改进跨变温区域的多盘片线圈临界电流预测

IF 1.3 3区 物理与天体物理 Q4 PHYSICS, APPLIED Physica C-superconductivity and Its Applications Pub Date : 2024-08-22 DOI:10.1016/j.physc.2024.1354568
Hao Dong , Daxing Huang , Hao Yu , Hongwei Gu , Fazhu Ding
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引用次数: 0

摘要

随着第二代高温超导(2G-HTS)磁带性能的不断提高,全 REBa2Cu3O7-δ(REBCO,RE:稀土)超导磁体技术也得到了快速发展。然而,带有混合低温冷却器的 2G-HTS 磁体会根据实际需求不断调整其工作温度,这就涉及到磁体跨越变温区域时的临界电流。本文提出了一种基于均质化模型的修正理想模型,该模型可以更稳定地预测 2G-HTS 磁体的临界电流。物理特性测量系统测试了 REBCO 磁带在变温区域的场内特性。此外,将改进模型与 REBCO 磁带的场内特性相结合,得到了 2G-HTS 多饼(MP)线圈在 20 K、30 K、65 K 和 77 K 下的临界电流。修改后的理想模型使用了实际电流密度,结果与实验结果更接近,吻合度高达 97.3%。这项工作中提出的新方法对于快速预测跨变温区域 2G-HTS 磁体的临界电流具有重要意义。
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Improved prediction of critical currents for multi-pancake coil across variable temperature regions

With the increasing performance of the second-generation high-temperature superconducting (2G-HTS) tapes, the technology of all-REBa2Cu3O7-δ (REBCO, RE: rare earth) superconducting magnets has developed rapidly. However, the 2G-HTS magnet with hybrid cryocoolers constantly adjusts its operating temperature according to the actual demands, which involves the critical current when the magnet crosses variable temperature regions. In this paper, a modified ideal model based on the homogenization model is proposed, which can predict the critical current of 2G-HTS magnets more consistently. The in-field properties of REBCO tapes in variable temperature regions were tested by the physical property measurement system. Furthermore, the improved model was combined with the in-field properties of REBCO tapes to obtain the critical currents of a 2G-HTS multi-pancake (MP) coil at 20 K, 30 K, 65 K, and 77 K. The critical current of a multi-pancake coil at 77 K was experimentally verified. The modified ideal model uses the actual current density, which results are closer to the experimental results with an agreement of 97.3%. This new method proposed in this work is significant in quickly predicting critical currents for 2G-HTS magnets across variable temperature regions.

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来源期刊
CiteScore
2.70
自引率
11.80%
发文量
102
审稿时长
66 days
期刊介绍: Physica C (Superconductivity and its Applications) publishes peer-reviewed papers on novel developments in the field of superconductivity. Topics include discovery of new superconducting materials and elucidation of their mechanisms, physics of vortex matter, enhancement of critical properties of superconductors, identification of novel properties and processing methods that improve their performance and promote new routes to applications of superconductivity. The main goal of the journal is to publish: 1. Papers that substantially increase the understanding of the fundamental aspects and mechanisms of superconductivity and vortex matter through theoretical and experimental methods. 2. Papers that report on novel physical properties and processing of materials that substantially enhance their critical performance. 3. Papers that promote new or improved routes to applications of superconductivity and/or superconducting materials, and proof-of-concept novel proto-type superconducting devices. The editors of the journal will select papers that are well written and based on thorough research that provide truly novel insights.
期刊最新文献
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