The Design and Magnetic Measurement of a SuperBend Dipole Magnet at SSRF

In order to increase the critical photon energy, and to save space for accommodating more insertion devices, four normal bend magnets will be replaced by high field ones during the phase-II beamline project of the Shanghai Synchrotron Radiation Facility (SSRF). The design of these superbends has been finished; the first one has been manufactured and measured recently at SSRF. This water-cooled resistive magnet has a total length of 1000 mm and a steering field of 2.32 T. An air slot in the magnet pole was used to control the uniformity of the field integral distribution. The design as well as the magnetic measurement results are presented. Also presented is a newly developed field shimming method, which has been verified as effective and convenient in the field integral shimming of a magnet with straight air slots in the poles.