Persistent Current-induced Harmonics (may be a problem in Nb3Sn magnets, if done nothing)
Garber, Ghosh and Sampson (BNL)
Persistent current induced magnetization :
Nb3Sn, with the technology under use now, is expected to generate persistent current-induced harmonics
which are a factor of 10-100 worse than those measured in Nb-Ti magnets (due to about a factor of two
higher critical current density and about a factor of 10 higher effective filament diameter). In addiction,
a snap-back problem is observed when the acceleration starts after injection at study state (constant field).