Title :
Critical currents of Nb3Sn wires for the US-DPC coil
Author :
Takayasu, M. ; Gung, C.Y. ; Steeves, M.M. ; Hoenig, M.O. ; Hale, J.R. ; Smathers, D.B.
Author_Institution :
Plasma Fusion Center, MIT, Cambridge, MA, USA
fDate :
3/1/1991 12:00:00 AM
Abstract :
The critical current of titanium-alloyed internal-tin, jelly-roll Nb3Sn wire for use in the US Demonstration Poloidal Coil (US-DPC) was evaluated. It was confirmed from 14 randomly-selected samples that the critical-current values were uniform and consistent: the noncopper critical-current density was approximately 700 A/mm2 at 10 T and 4.2 K, in agreement with expectations. A 27-strand cable-in-conduit conductor (CICC) using the low-thermal-coefficient-of-expansion superalloy Incoloy 905 yielded a critical current 5-7% below the average value of the single-strand data
Keywords :
composite superconductors; critical current density (superconductivity); critical currents; fusion reactor theory and design; niobium alloys; superconducting magnets; tin alloys; type II superconductors; (NbTi)3Sn; 10 T; 4.2 K; A15 superconductor; Cu matrix; Cu-Nb3Sn; Demonstration Poloidal Coil; Nb3Sn wires; US-DPC coil; cable-in-conduit conductor; critical current; critical-current density; jelly-roll wire; Critical current; Current measurement; Length measurement; Magnetic field measurement; Niobium; Strain measurement; Testing; Tin; Voltage; Wires;
Journal_Title :
Magnetics, IEEE Transactions on
