高场强超导二极磁体（铁）是高能量加速器的核心部件之一，且加速器的能量与二极磁体的场强成正比。高温超导线材具有极高的上临界场，采用高温超导内插线圈的磁体可以突破基于NbTi, Nb3Sn线材技术的临界磁场的限制，进一步提升其场强。但高温超导线圈中的持续电流（屏蔽电流）效应会对磁体的场均匀度造成干扰，成为限制其在加速器超导二极磁体中得到应用的关键问题之一。本课题将利用数值分析及相关实验方法，同时借助于一台高场强超导二极磁体LPF3的制作及测试平台，对ReBCO高温超导内插线圈的持续电流效应进行探究，提出抑制方法来解决这一难题。同时还将对ReBCO线圈制作的关键技术进行探究，并充分利用其平行场下载流能力更高的特性，设计并研制出满足场均匀度要求的内插于LPF3的线圈，实现高温超导线圈在加速器磁体上的应用，为更高场强超导二极磁体的研制奠定基础。本项目的开展将会促进我国在加速器磁体技术研究领域的进步。

High field superconducting dipole magnets are the key components of high energy particle accelerators. There would be a larger center-of-mass energy in proton collisions when the field strength in dipole magnets is higher. The field strength in dipole magnets could be increased greatly with the application of HTS (high temperature superconductor) insert-coils for its excellent performance at high field. The persistent current (shielding current) effect in HTS like ReBCO coils is always a critical issue for the application of HTS coils in high field dipole magnets as it would distort the field quality. Together with the fabrication of a high field dipole magnet named LPF3, the mitigation method of SCIF (shielding-current-induced field) in HTS insert-coils would be studied in this proposal. Also the investigation of key processing techniques for HTS coils fabrication and test would be carried out. The advantage of higher current carrying capability in ReBCO when the field is parallel to its wide faces would be taken into full consideration. The study carried out in this proposal would be beneficial to the further development of the accelerator magnets technology.