Development of forced-cooled superconducting coil for Large Helical Device

Author

Wachi, Y. ; Shimada, M. ; Nakamoto, K. ; Shibui, M. ; Hamajima, T. ; Ioka, S. ; Motojima, O. ; Yamamoto, J. ; Takeo, M. ; Mito, T. ; Takahata, K.

Author_Institution

Toshiba Corp., Yokohama, Japan

Volume

27

Issue

2

fYear

1991

fDate

3/1/1991 12:00:00 AM

Firstpage

2228

Lastpage

2231

Abstract

A force-cooled superconducting coil has been studied for the Large Helical Device (LHD), which will be a main experimental apparatus of the Japanese National Institute for Fusion Science (NIFS). To achieve the main requirements for the LHD, a large-current, high-current-density NbTi cable-in-conduit-type conductor of 10 kA and 47 A/mm² at 8 T was developed. The test coil was wound in the form of a one-layer solenoid and tested at an operating current of 10 kA in a superposed field of about 7 T, at a hydraulic condition of 1.0 MPa, 4.5 K, and 10 g/s supercritical helium. The stability, normal propagation velocity, and pressure rise during a quench for the high-current-density case were also studied

Keywords

cooling; fusion reactor theory and design; solenoids; stability; superconducting magnets; 1 MPa; 10 kA; 4.5 K; 7 to 8 T; LHD; Large Helical Device; NbTi; cable-in-conduit-type conductor; experimental apparatus; forced-cooled; high-current-density case; hydraulic condition; normal propagation velocity; one-layer solenoid; pressure rise; quench; stability; superconducting coil; supercritical He; Conductors; Helium; Niobium compounds; Solenoids; Stability; Superconducting cables; Superconducting coils; Testing; Titanium compounds; Wounds;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.133658

Filename

133658