Created June 3, 2007, Updated October 12, 2021