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

Volume

25

Issue

2

fYear

1989

fDate

3/1/1989 12:00:00 AM

Firstpage

1721

Lastpage

1724

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;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.92633

Filename

92633