Powder-in-tube (PIT) Nb/sub 3/Sn conductors for high-field magnets

Author

Lindenhovius, J.L.H. ; Hornsveld, E.M. ; den Ouden, A. ; Wessel, W.A.J. ; ten Kate, H.H.J.

Author_Institution

ShapeMetal Innovation B.V., Enschede, Netherlands

Volume

10

Issue

1

fYear

2000

fDate

3/1/2000 12:00:00 AM

Firstpage

975

Lastpage

978

Abstract

New Nb/sub 3/Sn conductors, based on the powder-in-tube (PIT) process, have been developed for application in accelerator magnets and high-field solenoids. For application in accelerator magnets, SMI has developed a binary 504 filament PIT conductor by optimizing the manufacturing process and adjustment of the conductor lay-out. It uniquely combines a non-copper current density of 2680 A/mm/sup 2/@10 T with an effective filament diameter of about 20 /spl mu/m. This binary conductor may be used in a 10 T, wide bore model separator dipole magnet for the LHC, which is being developed by a collaboration of the University of Twente and CERN. A ternary (Nb/7.5wt%Ta)/sub 3/Sn conductor containing 37 filaments is particularly suited for application in extremely high-field superconducting solenoids. This wire features a copper content of 43%, a non-copper current density of 217 A/mm/sup 2/@20 T and a B/sub c2/ of 25.6 T. The main issues and the experimental results of the development program of PIT Nb/sub 3/Sn conductors are presented and discussed in this paper.

Keywords

accelerator magnets; colliding beam accelerators; critical current density (superconductivity); materials preparation; multifilamentary superconductors; niobium alloys; proton accelerators; storage rings; superconducting magnets; synchrotrons; tin alloys; type II superconductors; 10 T; 20 T; 25.6 T; LHC; Nb/sub 3/Sn; accelerator magnets; binary 504 filament PIT conductor; conductor lay-out; copper content; current density; effective filament diameter; extremely high-field superconducting solenoids; high-field magnets; high-field solenoids; manufacturing process; powder-in-tube Nb/sub 3/Sn conductors; wide bore model separator dipole magnet; wire; Accelerator magnets; Boring; Conductors; Current density; Manufacturing processes; Niobium; Particle separators; Solenoids; Superconducting magnets; Tin;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.828394

Filename

828394