Development of superconducting conductors for Large Helical Device

Author

Mito, T. ; Yamamoto, J. ; Takahata, K. ; Yanagi, N. ; Motojima, O.

Author_Institution

Nat. Inst. of Fusion Sci., Nagoya, Japan

Volume

27

Issue

2

fYear

1991

fDate

3/1/1991 12:00:00 AM

Firstpage

2224

Lastpage

2227

Abstract

The superconducting helical coils of the Large Helical Device (LHD) require superconducting conductors with large current capacities (from 20 kA to 30 kA) and high current densities (55 A/mm² at 8 T). An NbTi superconductor/bin with pool boiling is being used because of the large electromagnetic force and the complicated helical windings. Several conductors are designed to show how the difference of the position of pure aluminum in the conductors affects the stability and the mechanical properties. Scaled-down R&D conductors with operational currents from 7 kA to 10 kA were made on an experimental basis. The superconducting characteristics, stability, and mechanical properties of these scaled-down conductors were tested. The design and the test results concerning the superconducting characteristics are described

Keywords

fusion reactor theory and design; superconducting magnets; 7 to 10 kA; Al; LHD; Large Helical Device; NbTi superconductor/bin; R&D conductors; helical coils; mechanical properties.; pool boiling; scaled-down conductors; stability; superconducting characteristics; superconducting conductors; windings; Conductors; Current density; Electromagnetic forces; Mechanical factors; Niobium compounds; Stability; Superconducting coils; Superconducting devices; Testing; Titanium compounds;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.133657

Filename

133657