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Conference on Precision Electromagnetic Measurements

Microwave properties of large SINIS series arrays for Josephson voltage standards of intrinsic stability

J. Kohlmann, H. Schulze, Ralf Behr, F. Muller, I. Ya. Krasnopolin, J. Niemeyer

Published Nov 7, 2002• 0 citations
Publisher

Abstract

Series arrays of several thousands of overdamped SINIS junctions have been fabricated for programmable voltage standards. The arrays can be operated with low microwave power, since the major part of the microwave power is generated by the junctions itself. The operation of the arrays and the formation of Shapiro steps is discussed.
DOI
10.1109/cpem.2000.851041

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Programmable Josephson voltage standards for output voltages up to 10 V have been realized. Binary-divided series arrays consisting of 69 632 overdamped SINIS Josephson junctions have been fabricated using reliable Nb-Al/Al2O3technology (S: superconductor, I: insulator, N: normal metal). Series arrays of about 1000 SNS Josephson junctions were realized as lumped arrays for applications in the Josephson arbitrary waveform synthesizer (JAWS). We suggest a novel scheme for combining the higher voltages generated by the binary-divided arrays with the frequency spectral characteristics of the JAWS, in order to optimize the frequency spectrum of the generated ac voltages
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