Experiment research on Sm₂Co₁₇ magnets for SSRF in-vacuum undulators

The development technology of Sm2Co17 magnets in China has been improved and sample magnets of three forming-sintering designs have been tested. The test results show that the magnetic properties of Sm2Co17 magnets are improved, and their magnetic moment consistence and stability are fine. The regular magnetic field distribution data and optimized design of Chinas Sm2Co17 magnets for in-vacuum undulators(IVUs) were obtained and analyzed. Domestic Sm2Co17 magnets will be first installed in the IVUs for the Shanghai protein line station of Shanghai Synchrotron Radiation Facility.