Development and tests of a flexible superconducting bus-line for the Large Helical Device

Author

Mito, Toshiyuki ; Yamada, Shuichi ; Takahata, Kazuya ; Yanagi, Nagato ; Chikaraishi, Hirotaka ; Nishimura, Arata ; Tanahashi, Shugo ; Motojima, Osamu ; Yamamoto, Junya ; Uede, Toshio ; Hiue, Hisaaki ; Ueda, Kazuo ; Itoh, I. ; Ikeda, Masaru ; Inoue, Itaru

Author_Institution

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

Volume

30

Issue

4

fYear

1994

fDate

7/1/1994 12:00:00 AM

Firstpage

2090

Lastpage

2093

Abstract

A flexible superconducting bus-line is proposed as an electrical feeder between the superconducting coils of the Large Helical Device (LHD) and the device´s power supplies. The bus-line consists of superconducting cables and a cryogenic flexible transfer-line. A specially developed aluminum stabilized NbTi/Cu compacted strand cable satisfies requirements for large current capacity, high stability, high reliability and flexibility. A full-scale model with a length of 20 m was designed and constructed to investigate the feasibility and performance of the superconducting bus-line. Its fabrication, transportation, installation, cooling and excitation tests were successfully carried out. The bus-line was very stable and could be excited up to 40 kA (rated current is 30 kA) without a quench. The stability, current distribution and heat load were also measured

Keywords

busbars; copper; current distribution; fusion reactor theory and design; niobium alloys; superconducting cables; titanium alloys; type II superconductors; 20 m; 40 kA; LHD; Large Helical Device; NbTi-Cu; NbTi/Cu; current distribution; electrical feeder; flexible superconducting bus-line; heat load; stability; superconducting cables; superconducting coils; Aluminum; Cryogenics; Niobium compounds; Power cables; Power supplies; Stability; Superconducting cables; Superconducting coils; Testing; Titanium compounds;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.305681

Filename

305681