Analysis of Screening Current Effects in a Hybrid Nb3Sn/REBCO Superconducting Accelerator Magnet Using a T-A Formulation

被引：0

作者：

Yang, Ye ^{[1
]}

Yan, Yufan ^{[1
]}

Kurian, Febin ^{[2
]}

Dhakarwal, Mukesh ^{[3
]}

Iio, Masami ^{[3
]}

Suzuki, Kento ^{[3
]}

Wang, Xiaorong ^{[1
]}

Gupta, Ramesh ^{[2
]}

Ogitsu, Toru ^{[3
]}

Shen, Tengming

机构：

[1] Lawrence Berkeley Natl Lab, Berkeley, CA 94720 USA

[2] Brookhaven Natl Lab, Upton, NY 11973 USA

[3] High Energy Accelerator Res Org KEK, Tsukuba, Ibaraki 3050801, Japan

来源：

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY | 2025年 / 35卷 / 05期

关键词：

High-temperature superconductors; Superconducting magnets; Coils; Magnetomechanical effects; Magnetic resonance; Magnetic fields; Superconductivity; Stress; Accelerator magnets; Vectors; common-coil dipole; HTS insert coil; hybrid magnet; screening current;

D O I：

10.1109/TASC.2025.3528378

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

To explore the feasibility of using high-temperature superconducting (HTS) REBCO coated conductors in future accelerator magnets, two REBCO flat racetrack coils were fabricated using 4-mm wide EuBCO tapes at the High Energy Accelerator Research Organization (KEK). These coils were tested as an insert inside a Nb3Sn common-coil dipole magnet, which provides a background field of up to similar to 9.5T, at the Brookhaven National Laboratory (BNL). REBCO tapes offer exceptionally high critical current density under strong magnetic fields; however, they also exhibit significant magnetization due to screening currents, leading to magnetic field errors. This study presents a 2D finite element model of screening current-induced fields (SCIF) in REBCO coils using the T-A formulation, along with the results obtained. Simulations were then performed for two KEK test cases: one where the REBCO conductors were oriented with the HTS tapes parallel to the background field, and another where the tapes were perpendicular to it. Since screening currents also influence the stress distribution and increase the peak stress in the coils, the mechanical effects of these currents were analyzed. The implications of these simulation and test results for the design of Nb3Sn/REBCO superconducting accelerator magnets are discussed.

引用

页数：5

共 22 条

[21] Analysis of the Magnetization-Induced Field Error in a Superconducting Bending Magnet for a Compact, Rapid-Cycling Heavy-Ion Synchrotron [J].