Title :
A 17 T NbTi-Nb3Sn superconducting magnet with low-purity holmium core
Author :
Lin, L.Z. ; Li, K.W. ; Lin, C.Y. ; Han, S. ; Li, X.S. ; Yan, L.G.
Author_Institution :
Inst. of Electr. Eng., Acad. Sinica, Beijing, China
fDate :
3/1/1989 12:00:00 AM
Abstract :
A 14-T NbTi-Nb3Sn superconducting magnet system with 31-mm bore has been constructed and tested. The magnet system consists of three coils one of NbTi and two of Nb3Sn. Two different cross sections of Nb3Sn wire constructed using the bronze method were chosen for the outer Nb3Sn coil of 80-mm bore, and an (NbTi)3Sn wire made by the high-tin-content Nb tube method was used to build the inner Nb3Sn coil. The NbTi-Nb 3 magnet system has successfully achieved a 14.42 T central field at 4.2 K. To obtain a higher magnetic field, a pair of low-purity holmium cores of 25-mm diameter were used. The test of the NbTi-Nb3 Sn magnet with the holmium cores shows that the central field increases from 14 T to 17 T at 4.2 K
Keywords :
ferromagnetic properties of substances; holmium; magnetic cores; niobium compounds; superconducting magnets; type II superconductors; 14 to 17 T; 25 mm; 31 mm; 4.2 K; 80 mm; Nb3Sn coil; NbTi; NbTi-Nb3Sn superconducting magnet; bore; central field; low-purity Ho ferromagnetic core; magnetic field; superconducting magnet system; three coils; Boring; Magnetic cores; Magnetic fields; Niobium compounds; Superconducting coils; Superconducting magnets; System testing; Tin; Titanium compounds; Wire;
Journal_Title :
Magnetics, IEEE Transactions on
