二极铁均匀场修正

HI-13串列加速器升级工程中的ISOL高质量分辨谱仪要求20000的质量分辨率， 分析磁铁磁场均匀性要求好于1×10-5。 要达到这样高的磁场均匀性， 必须对磁铁进行垫补。 介绍了二极铁表面线圈垫补均匀场的设计方法和制作工艺， 并且基于现有的一块C型二极铁对表面线圈垫补均匀场的方法进行了实验研究。 实验结果表明， 采用表面线圈垫补后， 场均匀性提高了一个数量级， 积分场的均匀性从5×10-4提高到3×10-5。 The mass resolving power of ISOL’s spectrometer for Beijing Radioactive Ion beam Facilities project is 20000， which requires the field uniformity of the magnet better than 1×10-5. To achieve such a high uniformity field，field optimize is indispensable. This paper presents the design method，manufacture techniques and experiment results of surface coils，which are set on pole face of a dipole to improve the magnetic field homogeneity. The integral field uniformity with surface coil is optimized to 3×10-5 from 5×10-4，which is improved roughly an order of magnitude.

Modification of Dipole Homogeneity Field

The mass resolving power of ISOL’s spectrometer for Beijing Radioactive Ion beam Facilities project is 20000， which requires the field uniformity of the magnet better than 1×10-5. To achieve such a high uniformity field，field optimize is indispensable. This paper presents the design method，manufacture techniques and experiment results of surface coils，which are set on pole face of a dipole to improve the magnetic field homogeneity. The integral field uniformity with surface coil is optimized to 3×10-5 from 5×10-4，which is improved roughly an order of magnitude.