Coupling- and Persistent-Current Magnetizations of Nb3Sn Rutherford Cables With Cores of Stainless Steel and Woven Glass-Fiber Tape Measured by Pick-Up Coil Magnetometry

被引:5
|
作者
Collings, E. W. [1 ]
Sumption, M. D. [1 ]
Susner, M. A. [1 ]
Dietderich, D. R. [2 ]
Kroopshoop, E. [3 ]
Nijhuis, A. [3 ]
机构
[1] Ohio State Univ, Dept Mat Sci & Engn, Labs Appl Superconduct and Magnetism LASM, Columbus, OH 43210 USA
[2] Univ Calif Berkeley, Lawrence Berkeley Natl Lab, Superconducting Magnet Grp, Berkeley, CA 94720 USA
[3] Univ Twente, Fac Sci Appl, Low Temp Div, NL-7500 AE Enschede, Netherlands
关键词
AC loss; core-type cables; coupling magnetization; interstrand contact resistance; persistent-current magnetization; pick-up-coil magnetometry; Rutherford cables; stainless-steel-tape cores; woven glass-fiber-tape cores; INTERSTRAND CONTACT RESISTANCE; AC-LOSS; SUPERCONDUCTING CABLES; LOSSES;
D O I
10.1109/TASC.2013.2243796
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
Coupling- and persistent-current magnetization of Nb3Sn Rutherford cables with cores of stainless steel (SS) and woven glass-fiber tape were measured by pick-up coil magnetometry in transverse magnetic fields of amplitude 400 mT and frequencies of up to 90 mHz applied in the face-on orientation. Analysis of the results yielded the interstrand contact resistances as well as estimates of the face-on coupling magnetizations generated by fields ramping at the LHC-specified 6.5 mT/s. Distinct differences were discovered in the behaviors of the SS-cored and glass-fiber-cored cables. The cable with a wide SS core had suitable coupling properties; that with a narrow off-center SS core provided excessively large coupling magnetization. The glass-fiber-cored cables exhibited anomalous ac-loss frequency dependence indicative of loose Rutherford-like assemblies of strands with relatively few points of low-resistance interstrand contact.
引用
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页数:5
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