Design and Research of Cryostat for 3W1 Superconducting Wiggler Magnet

The cryostat chiefly consists of external vacuum housing, 60 K shield screens, liquid helium vessel with an SC multipole magnet inside, vacuum chamber (beam duct) with copper liner inside, and four two-stage cryocoolers with a stage temperature of 4.2 K/60 K. Current leads have heat in-leak interception in vacuum using cryocoolers. The helium vessel is suspended with four vertical and four horizontal CFRP (T300) tension rods connected to the external cryostat vessel. These tension rods pass throughout the 60 K shield screens and attach to bolts on the external housing walls and are used for precise alignment of the vertical magnet position.