Test of Linear Type Magnetic Flux Pump for Compensating Persistent Current in Superconducting Magnets under Pre-charged Operational Current
Test of Linear Type Magnetic Flux Pump for Compensating Persistent Current in Superconducting Magnets under Pre-charged Operational Current$B!!(J
$Bu#(JChung Yoondo
Kyoto University
Compared with LTS coils, since HTS coils have a low n-index value, HTS coils could not keep the persistent current constant substantially. From this point of view, the linear type magnetic flux pump was designed to compensate a decremental persistent current of the HTS magnet such as NMR and MRI systems. The flux pump mainly consists of DC bias coil, 3-phase AC coil and Nb foil. In this paper, it has been investigated that the flux pump can effectively charge the current in the load coil of 543 mH for various frequencies at the pre-charged operational current under DC bias of 10 A and AC of 5 Arms.
linear type magnetic flux pump,persistent current compensator,superconducting magnet,,,