Experiments of the 1-m-bore, 30-kA superconducting demo poloidal coils

Author

Okuno, K. ; Tsuji, H. ; Takahashi, Y. ; Nakajima, H. ; Kato, T. ; Isono, T. ; Ando, T. ; Hiyama, T. ; Nishi, M. ; Tada, E. ; Yoshida, K. ; Koizumi, K. ; Kawano, K. ; Satoh, M. ; Yoshida, J. ; Itoh, N. ; Oshikiri, M. ; Nisugi, H. ; Konno, M. ; Kawagoe, E.

Author_Institution

JAERI, Ibaraki, Japan

fYear

1989

fDate

2-6 Oct 1989

Firstpage

776

Abstract

The first experiment on the Nb-Ti pulsed coils, DPC (demonstration poloidal coil)-U1 and -U2, was successfully performed. The coils have a cable-in-conduit conductor cooled by 4-K supercritical helium, and their windings have 1-m inner, and 2-m outer, diameters. Charging tests on the coils were performed in both DC and pulsed modes. In DC mode, the coils were charged individually to their design current of 30 kA, and attained a peak field of 5.2 T and a stored energy of 11 MJ. In pulsed mode, using the power supply of the JT-60, the designed pulsed field of 7 T/s were achieved by charging one of the two coils to its design current in 0.75 s. AC losses of the coil during the pulsed operation were confirmed to be quite small. Mechanical, thermal, and hydraulic properties were also analyzed on the basis of the experimental results

Keywords

fusion reactor theory and design; superconducting magnets; AC losses; DC mode; JT-60; Nb-Ti; cable-in-conduit conductor; design current; hydraulic properties; peak field; power supply; pulsed coils; pulsed modes; stored energy; superconducting demo poloidal coils; windings; Conductors; Cooling; Helium; Inductors; Mechanical factors; Performance evaluation; Pulsed power supplies; Superconducting coils; Testing; Tokamaks;

fLanguage

English

Publisher

ieee

Conference_Titel

Fusion Engineering, 1989. Proceedings., IEEE Thirteenth Symposium on

Conference_Location

Knoxville, TN

Type

conf

DOI

10.1109/FUSION.1989.102333

Filename

102333