Mechanical and electromagnetic characteristics of MgB2 wires & Cable-in-Conduit Conductors for fusion magnet application

IF 5.6 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC

Superconductivity Pub Date : 2025-03-01 DOI:10.1016/j.supcon.2025.100155

Peng Gao , Jiahao Wan , Yishan Chen , Hongjun Ma , Weijun Wang , Xintao Zhang , Chao Dai , Tianli Dai , Yu Min , Arend Nijhuis , Matt Rindfleisch , Mike Tomsic , Huan Jin , Huajun Liu , Liu Fang , Jinggang Qin , Chao Zhou

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Abstract

A study on a 4-stage sub-size MgB ₂ Cable-in-Conduit Conductor (CICC), tested at the Institute of Plasma Physics, Chinese Academy of Sciences (ASIPP), revealed a 20% degradation in critical current at 4.2 K compared to single-strand data. To address this issue, the mechanical properties of MgB ₂ wires from Hyper Tech and WST were investigated, and two sub-size CICCs were manufactured using a “close-to-1-ratio” Twente design with smaller diameter wires. These cables demonstrated no significant degradation in critical current after cabling and compaction, nor after electromagnetic load cycling. The results indicate that the close-to-1-ratio cable design is optimal for brittle superconducting materials such as MgB ₂, Nb₃Sn, and BSCCO, as it minimizes mechanical stress and preserves superconducting properties. This design shows significant potential for the application of MgB ₂ in next-generation fusion reactors, particularly in Poloidal Field (PF) coils, Correction Coils (CC), and feeders.

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熔合磁体用MgB2导线和导管内电缆导体的机械和电磁特性

在中国科学院（ASIPP）等离子体物理研究所进行的一项关于4级亚尺寸mgb2导管内电缆导体（CICC）的研究表明，与单股数据相比，4.2 K时的临界电流降低了20%。为了解决这一问题，研究了来自Hyper Tech和WST的mgb2钢丝的力学性能，并使用“接近1比”的Twente设计制造了两个亚尺寸的CICCs，钢丝直径较小。这些电缆在布线和压实后没有显着的临界电流退化，也没有经过电磁负载循环。结果表明，对于脆性超导材料，如mgb2、Nb3Sn和BSCCO，接近1比的电缆设计是最佳的，因为它可以最小化机械应力并保持超导性能。该设计显示了mgb2在下一代聚变反应堆中的巨大应用潜力，特别是在极向场（PF）线圈、校正线圈（CC）和馈线中。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Superconductivity

CiteScore

3.90

自引率

0.00%

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