Suppressing Screening-Current-Induced Strain in a 72-mm-Bore REBCO Insert for a 20-T Magnet: A Numerical Study

IF 1.7 3区物理与天体物理 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Applied Superconductivity Pub Date : 2025-02-06 DOI:10.1109/TASC.2025.3539257

Yi Li;Siwei Chen;Jonathan Dye;Piotr Bunkowski;Bruce Berlinger;Ryan Matthiessen;Yuhu Zhai

{"title":"Suppressing Screening-Current-Induced Strain in a 72-mm-Bore REBCO Insert for a 20-T Magnet: A Numerical Study","authors":"Yi Li;Siwei Chen;Jonathan Dye;Piotr Bunkowski;Bruce Berlinger;Ryan Matthiessen;Yuhu Zhai","doi":"10.1109/TASC.2025.3539257","DOIUrl":null,"url":null,"abstract":"Rare-earth barium copper oxide (REBCO) high-temperature superconducting (HTS) magnets are considered a game changer for the capability of generating magnetic fields exceeding 20 T at or above liquid helium temperature, combined with the potential for substantially reduced manufacturing and operational costs. Princeton Plasma Physics Laboratory is dedicated to developing large-bore high-field superconducting magnet systems to support forefront physics research. Our current project focuses on a <inline-formula><tex-math>${\\mathrm{\\phi }}$</tex-math></inline-formula>72-mm cold-bore REBCO insert comprising 21 dry-wound double-pancake coils, designed to generate at least 8 T when nested within a 12-T outsert magnet. A significant challenge for high-field REBCO magnets is the time-varying-magnetic-field-induced screening currents (SC) in the REBCO conductors, which can cause localized strain and stress concentrations. This paper presents a numerical study of the SC-induced strain in the REBCO insert magnet, confirming that the SC-induced strain can be substantially suppressed by energizing the REBCO insert before the outsert magnets. We discuss and reveal the mechanism behind this reduction. By applying this strategy, we expect to unleash the potential of the REBCO insert magnet to generate up to 12 T in a 12-T background field.","PeriodicalId":13104,"journal":{"name":"IEEE Transactions on Applied Superconductivity","volume":"35 5","pages":"1-5"},"PeriodicalIF":1.7000,"publicationDate":"2025-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Transactions on Applied Superconductivity","FirstCategoryId":"101","ListUrlMain":"https://ieeexplore.ieee.org/document/10876601/","RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"ENGINEERING, ELECTRICAL & ELECTRONIC","Score":null,"Total":0}

引用次数: 0

Abstract

Rare-earth barium copper oxide (REBCO) high-temperature superconducting (HTS) magnets are considered a game changer for the capability of generating magnetic fields exceeding 20 T at or above liquid helium temperature, combined with the potential for substantially reduced manufacturing and operational costs. Princeton Plasma Physics Laboratory is dedicated to developing large-bore high-field superconducting magnet systems to support forefront physics research. Our current project focuses on a

${\mathrm{\phi }}$

72-mm cold-bore REBCO insert comprising 21 dry-wound double-pancake coils, designed to generate at least 8 T when nested within a 12-T outsert magnet. A significant challenge for high-field REBCO magnets is the time-varying-magnetic-field-induced screening currents (SC) in the REBCO conductors, which can cause localized strain and stress concentrations. This paper presents a numerical study of the SC-induced strain in the REBCO insert magnet, confirming that the SC-induced strain can be substantially suppressed by energizing the REBCO insert before the outsert magnets. We discuss and reveal the mechanism behind this reduction. By applying this strategy, we expect to unleash the potential of the REBCO insert magnet to generate up to 12 T in a 12-T background field.

查看原文本刊更多论文

稀土钡铜氧化物（REBCO）高温超导（HTS）磁体能够在液氦温度或更高的温度下产生超过 20 T 的磁场，并具有大幅降低制造和运营成本的潜力，因此被认为是改变游戏规则的重要因素。普林斯顿等离子体物理实验室致力于开发大口径高磁场超导磁体系统，以支持前沿物理研究。我们目前的项目重点是一个 ${\mathrm\{phi }}$72 毫米的冷内孔 REBCO 插入件，它由 21 个干绕双饼线圈组成，当嵌套在一个 12 T 的外置磁体中时，可产生至少 8 T 的磁场。高磁场 REBCO 磁体面临的一个重大挑战是 REBCO 导体中由时变磁场引起的屏蔽电流 (SC)，它会导致局部应变和应力集中。本文对 REBCO 插入式磁体中 SC 诱导的应变进行了数值研究，结果证实，在外置磁体之前给 REBCO 插入式磁体通电，可以大大抑制 SC 诱导的应变。我们讨论并揭示了这种减少背后的机制。通过应用这一策略，我们有望释放 REBCO 插入式磁体的潜力，在 12 T 背景场中产生高达 12 T 的磁场。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

IEEE Transactions on Applied Superconductivity 工程技术-工程：电子与电气

CiteScore

3.50

自引率

33.30%

发文量

650

审稿时长

2.3 months

期刊介绍： IEEE Transactions on Applied Superconductivity (TAS) contains articles on the applications of superconductivity and other relevant technology. Electronic applications include analog and digital circuits employing thin films and active devices such as Josephson junctions. Large scale applications include magnets for power applications such as motors and generators, for magnetic resonance, for accelerators, and cable applications such as power transmission.