Title :
Performances of a linear type magnetic flux pump for compensating a little decremented persistent current of HTS magnets
Author :
Chung, Yoondo ; Muta, Itsuya ; Hoshino, Tsutomu ; Nakamura, Taketsune
Author_Institution :
Eng. Dept., Kyoto Univ., Japan
fDate :
6/1/2004 12:00:00 AM
Abstract :
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.
Keywords :
compensation; high-temperature superconductors; magnetic flux; niobium; persistent currents; superconducting coils; superconducting magnets; 10 A; 3-phase AC armature coil; 60 Hz; 8 A; DC bias coil; DC bias current; HTS magnets; MRI system; NMR system; Nb; decremented persistent current compensation; linear type magnetic flux pump; load coil; pumping-up current; superconducting Nb foil; High temperature superconductors; Magnetic cores; Magnetic fields; Magnetic flux; Magnetic flux density; Niobium; Nuclear magnetic resonance; Persistent currents; Superconducting coils; Superconducting magnets; Linear type magnetic flux pump; Nb foil; persistent current compensation;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2004.831054
