NDLI: Contact resistance and cable loss measurements of coated strands and cables wound from them

Content Provider	IEEE Xplore Digital Library
Author	Sumption, M.D. ten Kate, H.H.J. Scanlan, R.M. Collings, E.W.
Copyright Year	2002
Abstract	Calorimetric and magnetic studies of AC loss have been performed on 11-strand Rutherford cables made from multifilamentary strands with a variety of coatings. Interstrand contact resistance (R/sub c/) measurements supplemented these studies. R/sub c/s were deduced from the M-H determined eddy current loss as a function of ramp rate for four superconducting wires arranged in a rectangular geometry and put under a predetermined strain. It was found that: (1) the dominant factor which determines the R/sub c/ for uncoated strands is the level of surface oxidation (even for solvent cleaned strands); (2) strands can be de-oxidized either by an HCl etch or a vacuum anneal; and (3) strand coatings add significantly to the contact resistances of un-oxidized strands. It is concluded that contact resistance, and hence cable loss, is largely determined by the surface condition of the strands rather than the area ("spoon size") of the interstrand contact.<>
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	692
Ending Page	696
Page Count	5
File Size	450907
File Format	PDF
ISSN	10518223
Volume Number	5
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1995-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Contact resistance Electrical resistance measurement Loss measurement Wounds Coatings Surface resistance Superconducting magnets Superconducting cables Eddy currents Superconducting filaments and wires
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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