二硼化镁（MgB2）是一种新型超导材料，具有较高的临界温度（39K），能够在高于液氦温区下运行，在稳定性和低温方面具有很大的优势，成为制作传导冷却无液氦超导磁体的最佳候选导体，在MRI等应用领域成为研究热点。如果将其应用于工业或医疗用的质子和碳离子加速器，有望大幅缩减加速器尺寸，降低建设成本和运行功耗。目前国际上基于二硼化镁的加速器磁体研究处于起步阶段，有很多问题需要深入研究。本项目针对研制二硼化镁加速器超导二极磁体所涉及的电磁结构、力学结构、加工工艺、运行特性等关键科学和技术问题开展系统的数值仿真和相关实验研究，并设计和研制一台二极磁体样机，进行相关测试和实验，为其在加速器中的实际应用提供技术基础和实验依据。

MgB2 is a new superconducting material. With a critical temperature of 39 K, MgB2 can operate at temperatures well above liquid-helium (LHe) temperatures, it's an important advantage for stability and cryogenic issues. This make it an good option for cryogen-free superconducting magnet in many application fields, including MRI. Superconducting magnet based on MgB2 is also a good choice for industry or medical particle accelerators to reduce footprint and operation costs. The study on the MgB2 based superconducting magnet for accelerator is still in the early stage and a lot of technical issues need to be studied. This project will investigate different aspects of scientific and technical issues related to the MgB2 based superconducting magnet, including EM design, stress analysis and mechanical structure optimization, fabrications, etc. In order to demonstrate the practical feasibility of superconducting magnets for accelerator based on MgB2, a prototype will be designed, fabricated and tested. The results will provide technical basis for future accelerator development.