Initial Considerations of A 12.5 T Magnet Design
Cu/Sc Inner: 1.2, Outer: 2.7 for Jcu ~ 1500 A/mm2
(conductor use at 12.5 T is about 1/2 of that at ~15 T)
*** Nb3Sn portion in outer may be reduced
Hybrid Nb3Sn (Inner) and NbTi (outer) Design
Cu/Sc Inner: 1.2, Outer: 1.5
(Inner same as in all Nb3Sn)