Persistent Current-induced Harmonics Traditional solution: work on the superconductor
Garber, Ghosh and Sampson (BNL)
Persistent current induced magnetization :
Problem in Nb3Sn Magnets because
(a) Jc is higher by several times
(b) Effective filament diameter is larger by about an order of magnitude
Conductor solution:
Reduce effective filament diameter.
A challenge; in some cases it also reduces Jc.
Note: Iron dominated magnets don’t have this problem.