Design and fabrication of pool cooled helical coil as an R&D program for Large Helical Device

Author

Yanagi, N. ; Takahata, K. ; Mito, T. ; Yamamoto, J. ; Motojima, O. ; Saito, R. ; Suzuki, S. ; Iida, F. ; Ogata, H.

Author_Institution

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

Volume

27

Issue

2

fYear

1991

fDate

3/1/1991 12:00:00 AM

Firstpage

2357

Lastpage

2360

Abstract

A pool-cooled NbTi superconducting helical coil system (named TOKI-HB) has been fabricated as part of one of the research and development programs for the Large Helical Device (LHD). The main purpose of the construction of this device is to build an entire pool-cooled superconducting helical coil system which is large enough to be extrapolable to LHD. The helical coil has a major radius of 0.8 m and a minor radius of 0.2 m with a helical pitch number of 3. An operating current of 8.9 kA produces a maximum magnetic field of 0.75 T at the geometrical center of the poloidal cross section and 3 T at the coil surface. Basic design concepts of the TOKI-HB device are described together with some issues of the fabrication

Keywords

coils; fusion reactor theory and design; niobium alloys; superconducting magnets; titanium alloys; type II superconductors; 0.75 T; 3 T; 8.9 kA; Large Helical Device; NbTi; TOKI-HB; coil surface; geometrical center; helical pitch number; major radius; minor radius; operating current; pool cooled helical coil; Cooling; Fabrication; Helium; Niobium compounds; Plasma confinement; Plasma devices; Research and development; Superconducting coils; Superconducting magnets; Toroidal magnetic fields;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.133691

Filename

133691