<br>SPARC 环形场模型线圈的实验评估和模型验证,IEEE Transactions on Applied Superconductivity

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SPARC 环形场模型线圈的实验评估和模型验证
IEEE Transactions on Applied Superconductivity ( IF 1.7 ) Pub Date : 2023-11-14 , DOI: 10.1109/tasc.2023.3332823
D.G. Whyte ₁ , B. LaBombard ₁ , J. Doody ₁ , T. Golfinopolous ₁ , R. Granetz ₁ , C. Lammi ₂ , S. Lane-Walsh ₁ , P. Michael ₁ , T. Mouratidis ₁ , R. Mumgaard ₂ , J.P. Muncks ₂ , D. Nash ₂ , N. Riva ₁ , F. Santoro ₁ , A. Sattarov ₂ , J. Stillerman ₁ , K. Uppalapati ₂ , R. Vieira ₁ , A. Watterson ₁ , S. Wilcox ₂ , Z.S. Hartwig ₁

Affiliation

本文介绍了 SPARC 环形场模型线圈 (TFMC) 实验测试。测试包括对线圈的电磁和结构模型层次结构的详细比较。测试证实了无绝缘无扭 (NINT) 配置能够在稀土钇钡铜氧化物 (REBCO) 磁带叠层上提供高度稳定的直流操作，峰值磁场超过 20 T。模块化 TFMC 方法的优势得到了验证，包括能够分阶段测试和探测线圈的 REBCO 和结构响应，该策略将应用于 SPARC 的大规模线圈生产。电磁模型在电流分布、电压和发热方面表现出与直流和充电线圈性能高度保真的一致性。检查 TFMC 对开路事件的瞬态响应。该线圈展现了 NINT 设计的优点，具有非常低的感应电压和可预测的电流重新分布以及由此产生的体积加热。然而，在类似于 SPARC 托卡马克中使用的操作条件下，在编程开路期间会发生高度局部的损坏，这与校准的电磁模型一致。这揭示了引起损坏的热不稳定性的原因和补救措施。因此，测试的结论是，NINT TFMC 被确认满足 SPARC 以及更广泛的高场托卡马克的程序要求。

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Experimental Assessment and Model Validation of the SPARC Toroidal Field Model Coil

In this article, the SPARC Toroidal Field Model Coil (TFMC) experimental tests are described. The tests include detailed comparisons to a hierarchy of electromagnetic and structural models of the coil. The tests confirm the ability of the no-insulation no-twist (NINT) configuration to provide highly stable dc operations with peak magnetic field in excess of 20 T at the rare earth yttrium barium copper oxide (REBCO) tape stacks. The advantages of the modular TFMC approach are validated including the ability to test and probe the REBCO and structural response of the coil in stages, a strategy that will be applied to large-scale coil production for SPARC. The electromagnetic models show high fidelity agreement to the dc and charging coil performance in terms of current distribution, voltages, and heating. The transient response of the TFMC to open-circuit events is examined. The coil exhibits the positive features of the NINT design with very low induced voltages and a predictable redistribution of current and resulting volumetric heating. However, highly localized damage occurs during a programmed open circuit at operational conditions similar to those used in the SPARC tokamak, in agreement with calibrated electromagnetic models. This reveals the cause and remedy to the thermal instability that gives rise to the damage. Therefore, the conclusion of the tests is that the NINT TFMC is confirmed as meeting the programmatic requirements for SPARC and, more generally, for high-field tokamaks.

更新日期：2023-11-14

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