Performances of a linear type magnetic flux pump for compensating a little decremented persistent current of HTS magnets

This paper describes the characteristics of a linear type magnetic flux pump recently developed. The linear type flux pump has been fabricated to apply to compensate decremented persistent current of HTS applications such as NMR and MRI system. The linear type magnetic flux pump mainly consists of 3-phase AC armature coil, DC bias coil and superconducting Nb foil. In the preliminary experiment, the flux pump can charge the pumping-up current in the load coil of 1.3 mH during 1000 seconds under the DC bias current of 10 A and 3-phase AC of 8 A, 60 Hz. The magnitude of pumping current is 0.1 mA/s.