介绍了上海光源2台混合型真空室内波荡器IVU25用636件Sm2Co17永磁块(规格为65 mm×25 mm×8.965 mm)和1台APPLE-Ⅱ型椭圆极化波荡器EPU100用668件NdFeB永磁块(规格为35 mm×35 mm×25 mm)的研制情况。指出了影响剩磁离散性、磁化偏角、机械尺寸精度等技术要求的基本因素, 并对其原理进行了分析。研制的Sm2Co17和NdFeB永磁块的磁性能、磁场品质、机械尺寸精度等满足了上海光源首批波荡器插入件技术要求。

Two in-vacuum undulators IVU25s and one elliptically polarized undulator EPU100 have been developed for the Shanghai Synchrotron Radiation Facility (SSRF). Two IVU25s with the same hybrid design contain about 636 Sm2Co17 magnet blocks with the dimension of 65 mm×25 mm×8.965 mm. The EPU100 of the APPLE-Ⅱ type contains about 668 NdFeB magnet blocks with the dimension of 35 mm×35 mm×25 mm. This paper presents the development of these magnet blocks, points out the basic factors which affect remanence distribution, magnetization deviation angle and mechanical dimension precision, and analyzes the basic principles. The magnetic properties, magnetic field quality and mechanical dimension precision of the developed magnet blocks satisfy the specifications of SSRF initial undulators.