中国散裂中子源(CSNS)加速器主要由一台直线加速器、一台快循环加速器以及低能、高能输运线组成。针对CSNS加速器部分直流磁铁研制了一套旋转线圈测量系统。对系统的研制方案、功能、精度、完成的磁铁类型以及部分测量结果进行介绍。该系统解决了CSNS批量磁铁之间的不同中心高度、质量、有效长度、磁场强度的兼容性难题。经过测试运行, 积分场测量重复性误差好于±0.02%, 空间谐波重复性误差好于0.005%, 磁中心测量重复性误差好于±0.03 mm, 顺利完成了中国散裂中子源工程150台多种类型磁铁的检测任务。

The China Spallation Neutron Source (CSNS) accelerator mainly consists of a linear accelerator, a 1.6 GeV rapid cycling synchrotron (RCS), a low energy transport line and a high energy transport line. A rotating coil measurement system was developed for the DC magnets of the CSNS accelerator. This system solves the compatibility problems of different center heights, masses, effective lengths, and magnetic field strengths among CSNS bulk magnets. After testing, the repeatability error of the integral field measurement is less than ±0.02%, the repeatability error of harmonics is less than 0.005%, the repeatability error of the magnetic center measurement is less than ±0.03mm. It has successfully completed the task of detecting 150 magnets of the China Spallation Neutron Source. In this paper, the development plan, function, accuracy, types of measured magnets and some measurement results are introduced.