Abstract

The High-Temperature Superconducting (HTS) magnet option has been explored for fusion reactors as well as for next-generation fusion experimental devices. The Stacked Tapes Assembled in Rigid Structure (STARS) conductor uses HTS tapes with simple stacking without twisting and transposition. A practically applicable STARS conductor is presently being developed with an operating current of 18 kA at 20 K temperature and ~15 T magnetic field. The conductor is required to have a high current density of 80 A/mm2. For the second stage of the conductor development, internal electrical insulation is applied between the copper stabilizer casing and the outer stainless-steel jacket, and a 6-m conductor sample was fabricated in a solenoid coil shape with a 600-mm diameter and three turns. The coiled sample was tested in 8 T, 20 K using a facility equipped with a maximum 13-T, 700-mm bore solenoid coil. Excitation up to the rated current of 18 kA was successfully attained with stable operation. The characteristics of the conductor observed during the excitation test are discussed.

Details

Title
Stable operation characteristics and perspectives of the large-current HTS STARS conductor
Author
Yanagi, N 1 ; Narushima, Y 1 ; Onodera, Y 1 ; Garfias-Dávalos, D 2 ; Ito, S 3 ; Terazaki, Y 4 ; Hamaguchi, S 1 ; Chikaraishi, H 4 ; Takada, S 1 ; Hirano, N 1 ; Takahata, K 1 

 National Institute for Fusion Science , 322-6 Oroshi-cho, Toki, Gifu 509-5292 , Japan; The Graduate University for Advanced Studies , SOKENDAI, 322-6 Oroshi-cho, Toki, Gifu 509-5292 , Japan 
 The Graduate University for Advanced Studies , SOKENDAI, 322-6 Oroshi-cho, Toki, Gifu 509-5292 , Japan 
 Tohoku University , 6-6-01-2 Aramaki-Aza-Aoba, Aoba-ku, Sendai, Miyagi 982-8579 , Japan 
 National Institute for Fusion Science , 322-6 Oroshi-cho, Toki, Gifu 509-5292 , Japan 
First page
012008
Publication year
2023
Publication date
Jul 2023
Publisher
IOP Publishing
ISSN
17426588
e-ISSN
17426596
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2847880221
Copyright
Published under licence by IOP Publishing Ltd. This work is published under http://creativecommons.org/licenses/by/3.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.