Cooling structure for 6 T NbTi superconducting magnet directly cooled by cryocooler

This paper describes the cooling structure for a 6 T NbTi superconducting coil directly cooled by a cryocooler. The cooling structure was designed to remove AC loss of the coil lest the coil temperature should exceed the current sharing temperature during coil charging. A copper cylinder surrounding the outer surface of the coil was adopted as the cooling structure. Indium sheet was inserted betwe...