The Facility for Rare Isotope Beams (FRIB) was funded by the U.S. Department of Energy, which is the world’s most powerful isotope beam device. We have developed an 8T superconducting solenoid magnet which is used to focus and steer the heavy ion beams for FRIB Driver Linac. The solenoid consists of a main focusing coil, two shielding coils and two pairs of corrector dipoles, fabricated by NbTi wire only. A helium vessel was designed and fabricated to accommodate the coils with an entire length of 652 mm with end flange. The magnet in an operating current of 89.6 A achieved the maximum magnetic field of 8T in 40-mm cold bore without quench. In this paper, the overall design of the whole magnet was introduced, including the magnetic design, mechanical design, quench simulation and the protection circuit. Moreover, the winding process and the test results were showed.

稀有同位素束设备（FRIB）由美国能源部资助，这是世界上功能最强大的同位素束设备。我们开发了8T超导螺线管磁体，用于聚焦和操纵FRIB驱动直线加速器的重离子束。螺线管由主聚焦线圈，两个屏蔽线圈和两对校正偶极子组成，仅由NbTi线制成。设计和制造了一个氦气容器，以容纳带末端法兰的全长652 mm的线圈。工作电流为89.6 A的磁体在40毫米冷膛中没有淬火的情况下获得了8T的最大磁场。本文介绍了整个磁体的总体设计，包括磁性设计，机械设计，失超仿真和保护电路。而且，