Title :
Development of a compact 18-T MF-(NbTi)3Sn coil
Author :
Nishi, M. ; Isono, T. ; Takahashi, Y. ; Ando, T. ; Tsuji, H. ; Uchiyama, T. ; Aoki, N. ; Ichihara, M. ; Suzuki, E.
Author_Institution :
JAERI, Ibaraki, Japan
fDate :
3/1/1991 12:00:00 AM
Abstract :
The magnetic flux density of 18.4 T at 4.2 K was obtained by a 32-mm-bore superconducting coil wound with two grades of tube-processed multifilamentary (NbTi)3Sn superconductors in a background field of 13.2 T. The average current density values of this coil were 70 A/mm2 in the 18.4 T region and 107 A/mm2 in the region less than 16.7 T. The energy stored in the 18-T coil system including background field coils was only 1.48 MJ at 18.4 T. The charging time of this system from 0 T to 18 T is only 12 min. This success encourages the development of high-performance superconductors for the high-field large coils of future thermonuclear fusion machines
Keywords :
coils; composite superconductors; fusion reactor theory and design; niobium alloys; superconducting magnets; (NbTi)3Sn; 18.4 T; 4.2 K; background field; charging time; current density; high-performance superconductors; multifilamentary superconducting; superconducting coil; thermonuclear fusion machines; Current density; Fusion reactors; Magnetic flux density; Multifilamentary superconductors; Niobium compounds; Superconducting coils; Superconductivity; Tin; Titanium compounds; Wounds;
Journal_Title :
Magnetics, IEEE Transactions on
