Progress on the Development of Cryostat for Quadrupole Triplet Magnet

Abstract

The project involving the development of a heavy ion accelerator facility to produce rare isotope beams is underway in Korea. The superconducting magnet should be designed to accelerate various ions for the magnetic bending limit up to 400 MeV. The cryostat for this magnet employs an innovative design primarily driven by the requirement of user-friendliness and reliability. Also, several ancillary requirements such as background field, space restriction due to the beam line, and cryostat structure need technical attentions. The present paper describes the status of the development of the cryostat for quadrupole triplet magnet in the in-flight fragmentation separator. The concept of cryogenic design is reported, and the amount of cryogenic load is estimated by relevant thermal analysis. The structure of the cryostat to endure the heavy iron yoke including three quadrupole magnets is presented. In addition, the detail cryogenic cooling by cryocoolers and the support link for the superconducting magnet are discussed.