Development of a Magnetic Field Measurement System for a REBCO Bulk Superconducting Undulator at SXFEL

IF 1.8 3区物理与天体物理 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

IEEE Transactions on Applied Superconductivity Pub Date : 2026-08-01 Epub Date: 2026-03-06 DOI:10.1109/TASC.2026.3670796

Chan Liu;Dabin Wei;Zhuangwei Chen;Yimin Tong;Marco Calvi;Kai Zhang

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Abstract

The Shanghai Soft X-ray Free-Electron Laser (SXFEL) facility is currently developing a high-temperature superconducting (HTS) undulator employing a staggered-array configuration of RE-Ba-Cu-O (REBCO) bulks. This prototype device, designated HTSU12, consists of 50 periods with a period length of 12 mm and a clear vacuum aperture of 4.3 mm. This ultra-narrow aperture imposes significant challenges in performing accurate magnetic characterization. To address this challenge and enable precise quantification of key performance parameters, specifically the phase error and field integral errors, a multifunctional high-precision magnetic field measurement system has been developed for in-vacuum characterization. It enables magnetic field scanning with a Hall probe and integral field measurements using a stretched wire. This paper presents a comprehensive description of the magnetic field measurement system, including its overall design, mechanical implementation, and integration of measurement and control functionalities.

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SXFEL REBCO体超导波动器磁场测量系统的研制

上海软x射线自由电子激光器（SXFEL）设施目前正在开发一种高温超导（HTS）波动器，采用RE-Ba-Cu-O （REBCO）块体的交错阵列配置。该原型装置命名为HTSU12，由50个周期组成，周期长度为12 mm，真空净孔径为4.3 mm。这种超窄孔径对进行精确的磁性表征提出了重大挑战。为了解决这一挑战并实现关键性能参数的精确量化，特别是相位误差和场积分误差，开发了一种用于真空表征的多功能高精度磁场测量系统。它可以使用霍尔探头进行磁场扫描，并使用拉伸线进行积分场测量。本文全面介绍了磁场测量系统的总体设计、机械实现以及测量与控制功能的集成。

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

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.