Pancake-wound central solenoid coil for ITER

Author

Yoshida, K. ; Krivchenkov, Y. ; Kitamura, Kokoro ; Sborchia, C. ; Stepanov, Boris ; Kubo, Hiroshi ; Ohmori, J.

Author_Institution

ITER Joint Central Team, Naka, Japan

Volume

10

Issue

1

fYear

2000

fDate

3/1/2000 12:00:00 AM

Firstpage

576

Lastpage

579

Abstract

The central solenoid (CS) coil of the Reduced Technical Objective/Reduced Cost (RTO/RC) ITER is structurally independent from the toroidal magnet system and consists of 6 modules. The Nb/sub 3/Sn superconducting cable is a similar design to that of the CS model coil. The pancake-wound technique has been selected to allow non-uniform current distributions along the vertical axis since this is important for plasma shape control. The CS winding radial build should be minimized to provide as much flux as possible. Two alternatives for the CS conduit reinforcement are being considered: a co-wound reinforcing strip and a reinforcing armor around a circular tube. Separation forces between modules are supported by the axial pre-compression structure. The performance of the CS structure has been assessed using an axisymmetric finite element model of the winding structure at the CS mid-plane.

Keywords

Tokamak devices; finite element analysis; fusion reactor design; superconducting coils; superconducting magnets; ITER; Nb/sub 3/Sn; Nb/sub 3/Sn superconducting cable; Reduced Technical Objective/Reduced Cost; axial pre-compression structure; axisymmetric finite element model; central solenoid coil; co-wound reinforcing strip; pancake-wound; reinforcing armor; Costs; Magnetic flux; Magnetic separation; Niobium; Solenoids; Superconducting cables; Superconducting coils; Superconducting magnets; Tin; Toroidal magnetic fields;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.828300

Filename

828300