Design and fabrication of module coil as an R&D program for Large Helical Device

Author

Mito, T. ; Yamamoto, J. ; Takahata, K. ; Yanagi, N. ; Motojima, O. ; Ichihara, T. ; Toyoda, K. ; Minato, T. ; Sasaki, T.

Author_Institution

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

Volume

27

Issue

2

fYear

1991

fDate

3/1/1991 12:00:00 AM

Firstpage

2361

Lastpage

2364

Abstract

A twisted solenoid coil (TOKI-MC) has been designed and fabricated in order to study the mechanical properties of the Large Helical Device (LHD). One of the most important R&D items of the LHD is the mechanical behavior of the helical coils under a large electromagnetic force. The TOKI-MC was wound obliquely on the 3D-machined elliptical bobbin with a maximum torsional rate of 36°/m at the innermost conductor. The maximum field in the coil is 7.7 T with an operating current of 20 kA, an average current density of 40 A/mm², and a stored energy of 11 MJ. The TOKI-MC can simulate the electromagnetic force, conductor torsional rate, magnetic field, operating current, and current density of the LHD superconducting helical coils. The design and test results of the conductor and the design and fabrication of the coil are described

Keywords

coils; fusion reactor theory and design; solenoids; superconducting magnets; 11 MJ; 20 kA; 3D-machined elliptical bobbin; 7.7 T; LHD; Large Helical Device; TOKI-MC; electromagnetic force; maximum torsional rate; mechanical properties; module coil; stored energy; twisted solenoid coil; Conductors; Current density; Electromagnetic forces; Fabrication; Magnetic fields; Mechanical factors; Solenoids; Superconducting coils; Testing; Wounds;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.133692

Filename

133692