Advanced strand design for precision DC-field and ramp-field magnets

Author

Collings, E.W. ; Sumption, M.D.

Author_Institution

Battelle Memorial Inst., Columbus, OH, USA

Volume

28

Issue

1

fYear

1992

fDate

1/1/1992 12:00:00 AM

Firstpage

156

Lastpage

159

Abstract

The use of the solid-solution alloy Cu-Mn as an interfilamentary matrix to eliminate proximity effect coupling in multifilamentary strands is discussed. Eddy current measurements indicate that the presence of Mn does little to increase the transverse resistivity of a fine-filament composite, which is controlled primarily by interfilamentary size effect. The introduction of Ni into the strand, either as a replacement filament or an electroplated coating, can compensate for superconductor magnetization and assist in eliminating axial-field distortions in magnets wound from that strand

Keywords

composite superconductors; copper alloys; eddy current losses; magnetic hysteresis; manganese alloys; niobium alloys; size effect; superconducting magnets; titanium alloys; type II superconductors; AC losses; CuMn solid solution alloy; NbTi; NbTi-CuMn; advanced strand design; axial-field distortions; eddy current; electroplated coating; fine-filament composite; hysteresis loops; interfilamentary matrix; interfilamentary size effect; precision DC field magnets; proximity effect coupling; ramp-field magnets; superconductor magnetization; transverse resistivity; Coatings; Conductivity; Current measurement; Eddy currents; Multifilamentary superconductors; Proximity effect; Size control; Size measurement; Superconducting filaments and wires; Superconducting magnets;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.119833

Filename

119833