NDLI: Electromagnetic and mechanical characterisation of ITER CS-MC conductors affected by transverse cyclic loading. I. Coupling current loss

Content Provider	IEEE Xplore Digital Library
Author	Nijhuis, A. Noordman, N.H.W. ten Kate, H.H.J. Mitchell, N. Bruzzone, P.
Copyright Year	2002
Abstract	The magnetic field generated by a coil acts on the cable which results in a transverse force on the strands. This affects the interstrand contact resistances (R/sub c/), the coupling current loss and current redistribution during field changes. A special cryogenic press has been built to study the mechanical and electrical properties of full-size ITER conductor samples under transverse, mechanical loading. The cryogenic press can transmit a variable (cyclic) force up to 650 kN/m to a conductor section of 400 mm length at 4.2 K. The jacket is partly opened in order to transmit the force directly onto the cable. In addition a superconducting dipole coil provides the magnetic field required to perform magnetisation measurements using pick-up coils. The various R/sub c/'s between strands selected from different positions inside the cable have been studied. The coupling loss time constants (n/spl tau/) during and after loading are verified for the Nb/sub 3/Sn, 45 kA, 10 and 13 T, ITER Model Coil conductors. A summary of the results obtained with up to several tens of full loading cycles is presented. A significant decrease of the cable n/spl tau/ after several cycles is observed. The values of the n/spl tau/'s are discussed with respect to the R/sub c/ measurements and a multiple time constant model (MTC).
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	1069
Ending Page	1072
Page Count	4
File Size	481698
File Format	PDF
ISSN	10518223
Volume Number	9
Issue Number	2
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1999-06-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Superconducting cables Conductors Superconducting coils Cryogenics Cable shielding Magnetic field measurement Electromagnetic forces Magnetic fields Contacts Mechanical factors
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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