Speaker
Dr
Wei Zhang
(Shanghai Advanced Research Institute, Chinese Academy of Sciences)
Description
The Shanghai Synchrotron Radiation Facility (SSRF) insertion device team is developing several 4.2-meter-long elliptically polarized undulators (EPU) for the Hefei Advanced Light Facility (HALF). Magnet keepers are directly installed onto the sliding girders, rather than utilizing traditional pre-assembled subassemblies, to ensure precise positioning of the magnets in the beam direction. We employed a Hall probe to measure the spatial magnetic field of individual magnets, and took into account machining errors and mechanical deformations in the sorting algorithm. In this paper, we describe the testing process for individual magnets, the measurement of mechanical errors, the sorting algorithm, and demonstrate the optimization results.
