Title :
Fabrication and component testing results for a Nb/sub 3/Sn dipole magnet
Author :
Dell´Orco, D. ; Scanlan, R.M. ; Taylor, C.E. ; Lietzke, A. ; Caspi, S. ; van Oort, J.M. ; McInturff, A.D.
Author_Institution :
Lawrence Berkeley Lab., CA, USA
fDate :
6/1/1995 12:00:00 AM
Abstract :
At present, the maximum field achieved in accelerator R&D dipoles is slightly over 10 T, with NbTi conductor at 1.8 K. Although Nb/sub 3/Sn has the potential to achieve much higher fields, none of the previous dipoles constructed from Nb/sub 3/Sn have broken the 10 T barrier. We report here on the construction of a dipole with high current density Nb/sub 3/Sn with a predicted short sample limit of 13 T. A wind and react technique, followed by epoxy impregnation of the fiberglass insulated coils, was used. The problems identified with the use of Nb/sub 3/Sn in earlier dipole magnets were investigated in a series of supplemental tests. This includes measurement of the degradation of Jc with transverse strain, cabling degradation, joint resistance measurements, and epoxy strength tests. In addition, coil assembly techniques were developed to ensure that adequate prestress could be applied without damaging the reacted Nb/sub 3/Sn cable. We report here the results of these tests and the construction status of this 50 mm bore dipole.<>
Keywords :
accelerator magnets; critical current density (superconductivity); electric resistance measurement; electron device manufacture; mechanical strength; mechanical testing; niobium alloys; strain measurement; superconducting cables; superconducting coils; superconducting device testing; superconducting magnets; tin alloys; 13 T; 50 mm; Nb/sub 3/Sn; Nb/sub 3/Sn dipole magnet; accelerator R&D dipoles; cabling degradation measurement; coil assembly techniques; component testing; critical current density measurement; epoxy impregnation; epoxy strength tests; fabrication; fiberglass insulated coils; high current density; joint resistance measurement; short sample limit; superconducting magnets; transverse strain measurement; wind and react technique; Coils; Degradation; Electrical resistance measurement; Fabrication; Niobium compounds; Research and development; Strain measurement; Testing; Tin; Titanium compounds;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
