面向未来聚变反应堆高场应用的首条80 kA高温超导导管电缆导体性能研究

工程（英文） ›› 2025, Vol. 55 ›› Issue (12) : 182 -190. DOI: 10.1016/j.eng.2025.05.015

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Performance of the First 80 kA HTS CICC for High-Field Application in Future Fusion Reactors

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Received	Accepted	Published
2024-11-13	2025-05-27
Issue Date
2025-06-25

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Abstract

A promising way to realize controlled nuclear fusion involves the use of magnetic fields to control and confine the hot plasma configuration. This approach requires superconductor magnets operating above 15 T for the next generation of fusion devices. Due to their high in-field transport current capacity, rare-Earth barium copper oxide (REBCO) coated conductors are promising materials for manufacturing of cable-in-conduit conductors (CICCs) for fusion. However, the high-aspect-ratio geometry makes it difficult to find a multi-tape CICC configuration that fulfills the high engineering current density requirements while retaining enough flexibility for winding large-scale magnets. Moreover, the multilayer structure and inherent brittleness make the REBCO tapes susceptible to degradation during CICC manufacturing and operation. For more than a decade, the development of a reliable REBCO-based CICC that can sustain the huge combined mechanical, thermal, and Lorentz loads without degradation has been ongoing, albeit with limited progress. In this paper, we report on a prototype REBCO CICC that can withstand an applied cyclic Lorentz load of at least 830 kN·m⁻¹, corresponding to a transport current of 80 kA at 10.85 T and 4.5 K. To our knowledge, this is the highest load achieved to date. The CICC uses 288 tapes wound into six strengthened sub-cables, making it capable of having a current sharing temperature, T_cs, of around 39 and 20 K when operated under 10.85 T with a current of 40 and 80 kA, respectively. Scaled to a 20-T peak field and 46.5-kA transport current, this provides a temperature margin of over 10 K with respect to an operating temperature of 4.5 K. In addition, no perceptible transport current performance degradation was observed after cyclic Lorentz loading, cyclic warm-up/cool-down (WUCD), and quench campaigns. The proposed REBCO CICC is a milestone in the development of high-temperature superconductors for large-scale and high-field magnet applications.

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Key words

Fusion magnet / High-temperature superconductor / REBCO CICC / Electromagnetic and thermal load / Operational stability

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Huan Jin,Guanyu Xiao,Chao Zhou,Chuanyi Zhao,Shijie Shi,Haihong Liu,Fang Liu,Huajun Liu,Yu Wu,Zuojiafeng Wu,Hugues Bajas,Jack Greenwood,Mattia Ortino,Kamil Sedlak,Valentina Corato,Richard Kamendje,Alexandre Torre,Arend Nijhuis,Giulio Anniballi,Arnaud Devred,Jinggang Qina,Yuntao Song,Jiangang Li. 面向未来聚变反应堆高场应用的首条80 kA高温超导导管电缆导体性能研究[J]. 工程（英文）, 2025, 55(12): 182-190 DOI:10.1016/j.eng.2025.05.015