Stability tests of the Nb-Ti cable-in-conduit superconductor with bare strands for demonstration of the Large Helical Device poloidal field coils

Author

Takahata, K. ; Mito, T. ; Satow, T. ; Yanagi, N. ; Sakamoto, M. ; Yamada, S. ; Nishimura, A. ; Yamamoto, J. ; Motojima, O. ; Ogata, H. ; Yoshida, T. ; Ono, M. ; Takano, H. ; Ioka, S. ; Aoki, N. ; Lue, W. ; Kasao

Author_Institution

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

Volume

30

Issue

4

fYear

1994

fDate

7/1/1994 12:00:00 AM

Firstpage

1705

Lastpage

1709

Abstract

Stability and quench experiments of a Nb-Ti cable-in-conduit superconductor with bare strands have been carried out to determine the performance of the poloidal coil for the Large Helical Device (LHD). The conductor was formed into a double-pancake coil named IV-S and was mounted on TOKI-PF-a previously tested R&D coil. In excitation tests at 7.4-8.3 K, the IV-S coil reached the critical currents without premature quenches. Stability tests at 7.5 K indicated that the limiting current exceeds 20 kA, which is the nominal operating current of the LHD poloidal coils. These results demonstrated that the stability of the chosen conductor with bare strands is high enough for the LHD

Keywords

Tokamak devices; critical current density (superconductivity); fusion reactor theory and design; stability; superconducting magnets; 20 kA; 7.4 to 8.3 K; IV-S coil; LHD poloidal coils; Large Helical Device; Nb-Ti; bare strands; cable-in-conduit superconductor; double-pancake coil; limiting current; poloidal coil; poloidal field coils; quench experiments; stability tests; Coatings; Conducting materials; Conductors; Research and development; Stability; Superconducting cables; Superconducting coils; Superconducting materials; Testing; Wire;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.305584

Filename

305584