NDLI: Analysis of the optimal location of magnetic field probes for the determination of the current distribution inside S/C cables

Content Provider	IEEE Xplore Digital Library
Author	Bellina, F. Bettini, P. Trevisan, F.
Copyright Year	2002
Abstract	During the tests on superconducting cables, the magnetic field is often measured by means of pick-up or Hall probes and these data are used to reconstruct the current distribution inside the cable. The efficiency and the accuracy of the reconstruction procedure depend on the algorithm adopted and on the location of the field probes. For a given geometry of the lines of current, the determination of the current distribution can be mathematically formulated as a linear inverse problem, in which the residual between the measured and the computed field values at the probe locations is minimised. A linear least-squares problem results, which is solved by means of the truncated singular value decomposition technique, applied to the matrix G which relates the unknown currents to the computed magnetic field values. The condition number of G is proposed here as an index of the quality of the location of the probes: a good location corresponds to a well conditioned G, while a bad location gives a worse conditioned matrix. In this paper a reconstruction procedure is presented and a criterion for the optimal probe positioning is shown.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	2379
Ending Page	2382
Page Count	4
File Size	469917
File Format	PDF
ISSN	10518223
Volume Number	11
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-03-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Magnetic analysis Magnetic fields Probes Magnetic field measurement Superconducting cables Current measurement Current distribution Testing Hall effect devices Power cables
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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