Research and development of a 0.5-m-long helical superconducting undulator prototype

Owing to the higher field strength provided by the superconducting undulator compared to the conventional permanent-magnet undulator, greater research efforts should be directed towards this area. The helical superconducting undulator holds great potential in synchrotron radiation facilities, especially in low-energy storage rings that seek circularly polarized radiation with the highest possible radiation flux.

Following the successful development of planar superconducting undulators, the Institute of High-Energy Physics conducted research and development for the helical superconducting undulator. A 0.5−m-long Delta-type prototype superconducting undulator was developed and tested. Detailed information on the design, fabrication, and cryogenic testing of the prototype are presented and discussed.