Development and quality control of the superconductors for the helical coils of LHD

被引：18
作者：
Yanagi, N [1 ]
Mito, T [1 ]
Imagawa, S [1 ]
Takahata, K [1 ]
Satow, T [1 ]
Yamamoto, J [1 ]
Motojima, O [1 ]
机构：
[1] Natl Inst Fus Sci, Gifu 50952, Japan
来源：
FUSION ENGINEERING AND DESIGN | 1998年 / 41卷
关键词：
D O I：
10.1016/S0920-3796(98)00118-5
中图分类号：
TL [原子能技术]; O571 [原子核物理学];
学科分类号：
0827 ; 082701 ;
摘要：
A composite-type superconductor with NbTi/Cu compacted strands and aluminum/copper stabilizers has been developed for the pool-cooled helical coils of the Large Helical Device. The internal configuration of the conductor was determined from the viewpoint of high stability performance and fabrication reliability, by incorporating some newly developed techniques, such as a Cu-2%Ni-clad pure aluminum stabilizer and electron beam welding of the half-hard copper sheath. The conductor has been fabricated over the total length of 36 km under careful inspections both on the component materials and on the final full-conductors from the viewpoint of quality control. Short sample tests of the conductors showed that the measured critical currents and the recovery currents satisfied the specified values for the Phase I operation condition of LHD, although they showed some scattering around their mean values. (C) 1998 Elsevier Science S.A. All rights reserved.
引用
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页码：241 / 246
页数：6
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