Title :
Development of a forced-cooled superconducting coil with high average current density (DPC-TJ)
Author :
Hamajima, T. ; Tanaka, A. ; Shiraki, H. ; Shibui, M. ; Sanada, Y. ; Naganuma, M. ; Shimada, M. ; Fujioka, T. ; Nishi, M. ; Nakajima, H. ; Koizumi, K. ; Takahashi, Y. ; Ando, T. ; Tsuji, H. ; Shimamoto, S.
Author_Institution :
Toshiba Corp., Yokohama, Japan
fDate :
3/1/1989 12:00:00 AM
Abstract :
A forced-cooled superconducting coil (DPC-TJ) using a double-walled cable-in-conduit, the so-called Performed Armor CICC, has been developed. The DPC-TJ is an advanced coil with an average current density of 40 A/mm2, operating current of 24 kA, and field of 12 T. The DPC-TJ coil has several advantages such as mechanical rigidity, negligible degradation of critical current, sound electrical insulation, and excellent winding tolerance compared with a conventional forced-cooled coil. A superconducting strand was developed with the aim of improving the critical current density and resistivity. The resulting Nb-tube-processed (NbTi)3Sn strand fulfils the requirement that the critical current density be more than 600 A/mm2 at 12 T and the RRR (residual resistivity ratio) be higher than 50
Keywords :
niobium compounds; superconducting magnets; type II superconductors; (NbTi)3Sn strand; 12 T; 24 kA; DPC-TJ; Demonstration Poloidal Coil; Performed Armor CICC; RRR; critical current density; double-walled cable-in-conduit; field; forced-cooled coil; forced-cooled superconducting coil; high average current density; mechanical rigidity; negligible degradation of critical current; operating current; residual resistivity ratio; sound electrical insulation; superconducting strand; winding tolerance; Conductivity; Critical current; Critical current density; Current density; Degradation; Dielectrics and electrical insulation; Niobium compounds; Superconducting cables; Superconducting coils; Titanium compounds;
Journal_Title :
Magnetics, IEEE Transactions on
