Development of a Superconducting Undulator Prototype at the SSRF

Development of a 50-period superconducting undulator prototype is underway at the Shanghai Synchrotron Radiation Facility. The prototype is composed of magnetic system, cooling system, and cryostat. The SCU magnet system has a period length of 16 mm and a magnetic gap of 9.5 mm. The coils are wound with NbTi/Cu conductors. The design operation current is 400 A to produce a peak field on axis of 0.67 T. The cooling system includes four cryocoolers and independent cooling circuits for magnet and the beam vacuum chamber. The manufacturing of the magnet and beam vacuum chamber is in progress. The cooling test of the cryostat was performed using a dummy load. Stand-alone test of the prototype is planned in December 2016. Installation into the storage ring is scheduled in July 2017.