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VOLUME 60 (1994) | ISSUE 8 | PAGE 595
Fluctuation limit of measurements of the relative elongation of a magnetostrictive cylinder
A method is proposed for detecting small changes in length by means of a SQUID-magnetostrictor system. By using an advanced SQUID with a resolution of 10~6Φ0/\/Ηζ, one can develop a system for measuring relative elongations on the order of 10~21/VHz and less. This estimate demonstrates the potential for the use of SQUID-magnetorestrictor systems for detecting gravitational waves. Fluctuations of the magnetization of the magnetostrictor are incorporated in an analysis of the resolution of the system. © 1994 American Institute of Physics.