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Proceedings Paper

Effects of radio frequency radiation on the dc SQUID
Author(s): Roger H. Koch; Vittorio Foglietti; James R. Rozen; K. G. Stawiasz; M. B. Ketchen; Daniel K. Lathrop; Jonathan Z. Sun; William J. Gallagher
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Paper Abstract

The effects of radio frequency radiation on the dc SQUID are examined. Simulations show how the shape of the SQUID transfer characteristic is distorted by radio frequency interference (RFI). How this affects three commonly used SQUID modulation methods is discussed, and the results explain why we experimentally observe the bias current reversing readout method to be the least susceptible to RFI. The commonly seen increase in the low frequency flux noise power spectrum of dc SQUIDs in unshielded environments is also explained.

Paper Details

Date Published: 2 July 1994
PDF: 1 pages
Proc. SPIE 2160, Superconductive Devices and Circuits, (2 July 1994); doi: 10.1117/12.181000
Show Author Affiliations
Roger H. Koch, IBM Thomas J. Watson Research Ctr. (United States)
Vittorio Foglietti, IBM Thomas J. Watson Research Ctr. (United States)
James R. Rozen, IBM Thomas J. Watson Research Ctr. (United States)
K. G. Stawiasz, IBM Thomas J. Watson Research Ctr. (United States)
M. B. Ketchen, IBM Thomas J. Watson Research Ctr. (United States)
Daniel K. Lathrop, IBM Thomas J. Watson Research Ctr. (United States)
Jonathan Z. Sun, IBM Thomas J. Watson Research Ctr. (United States)
William J. Gallagher, IBM Thomas J. Watson Research Ctr. (United States)


Published in SPIE Proceedings Vol. 2160:
Superconductive Devices and Circuits
Robert A. Buhrman; John T. Clarke; Ken Daly; Roger H. Koch; Jerome A. Luine; Randy W. Simon, Editor(s)

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